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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" | |
26 | #include "utf8.h" | |
27 | ||
d4a389eb | 28 | /* Refuse putting together variants with a larger depth than 4K by default (as a protection against overflowing stacks |
b2fa0d4f | 29 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
d4a389eb YW |
30 | * remains under 2^16. |
31 | * The value was 16k, but it was discovered to be too high on llvm/x86-64. See also the issue #10738. */ | |
32 | #define DEPTH_MAX (4U*1024U) | |
b2fa0d4f LP |
33 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
34 | ||
cd0b6c53 LP |
35 | typedef struct JsonSource { |
36 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
37 | size_t n_ref; | |
38 | unsigned max_line; | |
39 | unsigned max_column; | |
40 | char name[]; | |
41 | } JsonSource; | |
42 | ||
43 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
44 | struct JsonVariant { | |
45 | union { | |
46 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
47 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
48 | * see below.) */ | |
49 | size_t n_ref; | |
50 | ||
51 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
52 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
53 | JsonVariant *parent; | |
54 | }; | |
55 | ||
a7efb030 LP |
56 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ |
57 | JsonSource *source; | |
58 | unsigned line, column; | |
59 | ||
cd0b6c53 LP |
60 | JsonVariantType type:5; |
61 | ||
62 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
63 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
64 | bool is_embedded:1; | |
65 | ||
66 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
67 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
68 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
69 | bool is_reference:1; | |
70 | ||
71 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
72 | bool is_marked:1; | |
73 | ||
b2fa0d4f LP |
74 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
75 | uint16_t depth; | |
cd0b6c53 LP |
76 | |
77 | union { | |
78 | /* For simple types we store the value in-line. */ | |
79 | JsonValue value; | |
80 | ||
81 | /* For objects and arrays we store the number of elements immediately following */ | |
82 | size_t n_elements; | |
83 | ||
84 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
85 | JsonVariant *reference; | |
86 | ||
87 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
88 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
89 | * element, while longer strings are stored as references. When this object is not embedded into an | |
90 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
91 | * much larger than INLINE_STRING_LENGTH. | |
92 | * | |
93 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
94 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
95 | * would the union and then the struct this is included in. And of structures with undefined size we | |
96 | * can't allocate arrays (at least not easily). */ | |
97 | char string[0]; | |
98 | }; | |
99 | }; | |
100 | ||
101 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
102 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
103 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
104 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
105 | ||
106 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
107 | * (x86-64). */ | |
108 | #ifdef __x86_64__ | |
109 | assert_cc(sizeof(JsonVariant) == 48U); | |
110 | assert_cc(INLINE_STRING_MAX == 15U); | |
111 | #endif | |
112 | ||
113 | static JsonSource* json_source_new(const char *name) { | |
114 | JsonSource *s; | |
115 | ||
116 | assert(name); | |
117 | ||
118 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
119 | if (!s) | |
120 | return NULL; | |
121 | ||
122 | *s = (JsonSource) { | |
123 | .n_ref = 1, | |
124 | }; | |
125 | strcpy(s->name, name); | |
126 | ||
127 | return s; | |
128 | } | |
129 | ||
130 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
131 | ||
132 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
133 | if (a == b) | |
134 | return true; | |
135 | ||
136 | if (!a || !b) | |
137 | return false; | |
138 | ||
139 | return streq(a->name, b->name); | |
140 | } | |
141 | ||
142 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
143 | ||
d520d519 LP |
144 | /* There are four kind of JsonVariant* pointers: |
145 | * | |
146 | * 1. NULL | |
147 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
148 | * 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. | |
149 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
150 | * | |
151 | * The four kinds of pointers can be discerned like this: | |
152 | * | |
153 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
154 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
155 | * 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, | |
156 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
157 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
158 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
159 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
160 | ||
cd0b6c53 | 161 | static bool json_variant_is_magic(const JsonVariant *v) { |
4fcb507a LP |
162 | if (!v) |
163 | return false; | |
164 | ||
165 | return v < _JSON_VARIANT_MAGIC_MAX; | |
cd0b6c53 LP |
166 | } |
167 | ||
d520d519 LP |
168 | static bool json_variant_is_const_string(const JsonVariant *v) { |
169 | ||
170 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
171 | return false; | |
172 | ||
173 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
174 | * hence use all uneven pointers as indicators for const strings. */ | |
175 | ||
176 | return (((uintptr_t) v) & 1) != 0; | |
177 | } | |
178 | ||
179 | static bool json_variant_is_regular(const JsonVariant *v) { | |
180 | ||
181 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
182 | return false; | |
183 | ||
184 | return (((uintptr_t) v) & 1) == 0; | |
cd0b6c53 LP |
185 | } |
186 | ||
187 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
188 | ||
189 | /* Recursively dereference variants that are references to other variants */ | |
190 | ||
191 | if (!v) | |
192 | return NULL; | |
193 | ||
d520d519 | 194 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
195 | return v; |
196 | ||
197 | if (!v->is_reference) | |
198 | return v; | |
199 | ||
200 | return json_variant_dereference(v->reference); | |
201 | } | |
202 | ||
b2fa0d4f LP |
203 | static uint16_t json_variant_depth(JsonVariant *v) { |
204 | ||
205 | v = json_variant_dereference(v); | |
206 | if (!v) | |
207 | return 0; | |
208 | ||
d520d519 | 209 | if (!json_variant_is_regular(v)) |
b2fa0d4f LP |
210 | return 0; |
211 | ||
212 | return v->depth; | |
213 | } | |
214 | ||
cd0b6c53 LP |
215 | static JsonVariant *json_variant_normalize(JsonVariant *v) { |
216 | ||
217 | /* Converts json variants to their normalized form, i.e. fully dereferenced and wherever possible converted to | |
218 | * the "magic" version if there is one */ | |
219 | ||
220 | if (!v) | |
221 | return NULL; | |
222 | ||
223 | v = json_variant_dereference(v); | |
224 | ||
225 | switch (json_variant_type(v)) { | |
226 | ||
227 | case JSON_VARIANT_BOOLEAN: | |
228 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
229 | ||
230 | case JSON_VARIANT_NULL: | |
231 | return JSON_VARIANT_MAGIC_NULL; | |
232 | ||
233 | case JSON_VARIANT_INTEGER: | |
234 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
235 | ||
236 | case JSON_VARIANT_UNSIGNED: | |
237 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
238 | ||
239 | case JSON_VARIANT_REAL: | |
240 | #pragma GCC diagnostic push | |
241 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
242 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; | |
243 | #pragma GCC diagnostic pop | |
244 | ||
245 | case JSON_VARIANT_STRING: | |
246 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
247 | ||
248 | case JSON_VARIANT_ARRAY: | |
249 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
250 | ||
251 | case JSON_VARIANT_OBJECT: | |
252 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
253 | ||
254 | default: | |
255 | return v; | |
256 | } | |
257 | } | |
258 | ||
259 | static JsonVariant *json_variant_conservative_normalize(JsonVariant *v) { | |
260 | ||
261 | /* Much like json_variant_normalize(), but won't simplify if the variant has a source/line location attached to | |
262 | * it, in order not to lose context */ | |
263 | ||
264 | if (!v) | |
265 | return NULL; | |
266 | ||
d520d519 | 267 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
268 | return v; |
269 | ||
270 | if (v->source || v->line > 0 || v->column > 0) | |
271 | return v; | |
272 | ||
273 | return json_variant_normalize(v); | |
274 | } | |
275 | ||
276 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
277 | JsonVariant *v; | |
278 | ||
279 | assert_return(ret, -EINVAL); | |
280 | ||
2eb1c198 LP |
281 | v = malloc0(MAX(sizeof(JsonVariant), |
282 | offsetof(JsonVariant, value) + space)); | |
cd0b6c53 LP |
283 | if (!v) |
284 | return -ENOMEM; | |
285 | ||
286 | v->n_ref = 1; | |
287 | v->type = type; | |
288 | ||
289 | *ret = v; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
294 | JsonVariant *v; | |
295 | int r; | |
296 | ||
297 | assert_return(ret, -EINVAL); | |
298 | ||
299 | if (i == 0) { | |
300 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
305 | if (r < 0) | |
306 | return r; | |
307 | ||
308 | v->value.integer = i; | |
309 | *ret = v; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
315 | JsonVariant *v; | |
316 | int r; | |
317 | ||
318 | assert_return(ret, -EINVAL); | |
319 | if (u == 0) { | |
320 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
325 | if (r < 0) | |
326 | return r; | |
327 | ||
328 | v->value.unsig = u; | |
329 | *ret = v; | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
335 | JsonVariant *v; | |
336 | int r; | |
337 | ||
338 | assert_return(ret, -EINVAL); | |
339 | ||
340 | #pragma GCC diagnostic push | |
341 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
342 | if (d == 0.0) { | |
343 | #pragma GCC diagnostic pop | |
344 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
349 | if (r < 0) | |
350 | return r; | |
351 | ||
352 | v->value.real = d; | |
353 | *ret = v; | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
359 | assert_return(ret, -EINVAL); | |
360 | ||
361 | if (b) | |
362 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
363 | else | |
364 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | int json_variant_new_null(JsonVariant **ret) { | |
370 | assert_return(ret, -EINVAL); | |
371 | ||
372 | *ret = JSON_VARIANT_MAGIC_NULL; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
377 | JsonVariant *v; | |
378 | int r; | |
379 | ||
380 | assert_return(ret, -EINVAL); | |
381 | if (!s) { | |
cbb3092c | 382 | assert_return(IN_SET(n, 0, (size_t) -1), -EINVAL); |
cd0b6c53 LP |
383 | return json_variant_new_null(ret); |
384 | } | |
cbb3092c LP |
385 | if (n == (size_t) -1) /* determine length automatically */ |
386 | n = strlen(s); | |
387 | else if (memchr(s, 0, n)) /* don't allow embedded NUL, as we can't express that in JSON */ | |
388 | return -EINVAL; | |
cd0b6c53 LP |
389 | if (n == 0) { |
390 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
391 | return 0; | |
392 | } | |
393 | ||
394 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); | |
395 | if (r < 0) | |
396 | return r; | |
397 | ||
398 | memcpy(v->string, s, n); | |
399 | v->string[n] = 0; | |
400 | ||
401 | *ret = v; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { | |
406 | assert(a); | |
407 | ||
408 | b = json_variant_dereference(b); | |
409 | if (!b) { | |
410 | a->type = JSON_VARIANT_NULL; | |
411 | return; | |
412 | } | |
413 | ||
414 | a->type = json_variant_type(b); | |
415 | switch (a->type) { | |
416 | ||
417 | case JSON_VARIANT_INTEGER: | |
418 | a->value.integer = json_variant_integer(b); | |
419 | break; | |
420 | ||
421 | case JSON_VARIANT_UNSIGNED: | |
422 | a->value.unsig = json_variant_unsigned(b); | |
423 | break; | |
424 | ||
425 | case JSON_VARIANT_REAL: | |
426 | a->value.real = json_variant_real(b); | |
427 | break; | |
428 | ||
429 | case JSON_VARIANT_BOOLEAN: | |
430 | a->value.boolean = json_variant_boolean(b); | |
431 | break; | |
432 | ||
433 | case JSON_VARIANT_STRING: { | |
434 | const char *s; | |
435 | ||
436 | assert_se(s = json_variant_string(b)); | |
437 | ||
438 | /* Short strings we can store inline */ | |
439 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
440 | strcpy(a->string, s); | |
441 | break; | |
442 | } | |
443 | ||
444 | /* For longer strings, use a reference… */ | |
445 | _fallthrough_; | |
446 | } | |
447 | ||
448 | case JSON_VARIANT_ARRAY: | |
449 | case JSON_VARIANT_OBJECT: | |
450 | a->is_reference = true; | |
451 | a->reference = json_variant_ref(json_variant_conservative_normalize(b)); | |
452 | break; | |
453 | ||
454 | case JSON_VARIANT_NULL: | |
455 | break; | |
456 | ||
457 | default: | |
458 | assert_not_reached("Unexpected variant type"); | |
459 | } | |
460 | } | |
461 | ||
462 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
463 | assert(v); | |
464 | assert(from); | |
465 | ||
d520d519 | 466 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
467 | return; |
468 | ||
469 | v->line = from->line; | |
470 | v->column = from->column; | |
471 | v->source = json_source_ref(from->source); | |
472 | } | |
473 | ||
474 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 475 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
476 | |
477 | assert_return(ret, -EINVAL); | |
478 | if (n == 0) { | |
479 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
480 | return 0; | |
481 | } | |
482 | assert_return(array, -EINVAL); | |
483 | ||
484 | v = new(JsonVariant, n + 1); | |
485 | if (!v) | |
486 | return -ENOMEM; | |
487 | ||
488 | *v = (JsonVariant) { | |
489 | .n_ref = 1, | |
490 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
491 | }; |
492 | ||
b2fa0d4f LP |
493 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
494 | JsonVariant *w = v + 1 + v->n_elements, | |
495 | *c = array[v->n_elements]; | |
496 | uint16_t d; | |
497 | ||
498 | d = json_variant_depth(c); | |
499 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
500 | return -ELNRNG; | |
501 | if (d >= v->depth) | |
502 | v->depth = d + 1; | |
cd0b6c53 LP |
503 | |
504 | *w = (JsonVariant) { | |
505 | .is_embedded = true, | |
506 | .parent = v, | |
507 | }; | |
508 | ||
b2fa0d4f LP |
509 | json_variant_set(w, c); |
510 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
511 | } |
512 | ||
b2fa0d4f | 513 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
514 | return 0; |
515 | } | |
516 | ||
517 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
518 | JsonVariant *v; | |
519 | size_t i; | |
520 | ||
521 | assert_return(ret, -EINVAL); | |
522 | if (n == 0) { | |
523 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
524 | return 0; | |
525 | } | |
526 | assert_return(p, -EINVAL); | |
527 | ||
528 | v = new(JsonVariant, n + 1); | |
529 | if (!v) | |
530 | return -ENOMEM; | |
531 | ||
532 | *v = (JsonVariant) { | |
533 | .n_ref = 1, | |
534 | .type = JSON_VARIANT_ARRAY, | |
535 | .n_elements = n, | |
b2fa0d4f | 536 | .depth = 1, |
cd0b6c53 LP |
537 | }; |
538 | ||
539 | for (i = 0; i < n; i++) { | |
540 | JsonVariant *w = v + 1 + i; | |
541 | ||
542 | *w = (JsonVariant) { | |
543 | .is_embedded = true, | |
544 | .parent = v, | |
a1559e3f LP |
545 | .type = JSON_VARIANT_UNSIGNED, |
546 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 547 | }; |
cd0b6c53 LP |
548 | } |
549 | ||
550 | *ret = v; | |
551 | return 0; | |
552 | } | |
553 | ||
554 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
555 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
556 | size_t n; | |
557 | int r; | |
558 | ||
559 | assert(ret); | |
560 | ||
561 | n = strv_length(l); | |
562 | if (n == 0) { | |
563 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
564 | return 0; | |
565 | } | |
566 | ||
a1559e3f | 567 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
568 | if (!v) |
569 | return -ENOMEM; | |
570 | ||
571 | *v = (JsonVariant) { | |
572 | .n_ref = 1, | |
573 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 574 | .depth = 1, |
cd0b6c53 LP |
575 | }; |
576 | ||
577 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
578 | JsonVariant *w = v + 1 + v->n_elements; | |
579 | size_t k; | |
580 | ||
a1559e3f LP |
581 | *w = (JsonVariant) { |
582 | .is_embedded = true, | |
583 | .parent = v, | |
584 | .type = JSON_VARIANT_STRING, | |
585 | }; | |
cd0b6c53 LP |
586 | |
587 | k = strlen(l[v->n_elements]); | |
588 | ||
589 | if (k > INLINE_STRING_MAX) { | |
590 | /* If string is too long, store it as reference. */ | |
591 | ||
cbb3092c | 592 | r = json_variant_new_string(&w->reference, l[v->n_elements]); |
cd0b6c53 LP |
593 | if (r < 0) |
594 | return r; | |
595 | ||
596 | w->is_reference = true; | |
597 | } else | |
598 | memcpy(w->string, l[v->n_elements], k+1); | |
599 | } | |
600 | ||
601 | *ret = TAKE_PTR(v); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 606 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
607 | |
608 | assert_return(ret, -EINVAL); | |
609 | if (n == 0) { | |
610 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
611 | return 0; | |
612 | } | |
613 | assert_return(array, -EINVAL); | |
614 | assert_return(n % 2 == 0, -EINVAL); | |
615 | ||
616 | v = new(JsonVariant, n + 1); | |
617 | if (!v) | |
618 | return -ENOMEM; | |
619 | ||
620 | *v = (JsonVariant) { | |
621 | .n_ref = 1, | |
622 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
623 | }; |
624 | ||
b2fa0d4f LP |
625 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
626 | JsonVariant *w = v + 1 + v->n_elements, | |
627 | *c = array[v->n_elements]; | |
628 | uint16_t d; | |
629 | ||
d77e781f LP |
630 | if ((v->n_elements & 1) == 0 && |
631 | !json_variant_is_string(c)) | |
632 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
633 | ||
b2fa0d4f LP |
634 | d = json_variant_depth(c); |
635 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
636 | return -ELNRNG; | |
637 | if (d >= v->depth) | |
638 | v->depth = d + 1; | |
cd0b6c53 LP |
639 | |
640 | *w = (JsonVariant) { | |
641 | .is_embedded = true, | |
642 | .parent = v, | |
643 | }; | |
644 | ||
b2fa0d4f LP |
645 | json_variant_set(w, c); |
646 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
647 | } |
648 | ||
b2fa0d4f | 649 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
650 | return 0; |
651 | } | |
652 | ||
653 | static void json_variant_free_inner(JsonVariant *v) { | |
654 | assert(v); | |
655 | ||
d520d519 | 656 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
657 | return; |
658 | ||
659 | json_source_unref(v->source); | |
660 | ||
661 | if (v->is_reference) { | |
662 | json_variant_unref(v->reference); | |
663 | return; | |
664 | } | |
665 | ||
666 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
667 | size_t i; | |
668 | ||
669 | for (i = 0; i < v->n_elements; i++) | |
670 | json_variant_free_inner(v + 1 + i); | |
671 | } | |
672 | } | |
673 | ||
674 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
675 | if (!v) | |
676 | return NULL; | |
d520d519 | 677 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
678 | return v; |
679 | ||
680 | if (v->is_embedded) | |
681 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
682 | else { | |
683 | assert(v->n_ref > 0); | |
684 | v->n_ref++; | |
685 | } | |
686 | ||
687 | return v; | |
688 | } | |
689 | ||
690 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
691 | if (!v) | |
692 | return NULL; | |
d520d519 | 693 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
694 | return NULL; |
695 | ||
696 | if (v->is_embedded) | |
697 | json_variant_unref(v->parent); | |
698 | else { | |
699 | assert(v->n_ref > 0); | |
700 | v->n_ref--; | |
701 | ||
702 | if (v->n_ref == 0) { | |
703 | json_variant_free_inner(v); | |
704 | free(v); | |
705 | } | |
706 | } | |
707 | ||
708 | return NULL; | |
709 | } | |
710 | ||
711 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
712 | size_t i; | |
713 | ||
714 | assert(array || n == 0); | |
715 | ||
716 | for (i = 0; i < n; i++) | |
717 | json_variant_unref(array[i]); | |
718 | } | |
719 | ||
720 | const char *json_variant_string(JsonVariant *v) { | |
721 | if (!v) | |
722 | return NULL; | |
723 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
724 | return ""; | |
725 | if (json_variant_is_magic(v)) | |
726 | goto mismatch; | |
d520d519 LP |
727 | if (json_variant_is_const_string(v)) { |
728 | uintptr_t p = (uintptr_t) v; | |
729 | ||
730 | assert((p & 1) != 0); | |
731 | return (const char*) (p ^ 1U); | |
732 | } | |
733 | ||
cd0b6c53 LP |
734 | if (v->is_reference) |
735 | return json_variant_string(v->reference); | |
736 | if (v->type != JSON_VARIANT_STRING) | |
737 | goto mismatch; | |
738 | ||
739 | return v->string; | |
740 | ||
741 | mismatch: | |
742 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
743 | return NULL; | |
744 | } | |
745 | ||
746 | bool json_variant_boolean(JsonVariant *v) { | |
747 | if (!v) | |
748 | goto mismatch; | |
749 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
750 | return true; | |
751 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
752 | return false; | |
d520d519 | 753 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
754 | goto mismatch; |
755 | if (v->type != JSON_VARIANT_BOOLEAN) | |
756 | goto mismatch; | |
757 | if (v->is_reference) | |
758 | return json_variant_boolean(v->reference); | |
759 | ||
760 | return v->value.boolean; | |
761 | ||
762 | mismatch: | |
763 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
764 | return false; | |
765 | } | |
766 | ||
767 | intmax_t json_variant_integer(JsonVariant *v) { | |
768 | if (!v) | |
769 | goto mismatch; | |
770 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
771 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
772 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
773 | return 0; | |
d520d519 | 774 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
775 | goto mismatch; |
776 | if (v->is_reference) | |
777 | return json_variant_integer(v->reference); | |
778 | ||
779 | switch (v->type) { | |
780 | ||
781 | case JSON_VARIANT_INTEGER: | |
782 | return v->value.integer; | |
783 | ||
784 | case JSON_VARIANT_UNSIGNED: | |
785 | if (v->value.unsig <= INTMAX_MAX) | |
786 | return (intmax_t) v->value.unsig; | |
787 | ||
788 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
789 | return 0; | |
790 | ||
791 | case JSON_VARIANT_REAL: { | |
792 | intmax_t converted; | |
793 | ||
794 | converted = (intmax_t) v->value.real; | |
795 | ||
796 | #pragma GCC diagnostic push | |
797 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
798 | if ((long double) converted == v->value.real) | |
799 | #pragma GCC diagnostic pop | |
800 | return converted; | |
801 | ||
802 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
803 | return 0; | |
804 | } | |
805 | ||
806 | default: | |
807 | break; | |
808 | } | |
809 | ||
810 | mismatch: | |
811 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
812 | return 0; | |
813 | } | |
814 | ||
815 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
816 | if (!v) | |
817 | goto mismatch; | |
818 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
819 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
820 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
821 | return 0; | |
d520d519 | 822 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
823 | goto mismatch; |
824 | if (v->is_reference) | |
825 | return json_variant_integer(v->reference); | |
826 | ||
827 | switch (v->type) { | |
828 | ||
829 | case JSON_VARIANT_INTEGER: | |
830 | if (v->value.integer >= 0) | |
831 | return (uintmax_t) v->value.integer; | |
832 | ||
833 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
834 | return 0; | |
835 | ||
836 | case JSON_VARIANT_UNSIGNED: | |
837 | return v->value.unsig; | |
838 | ||
839 | case JSON_VARIANT_REAL: { | |
840 | uintmax_t converted; | |
841 | ||
842 | converted = (uintmax_t) v->value.real; | |
843 | ||
844 | #pragma GCC diagnostic push | |
845 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
846 | if ((long double) converted == v->value.real) | |
847 | #pragma GCC diagnostic pop | |
848 | return converted; | |
849 | ||
850 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
851 | return 0; | |
852 | } | |
853 | ||
854 | default: | |
855 | break; | |
856 | } | |
857 | ||
858 | mismatch: | |
859 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
860 | return 0; | |
861 | } | |
862 | ||
863 | long double json_variant_real(JsonVariant *v) { | |
864 | if (!v) | |
865 | return 0.0; | |
866 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
867 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
868 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
869 | return 0.0; | |
d520d519 | 870 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
871 | goto mismatch; |
872 | if (v->is_reference) | |
873 | return json_variant_real(v->reference); | |
874 | ||
875 | switch (v->type) { | |
876 | ||
877 | case JSON_VARIANT_REAL: | |
878 | return v->value.real; | |
879 | ||
880 | case JSON_VARIANT_INTEGER: { | |
881 | long double converted; | |
882 | ||
883 | converted = (long double) v->value.integer; | |
884 | ||
885 | if ((intmax_t) converted == v->value.integer) | |
886 | return converted; | |
887 | ||
888 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
889 | return 0.0; | |
890 | } | |
891 | ||
892 | case JSON_VARIANT_UNSIGNED: { | |
893 | long double converted; | |
894 | ||
895 | converted = (long double) v->value.unsig; | |
896 | ||
897 | if ((uintmax_t) converted == v->value.unsig) | |
898 | return converted; | |
899 | ||
900 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
901 | return 0.0; | |
902 | } | |
903 | ||
904 | default: | |
905 | break; | |
906 | } | |
907 | ||
908 | mismatch: | |
909 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 910 | return 0.0; |
cd0b6c53 LP |
911 | } |
912 | ||
913 | bool json_variant_is_negative(JsonVariant *v) { | |
914 | if (!v) | |
915 | goto mismatch; | |
916 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
917 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
918 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
919 | return false; | |
d520d519 | 920 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
921 | goto mismatch; |
922 | if (v->is_reference) | |
923 | return json_variant_is_negative(v->reference); | |
924 | ||
925 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
926 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
927 | * values. */ | |
928 | ||
929 | switch (v->type) { | |
930 | ||
931 | case JSON_VARIANT_REAL: | |
932 | return v->value.real < 0; | |
933 | ||
934 | case JSON_VARIANT_INTEGER: | |
935 | return v->value.integer < 0; | |
936 | ||
937 | case JSON_VARIANT_UNSIGNED: | |
938 | return false; | |
939 | ||
940 | default: | |
941 | break; | |
942 | } | |
943 | ||
944 | mismatch: | |
945 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
946 | return false; | |
947 | } | |
948 | ||
949 | JsonVariantType json_variant_type(JsonVariant *v) { | |
950 | ||
951 | if (!v) | |
952 | return _JSON_VARIANT_TYPE_INVALID; | |
953 | ||
d520d519 LP |
954 | if (json_variant_is_const_string(v)) |
955 | return JSON_VARIANT_STRING; | |
956 | ||
cd0b6c53 LP |
957 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
958 | return JSON_VARIANT_BOOLEAN; | |
959 | ||
960 | if (v == JSON_VARIANT_MAGIC_NULL) | |
961 | return JSON_VARIANT_NULL; | |
962 | ||
963 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
964 | return JSON_VARIANT_INTEGER; | |
965 | ||
966 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
967 | return JSON_VARIANT_UNSIGNED; | |
968 | ||
969 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
970 | return JSON_VARIANT_REAL; | |
971 | ||
972 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
973 | return JSON_VARIANT_STRING; | |
974 | ||
975 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
976 | return JSON_VARIANT_ARRAY; | |
977 | ||
978 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
979 | return JSON_VARIANT_OBJECT; | |
980 | ||
981 | return v->type; | |
982 | } | |
983 | ||
984 | bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { | |
985 | JsonVariantType rt; | |
986 | ||
987 | v = json_variant_dereference(v); | |
f8c186c9 LP |
988 | if (!v) |
989 | return false; | |
cd0b6c53 LP |
990 | |
991 | rt = json_variant_type(v); | |
992 | if (rt == type) | |
993 | return true; | |
994 | ||
d520d519 LP |
995 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
996 | if (json_variant_is_const_string(v)) | |
997 | return false; | |
998 | ||
cd0b6c53 LP |
999 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
1000 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
1001 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
1002 | return true; | |
1003 | ||
1004 | /* All other magic variant types are only equal to themselves */ | |
1005 | if (json_variant_is_magic(v)) | |
1006 | return false; | |
1007 | ||
1008 | /* Handle the "number" pseudo type */ | |
1009 | if (type == JSON_VARIANT_NUMBER) | |
1010 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1011 | ||
1012 | /* Integer conversions are OK in many cases */ | |
1013 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1014 | return v->value.integer >= 0; | |
1015 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1016 | return v->value.unsig <= INTMAX_MAX; | |
1017 | ||
1018 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1019 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1020 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1021 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1022 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1023 | ||
1024 | #pragma GCC diagnostic push | |
1025 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1026 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ | |
1027 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1028 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1029 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1030 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
1031 | #pragma GCC diagnostic pop | |
1032 | ||
1033 | return false; | |
1034 | } | |
1035 | ||
1036 | size_t json_variant_elements(JsonVariant *v) { | |
1037 | if (!v) | |
1038 | return 0; | |
1039 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1040 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1041 | return 0; | |
d520d519 | 1042 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1043 | goto mismatch; |
1044 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1045 | goto mismatch; | |
1046 | if (v->is_reference) | |
1047 | return json_variant_elements(v->reference); | |
1048 | ||
1049 | return v->n_elements; | |
1050 | ||
1051 | mismatch: | |
1052 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1057 | if (!v) | |
1058 | return NULL; | |
1059 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1060 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1061 | return NULL; | |
d520d519 | 1062 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1063 | goto mismatch; |
1064 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1065 | goto mismatch; | |
1066 | if (v->is_reference) | |
1067 | return json_variant_by_index(v->reference, idx); | |
1068 | if (idx >= v->n_elements) | |
1069 | return NULL; | |
1070 | ||
1071 | return json_variant_conservative_normalize(v + 1 + idx); | |
1072 | ||
1073 | mismatch: | |
1074 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1075 | return NULL; | |
1076 | } | |
1077 | ||
1078 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1079 | size_t i; | |
1080 | ||
1081 | if (!v) | |
1082 | goto not_found; | |
1083 | if (!key) | |
1084 | goto not_found; | |
1085 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1086 | goto not_found; | |
d520d519 | 1087 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1088 | goto mismatch; |
1089 | if (v->type != JSON_VARIANT_OBJECT) | |
1090 | goto mismatch; | |
1091 | if (v->is_reference) | |
1092 | return json_variant_by_key(v->reference, key); | |
1093 | ||
1094 | for (i = 0; i < v->n_elements; i += 2) { | |
1095 | JsonVariant *p; | |
1096 | ||
1097 | p = json_variant_dereference(v + 1 + i); | |
1098 | ||
1099 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1100 | continue; | |
1101 | ||
1102 | if (streq(json_variant_string(p), key)) { | |
1103 | ||
1104 | if (ret_key) | |
1105 | *ret_key = json_variant_conservative_normalize(v + 1 + i); | |
1106 | ||
1107 | return json_variant_conservative_normalize(v + 1 + i + 1); | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | not_found: | |
1112 | if (ret_key) | |
1113 | *ret_key = NULL; | |
1114 | ||
1115 | return NULL; | |
1116 | ||
1117 | mismatch: | |
1118 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1119 | if (ret_key) | |
1120 | *ret_key = NULL; | |
1121 | ||
1122 | return NULL; | |
1123 | } | |
1124 | ||
1125 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1126 | return json_variant_by_key_full(v, key, NULL); | |
1127 | } | |
1128 | ||
1129 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1130 | JsonVariantType t; | |
1131 | ||
1132 | a = json_variant_normalize(a); | |
1133 | b = json_variant_normalize(b); | |
1134 | ||
1135 | if (a == b) | |
1136 | return true; | |
1137 | ||
1138 | t = json_variant_type(a); | |
1139 | if (!json_variant_has_type(b, t)) | |
1140 | return false; | |
1141 | ||
1142 | switch (t) { | |
1143 | ||
1144 | case JSON_VARIANT_STRING: | |
1145 | return streq(json_variant_string(a), json_variant_string(b)); | |
1146 | ||
1147 | case JSON_VARIANT_INTEGER: | |
1148 | return json_variant_integer(a) == json_variant_integer(b); | |
1149 | ||
1150 | case JSON_VARIANT_UNSIGNED: | |
1151 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1152 | ||
1153 | case JSON_VARIANT_REAL: | |
1154 | #pragma GCC diagnostic push | |
1155 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1156 | return json_variant_real(a) == json_variant_real(b); | |
1157 | #pragma GCC diagnostic pop | |
1158 | ||
1159 | case JSON_VARIANT_BOOLEAN: | |
1160 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1161 | ||
1162 | case JSON_VARIANT_NULL: | |
1163 | return true; | |
1164 | ||
1165 | case JSON_VARIANT_ARRAY: { | |
1166 | size_t i, n; | |
1167 | ||
1168 | n = json_variant_elements(a); | |
1169 | if (n != json_variant_elements(b)) | |
1170 | return false; | |
1171 | ||
1172 | for (i = 0; i < n; i++) { | |
1173 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1174 | return false; | |
1175 | } | |
1176 | ||
1177 | return true; | |
1178 | } | |
1179 | ||
1180 | case JSON_VARIANT_OBJECT: { | |
1181 | size_t i, n; | |
1182 | ||
1183 | n = json_variant_elements(a); | |
1184 | if (n != json_variant_elements(b)) | |
1185 | return false; | |
1186 | ||
1187 | /* Iterate through all keys in 'a' */ | |
1188 | for (i = 0; i < n; i += 2) { | |
1189 | bool found = false; | |
1190 | size_t j; | |
1191 | ||
1192 | /* Match them against all keys in 'b' */ | |
1193 | for (j = 0; j < n; j += 2) { | |
1194 | JsonVariant *key_b; | |
1195 | ||
1196 | key_b = json_variant_by_index(b, j); | |
1197 | ||
1198 | /* During the first iteration unmark everything */ | |
1199 | if (i == 0) | |
1200 | key_b->is_marked = false; | |
1201 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1202 | continue; | |
1203 | ||
1204 | if (found) | |
1205 | continue; | |
1206 | ||
1207 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1208 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1209 | /* Key and values match! */ | |
1210 | key_b->is_marked = found = true; | |
1211 | ||
1212 | /* In the first iteration we continue the inner loop since we want to mark | |
1213 | * everything, otherwise exit the loop quickly after we found what we were | |
1214 | * looking for. */ | |
1215 | if (i != 0) | |
1216 | break; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | if (!found) | |
1221 | return false; | |
1222 | } | |
1223 | ||
1224 | return true; | |
1225 | } | |
1226 | ||
1227 | default: | |
1228 | assert_not_reached("Unknown variant type."); | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { | |
1233 | assert_return(v, -EINVAL); | |
1234 | ||
1235 | if (ret_source) | |
d520d519 | 1236 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1237 | |
1238 | if (ret_line) | |
d520d519 | 1239 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1240 | |
1241 | if (ret_column) | |
d520d519 | 1242 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1243 | |
1244 | return 0; | |
1245 | } | |
1246 | ||
897f099b | 1247 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1248 | size_t w, k; |
1249 | ||
1250 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1251 | return 0; | |
1252 | ||
d520d519 | 1253 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1254 | return 0; |
1255 | ||
1256 | if (!v->source && v->line == 0 && v->column == 0) | |
1257 | return 0; | |
1258 | ||
1259 | /* The max width we need to format the line numbers for this source file */ | |
1260 | w = (v->source && v->source->max_line > 0) ? | |
1261 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1262 | DECIMAL_STR_MAX(unsigned)-1; | |
1263 | k = (v->source && v->source->max_column > 0) ? | |
1264 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1265 | DECIMAL_STR_MAX(unsigned) -1; | |
1266 | ||
1267 | if (whitespace) { | |
1268 | size_t i, n; | |
1269 | ||
1270 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1271 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1272 | (v->line > 0 ? w : 0) + | |
1273 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1274 | (v->column > 0 ? k : 0) + | |
1275 | 2; | |
1276 | ||
1277 | for (i = 0; i < n; i++) | |
1278 | fputc(' ', f); | |
1279 | } else { | |
1280 | fputc('[', f); | |
1281 | ||
1282 | if (v->source) | |
1283 | fputs(v->source->name, f); | |
1284 | if (v->source && (v->line > 0 || v->column > 0)) | |
1285 | fputc(':', f); | |
1286 | if (v->line > 0) | |
1287 | fprintf(f, "%*u", (int) w, v->line); | |
1288 | if ((v->source || v->line > 0) || v->column > 0) | |
1289 | fputc(':', f); | |
1290 | if (v->column > 0) | |
1291 | fprintf(f, "%*u", (int) k, v->column); | |
1292 | ||
1293 | fputc(']', f); | |
1294 | fputc(' ', f); | |
1295 | } | |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
897f099b | 1300 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1301 | int r; |
1302 | ||
1303 | assert(f); | |
1304 | assert(v); | |
1305 | ||
1306 | switch (json_variant_type(v)) { | |
1307 | ||
1308 | case JSON_VARIANT_REAL: { | |
1309 | locale_t loc; | |
1310 | ||
1311 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1312 | if (loc == (locale_t) 0) | |
1313 | return -errno; | |
1314 | ||
1315 | if (flags & JSON_FORMAT_COLOR) | |
1316 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1317 | ||
1318 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1319 | ||
1320 | if (flags & JSON_FORMAT_COLOR) | |
1321 | fputs(ANSI_NORMAL, f); | |
1322 | ||
1323 | freelocale(loc); | |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | case JSON_VARIANT_INTEGER: | |
1328 | if (flags & JSON_FORMAT_COLOR) | |
1329 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1330 | ||
1331 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1332 | ||
1333 | if (flags & JSON_FORMAT_COLOR) | |
1334 | fputs(ANSI_NORMAL, f); | |
1335 | break; | |
1336 | ||
1337 | case JSON_VARIANT_UNSIGNED: | |
1338 | if (flags & JSON_FORMAT_COLOR) | |
1339 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1340 | ||
1341 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1342 | ||
1343 | if (flags & JSON_FORMAT_COLOR) | |
1344 | fputs(ANSI_NORMAL, f); | |
1345 | break; | |
1346 | ||
1347 | case JSON_VARIANT_BOOLEAN: | |
1348 | ||
1349 | if (flags & JSON_FORMAT_COLOR) | |
1350 | fputs(ANSI_HIGHLIGHT, f); | |
1351 | ||
1352 | if (json_variant_boolean(v)) | |
1353 | fputs("true", f); | |
1354 | else | |
1355 | fputs("false", f); | |
1356 | ||
1357 | if (flags & JSON_FORMAT_COLOR) | |
1358 | fputs(ANSI_NORMAL, f); | |
1359 | ||
1360 | break; | |
1361 | ||
1362 | case JSON_VARIANT_NULL: | |
1363 | if (flags & JSON_FORMAT_COLOR) | |
1364 | fputs(ANSI_HIGHLIGHT, f); | |
1365 | ||
1366 | fputs("null", f); | |
1367 | ||
1368 | if (flags & JSON_FORMAT_COLOR) | |
1369 | fputs(ANSI_NORMAL, f); | |
1370 | break; | |
1371 | ||
1372 | case JSON_VARIANT_STRING: { | |
1373 | const char *q; | |
1374 | ||
1375 | fputc('"', f); | |
1376 | ||
1377 | if (flags & JSON_FORMAT_COLOR) | |
1378 | fputs(ANSI_GREEN, f); | |
1379 | ||
1380 | for (q = json_variant_string(v); *q; q++) { | |
1381 | ||
1382 | switch (*q) { | |
1383 | ||
1384 | case '"': | |
1385 | fputs("\\\"", f); | |
1386 | break; | |
1387 | ||
1388 | case '\\': | |
1389 | fputs("\\\\", f); | |
1390 | break; | |
1391 | ||
cd0b6c53 LP |
1392 | case '\b': |
1393 | fputs("\\b", f); | |
1394 | break; | |
1395 | ||
1396 | case '\f': | |
1397 | fputs("\\f", f); | |
1398 | break; | |
1399 | ||
1400 | case '\n': | |
1401 | fputs("\\n", f); | |
1402 | break; | |
1403 | ||
1404 | case '\r': | |
1405 | fputs("\\r", f); | |
1406 | break; | |
1407 | ||
1408 | case '\t': | |
1409 | fputs("\\t", f); | |
1410 | break; | |
1411 | ||
1412 | default: | |
df7f9e0b | 1413 | if ((signed char) *q >= 0 && *q < ' ') |
cd0b6c53 LP |
1414 | fprintf(f, "\\u%04x", *q); |
1415 | else | |
1416 | fputc(*q, f); | |
1417 | break; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | if (flags & JSON_FORMAT_COLOR) | |
1422 | fputs(ANSI_NORMAL, f); | |
1423 | ||
1424 | fputc('"', f); | |
1425 | break; | |
1426 | } | |
1427 | ||
1428 | case JSON_VARIANT_ARRAY: { | |
1429 | size_t i, n; | |
1430 | ||
1431 | n = json_variant_elements(v); | |
1432 | ||
1433 | if (n == 0) | |
1434 | fputs("[]", f); | |
1435 | else { | |
4ae7e4e5 | 1436 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1437 | const char *prefix2; |
1438 | ||
1439 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1440 | joined = strjoin(strempty(prefix), "\t"); |
1441 | if (!joined) | |
1442 | return -ENOMEM; | |
1443 | ||
1444 | prefix2 = joined; | |
cd0b6c53 LP |
1445 | fputs("[\n", f); |
1446 | } else { | |
1447 | prefix2 = strempty(prefix); | |
1448 | fputc('[', f); | |
1449 | } | |
1450 | ||
1451 | for (i = 0; i < n; i++) { | |
1452 | JsonVariant *e; | |
1453 | ||
1454 | assert_se(e = json_variant_by_index(v, i)); | |
1455 | ||
1456 | if (i > 0) { | |
1457 | if (flags & JSON_FORMAT_PRETTY) | |
1458 | fputs(",\n", f); | |
1459 | else | |
1460 | fputc(',', f); | |
1461 | } | |
1462 | ||
1463 | if (flags & JSON_FORMAT_PRETTY) { | |
1464 | print_source(f, e, flags, false); | |
1465 | fputs(prefix2, f); | |
1466 | } | |
1467 | ||
1468 | r = json_format(f, e, flags, prefix2); | |
1469 | if (r < 0) | |
1470 | return r; | |
1471 | } | |
1472 | ||
1473 | if (flags & JSON_FORMAT_PRETTY) { | |
1474 | fputc('\n', f); | |
1475 | print_source(f, v, flags, true); | |
1476 | fputs(strempty(prefix), f); | |
1477 | } | |
1478 | ||
1479 | fputc(']', f); | |
1480 | } | |
1481 | break; | |
1482 | } | |
1483 | ||
1484 | case JSON_VARIANT_OBJECT: { | |
1485 | size_t i, n; | |
1486 | ||
1487 | n = json_variant_elements(v); | |
1488 | ||
1489 | if (n == 0) | |
1490 | fputs("{}", f); | |
1491 | else { | |
4ae7e4e5 | 1492 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1493 | const char *prefix2; |
1494 | ||
1495 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1496 | joined = strjoin(strempty(prefix), "\t"); |
1497 | if (!joined) | |
1498 | return -ENOMEM; | |
1499 | ||
1500 | prefix2 = joined; | |
cd0b6c53 LP |
1501 | fputs("{\n", f); |
1502 | } else { | |
1503 | prefix2 = strempty(prefix); | |
1504 | fputc('{', f); | |
1505 | } | |
1506 | ||
1507 | for (i = 0; i < n; i += 2) { | |
1508 | JsonVariant *e; | |
1509 | ||
1510 | e = json_variant_by_index(v, i); | |
1511 | ||
1512 | if (i > 0) { | |
1513 | if (flags & JSON_FORMAT_PRETTY) | |
1514 | fputs(",\n", f); | |
1515 | else | |
1516 | fputc(',', f); | |
1517 | } | |
1518 | ||
1519 | if (flags & JSON_FORMAT_PRETTY) { | |
1520 | print_source(f, e, flags, false); | |
1521 | fputs(prefix2, f); | |
1522 | } | |
1523 | ||
1524 | r = json_format(f, e, flags, prefix2); | |
1525 | if (r < 0) | |
1526 | return r; | |
1527 | ||
1528 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1529 | ||
1530 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1531 | if (r < 0) | |
1532 | return r; | |
1533 | } | |
1534 | ||
1535 | if (flags & JSON_FORMAT_PRETTY) { | |
1536 | fputc('\n', f); | |
1537 | print_source(f, v, flags, true); | |
1538 | fputs(strempty(prefix), f); | |
1539 | } | |
1540 | ||
1541 | fputc('}', f); | |
1542 | } | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | default: | |
1547 | assert_not_reached("Unexpected variant type."); | |
1548 | } | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
897f099b | 1553 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1554 | _cleanup_free_ char *s = NULL; |
1555 | size_t sz = 0; | |
1556 | int r; | |
1557 | ||
2a04712c ZJS |
1558 | /* Returns the length of the generated string (without the terminating NUL), |
1559 | * or negative on error. */ | |
1560 | ||
cd0b6c53 LP |
1561 | assert_return(v, -EINVAL); |
1562 | assert_return(ret, -EINVAL); | |
1563 | ||
1564 | { | |
1565 | _cleanup_fclose_ FILE *f = NULL; | |
1566 | ||
2fe21124 | 1567 | f = open_memstream_unlocked(&s, &sz); |
cd0b6c53 LP |
1568 | if (!f) |
1569 | return -ENOMEM; | |
1570 | ||
cd0b6c53 LP |
1571 | json_variant_dump(v, flags, f, NULL); |
1572 | ||
2a04712c ZJS |
1573 | /* Add terminating 0, so that the output buffer is a valid string. */ |
1574 | fputc('\0', f); | |
1575 | ||
cd0b6c53 LP |
1576 | r = fflush_and_check(f); |
1577 | } | |
1578 | if (r < 0) | |
1579 | return r; | |
1580 | ||
1581 | assert(s); | |
1582 | *ret = TAKE_PTR(s); | |
2a04712c ZJS |
1583 | assert(sz > 0); |
1584 | return (int) sz - 1; | |
cd0b6c53 LP |
1585 | } |
1586 | ||
897f099b | 1587 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1588 | if (!v) |
1589 | return; | |
1590 | ||
1591 | if (!f) | |
1592 | f = stdout; | |
1593 | ||
1594 | print_source(f, v, flags, false); | |
1595 | ||
ab91733c LP |
1596 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1597 | flags |= JSON_FORMAT_COLOR; | |
1598 | ||
cd0b6c53 LP |
1599 | if (flags & JSON_FORMAT_SSE) |
1600 | fputs("data: ", f); | |
1601 | if (flags & JSON_FORMAT_SEQ) | |
1602 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1603 | ||
1604 | json_format(f, v, flags, prefix); | |
1605 | ||
1606 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1607 | fputc('\n', f); | |
1608 | if (flags & JSON_FORMAT_SSE) | |
1609 | fputc('\n', f); /* In case of SSE add a second newline */ | |
1610 | } | |
1611 | ||
1612 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { | |
1613 | JsonVariantType t; | |
1614 | JsonVariant *c; | |
1615 | JsonValue value; | |
1616 | const void *source; | |
1617 | size_t k; | |
1618 | ||
1619 | assert(nv); | |
1620 | assert(v); | |
1621 | ||
1622 | /* Let's copy the simple types literally, and the larger types by references */ | |
1623 | t = json_variant_type(v); | |
1624 | switch (t) { | |
1625 | case JSON_VARIANT_INTEGER: | |
1626 | k = sizeof(intmax_t); | |
1627 | value.integer = json_variant_integer(v); | |
1628 | source = &value; | |
1629 | break; | |
1630 | ||
1631 | case JSON_VARIANT_UNSIGNED: | |
1632 | k = sizeof(uintmax_t); | |
1633 | value.unsig = json_variant_unsigned(v); | |
1634 | source = &value; | |
1635 | break; | |
1636 | ||
1637 | case JSON_VARIANT_REAL: | |
1638 | k = sizeof(long double); | |
1639 | value.real = json_variant_real(v); | |
1640 | source = &value; | |
1641 | break; | |
1642 | ||
1643 | case JSON_VARIANT_BOOLEAN: | |
1644 | k = sizeof(bool); | |
1645 | value.boolean = json_variant_boolean(v); | |
1646 | source = &value; | |
1647 | break; | |
1648 | ||
1649 | case JSON_VARIANT_NULL: | |
1650 | k = 0; | |
1651 | source = NULL; | |
1652 | break; | |
1653 | ||
1654 | case JSON_VARIANT_STRING: | |
1655 | source = json_variant_string(v); | |
1656 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
1657 | if (k <= INLINE_STRING_MAX) { | |
1658 | k ++; | |
1659 | break; | |
1660 | } | |
1661 | ||
1662 | _fallthrough_; | |
1663 | ||
1664 | default: | |
1665 | /* Everything else copy by reference */ | |
1666 | ||
2eb1c198 LP |
1667 | c = malloc0(MAX(sizeof(JsonVariant), |
1668 | offsetof(JsonVariant, reference) + sizeof(JsonVariant*))); | |
cd0b6c53 LP |
1669 | if (!c) |
1670 | return -ENOMEM; | |
1671 | ||
1672 | c->n_ref = 1; | |
1673 | c->type = t; | |
1674 | c->is_reference = true; | |
1675 | c->reference = json_variant_ref(json_variant_normalize(v)); | |
1676 | ||
1677 | *nv = c; | |
1678 | return 0; | |
1679 | } | |
1680 | ||
2eb1c198 LP |
1681 | c = malloc0(MAX(sizeof(JsonVariant), |
1682 | offsetof(JsonVariant, value) + k)); | |
cd0b6c53 LP |
1683 | if (!c) |
1684 | return -ENOMEM; | |
1685 | ||
1686 | c->n_ref = 1; | |
1687 | c->type = t; | |
1688 | ||
1689 | memcpy_safe(&c->value, source, k); | |
1690 | ||
1691 | *nv = c; | |
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | static bool json_single_ref(JsonVariant *v) { | |
1696 | ||
1697 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
1698 | ||
d520d519 | 1699 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1700 | return false; |
1701 | ||
1702 | if (v->is_embedded) | |
1703 | return json_single_ref(v->parent); | |
1704 | ||
1705 | assert(v->n_ref > 0); | |
1706 | return v->n_ref == 1; | |
1707 | } | |
1708 | ||
1709 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
1710 | JsonVariant *w; | |
1711 | int r; | |
1712 | ||
1713 | assert(v); | |
1714 | ||
1715 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
1716 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
1717 | ||
1718 | if (!*v) | |
1719 | return 0; | |
1720 | ||
1721 | if (source && line > source->max_line) | |
1722 | source->max_line = line; | |
1723 | if (source && column > source->max_column) | |
1724 | source->max_column = column; | |
1725 | ||
d520d519 | 1726 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
1727 | |
1728 | if (!source && line == 0 && column == 0) | |
1729 | return 0; | |
1730 | ||
1731 | } else { | |
1732 | if (json_source_equal((*v)->source, source) && | |
1733 | (*v)->line == line && | |
1734 | (*v)->column == column) | |
1735 | return 0; | |
1736 | ||
1737 | if (json_single_ref(*v)) { /* Sole reference? */ | |
1738 | json_source_unref((*v)->source); | |
1739 | (*v)->source = json_source_ref(source); | |
1740 | (*v)->line = line; | |
1741 | (*v)->column = column; | |
1742 | return 1; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | r = json_variant_copy(&w, *v); | |
1747 | if (r < 0) | |
1748 | return r; | |
1749 | ||
d520d519 | 1750 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
1751 | assert(!w->is_embedded); |
1752 | assert(w->n_ref == 1); | |
1753 | assert(!w->source); | |
1754 | ||
1755 | w->source = json_source_ref(source); | |
1756 | w->line = line; | |
1757 | w->column = column; | |
1758 | ||
1759 | json_variant_unref(*v); | |
1760 | *v = w; | |
1761 | ||
1762 | return 1; | |
1763 | } | |
1764 | ||
1765 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
1766 | assert(line); | |
1767 | assert(column); | |
1768 | assert(s || n == 0); | |
1769 | ||
1770 | while (n > 0) { | |
cd0b6c53 LP |
1771 | if (*s == '\n') { |
1772 | (*line)++; | |
1773 | *column = 1; | |
df7f9e0b | 1774 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
1775 | (*column)++; |
1776 | else { | |
1777 | int w; | |
1778 | ||
92e068b4 | 1779 | w = utf8_encoded_valid_unichar(s, n); |
cd0b6c53 LP |
1780 | if (w < 0) /* count invalid unichars as normal characters */ |
1781 | w = 1; | |
1782 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
1783 | w = (int) n; | |
1784 | ||
1785 | (*column)++; | |
1786 | ||
1787 | s += w; | |
1788 | n -= w; | |
1789 | continue; | |
1790 | } | |
1791 | ||
1792 | s++; | |
1793 | n--; | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
1798 | int aa, bb, cc, dd; | |
1799 | uint16_t x; | |
1800 | ||
1801 | assert(c); | |
1802 | assert(ret); | |
1803 | ||
1804 | aa = unhexchar(c[0]); | |
1805 | if (aa < 0) | |
1806 | return -EINVAL; | |
1807 | ||
1808 | bb = unhexchar(c[1]); | |
1809 | if (bb < 0) | |
1810 | return -EINVAL; | |
1811 | ||
1812 | cc = unhexchar(c[2]); | |
1813 | if (cc < 0) | |
1814 | return -EINVAL; | |
1815 | ||
1816 | dd = unhexchar(c[3]); | |
1817 | if (dd < 0) | |
1818 | return -EINVAL; | |
1819 | ||
1820 | x = ((uint16_t) aa << 12) | | |
1821 | ((uint16_t) bb << 8) | | |
1822 | ((uint16_t) cc << 4) | | |
1823 | ((uint16_t) dd); | |
1824 | ||
1825 | if (x <= 0) | |
1826 | return -EINVAL; | |
1827 | ||
1828 | *ret = x; | |
1829 | ||
1830 | return 0; | |
1831 | } | |
1832 | ||
1833 | static int json_parse_string(const char **p, char **ret) { | |
1834 | _cleanup_free_ char *s = NULL; | |
1835 | size_t n = 0, allocated = 0; | |
1836 | const char *c; | |
1837 | ||
1838 | assert(p); | |
1839 | assert(*p); | |
1840 | assert(ret); | |
1841 | ||
1842 | c = *p; | |
1843 | ||
1844 | if (*c != '"') | |
1845 | return -EINVAL; | |
1846 | ||
1847 | c++; | |
1848 | ||
1849 | for (;;) { | |
1850 | int len; | |
1851 | ||
1852 | /* Check for EOF */ | |
1853 | if (*c == 0) | |
1854 | return -EINVAL; | |
1855 | ||
1856 | /* Check for control characters 0x00..0x1f */ | |
1857 | if (*c > 0 && *c < ' ') | |
1858 | return -EINVAL; | |
1859 | ||
1860 | /* Check for control character 0x7f */ | |
1861 | if (*c == 0x7f) | |
1862 | return -EINVAL; | |
1863 | ||
1864 | if (*c == '"') { | |
1865 | if (!s) { | |
1866 | s = strdup(""); | |
1867 | if (!s) | |
1868 | return -ENOMEM; | |
1869 | } else | |
1870 | s[n] = 0; | |
1871 | ||
1872 | *p = c + 1; | |
1873 | ||
490c5a37 | 1874 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
1875 | return JSON_TOKEN_STRING; |
1876 | } | |
1877 | ||
1878 | if (*c == '\\') { | |
1879 | char ch = 0; | |
1880 | c++; | |
1881 | ||
1882 | if (*c == 0) | |
1883 | return -EINVAL; | |
1884 | ||
1885 | if (IN_SET(*c, '"', '\\', '/')) | |
1886 | ch = *c; | |
1887 | else if (*c == 'b') | |
1888 | ch = '\b'; | |
1889 | else if (*c == 'f') | |
1890 | ch = '\f'; | |
1891 | else if (*c == 'n') | |
1892 | ch = '\n'; | |
1893 | else if (*c == 'r') | |
1894 | ch = '\r'; | |
1895 | else if (*c == 't') | |
1896 | ch = '\t'; | |
1897 | else if (*c == 'u') { | |
1898 | char16_t x; | |
1899 | int r; | |
1900 | ||
1901 | r = unhex_ucs2(c + 1, &x); | |
1902 | if (r < 0) | |
1903 | return r; | |
1904 | ||
1905 | c += 5; | |
1906 | ||
1907 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
1908 | return -ENOMEM; | |
1909 | ||
1910 | if (!utf16_is_surrogate(x)) | |
1911 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
1912 | else if (utf16_is_trailing_surrogate(x)) | |
1913 | return -EINVAL; | |
1914 | else { | |
1915 | char16_t y; | |
1916 | ||
1917 | if (c[0] != '\\' || c[1] != 'u') | |
1918 | return -EINVAL; | |
1919 | ||
1920 | r = unhex_ucs2(c + 2, &y); | |
1921 | if (r < 0) | |
1922 | return r; | |
1923 | ||
1924 | c += 6; | |
1925 | ||
1926 | if (!utf16_is_trailing_surrogate(y)) | |
1927 | return -EINVAL; | |
1928 | ||
1929 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
1930 | } | |
1931 | ||
1932 | continue; | |
1933 | } else | |
1934 | return -EINVAL; | |
1935 | ||
1936 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
1937 | return -ENOMEM; | |
1938 | ||
1939 | s[n++] = ch; | |
1940 | c ++; | |
1941 | continue; | |
1942 | } | |
1943 | ||
92e068b4 | 1944 | len = utf8_encoded_valid_unichar(c, (size_t) -1); |
cd0b6c53 LP |
1945 | if (len < 0) |
1946 | return len; | |
1947 | ||
1948 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
1949 | return -ENOMEM; | |
1950 | ||
1951 | memcpy(s + n, c, len); | |
1952 | n += len; | |
1953 | c += len; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | static int json_parse_number(const char **p, JsonValue *ret) { | |
1958 | bool negative = false, exponent_negative = false, is_real = false; | |
1959 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
1960 | intmax_t i = 0; | |
1961 | uintmax_t u = 0; | |
1962 | const char *c; | |
1963 | ||
1964 | assert(p); | |
1965 | assert(*p); | |
1966 | assert(ret); | |
1967 | ||
1968 | c = *p; | |
1969 | ||
1970 | if (*c == '-') { | |
1971 | negative = true; | |
1972 | c++; | |
1973 | } | |
1974 | ||
1975 | if (*c == '0') | |
1976 | c++; | |
1977 | else { | |
1978 | if (!strchr("123456789", *c) || *c == 0) | |
1979 | return -EINVAL; | |
1980 | ||
1981 | do { | |
1982 | if (!is_real) { | |
1983 | if (negative) { | |
1984 | ||
1985 | if (i < INTMAX_MIN / 10) /* overflow */ | |
1986 | is_real = true; | |
1987 | else { | |
1988 | intmax_t t = 10 * i; | |
1989 | ||
1990 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
1991 | is_real = true; | |
1992 | else | |
1993 | i = t - (*c - '0'); | |
1994 | } | |
1995 | } else { | |
1996 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
1997 | is_real = true; | |
1998 | else { | |
1999 | uintmax_t t = 10 * u; | |
2000 | ||
2001 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
2002 | is_real = true; | |
2003 | else | |
2004 | u = t + (*c - '0'); | |
2005 | } | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | x = 10.0 * x + (*c - '0'); | |
2010 | ||
2011 | c++; | |
2012 | } while (strchr("0123456789", *c) && *c != 0); | |
2013 | } | |
2014 | ||
2015 | if (*c == '.') { | |
2016 | is_real = true; | |
2017 | c++; | |
2018 | ||
2019 | if (!strchr("0123456789", *c) || *c == 0) | |
2020 | return -EINVAL; | |
2021 | ||
2022 | do { | |
2023 | y = 10.0 * y + (*c - '0'); | |
2024 | shift = 10.0 * shift; | |
2025 | c++; | |
2026 | } while (strchr("0123456789", *c) && *c != 0); | |
2027 | } | |
2028 | ||
490c5a37 | 2029 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2030 | is_real = true; |
2031 | c++; | |
2032 | ||
2033 | if (*c == '-') { | |
2034 | exponent_negative = true; | |
2035 | c++; | |
2036 | } else if (*c == '+') | |
2037 | c++; | |
2038 | ||
2039 | if (!strchr("0123456789", *c) || *c == 0) | |
2040 | return -EINVAL; | |
2041 | ||
2042 | do { | |
2043 | exponent = 10.0 * exponent + (*c - '0'); | |
2044 | c++; | |
2045 | } while (strchr("0123456789", *c) && *c != 0); | |
2046 | } | |
2047 | ||
2048 | *p = c; | |
2049 | ||
2050 | if (is_real) { | |
2051 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2052 | return JSON_TOKEN_REAL; | |
2053 | } else if (negative) { | |
2054 | ret->integer = i; | |
2055 | return JSON_TOKEN_INTEGER; | |
2056 | } else { | |
2057 | ret->unsig = u; | |
2058 | return JSON_TOKEN_UNSIGNED; | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | int json_tokenize( | |
2063 | const char **p, | |
2064 | char **ret_string, | |
2065 | JsonValue *ret_value, | |
2066 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2067 | unsigned *ret_column, | |
2068 | void **state, | |
2069 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2070 | unsigned *column) { | |
2071 | ||
2072 | unsigned start_line, start_column; | |
2073 | const char *start, *c; | |
2074 | size_t n; | |
2075 | int t, r; | |
2076 | ||
2077 | enum { | |
2078 | STATE_NULL, | |
2079 | STATE_VALUE, | |
2080 | STATE_VALUE_POST, | |
2081 | }; | |
2082 | ||
2083 | assert(p); | |
2084 | assert(*p); | |
2085 | assert(ret_string); | |
2086 | assert(ret_value); | |
2087 | assert(ret_line); | |
2088 | assert(ret_column); | |
2089 | assert(line); | |
2090 | assert(column); | |
2091 | assert(state); | |
2092 | ||
2093 | t = PTR_TO_INT(*state); | |
2094 | if (t == STATE_NULL) { | |
2095 | *line = 1; | |
2096 | *column = 1; | |
2097 | t = STATE_VALUE; | |
2098 | } | |
2099 | ||
2100 | /* Skip over the whitespace */ | |
2101 | n = strspn(*p, WHITESPACE); | |
2102 | inc_lines_columns(line, column, *p, n); | |
2103 | c = *p + n; | |
2104 | ||
2105 | /* Remember where we started processing this token */ | |
2106 | start = c; | |
2107 | start_line = *line; | |
2108 | start_column = *column; | |
2109 | ||
2110 | if (*c == 0) { | |
2111 | *ret_string = NULL; | |
2112 | *ret_value = JSON_VALUE_NULL; | |
2113 | r = JSON_TOKEN_END; | |
2114 | goto finish; | |
2115 | } | |
2116 | ||
2117 | switch (t) { | |
2118 | ||
2119 | case STATE_VALUE: | |
2120 | ||
2121 | if (*c == '{') { | |
2122 | c++; | |
2123 | *state = INT_TO_PTR(STATE_VALUE); | |
2124 | r = JSON_TOKEN_OBJECT_OPEN; | |
2125 | goto null_return; | |
2126 | ||
2127 | } else if (*c == '}') { | |
2128 | c++; | |
2129 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2130 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2131 | goto null_return; | |
2132 | ||
2133 | } else if (*c == '[') { | |
2134 | c++; | |
2135 | *state = INT_TO_PTR(STATE_VALUE); | |
2136 | r = JSON_TOKEN_ARRAY_OPEN; | |
2137 | goto null_return; | |
2138 | ||
2139 | } else if (*c == ']') { | |
2140 | c++; | |
2141 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2142 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2143 | goto null_return; | |
2144 | ||
2145 | } else if (*c == '"') { | |
2146 | ||
2147 | r = json_parse_string(&c, ret_string); | |
2148 | if (r < 0) | |
2149 | return r; | |
2150 | ||
2151 | *ret_value = JSON_VALUE_NULL; | |
2152 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2153 | goto finish; | |
2154 | ||
2155 | } else if (strchr("-0123456789", *c)) { | |
2156 | ||
2157 | r = json_parse_number(&c, ret_value); | |
2158 | if (r < 0) | |
2159 | return r; | |
2160 | ||
2161 | *ret_string = NULL; | |
2162 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2163 | goto finish; | |
2164 | ||
2165 | } else if (startswith(c, "true")) { | |
2166 | *ret_string = NULL; | |
2167 | ret_value->boolean = true; | |
2168 | c += 4; | |
2169 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2170 | r = JSON_TOKEN_BOOLEAN; | |
2171 | goto finish; | |
2172 | ||
2173 | } else if (startswith(c, "false")) { | |
2174 | *ret_string = NULL; | |
2175 | ret_value->boolean = false; | |
2176 | c += 5; | |
2177 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2178 | r = JSON_TOKEN_BOOLEAN; | |
2179 | goto finish; | |
2180 | ||
2181 | } else if (startswith(c, "null")) { | |
2182 | *ret_string = NULL; | |
2183 | *ret_value = JSON_VALUE_NULL; | |
2184 | c += 4; | |
2185 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2186 | r = JSON_TOKEN_NULL; | |
2187 | goto finish; | |
2188 | ||
2189 | } | |
2190 | ||
2191 | return -EINVAL; | |
2192 | ||
2193 | case STATE_VALUE_POST: | |
2194 | ||
2195 | if (*c == ':') { | |
2196 | c++; | |
2197 | *state = INT_TO_PTR(STATE_VALUE); | |
2198 | r = JSON_TOKEN_COLON; | |
2199 | goto null_return; | |
2200 | ||
2201 | } else if (*c == ',') { | |
2202 | c++; | |
2203 | *state = INT_TO_PTR(STATE_VALUE); | |
2204 | r = JSON_TOKEN_COMMA; | |
2205 | goto null_return; | |
2206 | ||
2207 | } else if (*c == '}') { | |
2208 | c++; | |
2209 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2210 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2211 | goto null_return; | |
2212 | ||
2213 | } else if (*c == ']') { | |
2214 | c++; | |
2215 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2216 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2217 | goto null_return; | |
2218 | } | |
2219 | ||
2220 | return -EINVAL; | |
2221 | ||
2222 | default: | |
2223 | assert_not_reached("Unexpected tokenizer state"); | |
2224 | } | |
2225 | ||
2226 | null_return: | |
2227 | *ret_string = NULL; | |
2228 | *ret_value = JSON_VALUE_NULL; | |
2229 | ||
2230 | finish: | |
2231 | inc_lines_columns(line, column, start, c - start); | |
2232 | *p = c; | |
2233 | ||
2234 | *ret_line = start_line; | |
2235 | *ret_column = start_column; | |
2236 | ||
2237 | return r; | |
2238 | } | |
2239 | ||
2240 | typedef enum JsonExpect { | |
2241 | /* The following values are used by json_parse() */ | |
2242 | EXPECT_TOPLEVEL, | |
2243 | EXPECT_END, | |
2244 | EXPECT_OBJECT_FIRST_KEY, | |
2245 | EXPECT_OBJECT_NEXT_KEY, | |
2246 | EXPECT_OBJECT_COLON, | |
2247 | EXPECT_OBJECT_VALUE, | |
2248 | EXPECT_OBJECT_COMMA, | |
2249 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2250 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2251 | EXPECT_ARRAY_COMMA, | |
2252 | ||
2253 | /* And these are used by json_build() */ | |
2254 | EXPECT_ARRAY_ELEMENT, | |
2255 | EXPECT_OBJECT_KEY, | |
2256 | } JsonExpect; | |
2257 | ||
2258 | typedef struct JsonStack { | |
2259 | JsonExpect expect; | |
2260 | JsonVariant **elements; | |
2261 | size_t n_elements, n_elements_allocated; | |
2262 | unsigned line_before; | |
2263 | unsigned column_before; | |
319a4f27 | 2264 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2265 | } JsonStack; |
2266 | ||
2267 | static void json_stack_release(JsonStack *s) { | |
2268 | assert(s); | |
2269 | ||
2270 | json_variant_unref_many(s->elements, s->n_elements); | |
2271 | s->elements = mfree(s->elements); | |
2272 | } | |
2273 | ||
2274 | static int json_parse_internal( | |
2275 | const char **input, | |
2276 | JsonSource *source, | |
2277 | JsonVariant **ret, | |
2278 | unsigned *line, | |
2279 | unsigned *column, | |
2280 | bool continue_end) { | |
2281 | ||
2282 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2283 | unsigned line_buffer = 0, column_buffer = 0; | |
2284 | void *tokenizer_state = NULL; | |
2285 | JsonStack *stack = NULL; | |
2286 | const char *p; | |
2287 | int r; | |
2288 | ||
2289 | assert_return(input, -EINVAL); | |
2290 | assert_return(ret, -EINVAL); | |
2291 | ||
2292 | p = *input; | |
2293 | ||
2294 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2295 | return -ENOMEM; | |
2296 | ||
2297 | stack[0] = (JsonStack) { | |
2298 | .expect = EXPECT_TOPLEVEL, | |
2299 | }; | |
2300 | ||
2301 | if (!line) | |
2302 | line = &line_buffer; | |
2303 | if (!column) | |
2304 | column = &column_buffer; | |
2305 | ||
2306 | for (;;) { | |
6980b04f | 2307 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
cd0b6c53 LP |
2308 | _cleanup_free_ char *string = NULL; |
2309 | unsigned line_token, column_token; | |
cd0b6c53 LP |
2310 | JsonStack *current; |
2311 | JsonValue value; | |
2312 | int token; | |
2313 | ||
2314 | assert(n_stack > 0); | |
2315 | current = stack + n_stack - 1; | |
2316 | ||
2317 | if (continue_end && current->expect == EXPECT_END) | |
2318 | goto done; | |
2319 | ||
2320 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2321 | if (token < 0) { | |
2322 | r = token; | |
2323 | goto finish; | |
2324 | } | |
2325 | ||
2326 | switch (token) { | |
2327 | ||
2328 | case JSON_TOKEN_END: | |
2329 | if (current->expect != EXPECT_END) { | |
2330 | r = -EINVAL; | |
2331 | goto finish; | |
2332 | } | |
2333 | ||
2334 | assert(current->n_elements == 1); | |
2335 | assert(n_stack == 1); | |
2336 | goto done; | |
2337 | ||
2338 | case JSON_TOKEN_COLON: | |
2339 | ||
2340 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2341 | r = -EINVAL; | |
2342 | goto finish; | |
2343 | } | |
2344 | ||
2345 | current->expect = EXPECT_OBJECT_VALUE; | |
2346 | break; | |
2347 | ||
2348 | case JSON_TOKEN_COMMA: | |
2349 | ||
2350 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2351 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2352 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2353 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2354 | else { | |
2355 | r = -EINVAL; | |
2356 | goto finish; | |
2357 | } | |
2358 | ||
2359 | break; | |
2360 | ||
2361 | case JSON_TOKEN_OBJECT_OPEN: | |
2362 | ||
2363 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2364 | r = -EINVAL; | |
2365 | goto finish; | |
2366 | } | |
2367 | ||
2368 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2369 | r = -ENOMEM; | |
2370 | goto finish; | |
2371 | } | |
2372 | current = stack + n_stack - 1; | |
2373 | ||
2374 | /* Prepare the expect for when we return from the child */ | |
2375 | if (current->expect == EXPECT_TOPLEVEL) | |
2376 | current->expect = EXPECT_END; | |
2377 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2378 | current->expect = EXPECT_OBJECT_COMMA; | |
2379 | else { | |
2380 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2381 | current->expect = EXPECT_ARRAY_COMMA; | |
2382 | } | |
2383 | ||
2384 | stack[n_stack++] = (JsonStack) { | |
2385 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2386 | .line_before = line_token, | |
2387 | .column_before = column_token, | |
2388 | }; | |
2389 | ||
2390 | current = stack + n_stack - 1; | |
2391 | break; | |
2392 | ||
2393 | case JSON_TOKEN_OBJECT_CLOSE: | |
2394 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2395 | r = -EINVAL; | |
2396 | goto finish; | |
2397 | } | |
2398 | ||
2399 | assert(n_stack > 1); | |
2400 | ||
2401 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2402 | if (r < 0) | |
2403 | goto finish; | |
2404 | ||
2405 | line_token = current->line_before; | |
2406 | column_token = current->column_before; | |
2407 | ||
2408 | json_stack_release(current); | |
2409 | n_stack--, current--; | |
2410 | ||
2411 | break; | |
2412 | ||
2413 | case JSON_TOKEN_ARRAY_OPEN: | |
2414 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2415 | r = -EINVAL; | |
2416 | goto finish; | |
2417 | } | |
2418 | ||
2419 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2420 | r = -ENOMEM; | |
2421 | goto finish; | |
2422 | } | |
2423 | current = stack + n_stack - 1; | |
2424 | ||
2425 | /* Prepare the expect for when we return from the child */ | |
2426 | if (current->expect == EXPECT_TOPLEVEL) | |
2427 | current->expect = EXPECT_END; | |
2428 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2429 | current->expect = EXPECT_OBJECT_COMMA; | |
2430 | else { | |
2431 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2432 | current->expect = EXPECT_ARRAY_COMMA; | |
2433 | } | |
2434 | ||
2435 | stack[n_stack++] = (JsonStack) { | |
2436 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2437 | .line_before = line_token, | |
2438 | .column_before = column_token, | |
2439 | }; | |
2440 | ||
2441 | break; | |
2442 | ||
2443 | case JSON_TOKEN_ARRAY_CLOSE: | |
2444 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2445 | r = -EINVAL; | |
2446 | goto finish; | |
2447 | } | |
2448 | ||
2449 | assert(n_stack > 1); | |
2450 | ||
2451 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2452 | if (r < 0) | |
2453 | goto finish; | |
2454 | ||
2455 | line_token = current->line_before; | |
2456 | column_token = current->column_before; | |
2457 | ||
2458 | json_stack_release(current); | |
2459 | n_stack--, current--; | |
2460 | break; | |
2461 | ||
2462 | case JSON_TOKEN_STRING: | |
2463 | 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)) { | |
2464 | r = -EINVAL; | |
2465 | goto finish; | |
2466 | } | |
2467 | ||
2468 | r = json_variant_new_string(&add, string); | |
2469 | if (r < 0) | |
2470 | goto finish; | |
2471 | ||
2472 | if (current->expect == EXPECT_TOPLEVEL) | |
2473 | current->expect = EXPECT_END; | |
2474 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
2475 | current->expect = EXPECT_OBJECT_COLON; | |
2476 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2477 | current->expect = EXPECT_OBJECT_COMMA; | |
2478 | else { | |
2479 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2480 | current->expect = EXPECT_ARRAY_COMMA; | |
2481 | } | |
2482 | ||
2483 | break; | |
2484 | ||
2485 | case JSON_TOKEN_REAL: | |
2486 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2487 | r = -EINVAL; | |
2488 | goto finish; | |
2489 | } | |
2490 | ||
2491 | r = json_variant_new_real(&add, value.real); | |
2492 | if (r < 0) | |
2493 | goto finish; | |
2494 | ||
2495 | if (current->expect == EXPECT_TOPLEVEL) | |
2496 | current->expect = EXPECT_END; | |
2497 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2498 | current->expect = EXPECT_OBJECT_COMMA; | |
2499 | else { | |
2500 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2501 | current->expect = EXPECT_ARRAY_COMMA; | |
2502 | } | |
2503 | ||
2504 | break; | |
2505 | ||
2506 | case JSON_TOKEN_INTEGER: | |
2507 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2508 | r = -EINVAL; | |
2509 | goto finish; | |
2510 | } | |
2511 | ||
2512 | r = json_variant_new_integer(&add, value.integer); | |
2513 | if (r < 0) | |
2514 | goto finish; | |
2515 | ||
2516 | if (current->expect == EXPECT_TOPLEVEL) | |
2517 | current->expect = EXPECT_END; | |
2518 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2519 | current->expect = EXPECT_OBJECT_COMMA; | |
2520 | else { | |
2521 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2522 | current->expect = EXPECT_ARRAY_COMMA; | |
2523 | } | |
2524 | ||
2525 | break; | |
2526 | ||
2527 | case JSON_TOKEN_UNSIGNED: | |
2528 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2529 | r = -EINVAL; | |
2530 | goto finish; | |
2531 | } | |
2532 | ||
2533 | r = json_variant_new_unsigned(&add, value.unsig); | |
2534 | if (r < 0) | |
2535 | goto finish; | |
2536 | ||
2537 | if (current->expect == EXPECT_TOPLEVEL) | |
2538 | current->expect = EXPECT_END; | |
2539 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2540 | current->expect = EXPECT_OBJECT_COMMA; | |
2541 | else { | |
2542 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2543 | current->expect = EXPECT_ARRAY_COMMA; | |
2544 | } | |
2545 | ||
2546 | break; | |
2547 | ||
2548 | case JSON_TOKEN_BOOLEAN: | |
2549 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2550 | r = -EINVAL; | |
2551 | goto finish; | |
2552 | } | |
2553 | ||
2554 | r = json_variant_new_boolean(&add, value.boolean); | |
2555 | if (r < 0) | |
2556 | goto finish; | |
2557 | ||
2558 | if (current->expect == EXPECT_TOPLEVEL) | |
2559 | current->expect = EXPECT_END; | |
2560 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2561 | current->expect = EXPECT_OBJECT_COMMA; | |
2562 | else { | |
2563 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2564 | current->expect = EXPECT_ARRAY_COMMA; | |
2565 | } | |
2566 | ||
2567 | break; | |
2568 | ||
2569 | case JSON_TOKEN_NULL: | |
2570 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2571 | r = -EINVAL; | |
2572 | goto finish; | |
2573 | } | |
2574 | ||
2575 | r = json_variant_new_null(&add); | |
2576 | if (r < 0) | |
2577 | goto finish; | |
2578 | ||
2579 | if (current->expect == EXPECT_TOPLEVEL) | |
2580 | current->expect = EXPECT_END; | |
2581 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2582 | current->expect = EXPECT_OBJECT_COMMA; | |
2583 | else { | |
2584 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2585 | current->expect = EXPECT_ARRAY_COMMA; | |
2586 | } | |
2587 | ||
2588 | break; | |
2589 | ||
2590 | default: | |
2591 | assert_not_reached("Unexpected token"); | |
2592 | } | |
2593 | ||
2594 | if (add) { | |
2595 | (void) json_variant_set_source(&add, source, line_token, column_token); | |
2596 | ||
2597 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
2598 | r = -ENOMEM; | |
2599 | goto finish; | |
2600 | } | |
2601 | ||
6980b04f | 2602 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 LP |
2603 | } |
2604 | } | |
2605 | ||
2606 | done: | |
2607 | assert(n_stack == 1); | |
2608 | assert(stack[0].n_elements == 1); | |
2609 | ||
2610 | *ret = json_variant_ref(stack[0].elements[0]); | |
2611 | *input = p; | |
2612 | r = 0; | |
2613 | ||
2614 | finish: | |
2615 | for (i = 0; i < n_stack; i++) | |
2616 | json_stack_release(stack + i); | |
2617 | ||
2618 | free(stack); | |
2619 | ||
2620 | return r; | |
2621 | } | |
2622 | ||
2623 | int json_parse(const char *input, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2624 | return json_parse_internal(&input, NULL, ret, ret_line, ret_column, false); | |
2625 | } | |
2626 | ||
2627 | int json_parse_continue(const char **p, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2628 | return json_parse_internal(p, NULL, ret, ret_line, ret_column, true); | |
2629 | } | |
2630 | ||
2631 | int json_parse_file(FILE *f, const char *path, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2632 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; | |
2633 | _cleanup_free_ char *text = NULL; | |
2634 | const char *p; | |
2635 | int r; | |
2636 | ||
2637 | if (f) | |
2638 | r = read_full_stream(f, &text, NULL); | |
2639 | else if (path) | |
2640 | r = read_full_file(path, &text, NULL); | |
2641 | else | |
2642 | return -EINVAL; | |
2643 | if (r < 0) | |
2644 | return r; | |
2645 | ||
2646 | if (path) { | |
2647 | source = json_source_new(path); | |
2648 | if (!source) | |
2649 | return -ENOMEM; | |
2650 | } | |
2651 | ||
2652 | p = text; | |
2653 | return json_parse_internal(&p, source, ret, ret_line, ret_column, false); | |
2654 | } | |
2655 | ||
2656 | int json_buildv(JsonVariant **ret, va_list ap) { | |
2657 | JsonStack *stack = NULL; | |
2658 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2659 | int r; | |
2660 | ||
2661 | assert_return(ret, -EINVAL); | |
2662 | ||
2663 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2664 | return -ENOMEM; | |
2665 | ||
2666 | stack[0] = (JsonStack) { | |
2667 | .expect = EXPECT_TOPLEVEL, | |
2668 | }; | |
2669 | ||
2670 | for (;;) { | |
fcadf032 | 2671 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
2672 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
2673 | * have been added to the current variant */ | |
cd0b6c53 LP |
2674 | JsonStack *current; |
2675 | int command; | |
2676 | ||
2677 | assert(n_stack > 0); | |
2678 | current = stack + n_stack - 1; | |
2679 | ||
2680 | if (current->expect == EXPECT_END) | |
2681 | goto done; | |
2682 | ||
2683 | command = va_arg(ap, int); | |
2684 | ||
2685 | switch (command) { | |
2686 | ||
2687 | case _JSON_BUILD_STRING: { | |
2688 | const char *p; | |
2689 | ||
2690 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2691 | r = -EINVAL; | |
2692 | goto finish; | |
2693 | } | |
2694 | ||
2695 | p = va_arg(ap, const char *); | |
2696 | ||
319a4f27 LP |
2697 | if (current->n_suppress == 0) { |
2698 | r = json_variant_new_string(&add, p); | |
2699 | if (r < 0) | |
2700 | goto finish; | |
2701 | } | |
2702 | ||
2703 | n_subtract = 1; | |
cd0b6c53 LP |
2704 | |
2705 | if (current->expect == EXPECT_TOPLEVEL) | |
2706 | current->expect = EXPECT_END; | |
2707 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2708 | current->expect = EXPECT_OBJECT_KEY; | |
2709 | else | |
2710 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2711 | ||
2712 | break; | |
2713 | } | |
2714 | ||
2715 | case _JSON_BUILD_INTEGER: { | |
2716 | intmax_t j; | |
2717 | ||
2718 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2719 | r = -EINVAL; | |
2720 | goto finish; | |
2721 | } | |
2722 | ||
2723 | j = va_arg(ap, intmax_t); | |
2724 | ||
319a4f27 LP |
2725 | if (current->n_suppress == 0) { |
2726 | r = json_variant_new_integer(&add, j); | |
2727 | if (r < 0) | |
2728 | goto finish; | |
2729 | } | |
2730 | ||
2731 | n_subtract = 1; | |
cd0b6c53 LP |
2732 | |
2733 | if (current->expect == EXPECT_TOPLEVEL) | |
2734 | current->expect = EXPECT_END; | |
2735 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2736 | current->expect = EXPECT_OBJECT_KEY; | |
2737 | else | |
2738 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2739 | ||
2740 | break; | |
2741 | } | |
2742 | ||
2743 | case _JSON_BUILD_UNSIGNED: { | |
2744 | uintmax_t j; | |
2745 | ||
2746 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2747 | r = -EINVAL; | |
2748 | goto finish; | |
2749 | } | |
2750 | ||
2751 | j = va_arg(ap, uintmax_t); | |
2752 | ||
319a4f27 LP |
2753 | if (current->n_suppress == 0) { |
2754 | r = json_variant_new_unsigned(&add, j); | |
2755 | if (r < 0) | |
2756 | goto finish; | |
2757 | } | |
2758 | ||
2759 | n_subtract = 1; | |
cd0b6c53 LP |
2760 | |
2761 | if (current->expect == EXPECT_TOPLEVEL) | |
2762 | current->expect = EXPECT_END; | |
2763 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2764 | current->expect = EXPECT_OBJECT_KEY; | |
2765 | else | |
2766 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2767 | ||
2768 | break; | |
2769 | } | |
2770 | ||
2771 | case _JSON_BUILD_REAL: { | |
2772 | long double d; | |
2773 | ||
2774 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2775 | r = -EINVAL; | |
2776 | goto finish; | |
2777 | } | |
2778 | ||
2779 | d = va_arg(ap, long double); | |
2780 | ||
319a4f27 LP |
2781 | if (current->n_suppress == 0) { |
2782 | r = json_variant_new_real(&add, d); | |
2783 | if (r < 0) | |
2784 | goto finish; | |
2785 | } | |
2786 | ||
2787 | n_subtract = 1; | |
cd0b6c53 LP |
2788 | |
2789 | if (current->expect == EXPECT_TOPLEVEL) | |
2790 | current->expect = EXPECT_END; | |
2791 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2792 | current->expect = EXPECT_OBJECT_KEY; | |
2793 | else | |
2794 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2795 | ||
2796 | break; | |
2797 | } | |
2798 | ||
2799 | case _JSON_BUILD_BOOLEAN: { | |
2800 | bool b; | |
2801 | ||
2802 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2803 | r = -EINVAL; | |
2804 | goto finish; | |
2805 | } | |
2806 | ||
2807 | b = va_arg(ap, int); | |
2808 | ||
319a4f27 LP |
2809 | if (current->n_suppress == 0) { |
2810 | r = json_variant_new_boolean(&add, b); | |
2811 | if (r < 0) | |
2812 | goto finish; | |
2813 | } | |
2814 | ||
2815 | n_subtract = 1; | |
cd0b6c53 LP |
2816 | |
2817 | if (current->expect == EXPECT_TOPLEVEL) | |
2818 | current->expect = EXPECT_END; | |
2819 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2820 | current->expect = EXPECT_OBJECT_KEY; | |
2821 | else | |
2822 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2823 | ||
2824 | break; | |
2825 | } | |
2826 | ||
2827 | case _JSON_BUILD_NULL: | |
2828 | ||
2829 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2830 | r = -EINVAL; | |
2831 | goto finish; | |
2832 | } | |
2833 | ||
319a4f27 LP |
2834 | if (current->n_suppress == 0) { |
2835 | r = json_variant_new_null(&add); | |
2836 | if (r < 0) | |
2837 | goto finish; | |
2838 | } | |
2839 | ||
2840 | n_subtract = 1; | |
cd0b6c53 LP |
2841 | |
2842 | if (current->expect == EXPECT_TOPLEVEL) | |
2843 | current->expect = EXPECT_END; | |
2844 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2845 | current->expect = EXPECT_OBJECT_KEY; | |
2846 | else | |
2847 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2848 | ||
2849 | break; | |
2850 | ||
2851 | case _JSON_BUILD_VARIANT: | |
2852 | ||
2853 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2854 | r = -EINVAL; | |
2855 | goto finish; | |
2856 | } | |
2857 | ||
319a4f27 LP |
2858 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
2859 | * allocated anyway... */ | |
cd0b6c53 LP |
2860 | add = va_arg(ap, JsonVariant*); |
2861 | if (!add) | |
2862 | add = JSON_VARIANT_MAGIC_NULL; | |
2863 | else | |
2864 | json_variant_ref(add); | |
2865 | ||
319a4f27 LP |
2866 | n_subtract = 1; |
2867 | ||
cd0b6c53 LP |
2868 | if (current->expect == EXPECT_TOPLEVEL) |
2869 | current->expect = EXPECT_END; | |
2870 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2871 | current->expect = EXPECT_OBJECT_KEY; | |
2872 | else | |
2873 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2874 | ||
2875 | break; | |
2876 | ||
2877 | case _JSON_BUILD_LITERAL: { | |
2878 | const char *l; | |
2879 | ||
2880 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2881 | r = -EINVAL; | |
2882 | goto finish; | |
2883 | } | |
2884 | ||
2885 | l = va_arg(ap, const char *); | |
2886 | ||
319a4f27 LP |
2887 | if (l) { |
2888 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
2889 | * errors even in suppressed object properties */ | |
2890 | ||
cd0b6c53 LP |
2891 | r = json_parse(l, &add, NULL, NULL); |
2892 | if (r < 0) | |
2893 | goto finish; | |
319a4f27 LP |
2894 | } else |
2895 | add = JSON_VARIANT_MAGIC_NULL; | |
2896 | ||
2897 | n_subtract = 1; | |
cd0b6c53 LP |
2898 | |
2899 | if (current->expect == EXPECT_TOPLEVEL) | |
2900 | current->expect = EXPECT_END; | |
2901 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2902 | current->expect = EXPECT_OBJECT_KEY; | |
2903 | else | |
2904 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2905 | ||
2906 | break; | |
2907 | } | |
2908 | ||
2909 | case _JSON_BUILD_ARRAY_BEGIN: | |
2910 | ||
2911 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2912 | r = -EINVAL; | |
2913 | goto finish; | |
2914 | } | |
2915 | ||
2916 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2917 | r = -ENOMEM; | |
2918 | goto finish; | |
2919 | } | |
2920 | current = stack + n_stack - 1; | |
2921 | ||
2922 | if (current->expect == EXPECT_TOPLEVEL) | |
2923 | current->expect = EXPECT_END; | |
2924 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2925 | current->expect = EXPECT_OBJECT_KEY; | |
2926 | else | |
2927 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2928 | ||
2929 | stack[n_stack++] = (JsonStack) { | |
2930 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
2931 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
2932 | * new array, then we should | |
2933 | * also suppress all array | |
2934 | * members */ | |
cd0b6c53 LP |
2935 | }; |
2936 | ||
2937 | break; | |
2938 | ||
2939 | case _JSON_BUILD_ARRAY_END: | |
2940 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
2941 | r = -EINVAL; | |
2942 | goto finish; | |
2943 | } | |
2944 | ||
2945 | assert(n_stack > 1); | |
2946 | ||
319a4f27 LP |
2947 | if (current->n_suppress == 0) { |
2948 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2949 | if (r < 0) | |
2950 | goto finish; | |
2951 | } | |
2952 | ||
2953 | n_subtract = 1; | |
cd0b6c53 LP |
2954 | |
2955 | json_stack_release(current); | |
2956 | n_stack--, current--; | |
2957 | ||
2958 | break; | |
2959 | ||
2960 | case _JSON_BUILD_STRV: { | |
2961 | char **l; | |
2962 | ||
2963 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2964 | r = -EINVAL; | |
2965 | goto finish; | |
2966 | } | |
2967 | ||
2968 | l = va_arg(ap, char **); | |
2969 | ||
319a4f27 LP |
2970 | if (current->n_suppress == 0) { |
2971 | r = json_variant_new_array_strv(&add, l); | |
2972 | if (r < 0) | |
2973 | goto finish; | |
2974 | } | |
2975 | ||
2976 | n_subtract = 1; | |
cd0b6c53 LP |
2977 | |
2978 | if (current->expect == EXPECT_TOPLEVEL) | |
2979 | current->expect = EXPECT_END; | |
2980 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2981 | current->expect = EXPECT_OBJECT_KEY; | |
2982 | else | |
2983 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2984 | ||
2985 | break; | |
2986 | } | |
2987 | ||
2988 | case _JSON_BUILD_OBJECT_BEGIN: | |
2989 | ||
2990 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2991 | r = -EINVAL; | |
2992 | goto finish; | |
2993 | } | |
2994 | ||
2995 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2996 | r = -ENOMEM; | |
2997 | goto finish; | |
2998 | } | |
2999 | current = stack + n_stack - 1; | |
3000 | ||
3001 | if (current->expect == EXPECT_TOPLEVEL) | |
3002 | current->expect = EXPECT_END; | |
3003 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
3004 | current->expect = EXPECT_OBJECT_KEY; | |
3005 | else | |
3006 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
3007 | ||
3008 | stack[n_stack++] = (JsonStack) { | |
3009 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
3010 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3011 | * new object, then we should | |
3012 | * also suppress all object | |
3013 | * members */ | |
cd0b6c53 LP |
3014 | }; |
3015 | ||
3016 | break; | |
3017 | ||
3018 | case _JSON_BUILD_OBJECT_END: | |
3019 | ||
3020 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3021 | r = -EINVAL; | |
3022 | goto finish; | |
3023 | } | |
3024 | ||
3025 | assert(n_stack > 1); | |
3026 | ||
319a4f27 LP |
3027 | if (current->n_suppress == 0) { |
3028 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3029 | if (r < 0) | |
3030 | goto finish; | |
3031 | } | |
3032 | ||
3033 | n_subtract = 1; | |
cd0b6c53 LP |
3034 | |
3035 | json_stack_release(current); | |
3036 | n_stack--, current--; | |
3037 | ||
3038 | break; | |
3039 | ||
3040 | case _JSON_BUILD_PAIR: { | |
3041 | const char *n; | |
3042 | ||
3043 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3044 | r = -EINVAL; | |
3045 | goto finish; | |
3046 | } | |
3047 | ||
3048 | n = va_arg(ap, const char *); | |
3049 | ||
319a4f27 LP |
3050 | if (current->n_suppress == 0) { |
3051 | r = json_variant_new_string(&add, n); | |
3052 | if (r < 0) | |
3053 | goto finish; | |
3054 | } | |
3055 | ||
3056 | n_subtract = 1; | |
3057 | ||
3058 | current->expect = EXPECT_OBJECT_VALUE; | |
3059 | break; | |
3060 | } | |
3061 | ||
3062 | case _JSON_BUILD_PAIR_CONDITION: { | |
3063 | const char *n; | |
3064 | bool b; | |
3065 | ||
3066 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3067 | r = -EINVAL; | |
cd0b6c53 | 3068 | goto finish; |
319a4f27 LP |
3069 | } |
3070 | ||
3071 | b = va_arg(ap, int); | |
3072 | n = va_arg(ap, const char *); | |
3073 | ||
3074 | if (b && current->n_suppress == 0) { | |
3075 | r = json_variant_new_string(&add, n); | |
3076 | if (r < 0) | |
3077 | goto finish; | |
3078 | } | |
3079 | ||
3080 | n_subtract = 1; /* we generated one item */ | |
3081 | ||
3082 | if (!b && current->n_suppress != (size_t) -1) | |
3083 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3084 | |
3085 | current->expect = EXPECT_OBJECT_VALUE; | |
3086 | break; | |
3087 | }} | |
3088 | ||
319a4f27 LP |
3089 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3090 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3091 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3092 | r = -ENOMEM; | |
3093 | goto finish; | |
3094 | } | |
3095 | ||
fcadf032 | 3096 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3097 | } |
319a4f27 LP |
3098 | |
3099 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3100 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3101 | * on this stack level */ | |
3102 | if (current->n_suppress != (size_t) -1) { | |
3103 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3104 | current->n_suppress = 0; | |
3105 | else | |
3106 | current->n_suppress -= n_subtract; | |
3107 | } | |
cd0b6c53 LP |
3108 | } |
3109 | ||
3110 | done: | |
3111 | assert(n_stack == 1); | |
3112 | assert(stack[0].n_elements == 1); | |
3113 | ||
3114 | *ret = json_variant_ref(stack[0].elements[0]); | |
3115 | r = 0; | |
3116 | ||
3117 | finish: | |
3118 | for (i = 0; i < n_stack; i++) | |
3119 | json_stack_release(stack + i); | |
3120 | ||
3121 | free(stack); | |
3122 | ||
cd0b6c53 LP |
3123 | return r; |
3124 | } | |
3125 | ||
3126 | int json_build(JsonVariant **ret, ...) { | |
3127 | va_list ap; | |
3128 | int r; | |
3129 | ||
3130 | va_start(ap, ret); | |
3131 | r = json_buildv(ret, ap); | |
3132 | va_end(ap); | |
3133 | ||
3134 | return r; | |
3135 | } | |
3136 | ||
3137 | int json_log_internal( | |
3138 | JsonVariant *variant, | |
3139 | int level, | |
3140 | int error, | |
3141 | const char *file, | |
3142 | int line, | |
3143 | const char *func, | |
3144 | const char *format, ...) { | |
3145 | ||
3146 | PROTECT_ERRNO; | |
3147 | ||
3148 | unsigned source_line, source_column; | |
3149 | char buffer[LINE_MAX]; | |
3150 | const char *source; | |
3151 | va_list ap; | |
3152 | int r; | |
3153 | ||
fc0f6fbf | 3154 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3155 | |
3156 | va_start(ap, format); | |
3157 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3158 | va_end(ap); | |
3159 | ||
3160 | if (variant) { | |
3161 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3162 | if (r < 0) | |
3163 | return r; | |
3164 | } else { | |
3165 | source = NULL; | |
3166 | source_line = 0; | |
3167 | source_column = 0; | |
3168 | } | |
3169 | ||
3170 | if (source && source_line > 0 && source_column > 0) | |
3171 | return log_struct_internal( | |
3172 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3173 | error, | |
3174 | file, line, func, | |
3175 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3176 | "CONFIG_FILE=%s", source, | |
3177 | "CONFIG_LINE=%u", source_line, | |
3178 | "CONFIG_COLUMN=%u", source_column, | |
13a16a2b | 3179 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
cd0b6c53 LP |
3180 | NULL); |
3181 | else | |
3182 | return log_struct_internal( | |
3183 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3184 | error, | |
3185 | file, line, func, | |
3186 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3187 | LOG_MESSAGE("%s", buffer), | |
3188 | NULL); | |
3189 | } | |
3190 | ||
3191 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3192 | const JsonDispatch *p; | |
3193 | size_t i, n, m; | |
3194 | int r, done = 0; | |
3195 | bool *found; | |
3196 | ||
3197 | if (!json_variant_is_object(v)) { | |
3198 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3199 | ||
3200 | if (flags & JSON_PERMISSIVE) | |
3201 | return 0; | |
3202 | ||
3203 | return -EINVAL; | |
3204 | } | |
3205 | ||
3206 | for (p = table, m = 0; p->name; p++) | |
3207 | m++; | |
3208 | ||
3209 | found = newa0(bool, m); | |
3210 | ||
3211 | n = json_variant_elements(v); | |
3212 | for (i = 0; i < n; i += 2) { | |
3213 | JsonVariant *key, *value; | |
3214 | ||
3215 | assert_se(key = json_variant_by_index(v, i)); | |
3216 | assert_se(value = json_variant_by_index(v, i+1)); | |
3217 | ||
3218 | for (p = table; p->name; p++) | |
3219 | if (p->name == (const char*) -1 || | |
3220 | streq_ptr(json_variant_string(key), p->name)) | |
3221 | break; | |
3222 | ||
3223 | if (p->name) { /* Found a matching entry! :-) */ | |
3224 | JsonDispatchFlags merged_flags; | |
3225 | ||
3226 | merged_flags = flags | p->flags; | |
3227 | ||
3228 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3229 | !json_variant_has_type(value, p->type)) { | |
3230 | ||
3231 | json_log(value, merged_flags, 0, | |
3232 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3233 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3234 | ||
3235 | if (merged_flags & JSON_PERMISSIVE) | |
3236 | continue; | |
3237 | ||
3238 | return -EINVAL; | |
3239 | } | |
3240 | ||
3241 | if (found[p-table]) { | |
3242 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3243 | ||
3244 | if (merged_flags & JSON_PERMISSIVE) | |
3245 | continue; | |
3246 | ||
3247 | return -ENOTUNIQ; | |
3248 | } | |
3249 | ||
3250 | found[p-table] = true; | |
3251 | ||
3252 | if (p->callback) { | |
3253 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3254 | if (r < 0) { | |
3255 | if (merged_flags & JSON_PERMISSIVE) | |
3256 | continue; | |
3257 | ||
3258 | return r; | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | done ++; | |
3263 | ||
3264 | } else { /* Didn't find a matching entry! :-( */ | |
3265 | ||
3266 | if (bad) { | |
3267 | r = bad(json_variant_string(key), value, flags, userdata); | |
3268 | if (r < 0) { | |
3269 | if (flags & JSON_PERMISSIVE) | |
3270 | continue; | |
3271 | ||
3272 | return r; | |
3273 | } else | |
3274 | done ++; | |
3275 | ||
3276 | } else { | |
3277 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3278 | ||
3279 | if (flags & JSON_PERMISSIVE) | |
3280 | continue; | |
3281 | ||
3282 | return -EADDRNOTAVAIL; | |
3283 | } | |
3284 | } | |
3285 | } | |
3286 | ||
3287 | for (p = table; p->name; p++) { | |
3288 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3289 | ||
3290 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3291 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3292 | ||
3293 | if ((merged_flags & JSON_PERMISSIVE)) | |
3294 | continue; | |
3295 | ||
3296 | return -ENXIO; | |
3297 | } | |
3298 | } | |
3299 | ||
3300 | return done; | |
3301 | } | |
3302 | ||
3303 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3304 | bool *b = userdata; | |
3305 | ||
3306 | assert(variant); | |
3307 | assert(b); | |
3308 | ||
02dab76e LP |
3309 | if (!json_variant_is_boolean(variant)) |
3310 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
3311 | |
3312 | *b = json_variant_boolean(variant); | |
3313 | return 0; | |
3314 | } | |
3315 | ||
3316 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3317 | int *b = userdata; | |
3318 | ||
3319 | assert(variant); | |
3320 | assert(b); | |
3321 | ||
02dab76e LP |
3322 | if (!json_variant_is_boolean(variant)) |
3323 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a boolean.", strna(name)); | |
cd0b6c53 LP |
3324 | |
3325 | *b = json_variant_boolean(variant); | |
3326 | return 0; | |
3327 | } | |
3328 | ||
3329 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3330 | intmax_t *i = userdata; | |
3331 | ||
3332 | assert(variant); | |
3333 | assert(i); | |
3334 | ||
02dab76e LP |
3335 | if (!json_variant_is_integer(variant)) |
3336 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 LP |
3337 | |
3338 | *i = json_variant_integer(variant); | |
3339 | return 0; | |
3340 | } | |
3341 | ||
3342 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3343 | uintmax_t *u = userdata; | |
3344 | ||
3345 | assert(variant); | |
3346 | assert(u); | |
3347 | ||
02dab76e LP |
3348 | if (!json_variant_is_unsigned(variant)) |
3349 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 LP |
3350 | |
3351 | *u = json_variant_unsigned(variant); | |
3352 | return 0; | |
3353 | } | |
3354 | ||
3355 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3356 | uint32_t *u = userdata; | |
3357 | ||
3358 | assert(variant); | |
3359 | assert(u); | |
3360 | ||
02dab76e LP |
3361 | if (!json_variant_is_unsigned(variant)) |
3362 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an unsigned integer.", strna(name)); | |
cd0b6c53 | 3363 | |
02dab76e LP |
3364 | if (json_variant_unsigned(variant) > UINT32_MAX) |
3365 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
3366 | |
3367 | *u = (uint32_t) json_variant_unsigned(variant); | |
3368 | return 0; | |
3369 | } | |
3370 | ||
3371 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3372 | int32_t *i = userdata; | |
3373 | ||
3374 | assert(variant); | |
3375 | assert(i); | |
3376 | ||
02dab76e LP |
3377 | if (!json_variant_is_integer(variant)) |
3378 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not an integer.", strna(name)); | |
cd0b6c53 | 3379 | |
02dab76e LP |
3380 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) |
3381 | return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE), "JSON field '%s' out of bounds.", strna(name)); | |
cd0b6c53 LP |
3382 | |
3383 | *i = (int32_t) json_variant_integer(variant); | |
3384 | return 0; | |
3385 | } | |
3386 | ||
3387 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3388 | char **s = userdata; | |
3389 | int r; | |
3390 | ||
3391 | assert(variant); | |
3392 | assert(s); | |
3393 | ||
3394 | if (json_variant_is_null(variant)) { | |
3395 | *s = mfree(*s); | |
3396 | return 0; | |
3397 | } | |
3398 | ||
02dab76e LP |
3399 | if (!json_variant_is_string(variant)) |
3400 | return json_log(variant, flags, SYNTHETIC_ERRNO(EINVAL), "JSON field '%s' is not a string.", strna(name)); | |
cd0b6c53 LP |
3401 | |
3402 | r = free_and_strdup(s, json_variant_string(variant)); | |
3403 | if (r < 0) | |
3404 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
3405 | ||
3406 | return 0; | |
3407 | } | |
3408 | ||
3409 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3410 | _cleanup_strv_free_ char **l = NULL; | |
3411 | char ***s = userdata; | |
ca5e7694 | 3412 | JsonVariant *e; |
cd0b6c53 LP |
3413 | int r; |
3414 | ||
3415 | assert(variant); | |
3416 | assert(s); | |
3417 | ||
3418 | if (json_variant_is_null(variant)) { | |
3419 | *s = strv_free(*s); | |
3420 | return 0; | |
3421 | } | |
3422 | ||
07737617 LP |
3423 | /* Let's be flexible here: accept a single string in place of a single-item array */ |
3424 | if (json_variant_is_string(variant)) { | |
3425 | l = strv_new(json_variant_string(variant)); | |
3426 | if (!l) | |
3427 | return log_oom(); | |
3428 | ||
3429 | strv_free_and_replace(*s, l); | |
3430 | return 0; | |
3431 | } | |
3432 | ||
02dab76e LP |
3433 | if (!json_variant_is_array(variant)) |
3434 | return json_log(variant, SYNTHETIC_ERRNO(EINVAL), flags, "JSON field '%s' is not an array.", strna(name)); | |
cd0b6c53 | 3435 | |
ca5e7694 | 3436 | JSON_VARIANT_ARRAY_FOREACH(e, variant) { |
02dab76e LP |
3437 | if (!json_variant_is_string(e)) |
3438 | return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL), "JSON array element is not a string."); | |
cd0b6c53 LP |
3439 | |
3440 | r = strv_extend(&l, json_variant_string(e)); | |
3441 | if (r < 0) | |
b2bdf6e4 | 3442 | return json_log(e, flags, r, "Failed to append array element: %m"); |
cd0b6c53 LP |
3443 | } |
3444 | ||
3445 | strv_free_and_replace(*s, l); | |
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3450 | JsonVariant **p = userdata; | |
3451 | ||
3452 | assert(variant); | |
3453 | assert(p); | |
3454 | ||
3455 | json_variant_unref(*p); | |
3456 | *p = json_variant_ref(variant); | |
3457 | ||
3458 | return 0; | |
3459 | } | |
3460 | ||
3461 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { | |
3462 | [JSON_VARIANT_STRING] = "string", | |
3463 | [JSON_VARIANT_INTEGER] = "integer", | |
3464 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
3465 | [JSON_VARIANT_REAL] = "real", | |
3466 | [JSON_VARIANT_NUMBER] = "number", | |
3467 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
3468 | [JSON_VARIANT_ARRAY] = "array", | |
3469 | [JSON_VARIANT_OBJECT] = "object", | |
3470 | [JSON_VARIANT_NULL] = "null", | |
3471 | }; | |
3472 | ||
3473 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |