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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" | |
2b2fec7d | 14 | #include "errno-util.h" |
cd0b6c53 LP |
15 | #include "fd-util.h" |
16 | #include "fileio.h" | |
17 | #include "float.h" | |
18 | #include "hexdecoct.h" | |
19 | #include "json-internal.h" | |
20 | #include "json.h" | |
21 | #include "macro.h" | |
0a970718 | 22 | #include "memory-util.h" |
cd0b6c53 LP |
23 | #include "string-table.h" |
24 | #include "string-util.h" | |
25 | #include "strv.h" | |
26 | #include "terminal-util.h" | |
27 | #include "utf8.h" | |
28 | ||
d4a389eb | 29 | /* Refuse putting together variants with a larger depth than 4K by default (as a protection against overflowing stacks |
b2fa0d4f | 30 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
d4a389eb YW |
31 | * remains under 2^16. |
32 | * The value was 16k, but it was discovered to be too high on llvm/x86-64. See also the issue #10738. */ | |
33 | #define DEPTH_MAX (4U*1024U) | |
b2fa0d4f LP |
34 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
35 | ||
cd0b6c53 LP |
36 | typedef struct JsonSource { |
37 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
38 | size_t n_ref; | |
39 | unsigned max_line; | |
40 | unsigned max_column; | |
41 | char name[]; | |
42 | } JsonSource; | |
43 | ||
44 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
45 | struct JsonVariant { | |
46 | union { | |
47 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
48 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
49 | * see below.) */ | |
50 | size_t n_ref; | |
51 | ||
52 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
53 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
54 | JsonVariant *parent; | |
55 | }; | |
56 | ||
a7efb030 LP |
57 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ |
58 | JsonSource *source; | |
59 | unsigned line, column; | |
60 | ||
cd0b6c53 LP |
61 | JsonVariantType type:5; |
62 | ||
63 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
64 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
65 | bool is_embedded:1; | |
66 | ||
67 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
68 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
69 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
70 | bool is_reference:1; | |
71 | ||
72 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
73 | bool is_marked:1; | |
74 | ||
b2fa0d4f LP |
75 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
76 | uint16_t depth; | |
cd0b6c53 LP |
77 | |
78 | union { | |
79 | /* For simple types we store the value in-line. */ | |
80 | JsonValue value; | |
81 | ||
82 | /* For objects and arrays we store the number of elements immediately following */ | |
83 | size_t n_elements; | |
84 | ||
85 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
86 | JsonVariant *reference; | |
87 | ||
88 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
89 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
90 | * element, while longer strings are stored as references. When this object is not embedded into an | |
91 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
92 | * much larger than INLINE_STRING_LENGTH. | |
93 | * | |
94 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
95 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
96 | * would the union and then the struct this is included in. And of structures with undefined size we | |
97 | * can't allocate arrays (at least not easily). */ | |
98 | char string[0]; | |
99 | }; | |
100 | }; | |
101 | ||
102 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
103 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
104 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
105 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
106 | ||
107 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
108 | * (x86-64). */ | |
109 | #ifdef __x86_64__ | |
110 | assert_cc(sizeof(JsonVariant) == 48U); | |
111 | assert_cc(INLINE_STRING_MAX == 15U); | |
112 | #endif | |
113 | ||
114 | static JsonSource* json_source_new(const char *name) { | |
115 | JsonSource *s; | |
116 | ||
117 | assert(name); | |
118 | ||
119 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
120 | if (!s) | |
121 | return NULL; | |
122 | ||
123 | *s = (JsonSource) { | |
124 | .n_ref = 1, | |
125 | }; | |
126 | strcpy(s->name, name); | |
127 | ||
128 | return s; | |
129 | } | |
130 | ||
131 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
132 | ||
133 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
134 | if (a == b) | |
135 | return true; | |
136 | ||
137 | if (!a || !b) | |
138 | return false; | |
139 | ||
140 | return streq(a->name, b->name); | |
141 | } | |
142 | ||
143 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
144 | ||
d520d519 LP |
145 | /* There are four kind of JsonVariant* pointers: |
146 | * | |
147 | * 1. NULL | |
148 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
149 | * 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. | |
150 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
151 | * | |
152 | * The four kinds of pointers can be discerned like this: | |
153 | * | |
154 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
155 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
156 | * 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, | |
157 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
158 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
159 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
160 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
161 | ||
cd0b6c53 | 162 | static bool json_variant_is_magic(const JsonVariant *v) { |
4fcb507a LP |
163 | if (!v) |
164 | return false; | |
165 | ||
166 | return v < _JSON_VARIANT_MAGIC_MAX; | |
cd0b6c53 LP |
167 | } |
168 | ||
d520d519 LP |
169 | static bool json_variant_is_const_string(const JsonVariant *v) { |
170 | ||
171 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
172 | return false; | |
173 | ||
174 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
175 | * hence use all uneven pointers as indicators for const strings. */ | |
176 | ||
177 | return (((uintptr_t) v) & 1) != 0; | |
178 | } | |
179 | ||
180 | static bool json_variant_is_regular(const JsonVariant *v) { | |
181 | ||
182 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
183 | return false; | |
184 | ||
185 | return (((uintptr_t) v) & 1) == 0; | |
cd0b6c53 LP |
186 | } |
187 | ||
188 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
189 | ||
190 | /* Recursively dereference variants that are references to other variants */ | |
191 | ||
192 | if (!v) | |
193 | return NULL; | |
194 | ||
d520d519 | 195 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
196 | return v; |
197 | ||
198 | if (!v->is_reference) | |
199 | return v; | |
200 | ||
201 | return json_variant_dereference(v->reference); | |
202 | } | |
203 | ||
b2fa0d4f LP |
204 | static uint16_t json_variant_depth(JsonVariant *v) { |
205 | ||
206 | v = json_variant_dereference(v); | |
207 | if (!v) | |
208 | return 0; | |
209 | ||
d520d519 | 210 | if (!json_variant_is_regular(v)) |
b2fa0d4f LP |
211 | return 0; |
212 | ||
213 | return v->depth; | |
214 | } | |
215 | ||
cd0b6c53 LP |
216 | static JsonVariant *json_variant_normalize(JsonVariant *v) { |
217 | ||
218 | /* Converts json variants to their normalized form, i.e. fully dereferenced and wherever possible converted to | |
219 | * the "magic" version if there is one */ | |
220 | ||
221 | if (!v) | |
222 | return NULL; | |
223 | ||
224 | v = json_variant_dereference(v); | |
225 | ||
226 | switch (json_variant_type(v)) { | |
227 | ||
228 | case JSON_VARIANT_BOOLEAN: | |
229 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
230 | ||
231 | case JSON_VARIANT_NULL: | |
232 | return JSON_VARIANT_MAGIC_NULL; | |
233 | ||
234 | case JSON_VARIANT_INTEGER: | |
235 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
236 | ||
237 | case JSON_VARIANT_UNSIGNED: | |
238 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
239 | ||
240 | case JSON_VARIANT_REAL: | |
241 | #pragma GCC diagnostic push | |
242 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
243 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; | |
244 | #pragma GCC diagnostic pop | |
245 | ||
246 | case JSON_VARIANT_STRING: | |
247 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
248 | ||
249 | case JSON_VARIANT_ARRAY: | |
250 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
251 | ||
252 | case JSON_VARIANT_OBJECT: | |
253 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
254 | ||
255 | default: | |
256 | return v; | |
257 | } | |
258 | } | |
259 | ||
260 | static JsonVariant *json_variant_conservative_normalize(JsonVariant *v) { | |
261 | ||
262 | /* Much like json_variant_normalize(), but won't simplify if the variant has a source/line location attached to | |
263 | * it, in order not to lose context */ | |
264 | ||
265 | if (!v) | |
266 | return NULL; | |
267 | ||
d520d519 | 268 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
269 | return v; |
270 | ||
271 | if (v->source || v->line > 0 || v->column > 0) | |
272 | return v; | |
273 | ||
274 | return json_variant_normalize(v); | |
275 | } | |
276 | ||
277 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
278 | JsonVariant *v; | |
279 | ||
280 | assert_return(ret, -EINVAL); | |
281 | ||
282 | v = malloc0(offsetof(JsonVariant, value) + space); | |
283 | if (!v) | |
284 | return -ENOMEM; | |
285 | ||
286 | v->n_ref = 1; | |
287 | v->type = type; | |
288 | ||
289 | *ret = v; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
294 | JsonVariant *v; | |
295 | int r; | |
296 | ||
297 | assert_return(ret, -EINVAL); | |
298 | ||
299 | if (i == 0) { | |
300 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
305 | if (r < 0) | |
306 | return r; | |
307 | ||
308 | v->value.integer = i; | |
309 | *ret = v; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
315 | JsonVariant *v; | |
316 | int r; | |
317 | ||
318 | assert_return(ret, -EINVAL); | |
319 | if (u == 0) { | |
320 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
325 | if (r < 0) | |
326 | return r; | |
327 | ||
328 | v->value.unsig = u; | |
329 | *ret = v; | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
335 | JsonVariant *v; | |
336 | int r; | |
337 | ||
338 | assert_return(ret, -EINVAL); | |
339 | ||
340 | #pragma GCC diagnostic push | |
341 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
342 | if (d == 0.0) { | |
343 | #pragma GCC diagnostic pop | |
344 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
349 | if (r < 0) | |
350 | return r; | |
351 | ||
352 | v->value.real = d; | |
353 | *ret = v; | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
359 | assert_return(ret, -EINVAL); | |
360 | ||
361 | if (b) | |
362 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
363 | else | |
364 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | int json_variant_new_null(JsonVariant **ret) { | |
370 | assert_return(ret, -EINVAL); | |
371 | ||
372 | *ret = JSON_VARIANT_MAGIC_NULL; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
377 | JsonVariant *v; | |
378 | int r; | |
379 | ||
380 | assert_return(ret, -EINVAL); | |
381 | if (!s) { | |
382 | assert_return(n == 0, -EINVAL); | |
383 | return json_variant_new_null(ret); | |
384 | } | |
385 | if (n == 0) { | |
386 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); | |
391 | if (r < 0) | |
392 | return r; | |
393 | ||
394 | memcpy(v->string, s, n); | |
395 | v->string[n] = 0; | |
396 | ||
397 | *ret = v; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { | |
402 | assert(a); | |
403 | ||
404 | b = json_variant_dereference(b); | |
405 | if (!b) { | |
406 | a->type = JSON_VARIANT_NULL; | |
407 | return; | |
408 | } | |
409 | ||
410 | a->type = json_variant_type(b); | |
411 | switch (a->type) { | |
412 | ||
413 | case JSON_VARIANT_INTEGER: | |
414 | a->value.integer = json_variant_integer(b); | |
415 | break; | |
416 | ||
417 | case JSON_VARIANT_UNSIGNED: | |
418 | a->value.unsig = json_variant_unsigned(b); | |
419 | break; | |
420 | ||
421 | case JSON_VARIANT_REAL: | |
422 | a->value.real = json_variant_real(b); | |
423 | break; | |
424 | ||
425 | case JSON_VARIANT_BOOLEAN: | |
426 | a->value.boolean = json_variant_boolean(b); | |
427 | break; | |
428 | ||
429 | case JSON_VARIANT_STRING: { | |
430 | const char *s; | |
431 | ||
432 | assert_se(s = json_variant_string(b)); | |
433 | ||
434 | /* Short strings we can store inline */ | |
435 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
436 | strcpy(a->string, s); | |
437 | break; | |
438 | } | |
439 | ||
440 | /* For longer strings, use a reference… */ | |
441 | _fallthrough_; | |
442 | } | |
443 | ||
444 | case JSON_VARIANT_ARRAY: | |
445 | case JSON_VARIANT_OBJECT: | |
446 | a->is_reference = true; | |
447 | a->reference = json_variant_ref(json_variant_conservative_normalize(b)); | |
448 | break; | |
449 | ||
450 | case JSON_VARIANT_NULL: | |
451 | break; | |
452 | ||
453 | default: | |
454 | assert_not_reached("Unexpected variant type"); | |
455 | } | |
456 | } | |
457 | ||
458 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
459 | assert(v); | |
460 | assert(from); | |
461 | ||
d520d519 | 462 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
463 | return; |
464 | ||
465 | v->line = from->line; | |
466 | v->column = from->column; | |
467 | v->source = json_source_ref(from->source); | |
468 | } | |
469 | ||
470 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 471 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
472 | |
473 | assert_return(ret, -EINVAL); | |
474 | if (n == 0) { | |
475 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
476 | return 0; | |
477 | } | |
478 | assert_return(array, -EINVAL); | |
479 | ||
480 | v = new(JsonVariant, n + 1); | |
481 | if (!v) | |
482 | return -ENOMEM; | |
483 | ||
484 | *v = (JsonVariant) { | |
485 | .n_ref = 1, | |
486 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
487 | }; |
488 | ||
b2fa0d4f LP |
489 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
490 | JsonVariant *w = v + 1 + v->n_elements, | |
491 | *c = array[v->n_elements]; | |
492 | uint16_t d; | |
493 | ||
494 | d = json_variant_depth(c); | |
495 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
496 | return -ELNRNG; | |
497 | if (d >= v->depth) | |
498 | v->depth = d + 1; | |
cd0b6c53 LP |
499 | |
500 | *w = (JsonVariant) { | |
501 | .is_embedded = true, | |
502 | .parent = v, | |
503 | }; | |
504 | ||
b2fa0d4f LP |
505 | json_variant_set(w, c); |
506 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
507 | } |
508 | ||
b2fa0d4f | 509 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
510 | return 0; |
511 | } | |
512 | ||
513 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
514 | JsonVariant *v; | |
515 | size_t i; | |
516 | ||
517 | assert_return(ret, -EINVAL); | |
518 | if (n == 0) { | |
519 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
520 | return 0; | |
521 | } | |
522 | assert_return(p, -EINVAL); | |
523 | ||
524 | v = new(JsonVariant, n + 1); | |
525 | if (!v) | |
526 | return -ENOMEM; | |
527 | ||
528 | *v = (JsonVariant) { | |
529 | .n_ref = 1, | |
530 | .type = JSON_VARIANT_ARRAY, | |
531 | .n_elements = n, | |
b2fa0d4f | 532 | .depth = 1, |
cd0b6c53 LP |
533 | }; |
534 | ||
535 | for (i = 0; i < n; i++) { | |
536 | JsonVariant *w = v + 1 + i; | |
537 | ||
538 | *w = (JsonVariant) { | |
539 | .is_embedded = true, | |
540 | .parent = v, | |
a1559e3f LP |
541 | .type = JSON_VARIANT_UNSIGNED, |
542 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 543 | }; |
cd0b6c53 LP |
544 | } |
545 | ||
546 | *ret = v; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
551 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
552 | size_t n; | |
553 | int r; | |
554 | ||
555 | assert(ret); | |
556 | ||
557 | n = strv_length(l); | |
558 | if (n == 0) { | |
559 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
560 | return 0; | |
561 | } | |
562 | ||
a1559e3f | 563 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
564 | if (!v) |
565 | return -ENOMEM; | |
566 | ||
567 | *v = (JsonVariant) { | |
568 | .n_ref = 1, | |
569 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 570 | .depth = 1, |
cd0b6c53 LP |
571 | }; |
572 | ||
573 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
574 | JsonVariant *w = v + 1 + v->n_elements; | |
575 | size_t k; | |
576 | ||
a1559e3f LP |
577 | *w = (JsonVariant) { |
578 | .is_embedded = true, | |
579 | .parent = v, | |
580 | .type = JSON_VARIANT_STRING, | |
581 | }; | |
cd0b6c53 LP |
582 | |
583 | k = strlen(l[v->n_elements]); | |
584 | ||
585 | if (k > INLINE_STRING_MAX) { | |
586 | /* If string is too long, store it as reference. */ | |
587 | ||
588 | r = json_variant_new_stringn(&w->reference, l[v->n_elements], k); | |
589 | if (r < 0) | |
590 | return r; | |
591 | ||
592 | w->is_reference = true; | |
593 | } else | |
594 | memcpy(w->string, l[v->n_elements], k+1); | |
595 | } | |
596 | ||
597 | *ret = TAKE_PTR(v); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 602 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
603 | |
604 | assert_return(ret, -EINVAL); | |
605 | if (n == 0) { | |
606 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
607 | return 0; | |
608 | } | |
609 | assert_return(array, -EINVAL); | |
610 | assert_return(n % 2 == 0, -EINVAL); | |
611 | ||
612 | v = new(JsonVariant, n + 1); | |
613 | if (!v) | |
614 | return -ENOMEM; | |
615 | ||
616 | *v = (JsonVariant) { | |
617 | .n_ref = 1, | |
618 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
619 | }; |
620 | ||
b2fa0d4f LP |
621 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
622 | JsonVariant *w = v + 1 + v->n_elements, | |
623 | *c = array[v->n_elements]; | |
624 | uint16_t d; | |
625 | ||
d77e781f LP |
626 | if ((v->n_elements & 1) == 0 && |
627 | !json_variant_is_string(c)) | |
628 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
629 | ||
b2fa0d4f LP |
630 | d = json_variant_depth(c); |
631 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
632 | return -ELNRNG; | |
633 | if (d >= v->depth) | |
634 | v->depth = d + 1; | |
cd0b6c53 LP |
635 | |
636 | *w = (JsonVariant) { | |
637 | .is_embedded = true, | |
638 | .parent = v, | |
639 | }; | |
640 | ||
b2fa0d4f LP |
641 | json_variant_set(w, c); |
642 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
643 | } |
644 | ||
b2fa0d4f | 645 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
646 | return 0; |
647 | } | |
648 | ||
649 | static void json_variant_free_inner(JsonVariant *v) { | |
650 | assert(v); | |
651 | ||
d520d519 | 652 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
653 | return; |
654 | ||
655 | json_source_unref(v->source); | |
656 | ||
657 | if (v->is_reference) { | |
658 | json_variant_unref(v->reference); | |
659 | return; | |
660 | } | |
661 | ||
662 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
663 | size_t i; | |
664 | ||
665 | for (i = 0; i < v->n_elements; i++) | |
666 | json_variant_free_inner(v + 1 + i); | |
667 | } | |
668 | } | |
669 | ||
670 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
671 | if (!v) | |
672 | return NULL; | |
d520d519 | 673 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
674 | return v; |
675 | ||
676 | if (v->is_embedded) | |
677 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
678 | else { | |
679 | assert(v->n_ref > 0); | |
680 | v->n_ref++; | |
681 | } | |
682 | ||
683 | return v; | |
684 | } | |
685 | ||
686 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
687 | if (!v) | |
688 | return NULL; | |
d520d519 | 689 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
690 | return NULL; |
691 | ||
692 | if (v->is_embedded) | |
693 | json_variant_unref(v->parent); | |
694 | else { | |
695 | assert(v->n_ref > 0); | |
696 | v->n_ref--; | |
697 | ||
698 | if (v->n_ref == 0) { | |
699 | json_variant_free_inner(v); | |
700 | free(v); | |
701 | } | |
702 | } | |
703 | ||
704 | return NULL; | |
705 | } | |
706 | ||
707 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
708 | size_t i; | |
709 | ||
710 | assert(array || n == 0); | |
711 | ||
712 | for (i = 0; i < n; i++) | |
713 | json_variant_unref(array[i]); | |
714 | } | |
715 | ||
716 | const char *json_variant_string(JsonVariant *v) { | |
717 | if (!v) | |
718 | return NULL; | |
719 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
720 | return ""; | |
721 | if (json_variant_is_magic(v)) | |
722 | goto mismatch; | |
d520d519 LP |
723 | if (json_variant_is_const_string(v)) { |
724 | uintptr_t p = (uintptr_t) v; | |
725 | ||
726 | assert((p & 1) != 0); | |
727 | return (const char*) (p ^ 1U); | |
728 | } | |
729 | ||
cd0b6c53 LP |
730 | if (v->is_reference) |
731 | return json_variant_string(v->reference); | |
732 | if (v->type != JSON_VARIANT_STRING) | |
733 | goto mismatch; | |
734 | ||
735 | return v->string; | |
736 | ||
737 | mismatch: | |
738 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
739 | return NULL; | |
740 | } | |
741 | ||
742 | bool json_variant_boolean(JsonVariant *v) { | |
743 | if (!v) | |
744 | goto mismatch; | |
745 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
746 | return true; | |
747 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
748 | return false; | |
d520d519 | 749 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
750 | goto mismatch; |
751 | if (v->type != JSON_VARIANT_BOOLEAN) | |
752 | goto mismatch; | |
753 | if (v->is_reference) | |
754 | return json_variant_boolean(v->reference); | |
755 | ||
756 | return v->value.boolean; | |
757 | ||
758 | mismatch: | |
759 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
760 | return false; | |
761 | } | |
762 | ||
763 | intmax_t json_variant_integer(JsonVariant *v) { | |
764 | if (!v) | |
765 | goto mismatch; | |
766 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
767 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
768 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
769 | return 0; | |
d520d519 | 770 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
771 | goto mismatch; |
772 | if (v->is_reference) | |
773 | return json_variant_integer(v->reference); | |
774 | ||
775 | switch (v->type) { | |
776 | ||
777 | case JSON_VARIANT_INTEGER: | |
778 | return v->value.integer; | |
779 | ||
780 | case JSON_VARIANT_UNSIGNED: | |
781 | if (v->value.unsig <= INTMAX_MAX) | |
782 | return (intmax_t) v->value.unsig; | |
783 | ||
784 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
785 | return 0; | |
786 | ||
787 | case JSON_VARIANT_REAL: { | |
788 | intmax_t converted; | |
789 | ||
790 | converted = (intmax_t) v->value.real; | |
791 | ||
792 | #pragma GCC diagnostic push | |
793 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
794 | if ((long double) converted == v->value.real) | |
795 | #pragma GCC diagnostic pop | |
796 | return converted; | |
797 | ||
798 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
799 | return 0; | |
800 | } | |
801 | ||
802 | default: | |
803 | break; | |
804 | } | |
805 | ||
806 | mismatch: | |
807 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
808 | return 0; | |
809 | } | |
810 | ||
811 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
812 | if (!v) | |
813 | goto mismatch; | |
814 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
815 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
816 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
817 | return 0; | |
d520d519 | 818 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
819 | goto mismatch; |
820 | if (v->is_reference) | |
821 | return json_variant_integer(v->reference); | |
822 | ||
823 | switch (v->type) { | |
824 | ||
825 | case JSON_VARIANT_INTEGER: | |
826 | if (v->value.integer >= 0) | |
827 | return (uintmax_t) v->value.integer; | |
828 | ||
829 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
830 | return 0; | |
831 | ||
832 | case JSON_VARIANT_UNSIGNED: | |
833 | return v->value.unsig; | |
834 | ||
835 | case JSON_VARIANT_REAL: { | |
836 | uintmax_t converted; | |
837 | ||
838 | converted = (uintmax_t) v->value.real; | |
839 | ||
840 | #pragma GCC diagnostic push | |
841 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
842 | if ((long double) converted == v->value.real) | |
843 | #pragma GCC diagnostic pop | |
844 | return converted; | |
845 | ||
846 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
847 | return 0; | |
848 | } | |
849 | ||
850 | default: | |
851 | break; | |
852 | } | |
853 | ||
854 | mismatch: | |
855 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | long double json_variant_real(JsonVariant *v) { | |
860 | if (!v) | |
861 | return 0.0; | |
862 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
863 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
864 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
865 | return 0.0; | |
d520d519 | 866 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
867 | goto mismatch; |
868 | if (v->is_reference) | |
869 | return json_variant_real(v->reference); | |
870 | ||
871 | switch (v->type) { | |
872 | ||
873 | case JSON_VARIANT_REAL: | |
874 | return v->value.real; | |
875 | ||
876 | case JSON_VARIANT_INTEGER: { | |
877 | long double converted; | |
878 | ||
879 | converted = (long double) v->value.integer; | |
880 | ||
881 | if ((intmax_t) converted == v->value.integer) | |
882 | return converted; | |
883 | ||
884 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
885 | return 0.0; | |
886 | } | |
887 | ||
888 | case JSON_VARIANT_UNSIGNED: { | |
889 | long double converted; | |
890 | ||
891 | converted = (long double) v->value.unsig; | |
892 | ||
893 | if ((uintmax_t) converted == v->value.unsig) | |
894 | return converted; | |
895 | ||
896 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
897 | return 0.0; | |
898 | } | |
899 | ||
900 | default: | |
901 | break; | |
902 | } | |
903 | ||
904 | mismatch: | |
905 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 906 | return 0.0; |
cd0b6c53 LP |
907 | } |
908 | ||
909 | bool json_variant_is_negative(JsonVariant *v) { | |
910 | if (!v) | |
911 | goto mismatch; | |
912 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
913 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
914 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
915 | return false; | |
d520d519 | 916 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
917 | goto mismatch; |
918 | if (v->is_reference) | |
919 | return json_variant_is_negative(v->reference); | |
920 | ||
921 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
922 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
923 | * values. */ | |
924 | ||
925 | switch (v->type) { | |
926 | ||
927 | case JSON_VARIANT_REAL: | |
928 | return v->value.real < 0; | |
929 | ||
930 | case JSON_VARIANT_INTEGER: | |
931 | return v->value.integer < 0; | |
932 | ||
933 | case JSON_VARIANT_UNSIGNED: | |
934 | return false; | |
935 | ||
936 | default: | |
937 | break; | |
938 | } | |
939 | ||
940 | mismatch: | |
941 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
942 | return false; | |
943 | } | |
944 | ||
945 | JsonVariantType json_variant_type(JsonVariant *v) { | |
946 | ||
947 | if (!v) | |
948 | return _JSON_VARIANT_TYPE_INVALID; | |
949 | ||
d520d519 LP |
950 | if (json_variant_is_const_string(v)) |
951 | return JSON_VARIANT_STRING; | |
952 | ||
cd0b6c53 LP |
953 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
954 | return JSON_VARIANT_BOOLEAN; | |
955 | ||
956 | if (v == JSON_VARIANT_MAGIC_NULL) | |
957 | return JSON_VARIANT_NULL; | |
958 | ||
959 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
960 | return JSON_VARIANT_INTEGER; | |
961 | ||
962 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
963 | return JSON_VARIANT_UNSIGNED; | |
964 | ||
965 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
966 | return JSON_VARIANT_REAL; | |
967 | ||
968 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
969 | return JSON_VARIANT_STRING; | |
970 | ||
971 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
972 | return JSON_VARIANT_ARRAY; | |
973 | ||
974 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
975 | return JSON_VARIANT_OBJECT; | |
976 | ||
977 | return v->type; | |
978 | } | |
979 | ||
980 | bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { | |
981 | JsonVariantType rt; | |
982 | ||
983 | v = json_variant_dereference(v); | |
f8c186c9 LP |
984 | if (!v) |
985 | return false; | |
cd0b6c53 LP |
986 | |
987 | rt = json_variant_type(v); | |
988 | if (rt == type) | |
989 | return true; | |
990 | ||
d520d519 LP |
991 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
992 | if (json_variant_is_const_string(v)) | |
993 | return false; | |
994 | ||
cd0b6c53 LP |
995 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
996 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
997 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
998 | return true; | |
999 | ||
1000 | /* All other magic variant types are only equal to themselves */ | |
1001 | if (json_variant_is_magic(v)) | |
1002 | return false; | |
1003 | ||
1004 | /* Handle the "number" pseudo type */ | |
1005 | if (type == JSON_VARIANT_NUMBER) | |
1006 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1007 | ||
1008 | /* Integer conversions are OK in many cases */ | |
1009 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1010 | return v->value.integer >= 0; | |
1011 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1012 | return v->value.unsig <= INTMAX_MAX; | |
1013 | ||
1014 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1015 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1016 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1017 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1018 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1019 | ||
1020 | #pragma GCC diagnostic push | |
1021 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1022 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ | |
1023 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1024 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1025 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1026 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
1027 | #pragma GCC diagnostic pop | |
1028 | ||
1029 | return false; | |
1030 | } | |
1031 | ||
1032 | size_t json_variant_elements(JsonVariant *v) { | |
1033 | if (!v) | |
1034 | return 0; | |
1035 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1036 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1037 | return 0; | |
d520d519 | 1038 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1039 | goto mismatch; |
1040 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1041 | goto mismatch; | |
1042 | if (v->is_reference) | |
1043 | return json_variant_elements(v->reference); | |
1044 | ||
1045 | return v->n_elements; | |
1046 | ||
1047 | mismatch: | |
1048 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1053 | if (!v) | |
1054 | return NULL; | |
1055 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1056 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1057 | return NULL; | |
d520d519 | 1058 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1059 | goto mismatch; |
1060 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1061 | goto mismatch; | |
1062 | if (v->is_reference) | |
1063 | return json_variant_by_index(v->reference, idx); | |
1064 | if (idx >= v->n_elements) | |
1065 | return NULL; | |
1066 | ||
1067 | return json_variant_conservative_normalize(v + 1 + idx); | |
1068 | ||
1069 | mismatch: | |
1070 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1071 | return NULL; | |
1072 | } | |
1073 | ||
1074 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1075 | size_t i; | |
1076 | ||
1077 | if (!v) | |
1078 | goto not_found; | |
1079 | if (!key) | |
1080 | goto not_found; | |
1081 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1082 | goto not_found; | |
d520d519 | 1083 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1084 | goto mismatch; |
1085 | if (v->type != JSON_VARIANT_OBJECT) | |
1086 | goto mismatch; | |
1087 | if (v->is_reference) | |
1088 | return json_variant_by_key(v->reference, key); | |
1089 | ||
1090 | for (i = 0; i < v->n_elements; i += 2) { | |
1091 | JsonVariant *p; | |
1092 | ||
1093 | p = json_variant_dereference(v + 1 + i); | |
1094 | ||
1095 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1096 | continue; | |
1097 | ||
1098 | if (streq(json_variant_string(p), key)) { | |
1099 | ||
1100 | if (ret_key) | |
1101 | *ret_key = json_variant_conservative_normalize(v + 1 + i); | |
1102 | ||
1103 | return json_variant_conservative_normalize(v + 1 + i + 1); | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | not_found: | |
1108 | if (ret_key) | |
1109 | *ret_key = NULL; | |
1110 | ||
1111 | return NULL; | |
1112 | ||
1113 | mismatch: | |
1114 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1115 | if (ret_key) | |
1116 | *ret_key = NULL; | |
1117 | ||
1118 | return NULL; | |
1119 | } | |
1120 | ||
1121 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1122 | return json_variant_by_key_full(v, key, NULL); | |
1123 | } | |
1124 | ||
1125 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1126 | JsonVariantType t; | |
1127 | ||
1128 | a = json_variant_normalize(a); | |
1129 | b = json_variant_normalize(b); | |
1130 | ||
1131 | if (a == b) | |
1132 | return true; | |
1133 | ||
1134 | t = json_variant_type(a); | |
1135 | if (!json_variant_has_type(b, t)) | |
1136 | return false; | |
1137 | ||
1138 | switch (t) { | |
1139 | ||
1140 | case JSON_VARIANT_STRING: | |
1141 | return streq(json_variant_string(a), json_variant_string(b)); | |
1142 | ||
1143 | case JSON_VARIANT_INTEGER: | |
1144 | return json_variant_integer(a) == json_variant_integer(b); | |
1145 | ||
1146 | case JSON_VARIANT_UNSIGNED: | |
1147 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1148 | ||
1149 | case JSON_VARIANT_REAL: | |
1150 | #pragma GCC diagnostic push | |
1151 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1152 | return json_variant_real(a) == json_variant_real(b); | |
1153 | #pragma GCC diagnostic pop | |
1154 | ||
1155 | case JSON_VARIANT_BOOLEAN: | |
1156 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1157 | ||
1158 | case JSON_VARIANT_NULL: | |
1159 | return true; | |
1160 | ||
1161 | case JSON_VARIANT_ARRAY: { | |
1162 | size_t i, n; | |
1163 | ||
1164 | n = json_variant_elements(a); | |
1165 | if (n != json_variant_elements(b)) | |
1166 | return false; | |
1167 | ||
1168 | for (i = 0; i < n; i++) { | |
1169 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1170 | return false; | |
1171 | } | |
1172 | ||
1173 | return true; | |
1174 | } | |
1175 | ||
1176 | case JSON_VARIANT_OBJECT: { | |
1177 | size_t i, n; | |
1178 | ||
1179 | n = json_variant_elements(a); | |
1180 | if (n != json_variant_elements(b)) | |
1181 | return false; | |
1182 | ||
1183 | /* Iterate through all keys in 'a' */ | |
1184 | for (i = 0; i < n; i += 2) { | |
1185 | bool found = false; | |
1186 | size_t j; | |
1187 | ||
1188 | /* Match them against all keys in 'b' */ | |
1189 | for (j = 0; j < n; j += 2) { | |
1190 | JsonVariant *key_b; | |
1191 | ||
1192 | key_b = json_variant_by_index(b, j); | |
1193 | ||
1194 | /* During the first iteration unmark everything */ | |
1195 | if (i == 0) | |
1196 | key_b->is_marked = false; | |
1197 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1198 | continue; | |
1199 | ||
1200 | if (found) | |
1201 | continue; | |
1202 | ||
1203 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1204 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1205 | /* Key and values match! */ | |
1206 | key_b->is_marked = found = true; | |
1207 | ||
1208 | /* In the first iteration we continue the inner loop since we want to mark | |
1209 | * everything, otherwise exit the loop quickly after we found what we were | |
1210 | * looking for. */ | |
1211 | if (i != 0) | |
1212 | break; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | if (!found) | |
1217 | return false; | |
1218 | } | |
1219 | ||
1220 | return true; | |
1221 | } | |
1222 | ||
1223 | default: | |
1224 | assert_not_reached("Unknown variant type."); | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { | |
1229 | assert_return(v, -EINVAL); | |
1230 | ||
1231 | if (ret_source) | |
d520d519 | 1232 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1233 | |
1234 | if (ret_line) | |
d520d519 | 1235 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1236 | |
1237 | if (ret_column) | |
d520d519 | 1238 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1239 | |
1240 | return 0; | |
1241 | } | |
1242 | ||
897f099b | 1243 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1244 | size_t w, k; |
1245 | ||
1246 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1247 | return 0; | |
1248 | ||
d520d519 | 1249 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1250 | return 0; |
1251 | ||
1252 | if (!v->source && v->line == 0 && v->column == 0) | |
1253 | return 0; | |
1254 | ||
1255 | /* The max width we need to format the line numbers for this source file */ | |
1256 | w = (v->source && v->source->max_line > 0) ? | |
1257 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1258 | DECIMAL_STR_MAX(unsigned)-1; | |
1259 | k = (v->source && v->source->max_column > 0) ? | |
1260 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1261 | DECIMAL_STR_MAX(unsigned) -1; | |
1262 | ||
1263 | if (whitespace) { | |
1264 | size_t i, n; | |
1265 | ||
1266 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1267 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1268 | (v->line > 0 ? w : 0) + | |
1269 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1270 | (v->column > 0 ? k : 0) + | |
1271 | 2; | |
1272 | ||
1273 | for (i = 0; i < n; i++) | |
1274 | fputc(' ', f); | |
1275 | } else { | |
1276 | fputc('[', f); | |
1277 | ||
1278 | if (v->source) | |
1279 | fputs(v->source->name, f); | |
1280 | if (v->source && (v->line > 0 || v->column > 0)) | |
1281 | fputc(':', f); | |
1282 | if (v->line > 0) | |
1283 | fprintf(f, "%*u", (int) w, v->line); | |
1284 | if ((v->source || v->line > 0) || v->column > 0) | |
1285 | fputc(':', f); | |
1286 | if (v->column > 0) | |
1287 | fprintf(f, "%*u", (int) k, v->column); | |
1288 | ||
1289 | fputc(']', f); | |
1290 | fputc(' ', f); | |
1291 | } | |
1292 | ||
1293 | return 0; | |
1294 | } | |
1295 | ||
897f099b | 1296 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1297 | int r; |
1298 | ||
1299 | assert(f); | |
1300 | assert(v); | |
1301 | ||
1302 | switch (json_variant_type(v)) { | |
1303 | ||
1304 | case JSON_VARIANT_REAL: { | |
1305 | locale_t loc; | |
1306 | ||
1307 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1308 | if (loc == (locale_t) 0) | |
1309 | return -errno; | |
1310 | ||
1311 | if (flags & JSON_FORMAT_COLOR) | |
1312 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1313 | ||
1314 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1315 | ||
1316 | if (flags & JSON_FORMAT_COLOR) | |
1317 | fputs(ANSI_NORMAL, f); | |
1318 | ||
1319 | freelocale(loc); | |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | case JSON_VARIANT_INTEGER: | |
1324 | if (flags & JSON_FORMAT_COLOR) | |
1325 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1326 | ||
1327 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1328 | ||
1329 | if (flags & JSON_FORMAT_COLOR) | |
1330 | fputs(ANSI_NORMAL, f); | |
1331 | break; | |
1332 | ||
1333 | case JSON_VARIANT_UNSIGNED: | |
1334 | if (flags & JSON_FORMAT_COLOR) | |
1335 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1336 | ||
1337 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1338 | ||
1339 | if (flags & JSON_FORMAT_COLOR) | |
1340 | fputs(ANSI_NORMAL, f); | |
1341 | break; | |
1342 | ||
1343 | case JSON_VARIANT_BOOLEAN: | |
1344 | ||
1345 | if (flags & JSON_FORMAT_COLOR) | |
1346 | fputs(ANSI_HIGHLIGHT, f); | |
1347 | ||
1348 | if (json_variant_boolean(v)) | |
1349 | fputs("true", f); | |
1350 | else | |
1351 | fputs("false", f); | |
1352 | ||
1353 | if (flags & JSON_FORMAT_COLOR) | |
1354 | fputs(ANSI_NORMAL, f); | |
1355 | ||
1356 | break; | |
1357 | ||
1358 | case JSON_VARIANT_NULL: | |
1359 | if (flags & JSON_FORMAT_COLOR) | |
1360 | fputs(ANSI_HIGHLIGHT, f); | |
1361 | ||
1362 | fputs("null", f); | |
1363 | ||
1364 | if (flags & JSON_FORMAT_COLOR) | |
1365 | fputs(ANSI_NORMAL, f); | |
1366 | break; | |
1367 | ||
1368 | case JSON_VARIANT_STRING: { | |
1369 | const char *q; | |
1370 | ||
1371 | fputc('"', f); | |
1372 | ||
1373 | if (flags & JSON_FORMAT_COLOR) | |
1374 | fputs(ANSI_GREEN, f); | |
1375 | ||
1376 | for (q = json_variant_string(v); *q; q++) { | |
1377 | ||
1378 | switch (*q) { | |
1379 | ||
1380 | case '"': | |
1381 | fputs("\\\"", f); | |
1382 | break; | |
1383 | ||
1384 | case '\\': | |
1385 | fputs("\\\\", f); | |
1386 | break; | |
1387 | ||
cd0b6c53 LP |
1388 | case '\b': |
1389 | fputs("\\b", f); | |
1390 | break; | |
1391 | ||
1392 | case '\f': | |
1393 | fputs("\\f", f); | |
1394 | break; | |
1395 | ||
1396 | case '\n': | |
1397 | fputs("\\n", f); | |
1398 | break; | |
1399 | ||
1400 | case '\r': | |
1401 | fputs("\\r", f); | |
1402 | break; | |
1403 | ||
1404 | case '\t': | |
1405 | fputs("\\t", f); | |
1406 | break; | |
1407 | ||
1408 | default: | |
df7f9e0b | 1409 | if ((signed char) *q >= 0 && *q < ' ') |
cd0b6c53 LP |
1410 | fprintf(f, "\\u%04x", *q); |
1411 | else | |
1412 | fputc(*q, f); | |
1413 | break; | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | if (flags & JSON_FORMAT_COLOR) | |
1418 | fputs(ANSI_NORMAL, f); | |
1419 | ||
1420 | fputc('"', f); | |
1421 | break; | |
1422 | } | |
1423 | ||
1424 | case JSON_VARIANT_ARRAY: { | |
1425 | size_t i, n; | |
1426 | ||
1427 | n = json_variant_elements(v); | |
1428 | ||
1429 | if (n == 0) | |
1430 | fputs("[]", f); | |
1431 | else { | |
4ae7e4e5 | 1432 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1433 | const char *prefix2; |
1434 | ||
1435 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1436 | joined = strjoin(strempty(prefix), "\t"); |
1437 | if (!joined) | |
1438 | return -ENOMEM; | |
1439 | ||
1440 | prefix2 = joined; | |
cd0b6c53 LP |
1441 | fputs("[\n", f); |
1442 | } else { | |
1443 | prefix2 = strempty(prefix); | |
1444 | fputc('[', f); | |
1445 | } | |
1446 | ||
1447 | for (i = 0; i < n; i++) { | |
1448 | JsonVariant *e; | |
1449 | ||
1450 | assert_se(e = json_variant_by_index(v, i)); | |
1451 | ||
1452 | if (i > 0) { | |
1453 | if (flags & JSON_FORMAT_PRETTY) | |
1454 | fputs(",\n", f); | |
1455 | else | |
1456 | fputc(',', f); | |
1457 | } | |
1458 | ||
1459 | if (flags & JSON_FORMAT_PRETTY) { | |
1460 | print_source(f, e, flags, false); | |
1461 | fputs(prefix2, f); | |
1462 | } | |
1463 | ||
1464 | r = json_format(f, e, flags, prefix2); | |
1465 | if (r < 0) | |
1466 | return r; | |
1467 | } | |
1468 | ||
1469 | if (flags & JSON_FORMAT_PRETTY) { | |
1470 | fputc('\n', f); | |
1471 | print_source(f, v, flags, true); | |
1472 | fputs(strempty(prefix), f); | |
1473 | } | |
1474 | ||
1475 | fputc(']', f); | |
1476 | } | |
1477 | break; | |
1478 | } | |
1479 | ||
1480 | case JSON_VARIANT_OBJECT: { | |
1481 | size_t i, n; | |
1482 | ||
1483 | n = json_variant_elements(v); | |
1484 | ||
1485 | if (n == 0) | |
1486 | fputs("{}", f); | |
1487 | else { | |
4ae7e4e5 | 1488 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1489 | const char *prefix2; |
1490 | ||
1491 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1492 | joined = strjoin(strempty(prefix), "\t"); |
1493 | if (!joined) | |
1494 | return -ENOMEM; | |
1495 | ||
1496 | prefix2 = joined; | |
cd0b6c53 LP |
1497 | fputs("{\n", f); |
1498 | } else { | |
1499 | prefix2 = strempty(prefix); | |
1500 | fputc('{', f); | |
1501 | } | |
1502 | ||
1503 | for (i = 0; i < n; i += 2) { | |
1504 | JsonVariant *e; | |
1505 | ||
1506 | e = json_variant_by_index(v, i); | |
1507 | ||
1508 | if (i > 0) { | |
1509 | if (flags & JSON_FORMAT_PRETTY) | |
1510 | fputs(",\n", f); | |
1511 | else | |
1512 | fputc(',', f); | |
1513 | } | |
1514 | ||
1515 | if (flags & JSON_FORMAT_PRETTY) { | |
1516 | print_source(f, e, flags, false); | |
1517 | fputs(prefix2, f); | |
1518 | } | |
1519 | ||
1520 | r = json_format(f, e, flags, prefix2); | |
1521 | if (r < 0) | |
1522 | return r; | |
1523 | ||
1524 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1525 | ||
1526 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1527 | if (r < 0) | |
1528 | return r; | |
1529 | } | |
1530 | ||
1531 | if (flags & JSON_FORMAT_PRETTY) { | |
1532 | fputc('\n', f); | |
1533 | print_source(f, v, flags, true); | |
1534 | fputs(strempty(prefix), f); | |
1535 | } | |
1536 | ||
1537 | fputc('}', f); | |
1538 | } | |
1539 | break; | |
1540 | } | |
1541 | ||
1542 | default: | |
1543 | assert_not_reached("Unexpected variant type."); | |
1544 | } | |
1545 | ||
1546 | return 0; | |
1547 | } | |
1548 | ||
897f099b | 1549 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1550 | _cleanup_free_ char *s = NULL; |
1551 | size_t sz = 0; | |
1552 | int r; | |
1553 | ||
1554 | assert_return(v, -EINVAL); | |
1555 | assert_return(ret, -EINVAL); | |
1556 | ||
1557 | { | |
1558 | _cleanup_fclose_ FILE *f = NULL; | |
1559 | ||
1560 | f = open_memstream(&s, &sz); | |
1561 | if (!f) | |
1562 | return -ENOMEM; | |
1563 | ||
1564 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); | |
1565 | ||
1566 | json_variant_dump(v, flags, f, NULL); | |
1567 | ||
1568 | r = fflush_and_check(f); | |
1569 | } | |
1570 | if (r < 0) | |
1571 | return r; | |
1572 | ||
1573 | assert(s); | |
1574 | *ret = TAKE_PTR(s); | |
1575 | ||
1576 | return (int) sz; | |
1577 | } | |
1578 | ||
897f099b | 1579 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1580 | if (!v) |
1581 | return; | |
1582 | ||
1583 | if (!f) | |
1584 | f = stdout; | |
1585 | ||
1586 | print_source(f, v, flags, false); | |
1587 | ||
ab91733c LP |
1588 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1589 | flags |= JSON_FORMAT_COLOR; | |
1590 | ||
cd0b6c53 LP |
1591 | if (flags & JSON_FORMAT_SSE) |
1592 | fputs("data: ", f); | |
1593 | if (flags & JSON_FORMAT_SEQ) | |
1594 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1595 | ||
1596 | json_format(f, v, flags, prefix); | |
1597 | ||
1598 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1599 | fputc('\n', f); | |
1600 | if (flags & JSON_FORMAT_SSE) | |
1601 | fputc('\n', f); /* In case of SSE add a second newline */ | |
1602 | } | |
1603 | ||
1604 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { | |
1605 | JsonVariantType t; | |
1606 | JsonVariant *c; | |
1607 | JsonValue value; | |
1608 | const void *source; | |
1609 | size_t k; | |
1610 | ||
1611 | assert(nv); | |
1612 | assert(v); | |
1613 | ||
1614 | /* Let's copy the simple types literally, and the larger types by references */ | |
1615 | t = json_variant_type(v); | |
1616 | switch (t) { | |
1617 | case JSON_VARIANT_INTEGER: | |
1618 | k = sizeof(intmax_t); | |
1619 | value.integer = json_variant_integer(v); | |
1620 | source = &value; | |
1621 | break; | |
1622 | ||
1623 | case JSON_VARIANT_UNSIGNED: | |
1624 | k = sizeof(uintmax_t); | |
1625 | value.unsig = json_variant_unsigned(v); | |
1626 | source = &value; | |
1627 | break; | |
1628 | ||
1629 | case JSON_VARIANT_REAL: | |
1630 | k = sizeof(long double); | |
1631 | value.real = json_variant_real(v); | |
1632 | source = &value; | |
1633 | break; | |
1634 | ||
1635 | case JSON_VARIANT_BOOLEAN: | |
1636 | k = sizeof(bool); | |
1637 | value.boolean = json_variant_boolean(v); | |
1638 | source = &value; | |
1639 | break; | |
1640 | ||
1641 | case JSON_VARIANT_NULL: | |
1642 | k = 0; | |
1643 | source = NULL; | |
1644 | break; | |
1645 | ||
1646 | case JSON_VARIANT_STRING: | |
1647 | source = json_variant_string(v); | |
1648 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
1649 | if (k <= INLINE_STRING_MAX) { | |
1650 | k ++; | |
1651 | break; | |
1652 | } | |
1653 | ||
1654 | _fallthrough_; | |
1655 | ||
1656 | default: | |
1657 | /* Everything else copy by reference */ | |
1658 | ||
1659 | c = malloc0(offsetof(JsonVariant, reference) + sizeof(JsonVariant*)); | |
1660 | if (!c) | |
1661 | return -ENOMEM; | |
1662 | ||
1663 | c->n_ref = 1; | |
1664 | c->type = t; | |
1665 | c->is_reference = true; | |
1666 | c->reference = json_variant_ref(json_variant_normalize(v)); | |
1667 | ||
1668 | *nv = c; | |
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | c = malloc0(offsetof(JsonVariant, value) + k); | |
1673 | if (!c) | |
1674 | return -ENOMEM; | |
1675 | ||
1676 | c->n_ref = 1; | |
1677 | c->type = t; | |
1678 | ||
1679 | memcpy_safe(&c->value, source, k); | |
1680 | ||
1681 | *nv = c; | |
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | static bool json_single_ref(JsonVariant *v) { | |
1686 | ||
1687 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
1688 | ||
d520d519 | 1689 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1690 | return false; |
1691 | ||
1692 | if (v->is_embedded) | |
1693 | return json_single_ref(v->parent); | |
1694 | ||
1695 | assert(v->n_ref > 0); | |
1696 | return v->n_ref == 1; | |
1697 | } | |
1698 | ||
1699 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
1700 | JsonVariant *w; | |
1701 | int r; | |
1702 | ||
1703 | assert(v); | |
1704 | ||
1705 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
1706 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
1707 | ||
1708 | if (!*v) | |
1709 | return 0; | |
1710 | ||
1711 | if (source && line > source->max_line) | |
1712 | source->max_line = line; | |
1713 | if (source && column > source->max_column) | |
1714 | source->max_column = column; | |
1715 | ||
d520d519 | 1716 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
1717 | |
1718 | if (!source && line == 0 && column == 0) | |
1719 | return 0; | |
1720 | ||
1721 | } else { | |
1722 | if (json_source_equal((*v)->source, source) && | |
1723 | (*v)->line == line && | |
1724 | (*v)->column == column) | |
1725 | return 0; | |
1726 | ||
1727 | if (json_single_ref(*v)) { /* Sole reference? */ | |
1728 | json_source_unref((*v)->source); | |
1729 | (*v)->source = json_source_ref(source); | |
1730 | (*v)->line = line; | |
1731 | (*v)->column = column; | |
1732 | return 1; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | r = json_variant_copy(&w, *v); | |
1737 | if (r < 0) | |
1738 | return r; | |
1739 | ||
d520d519 | 1740 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
1741 | assert(!w->is_embedded); |
1742 | assert(w->n_ref == 1); | |
1743 | assert(!w->source); | |
1744 | ||
1745 | w->source = json_source_ref(source); | |
1746 | w->line = line; | |
1747 | w->column = column; | |
1748 | ||
1749 | json_variant_unref(*v); | |
1750 | *v = w; | |
1751 | ||
1752 | return 1; | |
1753 | } | |
1754 | ||
1755 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
1756 | assert(line); | |
1757 | assert(column); | |
1758 | assert(s || n == 0); | |
1759 | ||
1760 | while (n > 0) { | |
cd0b6c53 LP |
1761 | if (*s == '\n') { |
1762 | (*line)++; | |
1763 | *column = 1; | |
df7f9e0b | 1764 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
1765 | (*column)++; |
1766 | else { | |
1767 | int w; | |
1768 | ||
92e068b4 | 1769 | w = utf8_encoded_valid_unichar(s, n); |
cd0b6c53 LP |
1770 | if (w < 0) /* count invalid unichars as normal characters */ |
1771 | w = 1; | |
1772 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
1773 | w = (int) n; | |
1774 | ||
1775 | (*column)++; | |
1776 | ||
1777 | s += w; | |
1778 | n -= w; | |
1779 | continue; | |
1780 | } | |
1781 | ||
1782 | s++; | |
1783 | n--; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
1788 | int aa, bb, cc, dd; | |
1789 | uint16_t x; | |
1790 | ||
1791 | assert(c); | |
1792 | assert(ret); | |
1793 | ||
1794 | aa = unhexchar(c[0]); | |
1795 | if (aa < 0) | |
1796 | return -EINVAL; | |
1797 | ||
1798 | bb = unhexchar(c[1]); | |
1799 | if (bb < 0) | |
1800 | return -EINVAL; | |
1801 | ||
1802 | cc = unhexchar(c[2]); | |
1803 | if (cc < 0) | |
1804 | return -EINVAL; | |
1805 | ||
1806 | dd = unhexchar(c[3]); | |
1807 | if (dd < 0) | |
1808 | return -EINVAL; | |
1809 | ||
1810 | x = ((uint16_t) aa << 12) | | |
1811 | ((uint16_t) bb << 8) | | |
1812 | ((uint16_t) cc << 4) | | |
1813 | ((uint16_t) dd); | |
1814 | ||
1815 | if (x <= 0) | |
1816 | return -EINVAL; | |
1817 | ||
1818 | *ret = x; | |
1819 | ||
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | static int json_parse_string(const char **p, char **ret) { | |
1824 | _cleanup_free_ char *s = NULL; | |
1825 | size_t n = 0, allocated = 0; | |
1826 | const char *c; | |
1827 | ||
1828 | assert(p); | |
1829 | assert(*p); | |
1830 | assert(ret); | |
1831 | ||
1832 | c = *p; | |
1833 | ||
1834 | if (*c != '"') | |
1835 | return -EINVAL; | |
1836 | ||
1837 | c++; | |
1838 | ||
1839 | for (;;) { | |
1840 | int len; | |
1841 | ||
1842 | /* Check for EOF */ | |
1843 | if (*c == 0) | |
1844 | return -EINVAL; | |
1845 | ||
1846 | /* Check for control characters 0x00..0x1f */ | |
1847 | if (*c > 0 && *c < ' ') | |
1848 | return -EINVAL; | |
1849 | ||
1850 | /* Check for control character 0x7f */ | |
1851 | if (*c == 0x7f) | |
1852 | return -EINVAL; | |
1853 | ||
1854 | if (*c == '"') { | |
1855 | if (!s) { | |
1856 | s = strdup(""); | |
1857 | if (!s) | |
1858 | return -ENOMEM; | |
1859 | } else | |
1860 | s[n] = 0; | |
1861 | ||
1862 | *p = c + 1; | |
1863 | ||
490c5a37 | 1864 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
1865 | return JSON_TOKEN_STRING; |
1866 | } | |
1867 | ||
1868 | if (*c == '\\') { | |
1869 | char ch = 0; | |
1870 | c++; | |
1871 | ||
1872 | if (*c == 0) | |
1873 | return -EINVAL; | |
1874 | ||
1875 | if (IN_SET(*c, '"', '\\', '/')) | |
1876 | ch = *c; | |
1877 | else if (*c == 'b') | |
1878 | ch = '\b'; | |
1879 | else if (*c == 'f') | |
1880 | ch = '\f'; | |
1881 | else if (*c == 'n') | |
1882 | ch = '\n'; | |
1883 | else if (*c == 'r') | |
1884 | ch = '\r'; | |
1885 | else if (*c == 't') | |
1886 | ch = '\t'; | |
1887 | else if (*c == 'u') { | |
1888 | char16_t x; | |
1889 | int r; | |
1890 | ||
1891 | r = unhex_ucs2(c + 1, &x); | |
1892 | if (r < 0) | |
1893 | return r; | |
1894 | ||
1895 | c += 5; | |
1896 | ||
1897 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
1898 | return -ENOMEM; | |
1899 | ||
1900 | if (!utf16_is_surrogate(x)) | |
1901 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
1902 | else if (utf16_is_trailing_surrogate(x)) | |
1903 | return -EINVAL; | |
1904 | else { | |
1905 | char16_t y; | |
1906 | ||
1907 | if (c[0] != '\\' || c[1] != 'u') | |
1908 | return -EINVAL; | |
1909 | ||
1910 | r = unhex_ucs2(c + 2, &y); | |
1911 | if (r < 0) | |
1912 | return r; | |
1913 | ||
1914 | c += 6; | |
1915 | ||
1916 | if (!utf16_is_trailing_surrogate(y)) | |
1917 | return -EINVAL; | |
1918 | ||
1919 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
1920 | } | |
1921 | ||
1922 | continue; | |
1923 | } else | |
1924 | return -EINVAL; | |
1925 | ||
1926 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
1927 | return -ENOMEM; | |
1928 | ||
1929 | s[n++] = ch; | |
1930 | c ++; | |
1931 | continue; | |
1932 | } | |
1933 | ||
92e068b4 | 1934 | len = utf8_encoded_valid_unichar(c, (size_t) -1); |
cd0b6c53 LP |
1935 | if (len < 0) |
1936 | return len; | |
1937 | ||
1938 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
1939 | return -ENOMEM; | |
1940 | ||
1941 | memcpy(s + n, c, len); | |
1942 | n += len; | |
1943 | c += len; | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | static int json_parse_number(const char **p, JsonValue *ret) { | |
1948 | bool negative = false, exponent_negative = false, is_real = false; | |
1949 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
1950 | intmax_t i = 0; | |
1951 | uintmax_t u = 0; | |
1952 | const char *c; | |
1953 | ||
1954 | assert(p); | |
1955 | assert(*p); | |
1956 | assert(ret); | |
1957 | ||
1958 | c = *p; | |
1959 | ||
1960 | if (*c == '-') { | |
1961 | negative = true; | |
1962 | c++; | |
1963 | } | |
1964 | ||
1965 | if (*c == '0') | |
1966 | c++; | |
1967 | else { | |
1968 | if (!strchr("123456789", *c) || *c == 0) | |
1969 | return -EINVAL; | |
1970 | ||
1971 | do { | |
1972 | if (!is_real) { | |
1973 | if (negative) { | |
1974 | ||
1975 | if (i < INTMAX_MIN / 10) /* overflow */ | |
1976 | is_real = true; | |
1977 | else { | |
1978 | intmax_t t = 10 * i; | |
1979 | ||
1980 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
1981 | is_real = true; | |
1982 | else | |
1983 | i = t - (*c - '0'); | |
1984 | } | |
1985 | } else { | |
1986 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
1987 | is_real = true; | |
1988 | else { | |
1989 | uintmax_t t = 10 * u; | |
1990 | ||
1991 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
1992 | is_real = true; | |
1993 | else | |
1994 | u = t + (*c - '0'); | |
1995 | } | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | x = 10.0 * x + (*c - '0'); | |
2000 | ||
2001 | c++; | |
2002 | } while (strchr("0123456789", *c) && *c != 0); | |
2003 | } | |
2004 | ||
2005 | if (*c == '.') { | |
2006 | is_real = true; | |
2007 | c++; | |
2008 | ||
2009 | if (!strchr("0123456789", *c) || *c == 0) | |
2010 | return -EINVAL; | |
2011 | ||
2012 | do { | |
2013 | y = 10.0 * y + (*c - '0'); | |
2014 | shift = 10.0 * shift; | |
2015 | c++; | |
2016 | } while (strchr("0123456789", *c) && *c != 0); | |
2017 | } | |
2018 | ||
490c5a37 | 2019 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2020 | is_real = true; |
2021 | c++; | |
2022 | ||
2023 | if (*c == '-') { | |
2024 | exponent_negative = true; | |
2025 | c++; | |
2026 | } else if (*c == '+') | |
2027 | c++; | |
2028 | ||
2029 | if (!strchr("0123456789", *c) || *c == 0) | |
2030 | return -EINVAL; | |
2031 | ||
2032 | do { | |
2033 | exponent = 10.0 * exponent + (*c - '0'); | |
2034 | c++; | |
2035 | } while (strchr("0123456789", *c) && *c != 0); | |
2036 | } | |
2037 | ||
2038 | *p = c; | |
2039 | ||
2040 | if (is_real) { | |
2041 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2042 | return JSON_TOKEN_REAL; | |
2043 | } else if (negative) { | |
2044 | ret->integer = i; | |
2045 | return JSON_TOKEN_INTEGER; | |
2046 | } else { | |
2047 | ret->unsig = u; | |
2048 | return JSON_TOKEN_UNSIGNED; | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | int json_tokenize( | |
2053 | const char **p, | |
2054 | char **ret_string, | |
2055 | JsonValue *ret_value, | |
2056 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2057 | unsigned *ret_column, | |
2058 | void **state, | |
2059 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2060 | unsigned *column) { | |
2061 | ||
2062 | unsigned start_line, start_column; | |
2063 | const char *start, *c; | |
2064 | size_t n; | |
2065 | int t, r; | |
2066 | ||
2067 | enum { | |
2068 | STATE_NULL, | |
2069 | STATE_VALUE, | |
2070 | STATE_VALUE_POST, | |
2071 | }; | |
2072 | ||
2073 | assert(p); | |
2074 | assert(*p); | |
2075 | assert(ret_string); | |
2076 | assert(ret_value); | |
2077 | assert(ret_line); | |
2078 | assert(ret_column); | |
2079 | assert(line); | |
2080 | assert(column); | |
2081 | assert(state); | |
2082 | ||
2083 | t = PTR_TO_INT(*state); | |
2084 | if (t == STATE_NULL) { | |
2085 | *line = 1; | |
2086 | *column = 1; | |
2087 | t = STATE_VALUE; | |
2088 | } | |
2089 | ||
2090 | /* Skip over the whitespace */ | |
2091 | n = strspn(*p, WHITESPACE); | |
2092 | inc_lines_columns(line, column, *p, n); | |
2093 | c = *p + n; | |
2094 | ||
2095 | /* Remember where we started processing this token */ | |
2096 | start = c; | |
2097 | start_line = *line; | |
2098 | start_column = *column; | |
2099 | ||
2100 | if (*c == 0) { | |
2101 | *ret_string = NULL; | |
2102 | *ret_value = JSON_VALUE_NULL; | |
2103 | r = JSON_TOKEN_END; | |
2104 | goto finish; | |
2105 | } | |
2106 | ||
2107 | switch (t) { | |
2108 | ||
2109 | case STATE_VALUE: | |
2110 | ||
2111 | if (*c == '{') { | |
2112 | c++; | |
2113 | *state = INT_TO_PTR(STATE_VALUE); | |
2114 | r = JSON_TOKEN_OBJECT_OPEN; | |
2115 | goto null_return; | |
2116 | ||
2117 | } else if (*c == '}') { | |
2118 | c++; | |
2119 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2120 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2121 | goto null_return; | |
2122 | ||
2123 | } else if (*c == '[') { | |
2124 | c++; | |
2125 | *state = INT_TO_PTR(STATE_VALUE); | |
2126 | r = JSON_TOKEN_ARRAY_OPEN; | |
2127 | goto null_return; | |
2128 | ||
2129 | } else if (*c == ']') { | |
2130 | c++; | |
2131 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2132 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2133 | goto null_return; | |
2134 | ||
2135 | } else if (*c == '"') { | |
2136 | ||
2137 | r = json_parse_string(&c, ret_string); | |
2138 | if (r < 0) | |
2139 | return r; | |
2140 | ||
2141 | *ret_value = JSON_VALUE_NULL; | |
2142 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2143 | goto finish; | |
2144 | ||
2145 | } else if (strchr("-0123456789", *c)) { | |
2146 | ||
2147 | r = json_parse_number(&c, ret_value); | |
2148 | if (r < 0) | |
2149 | return r; | |
2150 | ||
2151 | *ret_string = NULL; | |
2152 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2153 | goto finish; | |
2154 | ||
2155 | } else if (startswith(c, "true")) { | |
2156 | *ret_string = NULL; | |
2157 | ret_value->boolean = true; | |
2158 | c += 4; | |
2159 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2160 | r = JSON_TOKEN_BOOLEAN; | |
2161 | goto finish; | |
2162 | ||
2163 | } else if (startswith(c, "false")) { | |
2164 | *ret_string = NULL; | |
2165 | ret_value->boolean = false; | |
2166 | c += 5; | |
2167 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2168 | r = JSON_TOKEN_BOOLEAN; | |
2169 | goto finish; | |
2170 | ||
2171 | } else if (startswith(c, "null")) { | |
2172 | *ret_string = NULL; | |
2173 | *ret_value = JSON_VALUE_NULL; | |
2174 | c += 4; | |
2175 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2176 | r = JSON_TOKEN_NULL; | |
2177 | goto finish; | |
2178 | ||
2179 | } | |
2180 | ||
2181 | return -EINVAL; | |
2182 | ||
2183 | case STATE_VALUE_POST: | |
2184 | ||
2185 | if (*c == ':') { | |
2186 | c++; | |
2187 | *state = INT_TO_PTR(STATE_VALUE); | |
2188 | r = JSON_TOKEN_COLON; | |
2189 | goto null_return; | |
2190 | ||
2191 | } else if (*c == ',') { | |
2192 | c++; | |
2193 | *state = INT_TO_PTR(STATE_VALUE); | |
2194 | r = JSON_TOKEN_COMMA; | |
2195 | goto null_return; | |
2196 | ||
2197 | } else if (*c == '}') { | |
2198 | c++; | |
2199 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2200 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2201 | goto null_return; | |
2202 | ||
2203 | } else if (*c == ']') { | |
2204 | c++; | |
2205 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2206 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2207 | goto null_return; | |
2208 | } | |
2209 | ||
2210 | return -EINVAL; | |
2211 | ||
2212 | default: | |
2213 | assert_not_reached("Unexpected tokenizer state"); | |
2214 | } | |
2215 | ||
2216 | null_return: | |
2217 | *ret_string = NULL; | |
2218 | *ret_value = JSON_VALUE_NULL; | |
2219 | ||
2220 | finish: | |
2221 | inc_lines_columns(line, column, start, c - start); | |
2222 | *p = c; | |
2223 | ||
2224 | *ret_line = start_line; | |
2225 | *ret_column = start_column; | |
2226 | ||
2227 | return r; | |
2228 | } | |
2229 | ||
2230 | typedef enum JsonExpect { | |
2231 | /* The following values are used by json_parse() */ | |
2232 | EXPECT_TOPLEVEL, | |
2233 | EXPECT_END, | |
2234 | EXPECT_OBJECT_FIRST_KEY, | |
2235 | EXPECT_OBJECT_NEXT_KEY, | |
2236 | EXPECT_OBJECT_COLON, | |
2237 | EXPECT_OBJECT_VALUE, | |
2238 | EXPECT_OBJECT_COMMA, | |
2239 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2240 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2241 | EXPECT_ARRAY_COMMA, | |
2242 | ||
2243 | /* And these are used by json_build() */ | |
2244 | EXPECT_ARRAY_ELEMENT, | |
2245 | EXPECT_OBJECT_KEY, | |
2246 | } JsonExpect; | |
2247 | ||
2248 | typedef struct JsonStack { | |
2249 | JsonExpect expect; | |
2250 | JsonVariant **elements; | |
2251 | size_t n_elements, n_elements_allocated; | |
2252 | unsigned line_before; | |
2253 | unsigned column_before; | |
319a4f27 | 2254 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2255 | } JsonStack; |
2256 | ||
2257 | static void json_stack_release(JsonStack *s) { | |
2258 | assert(s); | |
2259 | ||
2260 | json_variant_unref_many(s->elements, s->n_elements); | |
2261 | s->elements = mfree(s->elements); | |
2262 | } | |
2263 | ||
2264 | static int json_parse_internal( | |
2265 | const char **input, | |
2266 | JsonSource *source, | |
2267 | JsonVariant **ret, | |
2268 | unsigned *line, | |
2269 | unsigned *column, | |
2270 | bool continue_end) { | |
2271 | ||
2272 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2273 | unsigned line_buffer = 0, column_buffer = 0; | |
2274 | void *tokenizer_state = NULL; | |
2275 | JsonStack *stack = NULL; | |
2276 | const char *p; | |
2277 | int r; | |
2278 | ||
2279 | assert_return(input, -EINVAL); | |
2280 | assert_return(ret, -EINVAL); | |
2281 | ||
2282 | p = *input; | |
2283 | ||
2284 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2285 | return -ENOMEM; | |
2286 | ||
2287 | stack[0] = (JsonStack) { | |
2288 | .expect = EXPECT_TOPLEVEL, | |
2289 | }; | |
2290 | ||
2291 | if (!line) | |
2292 | line = &line_buffer; | |
2293 | if (!column) | |
2294 | column = &column_buffer; | |
2295 | ||
2296 | for (;;) { | |
2297 | _cleanup_free_ char *string = NULL; | |
2298 | unsigned line_token, column_token; | |
2299 | JsonVariant *add = NULL; | |
2300 | JsonStack *current; | |
2301 | JsonValue value; | |
2302 | int token; | |
2303 | ||
2304 | assert(n_stack > 0); | |
2305 | current = stack + n_stack - 1; | |
2306 | ||
2307 | if (continue_end && current->expect == EXPECT_END) | |
2308 | goto done; | |
2309 | ||
2310 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2311 | if (token < 0) { | |
2312 | r = token; | |
2313 | goto finish; | |
2314 | } | |
2315 | ||
2316 | switch (token) { | |
2317 | ||
2318 | case JSON_TOKEN_END: | |
2319 | if (current->expect != EXPECT_END) { | |
2320 | r = -EINVAL; | |
2321 | goto finish; | |
2322 | } | |
2323 | ||
2324 | assert(current->n_elements == 1); | |
2325 | assert(n_stack == 1); | |
2326 | goto done; | |
2327 | ||
2328 | case JSON_TOKEN_COLON: | |
2329 | ||
2330 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2331 | r = -EINVAL; | |
2332 | goto finish; | |
2333 | } | |
2334 | ||
2335 | current->expect = EXPECT_OBJECT_VALUE; | |
2336 | break; | |
2337 | ||
2338 | case JSON_TOKEN_COMMA: | |
2339 | ||
2340 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2341 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2342 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2343 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2344 | else { | |
2345 | r = -EINVAL; | |
2346 | goto finish; | |
2347 | } | |
2348 | ||
2349 | break; | |
2350 | ||
2351 | case JSON_TOKEN_OBJECT_OPEN: | |
2352 | ||
2353 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2354 | r = -EINVAL; | |
2355 | goto finish; | |
2356 | } | |
2357 | ||
2358 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2359 | r = -ENOMEM; | |
2360 | goto finish; | |
2361 | } | |
2362 | current = stack + n_stack - 1; | |
2363 | ||
2364 | /* Prepare the expect for when we return from the child */ | |
2365 | if (current->expect == EXPECT_TOPLEVEL) | |
2366 | current->expect = EXPECT_END; | |
2367 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2368 | current->expect = EXPECT_OBJECT_COMMA; | |
2369 | else { | |
2370 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2371 | current->expect = EXPECT_ARRAY_COMMA; | |
2372 | } | |
2373 | ||
2374 | stack[n_stack++] = (JsonStack) { | |
2375 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2376 | .line_before = line_token, | |
2377 | .column_before = column_token, | |
2378 | }; | |
2379 | ||
2380 | current = stack + n_stack - 1; | |
2381 | break; | |
2382 | ||
2383 | case JSON_TOKEN_OBJECT_CLOSE: | |
2384 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2385 | r = -EINVAL; | |
2386 | goto finish; | |
2387 | } | |
2388 | ||
2389 | assert(n_stack > 1); | |
2390 | ||
2391 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2392 | if (r < 0) | |
2393 | goto finish; | |
2394 | ||
2395 | line_token = current->line_before; | |
2396 | column_token = current->column_before; | |
2397 | ||
2398 | json_stack_release(current); | |
2399 | n_stack--, current--; | |
2400 | ||
2401 | break; | |
2402 | ||
2403 | case JSON_TOKEN_ARRAY_OPEN: | |
2404 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2405 | r = -EINVAL; | |
2406 | goto finish; | |
2407 | } | |
2408 | ||
2409 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2410 | r = -ENOMEM; | |
2411 | goto finish; | |
2412 | } | |
2413 | current = stack + n_stack - 1; | |
2414 | ||
2415 | /* Prepare the expect for when we return from the child */ | |
2416 | if (current->expect == EXPECT_TOPLEVEL) | |
2417 | current->expect = EXPECT_END; | |
2418 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2419 | current->expect = EXPECT_OBJECT_COMMA; | |
2420 | else { | |
2421 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2422 | current->expect = EXPECT_ARRAY_COMMA; | |
2423 | } | |
2424 | ||
2425 | stack[n_stack++] = (JsonStack) { | |
2426 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2427 | .line_before = line_token, | |
2428 | .column_before = column_token, | |
2429 | }; | |
2430 | ||
2431 | break; | |
2432 | ||
2433 | case JSON_TOKEN_ARRAY_CLOSE: | |
2434 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2435 | r = -EINVAL; | |
2436 | goto finish; | |
2437 | } | |
2438 | ||
2439 | assert(n_stack > 1); | |
2440 | ||
2441 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2442 | if (r < 0) | |
2443 | goto finish; | |
2444 | ||
2445 | line_token = current->line_before; | |
2446 | column_token = current->column_before; | |
2447 | ||
2448 | json_stack_release(current); | |
2449 | n_stack--, current--; | |
2450 | break; | |
2451 | ||
2452 | case JSON_TOKEN_STRING: | |
2453 | 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)) { | |
2454 | r = -EINVAL; | |
2455 | goto finish; | |
2456 | } | |
2457 | ||
2458 | r = json_variant_new_string(&add, string); | |
2459 | if (r < 0) | |
2460 | goto finish; | |
2461 | ||
2462 | if (current->expect == EXPECT_TOPLEVEL) | |
2463 | current->expect = EXPECT_END; | |
2464 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
2465 | current->expect = EXPECT_OBJECT_COLON; | |
2466 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2467 | current->expect = EXPECT_OBJECT_COMMA; | |
2468 | else { | |
2469 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2470 | current->expect = EXPECT_ARRAY_COMMA; | |
2471 | } | |
2472 | ||
2473 | break; | |
2474 | ||
2475 | case JSON_TOKEN_REAL: | |
2476 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2477 | r = -EINVAL; | |
2478 | goto finish; | |
2479 | } | |
2480 | ||
2481 | r = json_variant_new_real(&add, value.real); | |
2482 | if (r < 0) | |
2483 | goto finish; | |
2484 | ||
2485 | if (current->expect == EXPECT_TOPLEVEL) | |
2486 | current->expect = EXPECT_END; | |
2487 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2488 | current->expect = EXPECT_OBJECT_COMMA; | |
2489 | else { | |
2490 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2491 | current->expect = EXPECT_ARRAY_COMMA; | |
2492 | } | |
2493 | ||
2494 | break; | |
2495 | ||
2496 | case JSON_TOKEN_INTEGER: | |
2497 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2498 | r = -EINVAL; | |
2499 | goto finish; | |
2500 | } | |
2501 | ||
2502 | r = json_variant_new_integer(&add, value.integer); | |
2503 | if (r < 0) | |
2504 | goto finish; | |
2505 | ||
2506 | if (current->expect == EXPECT_TOPLEVEL) | |
2507 | current->expect = EXPECT_END; | |
2508 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2509 | current->expect = EXPECT_OBJECT_COMMA; | |
2510 | else { | |
2511 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2512 | current->expect = EXPECT_ARRAY_COMMA; | |
2513 | } | |
2514 | ||
2515 | break; | |
2516 | ||
2517 | case JSON_TOKEN_UNSIGNED: | |
2518 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2519 | r = -EINVAL; | |
2520 | goto finish; | |
2521 | } | |
2522 | ||
2523 | r = json_variant_new_unsigned(&add, value.unsig); | |
2524 | if (r < 0) | |
2525 | goto finish; | |
2526 | ||
2527 | if (current->expect == EXPECT_TOPLEVEL) | |
2528 | current->expect = EXPECT_END; | |
2529 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2530 | current->expect = EXPECT_OBJECT_COMMA; | |
2531 | else { | |
2532 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2533 | current->expect = EXPECT_ARRAY_COMMA; | |
2534 | } | |
2535 | ||
2536 | break; | |
2537 | ||
2538 | case JSON_TOKEN_BOOLEAN: | |
2539 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2540 | r = -EINVAL; | |
2541 | goto finish; | |
2542 | } | |
2543 | ||
2544 | r = json_variant_new_boolean(&add, value.boolean); | |
2545 | if (r < 0) | |
2546 | goto finish; | |
2547 | ||
2548 | if (current->expect == EXPECT_TOPLEVEL) | |
2549 | current->expect = EXPECT_END; | |
2550 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2551 | current->expect = EXPECT_OBJECT_COMMA; | |
2552 | else { | |
2553 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2554 | current->expect = EXPECT_ARRAY_COMMA; | |
2555 | } | |
2556 | ||
2557 | break; | |
2558 | ||
2559 | case JSON_TOKEN_NULL: | |
2560 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2561 | r = -EINVAL; | |
2562 | goto finish; | |
2563 | } | |
2564 | ||
2565 | r = json_variant_new_null(&add); | |
2566 | if (r < 0) | |
2567 | goto finish; | |
2568 | ||
2569 | if (current->expect == EXPECT_TOPLEVEL) | |
2570 | current->expect = EXPECT_END; | |
2571 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2572 | current->expect = EXPECT_OBJECT_COMMA; | |
2573 | else { | |
2574 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2575 | current->expect = EXPECT_ARRAY_COMMA; | |
2576 | } | |
2577 | ||
2578 | break; | |
2579 | ||
2580 | default: | |
2581 | assert_not_reached("Unexpected token"); | |
2582 | } | |
2583 | ||
2584 | if (add) { | |
2585 | (void) json_variant_set_source(&add, source, line_token, column_token); | |
2586 | ||
2587 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
2588 | r = -ENOMEM; | |
2589 | goto finish; | |
2590 | } | |
2591 | ||
2592 | current->elements[current->n_elements++] = add; | |
2593 | } | |
2594 | } | |
2595 | ||
2596 | done: | |
2597 | assert(n_stack == 1); | |
2598 | assert(stack[0].n_elements == 1); | |
2599 | ||
2600 | *ret = json_variant_ref(stack[0].elements[0]); | |
2601 | *input = p; | |
2602 | r = 0; | |
2603 | ||
2604 | finish: | |
2605 | for (i = 0; i < n_stack; i++) | |
2606 | json_stack_release(stack + i); | |
2607 | ||
2608 | free(stack); | |
2609 | ||
2610 | return r; | |
2611 | } | |
2612 | ||
2613 | int json_parse(const char *input, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2614 | return json_parse_internal(&input, NULL, ret, ret_line, ret_column, false); | |
2615 | } | |
2616 | ||
2617 | int json_parse_continue(const char **p, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2618 | return json_parse_internal(p, NULL, ret, ret_line, ret_column, true); | |
2619 | } | |
2620 | ||
2621 | int json_parse_file(FILE *f, const char *path, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2622 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; | |
2623 | _cleanup_free_ char *text = NULL; | |
2624 | const char *p; | |
2625 | int r; | |
2626 | ||
2627 | if (f) | |
2628 | r = read_full_stream(f, &text, NULL); | |
2629 | else if (path) | |
2630 | r = read_full_file(path, &text, NULL); | |
2631 | else | |
2632 | return -EINVAL; | |
2633 | if (r < 0) | |
2634 | return r; | |
2635 | ||
2636 | if (path) { | |
2637 | source = json_source_new(path); | |
2638 | if (!source) | |
2639 | return -ENOMEM; | |
2640 | } | |
2641 | ||
2642 | p = text; | |
2643 | return json_parse_internal(&p, source, ret, ret_line, ret_column, false); | |
2644 | } | |
2645 | ||
2646 | int json_buildv(JsonVariant **ret, va_list ap) { | |
2647 | JsonStack *stack = NULL; | |
2648 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2649 | int r; | |
2650 | ||
2651 | assert_return(ret, -EINVAL); | |
2652 | ||
2653 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2654 | return -ENOMEM; | |
2655 | ||
2656 | stack[0] = (JsonStack) { | |
2657 | .expect = EXPECT_TOPLEVEL, | |
2658 | }; | |
2659 | ||
2660 | for (;;) { | |
fcadf032 | 2661 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
2662 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
2663 | * have been added to the current variant */ | |
cd0b6c53 LP |
2664 | JsonStack *current; |
2665 | int command; | |
2666 | ||
2667 | assert(n_stack > 0); | |
2668 | current = stack + n_stack - 1; | |
2669 | ||
2670 | if (current->expect == EXPECT_END) | |
2671 | goto done; | |
2672 | ||
2673 | command = va_arg(ap, int); | |
2674 | ||
2675 | switch (command) { | |
2676 | ||
2677 | case _JSON_BUILD_STRING: { | |
2678 | const char *p; | |
2679 | ||
2680 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2681 | r = -EINVAL; | |
2682 | goto finish; | |
2683 | } | |
2684 | ||
2685 | p = va_arg(ap, const char *); | |
2686 | ||
319a4f27 LP |
2687 | if (current->n_suppress == 0) { |
2688 | r = json_variant_new_string(&add, p); | |
2689 | if (r < 0) | |
2690 | goto finish; | |
2691 | } | |
2692 | ||
2693 | n_subtract = 1; | |
cd0b6c53 LP |
2694 | |
2695 | if (current->expect == EXPECT_TOPLEVEL) | |
2696 | current->expect = EXPECT_END; | |
2697 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2698 | current->expect = EXPECT_OBJECT_KEY; | |
2699 | else | |
2700 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2701 | ||
2702 | break; | |
2703 | } | |
2704 | ||
2705 | case _JSON_BUILD_INTEGER: { | |
2706 | intmax_t j; | |
2707 | ||
2708 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2709 | r = -EINVAL; | |
2710 | goto finish; | |
2711 | } | |
2712 | ||
2713 | j = va_arg(ap, intmax_t); | |
2714 | ||
319a4f27 LP |
2715 | if (current->n_suppress == 0) { |
2716 | r = json_variant_new_integer(&add, j); | |
2717 | if (r < 0) | |
2718 | goto finish; | |
2719 | } | |
2720 | ||
2721 | n_subtract = 1; | |
cd0b6c53 LP |
2722 | |
2723 | if (current->expect == EXPECT_TOPLEVEL) | |
2724 | current->expect = EXPECT_END; | |
2725 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2726 | current->expect = EXPECT_OBJECT_KEY; | |
2727 | else | |
2728 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2729 | ||
2730 | break; | |
2731 | } | |
2732 | ||
2733 | case _JSON_BUILD_UNSIGNED: { | |
2734 | uintmax_t j; | |
2735 | ||
2736 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2737 | r = -EINVAL; | |
2738 | goto finish; | |
2739 | } | |
2740 | ||
2741 | j = va_arg(ap, uintmax_t); | |
2742 | ||
319a4f27 LP |
2743 | if (current->n_suppress == 0) { |
2744 | r = json_variant_new_unsigned(&add, j); | |
2745 | if (r < 0) | |
2746 | goto finish; | |
2747 | } | |
2748 | ||
2749 | n_subtract = 1; | |
cd0b6c53 LP |
2750 | |
2751 | if (current->expect == EXPECT_TOPLEVEL) | |
2752 | current->expect = EXPECT_END; | |
2753 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2754 | current->expect = EXPECT_OBJECT_KEY; | |
2755 | else | |
2756 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2757 | ||
2758 | break; | |
2759 | } | |
2760 | ||
2761 | case _JSON_BUILD_REAL: { | |
2762 | long double d; | |
2763 | ||
2764 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2765 | r = -EINVAL; | |
2766 | goto finish; | |
2767 | } | |
2768 | ||
2769 | d = va_arg(ap, long double); | |
2770 | ||
319a4f27 LP |
2771 | if (current->n_suppress == 0) { |
2772 | r = json_variant_new_real(&add, d); | |
2773 | if (r < 0) | |
2774 | goto finish; | |
2775 | } | |
2776 | ||
2777 | n_subtract = 1; | |
cd0b6c53 LP |
2778 | |
2779 | if (current->expect == EXPECT_TOPLEVEL) | |
2780 | current->expect = EXPECT_END; | |
2781 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2782 | current->expect = EXPECT_OBJECT_KEY; | |
2783 | else | |
2784 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2785 | ||
2786 | break; | |
2787 | } | |
2788 | ||
2789 | case _JSON_BUILD_BOOLEAN: { | |
2790 | bool b; | |
2791 | ||
2792 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2793 | r = -EINVAL; | |
2794 | goto finish; | |
2795 | } | |
2796 | ||
2797 | b = va_arg(ap, int); | |
2798 | ||
319a4f27 LP |
2799 | if (current->n_suppress == 0) { |
2800 | r = json_variant_new_boolean(&add, b); | |
2801 | if (r < 0) | |
2802 | goto finish; | |
2803 | } | |
2804 | ||
2805 | n_subtract = 1; | |
cd0b6c53 LP |
2806 | |
2807 | if (current->expect == EXPECT_TOPLEVEL) | |
2808 | current->expect = EXPECT_END; | |
2809 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2810 | current->expect = EXPECT_OBJECT_KEY; | |
2811 | else | |
2812 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2813 | ||
2814 | break; | |
2815 | } | |
2816 | ||
2817 | case _JSON_BUILD_NULL: | |
2818 | ||
2819 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2820 | r = -EINVAL; | |
2821 | goto finish; | |
2822 | } | |
2823 | ||
319a4f27 LP |
2824 | if (current->n_suppress == 0) { |
2825 | r = json_variant_new_null(&add); | |
2826 | if (r < 0) | |
2827 | goto finish; | |
2828 | } | |
2829 | ||
2830 | n_subtract = 1; | |
cd0b6c53 LP |
2831 | |
2832 | if (current->expect == EXPECT_TOPLEVEL) | |
2833 | current->expect = EXPECT_END; | |
2834 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2835 | current->expect = EXPECT_OBJECT_KEY; | |
2836 | else | |
2837 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2838 | ||
2839 | break; | |
2840 | ||
2841 | case _JSON_BUILD_VARIANT: | |
2842 | ||
2843 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2844 | r = -EINVAL; | |
2845 | goto finish; | |
2846 | } | |
2847 | ||
319a4f27 LP |
2848 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
2849 | * allocated anyway... */ | |
cd0b6c53 LP |
2850 | add = va_arg(ap, JsonVariant*); |
2851 | if (!add) | |
2852 | add = JSON_VARIANT_MAGIC_NULL; | |
2853 | else | |
2854 | json_variant_ref(add); | |
2855 | ||
319a4f27 LP |
2856 | n_subtract = 1; |
2857 | ||
cd0b6c53 LP |
2858 | if (current->expect == EXPECT_TOPLEVEL) |
2859 | current->expect = EXPECT_END; | |
2860 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2861 | current->expect = EXPECT_OBJECT_KEY; | |
2862 | else | |
2863 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2864 | ||
2865 | break; | |
2866 | ||
2867 | case _JSON_BUILD_LITERAL: { | |
2868 | const char *l; | |
2869 | ||
2870 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2871 | r = -EINVAL; | |
2872 | goto finish; | |
2873 | } | |
2874 | ||
2875 | l = va_arg(ap, const char *); | |
2876 | ||
319a4f27 LP |
2877 | if (l) { |
2878 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
2879 | * errors even in suppressed object properties */ | |
2880 | ||
cd0b6c53 LP |
2881 | r = json_parse(l, &add, NULL, NULL); |
2882 | if (r < 0) | |
2883 | goto finish; | |
319a4f27 LP |
2884 | } else |
2885 | add = JSON_VARIANT_MAGIC_NULL; | |
2886 | ||
2887 | n_subtract = 1; | |
cd0b6c53 LP |
2888 | |
2889 | if (current->expect == EXPECT_TOPLEVEL) | |
2890 | current->expect = EXPECT_END; | |
2891 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2892 | current->expect = EXPECT_OBJECT_KEY; | |
2893 | else | |
2894 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2895 | ||
2896 | break; | |
2897 | } | |
2898 | ||
2899 | case _JSON_BUILD_ARRAY_BEGIN: | |
2900 | ||
2901 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2902 | r = -EINVAL; | |
2903 | goto finish; | |
2904 | } | |
2905 | ||
2906 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2907 | r = -ENOMEM; | |
2908 | goto finish; | |
2909 | } | |
2910 | current = stack + n_stack - 1; | |
2911 | ||
2912 | if (current->expect == EXPECT_TOPLEVEL) | |
2913 | current->expect = EXPECT_END; | |
2914 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2915 | current->expect = EXPECT_OBJECT_KEY; | |
2916 | else | |
2917 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2918 | ||
2919 | stack[n_stack++] = (JsonStack) { | |
2920 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
2921 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
2922 | * new array, then we should | |
2923 | * also suppress all array | |
2924 | * members */ | |
cd0b6c53 LP |
2925 | }; |
2926 | ||
2927 | break; | |
2928 | ||
2929 | case _JSON_BUILD_ARRAY_END: | |
2930 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
2931 | r = -EINVAL; | |
2932 | goto finish; | |
2933 | } | |
2934 | ||
2935 | assert(n_stack > 1); | |
2936 | ||
319a4f27 LP |
2937 | if (current->n_suppress == 0) { |
2938 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2939 | if (r < 0) | |
2940 | goto finish; | |
2941 | } | |
2942 | ||
2943 | n_subtract = 1; | |
cd0b6c53 LP |
2944 | |
2945 | json_stack_release(current); | |
2946 | n_stack--, current--; | |
2947 | ||
2948 | break; | |
2949 | ||
2950 | case _JSON_BUILD_STRV: { | |
2951 | char **l; | |
2952 | ||
2953 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2954 | r = -EINVAL; | |
2955 | goto finish; | |
2956 | } | |
2957 | ||
2958 | l = va_arg(ap, char **); | |
2959 | ||
319a4f27 LP |
2960 | if (current->n_suppress == 0) { |
2961 | r = json_variant_new_array_strv(&add, l); | |
2962 | if (r < 0) | |
2963 | goto finish; | |
2964 | } | |
2965 | ||
2966 | n_subtract = 1; | |
cd0b6c53 LP |
2967 | |
2968 | if (current->expect == EXPECT_TOPLEVEL) | |
2969 | current->expect = EXPECT_END; | |
2970 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2971 | current->expect = EXPECT_OBJECT_KEY; | |
2972 | else | |
2973 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2974 | ||
2975 | break; | |
2976 | } | |
2977 | ||
2978 | case _JSON_BUILD_OBJECT_BEGIN: | |
2979 | ||
2980 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2981 | r = -EINVAL; | |
2982 | goto finish; | |
2983 | } | |
2984 | ||
2985 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2986 | r = -ENOMEM; | |
2987 | goto finish; | |
2988 | } | |
2989 | current = stack + n_stack - 1; | |
2990 | ||
2991 | if (current->expect == EXPECT_TOPLEVEL) | |
2992 | current->expect = EXPECT_END; | |
2993 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2994 | current->expect = EXPECT_OBJECT_KEY; | |
2995 | else | |
2996 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2997 | ||
2998 | stack[n_stack++] = (JsonStack) { | |
2999 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
3000 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3001 | * new object, then we should | |
3002 | * also suppress all object | |
3003 | * members */ | |
cd0b6c53 LP |
3004 | }; |
3005 | ||
3006 | break; | |
3007 | ||
3008 | case _JSON_BUILD_OBJECT_END: | |
3009 | ||
3010 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3011 | r = -EINVAL; | |
3012 | goto finish; | |
3013 | } | |
3014 | ||
3015 | assert(n_stack > 1); | |
3016 | ||
319a4f27 LP |
3017 | if (current->n_suppress == 0) { |
3018 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3019 | if (r < 0) | |
3020 | goto finish; | |
3021 | } | |
3022 | ||
3023 | n_subtract = 1; | |
cd0b6c53 LP |
3024 | |
3025 | json_stack_release(current); | |
3026 | n_stack--, current--; | |
3027 | ||
3028 | break; | |
3029 | ||
3030 | case _JSON_BUILD_PAIR: { | |
3031 | const char *n; | |
3032 | ||
3033 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3034 | r = -EINVAL; | |
3035 | goto finish; | |
3036 | } | |
3037 | ||
3038 | n = va_arg(ap, const char *); | |
3039 | ||
319a4f27 LP |
3040 | if (current->n_suppress == 0) { |
3041 | r = json_variant_new_string(&add, n); | |
3042 | if (r < 0) | |
3043 | goto finish; | |
3044 | } | |
3045 | ||
3046 | n_subtract = 1; | |
3047 | ||
3048 | current->expect = EXPECT_OBJECT_VALUE; | |
3049 | break; | |
3050 | } | |
3051 | ||
3052 | case _JSON_BUILD_PAIR_CONDITION: { | |
3053 | const char *n; | |
3054 | bool b; | |
3055 | ||
3056 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3057 | r = -EINVAL; | |
cd0b6c53 | 3058 | goto finish; |
319a4f27 LP |
3059 | } |
3060 | ||
3061 | b = va_arg(ap, int); | |
3062 | n = va_arg(ap, const char *); | |
3063 | ||
3064 | if (b && current->n_suppress == 0) { | |
3065 | r = json_variant_new_string(&add, n); | |
3066 | if (r < 0) | |
3067 | goto finish; | |
3068 | } | |
3069 | ||
3070 | n_subtract = 1; /* we generated one item */ | |
3071 | ||
3072 | if (!b && current->n_suppress != (size_t) -1) | |
3073 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3074 | |
3075 | current->expect = EXPECT_OBJECT_VALUE; | |
3076 | break; | |
3077 | }} | |
3078 | ||
319a4f27 LP |
3079 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3080 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3081 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3082 | r = -ENOMEM; | |
3083 | goto finish; | |
3084 | } | |
3085 | ||
fcadf032 | 3086 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3087 | } |
319a4f27 LP |
3088 | |
3089 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3090 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3091 | * on this stack level */ | |
3092 | if (current->n_suppress != (size_t) -1) { | |
3093 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3094 | current->n_suppress = 0; | |
3095 | else | |
3096 | current->n_suppress -= n_subtract; | |
3097 | } | |
cd0b6c53 LP |
3098 | } |
3099 | ||
3100 | done: | |
3101 | assert(n_stack == 1); | |
3102 | assert(stack[0].n_elements == 1); | |
3103 | ||
3104 | *ret = json_variant_ref(stack[0].elements[0]); | |
3105 | r = 0; | |
3106 | ||
3107 | finish: | |
3108 | for (i = 0; i < n_stack; i++) | |
3109 | json_stack_release(stack + i); | |
3110 | ||
3111 | free(stack); | |
3112 | ||
cd0b6c53 LP |
3113 | return r; |
3114 | } | |
3115 | ||
3116 | int json_build(JsonVariant **ret, ...) { | |
3117 | va_list ap; | |
3118 | int r; | |
3119 | ||
3120 | va_start(ap, ret); | |
3121 | r = json_buildv(ret, ap); | |
3122 | va_end(ap); | |
3123 | ||
3124 | return r; | |
3125 | } | |
3126 | ||
3127 | int json_log_internal( | |
3128 | JsonVariant *variant, | |
3129 | int level, | |
3130 | int error, | |
3131 | const char *file, | |
3132 | int line, | |
3133 | const char *func, | |
3134 | const char *format, ...) { | |
3135 | ||
3136 | PROTECT_ERRNO; | |
3137 | ||
3138 | unsigned source_line, source_column; | |
3139 | char buffer[LINE_MAX]; | |
3140 | const char *source; | |
3141 | va_list ap; | |
3142 | int r; | |
3143 | ||
fc0f6fbf | 3144 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3145 | |
3146 | va_start(ap, format); | |
3147 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3148 | va_end(ap); | |
3149 | ||
3150 | if (variant) { | |
3151 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3152 | if (r < 0) | |
3153 | return r; | |
3154 | } else { | |
3155 | source = NULL; | |
3156 | source_line = 0; | |
3157 | source_column = 0; | |
3158 | } | |
3159 | ||
3160 | if (source && source_line > 0 && source_column > 0) | |
3161 | return log_struct_internal( | |
3162 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3163 | error, | |
3164 | file, line, func, | |
3165 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3166 | "CONFIG_FILE=%s", source, | |
3167 | "CONFIG_LINE=%u", source_line, | |
3168 | "CONFIG_COLUMN=%u", source_column, | |
13a16a2b | 3169 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
cd0b6c53 LP |
3170 | NULL); |
3171 | else | |
3172 | return log_struct_internal( | |
3173 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3174 | error, | |
3175 | file, line, func, | |
3176 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3177 | LOG_MESSAGE("%s", buffer), | |
3178 | NULL); | |
3179 | } | |
3180 | ||
3181 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3182 | const JsonDispatch *p; | |
3183 | size_t i, n, m; | |
3184 | int r, done = 0; | |
3185 | bool *found; | |
3186 | ||
3187 | if (!json_variant_is_object(v)) { | |
3188 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3189 | ||
3190 | if (flags & JSON_PERMISSIVE) | |
3191 | return 0; | |
3192 | ||
3193 | return -EINVAL; | |
3194 | } | |
3195 | ||
3196 | for (p = table, m = 0; p->name; p++) | |
3197 | m++; | |
3198 | ||
3199 | found = newa0(bool, m); | |
3200 | ||
3201 | n = json_variant_elements(v); | |
3202 | for (i = 0; i < n; i += 2) { | |
3203 | JsonVariant *key, *value; | |
3204 | ||
3205 | assert_se(key = json_variant_by_index(v, i)); | |
3206 | assert_se(value = json_variant_by_index(v, i+1)); | |
3207 | ||
3208 | for (p = table; p->name; p++) | |
3209 | if (p->name == (const char*) -1 || | |
3210 | streq_ptr(json_variant_string(key), p->name)) | |
3211 | break; | |
3212 | ||
3213 | if (p->name) { /* Found a matching entry! :-) */ | |
3214 | JsonDispatchFlags merged_flags; | |
3215 | ||
3216 | merged_flags = flags | p->flags; | |
3217 | ||
3218 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3219 | !json_variant_has_type(value, p->type)) { | |
3220 | ||
3221 | json_log(value, merged_flags, 0, | |
3222 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3223 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3224 | ||
3225 | if (merged_flags & JSON_PERMISSIVE) | |
3226 | continue; | |
3227 | ||
3228 | return -EINVAL; | |
3229 | } | |
3230 | ||
3231 | if (found[p-table]) { | |
3232 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3233 | ||
3234 | if (merged_flags & JSON_PERMISSIVE) | |
3235 | continue; | |
3236 | ||
3237 | return -ENOTUNIQ; | |
3238 | } | |
3239 | ||
3240 | found[p-table] = true; | |
3241 | ||
3242 | if (p->callback) { | |
3243 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3244 | if (r < 0) { | |
3245 | if (merged_flags & JSON_PERMISSIVE) | |
3246 | continue; | |
3247 | ||
3248 | return r; | |
3249 | } | |
3250 | } | |
3251 | ||
3252 | done ++; | |
3253 | ||
3254 | } else { /* Didn't find a matching entry! :-( */ | |
3255 | ||
3256 | if (bad) { | |
3257 | r = bad(json_variant_string(key), value, flags, userdata); | |
3258 | if (r < 0) { | |
3259 | if (flags & JSON_PERMISSIVE) | |
3260 | continue; | |
3261 | ||
3262 | return r; | |
3263 | } else | |
3264 | done ++; | |
3265 | ||
3266 | } else { | |
3267 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3268 | ||
3269 | if (flags & JSON_PERMISSIVE) | |
3270 | continue; | |
3271 | ||
3272 | return -EADDRNOTAVAIL; | |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | for (p = table; p->name; p++) { | |
3278 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3279 | ||
3280 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3281 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3282 | ||
3283 | if ((merged_flags & JSON_PERMISSIVE)) | |
3284 | continue; | |
3285 | ||
3286 | return -ENXIO; | |
3287 | } | |
3288 | } | |
3289 | ||
3290 | return done; | |
3291 | } | |
3292 | ||
3293 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3294 | bool *b = userdata; | |
3295 | ||
3296 | assert(variant); | |
3297 | assert(b); | |
3298 | ||
3299 | if (!json_variant_is_boolean(variant)) { | |
3300 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3301 | return -EINVAL; | |
3302 | } | |
3303 | ||
3304 | *b = json_variant_boolean(variant); | |
3305 | return 0; | |
3306 | } | |
3307 | ||
3308 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3309 | int *b = userdata; | |
3310 | ||
3311 | assert(variant); | |
3312 | assert(b); | |
3313 | ||
3314 | if (!json_variant_is_boolean(variant)) { | |
3315 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3316 | return -EINVAL; | |
3317 | } | |
3318 | ||
3319 | *b = json_variant_boolean(variant); | |
3320 | return 0; | |
3321 | } | |
3322 | ||
3323 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3324 | intmax_t *i = userdata; | |
3325 | ||
3326 | assert(variant); | |
3327 | assert(i); | |
3328 | ||
3329 | if (!json_variant_is_integer(variant)) { | |
3330 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3331 | return -EINVAL; | |
3332 | } | |
3333 | ||
3334 | *i = json_variant_integer(variant); | |
3335 | return 0; | |
3336 | } | |
3337 | ||
3338 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3339 | uintmax_t *u = userdata; | |
3340 | ||
3341 | assert(variant); | |
3342 | assert(u); | |
3343 | ||
3344 | if (!json_variant_is_unsigned(variant)) { | |
3345 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3346 | return -EINVAL; | |
3347 | } | |
3348 | ||
3349 | *u = json_variant_unsigned(variant); | |
3350 | return 0; | |
3351 | } | |
3352 | ||
3353 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3354 | uint32_t *u = userdata; | |
3355 | ||
3356 | assert(variant); | |
3357 | assert(u); | |
3358 | ||
3359 | if (!json_variant_is_unsigned(variant)) { | |
3360 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3361 | return -EINVAL; | |
3362 | } | |
3363 | ||
3364 | if (json_variant_unsigned(variant) > UINT32_MAX) { | |
3365 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3366 | return -ERANGE; | |
3367 | } | |
3368 | ||
3369 | *u = (uint32_t) json_variant_unsigned(variant); | |
3370 | return 0; | |
3371 | } | |
3372 | ||
3373 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3374 | int32_t *i = userdata; | |
3375 | ||
3376 | assert(variant); | |
3377 | assert(i); | |
3378 | ||
3379 | if (!json_variant_is_integer(variant)) { | |
3380 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3381 | return -EINVAL; | |
3382 | } | |
3383 | ||
3384 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) { | |
3385 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3386 | return -ERANGE; | |
3387 | } | |
3388 | ||
3389 | *i = (int32_t) json_variant_integer(variant); | |
3390 | return 0; | |
3391 | } | |
3392 | ||
3393 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3394 | char **s = userdata; | |
3395 | int r; | |
3396 | ||
3397 | assert(variant); | |
3398 | assert(s); | |
3399 | ||
3400 | if (json_variant_is_null(variant)) { | |
3401 | *s = mfree(*s); | |
3402 | return 0; | |
3403 | } | |
3404 | ||
3405 | if (!json_variant_is_string(variant)) { | |
3406 | json_log(variant, flags, 0, "JSON field '%s' is not a string.", strna(name)); | |
3407 | return -EINVAL; | |
3408 | } | |
3409 | ||
3410 | r = free_and_strdup(s, json_variant_string(variant)); | |
3411 | if (r < 0) | |
3412 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
3413 | ||
3414 | return 0; | |
3415 | } | |
3416 | ||
3417 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3418 | _cleanup_strv_free_ char **l = NULL; | |
3419 | char ***s = userdata; | |
3420 | size_t i; | |
3421 | int r; | |
3422 | ||
3423 | assert(variant); | |
3424 | assert(s); | |
3425 | ||
3426 | if (json_variant_is_null(variant)) { | |
3427 | *s = strv_free(*s); | |
3428 | return 0; | |
3429 | } | |
3430 | ||
3431 | if (!json_variant_is_array(variant)) { | |
3432 | json_log(variant, 0, flags, "JSON field '%s' is not an array.", strna(name)); | |
3433 | return -EINVAL; | |
3434 | } | |
3435 | ||
3436 | for (i = 0; i < json_variant_elements(variant); i++) { | |
3437 | JsonVariant *e; | |
3438 | ||
3439 | assert_se(e = json_variant_by_index(variant, i)); | |
3440 | ||
3441 | if (!json_variant_is_string(e)) { | |
3442 | json_log(e, 0, flags, "JSON array element is not a string."); | |
3443 | return -EINVAL; | |
3444 | } | |
3445 | ||
3446 | r = strv_extend(&l, json_variant_string(e)); | |
3447 | if (r < 0) | |
3448 | return json_log(variant, flags, r, "Failed to append array element: %m"); | |
3449 | } | |
3450 | ||
3451 | strv_free_and_replace(*s, l); | |
3452 | return 0; | |
3453 | } | |
3454 | ||
3455 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3456 | JsonVariant **p = userdata; | |
3457 | ||
3458 | assert(variant); | |
3459 | assert(p); | |
3460 | ||
3461 | json_variant_unref(*p); | |
3462 | *p = json_variant_ref(variant); | |
3463 | ||
3464 | return 0; | |
3465 | } | |
3466 | ||
3467 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { | |
3468 | [JSON_VARIANT_STRING] = "string", | |
3469 | [JSON_VARIANT_INTEGER] = "integer", | |
3470 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
3471 | [JSON_VARIANT_REAL] = "real", | |
3472 | [JSON_VARIANT_NUMBER] = "number", | |
3473 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
3474 | [JSON_VARIANT_ARRAY] = "array", | |
3475 | [JSON_VARIANT_OBJECT] = "object", | |
3476 | [JSON_VARIANT_NULL] = "null", | |
3477 | }; | |
3478 | ||
3479 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |