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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 | ||
408 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); | |
409 | if (r < 0) | |
410 | return r; | |
411 | ||
412 | memcpy(v->string, s, n); | |
413 | v->string[n] = 0; | |
414 | ||
415 | *ret = v; | |
416 | return 0; | |
417 | } | |
418 | ||
cc164891 LP |
419 | int json_variant_new_base64(JsonVariant **ret, const void *p, size_t n) { |
420 | _cleanup_free_ char *s = NULL; | |
421 | ssize_t k; | |
422 | ||
423 | assert_return(ret, -EINVAL); | |
424 | assert_return(n == 0 || p, -EINVAL); | |
425 | ||
426 | k = base64mem(p, n, &s); | |
427 | if (k < 0) | |
428 | return k; | |
429 | ||
430 | return json_variant_new_stringn(ret, s, k); | |
431 | } | |
432 | ||
cd0b6c53 LP |
433 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { |
434 | assert(a); | |
435 | ||
436 | b = json_variant_dereference(b); | |
437 | if (!b) { | |
438 | a->type = JSON_VARIANT_NULL; | |
439 | return; | |
440 | } | |
441 | ||
442 | a->type = json_variant_type(b); | |
443 | switch (a->type) { | |
444 | ||
445 | case JSON_VARIANT_INTEGER: | |
446 | a->value.integer = json_variant_integer(b); | |
447 | break; | |
448 | ||
449 | case JSON_VARIANT_UNSIGNED: | |
450 | a->value.unsig = json_variant_unsigned(b); | |
451 | break; | |
452 | ||
453 | case JSON_VARIANT_REAL: | |
454 | a->value.real = json_variant_real(b); | |
455 | break; | |
456 | ||
457 | case JSON_VARIANT_BOOLEAN: | |
458 | a->value.boolean = json_variant_boolean(b); | |
459 | break; | |
460 | ||
461 | case JSON_VARIANT_STRING: { | |
462 | const char *s; | |
463 | ||
464 | assert_se(s = json_variant_string(b)); | |
465 | ||
466 | /* Short strings we can store inline */ | |
467 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
468 | strcpy(a->string, s); | |
469 | break; | |
470 | } | |
471 | ||
472 | /* For longer strings, use a reference… */ | |
473 | _fallthrough_; | |
474 | } | |
475 | ||
476 | case JSON_VARIANT_ARRAY: | |
477 | case JSON_VARIANT_OBJECT: | |
478 | a->is_reference = true; | |
b7fc90a2 | 479 | a->reference = json_variant_ref(json_variant_conservative_formalize(b)); |
cd0b6c53 LP |
480 | break; |
481 | ||
482 | case JSON_VARIANT_NULL: | |
483 | break; | |
484 | ||
485 | default: | |
486 | assert_not_reached("Unexpected variant type"); | |
487 | } | |
488 | } | |
489 | ||
490 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
491 | assert(v); | |
492 | assert(from); | |
493 | ||
d520d519 | 494 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
495 | return; |
496 | ||
497 | v->line = from->line; | |
498 | v->column = from->column; | |
499 | v->source = json_source_ref(from->source); | |
500 | } | |
501 | ||
502 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 503 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
b7fc90a2 | 504 | bool normalized = true; |
cd0b6c53 LP |
505 | |
506 | assert_return(ret, -EINVAL); | |
507 | if (n == 0) { | |
508 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
509 | return 0; | |
510 | } | |
511 | assert_return(array, -EINVAL); | |
512 | ||
513 | v = new(JsonVariant, n + 1); | |
514 | if (!v) | |
515 | return -ENOMEM; | |
516 | ||
517 | *v = (JsonVariant) { | |
518 | .n_ref = 1, | |
519 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
520 | }; |
521 | ||
b2fa0d4f LP |
522 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
523 | JsonVariant *w = v + 1 + v->n_elements, | |
524 | *c = array[v->n_elements]; | |
525 | uint16_t d; | |
526 | ||
527 | d = json_variant_depth(c); | |
528 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
529 | return -ELNRNG; | |
530 | if (d >= v->depth) | |
531 | v->depth = d + 1; | |
cd0b6c53 LP |
532 | |
533 | *w = (JsonVariant) { | |
534 | .is_embedded = true, | |
535 | .parent = v, | |
536 | }; | |
537 | ||
b2fa0d4f LP |
538 | json_variant_set(w, c); |
539 | json_variant_copy_source(w, c); | |
b7fc90a2 LP |
540 | |
541 | if (!json_variant_is_normalized(c)) | |
542 | normalized = false; | |
cd0b6c53 LP |
543 | } |
544 | ||
b7fc90a2 LP |
545 | v->normalized = normalized; |
546 | ||
b2fa0d4f | 547 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
548 | return 0; |
549 | } | |
550 | ||
551 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
552 | JsonVariant *v; | |
553 | size_t i; | |
554 | ||
555 | assert_return(ret, -EINVAL); | |
556 | if (n == 0) { | |
557 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
558 | return 0; | |
559 | } | |
560 | assert_return(p, -EINVAL); | |
561 | ||
562 | v = new(JsonVariant, n + 1); | |
563 | if (!v) | |
564 | return -ENOMEM; | |
565 | ||
566 | *v = (JsonVariant) { | |
567 | .n_ref = 1, | |
568 | .type = JSON_VARIANT_ARRAY, | |
569 | .n_elements = n, | |
b2fa0d4f | 570 | .depth = 1, |
cd0b6c53 LP |
571 | }; |
572 | ||
573 | for (i = 0; i < n; i++) { | |
574 | JsonVariant *w = v + 1 + i; | |
575 | ||
576 | *w = (JsonVariant) { | |
577 | .is_embedded = true, | |
578 | .parent = v, | |
a1559e3f LP |
579 | .type = JSON_VARIANT_UNSIGNED, |
580 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 581 | }; |
cd0b6c53 LP |
582 | } |
583 | ||
b7fc90a2 LP |
584 | v->normalized = true; |
585 | ||
cd0b6c53 LP |
586 | *ret = v; |
587 | return 0; | |
588 | } | |
589 | ||
590 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
591 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
592 | size_t n; | |
593 | int r; | |
594 | ||
595 | assert(ret); | |
596 | ||
597 | n = strv_length(l); | |
598 | if (n == 0) { | |
599 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
600 | return 0; | |
601 | } | |
602 | ||
a1559e3f | 603 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
604 | if (!v) |
605 | return -ENOMEM; | |
606 | ||
607 | *v = (JsonVariant) { | |
608 | .n_ref = 1, | |
609 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 610 | .depth = 1, |
cd0b6c53 LP |
611 | }; |
612 | ||
613 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
614 | JsonVariant *w = v + 1 + v->n_elements; | |
615 | size_t k; | |
616 | ||
a1559e3f LP |
617 | *w = (JsonVariant) { |
618 | .is_embedded = true, | |
619 | .parent = v, | |
620 | .type = JSON_VARIANT_STRING, | |
621 | }; | |
cd0b6c53 LP |
622 | |
623 | k = strlen(l[v->n_elements]); | |
624 | ||
625 | if (k > INLINE_STRING_MAX) { | |
626 | /* If string is too long, store it as reference. */ | |
627 | ||
cbb3092c | 628 | r = json_variant_new_string(&w->reference, l[v->n_elements]); |
cd0b6c53 LP |
629 | if (r < 0) |
630 | return r; | |
631 | ||
632 | w->is_reference = true; | |
633 | } else | |
634 | memcpy(w->string, l[v->n_elements], k+1); | |
635 | } | |
636 | ||
b7fc90a2 LP |
637 | v->normalized = true; |
638 | ||
cd0b6c53 LP |
639 | *ret = TAKE_PTR(v); |
640 | return 0; | |
641 | } | |
642 | ||
643 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 644 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
b7fc90a2 LP |
645 | const char *prev = NULL; |
646 | bool sorted = true, normalized = true; | |
cd0b6c53 LP |
647 | |
648 | assert_return(ret, -EINVAL); | |
649 | if (n == 0) { | |
650 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
651 | return 0; | |
652 | } | |
653 | assert_return(array, -EINVAL); | |
654 | assert_return(n % 2 == 0, -EINVAL); | |
655 | ||
656 | v = new(JsonVariant, n + 1); | |
657 | if (!v) | |
658 | return -ENOMEM; | |
659 | ||
660 | *v = (JsonVariant) { | |
661 | .n_ref = 1, | |
662 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
663 | }; |
664 | ||
b2fa0d4f LP |
665 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
666 | JsonVariant *w = v + 1 + v->n_elements, | |
667 | *c = array[v->n_elements]; | |
668 | uint16_t d; | |
669 | ||
b7fc90a2 LP |
670 | if ((v->n_elements & 1) == 0) { |
671 | const char *k; | |
672 | ||
673 | if (!json_variant_is_string(c)) | |
674 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
675 | ||
676 | assert_se(k = json_variant_string(c)); | |
677 | ||
678 | if (prev && strcmp(k, prev) <= 0) | |
679 | sorted = normalized = false; | |
680 | ||
681 | prev = k; | |
682 | } else if (!json_variant_is_normalized(c)) | |
683 | normalized = false; | |
d77e781f | 684 | |
b2fa0d4f LP |
685 | d = json_variant_depth(c); |
686 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
687 | return -ELNRNG; | |
688 | if (d >= v->depth) | |
689 | v->depth = d + 1; | |
cd0b6c53 LP |
690 | |
691 | *w = (JsonVariant) { | |
692 | .is_embedded = true, | |
693 | .parent = v, | |
694 | }; | |
695 | ||
b2fa0d4f LP |
696 | json_variant_set(w, c); |
697 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
698 | } |
699 | ||
b7fc90a2 LP |
700 | v->normalized = normalized; |
701 | v->sorted = sorted; | |
702 | ||
b2fa0d4f | 703 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
704 | return 0; |
705 | } | |
706 | ||
83bc6cb7 LP |
707 | static size_t json_variant_size(JsonVariant* v) { |
708 | ||
709 | if (!json_variant_is_regular(v)) | |
710 | return 0; | |
711 | ||
712 | if (v->is_reference) | |
713 | return offsetof(JsonVariant, reference) + sizeof(JsonVariant*); | |
714 | ||
715 | switch (v->type) { | |
716 | ||
717 | case JSON_VARIANT_STRING: | |
718 | return offsetof(JsonVariant, string) + strlen(v->string) + 1; | |
719 | ||
720 | case JSON_VARIANT_REAL: | |
721 | return offsetof(JsonVariant, value) + sizeof(long double); | |
722 | ||
723 | case JSON_VARIANT_UNSIGNED: | |
724 | return offsetof(JsonVariant, value) + sizeof(uintmax_t); | |
725 | ||
726 | case JSON_VARIANT_INTEGER: | |
727 | return offsetof(JsonVariant, value) + sizeof(intmax_t); | |
728 | ||
729 | case JSON_VARIANT_BOOLEAN: | |
730 | return offsetof(JsonVariant, value) + sizeof(bool); | |
731 | ||
732 | case JSON_VARIANT_ARRAY: | |
733 | case JSON_VARIANT_OBJECT: | |
734 | return offsetof(JsonVariant, n_elements) + sizeof(size_t); | |
735 | ||
736 | case JSON_VARIANT_NULL: | |
737 | return offsetof(JsonVariant, value); | |
738 | ||
739 | default: | |
740 | assert_not_reached("unexpected type"); | |
741 | } | |
742 | } | |
743 | ||
744 | static void json_variant_free_inner(JsonVariant *v, bool force_sensitive) { | |
745 | bool sensitive; | |
746 | ||
cd0b6c53 LP |
747 | assert(v); |
748 | ||
d520d519 | 749 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
750 | return; |
751 | ||
752 | json_source_unref(v->source); | |
753 | ||
83bc6cb7 LP |
754 | sensitive = v->sensitive || force_sensitive; |
755 | ||
cd0b6c53 | 756 | if (v->is_reference) { |
83bc6cb7 LP |
757 | if (sensitive) |
758 | json_variant_sensitive(v->reference); | |
759 | ||
cd0b6c53 LP |
760 | json_variant_unref(v->reference); |
761 | return; | |
762 | } | |
763 | ||
764 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
765 | size_t i; | |
766 | ||
767 | for (i = 0; i < v->n_elements; i++) | |
83bc6cb7 | 768 | json_variant_free_inner(v + 1 + i, sensitive); |
cd0b6c53 | 769 | } |
83bc6cb7 LP |
770 | |
771 | if (sensitive) | |
772 | explicit_bzero_safe(v, json_variant_size(v)); | |
cd0b6c53 LP |
773 | } |
774 | ||
775 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
776 | if (!v) | |
777 | return NULL; | |
d520d519 | 778 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
779 | return v; |
780 | ||
781 | if (v->is_embedded) | |
782 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
783 | else { | |
784 | assert(v->n_ref > 0); | |
785 | v->n_ref++; | |
786 | } | |
787 | ||
788 | return v; | |
789 | } | |
790 | ||
791 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
792 | if (!v) | |
793 | return NULL; | |
d520d519 | 794 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
795 | return NULL; |
796 | ||
797 | if (v->is_embedded) | |
798 | json_variant_unref(v->parent); | |
799 | else { | |
800 | assert(v->n_ref > 0); | |
801 | v->n_ref--; | |
802 | ||
803 | if (v->n_ref == 0) { | |
83bc6cb7 | 804 | json_variant_free_inner(v, false); |
cd0b6c53 LP |
805 | free(v); |
806 | } | |
807 | } | |
808 | ||
809 | return NULL; | |
810 | } | |
811 | ||
812 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
813 | size_t i; | |
814 | ||
815 | assert(array || n == 0); | |
816 | ||
817 | for (i = 0; i < n; i++) | |
818 | json_variant_unref(array[i]); | |
819 | } | |
820 | ||
821 | const char *json_variant_string(JsonVariant *v) { | |
822 | if (!v) | |
823 | return NULL; | |
824 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
825 | return ""; | |
826 | if (json_variant_is_magic(v)) | |
827 | goto mismatch; | |
d520d519 LP |
828 | if (json_variant_is_const_string(v)) { |
829 | uintptr_t p = (uintptr_t) v; | |
830 | ||
831 | assert((p & 1) != 0); | |
832 | return (const char*) (p ^ 1U); | |
833 | } | |
834 | ||
cd0b6c53 LP |
835 | if (v->is_reference) |
836 | return json_variant_string(v->reference); | |
837 | if (v->type != JSON_VARIANT_STRING) | |
838 | goto mismatch; | |
839 | ||
840 | return v->string; | |
841 | ||
842 | mismatch: | |
843 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
844 | return NULL; | |
845 | } | |
846 | ||
847 | bool json_variant_boolean(JsonVariant *v) { | |
848 | if (!v) | |
849 | goto mismatch; | |
850 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
851 | return true; | |
852 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
853 | return false; | |
d520d519 | 854 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
855 | goto mismatch; |
856 | if (v->type != JSON_VARIANT_BOOLEAN) | |
857 | goto mismatch; | |
858 | if (v->is_reference) | |
859 | return json_variant_boolean(v->reference); | |
860 | ||
861 | return v->value.boolean; | |
862 | ||
863 | mismatch: | |
864 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
865 | return false; | |
866 | } | |
867 | ||
868 | intmax_t json_variant_integer(JsonVariant *v) { | |
869 | if (!v) | |
870 | goto mismatch; | |
871 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
872 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
873 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
874 | return 0; | |
d520d519 | 875 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
876 | goto mismatch; |
877 | if (v->is_reference) | |
878 | return json_variant_integer(v->reference); | |
879 | ||
880 | switch (v->type) { | |
881 | ||
882 | case JSON_VARIANT_INTEGER: | |
883 | return v->value.integer; | |
884 | ||
885 | case JSON_VARIANT_UNSIGNED: | |
886 | if (v->value.unsig <= INTMAX_MAX) | |
887 | return (intmax_t) v->value.unsig; | |
888 | ||
889 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
890 | return 0; | |
891 | ||
892 | case JSON_VARIANT_REAL: { | |
893 | intmax_t converted; | |
894 | ||
895 | converted = (intmax_t) v->value.real; | |
896 | ||
6a5b28de | 897 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 898 | if ((long double) converted == v->value.real) |
cd0b6c53 | 899 | return converted; |
6a5b28de | 900 | REENABLE_WARNING; |
cd0b6c53 LP |
901 | |
902 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
903 | return 0; | |
904 | } | |
905 | ||
906 | default: | |
907 | break; | |
908 | } | |
909 | ||
910 | mismatch: | |
911 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
912 | return 0; | |
913 | } | |
914 | ||
915 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
916 | if (!v) | |
917 | goto mismatch; | |
918 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
919 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
920 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
921 | return 0; | |
d520d519 | 922 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
923 | goto mismatch; |
924 | if (v->is_reference) | |
925 | return json_variant_integer(v->reference); | |
926 | ||
927 | switch (v->type) { | |
928 | ||
929 | case JSON_VARIANT_INTEGER: | |
930 | if (v->value.integer >= 0) | |
931 | return (uintmax_t) v->value.integer; | |
932 | ||
933 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
934 | return 0; | |
935 | ||
936 | case JSON_VARIANT_UNSIGNED: | |
937 | return v->value.unsig; | |
938 | ||
939 | case JSON_VARIANT_REAL: { | |
940 | uintmax_t converted; | |
941 | ||
942 | converted = (uintmax_t) v->value.real; | |
943 | ||
6a5b28de | 944 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 945 | if ((long double) converted == v->value.real) |
cd0b6c53 | 946 | return converted; |
6a5b28de | 947 | REENABLE_WARNING; |
cd0b6c53 LP |
948 | |
949 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
950 | return 0; | |
951 | } | |
952 | ||
953 | default: | |
954 | break; | |
955 | } | |
956 | ||
957 | mismatch: | |
958 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
959 | return 0; | |
960 | } | |
961 | ||
962 | long double json_variant_real(JsonVariant *v) { | |
963 | if (!v) | |
964 | return 0.0; | |
965 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
966 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
967 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
968 | return 0.0; | |
d520d519 | 969 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
970 | goto mismatch; |
971 | if (v->is_reference) | |
972 | return json_variant_real(v->reference); | |
973 | ||
974 | switch (v->type) { | |
975 | ||
976 | case JSON_VARIANT_REAL: | |
977 | return v->value.real; | |
978 | ||
979 | case JSON_VARIANT_INTEGER: { | |
980 | long double converted; | |
981 | ||
982 | converted = (long double) v->value.integer; | |
983 | ||
984 | if ((intmax_t) converted == v->value.integer) | |
985 | return converted; | |
986 | ||
987 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
988 | return 0.0; | |
989 | } | |
990 | ||
991 | case JSON_VARIANT_UNSIGNED: { | |
992 | long double converted; | |
993 | ||
994 | converted = (long double) v->value.unsig; | |
995 | ||
996 | if ((uintmax_t) converted == v->value.unsig) | |
997 | return converted; | |
998 | ||
999 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
1000 | return 0.0; | |
1001 | } | |
1002 | ||
1003 | default: | |
1004 | break; | |
1005 | } | |
1006 | ||
1007 | mismatch: | |
1008 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 1009 | return 0.0; |
cd0b6c53 LP |
1010 | } |
1011 | ||
1012 | bool json_variant_is_negative(JsonVariant *v) { | |
1013 | if (!v) | |
1014 | goto mismatch; | |
1015 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
1016 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
1017 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1018 | return false; | |
d520d519 | 1019 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1020 | goto mismatch; |
1021 | if (v->is_reference) | |
1022 | return json_variant_is_negative(v->reference); | |
1023 | ||
1024 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
1025 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
1026 | * values. */ | |
1027 | ||
1028 | switch (v->type) { | |
1029 | ||
1030 | case JSON_VARIANT_REAL: | |
1031 | return v->value.real < 0; | |
1032 | ||
1033 | case JSON_VARIANT_INTEGER: | |
1034 | return v->value.integer < 0; | |
1035 | ||
1036 | case JSON_VARIANT_UNSIGNED: | |
1037 | return false; | |
1038 | ||
1039 | default: | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | mismatch: | |
1044 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
1045 | return false; | |
1046 | } | |
1047 | ||
e787b211 LP |
1048 | bool json_variant_is_blank_object(JsonVariant *v) { |
1049 | /* Returns true if the specified object is null or empty */ | |
1050 | return !v || | |
1051 | json_variant_is_null(v) || | |
1052 | (json_variant_is_object(v) && json_variant_elements(v) == 0); | |
1053 | } | |
1054 | ||
1055 | bool json_variant_is_blank_array(JsonVariant *v) { | |
1056 | return !v || | |
1057 | json_variant_is_null(v) || | |
1058 | (json_variant_is_array(v) && json_variant_elements(v) == 0); | |
1059 | } | |
1060 | ||
cd0b6c53 LP |
1061 | JsonVariantType json_variant_type(JsonVariant *v) { |
1062 | ||
1063 | if (!v) | |
1064 | return _JSON_VARIANT_TYPE_INVALID; | |
1065 | ||
d520d519 LP |
1066 | if (json_variant_is_const_string(v)) |
1067 | return JSON_VARIANT_STRING; | |
1068 | ||
cd0b6c53 LP |
1069 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
1070 | return JSON_VARIANT_BOOLEAN; | |
1071 | ||
1072 | if (v == JSON_VARIANT_MAGIC_NULL) | |
1073 | return JSON_VARIANT_NULL; | |
1074 | ||
1075 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
1076 | return JSON_VARIANT_INTEGER; | |
1077 | ||
1078 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
1079 | return JSON_VARIANT_UNSIGNED; | |
1080 | ||
1081 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
1082 | return JSON_VARIANT_REAL; | |
1083 | ||
1084 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
1085 | return JSON_VARIANT_STRING; | |
1086 | ||
1087 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
1088 | return JSON_VARIANT_ARRAY; | |
1089 | ||
1090 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1091 | return JSON_VARIANT_OBJECT; | |
1092 | ||
1093 | return v->type; | |
1094 | } | |
1095 | ||
8e2fa6e2 | 1096 | _function_no_sanitize_float_cast_overflow_ bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { |
cd0b6c53 LP |
1097 | JsonVariantType rt; |
1098 | ||
8e2fa6e2 LP |
1099 | /* Note: we turn off ubsan float cast overflo detection for this function, since it would complain |
1100 | * about our float casts but we do them explicitly to detect conversion errors. */ | |
1101 | ||
cd0b6c53 | 1102 | v = json_variant_dereference(v); |
f8c186c9 LP |
1103 | if (!v) |
1104 | return false; | |
cd0b6c53 LP |
1105 | |
1106 | rt = json_variant_type(v); | |
1107 | if (rt == type) | |
1108 | return true; | |
1109 | ||
d520d519 LP |
1110 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
1111 | if (json_variant_is_const_string(v)) | |
1112 | return false; | |
1113 | ||
cd0b6c53 LP |
1114 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
1115 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
1116 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
1117 | return true; | |
1118 | ||
1119 | /* All other magic variant types are only equal to themselves */ | |
1120 | if (json_variant_is_magic(v)) | |
1121 | return false; | |
1122 | ||
1123 | /* Handle the "number" pseudo type */ | |
1124 | if (type == JSON_VARIANT_NUMBER) | |
1125 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1126 | ||
1127 | /* Integer conversions are OK in many cases */ | |
1128 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1129 | return v->value.integer >= 0; | |
1130 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1131 | return v->value.unsig <= INTMAX_MAX; | |
1132 | ||
1133 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1134 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1135 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1136 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1137 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1138 | ||
6a5b28de LP |
1139 | DISABLE_WARNING_FLOAT_EQUAL; |
1140 | ||
cd0b6c53 LP |
1141 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ |
1142 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1143 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1144 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1145 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
6a5b28de LP |
1146 | |
1147 | REENABLE_WARNING; | |
cd0b6c53 LP |
1148 | |
1149 | return false; | |
1150 | } | |
1151 | ||
1152 | size_t json_variant_elements(JsonVariant *v) { | |
1153 | if (!v) | |
1154 | return 0; | |
1155 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1156 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1157 | return 0; | |
d520d519 | 1158 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1159 | goto mismatch; |
1160 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1161 | goto mismatch; | |
1162 | if (v->is_reference) | |
1163 | return json_variant_elements(v->reference); | |
1164 | ||
1165 | return v->n_elements; | |
1166 | ||
1167 | mismatch: | |
1168 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1173 | if (!v) | |
1174 | return NULL; | |
1175 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1176 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1177 | return NULL; | |
d520d519 | 1178 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1179 | goto mismatch; |
1180 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1181 | goto mismatch; | |
1182 | if (v->is_reference) | |
1183 | return json_variant_by_index(v->reference, idx); | |
1184 | if (idx >= v->n_elements) | |
1185 | return NULL; | |
1186 | ||
b7fc90a2 | 1187 | return json_variant_conservative_formalize(v + 1 + idx); |
cd0b6c53 LP |
1188 | |
1189 | mismatch: | |
1190 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1191 | return NULL; | |
1192 | } | |
1193 | ||
1194 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1195 | size_t i; | |
1196 | ||
1197 | if (!v) | |
1198 | goto not_found; | |
1199 | if (!key) | |
1200 | goto not_found; | |
1201 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1202 | goto not_found; | |
d520d519 | 1203 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1204 | goto mismatch; |
1205 | if (v->type != JSON_VARIANT_OBJECT) | |
1206 | goto mismatch; | |
1207 | if (v->is_reference) | |
1208 | return json_variant_by_key(v->reference, key); | |
1209 | ||
b7fc90a2 LP |
1210 | if (v->sorted) { |
1211 | size_t a = 0, b = v->n_elements/2; | |
1212 | ||
1213 | /* If the variant is sorted we can use bisection to find the entry we need in O(log(n)) time */ | |
1214 | ||
1215 | while (b > a) { | |
1216 | JsonVariant *p; | |
1217 | const char *f; | |
1218 | int c; | |
1219 | ||
1220 | i = (a + b) / 2; | |
1221 | p = json_variant_dereference(v + 1 + i*2); | |
1222 | ||
1223 | assert_se(f = json_variant_string(p)); | |
1224 | ||
1225 | c = strcmp(key, f); | |
1226 | if (c == 0) { | |
1227 | if (ret_key) | |
1228 | *ret_key = json_variant_conservative_formalize(v + 1 + i*2); | |
1229 | ||
1230 | return json_variant_conservative_formalize(v + 1 + i*2 + 1); | |
1231 | } else if (c < 0) | |
1232 | b = i; | |
1233 | else | |
1234 | a = i + 1; | |
1235 | } | |
1236 | ||
1237 | goto not_found; | |
1238 | } | |
1239 | ||
1240 | /* The variant is not sorted, hence search for the field linearly */ | |
cd0b6c53 LP |
1241 | for (i = 0; i < v->n_elements; i += 2) { |
1242 | JsonVariant *p; | |
1243 | ||
1244 | p = json_variant_dereference(v + 1 + i); | |
1245 | ||
1246 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1247 | continue; | |
1248 | ||
1249 | if (streq(json_variant_string(p), key)) { | |
1250 | ||
1251 | if (ret_key) | |
b7fc90a2 | 1252 | *ret_key = json_variant_conservative_formalize(v + 1 + i); |
cd0b6c53 | 1253 | |
b7fc90a2 | 1254 | return json_variant_conservative_formalize(v + 1 + i + 1); |
cd0b6c53 LP |
1255 | } |
1256 | } | |
1257 | ||
1258 | not_found: | |
1259 | if (ret_key) | |
1260 | *ret_key = NULL; | |
1261 | ||
1262 | return NULL; | |
1263 | ||
1264 | mismatch: | |
1265 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1266 | if (ret_key) | |
1267 | *ret_key = NULL; | |
1268 | ||
1269 | return NULL; | |
1270 | } | |
1271 | ||
1272 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1273 | return json_variant_by_key_full(v, key, NULL); | |
1274 | } | |
1275 | ||
1276 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1277 | JsonVariantType t; | |
1278 | ||
b7fc90a2 LP |
1279 | a = json_variant_formalize(a); |
1280 | b = json_variant_formalize(b); | |
cd0b6c53 LP |
1281 | |
1282 | if (a == b) | |
1283 | return true; | |
1284 | ||
1285 | t = json_variant_type(a); | |
1286 | if (!json_variant_has_type(b, t)) | |
1287 | return false; | |
1288 | ||
1289 | switch (t) { | |
1290 | ||
1291 | case JSON_VARIANT_STRING: | |
1292 | return streq(json_variant_string(a), json_variant_string(b)); | |
1293 | ||
1294 | case JSON_VARIANT_INTEGER: | |
1295 | return json_variant_integer(a) == json_variant_integer(b); | |
1296 | ||
1297 | case JSON_VARIANT_UNSIGNED: | |
1298 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1299 | ||
1300 | case JSON_VARIANT_REAL: | |
6a5b28de | 1301 | DISABLE_WARNING_FLOAT_EQUAL; |
cd0b6c53 | 1302 | return json_variant_real(a) == json_variant_real(b); |
6a5b28de | 1303 | REENABLE_WARNING; |
cd0b6c53 LP |
1304 | |
1305 | case JSON_VARIANT_BOOLEAN: | |
1306 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1307 | ||
1308 | case JSON_VARIANT_NULL: | |
1309 | return true; | |
1310 | ||
1311 | case JSON_VARIANT_ARRAY: { | |
1312 | size_t i, n; | |
1313 | ||
1314 | n = json_variant_elements(a); | |
1315 | if (n != json_variant_elements(b)) | |
1316 | return false; | |
1317 | ||
1318 | for (i = 0; i < n; i++) { | |
1319 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1320 | return false; | |
1321 | } | |
1322 | ||
1323 | return true; | |
1324 | } | |
1325 | ||
1326 | case JSON_VARIANT_OBJECT: { | |
1327 | size_t i, n; | |
1328 | ||
1329 | n = json_variant_elements(a); | |
1330 | if (n != json_variant_elements(b)) | |
1331 | return false; | |
1332 | ||
1333 | /* Iterate through all keys in 'a' */ | |
1334 | for (i = 0; i < n; i += 2) { | |
1335 | bool found = false; | |
1336 | size_t j; | |
1337 | ||
1338 | /* Match them against all keys in 'b' */ | |
1339 | for (j = 0; j < n; j += 2) { | |
1340 | JsonVariant *key_b; | |
1341 | ||
1342 | key_b = json_variant_by_index(b, j); | |
1343 | ||
1344 | /* During the first iteration unmark everything */ | |
1345 | if (i == 0) | |
1346 | key_b->is_marked = false; | |
1347 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1348 | continue; | |
1349 | ||
1350 | if (found) | |
1351 | continue; | |
1352 | ||
1353 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1354 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1355 | /* Key and values match! */ | |
1356 | key_b->is_marked = found = true; | |
1357 | ||
1358 | /* In the first iteration we continue the inner loop since we want to mark | |
1359 | * everything, otherwise exit the loop quickly after we found what we were | |
1360 | * looking for. */ | |
1361 | if (i != 0) | |
1362 | break; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | if (!found) | |
1367 | return false; | |
1368 | } | |
1369 | ||
1370 | return true; | |
1371 | } | |
1372 | ||
1373 | default: | |
1374 | assert_not_reached("Unknown variant type."); | |
1375 | } | |
1376 | } | |
1377 | ||
83bc6cb7 LP |
1378 | void json_variant_sensitive(JsonVariant *v) { |
1379 | assert(v); | |
1380 | ||
1381 | /* Marks a variant as "sensitive", so that it is erased from memory when it is destroyed. This is a | |
1382 | * one-way operation: as soon as it is marked this way it remains marked this way until it's | |
162392b7 | 1383 | * destroyed. A magic variant is never sensitive though, even when asked, since it's too |
83bc6cb7 LP |
1384 | * basic. Similar, const string variant are never sensitive either, after all they are included in |
1385 | * the source code as they are, which is not suitable for inclusion of secrets. | |
1386 | * | |
1387 | * Note that this flag has a recursive effect: when we destroy an object or array we'll propagate the | |
1388 | * flag to all contained variants. And if those are then destroyed this is propagated further down, | |
1389 | * and so on. */ | |
1390 | ||
b7fc90a2 | 1391 | v = json_variant_formalize(v); |
83bc6cb7 LP |
1392 | if (!json_variant_is_regular(v)) |
1393 | return; | |
1394 | ||
1395 | v->sensitive = true; | |
1396 | } | |
1397 | ||
94600eeb LP |
1398 | bool json_variant_is_sensitive(JsonVariant *v) { |
1399 | v = json_variant_formalize(v); | |
1400 | if (!json_variant_is_regular(v)) | |
1401 | return false; | |
1402 | ||
1403 | return v->sensitive; | |
1404 | } | |
1405 | ||
1406 | static void json_variant_propagate_sensitive(JsonVariant *from, JsonVariant *to) { | |
1407 | if (json_variant_is_sensitive(from)) | |
1408 | json_variant_sensitive(to); | |
1409 | } | |
1410 | ||
cd0b6c53 LP |
1411 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { |
1412 | assert_return(v, -EINVAL); | |
1413 | ||
1414 | if (ret_source) | |
d520d519 | 1415 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1416 | |
1417 | if (ret_line) | |
d520d519 | 1418 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1419 | |
1420 | if (ret_column) | |
d520d519 | 1421 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1422 | |
1423 | return 0; | |
1424 | } | |
1425 | ||
897f099b | 1426 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1427 | size_t w, k; |
1428 | ||
1429 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1430 | return 0; | |
1431 | ||
d520d519 | 1432 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1433 | return 0; |
1434 | ||
1435 | if (!v->source && v->line == 0 && v->column == 0) | |
1436 | return 0; | |
1437 | ||
1438 | /* The max width we need to format the line numbers for this source file */ | |
1439 | w = (v->source && v->source->max_line > 0) ? | |
1440 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1441 | DECIMAL_STR_MAX(unsigned)-1; | |
1442 | k = (v->source && v->source->max_column > 0) ? | |
1443 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1444 | DECIMAL_STR_MAX(unsigned) -1; | |
1445 | ||
1446 | if (whitespace) { | |
1447 | size_t i, n; | |
1448 | ||
1449 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1450 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1451 | (v->line > 0 ? w : 0) + | |
1452 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1453 | (v->column > 0 ? k : 0) + | |
1454 | 2; | |
1455 | ||
1456 | for (i = 0; i < n; i++) | |
1457 | fputc(' ', f); | |
1458 | } else { | |
1459 | fputc('[', f); | |
1460 | ||
1461 | if (v->source) | |
1462 | fputs(v->source->name, f); | |
1463 | if (v->source && (v->line > 0 || v->column > 0)) | |
1464 | fputc(':', f); | |
1465 | if (v->line > 0) | |
1466 | fprintf(f, "%*u", (int) w, v->line); | |
1467 | if ((v->source || v->line > 0) || v->column > 0) | |
1468 | fputc(':', f); | |
1469 | if (v->column > 0) | |
1470 | fprintf(f, "%*u", (int) k, v->column); | |
1471 | ||
1472 | fputc(']', f); | |
1473 | fputc(' ', f); | |
1474 | } | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | ||
897f099b | 1479 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1480 | int r; |
1481 | ||
1482 | assert(f); | |
1483 | assert(v); | |
1484 | ||
1485 | switch (json_variant_type(v)) { | |
1486 | ||
1487 | case JSON_VARIANT_REAL: { | |
1488 | locale_t loc; | |
1489 | ||
1490 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1491 | if (loc == (locale_t) 0) | |
1492 | return -errno; | |
1493 | ||
1494 | if (flags & JSON_FORMAT_COLOR) | |
1495 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1496 | ||
1497 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1498 | ||
1499 | if (flags & JSON_FORMAT_COLOR) | |
1500 | fputs(ANSI_NORMAL, f); | |
1501 | ||
1502 | freelocale(loc); | |
1503 | break; | |
1504 | } | |
1505 | ||
1506 | case JSON_VARIANT_INTEGER: | |
1507 | if (flags & JSON_FORMAT_COLOR) | |
1508 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1509 | ||
1510 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1511 | ||
1512 | if (flags & JSON_FORMAT_COLOR) | |
1513 | fputs(ANSI_NORMAL, f); | |
1514 | break; | |
1515 | ||
1516 | case JSON_VARIANT_UNSIGNED: | |
1517 | if (flags & JSON_FORMAT_COLOR) | |
1518 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1519 | ||
1520 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1521 | ||
1522 | if (flags & JSON_FORMAT_COLOR) | |
1523 | fputs(ANSI_NORMAL, f); | |
1524 | break; | |
1525 | ||
1526 | case JSON_VARIANT_BOOLEAN: | |
1527 | ||
1528 | if (flags & JSON_FORMAT_COLOR) | |
1529 | fputs(ANSI_HIGHLIGHT, f); | |
1530 | ||
1531 | if (json_variant_boolean(v)) | |
1532 | fputs("true", f); | |
1533 | else | |
1534 | fputs("false", f); | |
1535 | ||
1536 | if (flags & JSON_FORMAT_COLOR) | |
1537 | fputs(ANSI_NORMAL, f); | |
1538 | ||
1539 | break; | |
1540 | ||
1541 | case JSON_VARIANT_NULL: | |
1542 | if (flags & JSON_FORMAT_COLOR) | |
1543 | fputs(ANSI_HIGHLIGHT, f); | |
1544 | ||
1545 | fputs("null", f); | |
1546 | ||
1547 | if (flags & JSON_FORMAT_COLOR) | |
1548 | fputs(ANSI_NORMAL, f); | |
1549 | break; | |
1550 | ||
1551 | case JSON_VARIANT_STRING: { | |
1552 | const char *q; | |
1553 | ||
1554 | fputc('"', f); | |
1555 | ||
1556 | if (flags & JSON_FORMAT_COLOR) | |
1557 | fputs(ANSI_GREEN, f); | |
1558 | ||
1559 | for (q = json_variant_string(v); *q; q++) { | |
1560 | ||
1561 | switch (*q) { | |
1562 | ||
1563 | case '"': | |
1564 | fputs("\\\"", f); | |
1565 | break; | |
1566 | ||
1567 | case '\\': | |
1568 | fputs("\\\\", f); | |
1569 | break; | |
1570 | ||
cd0b6c53 LP |
1571 | case '\b': |
1572 | fputs("\\b", f); | |
1573 | break; | |
1574 | ||
1575 | case '\f': | |
1576 | fputs("\\f", f); | |
1577 | break; | |
1578 | ||
1579 | case '\n': | |
1580 | fputs("\\n", f); | |
1581 | break; | |
1582 | ||
1583 | case '\r': | |
1584 | fputs("\\r", f); | |
1585 | break; | |
1586 | ||
1587 | case '\t': | |
1588 | fputs("\\t", f); | |
1589 | break; | |
1590 | ||
1591 | default: | |
df7f9e0b | 1592 | if ((signed char) *q >= 0 && *q < ' ') |
cd0b6c53 LP |
1593 | fprintf(f, "\\u%04x", *q); |
1594 | else | |
1595 | fputc(*q, f); | |
1596 | break; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | if (flags & JSON_FORMAT_COLOR) | |
1601 | fputs(ANSI_NORMAL, f); | |
1602 | ||
1603 | fputc('"', f); | |
1604 | break; | |
1605 | } | |
1606 | ||
1607 | case JSON_VARIANT_ARRAY: { | |
1608 | size_t i, n; | |
1609 | ||
1610 | n = json_variant_elements(v); | |
1611 | ||
1612 | if (n == 0) | |
1613 | fputs("[]", f); | |
1614 | else { | |
4ae7e4e5 | 1615 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1616 | const char *prefix2; |
1617 | ||
1618 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1619 | joined = strjoin(strempty(prefix), "\t"); |
1620 | if (!joined) | |
1621 | return -ENOMEM; | |
1622 | ||
1623 | prefix2 = joined; | |
cd0b6c53 LP |
1624 | fputs("[\n", f); |
1625 | } else { | |
1626 | prefix2 = strempty(prefix); | |
1627 | fputc('[', f); | |
1628 | } | |
1629 | ||
1630 | for (i = 0; i < n; i++) { | |
1631 | JsonVariant *e; | |
1632 | ||
1633 | assert_se(e = json_variant_by_index(v, i)); | |
1634 | ||
1635 | if (i > 0) { | |
1636 | if (flags & JSON_FORMAT_PRETTY) | |
1637 | fputs(",\n", f); | |
1638 | else | |
1639 | fputc(',', f); | |
1640 | } | |
1641 | ||
1642 | if (flags & JSON_FORMAT_PRETTY) { | |
1643 | print_source(f, e, flags, false); | |
1644 | fputs(prefix2, f); | |
1645 | } | |
1646 | ||
1647 | r = json_format(f, e, flags, prefix2); | |
1648 | if (r < 0) | |
1649 | return r; | |
1650 | } | |
1651 | ||
1652 | if (flags & JSON_FORMAT_PRETTY) { | |
1653 | fputc('\n', f); | |
1654 | print_source(f, v, flags, true); | |
1655 | fputs(strempty(prefix), f); | |
1656 | } | |
1657 | ||
1658 | fputc(']', f); | |
1659 | } | |
1660 | break; | |
1661 | } | |
1662 | ||
1663 | case JSON_VARIANT_OBJECT: { | |
1664 | size_t i, n; | |
1665 | ||
1666 | n = json_variant_elements(v); | |
1667 | ||
1668 | if (n == 0) | |
1669 | fputs("{}", f); | |
1670 | else { | |
4ae7e4e5 | 1671 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1672 | const char *prefix2; |
1673 | ||
1674 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1675 | joined = strjoin(strempty(prefix), "\t"); |
1676 | if (!joined) | |
1677 | return -ENOMEM; | |
1678 | ||
1679 | prefix2 = joined; | |
cd0b6c53 LP |
1680 | fputs("{\n", f); |
1681 | } else { | |
1682 | prefix2 = strempty(prefix); | |
1683 | fputc('{', f); | |
1684 | } | |
1685 | ||
1686 | for (i = 0; i < n; i += 2) { | |
1687 | JsonVariant *e; | |
1688 | ||
1689 | e = json_variant_by_index(v, i); | |
1690 | ||
1691 | if (i > 0) { | |
1692 | if (flags & JSON_FORMAT_PRETTY) | |
1693 | fputs(",\n", f); | |
1694 | else | |
1695 | fputc(',', f); | |
1696 | } | |
1697 | ||
1698 | if (flags & JSON_FORMAT_PRETTY) { | |
1699 | print_source(f, e, flags, false); | |
1700 | fputs(prefix2, f); | |
1701 | } | |
1702 | ||
1703 | r = json_format(f, e, flags, prefix2); | |
1704 | if (r < 0) | |
1705 | return r; | |
1706 | ||
1707 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1708 | ||
1709 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1710 | if (r < 0) | |
1711 | return r; | |
1712 | } | |
1713 | ||
1714 | if (flags & JSON_FORMAT_PRETTY) { | |
1715 | fputc('\n', f); | |
1716 | print_source(f, v, flags, true); | |
1717 | fputs(strempty(prefix), f); | |
1718 | } | |
1719 | ||
1720 | fputc('}', f); | |
1721 | } | |
1722 | break; | |
1723 | } | |
1724 | ||
1725 | default: | |
1726 | assert_not_reached("Unexpected variant type."); | |
1727 | } | |
1728 | ||
1729 | return 0; | |
1730 | } | |
1731 | ||
897f099b | 1732 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1733 | _cleanup_free_ char *s = NULL; |
1734 | size_t sz = 0; | |
1735 | int r; | |
1736 | ||
2a04712c ZJS |
1737 | /* Returns the length of the generated string (without the terminating NUL), |
1738 | * or negative on error. */ | |
1739 | ||
cd0b6c53 LP |
1740 | assert_return(v, -EINVAL); |
1741 | assert_return(ret, -EINVAL); | |
1742 | ||
1743 | { | |
1744 | _cleanup_fclose_ FILE *f = NULL; | |
1745 | ||
2fe21124 | 1746 | f = open_memstream_unlocked(&s, &sz); |
cd0b6c53 LP |
1747 | if (!f) |
1748 | return -ENOMEM; | |
1749 | ||
cd0b6c53 LP |
1750 | json_variant_dump(v, flags, f, NULL); |
1751 | ||
2a04712c ZJS |
1752 | /* Add terminating 0, so that the output buffer is a valid string. */ |
1753 | fputc('\0', f); | |
1754 | ||
cd0b6c53 LP |
1755 | r = fflush_and_check(f); |
1756 | } | |
1757 | if (r < 0) | |
1758 | return r; | |
1759 | ||
1760 | assert(s); | |
1761 | *ret = TAKE_PTR(s); | |
2a04712c ZJS |
1762 | assert(sz > 0); |
1763 | return (int) sz - 1; | |
cd0b6c53 LP |
1764 | } |
1765 | ||
897f099b | 1766 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1767 | if (!v) |
1768 | return; | |
1769 | ||
1770 | if (!f) | |
1771 | f = stdout; | |
1772 | ||
1773 | print_source(f, v, flags, false); | |
1774 | ||
ab91733c LP |
1775 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1776 | flags |= JSON_FORMAT_COLOR; | |
1777 | ||
2d814304 LP |
1778 | if (((flags & (JSON_FORMAT_PRETTY_AUTO|JSON_FORMAT_PRETTY)) == JSON_FORMAT_PRETTY_AUTO)) |
1779 | flags |= on_tty() ? JSON_FORMAT_PRETTY : JSON_FORMAT_NEWLINE; | |
1780 | ||
cd0b6c53 LP |
1781 | if (flags & JSON_FORMAT_SSE) |
1782 | fputs("data: ", f); | |
1783 | if (flags & JSON_FORMAT_SEQ) | |
1784 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1785 | ||
1786 | json_format(f, v, flags, prefix); | |
1787 | ||
1788 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1789 | fputc('\n', f); | |
1790 | if (flags & JSON_FORMAT_SSE) | |
1791 | fputc('\n', f); /* In case of SSE add a second newline */ | |
0b1f2e8a LP |
1792 | |
1793 | if (flags & JSON_FORMAT_FLUSH) | |
1794 | fflush(f); | |
cd0b6c53 LP |
1795 | } |
1796 | ||
f2ff34ff LP |
1797 | int json_variant_filter(JsonVariant **v, char **to_remove) { |
1798 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
1799 | _cleanup_free_ JsonVariant **array = NULL; | |
1800 | size_t i, n = 0, k = 0; | |
1801 | int r; | |
1802 | ||
1803 | assert(v); | |
1804 | ||
1805 | if (json_variant_is_blank_object(*v)) | |
1806 | return 0; | |
1807 | if (!json_variant_is_object(*v)) | |
1808 | return -EINVAL; | |
1809 | ||
1810 | if (strv_isempty(to_remove)) | |
1811 | return 0; | |
1812 | ||
1813 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1814 | JsonVariant *p; | |
1815 | ||
1816 | p = json_variant_by_index(*v, i); | |
1817 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1818 | return -EINVAL; | |
1819 | ||
1820 | if (strv_contains(to_remove, json_variant_string(p))) { | |
1821 | if (!array) { | |
1822 | array = new(JsonVariant*, json_variant_elements(*v) - 2); | |
1823 | if (!array) | |
1824 | return -ENOMEM; | |
1825 | ||
1826 | for (k = 0; k < i; k++) | |
1827 | array[k] = json_variant_by_index(*v, k); | |
1828 | } | |
1829 | ||
1830 | n++; | |
1831 | } else if (array) { | |
1832 | array[k++] = p; | |
1833 | array[k++] = json_variant_by_index(*v, i + 1); | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | if (n == 0) | |
1838 | return 0; | |
1839 | ||
1840 | r = json_variant_new_object(&w, array, k); | |
1841 | if (r < 0) | |
1842 | return r; | |
1843 | ||
94600eeb LP |
1844 | json_variant_propagate_sensitive(*v, w); |
1845 | ||
f2ff34ff LP |
1846 | json_variant_unref(*v); |
1847 | *v = TAKE_PTR(w); | |
1848 | ||
1849 | return (int) n; | |
1850 | } | |
1851 | ||
78a41236 LP |
1852 | int json_variant_set_field(JsonVariant **v, const char *field, JsonVariant *value) { |
1853 | _cleanup_(json_variant_unrefp) JsonVariant *field_variant = NULL, *w = NULL; | |
1854 | _cleanup_free_ JsonVariant **array = NULL; | |
1855 | size_t i, k = 0; | |
1856 | int r; | |
1857 | ||
1858 | assert(v); | |
1859 | assert(field); | |
1860 | ||
1861 | if (json_variant_is_blank_object(*v)) { | |
1862 | array = new(JsonVariant*, 2); | |
1863 | if (!array) | |
1864 | return -ENOMEM; | |
1865 | ||
1866 | } else { | |
1867 | if (!json_variant_is_object(*v)) | |
1868 | return -EINVAL; | |
1869 | ||
1870 | for (i = 0; i < json_variant_elements(*v); i += 2) { | |
1871 | JsonVariant *p; | |
1872 | ||
1873 | p = json_variant_by_index(*v, i); | |
1874 | if (!json_variant_is_string(p)) | |
1875 | return -EINVAL; | |
1876 | ||
1877 | if (streq(json_variant_string(p), field)) { | |
1878 | ||
1879 | if (!array) { | |
1880 | array = new(JsonVariant*, json_variant_elements(*v)); | |
1881 | if (!array) | |
1882 | return -ENOMEM; | |
1883 | ||
1884 | for (k = 0; k < i; k++) | |
1885 | array[k] = json_variant_by_index(*v, k); | |
1886 | } | |
1887 | ||
1888 | } else if (array) { | |
1889 | array[k++] = p; | |
1890 | array[k++] = json_variant_by_index(*v, i + 1); | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | if (!array) { | |
1895 | array = new(JsonVariant*, json_variant_elements(*v) + 2); | |
1896 | if (!array) | |
1897 | return -ENOMEM; | |
1898 | ||
1899 | for (k = 0; k < json_variant_elements(*v); k++) | |
1900 | array[k] = json_variant_by_index(*v, k); | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | r = json_variant_new_string(&field_variant, field); | |
1905 | if (r < 0) | |
1906 | return r; | |
1907 | ||
1908 | array[k++] = field_variant; | |
1909 | array[k++] = value; | |
1910 | ||
1911 | r = json_variant_new_object(&w, array, k); | |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
94600eeb LP |
1915 | json_variant_propagate_sensitive(*v, w); |
1916 | ||
78a41236 LP |
1917 | json_variant_unref(*v); |
1918 | *v = TAKE_PTR(w); | |
1919 | ||
1920 | return 1; | |
1921 | } | |
1922 | ||
15f1fb3e LP |
1923 | int json_variant_set_field_string(JsonVariant **v, const char *field, const char *value) { |
1924 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1925 | int r; | |
1926 | ||
1927 | r = json_variant_new_string(&m, value); | |
1928 | if (r < 0) | |
1929 | return r; | |
1930 | ||
1931 | return json_variant_set_field(v, field, m); | |
1932 | } | |
1933 | ||
a832b08e LP |
1934 | int json_variant_set_field_integer(JsonVariant **v, const char *field, intmax_t i) { |
1935 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1936 | int r; | |
1937 | ||
1938 | r = json_variant_new_integer(&m, i); | |
1939 | if (r < 0) | |
1940 | return r; | |
1941 | ||
1942 | return json_variant_set_field(v, field, m); | |
1943 | } | |
1944 | ||
15f1fb3e LP |
1945 | int json_variant_set_field_unsigned(JsonVariant **v, const char *field, uintmax_t u) { |
1946 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1947 | int r; | |
1948 | ||
1949 | r = json_variant_new_unsigned(&m, u); | |
1950 | if (r < 0) | |
1951 | return r; | |
1952 | ||
1953 | return json_variant_set_field(v, field, m); | |
1954 | } | |
1955 | ||
a832b08e LP |
1956 | int json_variant_set_field_boolean(JsonVariant **v, const char *field, bool b) { |
1957 | _cleanup_(json_variant_unrefp) JsonVariant *m = NULL; | |
1958 | int r; | |
1959 | ||
1960 | r = json_variant_new_boolean(&m, b); | |
1961 | if (r < 0) | |
1962 | return r; | |
1963 | ||
1964 | return json_variant_set_field(v, field, m); | |
1965 | } | |
1966 | ||
ca409a59 LP |
1967 | int json_variant_merge(JsonVariant **v, JsonVariant *m) { |
1968 | _cleanup_(json_variant_unrefp) JsonVariant *w = NULL; | |
1969 | _cleanup_free_ JsonVariant **array = NULL; | |
1970 | size_t v_elements, m_elements, i, k; | |
1971 | bool v_blank, m_blank; | |
1972 | int r; | |
1973 | ||
1974 | m = json_variant_dereference(m); | |
1975 | ||
1976 | v_blank = json_variant_is_blank_object(*v); | |
1977 | m_blank = json_variant_is_blank_object(m); | |
1978 | ||
1979 | if (!v_blank && !json_variant_is_object(*v)) | |
1980 | return -EINVAL; | |
1981 | if (!m_blank && !json_variant_is_object(m)) | |
1982 | return -EINVAL; | |
1983 | ||
1984 | if (m_blank) | |
1985 | return 0; /* nothing to do */ | |
1986 | ||
1987 | if (v_blank) { | |
1988 | json_variant_unref(*v); | |
1989 | *v = json_variant_ref(m); | |
1990 | return 1; | |
1991 | } | |
1992 | ||
1993 | v_elements = json_variant_elements(*v); | |
1994 | m_elements = json_variant_elements(m); | |
1995 | if (v_elements > SIZE_MAX - m_elements) /* overflow check */ | |
1996 | return -ENOMEM; | |
1997 | ||
1998 | array = new(JsonVariant*, v_elements + m_elements); | |
1999 | if (!array) | |
2000 | return -ENOMEM; | |
2001 | ||
2002 | k = 0; | |
2003 | for (i = 0; i < v_elements; i += 2) { | |
2004 | JsonVariant *u; | |
2005 | ||
2006 | u = json_variant_by_index(*v, i); | |
2007 | if (!json_variant_is_string(u)) | |
2008 | return -EINVAL; | |
2009 | ||
2010 | if (json_variant_by_key(m, json_variant_string(u))) | |
2011 | continue; /* skip if exists in second variant */ | |
2012 | ||
2013 | array[k++] = u; | |
2014 | array[k++] = json_variant_by_index(*v, i + 1); | |
2015 | } | |
2016 | ||
2017 | for (i = 0; i < m_elements; i++) | |
2018 | array[k++] = json_variant_by_index(m, i); | |
2019 | ||
2020 | r = json_variant_new_object(&w, array, k); | |
2021 | if (r < 0) | |
2022 | return r; | |
2023 | ||
94600eeb LP |
2024 | json_variant_propagate_sensitive(*v, w); |
2025 | json_variant_propagate_sensitive(m, w); | |
2026 | ||
ca409a59 LP |
2027 | json_variant_unref(*v); |
2028 | *v = TAKE_PTR(w); | |
2029 | ||
2030 | return 1; | |
2031 | } | |
2032 | ||
21e21511 LP |
2033 | int json_variant_append_array(JsonVariant **v, JsonVariant *element) { |
2034 | _cleanup_(json_variant_unrefp) JsonVariant *nv = NULL; | |
2035 | bool blank; | |
2036 | int r; | |
2037 | ||
2038 | assert(v); | |
2039 | assert(element); | |
2040 | ||
2041 | ||
2042 | if (!*v || json_variant_is_null(*v)) | |
2043 | blank = true; | |
2044 | else if (!json_variant_is_array(*v)) | |
2045 | return -EINVAL; | |
2046 | else | |
2047 | blank = json_variant_elements(*v) == 0; | |
2048 | ||
2049 | if (blank) | |
2050 | r = json_variant_new_array(&nv, (JsonVariant*[]) { element }, 1); | |
2051 | else { | |
2052 | _cleanup_free_ JsonVariant **array = NULL; | |
2053 | size_t i; | |
2054 | ||
2055 | array = new(JsonVariant*, json_variant_elements(*v) + 1); | |
2056 | if (!array) | |
2057 | return -ENOMEM; | |
2058 | ||
2059 | for (i = 0; i < json_variant_elements(*v); i++) | |
2060 | array[i] = json_variant_by_index(*v, i); | |
2061 | ||
2062 | array[i] = element; | |
2063 | ||
2064 | r = json_variant_new_array(&nv, array, i + 1); | |
2065 | } | |
21e21511 LP |
2066 | if (r < 0) |
2067 | return r; | |
2068 | ||
94600eeb LP |
2069 | json_variant_propagate_sensitive(*v, nv); |
2070 | ||
21e21511 LP |
2071 | json_variant_unref(*v); |
2072 | *v = TAKE_PTR(nv); | |
2073 | ||
2074 | return 0; | |
2075 | } | |
2076 | ||
22f14d6b LP |
2077 | int json_variant_strv(JsonVariant *v, char ***ret) { |
2078 | char **l = NULL; | |
2079 | size_t n, i; | |
2080 | bool sensitive; | |
2081 | int r; | |
2082 | ||
2083 | assert(ret); | |
2084 | ||
2085 | if (!v || json_variant_is_null(v)) { | |
2086 | l = new0(char*, 1); | |
2087 | if (!l) | |
2088 | return -ENOMEM; | |
2089 | ||
2090 | *ret = l; | |
2091 | return 0; | |
2092 | } | |
2093 | ||
2094 | if (!json_variant_is_array(v)) | |
2095 | return -EINVAL; | |
2096 | ||
2097 | sensitive = v->sensitive; | |
2098 | ||
2099 | n = json_variant_elements(v); | |
2100 | l = new(char*, n+1); | |
2101 | if (!l) | |
2102 | return -ENOMEM; | |
2103 | ||
2104 | for (i = 0; i < n; i++) { | |
2105 | JsonVariant *e; | |
2106 | ||
2107 | assert_se(e = json_variant_by_index(v, i)); | |
2108 | sensitive = sensitive || e->sensitive; | |
2109 | ||
2110 | if (!json_variant_is_string(e)) { | |
2111 | l[i] = NULL; | |
2112 | r = -EINVAL; | |
2113 | goto fail; | |
2114 | } | |
2115 | ||
2116 | l[i] = strdup(json_variant_string(e)); | |
2117 | if (!l[i]) { | |
2118 | r = -ENOMEM; | |
2119 | goto fail; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | l[i] = NULL; | |
2124 | *ret = TAKE_PTR(l); | |
2125 | ||
2126 | return 0; | |
2127 | ||
2128 | fail: | |
2129 | if (sensitive) | |
2130 | strv_free_erase(l); | |
2131 | else | |
2132 | strv_free(l); | |
2133 | ||
2134 | return r; | |
2135 | } | |
2136 | ||
cd0b6c53 LP |
2137 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { |
2138 | JsonVariantType t; | |
2139 | JsonVariant *c; | |
2140 | JsonValue value; | |
2141 | const void *source; | |
2142 | size_t k; | |
2143 | ||
2144 | assert(nv); | |
2145 | assert(v); | |
2146 | ||
2147 | /* Let's copy the simple types literally, and the larger types by references */ | |
2148 | t = json_variant_type(v); | |
2149 | switch (t) { | |
2150 | case JSON_VARIANT_INTEGER: | |
2151 | k = sizeof(intmax_t); | |
2152 | value.integer = json_variant_integer(v); | |
2153 | source = &value; | |
2154 | break; | |
2155 | ||
2156 | case JSON_VARIANT_UNSIGNED: | |
2157 | k = sizeof(uintmax_t); | |
2158 | value.unsig = json_variant_unsigned(v); | |
2159 | source = &value; | |
2160 | break; | |
2161 | ||
2162 | case JSON_VARIANT_REAL: | |
2163 | k = sizeof(long double); | |
2164 | value.real = json_variant_real(v); | |
2165 | source = &value; | |
2166 | break; | |
2167 | ||
2168 | case JSON_VARIANT_BOOLEAN: | |
2169 | k = sizeof(bool); | |
2170 | value.boolean = json_variant_boolean(v); | |
2171 | source = &value; | |
2172 | break; | |
2173 | ||
2174 | case JSON_VARIANT_NULL: | |
2175 | k = 0; | |
2176 | source = NULL; | |
2177 | break; | |
2178 | ||
2179 | case JSON_VARIANT_STRING: | |
2180 | source = json_variant_string(v); | |
2181 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
2182 | if (k <= INLINE_STRING_MAX) { | |
2183 | k ++; | |
2184 | break; | |
2185 | } | |
2186 | ||
2187 | _fallthrough_; | |
2188 | ||
2189 | default: | |
2190 | /* Everything else copy by reference */ | |
2191 | ||
2eb1c198 LP |
2192 | c = malloc0(MAX(sizeof(JsonVariant), |
2193 | offsetof(JsonVariant, reference) + sizeof(JsonVariant*))); | |
cd0b6c53 LP |
2194 | if (!c) |
2195 | return -ENOMEM; | |
2196 | ||
2197 | c->n_ref = 1; | |
2198 | c->type = t; | |
2199 | c->is_reference = true; | |
b7fc90a2 | 2200 | c->reference = json_variant_ref(json_variant_formalize(v)); |
cd0b6c53 LP |
2201 | |
2202 | *nv = c; | |
2203 | return 0; | |
2204 | } | |
2205 | ||
2eb1c198 LP |
2206 | c = malloc0(MAX(sizeof(JsonVariant), |
2207 | offsetof(JsonVariant, value) + k)); | |
cd0b6c53 LP |
2208 | if (!c) |
2209 | return -ENOMEM; | |
2210 | ||
2211 | c->n_ref = 1; | |
2212 | c->type = t; | |
2213 | ||
2214 | memcpy_safe(&c->value, source, k); | |
2215 | ||
94600eeb LP |
2216 | json_variant_propagate_sensitive(v, c); |
2217 | ||
cd0b6c53 LP |
2218 | *nv = c; |
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | static bool json_single_ref(JsonVariant *v) { | |
2223 | ||
2224 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
2225 | ||
d520d519 | 2226 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
2227 | return false; |
2228 | ||
2229 | if (v->is_embedded) | |
2230 | return json_single_ref(v->parent); | |
2231 | ||
2232 | assert(v->n_ref > 0); | |
2233 | return v->n_ref == 1; | |
2234 | } | |
2235 | ||
2236 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
2237 | JsonVariant *w; | |
2238 | int r; | |
2239 | ||
2240 | assert(v); | |
2241 | ||
2242 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
2243 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
2244 | ||
2245 | if (!*v) | |
2246 | return 0; | |
2247 | ||
2248 | if (source && line > source->max_line) | |
2249 | source->max_line = line; | |
2250 | if (source && column > source->max_column) | |
2251 | source->max_column = column; | |
2252 | ||
d520d519 | 2253 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
2254 | |
2255 | if (!source && line == 0 && column == 0) | |
2256 | return 0; | |
2257 | ||
2258 | } else { | |
2259 | if (json_source_equal((*v)->source, source) && | |
2260 | (*v)->line == line && | |
2261 | (*v)->column == column) | |
2262 | return 0; | |
2263 | ||
2264 | if (json_single_ref(*v)) { /* Sole reference? */ | |
2265 | json_source_unref((*v)->source); | |
2266 | (*v)->source = json_source_ref(source); | |
2267 | (*v)->line = line; | |
2268 | (*v)->column = column; | |
2269 | return 1; | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | r = json_variant_copy(&w, *v); | |
2274 | if (r < 0) | |
2275 | return r; | |
2276 | ||
d520d519 | 2277 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
2278 | assert(!w->is_embedded); |
2279 | assert(w->n_ref == 1); | |
2280 | assert(!w->source); | |
2281 | ||
2282 | w->source = json_source_ref(source); | |
2283 | w->line = line; | |
2284 | w->column = column; | |
2285 | ||
2286 | json_variant_unref(*v); | |
2287 | *v = w; | |
2288 | ||
2289 | return 1; | |
2290 | } | |
2291 | ||
2292 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
2293 | assert(line); | |
2294 | assert(column); | |
2295 | assert(s || n == 0); | |
2296 | ||
2297 | while (n > 0) { | |
cd0b6c53 LP |
2298 | if (*s == '\n') { |
2299 | (*line)++; | |
2300 | *column = 1; | |
df7f9e0b | 2301 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
2302 | (*column)++; |
2303 | else { | |
2304 | int w; | |
2305 | ||
92e068b4 | 2306 | w = utf8_encoded_valid_unichar(s, n); |
cd0b6c53 LP |
2307 | if (w < 0) /* count invalid unichars as normal characters */ |
2308 | w = 1; | |
2309 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
2310 | w = (int) n; | |
2311 | ||
2312 | (*column)++; | |
2313 | ||
2314 | s += w; | |
2315 | n -= w; | |
2316 | continue; | |
2317 | } | |
2318 | ||
2319 | s++; | |
2320 | n--; | |
2321 | } | |
2322 | } | |
2323 | ||
2324 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
2325 | int aa, bb, cc, dd; | |
2326 | uint16_t x; | |
2327 | ||
2328 | assert(c); | |
2329 | assert(ret); | |
2330 | ||
2331 | aa = unhexchar(c[0]); | |
2332 | if (aa < 0) | |
2333 | return -EINVAL; | |
2334 | ||
2335 | bb = unhexchar(c[1]); | |
2336 | if (bb < 0) | |
2337 | return -EINVAL; | |
2338 | ||
2339 | cc = unhexchar(c[2]); | |
2340 | if (cc < 0) | |
2341 | return -EINVAL; | |
2342 | ||
2343 | dd = unhexchar(c[3]); | |
2344 | if (dd < 0) | |
2345 | return -EINVAL; | |
2346 | ||
2347 | x = ((uint16_t) aa << 12) | | |
2348 | ((uint16_t) bb << 8) | | |
2349 | ((uint16_t) cc << 4) | | |
2350 | ((uint16_t) dd); | |
2351 | ||
2352 | if (x <= 0) | |
2353 | return -EINVAL; | |
2354 | ||
2355 | *ret = x; | |
2356 | ||
2357 | return 0; | |
2358 | } | |
2359 | ||
2360 | static int json_parse_string(const char **p, char **ret) { | |
2361 | _cleanup_free_ char *s = NULL; | |
2362 | size_t n = 0, allocated = 0; | |
2363 | const char *c; | |
2364 | ||
2365 | assert(p); | |
2366 | assert(*p); | |
2367 | assert(ret); | |
2368 | ||
2369 | c = *p; | |
2370 | ||
2371 | if (*c != '"') | |
2372 | return -EINVAL; | |
2373 | ||
2374 | c++; | |
2375 | ||
2376 | for (;;) { | |
2377 | int len; | |
2378 | ||
2379 | /* Check for EOF */ | |
2380 | if (*c == 0) | |
2381 | return -EINVAL; | |
2382 | ||
2383 | /* Check for control characters 0x00..0x1f */ | |
2384 | if (*c > 0 && *c < ' ') | |
2385 | return -EINVAL; | |
2386 | ||
2387 | /* Check for control character 0x7f */ | |
2388 | if (*c == 0x7f) | |
2389 | return -EINVAL; | |
2390 | ||
2391 | if (*c == '"') { | |
2392 | if (!s) { | |
2393 | s = strdup(""); | |
2394 | if (!s) | |
2395 | return -ENOMEM; | |
2396 | } else | |
2397 | s[n] = 0; | |
2398 | ||
2399 | *p = c + 1; | |
2400 | ||
490c5a37 | 2401 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
2402 | return JSON_TOKEN_STRING; |
2403 | } | |
2404 | ||
2405 | if (*c == '\\') { | |
2406 | char ch = 0; | |
2407 | c++; | |
2408 | ||
2409 | if (*c == 0) | |
2410 | return -EINVAL; | |
2411 | ||
2412 | if (IN_SET(*c, '"', '\\', '/')) | |
2413 | ch = *c; | |
2414 | else if (*c == 'b') | |
2415 | ch = '\b'; | |
2416 | else if (*c == 'f') | |
2417 | ch = '\f'; | |
2418 | else if (*c == 'n') | |
2419 | ch = '\n'; | |
2420 | else if (*c == 'r') | |
2421 | ch = '\r'; | |
2422 | else if (*c == 't') | |
2423 | ch = '\t'; | |
2424 | else if (*c == 'u') { | |
2425 | char16_t x; | |
2426 | int r; | |
2427 | ||
2428 | r = unhex_ucs2(c + 1, &x); | |
2429 | if (r < 0) | |
2430 | return r; | |
2431 | ||
2432 | c += 5; | |
2433 | ||
2434 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
2435 | return -ENOMEM; | |
2436 | ||
2437 | if (!utf16_is_surrogate(x)) | |
2438 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
2439 | else if (utf16_is_trailing_surrogate(x)) | |
2440 | return -EINVAL; | |
2441 | else { | |
2442 | char16_t y; | |
2443 | ||
2444 | if (c[0] != '\\' || c[1] != 'u') | |
2445 | return -EINVAL; | |
2446 | ||
2447 | r = unhex_ucs2(c + 2, &y); | |
2448 | if (r < 0) | |
2449 | return r; | |
2450 | ||
2451 | c += 6; | |
2452 | ||
2453 | if (!utf16_is_trailing_surrogate(y)) | |
2454 | return -EINVAL; | |
2455 | ||
2456 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
2457 | } | |
2458 | ||
2459 | continue; | |
2460 | } else | |
2461 | return -EINVAL; | |
2462 | ||
2463 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
2464 | return -ENOMEM; | |
2465 | ||
2466 | s[n++] = ch; | |
2467 | c ++; | |
2468 | continue; | |
2469 | } | |
2470 | ||
92e068b4 | 2471 | len = utf8_encoded_valid_unichar(c, (size_t) -1); |
cd0b6c53 LP |
2472 | if (len < 0) |
2473 | return len; | |
2474 | ||
2475 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
2476 | return -ENOMEM; | |
2477 | ||
2478 | memcpy(s + n, c, len); | |
2479 | n += len; | |
2480 | c += len; | |
2481 | } | |
2482 | } | |
2483 | ||
2484 | static int json_parse_number(const char **p, JsonValue *ret) { | |
2485 | bool negative = false, exponent_negative = false, is_real = false; | |
2486 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
2487 | intmax_t i = 0; | |
2488 | uintmax_t u = 0; | |
2489 | const char *c; | |
2490 | ||
2491 | assert(p); | |
2492 | assert(*p); | |
2493 | assert(ret); | |
2494 | ||
2495 | c = *p; | |
2496 | ||
2497 | if (*c == '-') { | |
2498 | negative = true; | |
2499 | c++; | |
2500 | } | |
2501 | ||
2502 | if (*c == '0') | |
2503 | c++; | |
2504 | else { | |
2505 | if (!strchr("123456789", *c) || *c == 0) | |
2506 | return -EINVAL; | |
2507 | ||
2508 | do { | |
2509 | if (!is_real) { | |
2510 | if (negative) { | |
2511 | ||
2512 | if (i < INTMAX_MIN / 10) /* overflow */ | |
2513 | is_real = true; | |
2514 | else { | |
2515 | intmax_t t = 10 * i; | |
2516 | ||
2517 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
2518 | is_real = true; | |
2519 | else | |
2520 | i = t - (*c - '0'); | |
2521 | } | |
2522 | } else { | |
2523 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
2524 | is_real = true; | |
2525 | else { | |
2526 | uintmax_t t = 10 * u; | |
2527 | ||
2528 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
2529 | is_real = true; | |
2530 | else | |
2531 | u = t + (*c - '0'); | |
2532 | } | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | x = 10.0 * x + (*c - '0'); | |
2537 | ||
2538 | c++; | |
2539 | } while (strchr("0123456789", *c) && *c != 0); | |
2540 | } | |
2541 | ||
2542 | if (*c == '.') { | |
2543 | is_real = true; | |
2544 | c++; | |
2545 | ||
2546 | if (!strchr("0123456789", *c) || *c == 0) | |
2547 | return -EINVAL; | |
2548 | ||
2549 | do { | |
2550 | y = 10.0 * y + (*c - '0'); | |
2551 | shift = 10.0 * shift; | |
2552 | c++; | |
2553 | } while (strchr("0123456789", *c) && *c != 0); | |
2554 | } | |
2555 | ||
490c5a37 | 2556 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2557 | is_real = true; |
2558 | c++; | |
2559 | ||
2560 | if (*c == '-') { | |
2561 | exponent_negative = true; | |
2562 | c++; | |
2563 | } else if (*c == '+') | |
2564 | c++; | |
2565 | ||
2566 | if (!strchr("0123456789", *c) || *c == 0) | |
2567 | return -EINVAL; | |
2568 | ||
2569 | do { | |
2570 | exponent = 10.0 * exponent + (*c - '0'); | |
2571 | c++; | |
2572 | } while (strchr("0123456789", *c) && *c != 0); | |
2573 | } | |
2574 | ||
2575 | *p = c; | |
2576 | ||
2577 | if (is_real) { | |
2578 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2579 | return JSON_TOKEN_REAL; | |
2580 | } else if (negative) { | |
2581 | ret->integer = i; | |
2582 | return JSON_TOKEN_INTEGER; | |
2583 | } else { | |
2584 | ret->unsig = u; | |
2585 | return JSON_TOKEN_UNSIGNED; | |
2586 | } | |
2587 | } | |
2588 | ||
2589 | int json_tokenize( | |
2590 | const char **p, | |
2591 | char **ret_string, | |
2592 | JsonValue *ret_value, | |
2593 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2594 | unsigned *ret_column, | |
2595 | void **state, | |
2596 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2597 | unsigned *column) { | |
2598 | ||
2599 | unsigned start_line, start_column; | |
2600 | const char *start, *c; | |
2601 | size_t n; | |
2602 | int t, r; | |
2603 | ||
2604 | enum { | |
2605 | STATE_NULL, | |
2606 | STATE_VALUE, | |
2607 | STATE_VALUE_POST, | |
2608 | }; | |
2609 | ||
2610 | assert(p); | |
2611 | assert(*p); | |
2612 | assert(ret_string); | |
2613 | assert(ret_value); | |
2614 | assert(ret_line); | |
2615 | assert(ret_column); | |
2616 | assert(line); | |
2617 | assert(column); | |
2618 | assert(state); | |
2619 | ||
2620 | t = PTR_TO_INT(*state); | |
2621 | if (t == STATE_NULL) { | |
2622 | *line = 1; | |
2623 | *column = 1; | |
2624 | t = STATE_VALUE; | |
2625 | } | |
2626 | ||
2627 | /* Skip over the whitespace */ | |
2628 | n = strspn(*p, WHITESPACE); | |
2629 | inc_lines_columns(line, column, *p, n); | |
2630 | c = *p + n; | |
2631 | ||
2632 | /* Remember where we started processing this token */ | |
2633 | start = c; | |
2634 | start_line = *line; | |
2635 | start_column = *column; | |
2636 | ||
2637 | if (*c == 0) { | |
2638 | *ret_string = NULL; | |
2639 | *ret_value = JSON_VALUE_NULL; | |
2640 | r = JSON_TOKEN_END; | |
2641 | goto finish; | |
2642 | } | |
2643 | ||
2644 | switch (t) { | |
2645 | ||
2646 | case STATE_VALUE: | |
2647 | ||
2648 | if (*c == '{') { | |
2649 | c++; | |
2650 | *state = INT_TO_PTR(STATE_VALUE); | |
2651 | r = JSON_TOKEN_OBJECT_OPEN; | |
2652 | goto null_return; | |
2653 | ||
2654 | } else if (*c == '}') { | |
2655 | c++; | |
2656 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2657 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2658 | goto null_return; | |
2659 | ||
2660 | } else if (*c == '[') { | |
2661 | c++; | |
2662 | *state = INT_TO_PTR(STATE_VALUE); | |
2663 | r = JSON_TOKEN_ARRAY_OPEN; | |
2664 | goto null_return; | |
2665 | ||
2666 | } else if (*c == ']') { | |
2667 | c++; | |
2668 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2669 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2670 | goto null_return; | |
2671 | ||
2672 | } else if (*c == '"') { | |
2673 | ||
2674 | r = json_parse_string(&c, ret_string); | |
2675 | if (r < 0) | |
2676 | return r; | |
2677 | ||
2678 | *ret_value = JSON_VALUE_NULL; | |
2679 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2680 | goto finish; | |
2681 | ||
2682 | } else if (strchr("-0123456789", *c)) { | |
2683 | ||
2684 | r = json_parse_number(&c, ret_value); | |
2685 | if (r < 0) | |
2686 | return r; | |
2687 | ||
2688 | *ret_string = NULL; | |
2689 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2690 | goto finish; | |
2691 | ||
2692 | } else if (startswith(c, "true")) { | |
2693 | *ret_string = NULL; | |
2694 | ret_value->boolean = true; | |
2695 | c += 4; | |
2696 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2697 | r = JSON_TOKEN_BOOLEAN; | |
2698 | goto finish; | |
2699 | ||
2700 | } else if (startswith(c, "false")) { | |
2701 | *ret_string = NULL; | |
2702 | ret_value->boolean = false; | |
2703 | c += 5; | |
2704 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2705 | r = JSON_TOKEN_BOOLEAN; | |
2706 | goto finish; | |
2707 | ||
2708 | } else if (startswith(c, "null")) { | |
2709 | *ret_string = NULL; | |
2710 | *ret_value = JSON_VALUE_NULL; | |
2711 | c += 4; | |
2712 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2713 | r = JSON_TOKEN_NULL; | |
2714 | goto finish; | |
2715 | ||
2716 | } | |
2717 | ||
2718 | return -EINVAL; | |
2719 | ||
2720 | case STATE_VALUE_POST: | |
2721 | ||
2722 | if (*c == ':') { | |
2723 | c++; | |
2724 | *state = INT_TO_PTR(STATE_VALUE); | |
2725 | r = JSON_TOKEN_COLON; | |
2726 | goto null_return; | |
2727 | ||
2728 | } else if (*c == ',') { | |
2729 | c++; | |
2730 | *state = INT_TO_PTR(STATE_VALUE); | |
2731 | r = JSON_TOKEN_COMMA; | |
2732 | goto null_return; | |
2733 | ||
2734 | } else if (*c == '}') { | |
2735 | c++; | |
2736 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2737 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2738 | goto null_return; | |
2739 | ||
2740 | } else if (*c == ']') { | |
2741 | c++; | |
2742 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2743 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2744 | goto null_return; | |
2745 | } | |
2746 | ||
2747 | return -EINVAL; | |
2748 | ||
2749 | default: | |
2750 | assert_not_reached("Unexpected tokenizer state"); | |
2751 | } | |
2752 | ||
2753 | null_return: | |
2754 | *ret_string = NULL; | |
2755 | *ret_value = JSON_VALUE_NULL; | |
2756 | ||
2757 | finish: | |
2758 | inc_lines_columns(line, column, start, c - start); | |
2759 | *p = c; | |
2760 | ||
2761 | *ret_line = start_line; | |
2762 | *ret_column = start_column; | |
2763 | ||
2764 | return r; | |
2765 | } | |
2766 | ||
2767 | typedef enum JsonExpect { | |
2768 | /* The following values are used by json_parse() */ | |
2769 | EXPECT_TOPLEVEL, | |
2770 | EXPECT_END, | |
2771 | EXPECT_OBJECT_FIRST_KEY, | |
2772 | EXPECT_OBJECT_NEXT_KEY, | |
2773 | EXPECT_OBJECT_COLON, | |
2774 | EXPECT_OBJECT_VALUE, | |
2775 | EXPECT_OBJECT_COMMA, | |
2776 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2777 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2778 | EXPECT_ARRAY_COMMA, | |
2779 | ||
2780 | /* And these are used by json_build() */ | |
2781 | EXPECT_ARRAY_ELEMENT, | |
2782 | EXPECT_OBJECT_KEY, | |
2783 | } JsonExpect; | |
2784 | ||
2785 | typedef struct JsonStack { | |
2786 | JsonExpect expect; | |
2787 | JsonVariant **elements; | |
2788 | size_t n_elements, n_elements_allocated; | |
2789 | unsigned line_before; | |
2790 | unsigned column_before; | |
319a4f27 | 2791 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2792 | } JsonStack; |
2793 | ||
2794 | static void json_stack_release(JsonStack *s) { | |
2795 | assert(s); | |
2796 | ||
2797 | json_variant_unref_many(s->elements, s->n_elements); | |
2798 | s->elements = mfree(s->elements); | |
2799 | } | |
2800 | ||
2801 | static int json_parse_internal( | |
2802 | const char **input, | |
2803 | JsonSource *source, | |
d642f640 | 2804 | JsonParseFlags flags, |
cd0b6c53 LP |
2805 | JsonVariant **ret, |
2806 | unsigned *line, | |
2807 | unsigned *column, | |
2808 | bool continue_end) { | |
2809 | ||
2810 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2811 | unsigned line_buffer = 0, column_buffer = 0; | |
2812 | void *tokenizer_state = NULL; | |
2813 | JsonStack *stack = NULL; | |
2814 | const char *p; | |
2815 | int r; | |
2816 | ||
2817 | assert_return(input, -EINVAL); | |
2818 | assert_return(ret, -EINVAL); | |
2819 | ||
2820 | p = *input; | |
2821 | ||
2822 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2823 | return -ENOMEM; | |
2824 | ||
2825 | stack[0] = (JsonStack) { | |
2826 | .expect = EXPECT_TOPLEVEL, | |
2827 | }; | |
2828 | ||
2829 | if (!line) | |
2830 | line = &line_buffer; | |
2831 | if (!column) | |
2832 | column = &column_buffer; | |
2833 | ||
2834 | for (;;) { | |
6980b04f | 2835 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
cd0b6c53 LP |
2836 | _cleanup_free_ char *string = NULL; |
2837 | unsigned line_token, column_token; | |
cd0b6c53 LP |
2838 | JsonStack *current; |
2839 | JsonValue value; | |
2840 | int token; | |
2841 | ||
2842 | assert(n_stack > 0); | |
2843 | current = stack + n_stack - 1; | |
2844 | ||
2845 | if (continue_end && current->expect == EXPECT_END) | |
2846 | goto done; | |
2847 | ||
2848 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2849 | if (token < 0) { | |
2850 | r = token; | |
2851 | goto finish; | |
2852 | } | |
2853 | ||
2854 | switch (token) { | |
2855 | ||
2856 | case JSON_TOKEN_END: | |
2857 | if (current->expect != EXPECT_END) { | |
2858 | r = -EINVAL; | |
2859 | goto finish; | |
2860 | } | |
2861 | ||
2862 | assert(current->n_elements == 1); | |
2863 | assert(n_stack == 1); | |
2864 | goto done; | |
2865 | ||
2866 | case JSON_TOKEN_COLON: | |
2867 | ||
2868 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2869 | r = -EINVAL; | |
2870 | goto finish; | |
2871 | } | |
2872 | ||
2873 | current->expect = EXPECT_OBJECT_VALUE; | |
2874 | break; | |
2875 | ||
2876 | case JSON_TOKEN_COMMA: | |
2877 | ||
2878 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2879 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2880 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2881 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2882 | else { | |
2883 | r = -EINVAL; | |
2884 | goto finish; | |
2885 | } | |
2886 | ||
2887 | break; | |
2888 | ||
2889 | case JSON_TOKEN_OBJECT_OPEN: | |
2890 | ||
2891 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2892 | r = -EINVAL; | |
2893 | goto finish; | |
2894 | } | |
2895 | ||
2896 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2897 | r = -ENOMEM; | |
2898 | goto finish; | |
2899 | } | |
2900 | current = stack + n_stack - 1; | |
2901 | ||
2902 | /* Prepare the expect for when we return from the child */ | |
2903 | if (current->expect == EXPECT_TOPLEVEL) | |
2904 | current->expect = EXPECT_END; | |
2905 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2906 | current->expect = EXPECT_OBJECT_COMMA; | |
2907 | else { | |
2908 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2909 | current->expect = EXPECT_ARRAY_COMMA; | |
2910 | } | |
2911 | ||
2912 | stack[n_stack++] = (JsonStack) { | |
2913 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2914 | .line_before = line_token, | |
2915 | .column_before = column_token, | |
2916 | }; | |
2917 | ||
2918 | current = stack + n_stack - 1; | |
2919 | break; | |
2920 | ||
2921 | case JSON_TOKEN_OBJECT_CLOSE: | |
2922 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2923 | r = -EINVAL; | |
2924 | goto finish; | |
2925 | } | |
2926 | ||
2927 | assert(n_stack > 1); | |
2928 | ||
2929 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2930 | if (r < 0) | |
2931 | goto finish; | |
2932 | ||
2933 | line_token = current->line_before; | |
2934 | column_token = current->column_before; | |
2935 | ||
2936 | json_stack_release(current); | |
2937 | n_stack--, current--; | |
2938 | ||
2939 | break; | |
2940 | ||
2941 | case JSON_TOKEN_ARRAY_OPEN: | |
2942 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2943 | r = -EINVAL; | |
2944 | goto finish; | |
2945 | } | |
2946 | ||
2947 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2948 | r = -ENOMEM; | |
2949 | goto finish; | |
2950 | } | |
2951 | current = stack + n_stack - 1; | |
2952 | ||
2953 | /* Prepare the expect for when we return from the child */ | |
2954 | if (current->expect == EXPECT_TOPLEVEL) | |
2955 | current->expect = EXPECT_END; | |
2956 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2957 | current->expect = EXPECT_OBJECT_COMMA; | |
2958 | else { | |
2959 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2960 | current->expect = EXPECT_ARRAY_COMMA; | |
2961 | } | |
2962 | ||
2963 | stack[n_stack++] = (JsonStack) { | |
2964 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2965 | .line_before = line_token, | |
2966 | .column_before = column_token, | |
2967 | }; | |
2968 | ||
2969 | break; | |
2970 | ||
2971 | case JSON_TOKEN_ARRAY_CLOSE: | |
2972 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2973 | r = -EINVAL; | |
2974 | goto finish; | |
2975 | } | |
2976 | ||
2977 | assert(n_stack > 1); | |
2978 | ||
2979 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2980 | if (r < 0) | |
2981 | goto finish; | |
2982 | ||
2983 | line_token = current->line_before; | |
2984 | column_token = current->column_before; | |
2985 | ||
2986 | json_stack_release(current); | |
2987 | n_stack--, current--; | |
2988 | break; | |
2989 | ||
2990 | case JSON_TOKEN_STRING: | |
2991 | 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)) { | |
2992 | r = -EINVAL; | |
2993 | goto finish; | |
2994 | } | |
2995 | ||
2996 | r = json_variant_new_string(&add, string); | |
2997 | if (r < 0) | |
2998 | goto finish; | |
2999 | ||
3000 | if (current->expect == EXPECT_TOPLEVEL) | |
3001 | current->expect = EXPECT_END; | |
3002 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
3003 | current->expect = EXPECT_OBJECT_COLON; | |
3004 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3005 | current->expect = EXPECT_OBJECT_COMMA; | |
3006 | else { | |
3007 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3008 | current->expect = EXPECT_ARRAY_COMMA; | |
3009 | } | |
3010 | ||
3011 | break; | |
3012 | ||
3013 | case JSON_TOKEN_REAL: | |
3014 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3015 | r = -EINVAL; | |
3016 | goto finish; | |
3017 | } | |
3018 | ||
3019 | r = json_variant_new_real(&add, value.real); | |
3020 | if (r < 0) | |
3021 | goto finish; | |
3022 | ||
3023 | if (current->expect == EXPECT_TOPLEVEL) | |
3024 | current->expect = EXPECT_END; | |
3025 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3026 | current->expect = EXPECT_OBJECT_COMMA; | |
3027 | else { | |
3028 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3029 | current->expect = EXPECT_ARRAY_COMMA; | |
3030 | } | |
3031 | ||
3032 | break; | |
3033 | ||
3034 | case JSON_TOKEN_INTEGER: | |
3035 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3036 | r = -EINVAL; | |
3037 | goto finish; | |
3038 | } | |
3039 | ||
3040 | r = json_variant_new_integer(&add, value.integer); | |
3041 | if (r < 0) | |
3042 | goto finish; | |
3043 | ||
3044 | if (current->expect == EXPECT_TOPLEVEL) | |
3045 | current->expect = EXPECT_END; | |
3046 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3047 | current->expect = EXPECT_OBJECT_COMMA; | |
3048 | else { | |
3049 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3050 | current->expect = EXPECT_ARRAY_COMMA; | |
3051 | } | |
3052 | ||
3053 | break; | |
3054 | ||
3055 | case JSON_TOKEN_UNSIGNED: | |
3056 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3057 | r = -EINVAL; | |
3058 | goto finish; | |
3059 | } | |
3060 | ||
3061 | r = json_variant_new_unsigned(&add, value.unsig); | |
3062 | if (r < 0) | |
3063 | goto finish; | |
3064 | ||
3065 | if (current->expect == EXPECT_TOPLEVEL) | |
3066 | current->expect = EXPECT_END; | |
3067 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3068 | current->expect = EXPECT_OBJECT_COMMA; | |
3069 | else { | |
3070 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3071 | current->expect = EXPECT_ARRAY_COMMA; | |
3072 | } | |
3073 | ||
3074 | break; | |
3075 | ||
3076 | case JSON_TOKEN_BOOLEAN: | |
3077 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3078 | r = -EINVAL; | |
3079 | goto finish; | |
3080 | } | |
3081 | ||
3082 | r = json_variant_new_boolean(&add, value.boolean); | |
3083 | if (r < 0) | |
3084 | goto finish; | |
3085 | ||
3086 | if (current->expect == EXPECT_TOPLEVEL) | |
3087 | current->expect = EXPECT_END; | |
3088 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3089 | current->expect = EXPECT_OBJECT_COMMA; | |
3090 | else { | |
3091 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3092 | current->expect = EXPECT_ARRAY_COMMA; | |
3093 | } | |
3094 | ||
3095 | break; | |
3096 | ||
3097 | case JSON_TOKEN_NULL: | |
3098 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
3099 | r = -EINVAL; | |
3100 | goto finish; | |
3101 | } | |
3102 | ||
3103 | r = json_variant_new_null(&add); | |
3104 | if (r < 0) | |
3105 | goto finish; | |
3106 | ||
3107 | if (current->expect == EXPECT_TOPLEVEL) | |
3108 | current->expect = EXPECT_END; | |
3109 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3110 | current->expect = EXPECT_OBJECT_COMMA; | |
3111 | else { | |
3112 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
3113 | current->expect = EXPECT_ARRAY_COMMA; | |
3114 | } | |
3115 | ||
3116 | break; | |
3117 | ||
3118 | default: | |
3119 | assert_not_reached("Unexpected token"); | |
3120 | } | |
3121 | ||
3122 | if (add) { | |
d642f640 LP |
3123 | /* If we are asked to make this parsed object sensitive, then let's apply this |
3124 | * immediately after allocating each variant, so that when we abort half-way | |
3125 | * everything we already allocated that is then freed is correctly marked. */ | |
3126 | if (FLAGS_SET(flags, JSON_PARSE_SENSITIVE)) | |
3127 | json_variant_sensitive(add); | |
3128 | ||
cd0b6c53 LP |
3129 | (void) json_variant_set_source(&add, source, line_token, column_token); |
3130 | ||
3131 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
3132 | r = -ENOMEM; | |
3133 | goto finish; | |
3134 | } | |
3135 | ||
6980b04f | 3136 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 LP |
3137 | } |
3138 | } | |
3139 | ||
3140 | done: | |
3141 | assert(n_stack == 1); | |
3142 | assert(stack[0].n_elements == 1); | |
3143 | ||
3144 | *ret = json_variant_ref(stack[0].elements[0]); | |
3145 | *input = p; | |
3146 | r = 0; | |
3147 | ||
3148 | finish: | |
3149 | for (i = 0; i < n_stack; i++) | |
3150 | json_stack_release(stack + i); | |
3151 | ||
3152 | free(stack); | |
3153 | ||
3154 | return r; | |
3155 | } | |
3156 | ||
d642f640 LP |
3157 | int json_parse(const char *input, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3158 | return json_parse_internal(&input, NULL, flags, ret, ret_line, ret_column, false); | |
cd0b6c53 LP |
3159 | } |
3160 | ||
d642f640 LP |
3161 | int json_parse_continue(const char **p, JsonParseFlags flags, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { |
3162 | return json_parse_internal(p, NULL, flags, ret, ret_line, ret_column, true); | |
cd0b6c53 LP |
3163 | } |
3164 | ||
d642f640 | 3165 | 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 |
3166 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; |
3167 | _cleanup_free_ char *text = NULL; | |
3168 | const char *p; | |
3169 | int r; | |
3170 | ||
3171 | if (f) | |
3172 | r = read_full_stream(f, &text, NULL); | |
3173 | else if (path) | |
f325aaf3 | 3174 | r = read_full_file_full(dir_fd, path, 0, &text, NULL); |
cd0b6c53 LP |
3175 | else |
3176 | return -EINVAL; | |
3177 | if (r < 0) | |
3178 | return r; | |
3179 | ||
3180 | if (path) { | |
3181 | source = json_source_new(path); | |
3182 | if (!source) | |
3183 | return -ENOMEM; | |
3184 | } | |
3185 | ||
3186 | p = text; | |
d642f640 | 3187 | return json_parse_internal(&p, source, flags, ret, ret_line, ret_column, false); |
cd0b6c53 LP |
3188 | } |
3189 | ||
3190 | int json_buildv(JsonVariant **ret, va_list ap) { | |
3191 | JsonStack *stack = NULL; | |
3192 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
3193 | int r; | |
3194 | ||
3195 | assert_return(ret, -EINVAL); | |
3196 | ||
3197 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
3198 | return -ENOMEM; | |
3199 | ||
3200 | stack[0] = (JsonStack) { | |
3201 | .expect = EXPECT_TOPLEVEL, | |
3202 | }; | |
3203 | ||
3204 | for (;;) { | |
fcadf032 | 3205 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
3206 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
3207 | * have been added to the current variant */ | |
cd0b6c53 LP |
3208 | JsonStack *current; |
3209 | int command; | |
3210 | ||
3211 | assert(n_stack > 0); | |
3212 | current = stack + n_stack - 1; | |
3213 | ||
3214 | if (current->expect == EXPECT_END) | |
3215 | goto done; | |
3216 | ||
3217 | command = va_arg(ap, int); | |
3218 | ||
3219 | switch (command) { | |
3220 | ||
3221 | case _JSON_BUILD_STRING: { | |
3222 | const char *p; | |
3223 | ||
3224 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3225 | r = -EINVAL; | |
3226 | goto finish; | |
3227 | } | |
3228 | ||
3229 | p = va_arg(ap, const char *); | |
3230 | ||
319a4f27 LP |
3231 | if (current->n_suppress == 0) { |
3232 | r = json_variant_new_string(&add, p); | |
3233 | if (r < 0) | |
3234 | goto finish; | |
3235 | } | |
3236 | ||
3237 | n_subtract = 1; | |
cd0b6c53 LP |
3238 | |
3239 | if (current->expect == EXPECT_TOPLEVEL) | |
3240 | current->expect = EXPECT_END; | |
3241 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3242 | current->expect = EXPECT_OBJECT_KEY; | |
3243 | else | |
3244 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3245 | ||
3246 | break; | |
3247 | } | |
3248 | ||
3249 | case _JSON_BUILD_INTEGER: { | |
3250 | intmax_t j; | |
3251 | ||
3252 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3253 | r = -EINVAL; | |
3254 | goto finish; | |
3255 | } | |
3256 | ||
3257 | j = va_arg(ap, intmax_t); | |
3258 | ||
319a4f27 LP |
3259 | if (current->n_suppress == 0) { |
3260 | r = json_variant_new_integer(&add, j); | |
3261 | if (r < 0) | |
3262 | goto finish; | |
3263 | } | |
3264 | ||
3265 | n_subtract = 1; | |
cd0b6c53 LP |
3266 | |
3267 | if (current->expect == EXPECT_TOPLEVEL) | |
3268 | current->expect = EXPECT_END; | |
3269 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3270 | current->expect = EXPECT_OBJECT_KEY; | |
3271 | else | |
3272 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3273 | ||
3274 | break; | |
3275 | } | |
3276 | ||
3277 | case _JSON_BUILD_UNSIGNED: { | |
3278 | uintmax_t j; | |
3279 | ||
3280 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3281 | r = -EINVAL; | |
3282 | goto finish; | |
3283 | } | |
3284 | ||
3285 | j = va_arg(ap, uintmax_t); | |
3286 | ||
319a4f27 LP |
3287 | if (current->n_suppress == 0) { |
3288 | r = json_variant_new_unsigned(&add, j); | |
3289 | if (r < 0) | |
3290 | goto finish; | |
3291 | } | |
3292 | ||
3293 | n_subtract = 1; | |
cd0b6c53 LP |
3294 | |
3295 | if (current->expect == EXPECT_TOPLEVEL) | |
3296 | current->expect = EXPECT_END; | |
3297 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3298 | current->expect = EXPECT_OBJECT_KEY; | |
3299 | else | |
3300 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3301 | ||
3302 | break; | |
3303 | } | |
3304 | ||
3305 | case _JSON_BUILD_REAL: { | |
3306 | long double d; | |
3307 | ||
3308 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3309 | r = -EINVAL; | |
3310 | goto finish; | |
3311 | } | |
3312 | ||
3313 | d = va_arg(ap, long double); | |
3314 | ||
319a4f27 LP |
3315 | if (current->n_suppress == 0) { |
3316 | r = json_variant_new_real(&add, d); | |
3317 | if (r < 0) | |
3318 | goto finish; | |
3319 | } | |
3320 | ||
3321 | n_subtract = 1; | |
cd0b6c53 LP |
3322 | |
3323 | if (current->expect == EXPECT_TOPLEVEL) | |
3324 | current->expect = EXPECT_END; | |
3325 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3326 | current->expect = EXPECT_OBJECT_KEY; | |
3327 | else | |
3328 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3329 | ||
3330 | break; | |
3331 | } | |
3332 | ||
3333 | case _JSON_BUILD_BOOLEAN: { | |
3334 | bool b; | |
3335 | ||
3336 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3337 | r = -EINVAL; | |
3338 | goto finish; | |
3339 | } | |
3340 | ||
3341 | b = va_arg(ap, int); | |
3342 | ||
319a4f27 LP |
3343 | if (current->n_suppress == 0) { |
3344 | r = json_variant_new_boolean(&add, b); | |
3345 | if (r < 0) | |
3346 | goto finish; | |
3347 | } | |
3348 | ||
3349 | n_subtract = 1; | |
cd0b6c53 LP |
3350 | |
3351 | if (current->expect == EXPECT_TOPLEVEL) | |
3352 | current->expect = EXPECT_END; | |
3353 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3354 | current->expect = EXPECT_OBJECT_KEY; | |
3355 | else | |
3356 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3357 | ||
3358 | break; | |
3359 | } | |
3360 | ||
3361 | case _JSON_BUILD_NULL: | |
3362 | ||
3363 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3364 | r = -EINVAL; | |
3365 | goto finish; | |
3366 | } | |
3367 | ||
319a4f27 LP |
3368 | if (current->n_suppress == 0) { |
3369 | r = json_variant_new_null(&add); | |
3370 | if (r < 0) | |
3371 | goto finish; | |
3372 | } | |
3373 | ||
3374 | n_subtract = 1; | |
cd0b6c53 LP |
3375 | |
3376 | if (current->expect == EXPECT_TOPLEVEL) | |
3377 | current->expect = EXPECT_END; | |
3378 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3379 | current->expect = EXPECT_OBJECT_KEY; | |
3380 | else | |
3381 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3382 | ||
3383 | break; | |
3384 | ||
3385 | case _JSON_BUILD_VARIANT: | |
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 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
3393 | * allocated anyway... */ | |
cd0b6c53 LP |
3394 | add = va_arg(ap, JsonVariant*); |
3395 | if (!add) | |
3396 | add = JSON_VARIANT_MAGIC_NULL; | |
3397 | else | |
3398 | json_variant_ref(add); | |
3399 | ||
319a4f27 LP |
3400 | n_subtract = 1; |
3401 | ||
cd0b6c53 LP |
3402 | if (current->expect == EXPECT_TOPLEVEL) |
3403 | current->expect = EXPECT_END; | |
3404 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3405 | current->expect = EXPECT_OBJECT_KEY; | |
3406 | else | |
3407 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3408 | ||
3409 | break; | |
3410 | ||
e4defdc4 LP |
3411 | case _JSON_BUILD_VARIANT_ARRAY: { |
3412 | JsonVariant **array; | |
3413 | size_t n; | |
3414 | ||
3415 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3416 | r = -EINVAL; | |
3417 | goto finish; | |
3418 | } | |
3419 | ||
3420 | array = va_arg(ap, JsonVariant**); | |
3421 | n = va_arg(ap, size_t); | |
3422 | ||
3423 | if (current->n_suppress == 0) { | |
3424 | r = json_variant_new_array(&add, array, n); | |
3425 | if (r < 0) | |
3426 | goto finish; | |
3427 | } | |
3428 | ||
3429 | n_subtract = 1; | |
3430 | ||
3431 | if (current->expect == EXPECT_TOPLEVEL) | |
3432 | current->expect = EXPECT_END; | |
3433 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3434 | current->expect = EXPECT_OBJECT_KEY; | |
3435 | else | |
3436 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3437 | ||
3438 | break; | |
3439 | } | |
3440 | ||
cd0b6c53 LP |
3441 | case _JSON_BUILD_LITERAL: { |
3442 | const char *l; | |
3443 | ||
3444 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3445 | r = -EINVAL; | |
3446 | goto finish; | |
3447 | } | |
3448 | ||
3449 | l = va_arg(ap, const char *); | |
3450 | ||
319a4f27 LP |
3451 | if (l) { |
3452 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
3453 | * errors even in suppressed object properties */ | |
3454 | ||
d642f640 | 3455 | r = json_parse(l, 0, &add, NULL, NULL); |
cd0b6c53 LP |
3456 | if (r < 0) |
3457 | goto finish; | |
319a4f27 LP |
3458 | } else |
3459 | add = JSON_VARIANT_MAGIC_NULL; | |
3460 | ||
3461 | n_subtract = 1; | |
cd0b6c53 LP |
3462 | |
3463 | if (current->expect == EXPECT_TOPLEVEL) | |
3464 | current->expect = EXPECT_END; | |
3465 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3466 | current->expect = EXPECT_OBJECT_KEY; | |
3467 | else | |
3468 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3469 | ||
3470 | break; | |
3471 | } | |
3472 | ||
3473 | case _JSON_BUILD_ARRAY_BEGIN: | |
3474 | ||
3475 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3476 | r = -EINVAL; | |
3477 | goto finish; | |
3478 | } | |
3479 | ||
3480 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
3481 | r = -ENOMEM; | |
3482 | goto finish; | |
3483 | } | |
3484 | current = stack + n_stack - 1; | |
3485 | ||
3486 | if (current->expect == EXPECT_TOPLEVEL) | |
3487 | current->expect = EXPECT_END; | |
3488 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3489 | current->expect = EXPECT_OBJECT_KEY; | |
3490 | else | |
3491 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3492 | ||
3493 | stack[n_stack++] = (JsonStack) { | |
3494 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
3495 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3496 | * new array, then we should | |
3497 | * also suppress all array | |
3498 | * members */ | |
cd0b6c53 LP |
3499 | }; |
3500 | ||
3501 | break; | |
3502 | ||
3503 | case _JSON_BUILD_ARRAY_END: | |
3504 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
3505 | r = -EINVAL; | |
3506 | goto finish; | |
3507 | } | |
3508 | ||
3509 | assert(n_stack > 1); | |
3510 | ||
319a4f27 LP |
3511 | if (current->n_suppress == 0) { |
3512 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
3513 | if (r < 0) | |
3514 | goto finish; | |
3515 | } | |
3516 | ||
3517 | n_subtract = 1; | |
cd0b6c53 LP |
3518 | |
3519 | json_stack_release(current); | |
3520 | n_stack--, current--; | |
3521 | ||
3522 | break; | |
3523 | ||
3524 | case _JSON_BUILD_STRV: { | |
3525 | char **l; | |
3526 | ||
3527 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3528 | r = -EINVAL; | |
3529 | goto finish; | |
3530 | } | |
3531 | ||
3532 | l = va_arg(ap, char **); | |
3533 | ||
319a4f27 LP |
3534 | if (current->n_suppress == 0) { |
3535 | r = json_variant_new_array_strv(&add, l); | |
3536 | if (r < 0) | |
3537 | goto finish; | |
3538 | } | |
3539 | ||
3540 | n_subtract = 1; | |
cd0b6c53 LP |
3541 | |
3542 | if (current->expect == EXPECT_TOPLEVEL) | |
3543 | current->expect = EXPECT_END; | |
3544 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3545 | current->expect = EXPECT_OBJECT_KEY; | |
3546 | else | |
3547 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3548 | ||
3549 | break; | |
3550 | } | |
886b0c93 LP |
3551 | |
3552 | case _JSON_BUILD_BASE64: { | |
3553 | const void *p; | |
3554 | size_t n; | |
3555 | ||
3556 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3557 | r = -EINVAL; | |
3558 | goto finish; | |
3559 | } | |
3560 | ||
3561 | p = va_arg(ap, const void *); | |
3562 | n = va_arg(ap, size_t); | |
3563 | ||
3564 | if (current->n_suppress == 0) { | |
3565 | r = json_variant_new_base64(&add, p, n); | |
3566 | if (r < 0) | |
3567 | goto finish; | |
3568 | } | |
3569 | ||
3570 | n_subtract = 1; | |
3571 | ||
3572 | if (current->expect == EXPECT_TOPLEVEL) | |
3573 | current->expect = EXPECT_END; | |
3574 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3575 | current->expect = EXPECT_OBJECT_KEY; | |
3576 | else | |
3577 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3578 | ||
3579 | break; | |
3580 | } | |
cd0b6c53 LP |
3581 | |
3582 | case _JSON_BUILD_OBJECT_BEGIN: | |
3583 | ||
3584 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
3585 | r = -EINVAL; | |
3586 | goto finish; | |
3587 | } | |
3588 | ||
3589 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
3590 | r = -ENOMEM; | |
3591 | goto finish; | |
3592 | } | |
3593 | current = stack + n_stack - 1; | |
3594 | ||
3595 | if (current->expect == EXPECT_TOPLEVEL) | |
3596 | current->expect = EXPECT_END; | |
3597 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3598 | current->expect = EXPECT_OBJECT_KEY; | |
3599 | else | |
3600 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3601 | ||
3602 | stack[n_stack++] = (JsonStack) { | |
3603 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
3604 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3605 | * new object, then we should | |
3606 | * also suppress all object | |
3607 | * members */ | |
cd0b6c53 LP |
3608 | }; |
3609 | ||
3610 | break; | |
3611 | ||
3612 | case _JSON_BUILD_OBJECT_END: | |
3613 | ||
3614 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3615 | r = -EINVAL; | |
3616 | goto finish; | |
3617 | } | |
3618 | ||
3619 | assert(n_stack > 1); | |
3620 | ||
319a4f27 LP |
3621 | if (current->n_suppress == 0) { |
3622 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3623 | if (r < 0) | |
3624 | goto finish; | |
3625 | } | |
3626 | ||
3627 | n_subtract = 1; | |
cd0b6c53 LP |
3628 | |
3629 | json_stack_release(current); | |
3630 | n_stack--, current--; | |
3631 | ||
3632 | break; | |
3633 | ||
3634 | case _JSON_BUILD_PAIR: { | |
3635 | const char *n; | |
3636 | ||
3637 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3638 | r = -EINVAL; | |
3639 | goto finish; | |
3640 | } | |
3641 | ||
3642 | n = va_arg(ap, const char *); | |
3643 | ||
319a4f27 LP |
3644 | if (current->n_suppress == 0) { |
3645 | r = json_variant_new_string(&add, n); | |
3646 | if (r < 0) | |
3647 | goto finish; | |
3648 | } | |
3649 | ||
3650 | n_subtract = 1; | |
3651 | ||
3652 | current->expect = EXPECT_OBJECT_VALUE; | |
3653 | break; | |
3654 | } | |
3655 | ||
3656 | case _JSON_BUILD_PAIR_CONDITION: { | |
3657 | const char *n; | |
3658 | bool b; | |
3659 | ||
3660 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3661 | r = -EINVAL; | |
cd0b6c53 | 3662 | goto finish; |
319a4f27 LP |
3663 | } |
3664 | ||
3665 | b = va_arg(ap, int); | |
3666 | n = va_arg(ap, const char *); | |
3667 | ||
3668 | if (b && current->n_suppress == 0) { | |
3669 | r = json_variant_new_string(&add, n); | |
3670 | if (r < 0) | |
3671 | goto finish; | |
3672 | } | |
3673 | ||
3674 | n_subtract = 1; /* we generated one item */ | |
3675 | ||
3676 | if (!b && current->n_suppress != (size_t) -1) | |
3677 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3678 | |
3679 | current->expect = EXPECT_OBJECT_VALUE; | |
3680 | break; | |
3681 | }} | |
3682 | ||
319a4f27 LP |
3683 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3684 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3685 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3686 | r = -ENOMEM; | |
3687 | goto finish; | |
3688 | } | |
3689 | ||
fcadf032 | 3690 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3691 | } |
319a4f27 LP |
3692 | |
3693 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3694 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3695 | * on this stack level */ | |
3696 | if (current->n_suppress != (size_t) -1) { | |
3697 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3698 | current->n_suppress = 0; | |
3699 | else | |
3700 | current->n_suppress -= n_subtract; | |
3701 | } | |
cd0b6c53 LP |
3702 | } |
3703 | ||
3704 | done: | |
3705 | assert(n_stack == 1); | |
3706 | assert(stack[0].n_elements == 1); | |
3707 | ||
3708 | *ret = json_variant_ref(stack[0].elements[0]); | |
3709 | r = 0; | |
3710 | ||
3711 | finish: | |
3712 | for (i = 0; i < n_stack; i++) | |
3713 | json_stack_release(stack + i); | |
3714 | ||
3715 | free(stack); | |
3716 | ||
cd0b6c53 LP |
3717 | return r; |
3718 | } | |
3719 | ||
3720 | int json_build(JsonVariant **ret, ...) { | |
3721 | va_list ap; | |
3722 | int r; | |
3723 | ||
3724 | va_start(ap, ret); | |
3725 | r = json_buildv(ret, ap); | |
3726 | va_end(ap); | |
3727 | ||
3728 | return r; | |
3729 | } | |
3730 | ||
3731 | int json_log_internal( | |
3732 | JsonVariant *variant, | |
3733 | int level, | |
3734 | int error, | |
3735 | const char *file, | |
3736 | int line, | |
3737 | const char *func, | |
3738 | const char *format, ...) { | |
3739 | ||
3740 | PROTECT_ERRNO; | |
3741 | ||
3742 | unsigned source_line, source_column; | |
3743 | char buffer[LINE_MAX]; | |
3744 | const char *source; | |
3745 | va_list ap; | |
3746 | int r; | |
3747 | ||
fc0f6fbf | 3748 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3749 | |
3750 | va_start(ap, format); | |
3751 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3752 | va_end(ap); | |
3753 | ||
3754 | if (variant) { | |
3755 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3756 | if (r < 0) | |
3757 | return r; | |
3758 | } else { | |
3759 | source = NULL; | |
3760 | source_line = 0; | |
3761 | source_column = 0; | |
3762 | } | |
3763 | ||
3764 | if (source && source_line > 0 && source_column > 0) | |
3765 | return log_struct_internal( | |
3766 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3767 | error, | |
3768 | file, line, func, | |
3769 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3770 | "CONFIG_FILE=%s", source, | |
3771 | "CONFIG_LINE=%u", source_line, | |
3772 | "CONFIG_COLUMN=%u", source_column, | |
13a16a2b | 3773 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
cd0b6c53 LP |
3774 | NULL); |
3775 | else | |
3776 | return log_struct_internal( | |
3777 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3778 | error, | |
3779 | file, line, func, | |
3780 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3781 | LOG_MESSAGE("%s", buffer), | |
3782 | NULL); | |
3783 | } | |
3784 | ||
3785 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3786 | const JsonDispatch *p; | |
3787 | size_t i, n, m; | |
3788 | int r, done = 0; | |
3789 | bool *found; | |
3790 | ||
3791 | if (!json_variant_is_object(v)) { | |
3792 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3793 | ||
3794 | if (flags & JSON_PERMISSIVE) | |
3795 | return 0; | |
3796 | ||
3797 | return -EINVAL; | |
3798 | } | |
3799 | ||
3800 | for (p = table, m = 0; p->name; p++) | |
3801 | m++; | |
3802 | ||
3803 | found = newa0(bool, m); | |
3804 | ||
3805 | n = json_variant_elements(v); | |
3806 | for (i = 0; i < n; i += 2) { | |
3807 | JsonVariant *key, *value; | |
3808 | ||
3809 | assert_se(key = json_variant_by_index(v, i)); | |
3810 | assert_se(value = json_variant_by_index(v, i+1)); | |
3811 | ||
3812 | for (p = table; p->name; p++) | |
3813 | if (p->name == (const char*) -1 || | |
3814 | streq_ptr(json_variant_string(key), p->name)) | |
3815 | break; | |
3816 | ||
3817 | if (p->name) { /* Found a matching entry! :-) */ | |
3818 | JsonDispatchFlags merged_flags; | |
3819 | ||
3820 | merged_flags = flags | p->flags; | |
3821 | ||
3822 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3823 | !json_variant_has_type(value, p->type)) { | |
3824 | ||
3825 | json_log(value, merged_flags, 0, | |
3826 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3827 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3828 | ||
3829 | if (merged_flags & JSON_PERMISSIVE) | |
3830 | continue; | |
3831 | ||
3832 | return -EINVAL; | |
3833 | } | |
3834 | ||
3835 | if (found[p-table]) { | |
3836 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3837 | ||
3838 | if (merged_flags & JSON_PERMISSIVE) | |
3839 | continue; | |
3840 | ||
3841 | return -ENOTUNIQ; | |
3842 | } | |
3843 | ||
3844 | found[p-table] = true; | |
3845 | ||
3846 | if (p->callback) { | |
3847 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3848 | if (r < 0) { | |
3849 | if (merged_flags & JSON_PERMISSIVE) | |
3850 | continue; | |
3851 | ||
3852 | return r; | |
3853 | } | |
3854 | } | |
3855 | ||
3856 | done ++; | |
3857 | ||
3858 | } else { /* Didn't find a matching entry! :-( */ | |
3859 | ||
3860 | if (bad) { | |
3861 | r = bad(json_variant_string(key), value, flags, userdata); | |
3862 | if (r < 0) { | |
3863 | if (flags & JSON_PERMISSIVE) | |
3864 | continue; | |
3865 | ||
3866 | return r; | |
3867 | } else | |
3868 | done ++; | |
3869 | ||
3870 | } else { | |
3871 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3872 | ||
3873 | if (flags & JSON_PERMISSIVE) | |
3874 | continue; | |
3875 | ||
3876 | return -EADDRNOTAVAIL; | |
3877 | } | |
3878 | } | |
3879 | } | |
3880 | ||
3881 | for (p = table; p->name; p++) { | |
3882 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3883 | ||
3884 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3885 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3886 | ||
3887 | if ((merged_flags & JSON_PERMISSIVE)) | |
3888 | continue; | |
3889 | ||
3890 | return -ENXIO; | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | return done; | |
3895 | } | |
3896 | ||
3897 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3898 | bool *b = userdata; | |
3899 | ||
3900 | assert(variant); | |
3901 | assert(b); | |
3902 | ||
02dab76e LP |
3903 | if (!json_variant_is_boolean(variant)) |
3904 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
3905 | |
3906 | *b = json_variant_boolean(variant); | |
3907 | return 0; | |
3908 | } | |
3909 | ||
3910 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3911 | int *b = userdata; | |
3912 | ||
3913 | assert(variant); | |
3914 | assert(b); | |
3915 | ||
3dd1b600 LP |
3916 | if (json_variant_is_null(variant)) { |
3917 | *b = -1; | |
3918 | return 0; | |
3919 | } | |
3920 | ||
02dab76e LP |
3921 | if (!json_variant_is_boolean(variant)) |
3922 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
3923 | |
3924 | *b = json_variant_boolean(variant); | |
3925 | return 0; | |
3926 | } | |
3927 | ||
3928 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3929 | intmax_t *i = userdata; | |
3930 | ||
3931 | assert(variant); | |
3932 | assert(i); | |
3933 | ||
02dab76e LP |
3934 | if (!json_variant_is_integer(variant)) |
3935 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 LP |
3936 | |
3937 | *i = json_variant_integer(variant); | |
3938 | return 0; | |
3939 | } | |
3940 | ||
3941 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3942 | uintmax_t *u = userdata; | |
3943 | ||
3944 | assert(variant); | |
3945 | assert(u); | |
3946 | ||
02dab76e LP |
3947 | if (!json_variant_is_unsigned(variant)) |
3948 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 LP |
3949 | |
3950 | *u = json_variant_unsigned(variant); | |
3951 | return 0; | |
3952 | } | |
3953 | ||
3954 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3955 | uint32_t *u = userdata; | |
3956 | ||
3957 | assert(variant); | |
3958 | assert(u); | |
3959 | ||
02dab76e LP |
3960 | if (!json_variant_is_unsigned(variant)) |
3961 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 | 3962 | |
02dab76e LP |
3963 | if (json_variant_unsigned(variant) > UINT32_MAX) |
3964 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
3965 | |
3966 | *u = (uint32_t) json_variant_unsigned(variant); | |
3967 | return 0; | |
3968 | } | |
3969 | ||
3970 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3971 | int32_t *i = userdata; | |
3972 | ||
3973 | assert(variant); | |
3974 | assert(i); | |
3975 | ||
02dab76e LP |
3976 | if (!json_variant_is_integer(variant)) |
3977 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 | 3978 | |
02dab76e LP |
3979 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) |
3980 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
3981 | |
3982 | *i = (int32_t) json_variant_integer(variant); | |
3983 | return 0; | |
3984 | } | |
3985 | ||
3986 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3987 | char **s = userdata; | |
3988 | int r; | |
3989 | ||
3990 | assert(variant); | |
3991 | assert(s); | |
3992 | ||
3993 | if (json_variant_is_null(variant)) { | |
3994 | *s = mfree(*s); | |
3995 | return 0; | |
3996 | } | |
3997 | ||
02dab76e LP |
3998 | if (!json_variant_is_string(variant)) |
3999 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
cd0b6c53 | 4000 | |
ba23dbf1 LP |
4001 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) |
4002 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4003 | ||
cd0b6c53 LP |
4004 | r = free_and_strdup(s, json_variant_string(variant)); |
4005 | if (r < 0) | |
4006 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4007 | ||
4008 | return 0; | |
4009 | } | |
4010 | ||
19a209cc LP |
4011 | int json_dispatch_const_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4012 | const char **s = userdata; | |
4013 | ||
4014 | assert(variant); | |
4015 | assert(s); | |
4016 | ||
4017 | if (json_variant_is_null(variant)) { | |
4018 | *s = NULL; | |
4019 | return 0; | |
4020 | } | |
4021 | ||
4022 | if (!json_variant_is_string(variant)) | |
4023 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4024 | ||
4025 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) | |
4026 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4027 | ||
4028 | *s = json_variant_string(variant); | |
4029 | return 0; | |
4030 | } | |
4031 | ||
cd0b6c53 LP |
4032 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4033 | _cleanup_strv_free_ char **l = NULL; | |
4034 | char ***s = userdata; | |
ca5e7694 | 4035 | JsonVariant *e; |
cd0b6c53 LP |
4036 | int r; |
4037 | ||
4038 | assert(variant); | |
4039 | assert(s); | |
4040 | ||
4041 | if (json_variant_is_null(variant)) { | |
4042 | *s = strv_free(*s); | |
4043 | return 0; | |
4044 | } | |
4045 | ||
07737617 LP |
4046 | /* Let's be flexible here: accept a single string in place of a single-item array */ |
4047 | if (json_variant_is_string(variant)) { | |
ba23dbf1 LP |
4048 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(variant))) |
4049 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4050 | ||
07737617 LP |
4051 | l = strv_new(json_variant_string(variant)); |
4052 | if (!l) | |
4053 | return log_oom(); | |
4054 | ||
4055 | strv_free_and_replace(*s, l); | |
4056 | return 0; | |
4057 | } | |
4058 | ||
02dab76e LP |
4059 | if (!json_variant_is_array(variant)) |
4060 | return json_log(variant, SYNTHETIC_ERRNO(EINVAL), flags, "JSON field '%s' is not an array.", strna(name)); | |
cd0b6c53 | 4061 | |
ca5e7694 | 4062 | JSON_VARIANT_ARRAY_FOREACH(e, variant) { |
02dab76e LP |
4063 | if (!json_variant_is_string(e)) |
4064 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); | |
cd0b6c53 | 4065 | |
ba23dbf1 LP |
4066 | if ((flags & JSON_SAFE) && !string_is_safe(json_variant_string(e))) |
4067 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' contains unsafe characters, refusing.", strna(name)); | |
4068 | ||
cd0b6c53 LP |
4069 | r = strv_extend(&l, json_variant_string(e)); |
4070 | if (r < 0) | |
b2bdf6e4 | 4071 | return json_log(e, flags, r, "Failed to append array element: %m"); |
cd0b6c53 LP |
4072 | } |
4073 | ||
4074 | strv_free_and_replace(*s, l); | |
4075 | return 0; | |
4076 | } | |
4077 | ||
4078 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4079 | JsonVariant **p = userdata; | |
4080 | ||
4081 | assert(variant); | |
4082 | assert(p); | |
4083 | ||
4084 | json_variant_unref(*p); | |
4085 | *p = json_variant_ref(variant); | |
4086 | ||
4087 | return 0; | |
4088 | } | |
4089 | ||
a42ef715 LP |
4090 | int json_dispatch_uid_gid(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { |
4091 | uid_t *uid = userdata; | |
4092 | uintmax_t k; | |
4093 | ||
4094 | assert_cc(sizeof(uid_t) == sizeof(uint32_t)); | |
4095 | assert_cc(sizeof(gid_t) == sizeof(uint32_t)); | |
4096 | ||
6028d766 | 4097 | DISABLE_WARNING_TYPE_LIMITS; |
a42ef715 | 4098 | assert_cc(((uid_t) -1 < (uid_t) 0) == ((gid_t) -1 < (gid_t) 0)); |
6028d766 | 4099 | REENABLE_WARNING; |
a42ef715 LP |
4100 | |
4101 | if (json_variant_is_null(variant)) { | |
4102 | *uid = UID_INVALID; | |
4103 | return 0; | |
4104 | } | |
4105 | ||
4106 | if (!json_variant_is_unsigned(variant)) | |
4107 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a integer.", strna(name)); | |
4108 | ||
4109 | k = json_variant_unsigned(variant); | |
4110 | if (k > UINT32_MAX || !uid_is_valid(k)) | |
4111 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid UID/GID.", strna(name)); | |
4112 | ||
4113 | *uid = k; | |
4114 | return 0; | |
4115 | } | |
4116 | ||
4117 | int json_dispatch_user_group_name(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4118 | char **s = userdata; | |
4119 | const char *n; | |
4120 | int r; | |
4121 | ||
4122 | if (json_variant_is_null(variant)) { | |
4123 | *s = mfree(*s); | |
4124 | return 0; | |
4125 | } | |
4126 | ||
4127 | if (!json_variant_is_string(variant)) | |
4128 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4129 | ||
4130 | n = json_variant_string(variant); | |
7a8867ab | 4131 | if (!valid_user_group_name(n, FLAGS_SET(flags, JSON_RELAX) ? VALID_USER_RELAX : 0)) |
a42ef715 LP |
4132 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a valid user/group name.", strna(name)); |
4133 | ||
4134 | r = free_and_strdup(s, n); | |
4135 | if (r < 0) | |
4136 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
4137 | ||
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | int json_dispatch_id128(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4142 | sd_id128_t *uuid = userdata; | |
4143 | int r; | |
4144 | ||
4145 | if (json_variant_is_null(variant)) { | |
4146 | *uuid = SD_ID128_NULL; | |
4147 | return 0; | |
4148 | } | |
4149 | ||
4150 | if (!json_variant_is_string(variant)) | |
4151 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
4152 | ||
4153 | r = sd_id128_from_string(json_variant_string(variant), uuid); | |
4154 | if (r < 0) | |
4155 | return json_log(variant, flags, r, "JSON field '%s' is not a valid UID.", strna(name)); | |
4156 | ||
4157 | return 0; | |
4158 | } | |
4159 | ||
4160 | int json_dispatch_unsupported(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
4161 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not allowed in this object.", strna(name)); | |
4162 | } | |
4163 | ||
b7fc90a2 LP |
4164 | static int json_cmp_strings(const void *x, const void *y) { |
4165 | JsonVariant *const *a = x, *const *b = y; | |
4166 | ||
4167 | if (!json_variant_is_string(*a) || !json_variant_is_string(*b)) | |
4168 | return CMP(*a, *b); | |
4169 | ||
4170 | return strcmp(json_variant_string(*a), json_variant_string(*b)); | |
4171 | } | |
4172 | ||
4173 | int json_variant_sort(JsonVariant **v) { | |
4174 | _cleanup_free_ JsonVariant **a = NULL; | |
4175 | JsonVariant *n = NULL; | |
4176 | size_t i, m; | |
4177 | int r; | |
4178 | ||
4179 | assert(v); | |
4180 | ||
4181 | if (json_variant_is_sorted(*v)) | |
4182 | return 0; | |
4183 | ||
4184 | if (!json_variant_is_object(*v)) | |
4185 | return -EMEDIUMTYPE; | |
4186 | ||
4187 | /* Sorts they key/value pairs in an object variant */ | |
4188 | ||
4189 | m = json_variant_elements(*v); | |
4190 | a = new(JsonVariant*, m); | |
4191 | if (!a) | |
4192 | return -ENOMEM; | |
4193 | ||
4194 | for (i = 0; i < m; i++) | |
4195 | a[i] = json_variant_by_index(*v, i); | |
4196 | ||
4197 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4198 | ||
4199 | r = json_variant_new_object(&n, a, m); | |
4200 | if (r < 0) | |
4201 | return r; | |
94600eeb LP |
4202 | |
4203 | json_variant_propagate_sensitive(*v, n); | |
4204 | ||
b7fc90a2 LP |
4205 | if (!n->sorted) /* Check if this worked. This will fail if there are multiple identical keys used. */ |
4206 | return -ENOTUNIQ; | |
4207 | ||
4208 | json_variant_unref(*v); | |
4209 | *v = n; | |
4210 | ||
4211 | return 1; | |
4212 | } | |
4213 | ||
4214 | int json_variant_normalize(JsonVariant **v) { | |
4215 | _cleanup_free_ JsonVariant **a = NULL; | |
4216 | JsonVariant *n = NULL; | |
4217 | size_t i, j, m; | |
4218 | int r; | |
4219 | ||
4220 | assert(v); | |
4221 | ||
4222 | if (json_variant_is_normalized(*v)) | |
4223 | return 0; | |
4224 | ||
4225 | if (!json_variant_is_object(*v) && !json_variant_is_array(*v)) | |
4226 | return -EMEDIUMTYPE; | |
4227 | ||
4228 | /* Sorts the key/value pairs in an object variant anywhere down the tree in the specified variant */ | |
4229 | ||
4230 | m = json_variant_elements(*v); | |
4231 | a = new(JsonVariant*, m); | |
4232 | if (!a) | |
4233 | return -ENOMEM; | |
4234 | ||
4235 | for (i = 0; i < m; i++) { | |
4236 | a[i] = json_variant_ref(json_variant_by_index(*v, i)); | |
4237 | ||
4238 | r = json_variant_normalize(a + i); | |
4239 | if (r < 0) | |
4240 | goto finish; | |
4241 | } | |
4242 | ||
4243 | qsort(a, m/2, sizeof(JsonVariant*)*2, json_cmp_strings); | |
4244 | ||
4245 | if (json_variant_is_object(*v)) | |
4246 | r = json_variant_new_object(&n, a, m); | |
4247 | else { | |
4248 | assert(json_variant_is_array(*v)); | |
4249 | r = json_variant_new_array(&n, a, m); | |
4250 | } | |
4251 | if (r < 0) | |
4252 | goto finish; | |
94600eeb LP |
4253 | |
4254 | json_variant_propagate_sensitive(*v, n); | |
4255 | ||
b7fc90a2 LP |
4256 | if (!n->normalized) { /* Let's see if normalization worked. It will fail if there are multiple |
4257 | * identical keys used in the same object anywhere, or if there are floating | |
4258 | * point numbers used (see below) */ | |
4259 | r = -ENOTUNIQ; | |
4260 | goto finish; | |
4261 | } | |
4262 | ||
4263 | json_variant_unref(*v); | |
4264 | *v = n; | |
4265 | ||
4266 | r = 1; | |
4267 | ||
4268 | finish: | |
4269 | for (j = 0; j < i; j++) | |
4270 | json_variant_unref(a[j]); | |
4271 | ||
4272 | return r; | |
4273 | } | |
4274 | ||
4275 | bool json_variant_is_normalized(JsonVariant *v) { | |
4276 | ||
4277 | /* For now, let's consider anything containing numbers not expressible as integers as | |
4278 | * non-normalized. That's because we cannot sensibly compare them due to accuracy issues, nor even | |
4279 | * store them if they are too large. */ | |
4280 | if (json_variant_is_real(v) && !json_variant_is_integer(v) && !json_variant_is_unsigned(v)) | |
4281 | return false; | |
4282 | ||
4283 | /* The concept only applies to variants that include other variants, i.e. objects and arrays. All | |
4284 | * others are normalized anyway. */ | |
4285 | if (!json_variant_is_object(v) && !json_variant_is_array(v)) | |
4286 | return true; | |
4287 | ||
4288 | /* Empty objects/arrays don't include any other variant, hence are always normalized too */ | |
4289 | if (json_variant_elements(v) == 0) | |
4290 | return true; | |
4291 | ||
4292 | return v->normalized; /* For everything else there's an explicit boolean we maintain */ | |
4293 | } | |
4294 | ||
4295 | bool json_variant_is_sorted(JsonVariant *v) { | |
4296 | ||
4297 | /* Returns true if all key/value pairs of an object are properly sorted. Note that this only applies | |
4298 | * to objects, not arrays. */ | |
4299 | ||
4300 | if (!json_variant_is_object(v)) | |
4301 | return true; | |
4302 | if (json_variant_elements(v) <= 1) | |
4303 | return true; | |
4304 | ||
4305 | return v->sorted; | |
4306 | } | |
4307 | ||
faca141c LP |
4308 | int json_variant_unbase64(JsonVariant *v, void **ret, size_t *ret_size) { |
4309 | ||
4310 | if (!json_variant_is_string(v)) | |
4311 | return -EINVAL; | |
4312 | ||
4313 | return unbase64mem(json_variant_string(v), (size_t) -1, ret, ret_size); | |
4314 | } | |
4315 | ||
cd0b6c53 LP |
4316 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { |
4317 | [JSON_VARIANT_STRING] = "string", | |
4318 | [JSON_VARIANT_INTEGER] = "integer", | |
4319 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
4320 | [JSON_VARIANT_REAL] = "real", | |
4321 | [JSON_VARIANT_NUMBER] = "number", | |
4322 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
4323 | [JSON_VARIANT_ARRAY] = "array", | |
4324 | [JSON_VARIANT_OBJECT] = "object", | |
4325 | [JSON_VARIANT_NULL] = "null", | |
4326 | }; | |
4327 | ||
4328 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |