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cd0b6c53 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #include <errno.h> | |
4 | #include <math.h> | |
5 | #include <stdarg.h> | |
6 | #include <stdio_ext.h> | |
7 | #include <stdlib.h> | |
8 | #include <string.h> | |
9 | #include <sys/types.h> | |
10 | ||
11 | #include "sd-messages.h" | |
12 | ||
13 | #include "alloc-util.h" | |
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" | |
21 | #include "string-table.h" | |
22 | #include "string-util.h" | |
23 | #include "strv.h" | |
24 | #include "terminal-util.h" | |
25 | #include "utf8.h" | |
26 | ||
d4a389eb | 27 | /* Refuse putting together variants with a larger depth than 4K by default (as a protection against overflowing stacks |
b2fa0d4f | 28 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
d4a389eb YW |
29 | * remains under 2^16. |
30 | * The value was 16k, but it was discovered to be too high on llvm/x86-64. See also the issue #10738. */ | |
31 | #define DEPTH_MAX (4U*1024U) | |
b2fa0d4f LP |
32 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
33 | ||
cd0b6c53 LP |
34 | typedef struct JsonSource { |
35 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
36 | size_t n_ref; | |
37 | unsigned max_line; | |
38 | unsigned max_column; | |
39 | char name[]; | |
40 | } JsonSource; | |
41 | ||
42 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
43 | struct JsonVariant { | |
44 | union { | |
45 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
46 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
47 | * see below.) */ | |
48 | size_t n_ref; | |
49 | ||
50 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
51 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
52 | JsonVariant *parent; | |
53 | }; | |
54 | ||
a7efb030 LP |
55 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ |
56 | JsonSource *source; | |
57 | unsigned line, column; | |
58 | ||
cd0b6c53 LP |
59 | JsonVariantType type:5; |
60 | ||
61 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
62 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
63 | bool is_embedded:1; | |
64 | ||
65 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
66 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
67 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
68 | bool is_reference:1; | |
69 | ||
70 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
71 | bool is_marked:1; | |
72 | ||
b2fa0d4f LP |
73 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
74 | uint16_t depth; | |
cd0b6c53 LP |
75 | |
76 | union { | |
77 | /* For simple types we store the value in-line. */ | |
78 | JsonValue value; | |
79 | ||
80 | /* For objects and arrays we store the number of elements immediately following */ | |
81 | size_t n_elements; | |
82 | ||
83 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
84 | JsonVariant *reference; | |
85 | ||
86 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
87 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
88 | * element, while longer strings are stored as references. When this object is not embedded into an | |
89 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
90 | * much larger than INLINE_STRING_LENGTH. | |
91 | * | |
92 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
93 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
94 | * would the union and then the struct this is included in. And of structures with undefined size we | |
95 | * can't allocate arrays (at least not easily). */ | |
96 | char string[0]; | |
97 | }; | |
98 | }; | |
99 | ||
100 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
101 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
102 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
103 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
104 | ||
105 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
106 | * (x86-64). */ | |
107 | #ifdef __x86_64__ | |
108 | assert_cc(sizeof(JsonVariant) == 48U); | |
109 | assert_cc(INLINE_STRING_MAX == 15U); | |
110 | #endif | |
111 | ||
112 | static JsonSource* json_source_new(const char *name) { | |
113 | JsonSource *s; | |
114 | ||
115 | assert(name); | |
116 | ||
117 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
118 | if (!s) | |
119 | return NULL; | |
120 | ||
121 | *s = (JsonSource) { | |
122 | .n_ref = 1, | |
123 | }; | |
124 | strcpy(s->name, name); | |
125 | ||
126 | return s; | |
127 | } | |
128 | ||
129 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
130 | ||
131 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
132 | if (a == b) | |
133 | return true; | |
134 | ||
135 | if (!a || !b) | |
136 | return false; | |
137 | ||
138 | return streq(a->name, b->name); | |
139 | } | |
140 | ||
141 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
142 | ||
d520d519 LP |
143 | /* There are four kind of JsonVariant* pointers: |
144 | * | |
145 | * 1. NULL | |
146 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
147 | * 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. | |
148 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
149 | * | |
150 | * The four kinds of pointers can be discerned like this: | |
151 | * | |
152 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
153 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
154 | * 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, | |
155 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
156 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
157 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
158 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
159 | ||
cd0b6c53 | 160 | static bool json_variant_is_magic(const JsonVariant *v) { |
4fcb507a LP |
161 | if (!v) |
162 | return false; | |
163 | ||
164 | return v < _JSON_VARIANT_MAGIC_MAX; | |
cd0b6c53 LP |
165 | } |
166 | ||
d520d519 LP |
167 | static bool json_variant_is_const_string(const JsonVariant *v) { |
168 | ||
169 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
170 | return false; | |
171 | ||
172 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
173 | * hence use all uneven pointers as indicators for const strings. */ | |
174 | ||
175 | return (((uintptr_t) v) & 1) != 0; | |
176 | } | |
177 | ||
178 | static bool json_variant_is_regular(const JsonVariant *v) { | |
179 | ||
180 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
181 | return false; | |
182 | ||
183 | return (((uintptr_t) v) & 1) == 0; | |
cd0b6c53 LP |
184 | } |
185 | ||
186 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
187 | ||
188 | /* Recursively dereference variants that are references to other variants */ | |
189 | ||
190 | if (!v) | |
191 | return NULL; | |
192 | ||
d520d519 | 193 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
194 | return v; |
195 | ||
196 | if (!v->is_reference) | |
197 | return v; | |
198 | ||
199 | return json_variant_dereference(v->reference); | |
200 | } | |
201 | ||
b2fa0d4f LP |
202 | static uint16_t json_variant_depth(JsonVariant *v) { |
203 | ||
204 | v = json_variant_dereference(v); | |
205 | if (!v) | |
206 | return 0; | |
207 | ||
d520d519 | 208 | if (!json_variant_is_regular(v)) |
b2fa0d4f LP |
209 | return 0; |
210 | ||
211 | return v->depth; | |
212 | } | |
213 | ||
cd0b6c53 LP |
214 | static JsonVariant *json_variant_normalize(JsonVariant *v) { |
215 | ||
216 | /* Converts json variants to their normalized form, i.e. fully dereferenced and wherever possible converted to | |
217 | * the "magic" version if there is one */ | |
218 | ||
219 | if (!v) | |
220 | return NULL; | |
221 | ||
222 | v = json_variant_dereference(v); | |
223 | ||
224 | switch (json_variant_type(v)) { | |
225 | ||
226 | case JSON_VARIANT_BOOLEAN: | |
227 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
228 | ||
229 | case JSON_VARIANT_NULL: | |
230 | return JSON_VARIANT_MAGIC_NULL; | |
231 | ||
232 | case JSON_VARIANT_INTEGER: | |
233 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
234 | ||
235 | case JSON_VARIANT_UNSIGNED: | |
236 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
237 | ||
238 | case JSON_VARIANT_REAL: | |
239 | #pragma GCC diagnostic push | |
240 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
241 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; | |
242 | #pragma GCC diagnostic pop | |
243 | ||
244 | case JSON_VARIANT_STRING: | |
245 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
246 | ||
247 | case JSON_VARIANT_ARRAY: | |
248 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
249 | ||
250 | case JSON_VARIANT_OBJECT: | |
251 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
252 | ||
253 | default: | |
254 | return v; | |
255 | } | |
256 | } | |
257 | ||
258 | static JsonVariant *json_variant_conservative_normalize(JsonVariant *v) { | |
259 | ||
260 | /* Much like json_variant_normalize(), but won't simplify if the variant has a source/line location attached to | |
261 | * it, in order not to lose context */ | |
262 | ||
263 | if (!v) | |
264 | return NULL; | |
265 | ||
d520d519 | 266 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
267 | return v; |
268 | ||
269 | if (v->source || v->line > 0 || v->column > 0) | |
270 | return v; | |
271 | ||
272 | return json_variant_normalize(v); | |
273 | } | |
274 | ||
275 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
276 | JsonVariant *v; | |
277 | ||
278 | assert_return(ret, -EINVAL); | |
279 | ||
280 | v = malloc0(offsetof(JsonVariant, value) + space); | |
281 | if (!v) | |
282 | return -ENOMEM; | |
283 | ||
284 | v->n_ref = 1; | |
285 | v->type = type; | |
286 | ||
287 | *ret = v; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
292 | JsonVariant *v; | |
293 | int r; | |
294 | ||
295 | assert_return(ret, -EINVAL); | |
296 | ||
297 | if (i == 0) { | |
298 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
299 | return 0; | |
300 | } | |
301 | ||
302 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
303 | if (r < 0) | |
304 | return r; | |
305 | ||
306 | v->value.integer = i; | |
307 | *ret = v; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
313 | JsonVariant *v; | |
314 | int r; | |
315 | ||
316 | assert_return(ret, -EINVAL); | |
317 | if (u == 0) { | |
318 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
323 | if (r < 0) | |
324 | return r; | |
325 | ||
326 | v->value.unsig = u; | |
327 | *ret = v; | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
333 | JsonVariant *v; | |
334 | int r; | |
335 | ||
336 | assert_return(ret, -EINVAL); | |
337 | ||
338 | #pragma GCC diagnostic push | |
339 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
340 | if (d == 0.0) { | |
341 | #pragma GCC diagnostic pop | |
342 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; | |
343 | return 0; | |
344 | } | |
345 | ||
346 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | v->value.real = d; | |
351 | *ret = v; | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
357 | assert_return(ret, -EINVAL); | |
358 | ||
359 | if (b) | |
360 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
361 | else | |
362 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | int json_variant_new_null(JsonVariant **ret) { | |
368 | assert_return(ret, -EINVAL); | |
369 | ||
370 | *ret = JSON_VARIANT_MAGIC_NULL; | |
371 | return 0; | |
372 | } | |
373 | ||
374 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
375 | JsonVariant *v; | |
376 | int r; | |
377 | ||
378 | assert_return(ret, -EINVAL); | |
379 | if (!s) { | |
380 | assert_return(n == 0, -EINVAL); | |
381 | return json_variant_new_null(ret); | |
382 | } | |
383 | if (n == 0) { | |
384 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
385 | return 0; | |
386 | } | |
387 | ||
388 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); | |
389 | if (r < 0) | |
390 | return r; | |
391 | ||
392 | memcpy(v->string, s, n); | |
393 | v->string[n] = 0; | |
394 | ||
395 | *ret = v; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { | |
400 | assert(a); | |
401 | ||
402 | b = json_variant_dereference(b); | |
403 | if (!b) { | |
404 | a->type = JSON_VARIANT_NULL; | |
405 | return; | |
406 | } | |
407 | ||
408 | a->type = json_variant_type(b); | |
409 | switch (a->type) { | |
410 | ||
411 | case JSON_VARIANT_INTEGER: | |
412 | a->value.integer = json_variant_integer(b); | |
413 | break; | |
414 | ||
415 | case JSON_VARIANT_UNSIGNED: | |
416 | a->value.unsig = json_variant_unsigned(b); | |
417 | break; | |
418 | ||
419 | case JSON_VARIANT_REAL: | |
420 | a->value.real = json_variant_real(b); | |
421 | break; | |
422 | ||
423 | case JSON_VARIANT_BOOLEAN: | |
424 | a->value.boolean = json_variant_boolean(b); | |
425 | break; | |
426 | ||
427 | case JSON_VARIANT_STRING: { | |
428 | const char *s; | |
429 | ||
430 | assert_se(s = json_variant_string(b)); | |
431 | ||
432 | /* Short strings we can store inline */ | |
433 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
434 | strcpy(a->string, s); | |
435 | break; | |
436 | } | |
437 | ||
438 | /* For longer strings, use a reference… */ | |
439 | _fallthrough_; | |
440 | } | |
441 | ||
442 | case JSON_VARIANT_ARRAY: | |
443 | case JSON_VARIANT_OBJECT: | |
444 | a->is_reference = true; | |
445 | a->reference = json_variant_ref(json_variant_conservative_normalize(b)); | |
446 | break; | |
447 | ||
448 | case JSON_VARIANT_NULL: | |
449 | break; | |
450 | ||
451 | default: | |
452 | assert_not_reached("Unexpected variant type"); | |
453 | } | |
454 | } | |
455 | ||
456 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
457 | assert(v); | |
458 | assert(from); | |
459 | ||
d520d519 | 460 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
461 | return; |
462 | ||
463 | v->line = from->line; | |
464 | v->column = from->column; | |
465 | v->source = json_source_ref(from->source); | |
466 | } | |
467 | ||
468 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 469 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
470 | |
471 | assert_return(ret, -EINVAL); | |
472 | if (n == 0) { | |
473 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
474 | return 0; | |
475 | } | |
476 | assert_return(array, -EINVAL); | |
477 | ||
478 | v = new(JsonVariant, n + 1); | |
479 | if (!v) | |
480 | return -ENOMEM; | |
481 | ||
482 | *v = (JsonVariant) { | |
483 | .n_ref = 1, | |
484 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
485 | }; |
486 | ||
b2fa0d4f LP |
487 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
488 | JsonVariant *w = v + 1 + v->n_elements, | |
489 | *c = array[v->n_elements]; | |
490 | uint16_t d; | |
491 | ||
492 | d = json_variant_depth(c); | |
493 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
494 | return -ELNRNG; | |
495 | if (d >= v->depth) | |
496 | v->depth = d + 1; | |
cd0b6c53 LP |
497 | |
498 | *w = (JsonVariant) { | |
499 | .is_embedded = true, | |
500 | .parent = v, | |
501 | }; | |
502 | ||
b2fa0d4f LP |
503 | json_variant_set(w, c); |
504 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
505 | } |
506 | ||
b2fa0d4f | 507 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
508 | return 0; |
509 | } | |
510 | ||
511 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
512 | JsonVariant *v; | |
513 | size_t i; | |
514 | ||
515 | assert_return(ret, -EINVAL); | |
516 | if (n == 0) { | |
517 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
518 | return 0; | |
519 | } | |
520 | assert_return(p, -EINVAL); | |
521 | ||
522 | v = new(JsonVariant, n + 1); | |
523 | if (!v) | |
524 | return -ENOMEM; | |
525 | ||
526 | *v = (JsonVariant) { | |
527 | .n_ref = 1, | |
528 | .type = JSON_VARIANT_ARRAY, | |
529 | .n_elements = n, | |
b2fa0d4f | 530 | .depth = 1, |
cd0b6c53 LP |
531 | }; |
532 | ||
533 | for (i = 0; i < n; i++) { | |
534 | JsonVariant *w = v + 1 + i; | |
535 | ||
536 | *w = (JsonVariant) { | |
537 | .is_embedded = true, | |
538 | .parent = v, | |
a1559e3f LP |
539 | .type = JSON_VARIANT_UNSIGNED, |
540 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 541 | }; |
cd0b6c53 LP |
542 | } |
543 | ||
544 | *ret = v; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
549 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
550 | size_t n; | |
551 | int r; | |
552 | ||
553 | assert(ret); | |
554 | ||
555 | n = strv_length(l); | |
556 | if (n == 0) { | |
557 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
558 | return 0; | |
559 | } | |
560 | ||
a1559e3f | 561 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
562 | if (!v) |
563 | return -ENOMEM; | |
564 | ||
565 | *v = (JsonVariant) { | |
566 | .n_ref = 1, | |
567 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 568 | .depth = 1, |
cd0b6c53 LP |
569 | }; |
570 | ||
571 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
572 | JsonVariant *w = v + 1 + v->n_elements; | |
573 | size_t k; | |
574 | ||
a1559e3f LP |
575 | *w = (JsonVariant) { |
576 | .is_embedded = true, | |
577 | .parent = v, | |
578 | .type = JSON_VARIANT_STRING, | |
579 | }; | |
cd0b6c53 LP |
580 | |
581 | k = strlen(l[v->n_elements]); | |
582 | ||
583 | if (k > INLINE_STRING_MAX) { | |
584 | /* If string is too long, store it as reference. */ | |
585 | ||
586 | r = json_variant_new_stringn(&w->reference, l[v->n_elements], k); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | w->is_reference = true; | |
591 | } else | |
592 | memcpy(w->string, l[v->n_elements], k+1); | |
593 | } | |
594 | ||
595 | *ret = TAKE_PTR(v); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 600 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
601 | |
602 | assert_return(ret, -EINVAL); | |
603 | if (n == 0) { | |
604 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
605 | return 0; | |
606 | } | |
607 | assert_return(array, -EINVAL); | |
608 | assert_return(n % 2 == 0, -EINVAL); | |
609 | ||
610 | v = new(JsonVariant, n + 1); | |
611 | if (!v) | |
612 | return -ENOMEM; | |
613 | ||
614 | *v = (JsonVariant) { | |
615 | .n_ref = 1, | |
616 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
617 | }; |
618 | ||
b2fa0d4f LP |
619 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
620 | JsonVariant *w = v + 1 + v->n_elements, | |
621 | *c = array[v->n_elements]; | |
622 | uint16_t d; | |
623 | ||
d77e781f LP |
624 | if ((v->n_elements & 1) == 0 && |
625 | !json_variant_is_string(c)) | |
626 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
627 | ||
b2fa0d4f LP |
628 | d = json_variant_depth(c); |
629 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
630 | return -ELNRNG; | |
631 | if (d >= v->depth) | |
632 | v->depth = d + 1; | |
cd0b6c53 LP |
633 | |
634 | *w = (JsonVariant) { | |
635 | .is_embedded = true, | |
636 | .parent = v, | |
637 | }; | |
638 | ||
b2fa0d4f LP |
639 | json_variant_set(w, c); |
640 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
641 | } |
642 | ||
b2fa0d4f | 643 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
644 | return 0; |
645 | } | |
646 | ||
647 | static void json_variant_free_inner(JsonVariant *v) { | |
648 | assert(v); | |
649 | ||
d520d519 | 650 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
651 | return; |
652 | ||
653 | json_source_unref(v->source); | |
654 | ||
655 | if (v->is_reference) { | |
656 | json_variant_unref(v->reference); | |
657 | return; | |
658 | } | |
659 | ||
660 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
661 | size_t i; | |
662 | ||
663 | for (i = 0; i < v->n_elements; i++) | |
664 | json_variant_free_inner(v + 1 + i); | |
665 | } | |
666 | } | |
667 | ||
668 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
669 | if (!v) | |
670 | return NULL; | |
d520d519 | 671 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
672 | return v; |
673 | ||
674 | if (v->is_embedded) | |
675 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
676 | else { | |
677 | assert(v->n_ref > 0); | |
678 | v->n_ref++; | |
679 | } | |
680 | ||
681 | return v; | |
682 | } | |
683 | ||
684 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
685 | if (!v) | |
686 | return NULL; | |
d520d519 | 687 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
688 | return NULL; |
689 | ||
690 | if (v->is_embedded) | |
691 | json_variant_unref(v->parent); | |
692 | else { | |
693 | assert(v->n_ref > 0); | |
694 | v->n_ref--; | |
695 | ||
696 | if (v->n_ref == 0) { | |
697 | json_variant_free_inner(v); | |
698 | free(v); | |
699 | } | |
700 | } | |
701 | ||
702 | return NULL; | |
703 | } | |
704 | ||
705 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
706 | size_t i; | |
707 | ||
708 | assert(array || n == 0); | |
709 | ||
710 | for (i = 0; i < n; i++) | |
711 | json_variant_unref(array[i]); | |
712 | } | |
713 | ||
714 | const char *json_variant_string(JsonVariant *v) { | |
715 | if (!v) | |
716 | return NULL; | |
717 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
718 | return ""; | |
719 | if (json_variant_is_magic(v)) | |
720 | goto mismatch; | |
d520d519 LP |
721 | if (json_variant_is_const_string(v)) { |
722 | uintptr_t p = (uintptr_t) v; | |
723 | ||
724 | assert((p & 1) != 0); | |
725 | return (const char*) (p ^ 1U); | |
726 | } | |
727 | ||
cd0b6c53 LP |
728 | if (v->is_reference) |
729 | return json_variant_string(v->reference); | |
730 | if (v->type != JSON_VARIANT_STRING) | |
731 | goto mismatch; | |
732 | ||
733 | return v->string; | |
734 | ||
735 | mismatch: | |
736 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
737 | return NULL; | |
738 | } | |
739 | ||
740 | bool json_variant_boolean(JsonVariant *v) { | |
741 | if (!v) | |
742 | goto mismatch; | |
743 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
744 | return true; | |
745 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
746 | return false; | |
d520d519 | 747 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
748 | goto mismatch; |
749 | if (v->type != JSON_VARIANT_BOOLEAN) | |
750 | goto mismatch; | |
751 | if (v->is_reference) | |
752 | return json_variant_boolean(v->reference); | |
753 | ||
754 | return v->value.boolean; | |
755 | ||
756 | mismatch: | |
757 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
758 | return false; | |
759 | } | |
760 | ||
761 | intmax_t json_variant_integer(JsonVariant *v) { | |
762 | if (!v) | |
763 | goto mismatch; | |
764 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
765 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
766 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
767 | return 0; | |
d520d519 | 768 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
769 | goto mismatch; |
770 | if (v->is_reference) | |
771 | return json_variant_integer(v->reference); | |
772 | ||
773 | switch (v->type) { | |
774 | ||
775 | case JSON_VARIANT_INTEGER: | |
776 | return v->value.integer; | |
777 | ||
778 | case JSON_VARIANT_UNSIGNED: | |
779 | if (v->value.unsig <= INTMAX_MAX) | |
780 | return (intmax_t) v->value.unsig; | |
781 | ||
782 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
783 | return 0; | |
784 | ||
785 | case JSON_VARIANT_REAL: { | |
786 | intmax_t converted; | |
787 | ||
788 | converted = (intmax_t) v->value.real; | |
789 | ||
790 | #pragma GCC diagnostic push | |
791 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
792 | if ((long double) converted == v->value.real) | |
793 | #pragma GCC diagnostic pop | |
794 | return converted; | |
795 | ||
796 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | default: | |
801 | break; | |
802 | } | |
803 | ||
804 | mismatch: | |
805 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
806 | return 0; | |
807 | } | |
808 | ||
809 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
810 | if (!v) | |
811 | goto mismatch; | |
812 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
813 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
814 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
815 | return 0; | |
d520d519 | 816 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
817 | goto mismatch; |
818 | if (v->is_reference) | |
819 | return json_variant_integer(v->reference); | |
820 | ||
821 | switch (v->type) { | |
822 | ||
823 | case JSON_VARIANT_INTEGER: | |
824 | if (v->value.integer >= 0) | |
825 | return (uintmax_t) v->value.integer; | |
826 | ||
827 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
828 | return 0; | |
829 | ||
830 | case JSON_VARIANT_UNSIGNED: | |
831 | return v->value.unsig; | |
832 | ||
833 | case JSON_VARIANT_REAL: { | |
834 | uintmax_t converted; | |
835 | ||
836 | converted = (uintmax_t) v->value.real; | |
837 | ||
838 | #pragma GCC diagnostic push | |
839 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
840 | if ((long double) converted == v->value.real) | |
841 | #pragma GCC diagnostic pop | |
842 | return converted; | |
843 | ||
844 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | default: | |
849 | break; | |
850 | } | |
851 | ||
852 | mismatch: | |
853 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
854 | return 0; | |
855 | } | |
856 | ||
857 | long double json_variant_real(JsonVariant *v) { | |
858 | if (!v) | |
859 | return 0.0; | |
860 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
861 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
862 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
863 | return 0.0; | |
d520d519 | 864 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
865 | goto mismatch; |
866 | if (v->is_reference) | |
867 | return json_variant_real(v->reference); | |
868 | ||
869 | switch (v->type) { | |
870 | ||
871 | case JSON_VARIANT_REAL: | |
872 | return v->value.real; | |
873 | ||
874 | case JSON_VARIANT_INTEGER: { | |
875 | long double converted; | |
876 | ||
877 | converted = (long double) v->value.integer; | |
878 | ||
879 | if ((intmax_t) converted == v->value.integer) | |
880 | return converted; | |
881 | ||
882 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
883 | return 0.0; | |
884 | } | |
885 | ||
886 | case JSON_VARIANT_UNSIGNED: { | |
887 | long double converted; | |
888 | ||
889 | converted = (long double) v->value.unsig; | |
890 | ||
891 | if ((uintmax_t) converted == v->value.unsig) | |
892 | return converted; | |
893 | ||
894 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
895 | return 0.0; | |
896 | } | |
897 | ||
898 | default: | |
899 | break; | |
900 | } | |
901 | ||
902 | mismatch: | |
903 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 904 | return 0.0; |
cd0b6c53 LP |
905 | } |
906 | ||
907 | bool json_variant_is_negative(JsonVariant *v) { | |
908 | if (!v) | |
909 | goto mismatch; | |
910 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
911 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
912 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
913 | return false; | |
d520d519 | 914 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
915 | goto mismatch; |
916 | if (v->is_reference) | |
917 | return json_variant_is_negative(v->reference); | |
918 | ||
919 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
920 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
921 | * values. */ | |
922 | ||
923 | switch (v->type) { | |
924 | ||
925 | case JSON_VARIANT_REAL: | |
926 | return v->value.real < 0; | |
927 | ||
928 | case JSON_VARIANT_INTEGER: | |
929 | return v->value.integer < 0; | |
930 | ||
931 | case JSON_VARIANT_UNSIGNED: | |
932 | return false; | |
933 | ||
934 | default: | |
935 | break; | |
936 | } | |
937 | ||
938 | mismatch: | |
939 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
940 | return false; | |
941 | } | |
942 | ||
943 | JsonVariantType json_variant_type(JsonVariant *v) { | |
944 | ||
945 | if (!v) | |
946 | return _JSON_VARIANT_TYPE_INVALID; | |
947 | ||
d520d519 LP |
948 | if (json_variant_is_const_string(v)) |
949 | return JSON_VARIANT_STRING; | |
950 | ||
cd0b6c53 LP |
951 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
952 | return JSON_VARIANT_BOOLEAN; | |
953 | ||
954 | if (v == JSON_VARIANT_MAGIC_NULL) | |
955 | return JSON_VARIANT_NULL; | |
956 | ||
957 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
958 | return JSON_VARIANT_INTEGER; | |
959 | ||
960 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
961 | return JSON_VARIANT_UNSIGNED; | |
962 | ||
963 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
964 | return JSON_VARIANT_REAL; | |
965 | ||
966 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
967 | return JSON_VARIANT_STRING; | |
968 | ||
969 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
970 | return JSON_VARIANT_ARRAY; | |
971 | ||
972 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
973 | return JSON_VARIANT_OBJECT; | |
974 | ||
975 | return v->type; | |
976 | } | |
977 | ||
978 | bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { | |
979 | JsonVariantType rt; | |
980 | ||
981 | v = json_variant_dereference(v); | |
f8c186c9 LP |
982 | if (!v) |
983 | return false; | |
cd0b6c53 LP |
984 | |
985 | rt = json_variant_type(v); | |
986 | if (rt == type) | |
987 | return true; | |
988 | ||
d520d519 LP |
989 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
990 | if (json_variant_is_const_string(v)) | |
991 | return false; | |
992 | ||
cd0b6c53 LP |
993 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
994 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
995 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
996 | return true; | |
997 | ||
998 | /* All other magic variant types are only equal to themselves */ | |
999 | if (json_variant_is_magic(v)) | |
1000 | return false; | |
1001 | ||
1002 | /* Handle the "number" pseudo type */ | |
1003 | if (type == JSON_VARIANT_NUMBER) | |
1004 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1005 | ||
1006 | /* Integer conversions are OK in many cases */ | |
1007 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1008 | return v->value.integer >= 0; | |
1009 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1010 | return v->value.unsig <= INTMAX_MAX; | |
1011 | ||
1012 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1013 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1014 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1015 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1016 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1017 | ||
1018 | #pragma GCC diagnostic push | |
1019 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1020 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ | |
1021 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1022 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1023 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1024 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
1025 | #pragma GCC diagnostic pop | |
1026 | ||
1027 | return false; | |
1028 | } | |
1029 | ||
1030 | size_t json_variant_elements(JsonVariant *v) { | |
1031 | if (!v) | |
1032 | return 0; | |
1033 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1034 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1035 | return 0; | |
d520d519 | 1036 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1037 | goto mismatch; |
1038 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1039 | goto mismatch; | |
1040 | if (v->is_reference) | |
1041 | return json_variant_elements(v->reference); | |
1042 | ||
1043 | return v->n_elements; | |
1044 | ||
1045 | mismatch: | |
1046 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1051 | if (!v) | |
1052 | return NULL; | |
1053 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1054 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1055 | return NULL; | |
d520d519 | 1056 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1057 | goto mismatch; |
1058 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1059 | goto mismatch; | |
1060 | if (v->is_reference) | |
1061 | return json_variant_by_index(v->reference, idx); | |
1062 | if (idx >= v->n_elements) | |
1063 | return NULL; | |
1064 | ||
1065 | return json_variant_conservative_normalize(v + 1 + idx); | |
1066 | ||
1067 | mismatch: | |
1068 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1069 | return NULL; | |
1070 | } | |
1071 | ||
1072 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1073 | size_t i; | |
1074 | ||
1075 | if (!v) | |
1076 | goto not_found; | |
1077 | if (!key) | |
1078 | goto not_found; | |
1079 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1080 | goto not_found; | |
d520d519 | 1081 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1082 | goto mismatch; |
1083 | if (v->type != JSON_VARIANT_OBJECT) | |
1084 | goto mismatch; | |
1085 | if (v->is_reference) | |
1086 | return json_variant_by_key(v->reference, key); | |
1087 | ||
1088 | for (i = 0; i < v->n_elements; i += 2) { | |
1089 | JsonVariant *p; | |
1090 | ||
1091 | p = json_variant_dereference(v + 1 + i); | |
1092 | ||
1093 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1094 | continue; | |
1095 | ||
1096 | if (streq(json_variant_string(p), key)) { | |
1097 | ||
1098 | if (ret_key) | |
1099 | *ret_key = json_variant_conservative_normalize(v + 1 + i); | |
1100 | ||
1101 | return json_variant_conservative_normalize(v + 1 + i + 1); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | not_found: | |
1106 | if (ret_key) | |
1107 | *ret_key = NULL; | |
1108 | ||
1109 | return NULL; | |
1110 | ||
1111 | mismatch: | |
1112 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1113 | if (ret_key) | |
1114 | *ret_key = NULL; | |
1115 | ||
1116 | return NULL; | |
1117 | } | |
1118 | ||
1119 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1120 | return json_variant_by_key_full(v, key, NULL); | |
1121 | } | |
1122 | ||
1123 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1124 | JsonVariantType t; | |
1125 | ||
1126 | a = json_variant_normalize(a); | |
1127 | b = json_variant_normalize(b); | |
1128 | ||
1129 | if (a == b) | |
1130 | return true; | |
1131 | ||
1132 | t = json_variant_type(a); | |
1133 | if (!json_variant_has_type(b, t)) | |
1134 | return false; | |
1135 | ||
1136 | switch (t) { | |
1137 | ||
1138 | case JSON_VARIANT_STRING: | |
1139 | return streq(json_variant_string(a), json_variant_string(b)); | |
1140 | ||
1141 | case JSON_VARIANT_INTEGER: | |
1142 | return json_variant_integer(a) == json_variant_integer(b); | |
1143 | ||
1144 | case JSON_VARIANT_UNSIGNED: | |
1145 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1146 | ||
1147 | case JSON_VARIANT_REAL: | |
1148 | #pragma GCC diagnostic push | |
1149 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1150 | return json_variant_real(a) == json_variant_real(b); | |
1151 | #pragma GCC diagnostic pop | |
1152 | ||
1153 | case JSON_VARIANT_BOOLEAN: | |
1154 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1155 | ||
1156 | case JSON_VARIANT_NULL: | |
1157 | return true; | |
1158 | ||
1159 | case JSON_VARIANT_ARRAY: { | |
1160 | size_t i, n; | |
1161 | ||
1162 | n = json_variant_elements(a); | |
1163 | if (n != json_variant_elements(b)) | |
1164 | return false; | |
1165 | ||
1166 | for (i = 0; i < n; i++) { | |
1167 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1168 | return false; | |
1169 | } | |
1170 | ||
1171 | return true; | |
1172 | } | |
1173 | ||
1174 | case JSON_VARIANT_OBJECT: { | |
1175 | size_t i, n; | |
1176 | ||
1177 | n = json_variant_elements(a); | |
1178 | if (n != json_variant_elements(b)) | |
1179 | return false; | |
1180 | ||
1181 | /* Iterate through all keys in 'a' */ | |
1182 | for (i = 0; i < n; i += 2) { | |
1183 | bool found = false; | |
1184 | size_t j; | |
1185 | ||
1186 | /* Match them against all keys in 'b' */ | |
1187 | for (j = 0; j < n; j += 2) { | |
1188 | JsonVariant *key_b; | |
1189 | ||
1190 | key_b = json_variant_by_index(b, j); | |
1191 | ||
1192 | /* During the first iteration unmark everything */ | |
1193 | if (i == 0) | |
1194 | key_b->is_marked = false; | |
1195 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1196 | continue; | |
1197 | ||
1198 | if (found) | |
1199 | continue; | |
1200 | ||
1201 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1202 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1203 | /* Key and values match! */ | |
1204 | key_b->is_marked = found = true; | |
1205 | ||
1206 | /* In the first iteration we continue the inner loop since we want to mark | |
1207 | * everything, otherwise exit the loop quickly after we found what we were | |
1208 | * looking for. */ | |
1209 | if (i != 0) | |
1210 | break; | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | if (!found) | |
1215 | return false; | |
1216 | } | |
1217 | ||
1218 | return true; | |
1219 | } | |
1220 | ||
1221 | default: | |
1222 | assert_not_reached("Unknown variant type."); | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { | |
1227 | assert_return(v, -EINVAL); | |
1228 | ||
1229 | if (ret_source) | |
d520d519 | 1230 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1231 | |
1232 | if (ret_line) | |
d520d519 | 1233 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1234 | |
1235 | if (ret_column) | |
d520d519 | 1236 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1237 | |
1238 | return 0; | |
1239 | } | |
1240 | ||
897f099b | 1241 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1242 | size_t w, k; |
1243 | ||
1244 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1245 | return 0; | |
1246 | ||
d520d519 | 1247 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1248 | return 0; |
1249 | ||
1250 | if (!v->source && v->line == 0 && v->column == 0) | |
1251 | return 0; | |
1252 | ||
1253 | /* The max width we need to format the line numbers for this source file */ | |
1254 | w = (v->source && v->source->max_line > 0) ? | |
1255 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1256 | DECIMAL_STR_MAX(unsigned)-1; | |
1257 | k = (v->source && v->source->max_column > 0) ? | |
1258 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1259 | DECIMAL_STR_MAX(unsigned) -1; | |
1260 | ||
1261 | if (whitespace) { | |
1262 | size_t i, n; | |
1263 | ||
1264 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1265 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1266 | (v->line > 0 ? w : 0) + | |
1267 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1268 | (v->column > 0 ? k : 0) + | |
1269 | 2; | |
1270 | ||
1271 | for (i = 0; i < n; i++) | |
1272 | fputc(' ', f); | |
1273 | } else { | |
1274 | fputc('[', f); | |
1275 | ||
1276 | if (v->source) | |
1277 | fputs(v->source->name, f); | |
1278 | if (v->source && (v->line > 0 || v->column > 0)) | |
1279 | fputc(':', f); | |
1280 | if (v->line > 0) | |
1281 | fprintf(f, "%*u", (int) w, v->line); | |
1282 | if ((v->source || v->line > 0) || v->column > 0) | |
1283 | fputc(':', f); | |
1284 | if (v->column > 0) | |
1285 | fprintf(f, "%*u", (int) k, v->column); | |
1286 | ||
1287 | fputc(']', f); | |
1288 | fputc(' ', f); | |
1289 | } | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
897f099b | 1294 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1295 | int r; |
1296 | ||
1297 | assert(f); | |
1298 | assert(v); | |
1299 | ||
1300 | switch (json_variant_type(v)) { | |
1301 | ||
1302 | case JSON_VARIANT_REAL: { | |
1303 | locale_t loc; | |
1304 | ||
1305 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1306 | if (loc == (locale_t) 0) | |
1307 | return -errno; | |
1308 | ||
1309 | if (flags & JSON_FORMAT_COLOR) | |
1310 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1311 | ||
1312 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1313 | ||
1314 | if (flags & JSON_FORMAT_COLOR) | |
1315 | fputs(ANSI_NORMAL, f); | |
1316 | ||
1317 | freelocale(loc); | |
1318 | break; | |
1319 | } | |
1320 | ||
1321 | case JSON_VARIANT_INTEGER: | |
1322 | if (flags & JSON_FORMAT_COLOR) | |
1323 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1324 | ||
1325 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1326 | ||
1327 | if (flags & JSON_FORMAT_COLOR) | |
1328 | fputs(ANSI_NORMAL, f); | |
1329 | break; | |
1330 | ||
1331 | case JSON_VARIANT_UNSIGNED: | |
1332 | if (flags & JSON_FORMAT_COLOR) | |
1333 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1334 | ||
1335 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1336 | ||
1337 | if (flags & JSON_FORMAT_COLOR) | |
1338 | fputs(ANSI_NORMAL, f); | |
1339 | break; | |
1340 | ||
1341 | case JSON_VARIANT_BOOLEAN: | |
1342 | ||
1343 | if (flags & JSON_FORMAT_COLOR) | |
1344 | fputs(ANSI_HIGHLIGHT, f); | |
1345 | ||
1346 | if (json_variant_boolean(v)) | |
1347 | fputs("true", f); | |
1348 | else | |
1349 | fputs("false", f); | |
1350 | ||
1351 | if (flags & JSON_FORMAT_COLOR) | |
1352 | fputs(ANSI_NORMAL, f); | |
1353 | ||
1354 | break; | |
1355 | ||
1356 | case JSON_VARIANT_NULL: | |
1357 | if (flags & JSON_FORMAT_COLOR) | |
1358 | fputs(ANSI_HIGHLIGHT, f); | |
1359 | ||
1360 | fputs("null", f); | |
1361 | ||
1362 | if (flags & JSON_FORMAT_COLOR) | |
1363 | fputs(ANSI_NORMAL, f); | |
1364 | break; | |
1365 | ||
1366 | case JSON_VARIANT_STRING: { | |
1367 | const char *q; | |
1368 | ||
1369 | fputc('"', f); | |
1370 | ||
1371 | if (flags & JSON_FORMAT_COLOR) | |
1372 | fputs(ANSI_GREEN, f); | |
1373 | ||
1374 | for (q = json_variant_string(v); *q; q++) { | |
1375 | ||
1376 | switch (*q) { | |
1377 | ||
1378 | case '"': | |
1379 | fputs("\\\"", f); | |
1380 | break; | |
1381 | ||
1382 | case '\\': | |
1383 | fputs("\\\\", f); | |
1384 | break; | |
1385 | ||
cd0b6c53 LP |
1386 | case '\b': |
1387 | fputs("\\b", f); | |
1388 | break; | |
1389 | ||
1390 | case '\f': | |
1391 | fputs("\\f", f); | |
1392 | break; | |
1393 | ||
1394 | case '\n': | |
1395 | fputs("\\n", f); | |
1396 | break; | |
1397 | ||
1398 | case '\r': | |
1399 | fputs("\\r", f); | |
1400 | break; | |
1401 | ||
1402 | case '\t': | |
1403 | fputs("\\t", f); | |
1404 | break; | |
1405 | ||
1406 | default: | |
df7f9e0b | 1407 | if ((signed char) *q >= 0 && *q < ' ') |
cd0b6c53 LP |
1408 | fprintf(f, "\\u%04x", *q); |
1409 | else | |
1410 | fputc(*q, f); | |
1411 | break; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | if (flags & JSON_FORMAT_COLOR) | |
1416 | fputs(ANSI_NORMAL, f); | |
1417 | ||
1418 | fputc('"', f); | |
1419 | break; | |
1420 | } | |
1421 | ||
1422 | case JSON_VARIANT_ARRAY: { | |
1423 | size_t i, n; | |
1424 | ||
1425 | n = json_variant_elements(v); | |
1426 | ||
1427 | if (n == 0) | |
1428 | fputs("[]", f); | |
1429 | else { | |
4ae7e4e5 | 1430 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1431 | const char *prefix2; |
1432 | ||
1433 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1434 | joined = strjoin(strempty(prefix), "\t"); |
1435 | if (!joined) | |
1436 | return -ENOMEM; | |
1437 | ||
1438 | prefix2 = joined; | |
cd0b6c53 LP |
1439 | fputs("[\n", f); |
1440 | } else { | |
1441 | prefix2 = strempty(prefix); | |
1442 | fputc('[', f); | |
1443 | } | |
1444 | ||
1445 | for (i = 0; i < n; i++) { | |
1446 | JsonVariant *e; | |
1447 | ||
1448 | assert_se(e = json_variant_by_index(v, i)); | |
1449 | ||
1450 | if (i > 0) { | |
1451 | if (flags & JSON_FORMAT_PRETTY) | |
1452 | fputs(",\n", f); | |
1453 | else | |
1454 | fputc(',', f); | |
1455 | } | |
1456 | ||
1457 | if (flags & JSON_FORMAT_PRETTY) { | |
1458 | print_source(f, e, flags, false); | |
1459 | fputs(prefix2, f); | |
1460 | } | |
1461 | ||
1462 | r = json_format(f, e, flags, prefix2); | |
1463 | if (r < 0) | |
1464 | return r; | |
1465 | } | |
1466 | ||
1467 | if (flags & JSON_FORMAT_PRETTY) { | |
1468 | fputc('\n', f); | |
1469 | print_source(f, v, flags, true); | |
1470 | fputs(strempty(prefix), f); | |
1471 | } | |
1472 | ||
1473 | fputc(']', f); | |
1474 | } | |
1475 | break; | |
1476 | } | |
1477 | ||
1478 | case JSON_VARIANT_OBJECT: { | |
1479 | size_t i, n; | |
1480 | ||
1481 | n = json_variant_elements(v); | |
1482 | ||
1483 | if (n == 0) | |
1484 | fputs("{}", f); | |
1485 | else { | |
4ae7e4e5 | 1486 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1487 | const char *prefix2; |
1488 | ||
1489 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1490 | joined = strjoin(strempty(prefix), "\t"); |
1491 | if (!joined) | |
1492 | return -ENOMEM; | |
1493 | ||
1494 | prefix2 = joined; | |
cd0b6c53 LP |
1495 | fputs("{\n", f); |
1496 | } else { | |
1497 | prefix2 = strempty(prefix); | |
1498 | fputc('{', f); | |
1499 | } | |
1500 | ||
1501 | for (i = 0; i < n; i += 2) { | |
1502 | JsonVariant *e; | |
1503 | ||
1504 | e = json_variant_by_index(v, i); | |
1505 | ||
1506 | if (i > 0) { | |
1507 | if (flags & JSON_FORMAT_PRETTY) | |
1508 | fputs(",\n", f); | |
1509 | else | |
1510 | fputc(',', f); | |
1511 | } | |
1512 | ||
1513 | if (flags & JSON_FORMAT_PRETTY) { | |
1514 | print_source(f, e, flags, false); | |
1515 | fputs(prefix2, f); | |
1516 | } | |
1517 | ||
1518 | r = json_format(f, e, flags, prefix2); | |
1519 | if (r < 0) | |
1520 | return r; | |
1521 | ||
1522 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1523 | ||
1524 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1525 | if (r < 0) | |
1526 | return r; | |
1527 | } | |
1528 | ||
1529 | if (flags & JSON_FORMAT_PRETTY) { | |
1530 | fputc('\n', f); | |
1531 | print_source(f, v, flags, true); | |
1532 | fputs(strempty(prefix), f); | |
1533 | } | |
1534 | ||
1535 | fputc('}', f); | |
1536 | } | |
1537 | break; | |
1538 | } | |
1539 | ||
1540 | default: | |
1541 | assert_not_reached("Unexpected variant type."); | |
1542 | } | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
897f099b | 1547 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1548 | _cleanup_free_ char *s = NULL; |
1549 | size_t sz = 0; | |
1550 | int r; | |
1551 | ||
1552 | assert_return(v, -EINVAL); | |
1553 | assert_return(ret, -EINVAL); | |
1554 | ||
1555 | { | |
1556 | _cleanup_fclose_ FILE *f = NULL; | |
1557 | ||
1558 | f = open_memstream(&s, &sz); | |
1559 | if (!f) | |
1560 | return -ENOMEM; | |
1561 | ||
1562 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); | |
1563 | ||
1564 | json_variant_dump(v, flags, f, NULL); | |
1565 | ||
1566 | r = fflush_and_check(f); | |
1567 | } | |
1568 | if (r < 0) | |
1569 | return r; | |
1570 | ||
1571 | assert(s); | |
1572 | *ret = TAKE_PTR(s); | |
1573 | ||
1574 | return (int) sz; | |
1575 | } | |
1576 | ||
897f099b | 1577 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1578 | if (!v) |
1579 | return; | |
1580 | ||
1581 | if (!f) | |
1582 | f = stdout; | |
1583 | ||
1584 | print_source(f, v, flags, false); | |
1585 | ||
ab91733c LP |
1586 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1587 | flags |= JSON_FORMAT_COLOR; | |
1588 | ||
cd0b6c53 LP |
1589 | if (flags & JSON_FORMAT_SSE) |
1590 | fputs("data: ", f); | |
1591 | if (flags & JSON_FORMAT_SEQ) | |
1592 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1593 | ||
1594 | json_format(f, v, flags, prefix); | |
1595 | ||
1596 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1597 | fputc('\n', f); | |
1598 | if (flags & JSON_FORMAT_SSE) | |
1599 | fputc('\n', f); /* In case of SSE add a second newline */ | |
1600 | } | |
1601 | ||
1602 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { | |
1603 | JsonVariantType t; | |
1604 | JsonVariant *c; | |
1605 | JsonValue value; | |
1606 | const void *source; | |
1607 | size_t k; | |
1608 | ||
1609 | assert(nv); | |
1610 | assert(v); | |
1611 | ||
1612 | /* Let's copy the simple types literally, and the larger types by references */ | |
1613 | t = json_variant_type(v); | |
1614 | switch (t) { | |
1615 | case JSON_VARIANT_INTEGER: | |
1616 | k = sizeof(intmax_t); | |
1617 | value.integer = json_variant_integer(v); | |
1618 | source = &value; | |
1619 | break; | |
1620 | ||
1621 | case JSON_VARIANT_UNSIGNED: | |
1622 | k = sizeof(uintmax_t); | |
1623 | value.unsig = json_variant_unsigned(v); | |
1624 | source = &value; | |
1625 | break; | |
1626 | ||
1627 | case JSON_VARIANT_REAL: | |
1628 | k = sizeof(long double); | |
1629 | value.real = json_variant_real(v); | |
1630 | source = &value; | |
1631 | break; | |
1632 | ||
1633 | case JSON_VARIANT_BOOLEAN: | |
1634 | k = sizeof(bool); | |
1635 | value.boolean = json_variant_boolean(v); | |
1636 | source = &value; | |
1637 | break; | |
1638 | ||
1639 | case JSON_VARIANT_NULL: | |
1640 | k = 0; | |
1641 | source = NULL; | |
1642 | break; | |
1643 | ||
1644 | case JSON_VARIANT_STRING: | |
1645 | source = json_variant_string(v); | |
1646 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
1647 | if (k <= INLINE_STRING_MAX) { | |
1648 | k ++; | |
1649 | break; | |
1650 | } | |
1651 | ||
1652 | _fallthrough_; | |
1653 | ||
1654 | default: | |
1655 | /* Everything else copy by reference */ | |
1656 | ||
1657 | c = malloc0(offsetof(JsonVariant, reference) + sizeof(JsonVariant*)); | |
1658 | if (!c) | |
1659 | return -ENOMEM; | |
1660 | ||
1661 | c->n_ref = 1; | |
1662 | c->type = t; | |
1663 | c->is_reference = true; | |
1664 | c->reference = json_variant_ref(json_variant_normalize(v)); | |
1665 | ||
1666 | *nv = c; | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | c = malloc0(offsetof(JsonVariant, value) + k); | |
1671 | if (!c) | |
1672 | return -ENOMEM; | |
1673 | ||
1674 | c->n_ref = 1; | |
1675 | c->type = t; | |
1676 | ||
1677 | memcpy_safe(&c->value, source, k); | |
1678 | ||
1679 | *nv = c; | |
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | static bool json_single_ref(JsonVariant *v) { | |
1684 | ||
1685 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
1686 | ||
d520d519 | 1687 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1688 | return false; |
1689 | ||
1690 | if (v->is_embedded) | |
1691 | return json_single_ref(v->parent); | |
1692 | ||
1693 | assert(v->n_ref > 0); | |
1694 | return v->n_ref == 1; | |
1695 | } | |
1696 | ||
1697 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
1698 | JsonVariant *w; | |
1699 | int r; | |
1700 | ||
1701 | assert(v); | |
1702 | ||
1703 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
1704 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
1705 | ||
1706 | if (!*v) | |
1707 | return 0; | |
1708 | ||
1709 | if (source && line > source->max_line) | |
1710 | source->max_line = line; | |
1711 | if (source && column > source->max_column) | |
1712 | source->max_column = column; | |
1713 | ||
d520d519 | 1714 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
1715 | |
1716 | if (!source && line == 0 && column == 0) | |
1717 | return 0; | |
1718 | ||
1719 | } else { | |
1720 | if (json_source_equal((*v)->source, source) && | |
1721 | (*v)->line == line && | |
1722 | (*v)->column == column) | |
1723 | return 0; | |
1724 | ||
1725 | if (json_single_ref(*v)) { /* Sole reference? */ | |
1726 | json_source_unref((*v)->source); | |
1727 | (*v)->source = json_source_ref(source); | |
1728 | (*v)->line = line; | |
1729 | (*v)->column = column; | |
1730 | return 1; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | r = json_variant_copy(&w, *v); | |
1735 | if (r < 0) | |
1736 | return r; | |
1737 | ||
d520d519 | 1738 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
1739 | assert(!w->is_embedded); |
1740 | assert(w->n_ref == 1); | |
1741 | assert(!w->source); | |
1742 | ||
1743 | w->source = json_source_ref(source); | |
1744 | w->line = line; | |
1745 | w->column = column; | |
1746 | ||
1747 | json_variant_unref(*v); | |
1748 | *v = w; | |
1749 | ||
1750 | return 1; | |
1751 | } | |
1752 | ||
1753 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
1754 | assert(line); | |
1755 | assert(column); | |
1756 | assert(s || n == 0); | |
1757 | ||
1758 | while (n > 0) { | |
1759 | ||
1760 | if (*s == '\n') { | |
1761 | (*line)++; | |
1762 | *column = 1; | |
df7f9e0b | 1763 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
1764 | (*column)++; |
1765 | else { | |
1766 | int w; | |
1767 | ||
1768 | w = utf8_encoded_valid_unichar(s); | |
1769 | if (w < 0) /* count invalid unichars as normal characters */ | |
1770 | w = 1; | |
1771 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
1772 | w = (int) n; | |
1773 | ||
1774 | (*column)++; | |
1775 | ||
1776 | s += w; | |
1777 | n -= w; | |
1778 | continue; | |
1779 | } | |
1780 | ||
1781 | s++; | |
1782 | n--; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
1787 | int aa, bb, cc, dd; | |
1788 | uint16_t x; | |
1789 | ||
1790 | assert(c); | |
1791 | assert(ret); | |
1792 | ||
1793 | aa = unhexchar(c[0]); | |
1794 | if (aa < 0) | |
1795 | return -EINVAL; | |
1796 | ||
1797 | bb = unhexchar(c[1]); | |
1798 | if (bb < 0) | |
1799 | return -EINVAL; | |
1800 | ||
1801 | cc = unhexchar(c[2]); | |
1802 | if (cc < 0) | |
1803 | return -EINVAL; | |
1804 | ||
1805 | dd = unhexchar(c[3]); | |
1806 | if (dd < 0) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | x = ((uint16_t) aa << 12) | | |
1810 | ((uint16_t) bb << 8) | | |
1811 | ((uint16_t) cc << 4) | | |
1812 | ((uint16_t) dd); | |
1813 | ||
1814 | if (x <= 0) | |
1815 | return -EINVAL; | |
1816 | ||
1817 | *ret = x; | |
1818 | ||
1819 | return 0; | |
1820 | } | |
1821 | ||
1822 | static int json_parse_string(const char **p, char **ret) { | |
1823 | _cleanup_free_ char *s = NULL; | |
1824 | size_t n = 0, allocated = 0; | |
1825 | const char *c; | |
1826 | ||
1827 | assert(p); | |
1828 | assert(*p); | |
1829 | assert(ret); | |
1830 | ||
1831 | c = *p; | |
1832 | ||
1833 | if (*c != '"') | |
1834 | return -EINVAL; | |
1835 | ||
1836 | c++; | |
1837 | ||
1838 | for (;;) { | |
1839 | int len; | |
1840 | ||
1841 | /* Check for EOF */ | |
1842 | if (*c == 0) | |
1843 | return -EINVAL; | |
1844 | ||
1845 | /* Check for control characters 0x00..0x1f */ | |
1846 | if (*c > 0 && *c < ' ') | |
1847 | return -EINVAL; | |
1848 | ||
1849 | /* Check for control character 0x7f */ | |
1850 | if (*c == 0x7f) | |
1851 | return -EINVAL; | |
1852 | ||
1853 | if (*c == '"') { | |
1854 | if (!s) { | |
1855 | s = strdup(""); | |
1856 | if (!s) | |
1857 | return -ENOMEM; | |
1858 | } else | |
1859 | s[n] = 0; | |
1860 | ||
1861 | *p = c + 1; | |
1862 | ||
490c5a37 | 1863 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
1864 | return JSON_TOKEN_STRING; |
1865 | } | |
1866 | ||
1867 | if (*c == '\\') { | |
1868 | char ch = 0; | |
1869 | c++; | |
1870 | ||
1871 | if (*c == 0) | |
1872 | return -EINVAL; | |
1873 | ||
1874 | if (IN_SET(*c, '"', '\\', '/')) | |
1875 | ch = *c; | |
1876 | else if (*c == 'b') | |
1877 | ch = '\b'; | |
1878 | else if (*c == 'f') | |
1879 | ch = '\f'; | |
1880 | else if (*c == 'n') | |
1881 | ch = '\n'; | |
1882 | else if (*c == 'r') | |
1883 | ch = '\r'; | |
1884 | else if (*c == 't') | |
1885 | ch = '\t'; | |
1886 | else if (*c == 'u') { | |
1887 | char16_t x; | |
1888 | int r; | |
1889 | ||
1890 | r = unhex_ucs2(c + 1, &x); | |
1891 | if (r < 0) | |
1892 | return r; | |
1893 | ||
1894 | c += 5; | |
1895 | ||
1896 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
1897 | return -ENOMEM; | |
1898 | ||
1899 | if (!utf16_is_surrogate(x)) | |
1900 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
1901 | else if (utf16_is_trailing_surrogate(x)) | |
1902 | return -EINVAL; | |
1903 | else { | |
1904 | char16_t y; | |
1905 | ||
1906 | if (c[0] != '\\' || c[1] != 'u') | |
1907 | return -EINVAL; | |
1908 | ||
1909 | r = unhex_ucs2(c + 2, &y); | |
1910 | if (r < 0) | |
1911 | return r; | |
1912 | ||
1913 | c += 6; | |
1914 | ||
1915 | if (!utf16_is_trailing_surrogate(y)) | |
1916 | return -EINVAL; | |
1917 | ||
1918 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
1919 | } | |
1920 | ||
1921 | continue; | |
1922 | } else | |
1923 | return -EINVAL; | |
1924 | ||
1925 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
1926 | return -ENOMEM; | |
1927 | ||
1928 | s[n++] = ch; | |
1929 | c ++; | |
1930 | continue; | |
1931 | } | |
1932 | ||
1933 | len = utf8_encoded_valid_unichar(c); | |
1934 | if (len < 0) | |
1935 | return len; | |
1936 | ||
1937 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
1938 | return -ENOMEM; | |
1939 | ||
1940 | memcpy(s + n, c, len); | |
1941 | n += len; | |
1942 | c += len; | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | static int json_parse_number(const char **p, JsonValue *ret) { | |
1947 | bool negative = false, exponent_negative = false, is_real = false; | |
1948 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
1949 | intmax_t i = 0; | |
1950 | uintmax_t u = 0; | |
1951 | const char *c; | |
1952 | ||
1953 | assert(p); | |
1954 | assert(*p); | |
1955 | assert(ret); | |
1956 | ||
1957 | c = *p; | |
1958 | ||
1959 | if (*c == '-') { | |
1960 | negative = true; | |
1961 | c++; | |
1962 | } | |
1963 | ||
1964 | if (*c == '0') | |
1965 | c++; | |
1966 | else { | |
1967 | if (!strchr("123456789", *c) || *c == 0) | |
1968 | return -EINVAL; | |
1969 | ||
1970 | do { | |
1971 | if (!is_real) { | |
1972 | if (negative) { | |
1973 | ||
1974 | if (i < INTMAX_MIN / 10) /* overflow */ | |
1975 | is_real = true; | |
1976 | else { | |
1977 | intmax_t t = 10 * i; | |
1978 | ||
1979 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
1980 | is_real = true; | |
1981 | else | |
1982 | i = t - (*c - '0'); | |
1983 | } | |
1984 | } else { | |
1985 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
1986 | is_real = true; | |
1987 | else { | |
1988 | uintmax_t t = 10 * u; | |
1989 | ||
1990 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
1991 | is_real = true; | |
1992 | else | |
1993 | u = t + (*c - '0'); | |
1994 | } | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | x = 10.0 * x + (*c - '0'); | |
1999 | ||
2000 | c++; | |
2001 | } while (strchr("0123456789", *c) && *c != 0); | |
2002 | } | |
2003 | ||
2004 | if (*c == '.') { | |
2005 | is_real = true; | |
2006 | c++; | |
2007 | ||
2008 | if (!strchr("0123456789", *c) || *c == 0) | |
2009 | return -EINVAL; | |
2010 | ||
2011 | do { | |
2012 | y = 10.0 * y + (*c - '0'); | |
2013 | shift = 10.0 * shift; | |
2014 | c++; | |
2015 | } while (strchr("0123456789", *c) && *c != 0); | |
2016 | } | |
2017 | ||
490c5a37 | 2018 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2019 | is_real = true; |
2020 | c++; | |
2021 | ||
2022 | if (*c == '-') { | |
2023 | exponent_negative = true; | |
2024 | c++; | |
2025 | } else if (*c == '+') | |
2026 | c++; | |
2027 | ||
2028 | if (!strchr("0123456789", *c) || *c == 0) | |
2029 | return -EINVAL; | |
2030 | ||
2031 | do { | |
2032 | exponent = 10.0 * exponent + (*c - '0'); | |
2033 | c++; | |
2034 | } while (strchr("0123456789", *c) && *c != 0); | |
2035 | } | |
2036 | ||
2037 | *p = c; | |
2038 | ||
2039 | if (is_real) { | |
2040 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2041 | return JSON_TOKEN_REAL; | |
2042 | } else if (negative) { | |
2043 | ret->integer = i; | |
2044 | return JSON_TOKEN_INTEGER; | |
2045 | } else { | |
2046 | ret->unsig = u; | |
2047 | return JSON_TOKEN_UNSIGNED; | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | int json_tokenize( | |
2052 | const char **p, | |
2053 | char **ret_string, | |
2054 | JsonValue *ret_value, | |
2055 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2056 | unsigned *ret_column, | |
2057 | void **state, | |
2058 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2059 | unsigned *column) { | |
2060 | ||
2061 | unsigned start_line, start_column; | |
2062 | const char *start, *c; | |
2063 | size_t n; | |
2064 | int t, r; | |
2065 | ||
2066 | enum { | |
2067 | STATE_NULL, | |
2068 | STATE_VALUE, | |
2069 | STATE_VALUE_POST, | |
2070 | }; | |
2071 | ||
2072 | assert(p); | |
2073 | assert(*p); | |
2074 | assert(ret_string); | |
2075 | assert(ret_value); | |
2076 | assert(ret_line); | |
2077 | assert(ret_column); | |
2078 | assert(line); | |
2079 | assert(column); | |
2080 | assert(state); | |
2081 | ||
2082 | t = PTR_TO_INT(*state); | |
2083 | if (t == STATE_NULL) { | |
2084 | *line = 1; | |
2085 | *column = 1; | |
2086 | t = STATE_VALUE; | |
2087 | } | |
2088 | ||
2089 | /* Skip over the whitespace */ | |
2090 | n = strspn(*p, WHITESPACE); | |
2091 | inc_lines_columns(line, column, *p, n); | |
2092 | c = *p + n; | |
2093 | ||
2094 | /* Remember where we started processing this token */ | |
2095 | start = c; | |
2096 | start_line = *line; | |
2097 | start_column = *column; | |
2098 | ||
2099 | if (*c == 0) { | |
2100 | *ret_string = NULL; | |
2101 | *ret_value = JSON_VALUE_NULL; | |
2102 | r = JSON_TOKEN_END; | |
2103 | goto finish; | |
2104 | } | |
2105 | ||
2106 | switch (t) { | |
2107 | ||
2108 | case STATE_VALUE: | |
2109 | ||
2110 | if (*c == '{') { | |
2111 | c++; | |
2112 | *state = INT_TO_PTR(STATE_VALUE); | |
2113 | r = JSON_TOKEN_OBJECT_OPEN; | |
2114 | goto null_return; | |
2115 | ||
2116 | } else if (*c == '}') { | |
2117 | c++; | |
2118 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2119 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2120 | goto null_return; | |
2121 | ||
2122 | } else if (*c == '[') { | |
2123 | c++; | |
2124 | *state = INT_TO_PTR(STATE_VALUE); | |
2125 | r = JSON_TOKEN_ARRAY_OPEN; | |
2126 | goto null_return; | |
2127 | ||
2128 | } else if (*c == ']') { | |
2129 | c++; | |
2130 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2131 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2132 | goto null_return; | |
2133 | ||
2134 | } else if (*c == '"') { | |
2135 | ||
2136 | r = json_parse_string(&c, ret_string); | |
2137 | if (r < 0) | |
2138 | return r; | |
2139 | ||
2140 | *ret_value = JSON_VALUE_NULL; | |
2141 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2142 | goto finish; | |
2143 | ||
2144 | } else if (strchr("-0123456789", *c)) { | |
2145 | ||
2146 | r = json_parse_number(&c, ret_value); | |
2147 | if (r < 0) | |
2148 | return r; | |
2149 | ||
2150 | *ret_string = NULL; | |
2151 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2152 | goto finish; | |
2153 | ||
2154 | } else if (startswith(c, "true")) { | |
2155 | *ret_string = NULL; | |
2156 | ret_value->boolean = true; | |
2157 | c += 4; | |
2158 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2159 | r = JSON_TOKEN_BOOLEAN; | |
2160 | goto finish; | |
2161 | ||
2162 | } else if (startswith(c, "false")) { | |
2163 | *ret_string = NULL; | |
2164 | ret_value->boolean = false; | |
2165 | c += 5; | |
2166 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2167 | r = JSON_TOKEN_BOOLEAN; | |
2168 | goto finish; | |
2169 | ||
2170 | } else if (startswith(c, "null")) { | |
2171 | *ret_string = NULL; | |
2172 | *ret_value = JSON_VALUE_NULL; | |
2173 | c += 4; | |
2174 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2175 | r = JSON_TOKEN_NULL; | |
2176 | goto finish; | |
2177 | ||
2178 | } | |
2179 | ||
2180 | return -EINVAL; | |
2181 | ||
2182 | case STATE_VALUE_POST: | |
2183 | ||
2184 | if (*c == ':') { | |
2185 | c++; | |
2186 | *state = INT_TO_PTR(STATE_VALUE); | |
2187 | r = JSON_TOKEN_COLON; | |
2188 | goto null_return; | |
2189 | ||
2190 | } else if (*c == ',') { | |
2191 | c++; | |
2192 | *state = INT_TO_PTR(STATE_VALUE); | |
2193 | r = JSON_TOKEN_COMMA; | |
2194 | goto null_return; | |
2195 | ||
2196 | } else if (*c == '}') { | |
2197 | c++; | |
2198 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2199 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2200 | goto null_return; | |
2201 | ||
2202 | } else if (*c == ']') { | |
2203 | c++; | |
2204 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2205 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2206 | goto null_return; | |
2207 | } | |
2208 | ||
2209 | return -EINVAL; | |
2210 | ||
2211 | default: | |
2212 | assert_not_reached("Unexpected tokenizer state"); | |
2213 | } | |
2214 | ||
2215 | null_return: | |
2216 | *ret_string = NULL; | |
2217 | *ret_value = JSON_VALUE_NULL; | |
2218 | ||
2219 | finish: | |
2220 | inc_lines_columns(line, column, start, c - start); | |
2221 | *p = c; | |
2222 | ||
2223 | *ret_line = start_line; | |
2224 | *ret_column = start_column; | |
2225 | ||
2226 | return r; | |
2227 | } | |
2228 | ||
2229 | typedef enum JsonExpect { | |
2230 | /* The following values are used by json_parse() */ | |
2231 | EXPECT_TOPLEVEL, | |
2232 | EXPECT_END, | |
2233 | EXPECT_OBJECT_FIRST_KEY, | |
2234 | EXPECT_OBJECT_NEXT_KEY, | |
2235 | EXPECT_OBJECT_COLON, | |
2236 | EXPECT_OBJECT_VALUE, | |
2237 | EXPECT_OBJECT_COMMA, | |
2238 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2239 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2240 | EXPECT_ARRAY_COMMA, | |
2241 | ||
2242 | /* And these are used by json_build() */ | |
2243 | EXPECT_ARRAY_ELEMENT, | |
2244 | EXPECT_OBJECT_KEY, | |
2245 | } JsonExpect; | |
2246 | ||
2247 | typedef struct JsonStack { | |
2248 | JsonExpect expect; | |
2249 | JsonVariant **elements; | |
2250 | size_t n_elements, n_elements_allocated; | |
2251 | unsigned line_before; | |
2252 | unsigned column_before; | |
319a4f27 | 2253 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2254 | } JsonStack; |
2255 | ||
2256 | static void json_stack_release(JsonStack *s) { | |
2257 | assert(s); | |
2258 | ||
2259 | json_variant_unref_many(s->elements, s->n_elements); | |
2260 | s->elements = mfree(s->elements); | |
2261 | } | |
2262 | ||
2263 | static int json_parse_internal( | |
2264 | const char **input, | |
2265 | JsonSource *source, | |
2266 | JsonVariant **ret, | |
2267 | unsigned *line, | |
2268 | unsigned *column, | |
2269 | bool continue_end) { | |
2270 | ||
2271 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2272 | unsigned line_buffer = 0, column_buffer = 0; | |
2273 | void *tokenizer_state = NULL; | |
2274 | JsonStack *stack = NULL; | |
2275 | const char *p; | |
2276 | int r; | |
2277 | ||
2278 | assert_return(input, -EINVAL); | |
2279 | assert_return(ret, -EINVAL); | |
2280 | ||
2281 | p = *input; | |
2282 | ||
2283 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2284 | return -ENOMEM; | |
2285 | ||
2286 | stack[0] = (JsonStack) { | |
2287 | .expect = EXPECT_TOPLEVEL, | |
2288 | }; | |
2289 | ||
2290 | if (!line) | |
2291 | line = &line_buffer; | |
2292 | if (!column) | |
2293 | column = &column_buffer; | |
2294 | ||
2295 | for (;;) { | |
2296 | _cleanup_free_ char *string = NULL; | |
2297 | unsigned line_token, column_token; | |
2298 | JsonVariant *add = NULL; | |
2299 | JsonStack *current; | |
2300 | JsonValue value; | |
2301 | int token; | |
2302 | ||
2303 | assert(n_stack > 0); | |
2304 | current = stack + n_stack - 1; | |
2305 | ||
2306 | if (continue_end && current->expect == EXPECT_END) | |
2307 | goto done; | |
2308 | ||
2309 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2310 | if (token < 0) { | |
2311 | r = token; | |
2312 | goto finish; | |
2313 | } | |
2314 | ||
2315 | switch (token) { | |
2316 | ||
2317 | case JSON_TOKEN_END: | |
2318 | if (current->expect != EXPECT_END) { | |
2319 | r = -EINVAL; | |
2320 | goto finish; | |
2321 | } | |
2322 | ||
2323 | assert(current->n_elements == 1); | |
2324 | assert(n_stack == 1); | |
2325 | goto done; | |
2326 | ||
2327 | case JSON_TOKEN_COLON: | |
2328 | ||
2329 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2330 | r = -EINVAL; | |
2331 | goto finish; | |
2332 | } | |
2333 | ||
2334 | current->expect = EXPECT_OBJECT_VALUE; | |
2335 | break; | |
2336 | ||
2337 | case JSON_TOKEN_COMMA: | |
2338 | ||
2339 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2340 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2341 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2342 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2343 | else { | |
2344 | r = -EINVAL; | |
2345 | goto finish; | |
2346 | } | |
2347 | ||
2348 | break; | |
2349 | ||
2350 | case JSON_TOKEN_OBJECT_OPEN: | |
2351 | ||
2352 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2353 | r = -EINVAL; | |
2354 | goto finish; | |
2355 | } | |
2356 | ||
2357 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2358 | r = -ENOMEM; | |
2359 | goto finish; | |
2360 | } | |
2361 | current = stack + n_stack - 1; | |
2362 | ||
2363 | /* Prepare the expect for when we return from the child */ | |
2364 | if (current->expect == EXPECT_TOPLEVEL) | |
2365 | current->expect = EXPECT_END; | |
2366 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2367 | current->expect = EXPECT_OBJECT_COMMA; | |
2368 | else { | |
2369 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2370 | current->expect = EXPECT_ARRAY_COMMA; | |
2371 | } | |
2372 | ||
2373 | stack[n_stack++] = (JsonStack) { | |
2374 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2375 | .line_before = line_token, | |
2376 | .column_before = column_token, | |
2377 | }; | |
2378 | ||
2379 | current = stack + n_stack - 1; | |
2380 | break; | |
2381 | ||
2382 | case JSON_TOKEN_OBJECT_CLOSE: | |
2383 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2384 | r = -EINVAL; | |
2385 | goto finish; | |
2386 | } | |
2387 | ||
2388 | assert(n_stack > 1); | |
2389 | ||
2390 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2391 | if (r < 0) | |
2392 | goto finish; | |
2393 | ||
2394 | line_token = current->line_before; | |
2395 | column_token = current->column_before; | |
2396 | ||
2397 | json_stack_release(current); | |
2398 | n_stack--, current--; | |
2399 | ||
2400 | break; | |
2401 | ||
2402 | case JSON_TOKEN_ARRAY_OPEN: | |
2403 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2404 | r = -EINVAL; | |
2405 | goto finish; | |
2406 | } | |
2407 | ||
2408 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2409 | r = -ENOMEM; | |
2410 | goto finish; | |
2411 | } | |
2412 | current = stack + n_stack - 1; | |
2413 | ||
2414 | /* Prepare the expect for when we return from the child */ | |
2415 | if (current->expect == EXPECT_TOPLEVEL) | |
2416 | current->expect = EXPECT_END; | |
2417 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2418 | current->expect = EXPECT_OBJECT_COMMA; | |
2419 | else { | |
2420 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2421 | current->expect = EXPECT_ARRAY_COMMA; | |
2422 | } | |
2423 | ||
2424 | stack[n_stack++] = (JsonStack) { | |
2425 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2426 | .line_before = line_token, | |
2427 | .column_before = column_token, | |
2428 | }; | |
2429 | ||
2430 | break; | |
2431 | ||
2432 | case JSON_TOKEN_ARRAY_CLOSE: | |
2433 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2434 | r = -EINVAL; | |
2435 | goto finish; | |
2436 | } | |
2437 | ||
2438 | assert(n_stack > 1); | |
2439 | ||
2440 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2441 | if (r < 0) | |
2442 | goto finish; | |
2443 | ||
2444 | line_token = current->line_before; | |
2445 | column_token = current->column_before; | |
2446 | ||
2447 | json_stack_release(current); | |
2448 | n_stack--, current--; | |
2449 | break; | |
2450 | ||
2451 | case JSON_TOKEN_STRING: | |
2452 | 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)) { | |
2453 | r = -EINVAL; | |
2454 | goto finish; | |
2455 | } | |
2456 | ||
2457 | r = json_variant_new_string(&add, string); | |
2458 | if (r < 0) | |
2459 | goto finish; | |
2460 | ||
2461 | if (current->expect == EXPECT_TOPLEVEL) | |
2462 | current->expect = EXPECT_END; | |
2463 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
2464 | current->expect = EXPECT_OBJECT_COLON; | |
2465 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2466 | current->expect = EXPECT_OBJECT_COMMA; | |
2467 | else { | |
2468 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2469 | current->expect = EXPECT_ARRAY_COMMA; | |
2470 | } | |
2471 | ||
2472 | break; | |
2473 | ||
2474 | case JSON_TOKEN_REAL: | |
2475 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2476 | r = -EINVAL; | |
2477 | goto finish; | |
2478 | } | |
2479 | ||
2480 | r = json_variant_new_real(&add, value.real); | |
2481 | if (r < 0) | |
2482 | goto finish; | |
2483 | ||
2484 | if (current->expect == EXPECT_TOPLEVEL) | |
2485 | current->expect = EXPECT_END; | |
2486 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2487 | current->expect = EXPECT_OBJECT_COMMA; | |
2488 | else { | |
2489 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2490 | current->expect = EXPECT_ARRAY_COMMA; | |
2491 | } | |
2492 | ||
2493 | break; | |
2494 | ||
2495 | case JSON_TOKEN_INTEGER: | |
2496 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2497 | r = -EINVAL; | |
2498 | goto finish; | |
2499 | } | |
2500 | ||
2501 | r = json_variant_new_integer(&add, value.integer); | |
2502 | if (r < 0) | |
2503 | goto finish; | |
2504 | ||
2505 | if (current->expect == EXPECT_TOPLEVEL) | |
2506 | current->expect = EXPECT_END; | |
2507 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2508 | current->expect = EXPECT_OBJECT_COMMA; | |
2509 | else { | |
2510 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2511 | current->expect = EXPECT_ARRAY_COMMA; | |
2512 | } | |
2513 | ||
2514 | break; | |
2515 | ||
2516 | case JSON_TOKEN_UNSIGNED: | |
2517 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2518 | r = -EINVAL; | |
2519 | goto finish; | |
2520 | } | |
2521 | ||
2522 | r = json_variant_new_unsigned(&add, value.unsig); | |
2523 | if (r < 0) | |
2524 | goto finish; | |
2525 | ||
2526 | if (current->expect == EXPECT_TOPLEVEL) | |
2527 | current->expect = EXPECT_END; | |
2528 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2529 | current->expect = EXPECT_OBJECT_COMMA; | |
2530 | else { | |
2531 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2532 | current->expect = EXPECT_ARRAY_COMMA; | |
2533 | } | |
2534 | ||
2535 | break; | |
2536 | ||
2537 | case JSON_TOKEN_BOOLEAN: | |
2538 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2539 | r = -EINVAL; | |
2540 | goto finish; | |
2541 | } | |
2542 | ||
2543 | r = json_variant_new_boolean(&add, value.boolean); | |
2544 | if (r < 0) | |
2545 | goto finish; | |
2546 | ||
2547 | if (current->expect == EXPECT_TOPLEVEL) | |
2548 | current->expect = EXPECT_END; | |
2549 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2550 | current->expect = EXPECT_OBJECT_COMMA; | |
2551 | else { | |
2552 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2553 | current->expect = EXPECT_ARRAY_COMMA; | |
2554 | } | |
2555 | ||
2556 | break; | |
2557 | ||
2558 | case JSON_TOKEN_NULL: | |
2559 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2560 | r = -EINVAL; | |
2561 | goto finish; | |
2562 | } | |
2563 | ||
2564 | r = json_variant_new_null(&add); | |
2565 | if (r < 0) | |
2566 | goto finish; | |
2567 | ||
2568 | if (current->expect == EXPECT_TOPLEVEL) | |
2569 | current->expect = EXPECT_END; | |
2570 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2571 | current->expect = EXPECT_OBJECT_COMMA; | |
2572 | else { | |
2573 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2574 | current->expect = EXPECT_ARRAY_COMMA; | |
2575 | } | |
2576 | ||
2577 | break; | |
2578 | ||
2579 | default: | |
2580 | assert_not_reached("Unexpected token"); | |
2581 | } | |
2582 | ||
2583 | if (add) { | |
2584 | (void) json_variant_set_source(&add, source, line_token, column_token); | |
2585 | ||
2586 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
2587 | r = -ENOMEM; | |
2588 | goto finish; | |
2589 | } | |
2590 | ||
2591 | current->elements[current->n_elements++] = add; | |
2592 | } | |
2593 | } | |
2594 | ||
2595 | done: | |
2596 | assert(n_stack == 1); | |
2597 | assert(stack[0].n_elements == 1); | |
2598 | ||
2599 | *ret = json_variant_ref(stack[0].elements[0]); | |
2600 | *input = p; | |
2601 | r = 0; | |
2602 | ||
2603 | finish: | |
2604 | for (i = 0; i < n_stack; i++) | |
2605 | json_stack_release(stack + i); | |
2606 | ||
2607 | free(stack); | |
2608 | ||
2609 | return r; | |
2610 | } | |
2611 | ||
2612 | int json_parse(const char *input, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2613 | return json_parse_internal(&input, NULL, ret, ret_line, ret_column, false); | |
2614 | } | |
2615 | ||
2616 | int json_parse_continue(const char **p, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2617 | return json_parse_internal(p, NULL, ret, ret_line, ret_column, true); | |
2618 | } | |
2619 | ||
2620 | int json_parse_file(FILE *f, const char *path, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2621 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; | |
2622 | _cleanup_free_ char *text = NULL; | |
2623 | const char *p; | |
2624 | int r; | |
2625 | ||
2626 | if (f) | |
2627 | r = read_full_stream(f, &text, NULL); | |
2628 | else if (path) | |
2629 | r = read_full_file(path, &text, NULL); | |
2630 | else | |
2631 | return -EINVAL; | |
2632 | if (r < 0) | |
2633 | return r; | |
2634 | ||
2635 | if (path) { | |
2636 | source = json_source_new(path); | |
2637 | if (!source) | |
2638 | return -ENOMEM; | |
2639 | } | |
2640 | ||
2641 | p = text; | |
2642 | return json_parse_internal(&p, source, ret, ret_line, ret_column, false); | |
2643 | } | |
2644 | ||
2645 | int json_buildv(JsonVariant **ret, va_list ap) { | |
2646 | JsonStack *stack = NULL; | |
2647 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2648 | int r; | |
2649 | ||
2650 | assert_return(ret, -EINVAL); | |
2651 | ||
2652 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2653 | return -ENOMEM; | |
2654 | ||
2655 | stack[0] = (JsonStack) { | |
2656 | .expect = EXPECT_TOPLEVEL, | |
2657 | }; | |
2658 | ||
2659 | for (;;) { | |
fcadf032 | 2660 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
2661 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
2662 | * have been added to the current variant */ | |
cd0b6c53 LP |
2663 | JsonStack *current; |
2664 | int command; | |
2665 | ||
2666 | assert(n_stack > 0); | |
2667 | current = stack + n_stack - 1; | |
2668 | ||
2669 | if (current->expect == EXPECT_END) | |
2670 | goto done; | |
2671 | ||
2672 | command = va_arg(ap, int); | |
2673 | ||
2674 | switch (command) { | |
2675 | ||
2676 | case _JSON_BUILD_STRING: { | |
2677 | const char *p; | |
2678 | ||
2679 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2680 | r = -EINVAL; | |
2681 | goto finish; | |
2682 | } | |
2683 | ||
2684 | p = va_arg(ap, const char *); | |
2685 | ||
319a4f27 LP |
2686 | if (current->n_suppress == 0) { |
2687 | r = json_variant_new_string(&add, p); | |
2688 | if (r < 0) | |
2689 | goto finish; | |
2690 | } | |
2691 | ||
2692 | n_subtract = 1; | |
cd0b6c53 LP |
2693 | |
2694 | if (current->expect == EXPECT_TOPLEVEL) | |
2695 | current->expect = EXPECT_END; | |
2696 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2697 | current->expect = EXPECT_OBJECT_KEY; | |
2698 | else | |
2699 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2700 | ||
2701 | break; | |
2702 | } | |
2703 | ||
2704 | case _JSON_BUILD_INTEGER: { | |
2705 | intmax_t j; | |
2706 | ||
2707 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2708 | r = -EINVAL; | |
2709 | goto finish; | |
2710 | } | |
2711 | ||
2712 | j = va_arg(ap, intmax_t); | |
2713 | ||
319a4f27 LP |
2714 | if (current->n_suppress == 0) { |
2715 | r = json_variant_new_integer(&add, j); | |
2716 | if (r < 0) | |
2717 | goto finish; | |
2718 | } | |
2719 | ||
2720 | n_subtract = 1; | |
cd0b6c53 LP |
2721 | |
2722 | if (current->expect == EXPECT_TOPLEVEL) | |
2723 | current->expect = EXPECT_END; | |
2724 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2725 | current->expect = EXPECT_OBJECT_KEY; | |
2726 | else | |
2727 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2728 | ||
2729 | break; | |
2730 | } | |
2731 | ||
2732 | case _JSON_BUILD_UNSIGNED: { | |
2733 | uintmax_t j; | |
2734 | ||
2735 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2736 | r = -EINVAL; | |
2737 | goto finish; | |
2738 | } | |
2739 | ||
2740 | j = va_arg(ap, uintmax_t); | |
2741 | ||
319a4f27 LP |
2742 | if (current->n_suppress == 0) { |
2743 | r = json_variant_new_unsigned(&add, j); | |
2744 | if (r < 0) | |
2745 | goto finish; | |
2746 | } | |
2747 | ||
2748 | n_subtract = 1; | |
cd0b6c53 LP |
2749 | |
2750 | if (current->expect == EXPECT_TOPLEVEL) | |
2751 | current->expect = EXPECT_END; | |
2752 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2753 | current->expect = EXPECT_OBJECT_KEY; | |
2754 | else | |
2755 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2756 | ||
2757 | break; | |
2758 | } | |
2759 | ||
2760 | case _JSON_BUILD_REAL: { | |
2761 | long double d; | |
2762 | ||
2763 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2764 | r = -EINVAL; | |
2765 | goto finish; | |
2766 | } | |
2767 | ||
2768 | d = va_arg(ap, long double); | |
2769 | ||
319a4f27 LP |
2770 | if (current->n_suppress == 0) { |
2771 | r = json_variant_new_real(&add, d); | |
2772 | if (r < 0) | |
2773 | goto finish; | |
2774 | } | |
2775 | ||
2776 | n_subtract = 1; | |
cd0b6c53 LP |
2777 | |
2778 | if (current->expect == EXPECT_TOPLEVEL) | |
2779 | current->expect = EXPECT_END; | |
2780 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2781 | current->expect = EXPECT_OBJECT_KEY; | |
2782 | else | |
2783 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2784 | ||
2785 | break; | |
2786 | } | |
2787 | ||
2788 | case _JSON_BUILD_BOOLEAN: { | |
2789 | bool b; | |
2790 | ||
2791 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2792 | r = -EINVAL; | |
2793 | goto finish; | |
2794 | } | |
2795 | ||
2796 | b = va_arg(ap, int); | |
2797 | ||
319a4f27 LP |
2798 | if (current->n_suppress == 0) { |
2799 | r = json_variant_new_boolean(&add, b); | |
2800 | if (r < 0) | |
2801 | goto finish; | |
2802 | } | |
2803 | ||
2804 | n_subtract = 1; | |
cd0b6c53 LP |
2805 | |
2806 | if (current->expect == EXPECT_TOPLEVEL) | |
2807 | current->expect = EXPECT_END; | |
2808 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2809 | current->expect = EXPECT_OBJECT_KEY; | |
2810 | else | |
2811 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2812 | ||
2813 | break; | |
2814 | } | |
2815 | ||
2816 | case _JSON_BUILD_NULL: | |
2817 | ||
2818 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2819 | r = -EINVAL; | |
2820 | goto finish; | |
2821 | } | |
2822 | ||
319a4f27 LP |
2823 | if (current->n_suppress == 0) { |
2824 | r = json_variant_new_null(&add); | |
2825 | if (r < 0) | |
2826 | goto finish; | |
2827 | } | |
2828 | ||
2829 | n_subtract = 1; | |
cd0b6c53 LP |
2830 | |
2831 | if (current->expect == EXPECT_TOPLEVEL) | |
2832 | current->expect = EXPECT_END; | |
2833 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2834 | current->expect = EXPECT_OBJECT_KEY; | |
2835 | else | |
2836 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2837 | ||
2838 | break; | |
2839 | ||
2840 | case _JSON_BUILD_VARIANT: | |
2841 | ||
2842 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2843 | r = -EINVAL; | |
2844 | goto finish; | |
2845 | } | |
2846 | ||
319a4f27 LP |
2847 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
2848 | * allocated anyway... */ | |
cd0b6c53 LP |
2849 | add = va_arg(ap, JsonVariant*); |
2850 | if (!add) | |
2851 | add = JSON_VARIANT_MAGIC_NULL; | |
2852 | else | |
2853 | json_variant_ref(add); | |
2854 | ||
319a4f27 LP |
2855 | n_subtract = 1; |
2856 | ||
cd0b6c53 LP |
2857 | if (current->expect == EXPECT_TOPLEVEL) |
2858 | current->expect = EXPECT_END; | |
2859 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2860 | current->expect = EXPECT_OBJECT_KEY; | |
2861 | else | |
2862 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2863 | ||
2864 | break; | |
2865 | ||
2866 | case _JSON_BUILD_LITERAL: { | |
2867 | const char *l; | |
2868 | ||
2869 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2870 | r = -EINVAL; | |
2871 | goto finish; | |
2872 | } | |
2873 | ||
2874 | l = va_arg(ap, const char *); | |
2875 | ||
319a4f27 LP |
2876 | if (l) { |
2877 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
2878 | * errors even in suppressed object properties */ | |
2879 | ||
cd0b6c53 LP |
2880 | r = json_parse(l, &add, NULL, NULL); |
2881 | if (r < 0) | |
2882 | goto finish; | |
319a4f27 LP |
2883 | } else |
2884 | add = JSON_VARIANT_MAGIC_NULL; | |
2885 | ||
2886 | n_subtract = 1; | |
cd0b6c53 LP |
2887 | |
2888 | if (current->expect == EXPECT_TOPLEVEL) | |
2889 | current->expect = EXPECT_END; | |
2890 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2891 | current->expect = EXPECT_OBJECT_KEY; | |
2892 | else | |
2893 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2894 | ||
2895 | break; | |
2896 | } | |
2897 | ||
2898 | case _JSON_BUILD_ARRAY_BEGIN: | |
2899 | ||
2900 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2901 | r = -EINVAL; | |
2902 | goto finish; | |
2903 | } | |
2904 | ||
2905 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2906 | r = -ENOMEM; | |
2907 | goto finish; | |
2908 | } | |
2909 | current = stack + n_stack - 1; | |
2910 | ||
2911 | if (current->expect == EXPECT_TOPLEVEL) | |
2912 | current->expect = EXPECT_END; | |
2913 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2914 | current->expect = EXPECT_OBJECT_KEY; | |
2915 | else | |
2916 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2917 | ||
2918 | stack[n_stack++] = (JsonStack) { | |
2919 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
2920 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
2921 | * new array, then we should | |
2922 | * also suppress all array | |
2923 | * members */ | |
cd0b6c53 LP |
2924 | }; |
2925 | ||
2926 | break; | |
2927 | ||
2928 | case _JSON_BUILD_ARRAY_END: | |
2929 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
2930 | r = -EINVAL; | |
2931 | goto finish; | |
2932 | } | |
2933 | ||
2934 | assert(n_stack > 1); | |
2935 | ||
319a4f27 LP |
2936 | if (current->n_suppress == 0) { |
2937 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2938 | if (r < 0) | |
2939 | goto finish; | |
2940 | } | |
2941 | ||
2942 | n_subtract = 1; | |
cd0b6c53 LP |
2943 | |
2944 | json_stack_release(current); | |
2945 | n_stack--, current--; | |
2946 | ||
2947 | break; | |
2948 | ||
2949 | case _JSON_BUILD_STRV: { | |
2950 | char **l; | |
2951 | ||
2952 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2953 | r = -EINVAL; | |
2954 | goto finish; | |
2955 | } | |
2956 | ||
2957 | l = va_arg(ap, char **); | |
2958 | ||
319a4f27 LP |
2959 | if (current->n_suppress == 0) { |
2960 | r = json_variant_new_array_strv(&add, l); | |
2961 | if (r < 0) | |
2962 | goto finish; | |
2963 | } | |
2964 | ||
2965 | n_subtract = 1; | |
cd0b6c53 LP |
2966 | |
2967 | if (current->expect == EXPECT_TOPLEVEL) | |
2968 | current->expect = EXPECT_END; | |
2969 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2970 | current->expect = EXPECT_OBJECT_KEY; | |
2971 | else | |
2972 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2973 | ||
2974 | break; | |
2975 | } | |
2976 | ||
2977 | case _JSON_BUILD_OBJECT_BEGIN: | |
2978 | ||
2979 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2980 | r = -EINVAL; | |
2981 | goto finish; | |
2982 | } | |
2983 | ||
2984 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2985 | r = -ENOMEM; | |
2986 | goto finish; | |
2987 | } | |
2988 | current = stack + n_stack - 1; | |
2989 | ||
2990 | if (current->expect == EXPECT_TOPLEVEL) | |
2991 | current->expect = EXPECT_END; | |
2992 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2993 | current->expect = EXPECT_OBJECT_KEY; | |
2994 | else | |
2995 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2996 | ||
2997 | stack[n_stack++] = (JsonStack) { | |
2998 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
2999 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3000 | * new object, then we should | |
3001 | * also suppress all object | |
3002 | * members */ | |
cd0b6c53 LP |
3003 | }; |
3004 | ||
3005 | break; | |
3006 | ||
3007 | case _JSON_BUILD_OBJECT_END: | |
3008 | ||
3009 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3010 | r = -EINVAL; | |
3011 | goto finish; | |
3012 | } | |
3013 | ||
3014 | assert(n_stack > 1); | |
3015 | ||
319a4f27 LP |
3016 | if (current->n_suppress == 0) { |
3017 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3018 | if (r < 0) | |
3019 | goto finish; | |
3020 | } | |
3021 | ||
3022 | n_subtract = 1; | |
cd0b6c53 LP |
3023 | |
3024 | json_stack_release(current); | |
3025 | n_stack--, current--; | |
3026 | ||
3027 | break; | |
3028 | ||
3029 | case _JSON_BUILD_PAIR: { | |
3030 | const char *n; | |
3031 | ||
3032 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3033 | r = -EINVAL; | |
3034 | goto finish; | |
3035 | } | |
3036 | ||
3037 | n = va_arg(ap, const char *); | |
3038 | ||
319a4f27 LP |
3039 | if (current->n_suppress == 0) { |
3040 | r = json_variant_new_string(&add, n); | |
3041 | if (r < 0) | |
3042 | goto finish; | |
3043 | } | |
3044 | ||
3045 | n_subtract = 1; | |
3046 | ||
3047 | current->expect = EXPECT_OBJECT_VALUE; | |
3048 | break; | |
3049 | } | |
3050 | ||
3051 | case _JSON_BUILD_PAIR_CONDITION: { | |
3052 | const char *n; | |
3053 | bool b; | |
3054 | ||
3055 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3056 | r = -EINVAL; | |
cd0b6c53 | 3057 | goto finish; |
319a4f27 LP |
3058 | } |
3059 | ||
3060 | b = va_arg(ap, int); | |
3061 | n = va_arg(ap, const char *); | |
3062 | ||
3063 | if (b && current->n_suppress == 0) { | |
3064 | r = json_variant_new_string(&add, n); | |
3065 | if (r < 0) | |
3066 | goto finish; | |
3067 | } | |
3068 | ||
3069 | n_subtract = 1; /* we generated one item */ | |
3070 | ||
3071 | if (!b && current->n_suppress != (size_t) -1) | |
3072 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3073 | |
3074 | current->expect = EXPECT_OBJECT_VALUE; | |
3075 | break; | |
3076 | }} | |
3077 | ||
319a4f27 LP |
3078 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3079 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3080 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3081 | r = -ENOMEM; | |
3082 | goto finish; | |
3083 | } | |
3084 | ||
fcadf032 | 3085 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3086 | } |
319a4f27 LP |
3087 | |
3088 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3089 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3090 | * on this stack level */ | |
3091 | if (current->n_suppress != (size_t) -1) { | |
3092 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3093 | current->n_suppress = 0; | |
3094 | else | |
3095 | current->n_suppress -= n_subtract; | |
3096 | } | |
cd0b6c53 LP |
3097 | } |
3098 | ||
3099 | done: | |
3100 | assert(n_stack == 1); | |
3101 | assert(stack[0].n_elements == 1); | |
3102 | ||
3103 | *ret = json_variant_ref(stack[0].elements[0]); | |
3104 | r = 0; | |
3105 | ||
3106 | finish: | |
3107 | for (i = 0; i < n_stack; i++) | |
3108 | json_stack_release(stack + i); | |
3109 | ||
3110 | free(stack); | |
3111 | ||
3112 | va_end(ap); | |
3113 | ||
3114 | return r; | |
3115 | } | |
3116 | ||
3117 | int json_build(JsonVariant **ret, ...) { | |
3118 | va_list ap; | |
3119 | int r; | |
3120 | ||
3121 | va_start(ap, ret); | |
3122 | r = json_buildv(ret, ap); | |
3123 | va_end(ap); | |
3124 | ||
3125 | return r; | |
3126 | } | |
3127 | ||
3128 | int json_log_internal( | |
3129 | JsonVariant *variant, | |
3130 | int level, | |
3131 | int error, | |
3132 | const char *file, | |
3133 | int line, | |
3134 | const char *func, | |
3135 | const char *format, ...) { | |
3136 | ||
3137 | PROTECT_ERRNO; | |
3138 | ||
3139 | unsigned source_line, source_column; | |
3140 | char buffer[LINE_MAX]; | |
3141 | const char *source; | |
3142 | va_list ap; | |
3143 | int r; | |
3144 | ||
fc0f6fbf | 3145 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3146 | |
3147 | va_start(ap, format); | |
3148 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3149 | va_end(ap); | |
3150 | ||
3151 | if (variant) { | |
3152 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3153 | if (r < 0) | |
3154 | return r; | |
3155 | } else { | |
3156 | source = NULL; | |
3157 | source_line = 0; | |
3158 | source_column = 0; | |
3159 | } | |
3160 | ||
3161 | if (source && source_line > 0 && source_column > 0) | |
3162 | return log_struct_internal( | |
3163 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3164 | error, | |
3165 | file, line, func, | |
3166 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3167 | "CONFIG_FILE=%s", source, | |
3168 | "CONFIG_LINE=%u", source_line, | |
3169 | "CONFIG_COLUMN=%u", source_column, | |
3170 | LOG_MESSAGE("%s:%u: %s", source, line, buffer), | |
3171 | NULL); | |
3172 | else | |
3173 | return log_struct_internal( | |
3174 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3175 | error, | |
3176 | file, line, func, | |
3177 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3178 | LOG_MESSAGE("%s", buffer), | |
3179 | NULL); | |
3180 | } | |
3181 | ||
3182 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3183 | const JsonDispatch *p; | |
3184 | size_t i, n, m; | |
3185 | int r, done = 0; | |
3186 | bool *found; | |
3187 | ||
3188 | if (!json_variant_is_object(v)) { | |
3189 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3190 | ||
3191 | if (flags & JSON_PERMISSIVE) | |
3192 | return 0; | |
3193 | ||
3194 | return -EINVAL; | |
3195 | } | |
3196 | ||
3197 | for (p = table, m = 0; p->name; p++) | |
3198 | m++; | |
3199 | ||
3200 | found = newa0(bool, m); | |
3201 | ||
3202 | n = json_variant_elements(v); | |
3203 | for (i = 0; i < n; i += 2) { | |
3204 | JsonVariant *key, *value; | |
3205 | ||
3206 | assert_se(key = json_variant_by_index(v, i)); | |
3207 | assert_se(value = json_variant_by_index(v, i+1)); | |
3208 | ||
3209 | for (p = table; p->name; p++) | |
3210 | if (p->name == (const char*) -1 || | |
3211 | streq_ptr(json_variant_string(key), p->name)) | |
3212 | break; | |
3213 | ||
3214 | if (p->name) { /* Found a matching entry! :-) */ | |
3215 | JsonDispatchFlags merged_flags; | |
3216 | ||
3217 | merged_flags = flags | p->flags; | |
3218 | ||
3219 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3220 | !json_variant_has_type(value, p->type)) { | |
3221 | ||
3222 | json_log(value, merged_flags, 0, | |
3223 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3224 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3225 | ||
3226 | if (merged_flags & JSON_PERMISSIVE) | |
3227 | continue; | |
3228 | ||
3229 | return -EINVAL; | |
3230 | } | |
3231 | ||
3232 | if (found[p-table]) { | |
3233 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3234 | ||
3235 | if (merged_flags & JSON_PERMISSIVE) | |
3236 | continue; | |
3237 | ||
3238 | return -ENOTUNIQ; | |
3239 | } | |
3240 | ||
3241 | found[p-table] = true; | |
3242 | ||
3243 | if (p->callback) { | |
3244 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3245 | if (r < 0) { | |
3246 | if (merged_flags & JSON_PERMISSIVE) | |
3247 | continue; | |
3248 | ||
3249 | return r; | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | done ++; | |
3254 | ||
3255 | } else { /* Didn't find a matching entry! :-( */ | |
3256 | ||
3257 | if (bad) { | |
3258 | r = bad(json_variant_string(key), value, flags, userdata); | |
3259 | if (r < 0) { | |
3260 | if (flags & JSON_PERMISSIVE) | |
3261 | continue; | |
3262 | ||
3263 | return r; | |
3264 | } else | |
3265 | done ++; | |
3266 | ||
3267 | } else { | |
3268 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3269 | ||
3270 | if (flags & JSON_PERMISSIVE) | |
3271 | continue; | |
3272 | ||
3273 | return -EADDRNOTAVAIL; | |
3274 | } | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | for (p = table; p->name; p++) { | |
3279 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3280 | ||
3281 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3282 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3283 | ||
3284 | if ((merged_flags & JSON_PERMISSIVE)) | |
3285 | continue; | |
3286 | ||
3287 | return -ENXIO; | |
3288 | } | |
3289 | } | |
3290 | ||
3291 | return done; | |
3292 | } | |
3293 | ||
3294 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3295 | bool *b = userdata; | |
3296 | ||
3297 | assert(variant); | |
3298 | assert(b); | |
3299 | ||
3300 | if (!json_variant_is_boolean(variant)) { | |
3301 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3302 | return -EINVAL; | |
3303 | } | |
3304 | ||
3305 | *b = json_variant_boolean(variant); | |
3306 | return 0; | |
3307 | } | |
3308 | ||
3309 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3310 | int *b = userdata; | |
3311 | ||
3312 | assert(variant); | |
3313 | assert(b); | |
3314 | ||
3315 | if (!json_variant_is_boolean(variant)) { | |
3316 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3317 | return -EINVAL; | |
3318 | } | |
3319 | ||
3320 | *b = json_variant_boolean(variant); | |
3321 | return 0; | |
3322 | } | |
3323 | ||
3324 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3325 | intmax_t *i = userdata; | |
3326 | ||
3327 | assert(variant); | |
3328 | assert(i); | |
3329 | ||
3330 | if (!json_variant_is_integer(variant)) { | |
3331 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3332 | return -EINVAL; | |
3333 | } | |
3334 | ||
3335 | *i = json_variant_integer(variant); | |
3336 | return 0; | |
3337 | } | |
3338 | ||
3339 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3340 | uintmax_t *u = userdata; | |
3341 | ||
3342 | assert(variant); | |
3343 | assert(u); | |
3344 | ||
3345 | if (!json_variant_is_unsigned(variant)) { | |
3346 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3347 | return -EINVAL; | |
3348 | } | |
3349 | ||
3350 | *u = json_variant_unsigned(variant); | |
3351 | return 0; | |
3352 | } | |
3353 | ||
3354 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3355 | uint32_t *u = userdata; | |
3356 | ||
3357 | assert(variant); | |
3358 | assert(u); | |
3359 | ||
3360 | if (!json_variant_is_unsigned(variant)) { | |
3361 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3362 | return -EINVAL; | |
3363 | } | |
3364 | ||
3365 | if (json_variant_unsigned(variant) > UINT32_MAX) { | |
3366 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3367 | return -ERANGE; | |
3368 | } | |
3369 | ||
3370 | *u = (uint32_t) json_variant_unsigned(variant); | |
3371 | return 0; | |
3372 | } | |
3373 | ||
3374 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3375 | int32_t *i = userdata; | |
3376 | ||
3377 | assert(variant); | |
3378 | assert(i); | |
3379 | ||
3380 | if (!json_variant_is_integer(variant)) { | |
3381 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3382 | return -EINVAL; | |
3383 | } | |
3384 | ||
3385 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) { | |
3386 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3387 | return -ERANGE; | |
3388 | } | |
3389 | ||
3390 | *i = (int32_t) json_variant_integer(variant); | |
3391 | return 0; | |
3392 | } | |
3393 | ||
3394 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3395 | char **s = userdata; | |
3396 | int r; | |
3397 | ||
3398 | assert(variant); | |
3399 | assert(s); | |
3400 | ||
3401 | if (json_variant_is_null(variant)) { | |
3402 | *s = mfree(*s); | |
3403 | return 0; | |
3404 | } | |
3405 | ||
3406 | if (!json_variant_is_string(variant)) { | |
3407 | json_log(variant, flags, 0, "JSON field '%s' is not a string.", strna(name)); | |
3408 | return -EINVAL; | |
3409 | } | |
3410 | ||
3411 | r = free_and_strdup(s, json_variant_string(variant)); | |
3412 | if (r < 0) | |
3413 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
3414 | ||
3415 | return 0; | |
3416 | } | |
3417 | ||
3418 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3419 | _cleanup_strv_free_ char **l = NULL; | |
3420 | char ***s = userdata; | |
3421 | size_t i; | |
3422 | int r; | |
3423 | ||
3424 | assert(variant); | |
3425 | assert(s); | |
3426 | ||
3427 | if (json_variant_is_null(variant)) { | |
3428 | *s = strv_free(*s); | |
3429 | return 0; | |
3430 | } | |
3431 | ||
3432 | if (!json_variant_is_array(variant)) { | |
3433 | json_log(variant, 0, flags, "JSON field '%s' is not an array.", strna(name)); | |
3434 | return -EINVAL; | |
3435 | } | |
3436 | ||
3437 | for (i = 0; i < json_variant_elements(variant); i++) { | |
3438 | JsonVariant *e; | |
3439 | ||
3440 | assert_se(e = json_variant_by_index(variant, i)); | |
3441 | ||
3442 | if (!json_variant_is_string(e)) { | |
3443 | json_log(e, 0, flags, "JSON array element is not a string."); | |
3444 | return -EINVAL; | |
3445 | } | |
3446 | ||
3447 | r = strv_extend(&l, json_variant_string(e)); | |
3448 | if (r < 0) | |
3449 | return json_log(variant, flags, r, "Failed to append array element: %m"); | |
3450 | } | |
3451 | ||
3452 | strv_free_and_replace(*s, l); | |
3453 | return 0; | |
3454 | } | |
3455 | ||
3456 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3457 | JsonVariant **p = userdata; | |
3458 | ||
3459 | assert(variant); | |
3460 | assert(p); | |
3461 | ||
3462 | json_variant_unref(*p); | |
3463 | *p = json_variant_ref(variant); | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { | |
3469 | [JSON_VARIANT_STRING] = "string", | |
3470 | [JSON_VARIANT_INTEGER] = "integer", | |
3471 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
3472 | [JSON_VARIANT_REAL] = "real", | |
3473 | [JSON_VARIANT_NUMBER] = "number", | |
3474 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
3475 | [JSON_VARIANT_ARRAY] = "array", | |
3476 | [JSON_VARIANT_OBJECT] = "object", | |
3477 | [JSON_VARIANT_NULL] = "null", | |
3478 | }; | |
3479 | ||
3480 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |