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Commit | Line | Data |
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cd0b6c53 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #include <errno.h> | |
ca78ad1d | 4 | #include <locale.h> |
cd0b6c53 LP |
5 | #include <math.h> |
6 | #include <stdarg.h> | |
cd0b6c53 | 7 | #include <stdlib.h> |
cd0b6c53 LP |
8 | #include <sys/types.h> |
9 | ||
10 | #include "sd-messages.h" | |
11 | ||
12 | #include "alloc-util.h" | |
2b2fec7d | 13 | #include "errno-util.h" |
cd0b6c53 LP |
14 | #include "fd-util.h" |
15 | #include "fileio.h" | |
16 | #include "float.h" | |
17 | #include "hexdecoct.h" | |
18 | #include "json-internal.h" | |
19 | #include "json.h" | |
20 | #include "macro.h" | |
0a970718 | 21 | #include "memory-util.h" |
cd0b6c53 LP |
22 | #include "string-table.h" |
23 | #include "string-util.h" | |
24 | #include "strv.h" | |
25 | #include "terminal-util.h" | |
a42ef715 | 26 | #include "user-util.h" |
cd0b6c53 LP |
27 | #include "utf8.h" |
28 | ||
898820ed | 29 | /* Refuse putting together variants with a larger depth than 2K by default (as a protection against overflowing stacks |
b2fa0d4f | 30 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
d4a389eb | 31 | * remains under 2^16. |
898820ed LP |
32 | * |
33 | * The value first was 16k, but it was discovered to be too high on llvm/x86-64. See also: | |
34 | * https://github.com/systemd/systemd/issues/10738 | |
35 | * | |
36 | * The value then was 4k, but it was discovered to be too high on s390x/aarch64. See also: | |
37 | * https://github.com/systemd/systemd/issues/14396 */ | |
38 | ||
39 | #define DEPTH_MAX (2U*1024U) | |
b2fa0d4f LP |
40 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
41 | ||
cd0b6c53 LP |
42 | typedef struct JsonSource { |
43 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
44 | size_t n_ref; | |
45 | unsigned max_line; | |
46 | unsigned max_column; | |
47 | char name[]; | |
48 | } JsonSource; | |
49 | ||
50 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
51 | struct JsonVariant { | |
52 | union { | |
53 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
54 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
55 | * see below.) */ | |
56 | size_t n_ref; | |
57 | ||
58 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
59 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
60 | JsonVariant *parent; | |
61 | }; | |
62 | ||
a7efb030 LP |
63 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ |
64 | JsonSource *source; | |
65 | unsigned line, column; | |
66 | ||
cd0b6c53 LP |
67 | JsonVariantType type:5; |
68 | ||
69 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
70 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
71 | bool is_embedded:1; | |
72 | ||
73 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
74 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
75 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
76 | bool is_reference:1; | |
77 | ||
78 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
79 | bool is_marked:1; | |
80 | ||
b7fc90a2 | 81 | /* Erase from memory when freeing */ |
83bc6cb7 LP |
82 | bool sensitive:1; |
83 | ||
b7fc90a2 LP |
84 | /* If this is an object the fields are strictly ordered by name */ |
85 | bool sorted:1; | |
86 | ||
87 | /* If in addition to this object all objects referenced by it are also ordered strictly by name */ | |
88 | bool normalized:1; | |
89 | ||
b2fa0d4f LP |
90 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
91 | uint16_t depth; | |
cd0b6c53 LP |
92 | |
93 | union { | |
94 | /* For simple types we store the value in-line. */ | |
95 | JsonValue value; | |
96 | ||
97 | /* For objects and arrays we store the number of elements immediately following */ | |
98 | size_t n_elements; | |
99 | ||
100 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
101 | JsonVariant *reference; | |
102 | ||
103 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
104 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
105 | * element, while longer strings are stored as references. When this object is not embedded into an | |
106 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
107 | * much larger than INLINE_STRING_LENGTH. | |
108 | * | |
109 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
110 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
111 | * would the union and then the struct this is included in. And of structures with undefined size we | |
112 | * can't allocate arrays (at least not easily). */ | |
113 | char string[0]; | |
114 | }; | |
115 | }; | |
116 | ||
117 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
118 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
119 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
120 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
121 | ||
122 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
123 | * (x86-64). */ | |
124 | #ifdef __x86_64__ | |
125 | assert_cc(sizeof(JsonVariant) == 48U); | |
126 | assert_cc(INLINE_STRING_MAX == 15U); | |
127 | #endif | |
128 | ||
129 | static JsonSource* json_source_new(const char *name) { | |
130 | JsonSource *s; | |
131 | ||
132 | assert(name); | |
133 | ||
134 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
135 | if (!s) | |
136 | return NULL; | |
137 | ||
138 | *s = (JsonSource) { | |
139 | .n_ref = 1, | |
140 | }; | |
141 | strcpy(s->name, name); | |
142 | ||
143 | return s; | |
144 | } | |
145 | ||
146 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
147 | ||
148 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
149 | if (a == b) | |
150 | return true; | |
151 | ||
152 | if (!a || !b) | |
153 | return false; | |
154 | ||
155 | return streq(a->name, b->name); | |
156 | } | |
157 | ||
158 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
159 | ||
d520d519 LP |
160 | /* There are four kind of JsonVariant* pointers: |
161 | * | |
162 | * 1. NULL | |
163 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
164 | * 3. A 'magic' one, i.e. one of the special JSON_VARIANT_MAGIC_XYZ values, that encode a few very basic values directly in the pointer. | |
165 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
166 | * | |
167 | * The four kinds of pointers can be discerned like this: | |
168 | * | |
169 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
170 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
171 | * OSes, as it is a faulting page). In order to discern #2 and #4 we check the lowest bit. If it's off it's #2, | |
172 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
173 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
174 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
175 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
176 | ||
cd0b6c53 | 177 | static bool json_variant_is_magic(const JsonVariant *v) { |
4fcb507a LP |
178 | if (!v) |
179 | return false; | |
180 | ||
181 | return v < _JSON_VARIANT_MAGIC_MAX; | |
cd0b6c53 LP |
182 | } |
183 | ||
d520d519 LP |
184 | static bool json_variant_is_const_string(const JsonVariant *v) { |
185 | ||
186 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
187 | return false; | |
188 | ||
189 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
190 | * hence use all uneven pointers as indicators for const strings. */ | |
191 | ||
192 | return (((uintptr_t) v) & 1) != 0; | |
193 | } | |
194 | ||
195 | static bool json_variant_is_regular(const JsonVariant *v) { | |
196 | ||
197 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
198 | return false; | |
199 | ||
200 | return (((uintptr_t) v) & 1) == 0; | |
cd0b6c53 LP |
201 | } |
202 | ||
203 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
204 | ||
205 | /* Recursively dereference variants that are references to other variants */ | |
206 | ||
207 | if (!v) | |
208 | return NULL; | |
209 | ||
d520d519 | 210 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
211 | return v; |
212 | ||
213 | if (!v->is_reference) | |
214 | return v; | |
215 | ||
216 | return json_variant_dereference(v->reference); | |
217 | } | |
218 | ||
b2fa0d4f LP |
219 | static uint16_t json_variant_depth(JsonVariant *v) { |
220 | ||
221 | v = json_variant_dereference(v); | |
222 | if (!v) | |
223 | return 0; | |
224 | ||
d520d519 | 225 | if (!json_variant_is_regular(v)) |
b2fa0d4f LP |
226 | return 0; |
227 | ||
228 | return v->depth; | |
229 | } | |
230 | ||
b7fc90a2 | 231 | static JsonVariant *json_variant_formalize(JsonVariant *v) { |
cd0b6c53 | 232 | |
b7fc90a2 LP |
233 | /* Converts json variant pointers to their normalized form, i.e. fully dereferenced and wherever |
234 | * possible converted to the "magic" version if there is one */ | |
cd0b6c53 LP |
235 | |
236 | if (!v) | |
237 | return NULL; | |
238 | ||
239 | v = json_variant_dereference(v); | |
240 | ||
241 | switch (json_variant_type(v)) { | |
242 | ||
243 | case JSON_VARIANT_BOOLEAN: | |
244 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
245 | ||
246 | case JSON_VARIANT_NULL: | |
247 | return JSON_VARIANT_MAGIC_NULL; | |
248 | ||
249 | case JSON_VARIANT_INTEGER: | |
250 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
251 | ||
252 | case JSON_VARIANT_UNSIGNED: | |
253 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
254 | ||
255 | case JSON_VARIANT_REAL: | |
6a5b28de | 256 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 257 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; |
6a5b28de | 258 | REENABLE_WARNING; |
cd0b6c53 LP |
259 | |
260 | case JSON_VARIANT_STRING: | |
261 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
262 | ||
263 | case JSON_VARIANT_ARRAY: | |
264 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
265 | ||
266 | case JSON_VARIANT_OBJECT: | |
267 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
268 | ||
269 | default: | |
270 | return v; | |
271 | } | |
272 | } | |
273 | ||
b7fc90a2 | 274 | static JsonVariant *json_variant_conservative_formalize(JsonVariant *v) { |
cd0b6c53 | 275 | |
b7fc90a2 | 276 | /* Much like json_variant_formalize(), but won't simplify if the variant has a source/line location attached to |
cd0b6c53 LP |
277 | * it, in order not to lose context */ |
278 | ||
279 | if (!v) | |
280 | return NULL; | |
281 | ||
d520d519 | 282 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
283 | return v; |
284 | ||
285 | if (v->source || v->line > 0 || v->column > 0) | |
286 | return v; | |
287 | ||
b7fc90a2 | 288 | return json_variant_formalize(v); |
cd0b6c53 LP |
289 | } |
290 | ||
291 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
292 | JsonVariant *v; | |
293 | ||
294 | assert_return(ret, -EINVAL); | |
295 | ||
2eb1c198 LP |
296 | v = malloc0(MAX(sizeof(JsonVariant), |
297 | offsetof(JsonVariant, value) + space)); | |
cd0b6c53 LP |
298 | if (!v) |
299 | return -ENOMEM; | |
300 | ||
301 | v->n_ref = 1; | |
302 | v->type = type; | |
303 | ||
304 | *ret = v; | |
305 | return 0; | |
306 | } | |
307 | ||
308 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
309 | JsonVariant *v; | |
310 | int r; | |
311 | ||
312 | assert_return(ret, -EINVAL); | |
313 | ||
314 | if (i == 0) { | |
315 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
316 | return 0; | |
317 | } | |
318 | ||
319 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
320 | if (r < 0) | |
321 | return r; | |
322 | ||
323 | v->value.integer = i; | |
324 | *ret = v; | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
330 | JsonVariant *v; | |
331 | int r; | |
332 | ||
333 | assert_return(ret, -EINVAL); | |
334 | if (u == 0) { | |
335 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
340 | if (r < 0) | |
341 | return r; | |
342 | ||
343 | v->value.unsig = u; | |
344 | *ret = v; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
350 | JsonVariant *v; | |
351 | int r; | |
352 | ||
353 | assert_return(ret, -EINVAL); | |
354 | ||
6a5b28de | 355 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 356 | if (d == 0.0) { |
cd0b6c53 LP |
357 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; |
358 | return 0; | |
359 | } | |
6a5b28de | 360 | REENABLE_WARNING; |
cd0b6c53 LP |
361 | |
362 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | v->value.real = d; | |
367 | *ret = v; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
373 | assert_return(ret, -EINVAL); | |
374 | ||
375 | if (b) | |
376 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
377 | else | |
378 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | int json_variant_new_null(JsonVariant **ret) { | |
384 | assert_return(ret, -EINVAL); | |
385 | ||
386 | *ret = JSON_VARIANT_MAGIC_NULL; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
391 | JsonVariant *v; | |
392 | int r; | |
393 | ||
394 | assert_return(ret, -EINVAL); | |
395 | if (!s) { | |
cbb3092c | 396 | assert_return(IN_SET(n, 0, (size_t) -1), -EINVAL); |
cd0b6c53 LP |
397 | return json_variant_new_null(ret); |
398 | } | |
cbb3092c LP |
399 | if (n == (size_t) -1) /* determine length automatically */ |
400 | n = strlen(s); | |
401 | else if (memchr(s, 0, n)) /* don't allow embedded NUL, as we can't express that in JSON */ | |
402 | return -EINVAL; | |
cd0b6c53 LP |
403 | if (n == 0) { |
404 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
405 | return 0; | |
406 | } | |
407 | ||
ea9afe00 ZJS |
408 | if (!utf8_is_valid_n(s, n)) /* JSON strings must be valid UTF-8 */ |
409 | return -EUCLEAN; | |
410 | ||
cd0b6c53 LP |
411 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); |
412 | if (r < 0) | |
413 | return r; | |
414 | ||
415 | memcpy(v->string, s, n); | |
416 | v->string[n] = 0; | |
417 | ||
418 | *ret = v; | |
419 | return 0; | |
420 | } | |
421 | ||
cc164891 LP |
422 | int json_variant_new_base64(JsonVariant **ret, const void *p, size_t n) { |
423 | _cleanup_free_ char *s = NULL; | |
424 | ssize_t k; | |
425 | ||
426 | assert_return(ret, -EINVAL); | |
427 | assert_return(n == 0 || p, -EINVAL); | |
428 | ||
429 | k = base64mem(p, n, &s); | |
430 | if (k < 0) | |
431 | return k; | |
432 | ||
433 | return json_variant_new_stringn(ret, s, k); | |
434 | } | |
435 | ||
0b9481cf LP |
436 | int json_variant_new_id128(JsonVariant **ret, sd_id128_t id) { |
437 | char s[SD_ID128_STRING_MAX]; | |
438 | ||
439 | return json_variant_new_string(ret, sd_id128_to_string(id, s)); | |
440 | } | |
441 | ||
cd0b6c53 LP |
442 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { |
443 | assert(a); | |
444 | ||
445 | b = json_variant_dereference(b); | |
446 | if (!b) { | |
447 | a->type = JSON_VARIANT_NULL; | |
448 | return; | |
449 | } | |
450 | ||
451 | a->type = json_variant_type(b); | |
452 | switch (a->type) { | |
453 | ||
454 | case JSON_VARIANT_INTEGER: | |
455 | a->value.integer = json_variant_integer(b); | |
456 | break; | |
457 | ||
458 | case JSON_VARIANT_UNSIGNED: | |
459 | a->value.unsig = json_variant_unsigned(b); | |
460 | break; | |
461 | ||
462 | case JSON_VARIANT_REAL: | |
463 | a->value.real = json_variant_real(b); | |
464 | break; | |
465 | ||
466 | case JSON_VARIANT_BOOLEAN: | |
467 | a->value.boolean = json_variant_boolean(b); | |
468 | break; | |
469 | ||
470 | case JSON_VARIANT_STRING: { | |
471 | const char *s; | |
472 | ||
473 | assert_se(s = json_variant_string(b)); | |
474 | ||
475 | /* Short strings we can store inline */ | |
476 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
477 | strcpy(a->string, s); | |
478 | break; | |
479 | } | |
480 | ||
481 | /* For longer strings, use a reference… */ | |
482 | _fallthrough_; | |
483 | } | |
484 | ||
485 | case JSON_VARIANT_ARRAY: | |
486 | case JSON_VARIANT_OBJECT: | |
487 | a->is_reference = true; | |
b7fc90a2 | 488 | a->reference = json_variant_ref(json_variant_conservative_formalize(b)); |
cd0b6c53 LP |
489 | break; |
490 | ||
491 | case JSON_VARIANT_NULL: | |
492 | break; | |
493 | ||
494 | default: | |
495 | assert_not_reached("Unexpected variant type"); | |
496 | } | |
497 | } | |
498 | ||
499 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
500 | assert(v); | |
501 | assert(from); | |
502 | ||
d520d519 | 503 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
504 | return; |
505 | ||
506 | v->line = from->line; | |
507 | v->column = from->column; | |
508 | v->source = json_source_ref(from->source); | |
509 | } | |
510 | ||
511 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 512 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
b7fc90a2 | 513 | bool normalized = true; |
cd0b6c53 LP |
514 | |
515 | assert_return(ret, -EINVAL); | |
516 | if (n == 0) { | |
517 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
518 | return 0; | |
519 | } | |
520 | assert_return(array, -EINVAL); | |
521 | ||
522 | v = new(JsonVariant, n + 1); | |
523 | if (!v) | |
524 | return -ENOMEM; | |
525 | ||
526 | *v = (JsonVariant) { | |
527 | .n_ref = 1, | |
528 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
529 | }; |
530 | ||
b2fa0d4f LP |
531 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
532 | JsonVariant *w = v + 1 + v->n_elements, | |
533 | *c = array[v->n_elements]; | |
534 | uint16_t d; | |
535 | ||
536 | d = json_variant_depth(c); | |
537 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
538 | return -ELNRNG; | |
539 | if (d >= v->depth) | |
540 | v->depth = d + 1; | |
cd0b6c53 LP |
541 | |
542 | *w = (JsonVariant) { | |
543 | .is_embedded = true, | |
544 | .parent = v, | |
545 | }; | |
546 | ||
b2fa0d4f LP |
547 | json_variant_set(w, c); |
548 | json_variant_copy_source(w, c); | |
b7fc90a2 LP |
549 | |
550 | if (!json_variant_is_normalized(c)) | |
551 | normalized = false; | |
cd0b6c53 LP |
552 | } |
553 | ||
b7fc90a2 LP |
554 | v->normalized = normalized; |
555 | ||
b2fa0d4f | 556 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
557 | return 0; |
558 | } | |
559 | ||
560 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
561 | JsonVariant *v; | |
562 | size_t i; | |
563 | ||
564 | assert_return(ret, -EINVAL); | |
565 | if (n == 0) { | |
566 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
567 | return 0; | |
568 | } | |
569 | assert_return(p, -EINVAL); | |
570 | ||
571 | v = new(JsonVariant, n + 1); | |
572 | if (!v) | |
573 | return -ENOMEM; | |
574 | ||
575 | *v = (JsonVariant) { | |
576 | .n_ref = 1, | |
577 | .type = JSON_VARIANT_ARRAY, | |
578 | .n_elements = n, | |
b2fa0d4f | 579 | .depth = 1, |
cd0b6c53 LP |
580 | }; |
581 | ||
582 | for (i = 0; i < n; i++) { | |
583 | JsonVariant *w = v + 1 + i; | |
584 | ||
585 | *w = (JsonVariant) { | |
586 | .is_embedded = true, | |
587 | .parent = v, | |
a1559e3f LP |
588 | .type = JSON_VARIANT_UNSIGNED, |
589 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 590 | }; |
cd0b6c53 LP |
591 | } |
592 | ||
b7fc90a2 LP |
593 | v->normalized = true; |
594 | ||
cd0b6c53 LP |
595 | *ret = v; |
596 | return 0; | |
597 | } | |
598 | ||
599 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
600 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
601 | size_t n; | |
602 | int r; | |
603 | ||
604 | assert(ret); | |
605 | ||
606 | n = strv_length(l); | |
607 | if (n == 0) { | |
608 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
609 | return 0; | |
610 | } | |
611 | ||
a1559e3f | 612 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
613 | if (!v) |
614 | return -ENOMEM; | |
615 | ||
616 | *v = (JsonVariant) { | |
617 | .n_ref = 1, | |
618 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 619 | .depth = 1, |
cd0b6c53 LP |
620 | }; |
621 | ||
622 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
623 | JsonVariant *w = v + 1 + v->n_elements; | |
624 | size_t k; | |
625 | ||
a1559e3f LP |
626 | *w = (JsonVariant) { |
627 | .is_embedded = true, | |
628 | .parent = v, | |
629 | .type = JSON_VARIANT_STRING, | |
630 | }; | |
cd0b6c53 LP |
631 | |
632 | k = strlen(l[v->n_elements]); | |
633 | ||
634 | if (k > INLINE_STRING_MAX) { | |
635 | /* If string is too long, store it as reference. */ | |
636 | ||
cbb3092c | 637 | r = json_variant_new_string(&w->reference, l[v->n_elements]); |
cd0b6c53 LP |
638 | if (r < 0) |
639 | return r; | |
640 | ||
641 | w->is_reference = true; | |
ea9afe00 ZJS |
642 | } else { |
643 | if (!utf8_is_valid_n(l[v->n_elements], k)) /* JSON strings must be valid UTF-8 */ | |
644 | return -EUCLEAN; | |
645 | ||
cd0b6c53 | 646 | memcpy(w->string, l[v->n_elements], k+1); |
ea9afe00 | 647 | } |
cd0b6c53 LP |
648 | } |
649 | ||
b7fc90a2 LP |
650 | v->normalized = true; |
651 | ||
cd0b6c53 LP |
652 | *ret = TAKE_PTR(v); |
653 | return 0; | |
654 | } | |
655 | ||
656 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 657 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
b7fc90a2 LP |
658 | const char *prev = NULL; |
659 | bool sorted = true, normalized = true; | |
cd0b6c53 LP |
660 | |
661 | assert_return(ret, -EINVAL); | |
662 | if (n == 0) { | |
663 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
664 | return 0; | |
665 | } | |
666 | assert_return(array, -EINVAL); | |
667 | assert_return(n % 2 == 0, -EINVAL); | |
668 | ||
669 | v = new(JsonVariant, n + 1); | |
670 | if (!v) | |
671 | return -ENOMEM; | |
672 | ||
673 | *v = (JsonVariant) { | |
674 | .n_ref = 1, | |
675 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
676 | }; |
677 | ||
b2fa0d4f LP |
678 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
679 | JsonVariant *w = v + 1 + v->n_elements, | |
680 | *c = array[v->n_elements]; | |
681 | uint16_t d; | |
682 | ||
b7fc90a2 LP |
683 | if ((v->n_elements & 1) == 0) { |
684 | const char *k; | |
685 | ||
686 | if (!json_variant_is_string(c)) | |
687 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
688 | ||
689 | assert_se(k = json_variant_string(c)); | |
690 | ||
691 | if (prev && strcmp(k, prev) <= 0) | |
692 | sorted = normalized = false; | |
693 | ||
694 | prev = k; | |
695 | } else if (!json_variant_is_normalized(c)) | |
696 | normalized = false; | |
d77e781f | 697 | |
b2fa0d4f LP |
698 | d = json_variant_depth(c); |
699 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
700 | return -ELNRNG; | |
701 | if (d >= v->depth) | |
702 | v->depth = d + 1; | |
cd0b6c53 LP |
703 | |
704 | *w = (JsonVariant) { | |
705 | .is_embedded = true, | |
706 | .parent = v, | |
707 | }; | |
708 | ||
b2fa0d4f LP |
709 | json_variant_set(w, c); |
710 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
711 | } |
712 | ||
b7fc90a2 LP |
713 | v->normalized = normalized; |
714 | v->sorted = sorted; | |
715 | ||
b2fa0d4f | 716 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
717 | return 0; |
718 | } | |
719 | ||
83bc6cb7 LP |
720 | static size_t json_variant_size(JsonVariant* v) { |
721 | ||
722 | if (!json_variant_is_regular(v)) | |
723 | return 0; | |
724 | ||
725 | if (v->is_reference) | |
726 | return offsetof(JsonVariant, reference) + sizeof(JsonVariant*); | |
727 | ||
728 | switch (v->type) { | |
729 | ||
730 | case JSON_VARIANT_STRING: | |
731 | return offsetof(JsonVariant, string) + strlen(v->string) + 1; | |
732 | ||
733 | case JSON_VARIANT_REAL: | |
734 | return offsetof(JsonVariant, value) + sizeof(long double); | |
735 | ||
736 | case JSON_VARIANT_UNSIGNED: | |
737 | return offsetof(JsonVariant, value) + sizeof(uintmax_t); | |
738 | ||
739 | case JSON_VARIANT_INTEGER: | |
740 | return offsetof(JsonVariant, value) + sizeof(intmax_t); | |
741 | ||
742 | case JSON_VARIANT_BOOLEAN: | |
743 | return offsetof(JsonVariant, value) + sizeof(bool); | |
744 | ||
745 | case JSON_VARIANT_ARRAY: | |
746 | case JSON_VARIANT_OBJECT: | |
747 | return offsetof(JsonVariant, n_elements) + sizeof(size_t); | |
748 | ||
749 | case JSON_VARIANT_NULL: | |
750 | return offsetof(JsonVariant, value); | |
751 | ||
752 | default: | |
753 | assert_not_reached("unexpected type"); | |
754 | } | |
755 | } | |
756 | ||
757 | static void json_variant_free_inner(JsonVariant *v, bool force_sensitive) { | |
758 | bool sensitive; | |
759 | ||
cd0b6c53 LP |
760 | assert(v); |
761 | ||
d520d519 | 762 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
763 | return; |
764 | ||
765 | json_source_unref(v->source); | |
766 | ||
83bc6cb7 LP |
767 | sensitive = v->sensitive || force_sensitive; |
768 | ||
cd0b6c53 | 769 | if (v->is_reference) { |
83bc6cb7 LP |
770 | if (sensitive) |
771 | json_variant_sensitive(v->reference); | |
772 | ||
cd0b6c53 LP |
773 | json_variant_unref(v->reference); |
774 | return; | |
775 | } | |
776 | ||
777 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
778 | size_t i; | |
779 | ||
780 | for (i = 0; i < v->n_elements; i++) | |
83bc6cb7 | 781 | json_variant_free_inner(v + 1 + i, sensitive); |
cd0b6c53 | 782 | } |
83bc6cb7 LP |
783 | |
784 | if (sensitive) | |
785 | explicit_bzero_safe(v, json_variant_size(v)); | |
cd0b6c53 LP |
786 | } |
787 | ||
788 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
789 | if (!v) | |
790 | return NULL; | |
d520d519 | 791 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
792 | return v; |
793 | ||
794 | if (v->is_embedded) | |
795 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
796 | else { | |
797 | assert(v->n_ref > 0); | |
798 | v->n_ref++; | |
799 | } | |
800 | ||
801 | return v; | |
802 | } | |
803 | ||
804 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
805 | if (!v) | |
806 | return NULL; | |
d520d519 | 807 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
808 | return NULL; |
809 | ||
810 | if (v->is_embedded) | |
811 | json_variant_unref(v->parent); | |
812 | else { | |
813 | assert(v->n_ref > 0); | |
814 | v->n_ref--; | |
815 | ||
816 | if (v->n_ref == 0) { | |
83bc6cb7 | 817 | json_variant_free_inner(v, false); |
cd0b6c53 LP |
818 | free(v); |
819 | } | |
820 | } | |
821 | ||
822 | return NULL; | |
823 | } | |
824 | ||
825 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
826 | size_t i; | |
827 | ||
828 | assert(array || n == 0); | |
829 | ||
830 | for (i = 0; i < n; i++) | |
831 | json_variant_unref(array[i]); | |
832 | } | |
833 | ||
834 | const char *json_variant_string(JsonVariant *v) { | |
835 | if (!v) | |
836 | return NULL; | |
837 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
838 | return ""; | |
839 | if (json_variant_is_magic(v)) | |
840 | goto mismatch; | |
d520d519 LP |
841 | if (json_variant_is_const_string(v)) { |
842 | uintptr_t p = (uintptr_t) v; | |
843 | ||
844 | assert((p & 1) != 0); | |
845 | return (const char*) (p ^ 1U); | |
846 | } | |
847 | ||
cd0b6c53 LP |
848 | if (v->is_reference) |
849 | return json_variant_string(v->reference); | |
850 | if (v->type != JSON_VARIANT_STRING) | |
851 | goto mismatch; | |
852 | ||
853 | return v->string; | |
854 | ||
855 | mismatch: | |
856 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
857 | return NULL; | |
858 | } | |
859 | ||
860 | bool json_variant_boolean(JsonVariant *v) { | |
861 | if (!v) | |
862 | goto mismatch; | |
863 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
864 | return true; | |
865 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
866 | return false; | |
d520d519 | 867 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
868 | goto mismatch; |
869 | if (v->type != JSON_VARIANT_BOOLEAN) | |
870 | goto mismatch; | |
871 | if (v->is_reference) | |
872 | return json_variant_boolean(v->reference); | |
873 | ||
874 | return v->value.boolean; | |
875 | ||
876 | mismatch: | |
877 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
878 | return false; | |
879 | } | |
880 | ||
881 | intmax_t json_variant_integer(JsonVariant *v) { | |
882 | if (!v) | |
883 | goto mismatch; | |
884 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
885 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
886 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
887 | return 0; | |
d520d519 | 888 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
889 | goto mismatch; |
890 | if (v->is_reference) | |
891 | return json_variant_integer(v->reference); | |
892 | ||
893 | switch (v->type) { | |
894 | ||
895 | case JSON_VARIANT_INTEGER: | |
896 | return v->value.integer; | |
897 | ||
898 | case JSON_VARIANT_UNSIGNED: | |
899 | if (v->value.unsig <= INTMAX_MAX) | |
900 | return (intmax_t) v->value.unsig; | |
901 | ||
902 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
903 | return 0; | |
904 | ||
905 | case JSON_VARIANT_REAL: { | |
906 | intmax_t converted; | |
907 | ||
908 | converted = (intmax_t) v->value.real; | |
909 | ||
6a5b28de | 910 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 911 | if ((long double) converted == v->value.real) |
cd0b6c53 | 912 | return converted; |
6a5b28de | 913 | REENABLE_WARNING; |
cd0b6c53 LP |
914 | |
915 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
916 | return 0; | |
917 | } | |
918 | ||
919 | default: | |
920 | break; | |
921 | } | |
922 | ||
923 | mismatch: | |
924 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
925 | return 0; | |
926 | } | |
927 | ||
928 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
929 | if (!v) | |
930 | goto mismatch; | |
931 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
932 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
933 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
934 | return 0; | |
d520d519 | 935 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
936 | goto mismatch; |
937 | if (v->is_reference) | |
938 | return json_variant_integer(v->reference); | |
939 | ||
940 | switch (v->type) { | |
941 | ||
942 | case JSON_VARIANT_INTEGER: | |
943 | if (v->value.integer >= 0) | |
944 | return (uintmax_t) v->value.integer; | |
945 | ||
946 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
947 | return 0; | |
948 | ||
949 | case JSON_VARIANT_UNSIGNED: | |
950 | return v->value.unsig; | |
951 | ||
952 | case JSON_VARIANT_REAL: { | |
953 | uintmax_t converted; | |
954 | ||
955 | converted = (uintmax_t) v->value.real; | |
956 | ||
6a5b28de | 957 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 958 | if ((long double) converted == v->value.real) |
cd0b6c53 | 959 | return converted; |
6a5b28de | 960 | REENABLE_WARNING; |
cd0b6c53 LP |
961 | |
962 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
963 | return 0; | |
964 | } | |
965 | ||
966 | default: | |
967 | break; | |
968 | } | |
969 | ||
970 | mismatch: | |
971 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | long double json_variant_real(JsonVariant *v) { | |
976 | if (!v) | |
977 | return 0.0; | |
978 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
979 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
980 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
981 | return 0.0; | |
d520d519 | 982 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
983 | goto mismatch; |
984 | if (v->is_reference) | |
985 | return json_variant_real(v->reference); | |
986 | ||
987 | switch (v->type) { | |
988 | ||
989 | case JSON_VARIANT_REAL: | |
990 | return v->value.real; | |
991 | ||
992 | case JSON_VARIANT_INTEGER: { | |
993 | long double converted; | |
994 | ||
995 | converted = (long double) v->value.integer; | |
996 | ||
997 | if ((intmax_t) converted == v->value.integer) | |
998 | return converted; | |
999 | ||
1000 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
1001 | return 0.0; | |
1002 | } | |
1003 | ||
1004 | case JSON_VARIANT_UNSIGNED: { | |
1005 | long double converted; | |
1006 | ||
1007 | converted = (long double) v->value.unsig; | |
1008 | ||
1009 | if ((uintmax_t) converted == v->value.unsig) | |
1010 | return converted; | |
1011 | ||
1012 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
1013 | return 0.0; | |
1014 | } | |
1015 | ||
1016 | default: | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | mismatch: | |
1021 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 1022 | return 0.0; |
cd0b6c53 LP |
1023 | } |
1024 | ||
1025 | bool json_variant_is_negative(JsonVariant *v) { | |
1026 | if (!v) | |
1027 | goto mismatch; | |
1028 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
1029 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
1030 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1031 | return false; | |
d520d519 | 1032 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1033 | goto mismatch; |
1034 | if (v->is_reference) | |
1035 | return json_variant_is_negative(v->reference); | |
1036 | ||
1037 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
1038 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
1039 | * values. */ | |
1040 | ||
1041 | switch (v->type) { | |
1042 | ||
1043 | case JSON_VARIANT_REAL: | |
1044 | return v->value.real < 0; | |
1045 | ||
1046 | case JSON_VARIANT_INTEGER: | |
1047 | return v->value.integer < 0; | |
1048 | ||
1049 | case JSON_VARIANT_UNSIGNED: | |
1050 | return false; | |
1051 | ||
1052 | default: | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | mismatch: | |
1057 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
1058 | return false; | |
1059 | } | |
1060 | ||
e787b211 LP |
1061 | bool json_variant_is_blank_object(JsonVariant *v) { |
1062 | /* Returns true if the specified object is null or empty */ | |
1063 | return !v || | |
1064 | json_variant_is_null(v) || | |
1065 | (json_variant_is_object(v) && json_variant_elements(v) == 0); | |
1066 | } | |
1067 | ||
1068 | bool json_variant_is_blank_array(JsonVariant *v) { | |
1069 | return !v || | |
1070 | json_variant_is_null(v) || | |
1071 | (json_variant_is_array(v) && json_variant_elements(v) == 0); | |
1072 | } | |
1073 | ||
cd0b6c53 LP |
1074 | JsonVariantType json_variant_type(JsonVariant *v) { |
1075 | ||
1076 | if (!v) | |
1077 | return _JSON_VARIANT_TYPE_INVALID; | |
1078 | ||
d520d519 LP |
1079 | if (json_variant_is_const_string(v)) |
1080 | return JSON_VARIANT_STRING; | |
1081 | ||
cd0b6c53 LP |
1082 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
1083 | return JSON_VARIANT_BOOLEAN; | |
1084 | ||
1085 | if (v == JSON_VARIANT_MAGIC_NULL) | |
1086 | return JSON_VARIANT_NULL; | |
1087 | ||
1088 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
1089 | return JSON_VARIANT_INTEGER; | |
1090 | ||
1091 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
1092 | return JSON_VARIANT_UNSIGNED; | |
1093 | ||
1094 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1095 | return JSON_VARIANT_REAL; | |
1096 | ||
1097 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
1098 | return JSON_VARIANT_STRING; | |
1099 | ||
1100 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
1101 | return JSON_VARIANT_ARRAY; | |
1102 | ||
1103 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1104 | return JSON_VARIANT_OBJECT; | |
1105 | ||
1106 | return v->type; | |
1107 | } | |
1108 | ||
8e2fa6e2 | 1109 | _function_no_sanitize_float_cast_overflow_ bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { |
cd0b6c53 LP |
1110 | JsonVariantType rt; |
1111 | ||
8e2fa6e2 LP |
1112 | /* Note: we turn off ubsan float cast overflo detection for this function, since it would complain |
1113 | * about our float casts but we do them explicitly to detect conversion errors. */ | |
1114 | ||
cd0b6c53 | 1115 | v = json_variant_dereference(v); |
f8c186c9 LP |
1116 | if (!v) |
1117 | return false; | |
cd0b6c53 LP |
1118 | |
1119 | rt = json_variant_type(v); | |
1120 | if (rt == type) | |
1121 | return true; | |
1122 | ||
d520d519 LP |
1123 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
1124 | if (json_variant_is_const_string(v)) | |
1125 | return false; | |
1126 | ||
cd0b6c53 LP |
1127 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
1128 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
1129 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
1130 | return true; | |
1131 | ||
1132 | /* All other magic variant types are only equal to themselves */ | |
1133 | if (json_variant_is_magic(v)) | |
1134 | return false; | |
1135 | ||
1136 | /* Handle the "number" pseudo type */ | |
1137 | if (type == JSON_VARIANT_NUMBER) | |
1138 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1139 | ||
1140 | /* Integer conversions are OK in many cases */ | |
1141 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1142 | return v->value.integer >= 0; | |
1143 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1144 | return v->value.unsig <= INTMAX_MAX; | |
1145 | ||
1146 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1147 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1148 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1149 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1150 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1151 | ||
6a5b28de LP |
1152 | DISABLE_WARNING_FLOAT_EQUAL; |
1153 | ||
cd0b6c53 LP |
1154 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ |
1155 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1156 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1157 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1158 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
6a5b28de LP |
1159 | |
1160 | REENABLE_WARNING; | |
cd0b6c53 LP |
1161 | |
1162 | return false; | |
1163 | } | |
1164 | ||
1165 | size_t json_variant_elements(JsonVariant *v) { | |
1166 | if (!v) | |
1167 | return 0; | |
1168 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1169 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1170 | return 0; | |
d520d519 | 1171 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1172 | goto mismatch; |
1173 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1174 | goto mismatch; | |
1175 | if (v->is_reference) | |
1176 | return json_variant_elements(v->reference); | |
1177 | ||
1178 | return v->n_elements; | |
1179 | ||
1180 | mismatch: | |
1181 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1186 | if (!v) | |
1187 | return NULL; | |
1188 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1189 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1190 | return NULL; | |
d520d519 | 1191 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1192 | goto mismatch; |
1193 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1194 | goto mismatch; | |
1195 | if (v->is_reference) | |
1196 | return json_variant_by_index(v->reference, idx); | |
1197 | if (idx >= v->n_elements) | |
1198 | return NULL; | |
1199 | ||
b7fc90a2 | 1200 | return json_variant_conservative_formalize(v + 1 + idx); |
cd0b6c53 LP |
1201 | |
1202 | mismatch: | |
1203 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1204 | return NULL; | |
1205 | } | |
1206 | ||
1207 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1208 | size_t i; | |
1209 | ||
1210 | if (!v) | |
1211 | goto not_found; | |
1212 | if (!key) | |
1213 | goto not_found; | |
1214 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1215 | goto not_found; | |
d520d519 | 1216 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1217 | goto mismatch; |
1218 | if (v->type != JSON_VARIANT_OBJECT) | |
1219 | goto mismatch; | |
1220 | if (v->is_reference) | |
1221 | return json_variant_by_key(v->reference, key); | |
1222 | ||
b7fc90a2 LP |
1223 | if (v->sorted) { |
1224 | size_t a = 0, b = v->n_elements/2; | |
1225 | ||
1226 | /* If the variant is sorted we can use bisection to find the entry we need in O(log(n)) time */ | |
1227 | ||
1228 | while (b > a) { | |
1229 | JsonVariant *p; | |
1230 | const char *f; | |
1231 | int c; | |
1232 | ||
1233 | i = (a + b) / 2; | |
1234 | p = json_variant_dereference(v + 1 + i*2); | |
1235 | ||
1236 | assert_se(f = json_variant_string(p)); | |
1237 | ||
1238 | c = strcmp(key, f); | |
1239 | if (c == 0) { | |
1240 | if (ret_key) | |
1241 | *ret_key = json_variant_conservative_formalize(v + 1 + i*2); | |
1242 | ||
1243 | return json_variant_conservative_formalize(v + 1 + i*2 + 1); | |
1244 | } else if (c < 0) | |
1245 | b = i; | |
1246 | else | |
1247 | a = i + 1; | |
1248 | } | |
1249 | ||
1250 | goto not_found; | |
1251 | } | |
1252 | ||
1253 | /* The variant is not sorted, hence search for the field linearly */ | |
cd0b6c53 LP |
1254 | for (i = 0; i < v->n_elements; i += 2) { |
1255 | JsonVariant *p; | |
1256 | ||
1257 | p = json_variant_dereference(v + 1 + i); | |
1258 | ||
1259 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1260 | continue; | |
1261 | ||
1262 | if (streq(json_variant_string(p), key)) { | |
1263 | ||
1264 | if (ret_key) | |
b7fc90a2 | 1265 | *ret_key = json_variant_conservative_formalize(v + 1 + i); |
cd0b6c53 | 1266 | |
b7fc90a2 | 1267 | return json_variant_conservative_formalize(v + 1 + i + 1); |
cd0b6c53 LP |
1268 | } |
1269 | } | |
1270 | ||
1271 | not_found: | |
1272 | if (ret_key) | |
1273 | *ret_key = NULL; | |
1274 | ||
1275 | return NULL; | |
1276 | ||
1277 | mismatch: | |
1278 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1279 | if (ret_key) | |
1280 | *ret_key = NULL; | |
1281 | ||
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1286 | return json_variant_by_key_full(v, key, NULL); | |
1287 | } | |
1288 | ||
1289 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1290 | JsonVariantType t; | |
1291 | ||
b7fc90a2 LP |
1292 | a = json_variant_formalize(a); |
1293 | b = json_variant_formalize(b); | |
cd0b6c53 LP |
1294 | |
1295 | if (a == b) | |
1296 | return true; | |
1297 | ||
1298 | t = json_variant_type(a); | |
1299 | if (!json_variant_has_type(b, t)) | |
1300 | return false; | |
1301 | ||
1302 | switch (t) { | |
1303 | ||
1304 | case JSON_VARIANT_STRING: | |
1305 | return streq(json_variant_string(a), json_variant_string(b)); | |
1306 | ||
1307 | case JSON_VARIANT_INTEGER: | |
1308 | return json_variant_integer(a) == json_variant_integer(b); | |
1309 | ||
1310 | case JSON_VARIANT_UNSIGNED: | |
1311 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1312 | ||
1313 | case JSON_VARIANT_REAL: | |
6a5b28de | 1314 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 1315 | return json_variant_real(a) == json_variant_real(b); |
6a5b28de | 1316 | REENABLE_WARNING; |
cd0b6c53 LP |
1317 | |
1318 | case JSON_VARIANT_BOOLEAN: | |
1319 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1320 | ||
1321 | case JSON_VARIANT_NULL: | |
1322 | return true; | |
1323 | ||
1324 | case JSON_VARIANT_ARRAY: { | |
1325 | size_t i, n; | |
1326 | ||
1327 | n = json_variant_elements(a); | |
1328 | if (n != json_variant_elements(b)) | |
1329 | return false; | |
1330 | ||
1331 | for (i = 0; i < n; i++) { | |
1332 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1333 | return false; | |
1334 | } | |
1335 | ||
1336 | return true; | |
1337 | } | |
1338 | ||
1339 | case JSON_VARIANT_OBJECT: { | |
1340 | size_t i, n; | |
1341 | ||
1342 | n = json_variant_elements(a); | |
1343 | if (n != json_variant_elements(b)) | |
1344 | return false; | |
1345 | ||
1346 | /* Iterate through all keys in 'a' */ | |
1347 | for (i = 0; i < n; i += 2) { | |
1348 | bool found = false; | |
1349 | size_t j; | |
1350 | ||
1351 | /* Match them against all keys in 'b' */ | |
1352 | for (j = 0; j < n; j += 2) { | |
1353 | JsonVariant *key_b; | |
1354 | ||
1355 | key_b = json_variant_by_index(b, j); | |
1356 | ||
1357 | /* During the first iteration unmark everything */ | |
1358 | if (i == 0) | |
1359 | key_b->is_marked = false; | |
1360 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1361 | continue; | |
1362 | ||
1363 | if (found) | |
1364 | continue; | |
1365 | ||
1366 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1367 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1368 | /* Key and values match! */ | |
1369 | key_b->is_marked = found = true; | |
1370 | ||
1371 | /* In the first iteration we continue the inner loop since we want to mark | |
1372 | * everything, otherwise exit the loop quickly after we found what we were | |
1373 | * looking for. */ | |
1374 | if (i != 0) | |
1375 | break; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | if (!found) | |
1380 | return false; | |
1381 | } | |
1382 | ||
1383 | return true; | |
1384 | } | |
1385 | ||
1386 | default: | |
1387 | assert_not_reached("Unknown variant type."); | |
1388 | } | |
1389 | } | |
1390 | ||
83bc6cb7 LP |
1391 | void json_variant_sensitive(JsonVariant *v) { |
1392 | assert(v); | |
1393 | ||
1394 | /* Marks a variant as "sensitive", so that it is erased from memory when it is destroyed. This is a | |
1395 | * one-way operation: as soon as it is marked this way it remains marked this way until it's | |
162392b7 | 1396 | * destroyed. A magic variant is never sensitive though, even when asked, since it's too |
83bc6cb7 LP |
1397 | * basic. Similar, const string variant are never sensitive either, after all they are included in |
1398 | * the source code as they are, which is not suitable for inclusion of secrets. | |
1399 | * | |
1400 | * Note that this flag has a recursive effect: when we destroy an object or array we'll propagate the | |
1401 | * flag to all contained variants. And if those are then destroyed this is propagated further down, | |
1402 | * and so on. */ | |
1403 | ||
b7fc90a2 | 1404 | v = json_variant_formalize(v); |
83bc6cb7 LP |
1405 | if (!json_variant_is_regular(v)) |
1406 | return; | |
1407 | ||
1408 | v->sensitive = true; | |
1409 | } | |
1410 | ||
94600eeb LP |
1411 | bool json_variant_is_sensitive(JsonVariant *v) { |
1412 | v = json_variant_formalize(v); | |
1413 | if (!json_variant_is_regular(v)) | |
1414 | return false; | |
1415 | ||
1416 | return v->sensitive; | |
1417 | } | |
1418 | ||
1419 | static void json_variant_propagate_sensitive(JsonVariant *from, JsonVariant *to) { | |
1420 | if (json_variant_is_sensitive(from)) | |
1421 | json_variant_sensitive(to); | |
1422 | } | |
1423 | ||
cd0b6c53 LP |
1424 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { |
1425 | assert_return(v, -EINVAL); | |
1426 | ||
1427 | if (ret_source) | |
d520d519 | 1428 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1429 | |
1430 | if (ret_line) | |
d520d519 | 1431 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1432 | |
1433 | if (ret_column) | |
d520d519 | 1434 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1435 | |
1436 | return 0; | |
1437 | } | |
1438 | ||
897f099b | 1439 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1440 | size_t w, k; |
1441 | ||
1442 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1443 | return 0; | |
1444 | ||
d520d519 | 1445 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1446 | return 0; |
1447 | ||
1448 | if (!v->source && v->line == 0 && v->column == 0) | |
1449 | return 0; | |
1450 | ||
1451 | /* The max width we need to format the line numbers for this source file */ | |
1452 | w = (v->source && v->source->max_line > 0) ? | |
1453 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1454 | DECIMAL_STR_MAX(unsigned)-1; | |
1455 | k = (v->source && v->source->max_column > 0) ? | |
1456 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1457 | DECIMAL_STR_MAX(unsigned) -1; | |
1458 | ||
1459 | if (whitespace) { | |
1460 | size_t i, n; | |
1461 | ||
1462 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1463 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1464 | (v->line > 0 ? w : 0) + | |
1465 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1466 | (v->column > 0 ? k : 0) + | |
1467 | 2; | |
1468 | ||
1469 | for (i = 0; i < n; i++) | |
1470 | fputc(' ', f); | |
1471 | } else { | |
1472 | fputc('[', f); | |
1473 | ||
1474 | if (v->source) | |
1475 | fputs(v->source->name, f); | |
1476 | if (v->source && (v->line > 0 || v->column > 0)) | |
1477 | fputc(':', f); | |
1478 | if (v->line > 0) | |
1479 | fprintf(f, "%*u", (int) w, v->line); | |
1480 | if ((v->source || v->line > 0) || v->column > 0) | |
1481 | fputc(':', f); | |
1482 | if (v->column > 0) | |
1483 | fprintf(f, "%*u", (int) k, v->column); | |
1484 | ||
1485 | fputc(']', f); | |
1486 | fputc(' ', f); | |
1487 | } | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
e12b6e19 ZJS |
1492 | static void json_format_string(FILE *f, const char *q, JsonFormatFlags flags) { |
1493 | assert(q); | |
1494 | ||
1495 | fputc('"', f); | |
1496 | ||
1497 | if (flags & JSON_FORMAT_COLOR) | |
1498 | fputs(ANSI_GREEN, f); | |
1499 | ||
1500 | for (; *q; q++) | |
1501 | switch (*q) { | |
1502 | case '"': | |
1503 | fputs("\\\"", f); | |
1504 | break; | |
1505 | ||
1506 | case '\\': | |
1507 | fputs("\\\\", f); | |
1508 | break; | |
1509 | ||
1510 | case '\b': | |
1511 | fputs("\\b", f); | |
1512 | break; | |
1513 | ||
1514 | case '\f': | |
1515 | fputs("\\f", f); | |
1516 | break; | |
1517 | ||
1518 | case '\n': | |
1519 | fputs("\\n", f); | |
1520 | break; | |
1521 | ||
1522 | case '\r': | |
1523 | fputs("\\r", f); | |
1524 | break; | |
1525 | ||
1526 | case '\t': | |
1527 | fputs("\\t", f); | |
1528 | break; | |
1529 | ||
1530 | default: | |
1531 | if ((signed char) *q >= 0 && *q < ' ') | |
1532 | fprintf(f, "\\u%04x", *q); | |
1533 | else | |
1534 | fputc(*q, f); | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | if (flags & JSON_FORMAT_COLOR) | |
1539 | fputs(ANSI_NORMAL, f); | |
1540 | ||
1541 | fputc('"', f); | |
1542 | } | |
1543 | ||
897f099b | 1544 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1545 | int r; |
1546 | ||
1547 | assert(f); | |
1548 | assert(v); | |
1549 | ||
1550 | switch (json_variant_type(v)) { | |
1551 | ||
1552 | case JSON_VARIANT_REAL: { | |
1553 | locale_t loc; | |
1554 | ||
1555 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1556 | if (loc == (locale_t) 0) | |
1557 | return -errno; | |
1558 | ||
1559 | if (flags & JSON_FORMAT_COLOR) | |
1560 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1561 | ||
1562 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1563 | ||
1564 | if (flags & JSON_FORMAT_COLOR) | |
1565 | fputs(ANSI_NORMAL, f); | |
1566 | ||
1567 | freelocale(loc); | |
1568 | break; | |
1569 | } | |
1570 | ||
1571 | case JSON_VARIANT_INTEGER: | |
1572 | if (flags & JSON_FORMAT_COLOR) | |
1573 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1574 | ||
1575 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1576 | ||
1577 | if (flags & JSON_FORMAT_COLOR) | |
1578 | fputs(ANSI_NORMAL, f); | |
1579 | break; | |
1580 | ||
1581 | case JSON_VARIANT_UNSIGNED: | |
1582 | if (flags & JSON_FORMAT_COLOR) | |
1583 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1584 | ||
1585 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1586 | ||
1587 | if (flags & JSON_FORMAT_COLOR) | |
1588 | fputs(ANSI_NORMAL, f); | |
1589 | break; | |
1590 | ||
1591 | case JSON_VARIANT_BOOLEAN: | |
1592 | ||
1593 | if (flags & JSON_FORMAT_COLOR) | |
1594 | fputs(ANSI_HIGHLIGHT, f); | |
1595 | ||
1596 | if (json_variant_boolean(v)) | |
1597 | fputs("true", f); | |
1598 | else | |
1599 | fputs("false", f); | |
1600 | ||
1601 | if (flags & JSON_FORMAT_COLOR) | |
1602 | fputs(ANSI_NORMAL, f); | |
1603 | ||
1604 | break; | |
1605 | ||
1606 | case JSON_VARIANT_NULL: | |
1607 | if (flags & JSON_FORMAT_COLOR) | |
1608 | fputs(ANSI_HIGHLIGHT, f); | |
1609 | ||
1610 | fputs("null", f); | |
1611 | ||
1612 | if (flags & JSON_FORMAT_COLOR) | |
1613 | fputs(ANSI_NORMAL, f); | |
1614 | break; | |
1615 | ||
e12b6e19 ZJS |
1616 | case JSON_VARIANT_STRING: |
1617 | json_format_string(f, json_variant_string(v), flags); | |
cd0b6c53 | 1618 | break; |
cd0b6c53 LP |
1619 | |
1620 | case JSON_VARIANT_ARRAY: { | |
1621 | size_t i, n; | |
1622 | ||
1623 | n = json_variant_elements(v); | |
1624 | ||
1625 | if (n == 0) | |
1626 | fputs("[]", f); | |
1627 | else { | |
4ae7e4e5 | 1628 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1629 | const char *prefix2; |
1630 | ||
1631 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1632 | joined = strjoin(strempty(prefix), "\t"); |
1633 | if (!joined) | |
1634 | return -ENOMEM; | |
1635 | ||
1636 | prefix2 = joined; | |
cd0b6c53 LP |
1637 | fputs("[\n", f); |
1638 | } else { | |
1639 | prefix2 = strempty(prefix); | |
1640 | fputc('[', f); | |
1641 | } | |
1642 | ||
1643 | for (i = 0; i < n; i++) { | |
1644 | JsonVariant *e; | |
1645 | ||
1646 | assert_se(e = json_variant_by_index(v, i)); | |
1647 | ||
1648 | if (i > 0) { | |
1649 | if (flags & JSON_FORMAT_PRETTY) | |
1650 | fputs(",\n", f); | |
1651 | else | |
1652 | fputc(',', f); | |
1653 | } | |
1654 | ||
1655 | if (flags & JSON_FORMAT_PRETTY) { | |
1656 | print_source(f, e, flags, false); | |
1657 | fputs(prefix2, f); | |
1658 | } | |
1659 | ||
1660 | r = json_format(f, e, flags, prefix2); | |
1661 | if (r < 0) | |
1662 | return r; | |
1663 | } | |
1664 | ||
1665 | if (flags & JSON_FORMAT_PRETTY) { | |
1666 | fputc('\n', f); | |
1667 | print_source(f, v, flags, true); | |
1668 | fputs(strempty(prefix), f); | |
1669 | } | |
1670 | ||
1671 | fputc(']', f); | |
1672 | } | |
1673 | break; | |
1674 | } | |
1675 | ||
1676 | case JSON_VARIANT_OBJECT: { | |
1677 | size_t i, n; | |
1678 | ||
1679 | n = json_variant_elements(v); | |
1680 | ||
1681 | if (n == 0) | |
1682 | fputs("{}", f); | |
1683 | else { | |
4ae7e4e5 | 1684 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1685 | const char *prefix2; |
1686 | ||
1687 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1688 | joined = strjoin(strempty(prefix), "\t"); |
1689 | if (!joined) | |
1690 | return -ENOMEM; | |
1691 | ||
1692 | prefix2 = joined; | |
cd0b6c53 LP |
1693 | fputs("{\n", f); |
1694 | } else { | |
1695 | prefix2 = strempty(prefix); | |
1696 | fputc('{', f); | |
1697 | } | |
1698 | ||
1699 | for (i = 0; i < n; i += 2) { | |
1700 | JsonVariant *e; | |
1701 | ||
1702 | e = json_variant_by_index(v, i); | |
1703 | ||
1704 | if (i > 0) { | |
1705 | if (flags & JSON_FORMAT_PRETTY) | |
1706 | fputs(",\n", f); | |
1707 | else | |
1708 | fputc(',', f); | |
1709 | } | |
1710 | ||
1711 | if (flags & JSON_FORMAT_PRETTY) { | |
1712 | print_source(f, e, flags, false); | |
1713 | fputs(prefix2, f); | |
1714 | } | |
1715 | ||
1716 | r = json_format(f, e, flags, prefix2); | |
1717 | if (r < 0) | |
1718 | return r; | |
1719 | ||
1720 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1721 | ||
1722 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1723 | if (r < 0) | |
1724 | return r; | |
1725 | } | |
1726 | ||
1727 | if (flags & JSON_FORMAT_PRETTY) { | |
1728 | fputc('\n', f); | |
1729 | print_source(f, v, flags, true); | |
1730 | fputs(strempty(prefix), f); | |
1731 | } | |
1732 | ||
1733 | fputc('}', f); | |
1734 | } | |
1735 | break; | |
1736 | } | |
1737 | ||
1738 | default: | |
1739 | assert_not_reached("Unexpected variant type."); | |
1740 | } | |
1741 | ||
1742 | return 0; | |
1743 | } | |
1744 | ||
897f099b | 1745 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1746 | _cleanup_free_ char *s = NULL; |
1747 | size_t sz = 0; | |
1748 | int r; | |
1749 | ||
2a04712c ZJS |
1750 | /* Returns the length of the generated string (without the terminating NUL), |
1751 | * or negative on error. */ | |
1752 | ||
cd0b6c53 LP |
1753 | assert_return(v, -EINVAL); |
1754 | assert_return(ret, -EINVAL); | |
1755 | ||
1756 | { | |
1757 | _cleanup_fclose_ FILE *f = NULL; | |
1758 | ||
2fe21124 | 1759 | f = open_memstream_unlocked(&s, &sz); |
cd0b6c53 LP |
1760 | if (!f) |
1761 | return -ENOMEM; | |
1762 | ||
cd0b6c53 LP |
1763 | json_variant_dump(v, flags, f, NULL); |
1764 | ||
2a04712c ZJS |
1765 | /* Add terminating 0, so that the output buffer is a valid string. */ |
1766 | fputc('\0', f); | |
1767 | ||
cd0b6c53 LP |
1768 | r = fflush_and_check(f); |
1769 | } | |
1770 | if (r < 0) | |
1771 | return r; | |
1772 | ||
1773 | assert(s); | |
1774 | *ret = TAKE_PTR(s); | |
2a04712c ZJS |
1775 | assert(sz > 0); |
1776 | return (int) sz - 1; | |
cd0b6c53 LP |
1777 | } |
1778 | ||
897f099b | 1779 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1780 | if (!v) |
1781 | return; | |
1782 | ||
1783 | if (!f) | |
1784 | f = stdout; | |
1785 | ||
1786 | print_source(f, v, flags, false); | |
1787 | ||
ab91733c LP |
1788 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1789 | flags |= JSON_FORMAT_COLOR; | |
1790 | ||
2d814304 LP |
1791 | if (((flags & (JSON_FORMAT_PRETTY_AUTO|JSON_FORMAT_PRETTY)) == JSON_FORMAT_PRETTY_AUTO)) |
1792 | flags |= on_tty() ? JSON_FORMAT_PRETTY : JSON_FORMAT_NEWLINE; | |
1793 | ||
cd0b6c53 LP |
1794 | if (flags & JSON_FORMAT_SSE) |
1795 | fputs("data: ", f); | |
1796 | if (flags & JSON_FORMAT_SEQ) | |
1797 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1798 | ||
1799 | json_format(f, v, flags, prefix); | |
1800 | ||
1801 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1802 | fputc('\n', f); | |
1803 | if (flags & JSON_FORMAT_SSE) | |
1804 | fputc('\n', f); /* In case of SSE add a second newline */ | |
0b1f2e8a LP |
1805 | |
1806 | if (flags & JSON_FORMAT_FLUSH) | |
1807 | fflush(f); | |
cd0b6c53 LP |
1808 | } |
1809 | ||
f2ff34ff LP |
1810 | int json_variant_filter(JsonVariant **v, char **to_remove) { |
1811 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
1812 | _cleanup_free_ JsonVariant **array = NULL; | |
1813 | size_t i, n = 0, k = 0; | |
1814 | int r; | |
1815 | ||
1816 | assert(v); | |
1817 | ||
1818 | if (json_variant_is_blank_object(*v)) | |
1819 | return 0; | |
1820 | if (!json_variant_is_object(*v)) | |
1821 | return -EINVAL; | |
1822 | ||
1823 | if (strv_isempty(to_remove)) | |
1824 | return 0; | |
1825 | ||
1826 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1827 | JsonVariant *p; | |
1828 | ||
1829 | p = json_variant_by_index(*v, i); | |
1830 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1831 | return -EINVAL; | |
1832 | ||
1833 | if (strv_contains(to_remove, json_variant_string(p))) { | |
1834 | if (!array) { | |
1835 | array = new(JsonVariant*, json_variant_elements(*v) - 2); | |
1836 | if (!array) | |
1837 | return -ENOMEM; | |
1838 | ||
1839 | for (k = 0; k < i; k++) | |
1840 | array[k] = json_variant_by_index(*v, k); | |
1841 | } | |
1842 | ||
1843 | n++; | |
1844 | } else if (array) { | |
1845 | array[k++] = p; | |
1846 | array[k++] = json_variant_by_index(*v, i + 1); | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | if (n == 0) | |
1851 | return 0; | |
1852 | ||
1853 | r = json_variant_new_object(&w, array, k); | |
1854 | if (r < 0) | |
1855 | return r; | |
1856 | ||
94600eeb LP |
1857 | json_variant_propagate_sensitive(*v, w); |
1858 | ||
f2ff34ff LP |
1859 | json_variant_unref(*v); |
1860 | *v = TAKE_PTR(w); | |
1861 | ||
1862 | return (int) n; | |
1863 | } | |
1864 | ||
78a41236 LP |
1865 | int json_variant_set_field(JsonVariant **v, const char *field, JsonVariant *value) { |
1866 | _cleanup_(json_variant_unrefp) JsonVariant *field_variant = NULL, *w = NULL; | |
1867 | _cleanup_free_ JsonVariant **array = NULL; | |
1868 | size_t i, k = 0; | |
1869 | int r; | |
1870 | ||
1871 | assert(v); | |
1872 | assert(field); | |
1873 | ||
1874 | if (json_variant_is_blank_object(*v)) { | |
1875 | array = new(JsonVariant*, 2); | |
1876 | if (!array) | |
1877 | return -ENOMEM; | |
1878 | ||
1879 | } else { | |
1880 | if (!json_variant_is_object(*v)) | |
1881 | return -EINVAL; | |
1882 | ||
1883 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1884 | JsonVariant *p; | |
1885 | ||
1886 | p = json_variant_by_index(*v, i); | |
1887 | if (!json_variant_is_string(p)) | |
1888 | return -EINVAL; | |
1889 | ||
1890 | if (streq(json_variant_string(p), field)) { | |
1891 | ||
1892 | if (!array) { | |
1893 | array = new(JsonVariant*, json_variant_elements(*v)); | |
1894 | if (!array) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | for (k = 0; k < i; k++) | |
1898 | array[k] = json_variant_by_index(*v, k); | |
1899 | } | |
1900 | ||
1901 | } else if (array) { | |
1902 | array[k++] = p; | |
1903 | array[k++] = json_variant_by_index(*v, i + 1); | |
1904 | } | |
1905 | } | |
1906 | ||
1907 | if (!array) { | |
1908 | array = new(JsonVariant*, json_variant_elements(*v) + 2); | |
1909 | if (!array) | |
1910 | return -ENOMEM; | |
1911 | ||
1912 | for (k = 0; k < json_variant_elements(*v); k++) | |
1913 | array[k] = json_variant_by_index(*v, k); | |
1914 | } | |
1915 | } | |
1916 | ||
1917 | r = json_variant_new_string(&field_variant, field); | |
1918 | if (r < 0) | |
1919 | return r; | |
1920 | ||
1921 | array[k++] = field_variant; | |
1922 | array[k++] = value; | |
1923 | ||
1924 | r = json_variant_new_object(&w, array, k); | |
1925 | if (r < 0) | |
1926 | return r; | |
1927 | ||
94600eeb LP |
1928 | json_variant_propagate_sensitive(*v, w); |
1929 | ||
78a41236 LP |
1930 | json_variant_unref(*v); |
1931 | *v = TAKE_PTR(w); | |
1932 | ||
1933 | return 1; | |
1934 | } | |
1935 | ||
15f1fb3e LP |
1936 | int json_variant_set_field_string(JsonVariant **v, const char *field, const char *value) { |
1937 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1938 | int r; | |
1939 | ||
1940 | r = json_variant_new_string(&m, value); | |
1941 | if (r < 0) | |
1942 | return r; | |
1943 | ||
1944 | return json_variant_set_field(v, field, m); | |
1945 | } | |
1946 | ||
a832b08e LP |
1947 | int json_variant_set_field_integer(JsonVariant **v, const char *field, intmax_t i) { |
1948 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1949 | int r; | |
1950 | ||
1951 | r = json_variant_new_integer(&m, i); | |
1952 | if (r < 0) | |
1953 | return r; | |
1954 | ||
1955 | return json_variant_set_field(v, field, m); | |
1956 | } | |
1957 | ||
15f1fb3e LP |
1958 | int json_variant_set_field_unsigned(JsonVariant **v, const char *field, uintmax_t u) { |
1959 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1960 | int r; | |
1961 | ||
1962 | r = json_variant_new_unsigned(&m, u); | |
1963 | if (r < 0) | |
1964 | return r; | |
1965 | ||
1966 | return json_variant_set_field(v, field, m); | |
1967 | } | |
1968 | ||
a832b08e LP |
1969 | int json_variant_set_field_boolean(JsonVariant **v, const char *field, bool b) { |
1970 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1971 | int r; | |
1972 | ||
1973 | r = json_variant_new_boolean(&m, b); | |
1974 | if (r < 0) | |
1975 | return r; | |
1976 | ||
1977 | return json_variant_set_field(v, field, m); | |
1978 | } | |
1979 | ||
0b9481cf LP |
1980 | int json_variant_set_field_strv(JsonVariant **v, const char *field, char **l) { |
1981 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1982 | int r; | |
1983 | ||
1984 | r = json_variant_new_array_strv(&m, l); | |
1985 | if (r < 0) | |
1986 | return r; | |
1987 | ||
1988 | return json_variant_set_field(v, field, m); | |
1989 | } | |
1990 | ||
ca409a59 LP |
1991 | int json_variant_merge(JsonVariant **v, JsonVariant *m) { |
1992 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
1993 | _cleanup_free_ JsonVariant **array = NULL; | |
1994 | size_t v_elements, m_elements, i, k; | |
1995 | bool v_blank, m_blank; | |
1996 | int r; | |
1997 | ||
1998 | m = json_variant_dereference(m); | |
1999 | ||
2000 | v_blank = json_variant_is_blank_object(*v); | |
2001 | m_blank = json_variant_is_blank_object(m); | |
2002 | ||
2003 | if (!v_blank && !json_variant_is_object(*v)) | |
2004 | return -EINVAL; | |
2005 | if (!m_blank && !json_variant_is_object(m)) | |
2006 | return -EINVAL; | |
2007 | ||
2008 | if (m_blank) | |
2009 | return 0; /* nothing to do */ | |
2010 | ||
2011 | if (v_blank) { | |
2012 | json_variant_unref(*v); | |
2013 | *v = json_variant_ref(m); | |
2014 | return 1; | |
2015 | } | |
2016 | ||
2017 | v_elements = json_variant_elements(*v); | |
2018 | m_elements = json_variant_elements(m); | |
2019 | if (v_elements > SIZE_MAX - m_elements) /* overflow check */ | |
2020 | return -ENOMEM; | |
2021 | ||
2022 | array = new(JsonVariant*, v_elements + m_elements); | |
2023 | if (!array) | |
2024 | return -ENOMEM; | |
2025 | ||
2026 | k = 0; | |
2027 | for (i = 0; i < v_elements; i += 2) { | |
2028 | JsonVariant *u; | |
2029 | ||
2030 | u = json_variant_by_index(*v, i); | |
2031 | if (!json_variant_is_string(u)) | |
2032 | return -EINVAL; | |
2033 | ||
2034 | if (json_variant_by_key(m, json_variant_string(u))) | |
2035 | continue; /* skip if exists in second variant */ | |
2036 | ||
2037 | array[k++] = u; | |
2038 | array[k++] = json_variant_by_index(*v, i + 1); | |
2039 | } | |
2040 | ||
2041 | for (i = 0; i < m_elements; i++) | |
2042 | array[k++] = json_variant_by_index(m, i); | |
2043 | ||
2044 | r = json_variant_new_object(&w, array, k); | |
2045 | if (r < 0) | |
2046 | return r; | |
2047 | ||
94600eeb LP |
2048 | json_variant_propagate_sensitive(*v, w); |
2049 | json_variant_propagate_sensitive(m, w); | |
2050 | ||
ca409a59 LP |
2051 | json_variant_unref(*v); |
2052 | *v = TAKE_PTR(w); | |
2053 | ||
2054 | return 1; | |
2055 | } | |
2056 | ||
21e21511 LP |
2057 | int json_variant_append_array(JsonVariant **v, JsonVariant *element) { |
2058 | _cleanup_(json_variant_unrefp) JsonVariant *nv = NULL; | |
2059 | bool blank; | |
2060 | int r; | |
2061 | ||
2062 | assert(v); | |
2063 | assert(element); | |
2064 | ||
2065 | ||
2066 | if (!*v || json_variant_is_null(*v)) | |
2067 | blank = true; | |
2068 | else if (!json_variant_is_array(*v)) | |
2069 | return -EINVAL; | |
2070 | else | |
2071 | blank = json_variant_elements(*v) == 0; | |
2072 | ||
2073 | if (blank) | |
2074 | r = json_variant_new_array(&nv, (JsonVariant*[]) { element }, 1); | |
2075 | else { | |
2076 | _cleanup_free_ JsonVariant **array = NULL; | |
2077 | size_t i; | |
2078 | ||
2079 | array = new(JsonVariant*, json_variant_elements(*v) + 1); | |
2080 | if (!array) | |
2081 | return -ENOMEM; | |
2082 | ||
2083 | for (i = 0; i < json_variant_elements(*v); i++) | |
2084 | array[i] = json_variant_by_index(*v, i); | |
2085 | ||
2086 | array[i] = element; | |
2087 | ||
2088 | r = json_variant_new_array(&nv, array, i + 1); | |
2089 | } | |
21e21511 LP |
2090 | if (r < 0) |
2091 | return r; | |
2092 | ||
94600eeb LP |
2093 | json_variant_propagate_sensitive(*v, nv); |
2094 | ||
21e21511 LP |
2095 | json_variant_unref(*v); |
2096 | *v = TAKE_PTR(nv); | |
2097 | ||
2098 | return 0; | |
2099 | } | |
2100 | ||
22f14d6b LP |
2101 | int json_variant_strv(JsonVariant *v, char ***ret) { |
2102 | char **l = NULL; | |
2103 | size_t n, i; | |
2104 | bool sensitive; | |
2105 | int r; | |
2106 | ||
2107 | assert(ret); | |
2108 | ||
2109 | if (!v || json_variant_is_null(v)) { | |
2110 | l = new0(char*, 1); | |
2111 | if (!l) | |
2112 | return -ENOMEM; | |
2113 | ||
2114 | *ret = l; | |
2115 | return 0; | |
2116 | } | |
2117 | ||
2118 | if (!json_variant_is_array(v)) | |
2119 | return -EINVAL; | |
2120 | ||
2121 | sensitive = v->sensitive; | |
2122 | ||
2123 | n = json_variant_elements(v); | |
2124 | l = new(char*, n+1); | |
2125 | if (!l) | |
2126 | return -ENOMEM; | |
2127 | ||
2128 | for (i = 0; i < n; i++) { | |
2129 | JsonVariant *e; | |
2130 | ||
2131 | assert_se(e = json_variant_by_index(v, i)); | |
2132 | sensitive = sensitive || e->sensitive; | |
2133 | ||
2134 | if (!json_variant_is_string(e)) { | |
2135 | l[i] = NULL; | |
2136 | r = -EINVAL; | |
2137 | goto fail; | |
2138 | } | |
2139 | ||
2140 | l[i] = strdup(json_variant_string(e)); | |
2141 | if (!l[i]) { | |
2142 | r = -ENOMEM; | |
2143 | goto fail; | |
2144 | } | |
2145 | } | |
2146 | ||
2147 | l[i] = NULL; | |
2148 | *ret = TAKE_PTR(l); | |
2149 | ||
2150 | return 0; | |
2151 | ||
2152 | fail: | |
2153 | if (sensitive) | |
2154 | strv_free_erase(l); | |
2155 | else | |
2156 | strv_free(l); | |
2157 | ||
2158 | return r; | |
2159 | } | |
2160 | ||
cd0b6c53 LP |
2161 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { |
2162 | JsonVariantType t; | |
2163 | JsonVariant *c; | |
2164 | JsonValue value; | |
2165 | const void *source; | |
2166 | size_t k; | |
2167 | ||
2168 | assert(nv); | |
2169 | assert(v); | |
2170 | ||
2171 | /* Let's copy the simple types literally, and the larger types by references */ | |
2172 | t = json_variant_type(v); | |
2173 | switch (t) { | |
2174 | case JSON_VARIANT_INTEGER: | |
2175 | k = sizeof(intmax_t); | |
2176 | value.integer = json_variant_integer(v); | |
2177 | source = &value; | |
2178 | break; | |
2179 | ||
2180 | case JSON_VARIANT_UNSIGNED: | |
2181 | k = sizeof(uintmax_t); | |
2182 | value.unsig = json_variant_unsigned(v); | |
2183 | source = &value; | |
2184 | break; | |
2185 | ||
2186 | case JSON_VARIANT_REAL: | |
2187 | k = sizeof(long double); | |
2188 | value.real = json_variant_real(v); | |
2189 | source = &value; | |
2190 | break; | |
2191 | ||
2192 | case JSON_VARIANT_BOOLEAN: | |
2193 | k = sizeof(bool); | |
2194 | value.boolean = json_variant_boolean(v); | |
2195 | source = &value; | |
2196 | break; | |
2197 | ||
2198 | case JSON_VARIANT_NULL: | |
2199 | k = 0; | |
2200 | source = NULL; | |
2201 | break; | |
2202 | ||
2203 | case JSON_VARIANT_STRING: | |
2204 | source = json_variant_string(v); | |
2205 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
2206 | if (k <= INLINE_STRING_MAX) { | |
2207 | k ++; | |
2208 | break; | |
2209 | } | |
2210 | ||
2211 | _fallthrough_; | |
2212 | ||
2213 | default: | |
2214 | /* Everything else copy by reference */ | |
2215 | ||
2eb1c198 LP |
2216 | c = malloc0(MAX(sizeof(JsonVariant), |
2217 | offsetof(JsonVariant, reference) + sizeof(JsonVariant*))); | |
cd0b6c53 LP |
2218 | if (!c) |
2219 | return -ENOMEM; | |
2220 | ||
2221 | c->n_ref = 1; | |
2222 | c->type = t; | |
2223 | c->is_reference = true; | |
b7fc90a2 | 2224 | c->reference = json_variant_ref(json_variant_formalize(v)); |
cd0b6c53 LP |
2225 | |
2226 | *nv = c; | |
2227 | return 0; | |
2228 | } | |
2229 | ||
2eb1c198 LP |
2230 | c = malloc0(MAX(sizeof(JsonVariant), |
2231 | offsetof(JsonVariant, value) + k)); | |
cd0b6c53 LP |
2232 | if (!c) |
2233 | return -ENOMEM; | |
2234 | ||
2235 | c->n_ref = 1; | |
2236 | c->type = t; | |
2237 | ||
2238 | memcpy_safe(&c->value, source, k); | |
2239 | ||
94600eeb LP |
2240 | json_variant_propagate_sensitive(v, c); |
2241 | ||
cd0b6c53 LP |
2242 | *nv = c; |
2243 | return 0; | |
2244 | } | |
2245 | ||
2246 | static bool json_single_ref(JsonVariant *v) { | |
2247 | ||
2248 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
2249 | ||
d520d519 | 2250 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
2251 | return false; |
2252 | ||
2253 | if (v->is_embedded) | |
2254 | return json_single_ref(v->parent); | |
2255 | ||
2256 | assert(v->n_ref > 0); | |
2257 | return v->n_ref == 1; | |
2258 | } | |
2259 | ||
2260 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
2261 | JsonVariant *w; | |
2262 | int r; | |
2263 | ||
2264 | assert(v); | |
2265 | ||
2266 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
2267 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
2268 | ||
2269 | if (!*v) | |
2270 | return 0; | |
2271 | ||
2272 | if (source && line > source->max_line) | |
2273 | source->max_line = line; | |
2274 | if (source && column > source->max_column) | |
2275 | source->max_column = column; | |
2276 | ||
d520d519 | 2277 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
2278 | |
2279 | if (!source && line == 0 && column == 0) | |
2280 | return 0; | |
2281 | ||
2282 | } else { | |
2283 | if (json_source_equal((*v)->source, source) && | |
2284 | (*v)->line == line && | |
2285 | (*v)->column == column) | |
2286 | return 0; | |
2287 | ||
2288 | if (json_single_ref(*v)) { /* Sole reference? */ | |
2289 | json_source_unref((*v)->source); | |
2290 | (*v)->source = json_source_ref(source); | |
2291 | (*v)->line = line; | |
2292 | (*v)->column = column; | |
2293 | return 1; | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | r = json_variant_copy(&w, *v); | |
2298 | if (r < 0) | |
2299 | return r; | |
2300 | ||
d520d519 | 2301 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
2302 | assert(!w->is_embedded); |
2303 | assert(w->n_ref == 1); | |
2304 | assert(!w->source); | |
2305 | ||
2306 | w->source = json_source_ref(source); | |
2307 | w->line = line; | |
2308 | w->column = column; | |
2309 | ||
2310 | json_variant_unref(*v); | |
2311 | *v = w; | |
2312 | ||
2313 | return 1; | |
2314 | } | |
2315 | ||
2316 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
2317 | assert(line); | |
2318 | assert(column); | |
2319 | assert(s || n == 0); | |
2320 | ||
2321 | while (n > 0) { | |
cd0b6c53 LP |
2322 | if (*s == '\n') { |
2323 | (*line)++; | |
2324 | *column = 1; | |
df7f9e0b | 2325 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
2326 | (*column)++; |
2327 | else { | |
2328 | int w; | |
2329 | ||
92e068b4 | 2330 | w = utf8_encoded_valid_unichar(s, n); |
cd0b6c53 LP |
2331 | if (w < 0) /* count invalid unichars as normal characters */ |
2332 | w = 1; | |
2333 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
2334 | w = (int) n; | |
2335 | ||
2336 | (*column)++; | |
2337 | ||
2338 | s += w; | |
2339 | n -= w; | |
2340 | continue; | |
2341 | } | |
2342 | ||
2343 | s++; | |
2344 | n--; | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
2349 | int aa, bb, cc, dd; | |
2350 | uint16_t x; | |
2351 | ||
2352 | assert(c); | |
2353 | assert(ret); | |
2354 | ||
2355 | aa = unhexchar(c[0]); | |
2356 | if (aa < 0) | |
2357 | return -EINVAL; | |
2358 | ||
2359 | bb = unhexchar(c[1]); | |
2360 | if (bb < 0) | |
2361 | return -EINVAL; | |
2362 | ||
2363 | cc = unhexchar(c[2]); | |
2364 | if (cc < 0) | |
2365 | return -EINVAL; | |
2366 | ||
2367 | dd = unhexchar(c[3]); | |
2368 | if (dd < 0) | |
2369 | return -EINVAL; | |
2370 | ||
2371 | x = ((uint16_t) aa << 12) | | |
2372 | ((uint16_t) bb << 8) | | |
2373 | ((uint16_t) cc << 4) | | |
2374 | ((uint16_t) dd); | |
2375 | ||
2376 | if (x <= 0) | |
2377 | return -EINVAL; | |
2378 | ||
2379 | *ret = x; | |
2380 | ||
2381 | return 0; | |
2382 | } | |
2383 | ||
2384 | static int json_parse_string(const char **p, char **ret) { | |
2385 | _cleanup_free_ char *s = NULL; | |
2386 | size_t n = 0, allocated = 0; | |
2387 | const char *c; | |
2388 | ||
2389 | assert(p); | |
2390 | assert(*p); | |
2391 | assert(ret); | |
2392 | ||
2393 | c = *p; | |
2394 | ||
2395 | if (*c != '"') | |
2396 | return -EINVAL; | |
2397 | ||
2398 | c++; | |
2399 | ||
2400 | for (;;) { | |
2401 | int len; | |
2402 | ||
2403 | /* Check for EOF */ | |
2404 | if (*c == 0) | |
2405 | return -EINVAL; | |
2406 | ||
2407 | /* Check for control characters 0x00..0x1f */ | |
2408 | if (*c > 0 && *c < ' ') | |
2409 | return -EINVAL; | |
2410 | ||
2411 | /* Check for control character 0x7f */ | |
2412 | if (*c == 0x7f) | |
2413 | return -EINVAL; | |
2414 | ||
2415 | if (*c == '"') { | |
2416 | if (!s) { | |
2417 | s = strdup(""); | |
2418 | if (!s) | |
2419 | return -ENOMEM; | |
2420 | } else | |
2421 | s[n] = 0; | |
2422 | ||
2423 | *p = c + 1; | |
2424 | ||
490c5a37 | 2425 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
2426 | return JSON_TOKEN_STRING; |
2427 | } | |
2428 | ||
2429 | if (*c == '\\') { | |
2430 | char ch = 0; | |
2431 | c++; | |
2432 | ||
2433 | if (*c == 0) | |
2434 | return -EINVAL; | |
2435 | ||
2436 | if (IN_SET(*c, '"', '\\', '/')) | |
2437 | ch = *c; | |
2438 | else if (*c == 'b') | |
2439 | ch = '\b'; | |
2440 | else if (*c == 'f') | |
2441 | ch = '\f'; | |
2442 | else if (*c == 'n') | |
2443 | ch = '\n'; | |
2444 | else if (*c == 'r') | |
2445 | ch = '\r'; | |
2446 | else if (*c == 't') | |
2447 | ch = '\t'; | |
2448 | else if (*c == 'u') { | |
2449 | char16_t x; | |
2450 | int r; | |
2451 | ||
2452 | r = unhex_ucs2(c + 1, &x); | |
2453 | if (r < 0) | |
2454 | return r; | |
2455 | ||
2456 | c += 5; | |
2457 | ||
2458 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
2459 | return -ENOMEM; | |
2460 | ||
2461 | if (!utf16_is_surrogate(x)) | |
2462 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
2463 | else if (utf16_is_trailing_surrogate(x)) | |
2464 | return -EINVAL; | |
2465 | else { | |
2466 | char16_t y; | |
2467 | ||
2468 | if (c[0] != '\\' || c[1] != 'u') | |
2469 | return -EINVAL; | |
2470 | ||
2471 | r = unhex_ucs2(c + 2, &y); | |
2472 | if (r < 0) | |
2473 | return r; | |
2474 | ||
2475 | c += 6; | |
2476 | ||
2477 | if (!utf16_is_trailing_surrogate(y)) | |
2478 | return -EINVAL; | |
2479 | ||
2480 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
2481 | } | |
2482 | ||
2483 | continue; | |
2484 | } else | |
2485 | return -EINVAL; | |
2486 | ||
2487 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
2488 | return -ENOMEM; | |
2489 | ||
2490 | s[n++] = ch; | |
2491 | c ++; | |
2492 | continue; | |
2493 | } | |
2494 | ||
92e068b4 | 2495 | len = utf8_encoded_valid_unichar(c, (size_t) -1); |
cd0b6c53 LP |
2496 | if (len < 0) |
2497 | return len; | |
2498 | ||
2499 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
2500 | return -ENOMEM; | |
2501 | ||
2502 | memcpy(s + n, c, len); | |
2503 | n += len; | |
2504 | c += len; | |
2505 | } | |
2506 | } | |
2507 | ||
2508 | static int json_parse_number(const char **p, JsonValue *ret) { | |
2509 | bool negative = false, exponent_negative = false, is_real = false; | |
2510 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
2511 | intmax_t i = 0; | |
2512 | uintmax_t u = 0; | |
2513 | const char *c; | |
2514 | ||
2515 | assert(p); | |
2516 | assert(*p); | |
2517 | assert(ret); | |
2518 | ||
2519 | c = *p; | |
2520 | ||
2521 | if (*c == '-') { | |
2522 | negative = true; | |
2523 | c++; | |
2524 | } | |
2525 | ||
2526 | if (*c == '0') | |
2527 | c++; | |
2528 | else { | |
2529 | if (!strchr("123456789", *c) || *c == 0) | |
2530 | return -EINVAL; | |
2531 | ||
2532 | do { | |
2533 | if (!is_real) { | |
2534 | if (negative) { | |
2535 | ||
2536 | if (i < INTMAX_MIN / 10) /* overflow */ | |
2537 | is_real = true; | |
2538 | else { | |
2539 | intmax_t t = 10 * i; | |
2540 | ||
2541 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
2542 | is_real = true; | |
2543 | else | |
2544 | i = t - (*c - '0'); | |
2545 | } | |
2546 | } else { | |
2547 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
2548 | is_real = true; | |
2549 | else { | |
2550 | uintmax_t t = 10 * u; | |
2551 | ||
2552 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
2553 | is_real = true; | |
2554 | else | |
2555 | u = t + (*c - '0'); | |
2556 | } | |
2557 | } | |
2558 | } | |
2559 | ||
2560 | x = 10.0 * x + (*c - '0'); | |
2561 | ||
2562 | c++; | |
2563 | } while (strchr("0123456789", *c) && *c != 0); | |
2564 | } | |
2565 | ||
2566 | if (*c == '.') { | |
2567 | is_real = true; | |
2568 | c++; | |
2569 | ||
2570 | if (!strchr("0123456789", *c) || *c == 0) | |
2571 | return -EINVAL; | |
2572 | ||
2573 | do { | |
2574 | y = 10.0 * y + (*c - '0'); | |
2575 | shift = 10.0 * shift; | |
2576 | c++; | |
2577 | } while (strchr("0123456789", *c) && *c != 0); | |
2578 | } | |
2579 | ||
490c5a37 | 2580 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2581 | is_real = true; |
2582 | c++; | |
2583 | ||
2584 | if (*c == '-') { | |
2585 | exponent_negative = true; | |
2586 | c++; | |
2587 | } else if (*c == '+') | |
2588 | c++; | |
2589 | ||
2590 | if (!strchr("0123456789", *c) || *c == 0) | |
2591 | return -EINVAL; | |
2592 | ||
2593 | do { | |
2594 | exponent = 10.0 * exponent + (*c - '0'); | |
2595 | c++; | |
2596 | } while (strchr("0123456789", *c) && *c != 0); | |
2597 | } | |
2598 | ||
2599 | *p = c; | |
2600 | ||
2601 | if (is_real) { | |
2602 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2603 | return JSON_TOKEN_REAL; | |
2604 | } else if (negative) { | |
2605 | ret->integer = i; | |
2606 | return JSON_TOKEN_INTEGER; | |
2607 | } else { | |
2608 | ret->unsig = u; | |
2609 | return JSON_TOKEN_UNSIGNED; | |
2610 | } | |
2611 | } | |
2612 | ||
2613 | int json_tokenize( | |
2614 | const char **p, | |
2615 | char **ret_string, | |
2616 | JsonValue *ret_value, | |
2617 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2618 | unsigned *ret_column, | |
2619 | void **state, | |
2620 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2621 | unsigned *column) { | |
2622 | ||
2623 | unsigned start_line, start_column; | |
2624 | const char *start, *c; | |
2625 | size_t n; | |
2626 | int t, r; | |
2627 | ||
2628 | enum { | |
2629 | STATE_NULL, | |
2630 | STATE_VALUE, | |
2631 | STATE_VALUE_POST, | |
2632 | }; | |
2633 | ||
2634 | assert(p); | |
2635 | assert(*p); | |
2636 | assert(ret_string); | |
2637 | assert(ret_value); | |
2638 | assert(ret_line); | |
2639 | assert(ret_column); | |
2640 | assert(line); | |
2641 | assert(column); | |
2642 | assert(state); | |
2643 | ||
2644 | t = PTR_TO_INT(*state); | |
2645 | if (t == STATE_NULL) { | |
2646 | *line = 1; | |
2647 | *column = 1; | |
2648 | t = STATE_VALUE; | |
2649 | } | |
2650 | ||
2651 | /* Skip over the whitespace */ | |
2652 | n = strspn(*p, WHITESPACE); | |
2653 | inc_lines_columns(line, column, *p, n); | |
2654 | c = *p + n; | |
2655 | ||
2656 | /* Remember where we started processing this token */ | |
2657 | start = c; | |
2658 | start_line = *line; | |
2659 | start_column = *column; | |
2660 | ||
2661 | if (*c == 0) { | |
2662 | *ret_string = NULL; | |
2663 | *ret_value = JSON_VALUE_NULL; | |
2664 | r = JSON_TOKEN_END; | |
2665 | goto finish; | |
2666 | } | |
2667 | ||
2668 | switch (t) { | |
2669 | ||
2670 | case STATE_VALUE: | |
2671 | ||
2672 | if (*c == '{') { | |
2673 | c++; | |
2674 | *state = INT_TO_PTR(STATE_VALUE); | |
2675 | r = JSON_TOKEN_OBJECT_OPEN; | |
2676 | goto null_return; | |
2677 | ||
2678 | } else if (*c == '}') { | |
2679 | c++; | |
2680 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2681 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2682 | goto null_return; | |
2683 | ||
2684 | } else if (*c == '[') { | |
2685 | c++; | |
2686 | *state = INT_TO_PTR(STATE_VALUE); | |
2687 | r = JSON_TOKEN_ARRAY_OPEN; | |
2688 | goto null_return; | |
2689 | ||
2690 | } else if (*c == ']') { | |
2691 | c++; | |
2692 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2693 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2694 | goto null_return; | |
2695 | ||
2696 | } else if (*c == '"') { | |
2697 | ||
2698 | r = json_parse_string(&c, ret_string); | |
2699 | if (r < 0) | |
2700 | return r; | |
2701 | ||
2702 | *ret_value = JSON_VALUE_NULL; | |
2703 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2704 | goto finish; | |
2705 | ||
2706 | } else if (strchr("-0123456789", *c)) { | |
2707 | ||
2708 | r = json_parse_number(&c, ret_value); | |
2709 | if (r < 0) | |
2710 | return r; | |
2711 | ||
2712 | *ret_string = NULL; | |
2713 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2714 | goto finish; | |
2715 | ||
2716 | } else if (startswith(c, "true")) { | |
2717 | *ret_string = NULL; | |
2718 | ret_value->boolean = true; | |
2719 | c += 4; | |
2720 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2721 | r = JSON_TOKEN_BOOLEAN; | |
2722 | goto finish; | |
2723 | ||
2724 | } else if (startswith(c, "false")) { | |
2725 | *ret_string = NULL; | |
2726 | ret_value->boolean = false; | |
2727 | c += 5; | |
2728 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2729 | r = JSON_TOKEN_BOOLEAN; | |
2730 | goto finish; | |
2731 | ||
2732 | } else if (startswith(c, "null")) { | |
2733 | *ret_string = NULL; | |
2734 | *ret_value = JSON_VALUE_NULL; | |
2735 | c += 4; | |
2736 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2737 | r = JSON_TOKEN_NULL; | |
2738 | goto finish; | |
2739 | ||
2740 | } | |
2741 | ||
2742 | return -EINVAL; | |
2743 | ||
2744 | case STATE_VALUE_POST: | |
2745 | ||
2746 | if (*c == ':') { | |
2747 | c++; | |
2748 | *state = INT_TO_PTR(STATE_VALUE); | |
2749 | r = JSON_TOKEN_COLON; | |
2750 | goto null_return; | |
2751 | ||
2752 | } else if (*c == ',') { | |
2753 | c++; | |
2754 | *state = INT_TO_PTR(STATE_VALUE); | |
2755 | r = JSON_TOKEN_COMMA; | |
2756 | goto null_return; | |
2757 | ||
2758 | } else if (*c == '}') { | |
2759 | c++; | |
2760 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2761 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2762 | goto null_return; | |
2763 | ||
2764 | } else if (*c == ']') { | |
2765 | c++; | |
2766 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2767 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2768 | goto null_return; | |
2769 | } | |
2770 | ||
2771 | return -EINVAL; | |
2772 | ||
2773 | default: | |
2774 | assert_not_reached("Unexpected tokenizer state"); | |
2775 | } | |
2776 | ||
2777 | null_return: | |
2778 | *ret_string = NULL; | |
2779 | *ret_value = JSON_VALUE_NULL; | |
2780 | ||
2781 | finish: | |
2782 | inc_lines_columns(line, column, start, c - start); | |
2783 | *p = c; | |
2784 | ||
2785 | *ret_line = start_line; | |
2786 | *ret_column = start_column; | |
2787 | ||
2788 | return r; | |
2789 | } | |
2790 | ||
2791 | typedef enum JsonExpect { | |
2792 | /* The following values are used by json_parse() */ | |
2793 | EXPECT_TOPLEVEL, | |
2794 | EXPECT_END, | |
2795 | EXPECT_OBJECT_FIRST_KEY, | |
2796 | EXPECT_OBJECT_NEXT_KEY, | |
2797 | EXPECT_OBJECT_COLON, | |
2798 | EXPECT_OBJECT_VALUE, | |
2799 | EXPECT_OBJECT_COMMA, | |
2800 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2801 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2802 | EXPECT_ARRAY_COMMA, | |
2803 | ||
2804 | /* And these are used by json_build() */ | |
2805 | EXPECT_ARRAY_ELEMENT, | |
2806 | EXPECT_OBJECT_KEY, | |
2807 | } JsonExpect; | |
2808 | ||
2809 | typedef struct JsonStack { | |
2810 | JsonExpect expect; | |
2811 | JsonVariant **elements; | |
2812 | size_t n_elements, n_elements_allocated; | |
2813 | unsigned line_before; | |
2814 | unsigned column_before; | |
319a4f27 | 2815 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2816 | } JsonStack; |
2817 | ||
2818 | static void json_stack_release(JsonStack *s) { | |
2819 | assert(s); | |
2820 | ||
2821 | json_variant_unref_many(s->elements, s->n_elements); | |
2822 | s->elements = mfree(s->elements); | |
2823 | } | |
2824 | ||
2825 | static int json_parse_internal( | |
2826 | const char **input, | |
2827 | JsonSource *source, | |
d642f640 | 2828 | JsonParseFlags flags, |
cd0b6c53 LP |
2829 | JsonVariant **ret, |
2830 | unsigned *line, | |
2831 | unsigned *column, | |
2832 | bool continue_end) { | |
2833 | ||
2834 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2835 | unsigned line_buffer = 0, column_buffer = 0; | |
2836 | void *tokenizer_state = NULL; | |
2837 | JsonStack *stack = NULL; | |
2838 | const char *p; | |
2839 | int r; | |
2840 | ||
2841 | assert_return(input, -EINVAL); | |
2842 | assert_return(ret, -EINVAL); | |
2843 | ||
2844 | p = *input; | |
2845 | ||
2846 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2847 | return -ENOMEM; | |
2848 | ||
2849 | stack[0] = (JsonStack) { | |
2850 | .expect = EXPECT_TOPLEVEL, | |
2851 | }; | |
2852 | ||
2853 | if (!line) | |
2854 | line = &line_buffer; | |
2855 | if (!column) | |
2856 | column = &column_buffer; | |
2857 | ||
2858 | for (;;) { | |
6980b04f | 2859 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
cd0b6c53 LP |
2860 | _cleanup_free_ char *string = NULL; |
2861 | unsigned line_token, column_token; | |
cd0b6c53 LP |
2862 | JsonStack *current; |
2863 | JsonValue value; | |
2864 | int token; | |
2865 | ||
2866 | assert(n_stack > 0); | |
2867 | current = stack + n_stack - 1; | |
2868 | ||
2869 | if (continue_end && current->expect == EXPECT_END) | |
2870 | goto done; | |
2871 | ||
2872 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2873 | if (token < 0) { | |
2874 | r = token; | |
2875 | goto finish; | |
2876 | } | |
2877 | ||
2878 | switch (token) { | |
2879 | ||
2880 | case JSON_TOKEN_END: | |
2881 | if (current->expect != EXPECT_END) { | |
2882 | r = -EINVAL; | |
2883 | goto finish; | |
2884 | } | |
2885 | ||
2886 | assert(current->n_elements == 1); | |
2887 | assert(n_stack == 1); | |
2888 | goto done; | |
2889 | ||
2890 | case JSON_TOKEN_COLON: | |
2891 | ||
2892 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2893 | r = -EINVAL; | |
2894 | goto finish; | |
2895 | } | |
2896 | ||
2897 | current->expect = EXPECT_OBJECT_VALUE; | |
2898 | break; | |
2899 | ||
2900 | case JSON_TOKEN_COMMA: | |
2901 | ||
2902 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2903 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2904 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2905 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2906 | else { | |
2907 | r = -EINVAL; | |
2908 | goto finish; | |
2909 | } | |
2910 | ||
2911 | break; | |
2912 | ||
2913 | case JSON_TOKEN_OBJECT_OPEN: | |
2914 | ||
2915 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2916 | r = -EINVAL; | |
2917 | goto finish; | |
2918 | } | |
2919 | ||
2920 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2921 | r = -ENOMEM; | |
2922 | goto finish; | |
2923 | } | |
2924 | current = stack + n_stack - 1; | |
2925 | ||
2926 | /* Prepare the expect for when we return from the child */ | |
2927 | if (current->expect == EXPECT_TOPLEVEL) | |
2928 | current->expect = EXPECT_END; | |
2929 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2930 | current->expect = EXPECT_OBJECT_COMMA; | |
2931 | else { | |
2932 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2933 | current->expect = EXPECT_ARRAY_COMMA; | |
2934 | } | |
2935 | ||
2936 | stack[n_stack++] = (JsonStack) { | |
2937 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2938 | .line_before = line_token, | |
2939 | .column_before = column_token, | |
2940 | }; | |
2941 | ||
2942 | current = stack + n_stack - 1; | |
2943 | break; | |
2944 | ||
2945 | case JSON_TOKEN_OBJECT_CLOSE: | |
2946 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2947 | r = -EINVAL; | |
2948 | goto finish; | |
2949 | } | |
2950 | ||
2951 | assert(n_stack > 1); | |
2952 | ||
2953 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2954 | if (r < 0) | |
2955 | goto finish; | |
2956 | ||
2957 | line_token = current->line_before; | |
2958 | column_token = current->column_before; | |
2959 | ||
2960 | json_stack_release(current); | |
2961 | n_stack--, current--; | |
2962 | ||
2963 | break; | |
2964 | ||
2965 | case JSON_TOKEN_ARRAY_OPEN: | |
2966 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2967 | r = -EINVAL; | |
2968 | goto finish; | |
2969 | } | |
2970 | ||
2971 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2972 | r = -ENOMEM; | |
2973 | goto finish; | |
2974 | } | |
2975 | current = stack + n_stack - 1; | |
2976 | ||
2977 | /* Prepare the expect for when we return from the child */ | |
2978 | if (current->expect == EXPECT_TOPLEVEL) | |
2979 | current->expect = EXPECT_END; | |
2980 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2981 | current->expect = EXPECT_OBJECT_COMMA; | |
2982 | else { | |
2983 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2984 | current->expect = EXPECT_ARRAY_COMMA; | |
2985 | } | |
2986 | ||
2987 | stack[n_stack++] = (JsonStack) { | |
2988 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2989 | .line_before = line_token, | |
2990 | .column_before = column_token, | |
2991 | }; | |
2992 | ||
2993 | break; | |
2994 | ||
2995 | case JSON_TOKEN_ARRAY_CLOSE: | |
2996 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2997 | r = -EINVAL; | |
2998 | goto finish; | |
2999 | } | |
3000 | ||
3001 | assert(n_stack > 1); | |
3002 | ||
3003 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
3004 | if (r < 0) | |
3005 | goto finish; | |
3006 | ||
3007 | line_token = current->line_before; | |
3008 | column_token = current->column_before; | |
3009 | ||
3010 | json_stack_release(current); | |
3011 | n_stack--, current--; | |
3012 | break; | |
3013 | ||
3014 | case JSON_TOKEN_STRING: | |
3015 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3016 | r = -EINVAL; | |
3017 | goto finish; | |
3018 | } | |
3019 | ||
3020 | r = json_variant_new_string(&add, string); | |
3021 | if (r < 0) | |
3022 | goto finish; | |
3023 | ||
3024 | if (current->expect == EXPECT_TOPLEVEL) | |
3025 | current->expect = EXPECT_END; | |
3026 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
3027 | current->expect = EXPECT_OBJECT_COLON; | |
3028 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3029 | current->expect = EXPECT_OBJECT_COMMA; | |
3030 | else { | |
3031 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3032 | current->expect = EXPECT_ARRAY_COMMA; | |
3033 | } | |
3034 | ||
3035 | break; | |
3036 | ||
3037 | case JSON_TOKEN_REAL: | |
3038 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3039 | r = -EINVAL; | |
3040 | goto finish; | |
3041 | } | |
3042 | ||
3043 | r = json_variant_new_real(&add, value.real); | |
3044 | if (r < 0) | |
3045 | goto finish; | |
3046 | ||
3047 | if (current->expect == EXPECT_TOPLEVEL) | |
3048 | current->expect = EXPECT_END; | |
3049 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3050 | current->expect = EXPECT_OBJECT_COMMA; | |
3051 | else { | |
3052 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3053 | current->expect = EXPECT_ARRAY_COMMA; | |
3054 | } | |
3055 | ||
3056 | break; | |
3057 | ||
3058 | case JSON_TOKEN_INTEGER: | |
3059 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3060 | r = -EINVAL; | |
3061 | goto finish; | |
3062 | } | |
3063 | ||
3064 | r = json_variant_new_integer(&add, value.integer); | |
3065 | if (r < 0) | |
3066 | goto finish; | |
3067 | ||
3068 | if (current->expect == EXPECT_TOPLEVEL) | |
3069 | current->expect = EXPECT_END; | |
3070 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3071 | current->expect = EXPECT_OBJECT_COMMA; | |
3072 | else { | |
3073 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3074 | current->expect = EXPECT_ARRAY_COMMA; | |
3075 | } | |
3076 | ||
3077 | break; | |
3078 | ||
3079 | case JSON_TOKEN_UNSIGNED: | |
3080 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3081 | r = -EINVAL; | |
3082 | goto finish; | |
3083 | } | |
3084 | ||
3085 | r = json_variant_new_unsigned(&add, value.unsig); | |
3086 | if (r < 0) | |
3087 | goto finish; | |
3088 | ||
3089 | if (current->expect == EXPECT_TOPLEVEL) | |
3090 | current->expect = EXPECT_END; | |
3091 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3092 | current->expect = EXPECT_OBJECT_COMMA; | |
3093 | else { | |
3094 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3095 | current->expect = EXPECT_ARRAY_COMMA; | |
3096 | } | |
3097 | ||
3098 | break; | |
3099 | ||
3100 | case JSON_TOKEN_BOOLEAN: | |
3101 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3102 | r = -EINVAL; | |
3103 | goto finish; | |
3104 | } | |
3105 | ||
3106 | r = json_variant_new_boolean(&add, value.boolean); | |
3107 | if (r < 0) | |
3108 | goto finish; | |
3109 | ||
3110 | if (current->expect == EXPECT_TOPLEVEL) | |
3111 | current->expect = EXPECT_END; | |
3112 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3113 | current->expect = EXPECT_OBJECT_COMMA; | |
3114 | else { | |
3115 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3116 | current->expect = EXPECT_ARRAY_COMMA; | |
3117 | } | |
3118 | ||
3119 | break; | |
3120 | ||
3121 | case JSON_TOKEN_NULL: | |
3122 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3123 | r = -EINVAL; | |
3124 | goto finish; | |
3125 | } | |
3126 | ||
3127 | r = json_variant_new_null(&add); | |
3128 | if (r < 0) | |
3129 | goto finish; | |
3130 | ||
3131 | if (current->expect == EXPECT_TOPLEVEL) | |
3132 | current->expect = EXPECT_END; | |
3133 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3134 | current->expect = EXPECT_OBJECT_COMMA; | |
3135 | else { | |
3136 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3137 | current->expect = EXPECT_ARRAY_COMMA; | |
3138 | } | |
3139 | ||
3140 | break; | |
3141 | ||
3142 | default: | |
3143 | assert_not_reached("Unexpected token"); | |
3144 | } | |
3145 | ||
3146 | if (add) { | |
d642f640 LP |
3147 | /* If we are asked to make this parsed object sensitive, then let's apply this |
3148 | * immediately after allocating each variant, so that when we abort half-way | |
3149 | * everything we already allocated that is then freed is correctly marked. */ | |
3150 | if (FLAGS_SET(flags, JSON_PARSE_SENSITIVE)) | |
3151 | json_variant_sensitive(add); | |
3152 | ||
cd0b6c53 LP |
3153 | (void) json_variant_set_source(&add, source, line_token, column_token); |
3154 | ||
3155 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
3156 | r = -ENOMEM; | |
3157 | goto finish; | |
3158 | } | |
3159 | ||
6980b04f | 3160 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 LP |
3161 | } |
3162 | } | |
3163 | ||
3164 | done: | |
3165 | assert(n_stack == 1); | |
3166 | assert(stack[0].n_elements == 1); | |
3167 | ||
3168 | *ret = json_variant_ref(stack[0].elements[0]); | |
3169 | *input = p; | |
3170 | r = 0; | |
3171 | ||
3172 | finish: | |
3173 | for (i = 0; i < n_stack; i++) | |
3174 | json_stack_release(stack + i); | |
3175 | ||
3176 | free(stack); | |
3177 | ||
3178 | return r; | |
3179 | } | |
3180 | ||
d642f640 LP |
3181 | int json_parse(const char *input, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3182 | return json_parse_internal(&input, NULL, flags, ret, ret_line, ret_column, false); | |
cd0b6c53 LP |
3183 | } |
3184 | ||
d642f640 LP |
3185 | int json_parse_continue(const char **p, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3186 | return json_parse_internal(p, NULL, flags, ret, ret_line, ret_column, true); | |
cd0b6c53 LP |
3187 | } |
3188 | ||
d642f640 | 3189 | int json_parse_file_at(FILE *f, int dir_fd, const char *path, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
cd0b6c53 LP |
3190 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; |
3191 | _cleanup_free_ char *text = NULL; | |
3192 | const char *p; | |
3193 | int r; | |
3194 | ||
3195 | if (f) | |
3196 | r = read_full_stream(f, &text, NULL); | |
3197 | else if (path) | |
d3dcf4e3 | 3198 | r = read_full_file_full(dir_fd, path, 0, NULL, &text, NULL); |
cd0b6c53 LP |
3199 | else |
3200 | return -EINVAL; | |
3201 | if (r < 0) | |
3202 | return r; | |
3203 | ||
3204 | if (path) { | |
3205 | source = json_source_new(path); | |
3206 | if (!source) | |
3207 | return -ENOMEM; | |
3208 | } | |
3209 | ||
3210 | p = text; | |
d642f640 | 3211 | return json_parse_internal(&p, source, flags, ret, ret_line, ret_column, false); |
cd0b6c53 LP |
3212 | } |
3213 | ||
3214 | int json_buildv(JsonVariant **ret, va_list ap) { | |
3215 | JsonStack *stack = NULL; | |
3216 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
3217 | int r; | |
3218 | ||
3219 | assert_return(ret, -EINVAL); | |
3220 | ||
3221 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
3222 | return -ENOMEM; | |
3223 | ||
3224 | stack[0] = (JsonStack) { | |
3225 | .expect = EXPECT_TOPLEVEL, | |
3226 | }; | |
3227 | ||
3228 | for (;;) { | |
fcadf032 | 3229 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
3230 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
3231 | * have been added to the current variant */ | |
cd0b6c53 LP |
3232 | JsonStack *current; |
3233 | int command; | |
3234 | ||
3235 | assert(n_stack > 0); | |
3236 | current = stack + n_stack - 1; | |
3237 | ||
3238 | if (current->expect == EXPECT_END) | |
3239 | goto done; | |
3240 | ||
3241 | command = va_arg(ap, int); | |
3242 | ||
3243 | switch (command) { | |
3244 | ||
3245 | case _JSON_BUILD_STRING: { | |
3246 | const char *p; | |
3247 | ||
3248 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3249 | r = -EINVAL; | |
3250 | goto finish; | |
3251 | } | |
3252 | ||
3253 | p = va_arg(ap, const char *); | |
3254 | ||
319a4f27 LP |
3255 | if (current->n_suppress == 0) { |
3256 | r = json_variant_new_string(&add, p); | |
3257 | if (r < 0) | |
3258 | goto finish; | |
3259 | } | |
3260 | ||
3261 | n_subtract = 1; | |
cd0b6c53 LP |
3262 | |
3263 | if (current->expect == EXPECT_TOPLEVEL) | |
3264 | current->expect = EXPECT_END; | |
3265 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3266 | current->expect = EXPECT_OBJECT_KEY; | |
3267 | else | |
3268 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3269 | ||
3270 | break; | |
3271 | } | |
3272 | ||
3273 | case _JSON_BUILD_INTEGER: { | |
3274 | intmax_t j; | |
3275 | ||
3276 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3277 | r = -EINVAL; | |
3278 | goto finish; | |
3279 | } | |
3280 | ||
3281 | j = va_arg(ap, intmax_t); | |
3282 | ||
319a4f27 LP |
3283 | if (current->n_suppress == 0) { |
3284 | r = json_variant_new_integer(&add, j); | |
3285 | if (r < 0) | |
3286 | goto finish; | |
3287 | } | |
3288 | ||
3289 | n_subtract = 1; | |
cd0b6c53 LP |
3290 | |
3291 | if (current->expect == EXPECT_TOPLEVEL) | |
3292 | current->expect = EXPECT_END; | |
3293 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3294 | current->expect = EXPECT_OBJECT_KEY; | |
3295 | else | |
3296 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3297 | ||
3298 | break; | |
3299 | } | |
3300 | ||
3301 | case _JSON_BUILD_UNSIGNED: { | |
3302 | uintmax_t j; | |
3303 | ||
3304 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3305 | r = -EINVAL; | |
3306 | goto finish; | |
3307 | } | |
3308 | ||
3309 | j = va_arg(ap, uintmax_t); | |
3310 | ||
319a4f27 LP |
3311 | if (current->n_suppress == 0) { |
3312 | r = json_variant_new_unsigned(&add, j); | |
3313 | if (r < 0) | |
3314 | goto finish; | |
3315 | } | |
3316 | ||
3317 | n_subtract = 1; | |
cd0b6c53 LP |
3318 | |
3319 | if (current->expect == EXPECT_TOPLEVEL) | |
3320 | current->expect = EXPECT_END; | |
3321 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3322 | current->expect = EXPECT_OBJECT_KEY; | |
3323 | else | |
3324 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3325 | ||
3326 | break; | |
3327 | } | |
3328 | ||
3329 | case _JSON_BUILD_REAL: { | |
3330 | long double d; | |
3331 | ||
3332 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3333 | r = -EINVAL; | |
3334 | goto finish; | |
3335 | } | |
3336 | ||
3337 | d = va_arg(ap, long double); | |
3338 | ||
319a4f27 LP |
3339 | if (current->n_suppress == 0) { |
3340 | r = json_variant_new_real(&add, d); | |
3341 | if (r < 0) | |
3342 | goto finish; | |
3343 | } | |
3344 | ||
3345 | n_subtract = 1; | |
cd0b6c53 LP |
3346 | |
3347 | if (current->expect == EXPECT_TOPLEVEL) | |
3348 | current->expect = EXPECT_END; | |
3349 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3350 | current->expect = EXPECT_OBJECT_KEY; | |
3351 | else | |
3352 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3353 | ||
3354 | break; | |
3355 | } | |
3356 | ||
3357 | case _JSON_BUILD_BOOLEAN: { | |
3358 | bool b; | |
3359 | ||
3360 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3361 | r = -EINVAL; | |
3362 | goto finish; | |
3363 | } | |
3364 | ||
3365 | b = va_arg(ap, int); | |
3366 | ||
319a4f27 LP |
3367 | if (current->n_suppress == 0) { |
3368 | r = json_variant_new_boolean(&add, b); | |
3369 | if (r < 0) | |
3370 | goto finish; | |
3371 | } | |
3372 | ||
3373 | n_subtract = 1; | |
cd0b6c53 LP |
3374 | |
3375 | if (current->expect == EXPECT_TOPLEVEL) | |
3376 | current->expect = EXPECT_END; | |
3377 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3378 | current->expect = EXPECT_OBJECT_KEY; | |
3379 | else | |
3380 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3381 | ||
3382 | break; | |
3383 | } | |
3384 | ||
3385 | case _JSON_BUILD_NULL: | |
3386 | ||
3387 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3388 | r = -EINVAL; | |
3389 | goto finish; | |
3390 | } | |
3391 | ||
319a4f27 LP |
3392 | if (current->n_suppress == 0) { |
3393 | r = json_variant_new_null(&add); | |
3394 | if (r < 0) | |
3395 | goto finish; | |
3396 | } | |
3397 | ||
3398 | n_subtract = 1; | |
cd0b6c53 LP |
3399 | |
3400 | if (current->expect == EXPECT_TOPLEVEL) | |
3401 | current->expect = EXPECT_END; | |
3402 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3403 | current->expect = EXPECT_OBJECT_KEY; | |
3404 | else | |
3405 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3406 | ||
3407 | break; | |
3408 | ||
3409 | case _JSON_BUILD_VARIANT: | |
3410 | ||
3411 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3412 | r = -EINVAL; | |
3413 | goto finish; | |
3414 | } | |
3415 | ||
319a4f27 LP |
3416 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
3417 | * allocated anyway... */ | |
cd0b6c53 LP |
3418 | add = va_arg(ap, JsonVariant*); |
3419 | if (!add) | |
3420 | add = JSON_VARIANT_MAGIC_NULL; | |
3421 | else | |
3422 | json_variant_ref(add); | |
3423 | ||
319a4f27 LP |
3424 | n_subtract = 1; |
3425 | ||
cd0b6c53 LP |
3426 | if (current->expect == EXPECT_TOPLEVEL) |
3427 | current->expect = EXPECT_END; | |
3428 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3429 | current->expect = EXPECT_OBJECT_KEY; | |
3430 | else | |
3431 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3432 | ||
3433 | break; | |
3434 | ||
e4defdc4 LP |
3435 | case _JSON_BUILD_VARIANT_ARRAY: { |
3436 | JsonVariant **array; | |
3437 | size_t n; | |
3438 | ||
3439 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3440 | r = -EINVAL; | |
3441 | goto finish; | |
3442 | } | |
3443 | ||
3444 | array = va_arg(ap, JsonVariant**); | |
3445 | n = va_arg(ap, size_t); | |
3446 | ||
3447 | if (current->n_suppress == 0) { | |
3448 | r = json_variant_new_array(&add, array, n); | |
3449 | if (r < 0) | |
3450 | goto finish; | |
3451 | } | |
3452 | ||
3453 | n_subtract = 1; | |
3454 | ||
3455 | if (current->expect == EXPECT_TOPLEVEL) | |
3456 | current->expect = EXPECT_END; | |
3457 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3458 | current->expect = EXPECT_OBJECT_KEY; | |
3459 | else | |
3460 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3461 | ||
3462 | break; | |
3463 | } | |
3464 | ||
cd0b6c53 LP |
3465 | case _JSON_BUILD_LITERAL: { |
3466 | const char *l; | |
3467 | ||
3468 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3469 | r = -EINVAL; | |
3470 | goto finish; | |
3471 | } | |
3472 | ||
3473 | l = va_arg(ap, const char *); | |
3474 | ||
319a4f27 LP |
3475 | if (l) { |
3476 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
3477 | * errors even in suppressed object properties */ | |
3478 | ||
d642f640 | 3479 | r = json_parse(l, 0, &add, NULL, NULL); |
cd0b6c53 LP |
3480 | if (r < 0) |
3481 | goto finish; | |
319a4f27 LP |
3482 | } else |
3483 | add = JSON_VARIANT_MAGIC_NULL; | |
3484 | ||
3485 | n_subtract = 1; | |
cd0b6c53 LP |
3486 | |
3487 | if (current->expect == EXPECT_TOPLEVEL) | |
3488 | current->expect = EXPECT_END; | |
3489 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3490 | current->expect = EXPECT_OBJECT_KEY; | |
3491 | else | |
3492 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3493 | ||
3494 | break; | |
3495 | } | |
3496 | ||
3497 | case _JSON_BUILD_ARRAY_BEGIN: | |
3498 | ||
3499 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3500 | r = -EINVAL; | |
3501 | goto finish; | |
3502 | } | |
3503 | ||
3504 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
3505 | r = -ENOMEM; | |
3506 | goto finish; | |
3507 | } | |
3508 | current = stack + n_stack - 1; | |
3509 | ||
3510 | if (current->expect == EXPECT_TOPLEVEL) | |
3511 | current->expect = EXPECT_END; | |
3512 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3513 | current->expect = EXPECT_OBJECT_KEY; | |
3514 | else | |
3515 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3516 | ||
3517 | stack[n_stack++] = (JsonStack) { | |
3518 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
3519 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3520 | * new array, then we should | |
3521 | * also suppress all array | |
3522 | * members */ | |
cd0b6c53 LP |
3523 | }; |
3524 | ||
3525 | break; | |
3526 | ||
3527 | case _JSON_BUILD_ARRAY_END: | |
3528 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
3529 | r = -EINVAL; | |
3530 | goto finish; | |
3531 | } | |
3532 | ||
3533 | assert(n_stack > 1); | |
3534 | ||
319a4f27 LP |
3535 | if (current->n_suppress == 0) { |
3536 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
3537 | if (r < 0) | |
3538 | goto finish; | |
3539 | } | |
3540 | ||
3541 | n_subtract = 1; | |
cd0b6c53 LP |
3542 | |
3543 | json_stack_release(current); | |
3544 | n_stack--, current--; | |
3545 | ||
3546 | break; | |
3547 | ||
3548 | case _JSON_BUILD_STRV: { | |
3549 | char **l; | |
3550 | ||
3551 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3552 | r = -EINVAL; | |
3553 | goto finish; | |
3554 | } | |
3555 | ||
3556 | l = va_arg(ap, char **); | |
3557 | ||
319a4f27 LP |
3558 | if (current->n_suppress == 0) { |
3559 | r = json_variant_new_array_strv(&add, l); | |
3560 | if (r < 0) | |
3561 | goto finish; | |
3562 | } | |
3563 | ||
3564 | n_subtract = 1; | |
cd0b6c53 LP |
3565 | |
3566 | if (current->expect == EXPECT_TOPLEVEL) | |
3567 | current->expect = EXPECT_END; | |
3568 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3569 | current->expect = EXPECT_OBJECT_KEY; | |
3570 | else | |
3571 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3572 | ||
3573 | break; | |
3574 | } | |
886b0c93 LP |
3575 | |
3576 | case _JSON_BUILD_BASE64: { | |
3577 | const void *p; | |
3578 | size_t n; | |
3579 | ||
3580 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3581 | r = -EINVAL; | |
3582 | goto finish; | |
3583 | } | |
3584 | ||
3585 | p = va_arg(ap, const void *); | |
3586 | n = va_arg(ap, size_t); | |
3587 | ||
3588 | if (current->n_suppress == 0) { | |
3589 | r = json_variant_new_base64(&add, p, n); | |
3590 | if (r < 0) | |
3591 | goto finish; | |
3592 | } | |
3593 | ||
3594 | n_subtract = 1; | |
3595 | ||
3596 | if (current->expect == EXPECT_TOPLEVEL) | |
3597 | current->expect = EXPECT_END; | |
3598 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3599 | current->expect = EXPECT_OBJECT_KEY; | |
3600 | else | |
3601 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
0b9481cf LP |
3602 | |
3603 | break; | |
3604 | } | |
3605 | ||
3606 | case _JSON_BUILD_ID128: { | |
3607 | sd_id128_t id; | |
3608 | ||
3609 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3610 | r = -EINVAL; | |
3611 | goto finish; | |
3612 | } | |
3613 | ||
3614 | id = va_arg(ap, sd_id128_t); | |
3615 | ||
3616 | if (current->n_suppress == 0) { | |
3617 | r = json_variant_new_id128(&add, id); | |
3618 | if (r < 0) | |
3619 | goto finish; | |
3620 | } | |
3621 | ||
3622 | n_subtract = 1; | |
3623 | ||
3624 | if (current->expect == EXPECT_TOPLEVEL) | |
3625 | current->expect = EXPECT_END; | |
3626 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3627 | current->expect = EXPECT_OBJECT_KEY; | |
3628 | else | |
3629 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
0710343c LP |
3630 | |
3631 | break; | |
3632 | } | |
3633 | ||
3634 | case _JSON_BUILD_BYTE_ARRAY: { | |
3635 | const void *array; | |
3636 | size_t n; | |
3637 | ||
3638 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3639 | r = -EINVAL; | |
3640 | goto finish; | |
3641 | } | |
3642 | ||
3643 | array = va_arg(ap, const void*); | |
3644 | n = va_arg(ap, size_t); | |
3645 | ||
3646 | if (current->n_suppress == 0) { | |
3647 | r = json_variant_new_array_bytes(&add, array, n); | |
3648 | if (r < 0) | |
3649 | goto finish; | |
3650 | } | |
3651 | ||
3652 | n_subtract = 1; | |
3653 | ||
3654 | if (current->expect == EXPECT_TOPLEVEL) | |
3655 | current->expect = EXPECT_END; | |
3656 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3657 | current->expect = EXPECT_OBJECT_KEY; | |
3658 | else | |
3659 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
886b0c93 LP |
3660 | |
3661 | break; | |
3662 | } | |
cd0b6c53 LP |
3663 | |
3664 | case _JSON_BUILD_OBJECT_BEGIN: | |
3665 | ||
3666 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3667 | r = -EINVAL; | |
3668 | goto finish; | |
3669 | } | |
3670 | ||
3671 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
3672 | r = -ENOMEM; | |
3673 | goto finish; | |
3674 | } | |
3675 | current = stack + n_stack - 1; | |
3676 | ||
3677 | if (current->expect == EXPECT_TOPLEVEL) | |
3678 | current->expect = EXPECT_END; | |
3679 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3680 | current->expect = EXPECT_OBJECT_KEY; | |
3681 | else | |
3682 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3683 | ||
3684 | stack[n_stack++] = (JsonStack) { | |
3685 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
3686 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3687 | * new object, then we should | |
3688 | * also suppress all object | |
3689 | * members */ | |
cd0b6c53 LP |
3690 | }; |
3691 | ||
3692 | break; | |
3693 | ||
3694 | case _JSON_BUILD_OBJECT_END: | |
3695 | ||
3696 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3697 | r = -EINVAL; | |
3698 | goto finish; | |
3699 | } | |
3700 | ||
3701 | assert(n_stack > 1); | |
3702 | ||
319a4f27 LP |
3703 | if (current->n_suppress == 0) { |
3704 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3705 | if (r < 0) | |
3706 | goto finish; | |
3707 | } | |
3708 | ||
3709 | n_subtract = 1; | |
cd0b6c53 LP |
3710 | |
3711 | json_stack_release(current); | |
3712 | n_stack--, current--; | |
3713 | ||
3714 | break; | |
3715 | ||
3716 | case _JSON_BUILD_PAIR: { | |
3717 | const char *n; | |
3718 | ||
3719 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3720 | r = -EINVAL; | |
3721 | goto finish; | |
3722 | } | |
3723 | ||
3724 | n = va_arg(ap, const char *); | |
3725 | ||
319a4f27 LP |
3726 | if (current->n_suppress == 0) { |
3727 | r = json_variant_new_string(&add, n); | |
3728 | if (r < 0) | |
3729 | goto finish; | |
3730 | } | |
3731 | ||
3732 | n_subtract = 1; | |
3733 | ||
3734 | current->expect = EXPECT_OBJECT_VALUE; | |
3735 | break; | |
3736 | } | |
3737 | ||
3738 | case _JSON_BUILD_PAIR_CONDITION: { | |
3739 | const char *n; | |
3740 | bool b; | |
3741 | ||
3742 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3743 | r = -EINVAL; | |
cd0b6c53 | 3744 | goto finish; |
319a4f27 LP |
3745 | } |
3746 | ||
3747 | b = va_arg(ap, int); | |
3748 | n = va_arg(ap, const char *); | |
3749 | ||
3750 | if (b && current->n_suppress == 0) { | |
3751 | r = json_variant_new_string(&add, n); | |
3752 | if (r < 0) | |
3753 | goto finish; | |
3754 | } | |
3755 | ||
3756 | n_subtract = 1; /* we generated one item */ | |
3757 | ||
3758 | if (!b && current->n_suppress != (size_t) -1) | |
3759 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3760 | |
3761 | current->expect = EXPECT_OBJECT_VALUE; | |
3762 | break; | |
3763 | }} | |
3764 | ||
319a4f27 LP |
3765 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3766 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3767 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3768 | r = -ENOMEM; | |
3769 | goto finish; | |
3770 | } | |
3771 | ||
fcadf032 | 3772 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3773 | } |
319a4f27 LP |
3774 | |
3775 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3776 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3777 | * on this stack level */ | |
3778 | if (current->n_suppress != (size_t) -1) { | |
3779 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3780 | current->n_suppress = 0; | |
3781 | else | |
3782 | current->n_suppress -= n_subtract; | |
3783 | } | |
cd0b6c53 LP |
3784 | } |
3785 | ||
3786 | done: | |
3787 | assert(n_stack == 1); | |
3788 | assert(stack[0].n_elements == 1); | |
3789 | ||
3790 | *ret = json_variant_ref(stack[0].elements[0]); | |
3791 | r = 0; | |
3792 | ||
3793 | finish: | |
3794 | for (i = 0; i < n_stack; i++) | |
3795 | json_stack_release(stack + i); | |
3796 | ||
3797 | free(stack); | |
3798 | ||
cd0b6c53 LP |
3799 | return r; |
3800 | } | |
3801 | ||
3802 | int json_build(JsonVariant **ret, ...) { | |
3803 | va_list ap; | |
3804 | int r; | |
3805 | ||
3806 | va_start(ap, ret); | |
3807 | r = json_buildv(ret, ap); | |
3808 | va_end(ap); | |
3809 | ||
3810 | return r; | |
3811 | } | |
3812 | ||
3813 | int json_log_internal( | |
3814 | JsonVariant *variant, | |
3815 | int level, | |
3816 | int error, | |
3817 | const char *file, | |
3818 | int line, | |
3819 | const char *func, | |
3820 | const char *format, ...) { | |
3821 | ||
3822 | PROTECT_ERRNO; | |
3823 | ||
3824 | unsigned source_line, source_column; | |
3825 | char buffer[LINE_MAX]; | |
3826 | const char *source; | |
3827 | va_list ap; | |
3828 | int r; | |
3829 | ||
fc0f6fbf | 3830 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3831 | |
3832 | va_start(ap, format); | |
3833 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3834 | va_end(ap); | |
3835 | ||
3836 | if (variant) { | |
3837 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3838 | if (r < 0) | |
3839 | return r; | |
3840 | } else { | |
3841 | source = NULL; | |
3842 | source_line = 0; | |
3843 | source_column = 0; | |
3844 | } | |
3845 | ||
3846 | if (source && source_line > 0 && source_column > 0) | |
3847 | return log_struct_internal( | |
3848 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3849 | error, | |
3850 | file, line, func, | |
3851 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3852 | "CONFIG_FILE=%s", source, | |
3853 | "CONFIG_LINE=%u", source_line, | |
3854 | "CONFIG_COLUMN=%u", source_column, | |
13a16a2b | 3855 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
cd0b6c53 LP |
3856 | NULL); |
3857 | else | |
3858 | return log_struct_internal( | |
3859 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3860 | error, | |
3861 | file, line, func, | |
3862 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3863 | LOG_MESSAGE("%s", buffer), | |
3864 | NULL); | |
3865 | } | |
3866 | ||
3867 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3868 | const JsonDispatch *p; | |
3869 | size_t i, n, m; | |
3870 | int r, done = 0; | |
3871 | bool *found; | |
3872 | ||
3873 | if (!json_variant_is_object(v)) { | |
3874 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3875 | ||
3876 | if (flags & JSON_PERMISSIVE) | |
3877 | return 0; | |
3878 | ||
3879 | return -EINVAL; | |
3880 | } | |
3881 | ||
3882 | for (p = table, m = 0; p->name; p++) | |
3883 | m++; | |
3884 | ||
3885 | found = newa0(bool, m); | |
3886 | ||
3887 | n = json_variant_elements(v); | |
3888 | for (i = 0; i < n; i += 2) { | |
3889 | JsonVariant *key, *value; | |
3890 | ||
3891 | assert_se(key = json_variant_by_index(v, i)); | |
3892 | assert_se(value = json_variant_by_index(v, i+1)); | |
3893 | ||
3894 | for (p = table; p->name; p++) | |
66032ef4 | 3895 | if (p->name == POINTER_MAX || |
cd0b6c53 LP |
3896 | streq_ptr(json_variant_string(key), p->name)) |
3897 | break; | |
3898 | ||
3899 | if (p->name) { /* Found a matching entry! :-) */ | |
3900 | JsonDispatchFlags merged_flags; | |
3901 | ||
3902 | merged_flags = flags | p->flags; | |
3903 | ||
3904 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3905 | !json_variant_has_type(value, p->type)) { | |
3906 | ||
3907 | json_log(value, merged_flags, 0, | |
3908 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3909 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3910 | ||
3911 | if (merged_flags & JSON_PERMISSIVE) | |
3912 | continue; | |
3913 | ||
3914 | return -EINVAL; | |
3915 | } | |
3916 | ||
3917 | if (found[p-table]) { | |
3918 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3919 | ||
3920 | if (merged_flags & JSON_PERMISSIVE) | |
3921 | continue; | |
3922 | ||
3923 | return -ENOTUNIQ; | |
3924 | } | |
3925 | ||
3926 | found[p-table] = true; | |
3927 | ||
3928 | if (p->callback) { | |
3929 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3930 | if (r < 0) { | |
3931 | if (merged_flags & JSON_PERMISSIVE) | |
3932 | continue; | |
3933 | ||
3934 | return r; | |
3935 | } | |
3936 | } | |
3937 | ||
3938 | done ++; | |
3939 | ||
3940 | } else { /* Didn't find a matching entry! :-( */ | |
3941 | ||
3942 | if (bad) { | |
3943 | r = bad(json_variant_string(key), value, flags, userdata); | |
3944 | if (r < 0) { | |
3945 | if (flags & JSON_PERMISSIVE) | |
3946 | continue; | |
3947 | ||
3948 | return r; | |
3949 | } else | |
3950 | done ++; | |
3951 | ||
3952 | } else { | |
3953 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3954 | ||
3955 | if (flags & JSON_PERMISSIVE) | |
3956 | continue; | |
3957 | ||
3958 | return -EADDRNOTAVAIL; | |
3959 | } | |
3960 | } | |
3961 | } | |
3962 | ||
3963 | for (p = table; p->name; p++) { | |
3964 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3965 | ||
3966 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3967 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3968 | ||
3969 | if ((merged_flags & JSON_PERMISSIVE)) | |
3970 | continue; | |
3971 | ||
3972 | return -ENXIO; | |
3973 | } | |
3974 | } | |
3975 | ||
3976 | return done; | |
3977 | } | |
3978 | ||
3979 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3980 | bool *b = userdata; | |
3981 | ||
3982 | assert(variant); | |
3983 | assert(b); | |
3984 | ||
02dab76e LP |
3985 | if (!json_variant_is_boolean(variant)) |
3986 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
3987 | |
3988 | *b = json_variant_boolean(variant); | |
3989 | return 0; | |
3990 | } | |
3991 | ||
3992 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3993 | int *b = userdata; | |
3994 | ||
3995 | assert(variant); | |
3996 | assert(b); | |
3997 | ||
3dd1b600 LP |
3998 | if (json_variant_is_null(variant)) { |
3999 | *b = -1; | |
4000 | return 0; | |
4001 | } | |
4002 | ||
02dab76e LP |
4003 | if (!json_variant_is_boolean(variant)) |
4004 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
4005 | |
4006 | *b = json_variant_boolean(variant); | |
4007 | return 0; | |
4008 | } | |
4009 | ||
4010 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4011 | intmax_t *i = userdata; | |
4012 | ||
4013 | assert(variant); | |
4014 | assert(i); | |
4015 | ||
02dab76e LP |
4016 | if (!json_variant_is_integer(variant)) |
4017 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 LP |
4018 | |
4019 | *i = json_variant_integer(variant); | |
4020 | return 0; | |
4021 | } | |
4022 | ||
4023 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4024 | uintmax_t *u = userdata; | |
4025 | ||
4026 | assert(variant); | |
4027 | assert(u); | |
4028 | ||
02dab76e LP |
4029 | if (!json_variant_is_unsigned(variant)) |
4030 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 LP |
4031 | |
4032 | *u = json_variant_unsigned(variant); | |
4033 | return 0; | |
4034 | } | |
4035 | ||
4036 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4037 | uint32_t *u = userdata; | |
4038 | ||
4039 | assert(variant); | |
4040 | assert(u); | |
4041 | ||
02dab76e LP |
4042 | if (!json_variant_is_unsigned(variant)) |
4043 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 | 4044 | |
02dab76e LP |
4045 | if (json_variant_unsigned(variant) > UINT32_MAX) |
4046 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
4047 | |
4048 | *u = (uint32_t) json_variant_unsigned(variant); | |
4049 | return 0; | |
4050 | } | |
4051 | ||
4052 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4053 | int32_t *i = userdata; | |
4054 | ||
4055 | assert(variant); | |
4056 | assert(i); | |
4057 | ||
02dab76e LP |
4058 | if (!json_variant_is_integer(variant)) |
4059 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 | 4060 | |
02dab76e LP |
4061 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) |
4062 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
4063 | |
4064 | *i = (int32_t) json_variant_integer(variant); | |
4065 | return 0; | |
4066 | } | |
4067 | ||
4068 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4069 | char **s = userdata; | |
4070 | int r; | |
4071 | ||
4072 | assert(variant); | |
4073 | assert(s); | |
4074 | ||
4075 | if (json_variant_is_null(variant)) { | |
4076 | *s = mfree(*s); | |
4077 | return 0; | |
4078 | } | |
4079 | ||
02dab76e LP |
4080 | if (!json_variant_is_string(variant)) |
4081 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
cd0b6c53 | 4082 | |
ba23dbf1 LP |
4083 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) |
4084 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4085 | ||
cd0b6c53 LP |
4086 | r = free_and_strdup(s, json_variant_string(variant)); |
4087 | if (r < 0) | |
4088 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4089 | ||
4090 | return 0; | |
4091 | } | |
4092 | ||
19a209cc LP |
4093 | int json_dispatch_const_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4094 | const char **s = userdata; | |
4095 | ||
4096 | assert(variant); | |
4097 | assert(s); | |
4098 | ||
4099 | if (json_variant_is_null(variant)) { | |
4100 | *s = NULL; | |
4101 | return 0; | |
4102 | } | |
4103 | ||
4104 | if (!json_variant_is_string(variant)) | |
4105 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4106 | ||
4107 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) | |
4108 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4109 | ||
4110 | *s = json_variant_string(variant); | |
4111 | return 0; | |
4112 | } | |
4113 | ||
cd0b6c53 LP |
4114 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4115 | _cleanup_strv_free_ char **l = NULL; | |
4116 | char ***s = userdata; | |
ca5e7694 | 4117 | JsonVariant *e; |
cd0b6c53 LP |
4118 | int r; |
4119 | ||
4120 | assert(variant); | |
4121 | assert(s); | |
4122 | ||
4123 | if (json_variant_is_null(variant)) { | |
4124 | *s = strv_free(*s); | |
4125 | return 0; | |
4126 | } | |
4127 | ||
07737617 LP |
4128 | /* Let's be flexible here: accept a single string in place of a single-item array */ |
4129 | if (json_variant_is_string(variant)) { | |
ba23dbf1 LP |
4130 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) |
4131 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4132 | ||
07737617 LP |
4133 | l = strv_new(json_variant_string(variant)); |
4134 | if (!l) | |
4135 | return log_oom(); | |
4136 | ||
4137 | strv_free_and_replace(*s, l); | |
4138 | return 0; | |
4139 | } | |
4140 | ||
02dab76e LP |
4141 | if (!json_variant_is_array(variant)) |
4142 | return json_log(variant, SYNTHETIC_ERRNO(EINVAL), flags, "JSON field '%s' is not an array.", strna(name)); | |
cd0b6c53 | 4143 | |
ca5e7694 | 4144 | JSON_VARIANT_ARRAY_FOREACH(e, variant) { |
02dab76e LP |
4145 | if (!json_variant_is_string(e)) |
4146 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); | |
cd0b6c53 | 4147 | |
ba23dbf1 LP |
4148 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(e))) |
4149 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4150 | ||
cd0b6c53 LP |
4151 | r = strv_extend(&l, json_variant_string(e)); |
4152 | if (r < 0) | |
b2bdf6e4 | 4153 | return json_log(e, flags, r, "Failed to append array element: %m"); |
cd0b6c53 LP |
4154 | } |
4155 | ||
4156 | strv_free_and_replace(*s, l); | |
4157 | return 0; | |
4158 | } | |
4159 | ||
4160 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4161 | JsonVariant **p = userdata; | |
4162 | ||
4163 | assert(variant); | |
4164 | assert(p); | |
4165 | ||
4166 | json_variant_unref(*p); | |
4167 | *p = json_variant_ref(variant); | |
4168 | ||
4169 | return 0; | |
4170 | } | |
4171 | ||
a42ef715 LP |
4172 | int json_dispatch_uid_gid(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4173 | uid_t *uid = userdata; | |
4174 | uintmax_t k; | |
4175 | ||
4176 | assert_cc(sizeof(uid_t) == sizeof(uint32_t)); | |
4177 | assert_cc(sizeof(gid_t) == sizeof(uint32_t)); | |
4178 | ||
6028d766 | 4179 | DISABLE_WARNING_TYPE_LIMITS; |
a42ef715 | 4180 | assert_cc(((uid_t) -1 < (uid_t) 0) == ((gid_t) -1 < (gid_t) 0)); |
6028d766 | 4181 | REENABLE_WARNING; |
a42ef715 LP |
4182 | |
4183 | if (json_variant_is_null(variant)) { | |
4184 | *uid = UID_INVALID; | |
4185 | return 0; | |
4186 | } | |
4187 | ||
4188 | if (!json_variant_is_unsigned(variant)) | |
4189 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a integer.", strna(name)); | |
4190 | ||
4191 | k = json_variant_unsigned(variant); | |
4192 | if (k > UINT32_MAX || !uid_is_valid(k)) | |
4193 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid UID/GID.", strna(name)); | |
4194 | ||
4195 | *uid = k; | |
4196 | return 0; | |
4197 | } | |
4198 | ||
4199 | int json_dispatch_user_group_name(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4200 | char **s = userdata; | |
4201 | const char *n; | |
4202 | int r; | |
4203 | ||
4204 | if (json_variant_is_null(variant)) { | |
4205 | *s = mfree(*s); | |
4206 | return 0; | |
4207 | } | |
4208 | ||
4209 | if (!json_variant_is_string(variant)) | |
4210 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4211 | ||
4212 | n = json_variant_string(variant); | |
7a8867ab | 4213 | if (!valid_user_group_name(n, FLAGS_SET(flags, JSON_RELAX) ? VALID_USER_RELAX : 0)) |
a42ef715 LP |
4214 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid user/group name.", strna(name)); |
4215 | ||
4216 | r = free_and_strdup(s, n); | |
4217 | if (r < 0) | |
4218 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4219 | ||
4220 | return 0; | |
4221 | } | |
4222 | ||
4223 | int json_dispatch_id128(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4224 | sd_id128_t *uuid = userdata; | |
4225 | int r; | |
4226 | ||
4227 | if (json_variant_is_null(variant)) { | |
4228 | *uuid = SD_ID128_NULL; | |
4229 | return 0; | |
4230 | } | |
4231 | ||
4232 | if (!json_variant_is_string(variant)) | |
4233 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4234 | ||
4235 | r = sd_id128_from_string(json_variant_string(variant), uuid); | |
4236 | if (r < 0) | |
4237 | return json_log(variant, flags, r, "JSON field '%s' is not a valid UID.", strna(name)); | |
4238 | ||
4239 | return 0; | |
4240 | } | |
4241 | ||
4242 | int json_dispatch_unsupported(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4243 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not allowed in this object.", strna(name)); | |
4244 | } | |
4245 | ||
b7fc90a2 LP |
4246 | static int json_cmp_strings(const void *x, const void *y) { |
4247 | JsonVariant *const *a = x, *const *b = y; | |
4248 | ||
4249 | if (!json_variant_is_string(*a) || !json_variant_is_string(*b)) | |
4250 | return CMP(*a, *b); | |
4251 | ||
4252 | return strcmp(json_variant_string(*a), json_variant_string(*b)); | |
4253 | } | |
4254 | ||
4255 | int json_variant_sort(JsonVariant **v) { | |
4256 | _cleanup_free_ JsonVariant **a = NULL; | |
4257 | JsonVariant *n = NULL; | |
4258 | size_t i, m; | |
4259 | int r; | |
4260 | ||
4261 | assert(v); | |
4262 | ||
4263 | if (json_variant_is_sorted(*v)) | |
4264 | return 0; | |
4265 | ||
4266 | if (!json_variant_is_object(*v)) | |
4267 | return -EMEDIUMTYPE; | |
4268 | ||
4269 | /* Sorts they key/value pairs in an object variant */ | |
4270 | ||
4271 | m = json_variant_elements(*v); | |
4272 | a = new(JsonVariant*, m); | |
4273 | if (!a) | |
4274 | return -ENOMEM; | |
4275 | ||
4276 | for (i = 0; i < m; i++) | |
4277 | a[i] = json_variant_by_index(*v, i); | |
4278 | ||
4279 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4280 | ||
4281 | r = json_variant_new_object(&n, a, m); | |
4282 | if (r < 0) | |
4283 | return r; | |
94600eeb LP |
4284 | |
4285 | json_variant_propagate_sensitive(*v, n); | |
4286 | ||
b7fc90a2 LP |
4287 | if (!n->sorted) /* Check if this worked. This will fail if there are multiple identical keys used. */ |
4288 | return -ENOTUNIQ; | |
4289 | ||
4290 | json_variant_unref(*v); | |
4291 | *v = n; | |
4292 | ||
4293 | return 1; | |
4294 | } | |
4295 | ||
4296 | int json_variant_normalize(JsonVariant **v) { | |
4297 | _cleanup_free_ JsonVariant **a = NULL; | |
4298 | JsonVariant *n = NULL; | |
4299 | size_t i, j, m; | |
4300 | int r; | |
4301 | ||
4302 | assert(v); | |
4303 | ||
4304 | if (json_variant_is_normalized(*v)) | |
4305 | return 0; | |
4306 | ||
4307 | if (!json_variant_is_object(*v) && !json_variant_is_array(*v)) | |
4308 | return -EMEDIUMTYPE; | |
4309 | ||
4310 | /* Sorts the key/value pairs in an object variant anywhere down the tree in the specified variant */ | |
4311 | ||
4312 | m = json_variant_elements(*v); | |
4313 | a = new(JsonVariant*, m); | |
4314 | if (!a) | |
4315 | return -ENOMEM; | |
4316 | ||
4317 | for (i = 0; i < m; i++) { | |
4318 | a[i] = json_variant_ref(json_variant_by_index(*v, i)); | |
4319 | ||
4320 | r = json_variant_normalize(a + i); | |
4321 | if (r < 0) | |
4322 | goto finish; | |
4323 | } | |
4324 | ||
4325 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4326 | ||
4327 | if (json_variant_is_object(*v)) | |
4328 | r = json_variant_new_object(&n, a, m); | |
4329 | else { | |
4330 | assert(json_variant_is_array(*v)); | |
4331 | r = json_variant_new_array(&n, a, m); | |
4332 | } | |
4333 | if (r < 0) | |
4334 | goto finish; | |
94600eeb LP |
4335 | |
4336 | json_variant_propagate_sensitive(*v, n); | |
4337 | ||
b7fc90a2 LP |
4338 | if (!n->normalized) { /* Let's see if normalization worked. It will fail if there are multiple |
4339 | * identical keys used in the same object anywhere, or if there are floating | |
4340 | * point numbers used (see below) */ | |
4341 | r = -ENOTUNIQ; | |
4342 | goto finish; | |
4343 | } | |
4344 | ||
4345 | json_variant_unref(*v); | |
4346 | *v = n; | |
4347 | ||
4348 | r = 1; | |
4349 | ||
4350 | finish: | |
4351 | for (j = 0; j < i; j++) | |
4352 | json_variant_unref(a[j]); | |
4353 | ||
4354 | return r; | |
4355 | } | |
4356 | ||
4357 | bool json_variant_is_normalized(JsonVariant *v) { | |
4358 | ||
4359 | /* For now, let's consider anything containing numbers not expressible as integers as | |
4360 | * non-normalized. That's because we cannot sensibly compare them due to accuracy issues, nor even | |
4361 | * store them if they are too large. */ | |
4362 | if (json_variant_is_real(v) && !json_variant_is_integer(v) && !json_variant_is_unsigned(v)) | |
4363 | return false; | |
4364 | ||
4365 | /* The concept only applies to variants that include other variants, i.e. objects and arrays. All | |
4366 | * others are normalized anyway. */ | |
4367 | if (!json_variant_is_object(v) && !json_variant_is_array(v)) | |
4368 | return true; | |
4369 | ||
4370 | /* Empty objects/arrays don't include any other variant, hence are always normalized too */ | |
4371 | if (json_variant_elements(v) == 0) | |
4372 | return true; | |
4373 | ||
4374 | return v->normalized; /* For everything else there's an explicit boolean we maintain */ | |
4375 | } | |
4376 | ||
4377 | bool json_variant_is_sorted(JsonVariant *v) { | |
4378 | ||
4379 | /* Returns true if all key/value pairs of an object are properly sorted. Note that this only applies | |
4380 | * to objects, not arrays. */ | |
4381 | ||
4382 | if (!json_variant_is_object(v)) | |
4383 | return true; | |
4384 | if (json_variant_elements(v) <= 1) | |
4385 | return true; | |
4386 | ||
4387 | return v->sorted; | |
4388 | } | |
4389 | ||
faca141c LP |
4390 | int json_variant_unbase64(JsonVariant *v, void **ret, size_t *ret_size) { |
4391 | ||
4392 | if (!json_variant_is_string(v)) | |
4393 | return -EINVAL; | |
4394 | ||
4395 | return unbase64mem(json_variant_string(v), (size_t) -1, ret, ret_size); | |
4396 | } | |
4397 | ||
cd0b6c53 LP |
4398 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { |
4399 | [JSON_VARIANT_STRING] = "string", | |
4400 | [JSON_VARIANT_INTEGER] = "integer", | |
4401 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
4402 | [JSON_VARIANT_REAL] = "real", | |
4403 | [JSON_VARIANT_NUMBER] = "number", | |
4404 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
4405 | [JSON_VARIANT_ARRAY] = "array", | |
4406 | [JSON_VARIANT_OBJECT] = "object", | |
4407 | [JSON_VARIANT_NULL] = "null", | |
4408 | }; | |
4409 | ||
4410 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |