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cd0b6c53 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #include <errno.h> | |
ca78ad1d | 4 | #include <locale.h> |
cd0b6c53 LP |
5 | #include <math.h> |
6 | #include <stdarg.h> | |
7 | #include <stdio_ext.h> | |
8 | #include <stdlib.h> | |
9 | #include <string.h> | |
10 | #include <sys/types.h> | |
11 | ||
12 | #include "sd-messages.h" | |
13 | ||
14 | #include "alloc-util.h" | |
2b2fec7d | 15 | #include "errno-util.h" |
cd0b6c53 LP |
16 | #include "fd-util.h" |
17 | #include "fileio.h" | |
18 | #include "float.h" | |
19 | #include "hexdecoct.h" | |
20 | #include "json-internal.h" | |
21 | #include "json.h" | |
22 | #include "macro.h" | |
0a970718 | 23 | #include "memory-util.h" |
cd0b6c53 LP |
24 | #include "string-table.h" |
25 | #include "string-util.h" | |
26 | #include "strv.h" | |
27 | #include "terminal-util.h" | |
28 | #include "utf8.h" | |
29 | ||
d4a389eb | 30 | /* Refuse putting together variants with a larger depth than 4K by default (as a protection against overflowing stacks |
b2fa0d4f | 31 | * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this |
d4a389eb YW |
32 | * remains under 2^16. |
33 | * The value was 16k, but it was discovered to be too high on llvm/x86-64. See also the issue #10738. */ | |
34 | #define DEPTH_MAX (4U*1024U) | |
b2fa0d4f LP |
35 | assert_cc(DEPTH_MAX <= UINT16_MAX); |
36 | ||
cd0b6c53 LP |
37 | typedef struct JsonSource { |
38 | /* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */ | |
39 | size_t n_ref; | |
40 | unsigned max_line; | |
41 | unsigned max_column; | |
42 | char name[]; | |
43 | } JsonSource; | |
44 | ||
45 | /* On x86-64 this whole structure should have a size of 6 * 64 bit = 48 bytes */ | |
46 | struct JsonVariant { | |
47 | union { | |
48 | /* We either maintain a reference counter for this variant itself, or we are embedded into an | |
49 | * array/object, in which case only that surrounding object is ref-counted. (If 'embedded' is false, | |
50 | * see below.) */ | |
51 | size_t n_ref; | |
52 | ||
53 | /* If this JsonVariant is part of an array/object, then this field points to the surrounding | |
54 | * JSON_VARIANT_ARRAY/JSON_VARIANT_OBJECT object. (If 'embedded' is true, see below.) */ | |
55 | JsonVariant *parent; | |
56 | }; | |
57 | ||
a7efb030 LP |
58 | /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */ |
59 | JsonSource *source; | |
60 | unsigned line, column; | |
61 | ||
cd0b6c53 LP |
62 | JsonVariantType type:5; |
63 | ||
64 | /* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above | |
65 | * is valid. If false, the 'n_ref' field above is valid instead. */ | |
66 | bool is_embedded:1; | |
67 | ||
68 | /* In some conditions (for example, if this object is part of an array of strings or objects), we don't store | |
69 | * any data inline, but instead simply reference an external object and act as surrogate of it. In that case | |
70 | * this bool is set, and the external object is referenced through the .reference field below. */ | |
71 | bool is_reference:1; | |
72 | ||
73 | /* While comparing two arrays, we use this for marking what we already have seen */ | |
74 | bool is_marked:1; | |
75 | ||
b2fa0d4f LP |
76 | /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */ |
77 | uint16_t depth; | |
cd0b6c53 LP |
78 | |
79 | union { | |
80 | /* For simple types we store the value in-line. */ | |
81 | JsonValue value; | |
82 | ||
83 | /* For objects and arrays we store the number of elements immediately following */ | |
84 | size_t n_elements; | |
85 | ||
86 | /* If is_reference as indicated above is set, this is where the reference object is actually stored. */ | |
87 | JsonVariant *reference; | |
88 | ||
89 | /* Strings are placed immediately after the structure. Note that when this is a JsonVariant embedded | |
90 | * into an array we might encode strings up to INLINE_STRING_LENGTH characters directly inside the | |
91 | * element, while longer strings are stored as references. When this object is not embedded into an | |
92 | * array, but stand-alone we allocate the right size for the whole structure, i.e. the array might be | |
93 | * much larger than INLINE_STRING_LENGTH. | |
94 | * | |
95 | * Note that because we want to allocate arrays of the JsonVariant structure we specify [0] here, | |
96 | * rather than the prettier []. If we wouldn't, then this char array would have undefined size, and so | |
97 | * would the union and then the struct this is included in. And of structures with undefined size we | |
98 | * can't allocate arrays (at least not easily). */ | |
99 | char string[0]; | |
100 | }; | |
101 | }; | |
102 | ||
103 | /* Inside string arrays we have a series of JasonVariant structures one after the other. In this case, strings longer | |
104 | * than INLINE_STRING_MAX are stored as references, and all shorter ones inline. (This means — on x86-64 — strings up | |
105 | * to 15 chars are stored within the array elements, and all others in separate allocations) */ | |
106 | #define INLINE_STRING_MAX (sizeof(JsonVariant) - offsetof(JsonVariant, string) - 1U) | |
107 | ||
108 | /* Let's make sure this structure isn't increased in size accidentally. This check is only for our most relevant arch | |
109 | * (x86-64). */ | |
110 | #ifdef __x86_64__ | |
111 | assert_cc(sizeof(JsonVariant) == 48U); | |
112 | assert_cc(INLINE_STRING_MAX == 15U); | |
113 | #endif | |
114 | ||
115 | static JsonSource* json_source_new(const char *name) { | |
116 | JsonSource *s; | |
117 | ||
118 | assert(name); | |
119 | ||
120 | s = malloc(offsetof(JsonSource, name) + strlen(name) + 1); | |
121 | if (!s) | |
122 | return NULL; | |
123 | ||
124 | *s = (JsonSource) { | |
125 | .n_ref = 1, | |
126 | }; | |
127 | strcpy(s->name, name); | |
128 | ||
129 | return s; | |
130 | } | |
131 | ||
132 | DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(JsonSource, json_source, mfree); | |
133 | ||
134 | static bool json_source_equal(JsonSource *a, JsonSource *b) { | |
135 | if (a == b) | |
136 | return true; | |
137 | ||
138 | if (!a || !b) | |
139 | return false; | |
140 | ||
141 | return streq(a->name, b->name); | |
142 | } | |
143 | ||
144 | DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref); | |
145 | ||
d520d519 LP |
146 | /* There are four kind of JsonVariant* pointers: |
147 | * | |
148 | * 1. NULL | |
149 | * 2. A 'regular' one, i.e. pointing to malloc() memory | |
150 | * 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. | |
151 | * 4. A 'const string' one, i.e. a pointer to a const string. | |
152 | * | |
153 | * The four kinds of pointers can be discerned like this: | |
154 | * | |
155 | * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below | |
156 | * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other | |
157 | * 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, | |
158 | * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely | |
159 | * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we | |
160 | * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on | |
161 | * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */ | |
162 | ||
cd0b6c53 | 163 | static bool json_variant_is_magic(const JsonVariant *v) { |
4fcb507a LP |
164 | if (!v) |
165 | return false; | |
166 | ||
167 | return v < _JSON_VARIANT_MAGIC_MAX; | |
cd0b6c53 LP |
168 | } |
169 | ||
d520d519 LP |
170 | static bool json_variant_is_const_string(const JsonVariant *v) { |
171 | ||
172 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
173 | return false; | |
174 | ||
175 | /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We | |
176 | * hence use all uneven pointers as indicators for const strings. */ | |
177 | ||
178 | return (((uintptr_t) v) & 1) != 0; | |
179 | } | |
180 | ||
181 | static bool json_variant_is_regular(const JsonVariant *v) { | |
182 | ||
183 | if (v < _JSON_VARIANT_MAGIC_MAX) | |
184 | return false; | |
185 | ||
186 | return (((uintptr_t) v) & 1) == 0; | |
cd0b6c53 LP |
187 | } |
188 | ||
189 | static JsonVariant *json_variant_dereference(JsonVariant *v) { | |
190 | ||
191 | /* Recursively dereference variants that are references to other variants */ | |
192 | ||
193 | if (!v) | |
194 | return NULL; | |
195 | ||
d520d519 | 196 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
197 | return v; |
198 | ||
199 | if (!v->is_reference) | |
200 | return v; | |
201 | ||
202 | return json_variant_dereference(v->reference); | |
203 | } | |
204 | ||
b2fa0d4f LP |
205 | static uint16_t json_variant_depth(JsonVariant *v) { |
206 | ||
207 | v = json_variant_dereference(v); | |
208 | if (!v) | |
209 | return 0; | |
210 | ||
d520d519 | 211 | if (!json_variant_is_regular(v)) |
b2fa0d4f LP |
212 | return 0; |
213 | ||
214 | return v->depth; | |
215 | } | |
216 | ||
cd0b6c53 LP |
217 | static JsonVariant *json_variant_normalize(JsonVariant *v) { |
218 | ||
219 | /* Converts json variants to their normalized form, i.e. fully dereferenced and wherever possible converted to | |
220 | * the "magic" version if there is one */ | |
221 | ||
222 | if (!v) | |
223 | return NULL; | |
224 | ||
225 | v = json_variant_dereference(v); | |
226 | ||
227 | switch (json_variant_type(v)) { | |
228 | ||
229 | case JSON_VARIANT_BOOLEAN: | |
230 | return json_variant_boolean(v) ? JSON_VARIANT_MAGIC_TRUE : JSON_VARIANT_MAGIC_FALSE; | |
231 | ||
232 | case JSON_VARIANT_NULL: | |
233 | return JSON_VARIANT_MAGIC_NULL; | |
234 | ||
235 | case JSON_VARIANT_INTEGER: | |
236 | return json_variant_integer(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_INTEGER : v; | |
237 | ||
238 | case JSON_VARIANT_UNSIGNED: | |
239 | return json_variant_unsigned(v) == 0 ? JSON_VARIANT_MAGIC_ZERO_UNSIGNED : v; | |
240 | ||
241 | case JSON_VARIANT_REAL: | |
242 | #pragma GCC diagnostic push | |
243 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
244 | return json_variant_real(v) == 0.0 ? JSON_VARIANT_MAGIC_ZERO_REAL : v; | |
245 | #pragma GCC diagnostic pop | |
246 | ||
247 | case JSON_VARIANT_STRING: | |
248 | return isempty(json_variant_string(v)) ? JSON_VARIANT_MAGIC_EMPTY_STRING : v; | |
249 | ||
250 | case JSON_VARIANT_ARRAY: | |
251 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_ARRAY : v; | |
252 | ||
253 | case JSON_VARIANT_OBJECT: | |
254 | return json_variant_elements(v) == 0 ? JSON_VARIANT_MAGIC_EMPTY_OBJECT : v; | |
255 | ||
256 | default: | |
257 | return v; | |
258 | } | |
259 | } | |
260 | ||
261 | static JsonVariant *json_variant_conservative_normalize(JsonVariant *v) { | |
262 | ||
263 | /* Much like json_variant_normalize(), but won't simplify if the variant has a source/line location attached to | |
264 | * it, in order not to lose context */ | |
265 | ||
266 | if (!v) | |
267 | return NULL; | |
268 | ||
d520d519 | 269 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
270 | return v; |
271 | ||
272 | if (v->source || v->line > 0 || v->column > 0) | |
273 | return v; | |
274 | ||
275 | return json_variant_normalize(v); | |
276 | } | |
277 | ||
278 | static int json_variant_new(JsonVariant **ret, JsonVariantType type, size_t space) { | |
279 | JsonVariant *v; | |
280 | ||
281 | assert_return(ret, -EINVAL); | |
282 | ||
283 | v = malloc0(offsetof(JsonVariant, value) + space); | |
284 | if (!v) | |
285 | return -ENOMEM; | |
286 | ||
287 | v->n_ref = 1; | |
288 | v->type = type; | |
289 | ||
290 | *ret = v; | |
291 | return 0; | |
292 | } | |
293 | ||
294 | int json_variant_new_integer(JsonVariant **ret, intmax_t i) { | |
295 | JsonVariant *v; | |
296 | int r; | |
297 | ||
298 | assert_return(ret, -EINVAL); | |
299 | ||
300 | if (i == 0) { | |
301 | *ret = JSON_VARIANT_MAGIC_ZERO_INTEGER; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | r = json_variant_new(&v, JSON_VARIANT_INTEGER, sizeof(i)); | |
306 | if (r < 0) | |
307 | return r; | |
308 | ||
309 | v->value.integer = i; | |
310 | *ret = v; | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | int json_variant_new_unsigned(JsonVariant **ret, uintmax_t u) { | |
316 | JsonVariant *v; | |
317 | int r; | |
318 | ||
319 | assert_return(ret, -EINVAL); | |
320 | if (u == 0) { | |
321 | *ret = JSON_VARIANT_MAGIC_ZERO_UNSIGNED; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | r = json_variant_new(&v, JSON_VARIANT_UNSIGNED, sizeof(u)); | |
326 | if (r < 0) | |
327 | return r; | |
328 | ||
329 | v->value.unsig = u; | |
330 | *ret = v; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | int json_variant_new_real(JsonVariant **ret, long double d) { | |
336 | JsonVariant *v; | |
337 | int r; | |
338 | ||
339 | assert_return(ret, -EINVAL); | |
340 | ||
341 | #pragma GCC diagnostic push | |
342 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
343 | if (d == 0.0) { | |
344 | #pragma GCC diagnostic pop | |
345 | *ret = JSON_VARIANT_MAGIC_ZERO_REAL; | |
346 | return 0; | |
347 | } | |
348 | ||
349 | r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); | |
350 | if (r < 0) | |
351 | return r; | |
352 | ||
353 | v->value.real = d; | |
354 | *ret = v; | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | int json_variant_new_boolean(JsonVariant **ret, bool b) { | |
360 | assert_return(ret, -EINVAL); | |
361 | ||
362 | if (b) | |
363 | *ret = JSON_VARIANT_MAGIC_TRUE; | |
364 | else | |
365 | *ret = JSON_VARIANT_MAGIC_FALSE; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | int json_variant_new_null(JsonVariant **ret) { | |
371 | assert_return(ret, -EINVAL); | |
372 | ||
373 | *ret = JSON_VARIANT_MAGIC_NULL; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | int json_variant_new_stringn(JsonVariant **ret, const char *s, size_t n) { | |
378 | JsonVariant *v; | |
379 | int r; | |
380 | ||
381 | assert_return(ret, -EINVAL); | |
382 | if (!s) { | |
383 | assert_return(n == 0, -EINVAL); | |
384 | return json_variant_new_null(ret); | |
385 | } | |
386 | if (n == 0) { | |
387 | *ret = JSON_VARIANT_MAGIC_EMPTY_STRING; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | r = json_variant_new(&v, JSON_VARIANT_STRING, n + 1); | |
392 | if (r < 0) | |
393 | return r; | |
394 | ||
395 | memcpy(v->string, s, n); | |
396 | v->string[n] = 0; | |
397 | ||
398 | *ret = v; | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static void json_variant_set(JsonVariant *a, JsonVariant *b) { | |
403 | assert(a); | |
404 | ||
405 | b = json_variant_dereference(b); | |
406 | if (!b) { | |
407 | a->type = JSON_VARIANT_NULL; | |
408 | return; | |
409 | } | |
410 | ||
411 | a->type = json_variant_type(b); | |
412 | switch (a->type) { | |
413 | ||
414 | case JSON_VARIANT_INTEGER: | |
415 | a->value.integer = json_variant_integer(b); | |
416 | break; | |
417 | ||
418 | case JSON_VARIANT_UNSIGNED: | |
419 | a->value.unsig = json_variant_unsigned(b); | |
420 | break; | |
421 | ||
422 | case JSON_VARIANT_REAL: | |
423 | a->value.real = json_variant_real(b); | |
424 | break; | |
425 | ||
426 | case JSON_VARIANT_BOOLEAN: | |
427 | a->value.boolean = json_variant_boolean(b); | |
428 | break; | |
429 | ||
430 | case JSON_VARIANT_STRING: { | |
431 | const char *s; | |
432 | ||
433 | assert_se(s = json_variant_string(b)); | |
434 | ||
435 | /* Short strings we can store inline */ | |
436 | if (strnlen(s, INLINE_STRING_MAX+1) <= INLINE_STRING_MAX) { | |
437 | strcpy(a->string, s); | |
438 | break; | |
439 | } | |
440 | ||
441 | /* For longer strings, use a reference… */ | |
442 | _fallthrough_; | |
443 | } | |
444 | ||
445 | case JSON_VARIANT_ARRAY: | |
446 | case JSON_VARIANT_OBJECT: | |
447 | a->is_reference = true; | |
448 | a->reference = json_variant_ref(json_variant_conservative_normalize(b)); | |
449 | break; | |
450 | ||
451 | case JSON_VARIANT_NULL: | |
452 | break; | |
453 | ||
454 | default: | |
455 | assert_not_reached("Unexpected variant type"); | |
456 | } | |
457 | } | |
458 | ||
459 | static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) { | |
460 | assert(v); | |
461 | assert(from); | |
462 | ||
d520d519 | 463 | if (!json_variant_is_regular(from)) |
cd0b6c53 LP |
464 | return; |
465 | ||
466 | v->line = from->line; | |
467 | v->column = from->column; | |
468 | v->source = json_source_ref(from->source); | |
469 | } | |
470 | ||
471 | int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 472 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
473 | |
474 | assert_return(ret, -EINVAL); | |
475 | if (n == 0) { | |
476 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
477 | return 0; | |
478 | } | |
479 | assert_return(array, -EINVAL); | |
480 | ||
481 | v = new(JsonVariant, n + 1); | |
482 | if (!v) | |
483 | return -ENOMEM; | |
484 | ||
485 | *v = (JsonVariant) { | |
486 | .n_ref = 1, | |
487 | .type = JSON_VARIANT_ARRAY, | |
cd0b6c53 LP |
488 | }; |
489 | ||
b2fa0d4f LP |
490 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
491 | JsonVariant *w = v + 1 + v->n_elements, | |
492 | *c = array[v->n_elements]; | |
493 | uint16_t d; | |
494 | ||
495 | d = json_variant_depth(c); | |
496 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
497 | return -ELNRNG; | |
498 | if (d >= v->depth) | |
499 | v->depth = d + 1; | |
cd0b6c53 LP |
500 | |
501 | *w = (JsonVariant) { | |
502 | .is_embedded = true, | |
503 | .parent = v, | |
504 | }; | |
505 | ||
b2fa0d4f LP |
506 | json_variant_set(w, c); |
507 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
508 | } |
509 | ||
b2fa0d4f | 510 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
511 | return 0; |
512 | } | |
513 | ||
514 | int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) { | |
515 | JsonVariant *v; | |
516 | size_t i; | |
517 | ||
518 | assert_return(ret, -EINVAL); | |
519 | if (n == 0) { | |
520 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
521 | return 0; | |
522 | } | |
523 | assert_return(p, -EINVAL); | |
524 | ||
525 | v = new(JsonVariant, n + 1); | |
526 | if (!v) | |
527 | return -ENOMEM; | |
528 | ||
529 | *v = (JsonVariant) { | |
530 | .n_ref = 1, | |
531 | .type = JSON_VARIANT_ARRAY, | |
532 | .n_elements = n, | |
b2fa0d4f | 533 | .depth = 1, |
cd0b6c53 LP |
534 | }; |
535 | ||
536 | for (i = 0; i < n; i++) { | |
537 | JsonVariant *w = v + 1 + i; | |
538 | ||
539 | *w = (JsonVariant) { | |
540 | .is_embedded = true, | |
541 | .parent = v, | |
a1559e3f LP |
542 | .type = JSON_VARIANT_UNSIGNED, |
543 | .value.unsig = ((const uint8_t*) p)[i], | |
cd0b6c53 | 544 | }; |
cd0b6c53 LP |
545 | } |
546 | ||
547 | *ret = v; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | int json_variant_new_array_strv(JsonVariant **ret, char **l) { | |
552 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
553 | size_t n; | |
554 | int r; | |
555 | ||
556 | assert(ret); | |
557 | ||
558 | n = strv_length(l); | |
559 | if (n == 0) { | |
560 | *ret = JSON_VARIANT_MAGIC_EMPTY_ARRAY; | |
561 | return 0; | |
562 | } | |
563 | ||
a1559e3f | 564 | v = new(JsonVariant, n + 1); |
cd0b6c53 LP |
565 | if (!v) |
566 | return -ENOMEM; | |
567 | ||
568 | *v = (JsonVariant) { | |
569 | .n_ref = 1, | |
570 | .type = JSON_VARIANT_ARRAY, | |
b2fa0d4f | 571 | .depth = 1, |
cd0b6c53 LP |
572 | }; |
573 | ||
574 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { | |
575 | JsonVariant *w = v + 1 + v->n_elements; | |
576 | size_t k; | |
577 | ||
a1559e3f LP |
578 | *w = (JsonVariant) { |
579 | .is_embedded = true, | |
580 | .parent = v, | |
581 | .type = JSON_VARIANT_STRING, | |
582 | }; | |
cd0b6c53 LP |
583 | |
584 | k = strlen(l[v->n_elements]); | |
585 | ||
586 | if (k > INLINE_STRING_MAX) { | |
587 | /* If string is too long, store it as reference. */ | |
588 | ||
589 | r = json_variant_new_stringn(&w->reference, l[v->n_elements], k); | |
590 | if (r < 0) | |
591 | return r; | |
592 | ||
593 | w->is_reference = true; | |
594 | } else | |
595 | memcpy(w->string, l[v->n_elements], k+1); | |
596 | } | |
597 | ||
598 | *ret = TAKE_PTR(v); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) { | |
b2fa0d4f | 603 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
cd0b6c53 LP |
604 | |
605 | assert_return(ret, -EINVAL); | |
606 | if (n == 0) { | |
607 | *ret = JSON_VARIANT_MAGIC_EMPTY_OBJECT; | |
608 | return 0; | |
609 | } | |
610 | assert_return(array, -EINVAL); | |
611 | assert_return(n % 2 == 0, -EINVAL); | |
612 | ||
613 | v = new(JsonVariant, n + 1); | |
614 | if (!v) | |
615 | return -ENOMEM; | |
616 | ||
617 | *v = (JsonVariant) { | |
618 | .n_ref = 1, | |
619 | .type = JSON_VARIANT_OBJECT, | |
cd0b6c53 LP |
620 | }; |
621 | ||
b2fa0d4f LP |
622 | for (v->n_elements = 0; v->n_elements < n; v->n_elements++) { |
623 | JsonVariant *w = v + 1 + v->n_elements, | |
624 | *c = array[v->n_elements]; | |
625 | uint16_t d; | |
626 | ||
d77e781f LP |
627 | if ((v->n_elements & 1) == 0 && |
628 | !json_variant_is_string(c)) | |
629 | return -EINVAL; /* Every second one needs to be a string, as it is the key name */ | |
630 | ||
b2fa0d4f LP |
631 | d = json_variant_depth(c); |
632 | if (d >= DEPTH_MAX) /* Refuse too deep nesting */ | |
633 | return -ELNRNG; | |
634 | if (d >= v->depth) | |
635 | v->depth = d + 1; | |
cd0b6c53 LP |
636 | |
637 | *w = (JsonVariant) { | |
638 | .is_embedded = true, | |
639 | .parent = v, | |
640 | }; | |
641 | ||
b2fa0d4f LP |
642 | json_variant_set(w, c); |
643 | json_variant_copy_source(w, c); | |
cd0b6c53 LP |
644 | } |
645 | ||
b2fa0d4f | 646 | *ret = TAKE_PTR(v); |
cd0b6c53 LP |
647 | return 0; |
648 | } | |
649 | ||
650 | static void json_variant_free_inner(JsonVariant *v) { | |
651 | assert(v); | |
652 | ||
d520d519 | 653 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
654 | return; |
655 | ||
656 | json_source_unref(v->source); | |
657 | ||
658 | if (v->is_reference) { | |
659 | json_variant_unref(v->reference); | |
660 | return; | |
661 | } | |
662 | ||
663 | if (IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) { | |
664 | size_t i; | |
665 | ||
666 | for (i = 0; i < v->n_elements; i++) | |
667 | json_variant_free_inner(v + 1 + i); | |
668 | } | |
669 | } | |
670 | ||
671 | JsonVariant *json_variant_ref(JsonVariant *v) { | |
672 | if (!v) | |
673 | return NULL; | |
d520d519 | 674 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
675 | return v; |
676 | ||
677 | if (v->is_embedded) | |
678 | json_variant_ref(v->parent); /* ref the compounding variant instead */ | |
679 | else { | |
680 | assert(v->n_ref > 0); | |
681 | v->n_ref++; | |
682 | } | |
683 | ||
684 | return v; | |
685 | } | |
686 | ||
687 | JsonVariant *json_variant_unref(JsonVariant *v) { | |
688 | if (!v) | |
689 | return NULL; | |
d520d519 | 690 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
691 | return NULL; |
692 | ||
693 | if (v->is_embedded) | |
694 | json_variant_unref(v->parent); | |
695 | else { | |
696 | assert(v->n_ref > 0); | |
697 | v->n_ref--; | |
698 | ||
699 | if (v->n_ref == 0) { | |
700 | json_variant_free_inner(v); | |
701 | free(v); | |
702 | } | |
703 | } | |
704 | ||
705 | return NULL; | |
706 | } | |
707 | ||
708 | void json_variant_unref_many(JsonVariant **array, size_t n) { | |
709 | size_t i; | |
710 | ||
711 | assert(array || n == 0); | |
712 | ||
713 | for (i = 0; i < n; i++) | |
714 | json_variant_unref(array[i]); | |
715 | } | |
716 | ||
717 | const char *json_variant_string(JsonVariant *v) { | |
718 | if (!v) | |
719 | return NULL; | |
720 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
721 | return ""; | |
722 | if (json_variant_is_magic(v)) | |
723 | goto mismatch; | |
d520d519 LP |
724 | if (json_variant_is_const_string(v)) { |
725 | uintptr_t p = (uintptr_t) v; | |
726 | ||
727 | assert((p & 1) != 0); | |
728 | return (const char*) (p ^ 1U); | |
729 | } | |
730 | ||
cd0b6c53 LP |
731 | if (v->is_reference) |
732 | return json_variant_string(v->reference); | |
733 | if (v->type != JSON_VARIANT_STRING) | |
734 | goto mismatch; | |
735 | ||
736 | return v->string; | |
737 | ||
738 | mismatch: | |
739 | log_debug("Non-string JSON variant requested as string, returning NULL."); | |
740 | return NULL; | |
741 | } | |
742 | ||
743 | bool json_variant_boolean(JsonVariant *v) { | |
744 | if (!v) | |
745 | goto mismatch; | |
746 | if (v == JSON_VARIANT_MAGIC_TRUE) | |
747 | return true; | |
748 | if (v == JSON_VARIANT_MAGIC_FALSE) | |
749 | return false; | |
d520d519 | 750 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
751 | goto mismatch; |
752 | if (v->type != JSON_VARIANT_BOOLEAN) | |
753 | goto mismatch; | |
754 | if (v->is_reference) | |
755 | return json_variant_boolean(v->reference); | |
756 | ||
757 | return v->value.boolean; | |
758 | ||
759 | mismatch: | |
760 | log_debug("Non-boolean JSON variant requested as boolean, returning false."); | |
761 | return false; | |
762 | } | |
763 | ||
764 | intmax_t json_variant_integer(JsonVariant *v) { | |
765 | if (!v) | |
766 | goto mismatch; | |
767 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
768 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
769 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
770 | return 0; | |
d520d519 | 771 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
772 | goto mismatch; |
773 | if (v->is_reference) | |
774 | return json_variant_integer(v->reference); | |
775 | ||
776 | switch (v->type) { | |
777 | ||
778 | case JSON_VARIANT_INTEGER: | |
779 | return v->value.integer; | |
780 | ||
781 | case JSON_VARIANT_UNSIGNED: | |
782 | if (v->value.unsig <= INTMAX_MAX) | |
783 | return (intmax_t) v->value.unsig; | |
784 | ||
785 | log_debug("Unsigned integer %ju requested as signed integer and out of range, returning 0.", v->value.unsig); | |
786 | return 0; | |
787 | ||
788 | case JSON_VARIANT_REAL: { | |
789 | intmax_t converted; | |
790 | ||
791 | converted = (intmax_t) v->value.real; | |
792 | ||
793 | #pragma GCC diagnostic push | |
794 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
795 | if ((long double) converted == v->value.real) | |
796 | #pragma GCC diagnostic pop | |
797 | return converted; | |
798 | ||
799 | log_debug("Real %Lg requested as integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | default: | |
804 | break; | |
805 | } | |
806 | ||
807 | mismatch: | |
808 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
809 | return 0; | |
810 | } | |
811 | ||
812 | uintmax_t json_variant_unsigned(JsonVariant *v) { | |
813 | if (!v) | |
814 | goto mismatch; | |
815 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
816 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
817 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
818 | return 0; | |
d520d519 | 819 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
820 | goto mismatch; |
821 | if (v->is_reference) | |
822 | return json_variant_integer(v->reference); | |
823 | ||
824 | switch (v->type) { | |
825 | ||
826 | case JSON_VARIANT_INTEGER: | |
827 | if (v->value.integer >= 0) | |
828 | return (uintmax_t) v->value.integer; | |
829 | ||
830 | log_debug("Signed integer %ju requested as unsigned integer and out of range, returning 0.", v->value.integer); | |
831 | return 0; | |
832 | ||
833 | case JSON_VARIANT_UNSIGNED: | |
834 | return v->value.unsig; | |
835 | ||
836 | case JSON_VARIANT_REAL: { | |
837 | uintmax_t converted; | |
838 | ||
839 | converted = (uintmax_t) v->value.real; | |
840 | ||
841 | #pragma GCC diagnostic push | |
842 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
843 | if ((long double) converted == v->value.real) | |
844 | #pragma GCC diagnostic pop | |
845 | return converted; | |
846 | ||
847 | log_debug("Real %Lg requested as unsigned integer, and cannot be converted losslessly, returning 0.", v->value.real); | |
848 | return 0; | |
849 | } | |
850 | ||
851 | default: | |
852 | break; | |
853 | } | |
854 | ||
855 | mismatch: | |
856 | log_debug("Non-integer JSON variant requested as unsigned, returning 0."); | |
857 | return 0; | |
858 | } | |
859 | ||
860 | long double json_variant_real(JsonVariant *v) { | |
861 | if (!v) | |
862 | return 0.0; | |
863 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
864 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
865 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
866 | return 0.0; | |
d520d519 | 867 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
868 | goto mismatch; |
869 | if (v->is_reference) | |
870 | return json_variant_real(v->reference); | |
871 | ||
872 | switch (v->type) { | |
873 | ||
874 | case JSON_VARIANT_REAL: | |
875 | return v->value.real; | |
876 | ||
877 | case JSON_VARIANT_INTEGER: { | |
878 | long double converted; | |
879 | ||
880 | converted = (long double) v->value.integer; | |
881 | ||
882 | if ((intmax_t) converted == v->value.integer) | |
883 | return converted; | |
884 | ||
885 | log_debug("Signed integer %ji requested as real, and cannot be converted losslessly, returning 0.", v->value.integer); | |
886 | return 0.0; | |
887 | } | |
888 | ||
889 | case JSON_VARIANT_UNSIGNED: { | |
890 | long double converted; | |
891 | ||
892 | converted = (long double) v->value.unsig; | |
893 | ||
894 | if ((uintmax_t) converted == v->value.unsig) | |
895 | return converted; | |
896 | ||
897 | log_debug("Unsigned integer %ju requested as real, and cannot be converted losslessly, returning 0.", v->value.unsig); | |
898 | return 0.0; | |
899 | } | |
900 | ||
901 | default: | |
902 | break; | |
903 | } | |
904 | ||
905 | mismatch: | |
906 | log_debug("Non-integer JSON variant requested as integer, returning 0."); | |
92853e9b | 907 | return 0.0; |
cd0b6c53 LP |
908 | } |
909 | ||
910 | bool json_variant_is_negative(JsonVariant *v) { | |
911 | if (!v) | |
912 | goto mismatch; | |
913 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER || | |
914 | v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || | |
915 | v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
916 | return false; | |
d520d519 | 917 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
918 | goto mismatch; |
919 | if (v->is_reference) | |
920 | return json_variant_is_negative(v->reference); | |
921 | ||
922 | /* This function is useful as checking whether numbers are negative is pretty complex since we have three types | |
923 | * of numbers. And some JSON code (OCI for example) uses negative numbers to mark "not defined" numeric | |
924 | * values. */ | |
925 | ||
926 | switch (v->type) { | |
927 | ||
928 | case JSON_VARIANT_REAL: | |
929 | return v->value.real < 0; | |
930 | ||
931 | case JSON_VARIANT_INTEGER: | |
932 | return v->value.integer < 0; | |
933 | ||
934 | case JSON_VARIANT_UNSIGNED: | |
935 | return false; | |
936 | ||
937 | default: | |
938 | break; | |
939 | } | |
940 | ||
941 | mismatch: | |
942 | log_debug("Non-integer JSON variant tested for negativity, returning false."); | |
943 | return false; | |
944 | } | |
945 | ||
946 | JsonVariantType json_variant_type(JsonVariant *v) { | |
947 | ||
948 | if (!v) | |
949 | return _JSON_VARIANT_TYPE_INVALID; | |
950 | ||
d520d519 LP |
951 | if (json_variant_is_const_string(v)) |
952 | return JSON_VARIANT_STRING; | |
953 | ||
cd0b6c53 LP |
954 | if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE) |
955 | return JSON_VARIANT_BOOLEAN; | |
956 | ||
957 | if (v == JSON_VARIANT_MAGIC_NULL) | |
958 | return JSON_VARIANT_NULL; | |
959 | ||
960 | if (v == JSON_VARIANT_MAGIC_ZERO_INTEGER) | |
961 | return JSON_VARIANT_INTEGER; | |
962 | ||
963 | if (v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED) | |
964 | return JSON_VARIANT_UNSIGNED; | |
965 | ||
966 | if (v == JSON_VARIANT_MAGIC_ZERO_REAL) | |
967 | return JSON_VARIANT_REAL; | |
968 | ||
969 | if (v == JSON_VARIANT_MAGIC_EMPTY_STRING) | |
970 | return JSON_VARIANT_STRING; | |
971 | ||
972 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY) | |
973 | return JSON_VARIANT_ARRAY; | |
974 | ||
975 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
976 | return JSON_VARIANT_OBJECT; | |
977 | ||
978 | return v->type; | |
979 | } | |
980 | ||
981 | bool json_variant_has_type(JsonVariant *v, JsonVariantType type) { | |
982 | JsonVariantType rt; | |
983 | ||
984 | v = json_variant_dereference(v); | |
f8c186c9 LP |
985 | if (!v) |
986 | return false; | |
cd0b6c53 LP |
987 | |
988 | rt = json_variant_type(v); | |
989 | if (rt == type) | |
990 | return true; | |
991 | ||
d520d519 LP |
992 | /* If it's a const string, then it only can be a string, and if it is not, it's not */ |
993 | if (json_variant_is_const_string(v)) | |
994 | return false; | |
995 | ||
cd0b6c53 LP |
996 | /* All three magic zeroes qualify as integer, unsigned and as real */ |
997 | if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) && | |
998 | IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER)) | |
999 | return true; | |
1000 | ||
1001 | /* All other magic variant types are only equal to themselves */ | |
1002 | if (json_variant_is_magic(v)) | |
1003 | return false; | |
1004 | ||
1005 | /* Handle the "number" pseudo type */ | |
1006 | if (type == JSON_VARIANT_NUMBER) | |
1007 | return IN_SET(rt, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL); | |
1008 | ||
1009 | /* Integer conversions are OK in many cases */ | |
1010 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_UNSIGNED) | |
1011 | return v->value.integer >= 0; | |
1012 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_INTEGER) | |
1013 | return v->value.unsig <= INTMAX_MAX; | |
1014 | ||
1015 | /* Any integer that can be converted lossley to a real and back may also be considered a real */ | |
1016 | if (rt == JSON_VARIANT_INTEGER && type == JSON_VARIANT_REAL) | |
1017 | return (intmax_t) (long double) v->value.integer == v->value.integer; | |
1018 | if (rt == JSON_VARIANT_UNSIGNED && type == JSON_VARIANT_REAL) | |
1019 | return (uintmax_t) (long double) v->value.unsig == v->value.unsig; | |
1020 | ||
1021 | #pragma GCC diagnostic push | |
1022 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1023 | /* Any real that can be converted losslessly to an integer and back may also be considered an integer */ | |
1024 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_INTEGER) | |
1025 | return (long double) (intmax_t) v->value.real == v->value.real; | |
1026 | if (rt == JSON_VARIANT_REAL && type == JSON_VARIANT_UNSIGNED) | |
1027 | return (long double) (uintmax_t) v->value.real == v->value.real; | |
1028 | #pragma GCC diagnostic pop | |
1029 | ||
1030 | return false; | |
1031 | } | |
1032 | ||
1033 | size_t json_variant_elements(JsonVariant *v) { | |
1034 | if (!v) | |
1035 | return 0; | |
1036 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1037 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1038 | return 0; | |
d520d519 | 1039 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1040 | goto mismatch; |
1041 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1042 | goto mismatch; | |
1043 | if (v->is_reference) | |
1044 | return json_variant_elements(v->reference); | |
1045 | ||
1046 | return v->n_elements; | |
1047 | ||
1048 | mismatch: | |
1049 | log_debug("Number of elements in non-array/non-object JSON variant requested, returning 0."); | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) { | |
1054 | if (!v) | |
1055 | return NULL; | |
1056 | if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY || | |
1057 | v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1058 | return NULL; | |
d520d519 | 1059 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1060 | goto mismatch; |
1061 | if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT)) | |
1062 | goto mismatch; | |
1063 | if (v->is_reference) | |
1064 | return json_variant_by_index(v->reference, idx); | |
1065 | if (idx >= v->n_elements) | |
1066 | return NULL; | |
1067 | ||
1068 | return json_variant_conservative_normalize(v + 1 + idx); | |
1069 | ||
1070 | mismatch: | |
1071 | log_debug("Element in non-array/non-object JSON variant requested by index, returning NULL."); | |
1072 | return NULL; | |
1073 | } | |
1074 | ||
1075 | JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVariant **ret_key) { | |
1076 | size_t i; | |
1077 | ||
1078 | if (!v) | |
1079 | goto not_found; | |
1080 | if (!key) | |
1081 | goto not_found; | |
1082 | if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT) | |
1083 | goto not_found; | |
d520d519 | 1084 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1085 | goto mismatch; |
1086 | if (v->type != JSON_VARIANT_OBJECT) | |
1087 | goto mismatch; | |
1088 | if (v->is_reference) | |
1089 | return json_variant_by_key(v->reference, key); | |
1090 | ||
1091 | for (i = 0; i < v->n_elements; i += 2) { | |
1092 | JsonVariant *p; | |
1093 | ||
1094 | p = json_variant_dereference(v + 1 + i); | |
1095 | ||
1096 | if (!json_variant_has_type(p, JSON_VARIANT_STRING)) | |
1097 | continue; | |
1098 | ||
1099 | if (streq(json_variant_string(p), key)) { | |
1100 | ||
1101 | if (ret_key) | |
1102 | *ret_key = json_variant_conservative_normalize(v + 1 + i); | |
1103 | ||
1104 | return json_variant_conservative_normalize(v + 1 + i + 1); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | not_found: | |
1109 | if (ret_key) | |
1110 | *ret_key = NULL; | |
1111 | ||
1112 | return NULL; | |
1113 | ||
1114 | mismatch: | |
1115 | log_debug("Element in non-object JSON variant requested by key, returning NULL."); | |
1116 | if (ret_key) | |
1117 | *ret_key = NULL; | |
1118 | ||
1119 | return NULL; | |
1120 | } | |
1121 | ||
1122 | JsonVariant *json_variant_by_key(JsonVariant *v, const char *key) { | |
1123 | return json_variant_by_key_full(v, key, NULL); | |
1124 | } | |
1125 | ||
1126 | bool json_variant_equal(JsonVariant *a, JsonVariant *b) { | |
1127 | JsonVariantType t; | |
1128 | ||
1129 | a = json_variant_normalize(a); | |
1130 | b = json_variant_normalize(b); | |
1131 | ||
1132 | if (a == b) | |
1133 | return true; | |
1134 | ||
1135 | t = json_variant_type(a); | |
1136 | if (!json_variant_has_type(b, t)) | |
1137 | return false; | |
1138 | ||
1139 | switch (t) { | |
1140 | ||
1141 | case JSON_VARIANT_STRING: | |
1142 | return streq(json_variant_string(a), json_variant_string(b)); | |
1143 | ||
1144 | case JSON_VARIANT_INTEGER: | |
1145 | return json_variant_integer(a) == json_variant_integer(b); | |
1146 | ||
1147 | case JSON_VARIANT_UNSIGNED: | |
1148 | return json_variant_unsigned(a) == json_variant_unsigned(b); | |
1149 | ||
1150 | case JSON_VARIANT_REAL: | |
1151 | #pragma GCC diagnostic push | |
1152 | #pragma GCC diagnostic ignored "-Wfloat-equal" | |
1153 | return json_variant_real(a) == json_variant_real(b); | |
1154 | #pragma GCC diagnostic pop | |
1155 | ||
1156 | case JSON_VARIANT_BOOLEAN: | |
1157 | return json_variant_boolean(a) == json_variant_boolean(b); | |
1158 | ||
1159 | case JSON_VARIANT_NULL: | |
1160 | return true; | |
1161 | ||
1162 | case JSON_VARIANT_ARRAY: { | |
1163 | size_t i, n; | |
1164 | ||
1165 | n = json_variant_elements(a); | |
1166 | if (n != json_variant_elements(b)) | |
1167 | return false; | |
1168 | ||
1169 | for (i = 0; i < n; i++) { | |
1170 | if (!json_variant_equal(json_variant_by_index(a, i), json_variant_by_index(b, i))) | |
1171 | return false; | |
1172 | } | |
1173 | ||
1174 | return true; | |
1175 | } | |
1176 | ||
1177 | case JSON_VARIANT_OBJECT: { | |
1178 | size_t i, n; | |
1179 | ||
1180 | n = json_variant_elements(a); | |
1181 | if (n != json_variant_elements(b)) | |
1182 | return false; | |
1183 | ||
1184 | /* Iterate through all keys in 'a' */ | |
1185 | for (i = 0; i < n; i += 2) { | |
1186 | bool found = false; | |
1187 | size_t j; | |
1188 | ||
1189 | /* Match them against all keys in 'b' */ | |
1190 | for (j = 0; j < n; j += 2) { | |
1191 | JsonVariant *key_b; | |
1192 | ||
1193 | key_b = json_variant_by_index(b, j); | |
1194 | ||
1195 | /* During the first iteration unmark everything */ | |
1196 | if (i == 0) | |
1197 | key_b->is_marked = false; | |
1198 | else if (key_b->is_marked) /* In later iterations if we already marked something, don't bother with it again */ | |
1199 | continue; | |
1200 | ||
1201 | if (found) | |
1202 | continue; | |
1203 | ||
1204 | if (json_variant_equal(json_variant_by_index(a, i), key_b) && | |
1205 | json_variant_equal(json_variant_by_index(a, i+1), json_variant_by_index(b, j+1))) { | |
1206 | /* Key and values match! */ | |
1207 | key_b->is_marked = found = true; | |
1208 | ||
1209 | /* In the first iteration we continue the inner loop since we want to mark | |
1210 | * everything, otherwise exit the loop quickly after we found what we were | |
1211 | * looking for. */ | |
1212 | if (i != 0) | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | if (!found) | |
1218 | return false; | |
1219 | } | |
1220 | ||
1221 | return true; | |
1222 | } | |
1223 | ||
1224 | default: | |
1225 | assert_not_reached("Unknown variant type."); | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column) { | |
1230 | assert_return(v, -EINVAL); | |
1231 | ||
1232 | if (ret_source) | |
d520d519 | 1233 | *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL; |
cd0b6c53 LP |
1234 | |
1235 | if (ret_line) | |
d520d519 | 1236 | *ret_line = json_variant_is_regular(v) ? v->line : 0; |
cd0b6c53 LP |
1237 | |
1238 | if (ret_column) | |
d520d519 | 1239 | *ret_column = json_variant_is_regular(v) ? v->column : 0; |
cd0b6c53 LP |
1240 | |
1241 | return 0; | |
1242 | } | |
1243 | ||
897f099b | 1244 | static int print_source(FILE *f, JsonVariant *v, JsonFormatFlags flags, bool whitespace) { |
cd0b6c53 LP |
1245 | size_t w, k; |
1246 | ||
1247 | if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY)) | |
1248 | return 0; | |
1249 | ||
d520d519 | 1250 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1251 | return 0; |
1252 | ||
1253 | if (!v->source && v->line == 0 && v->column == 0) | |
1254 | return 0; | |
1255 | ||
1256 | /* The max width we need to format the line numbers for this source file */ | |
1257 | w = (v->source && v->source->max_line > 0) ? | |
1258 | DECIMAL_STR_WIDTH(v->source->max_line) : | |
1259 | DECIMAL_STR_MAX(unsigned)-1; | |
1260 | k = (v->source && v->source->max_column > 0) ? | |
1261 | DECIMAL_STR_WIDTH(v->source->max_column) : | |
1262 | DECIMAL_STR_MAX(unsigned) -1; | |
1263 | ||
1264 | if (whitespace) { | |
1265 | size_t i, n; | |
1266 | ||
1267 | n = 1 + (v->source ? strlen(v->source->name) : 0) + | |
1268 | ((v->source && (v->line > 0 || v->column > 0)) ? 1 : 0) + | |
1269 | (v->line > 0 ? w : 0) + | |
1270 | (((v->source || v->line > 0) && v->column > 0) ? 1 : 0) + | |
1271 | (v->column > 0 ? k : 0) + | |
1272 | 2; | |
1273 | ||
1274 | for (i = 0; i < n; i++) | |
1275 | fputc(' ', f); | |
1276 | } else { | |
1277 | fputc('[', f); | |
1278 | ||
1279 | if (v->source) | |
1280 | fputs(v->source->name, f); | |
1281 | if (v->source && (v->line > 0 || v->column > 0)) | |
1282 | fputc(':', f); | |
1283 | if (v->line > 0) | |
1284 | fprintf(f, "%*u", (int) w, v->line); | |
1285 | if ((v->source || v->line > 0) || v->column > 0) | |
1286 | fputc(':', f); | |
1287 | if (v->column > 0) | |
1288 | fprintf(f, "%*u", (int) k, v->column); | |
1289 | ||
1290 | fputc(']', f); | |
1291 | fputc(' ', f); | |
1292 | } | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
897f099b | 1297 | static int json_format(FILE *f, JsonVariant *v, JsonFormatFlags flags, const char *prefix) { |
cd0b6c53 LP |
1298 | int r; |
1299 | ||
1300 | assert(f); | |
1301 | assert(v); | |
1302 | ||
1303 | switch (json_variant_type(v)) { | |
1304 | ||
1305 | case JSON_VARIANT_REAL: { | |
1306 | locale_t loc; | |
1307 | ||
1308 | loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0); | |
1309 | if (loc == (locale_t) 0) | |
1310 | return -errno; | |
1311 | ||
1312 | if (flags & JSON_FORMAT_COLOR) | |
1313 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1314 | ||
1315 | fprintf(f, "%.*Le", DECIMAL_DIG, json_variant_real(v)); | |
1316 | ||
1317 | if (flags & JSON_FORMAT_COLOR) | |
1318 | fputs(ANSI_NORMAL, f); | |
1319 | ||
1320 | freelocale(loc); | |
1321 | break; | |
1322 | } | |
1323 | ||
1324 | case JSON_VARIANT_INTEGER: | |
1325 | if (flags & JSON_FORMAT_COLOR) | |
1326 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1327 | ||
1328 | fprintf(f, "%" PRIdMAX, json_variant_integer(v)); | |
1329 | ||
1330 | if (flags & JSON_FORMAT_COLOR) | |
1331 | fputs(ANSI_NORMAL, f); | |
1332 | break; | |
1333 | ||
1334 | case JSON_VARIANT_UNSIGNED: | |
1335 | if (flags & JSON_FORMAT_COLOR) | |
1336 | fputs(ANSI_HIGHLIGHT_BLUE, f); | |
1337 | ||
1338 | fprintf(f, "%" PRIuMAX, json_variant_unsigned(v)); | |
1339 | ||
1340 | if (flags & JSON_FORMAT_COLOR) | |
1341 | fputs(ANSI_NORMAL, f); | |
1342 | break; | |
1343 | ||
1344 | case JSON_VARIANT_BOOLEAN: | |
1345 | ||
1346 | if (flags & JSON_FORMAT_COLOR) | |
1347 | fputs(ANSI_HIGHLIGHT, f); | |
1348 | ||
1349 | if (json_variant_boolean(v)) | |
1350 | fputs("true", f); | |
1351 | else | |
1352 | fputs("false", f); | |
1353 | ||
1354 | if (flags & JSON_FORMAT_COLOR) | |
1355 | fputs(ANSI_NORMAL, f); | |
1356 | ||
1357 | break; | |
1358 | ||
1359 | case JSON_VARIANT_NULL: | |
1360 | if (flags & JSON_FORMAT_COLOR) | |
1361 | fputs(ANSI_HIGHLIGHT, f); | |
1362 | ||
1363 | fputs("null", f); | |
1364 | ||
1365 | if (flags & JSON_FORMAT_COLOR) | |
1366 | fputs(ANSI_NORMAL, f); | |
1367 | break; | |
1368 | ||
1369 | case JSON_VARIANT_STRING: { | |
1370 | const char *q; | |
1371 | ||
1372 | fputc('"', f); | |
1373 | ||
1374 | if (flags & JSON_FORMAT_COLOR) | |
1375 | fputs(ANSI_GREEN, f); | |
1376 | ||
1377 | for (q = json_variant_string(v); *q; q++) { | |
1378 | ||
1379 | switch (*q) { | |
1380 | ||
1381 | case '"': | |
1382 | fputs("\\\"", f); | |
1383 | break; | |
1384 | ||
1385 | case '\\': | |
1386 | fputs("\\\\", f); | |
1387 | break; | |
1388 | ||
cd0b6c53 LP |
1389 | case '\b': |
1390 | fputs("\\b", f); | |
1391 | break; | |
1392 | ||
1393 | case '\f': | |
1394 | fputs("\\f", f); | |
1395 | break; | |
1396 | ||
1397 | case '\n': | |
1398 | fputs("\\n", f); | |
1399 | break; | |
1400 | ||
1401 | case '\r': | |
1402 | fputs("\\r", f); | |
1403 | break; | |
1404 | ||
1405 | case '\t': | |
1406 | fputs("\\t", f); | |
1407 | break; | |
1408 | ||
1409 | default: | |
df7f9e0b | 1410 | if ((signed char) *q >= 0 && *q < ' ') |
cd0b6c53 LP |
1411 | fprintf(f, "\\u%04x", *q); |
1412 | else | |
1413 | fputc(*q, f); | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | if (flags & JSON_FORMAT_COLOR) | |
1419 | fputs(ANSI_NORMAL, f); | |
1420 | ||
1421 | fputc('"', f); | |
1422 | break; | |
1423 | } | |
1424 | ||
1425 | case JSON_VARIANT_ARRAY: { | |
1426 | size_t i, n; | |
1427 | ||
1428 | n = json_variant_elements(v); | |
1429 | ||
1430 | if (n == 0) | |
1431 | fputs("[]", f); | |
1432 | else { | |
4ae7e4e5 | 1433 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1434 | const char *prefix2; |
1435 | ||
1436 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1437 | joined = strjoin(strempty(prefix), "\t"); |
1438 | if (!joined) | |
1439 | return -ENOMEM; | |
1440 | ||
1441 | prefix2 = joined; | |
cd0b6c53 LP |
1442 | fputs("[\n", f); |
1443 | } else { | |
1444 | prefix2 = strempty(prefix); | |
1445 | fputc('[', f); | |
1446 | } | |
1447 | ||
1448 | for (i = 0; i < n; i++) { | |
1449 | JsonVariant *e; | |
1450 | ||
1451 | assert_se(e = json_variant_by_index(v, i)); | |
1452 | ||
1453 | if (i > 0) { | |
1454 | if (flags & JSON_FORMAT_PRETTY) | |
1455 | fputs(",\n", f); | |
1456 | else | |
1457 | fputc(',', f); | |
1458 | } | |
1459 | ||
1460 | if (flags & JSON_FORMAT_PRETTY) { | |
1461 | print_source(f, e, flags, false); | |
1462 | fputs(prefix2, f); | |
1463 | } | |
1464 | ||
1465 | r = json_format(f, e, flags, prefix2); | |
1466 | if (r < 0) | |
1467 | return r; | |
1468 | } | |
1469 | ||
1470 | if (flags & JSON_FORMAT_PRETTY) { | |
1471 | fputc('\n', f); | |
1472 | print_source(f, v, flags, true); | |
1473 | fputs(strempty(prefix), f); | |
1474 | } | |
1475 | ||
1476 | fputc(']', f); | |
1477 | } | |
1478 | break; | |
1479 | } | |
1480 | ||
1481 | case JSON_VARIANT_OBJECT: { | |
1482 | size_t i, n; | |
1483 | ||
1484 | n = json_variant_elements(v); | |
1485 | ||
1486 | if (n == 0) | |
1487 | fputs("{}", f); | |
1488 | else { | |
4ae7e4e5 | 1489 | _cleanup_free_ char *joined = NULL; |
cd0b6c53 LP |
1490 | const char *prefix2; |
1491 | ||
1492 | if (flags & JSON_FORMAT_PRETTY) { | |
4ae7e4e5 LP |
1493 | joined = strjoin(strempty(prefix), "\t"); |
1494 | if (!joined) | |
1495 | return -ENOMEM; | |
1496 | ||
1497 | prefix2 = joined; | |
cd0b6c53 LP |
1498 | fputs("{\n", f); |
1499 | } else { | |
1500 | prefix2 = strempty(prefix); | |
1501 | fputc('{', f); | |
1502 | } | |
1503 | ||
1504 | for (i = 0; i < n; i += 2) { | |
1505 | JsonVariant *e; | |
1506 | ||
1507 | e = json_variant_by_index(v, i); | |
1508 | ||
1509 | if (i > 0) { | |
1510 | if (flags & JSON_FORMAT_PRETTY) | |
1511 | fputs(",\n", f); | |
1512 | else | |
1513 | fputc(',', f); | |
1514 | } | |
1515 | ||
1516 | if (flags & JSON_FORMAT_PRETTY) { | |
1517 | print_source(f, e, flags, false); | |
1518 | fputs(prefix2, f); | |
1519 | } | |
1520 | ||
1521 | r = json_format(f, e, flags, prefix2); | |
1522 | if (r < 0) | |
1523 | return r; | |
1524 | ||
1525 | fputs(flags & JSON_FORMAT_PRETTY ? " : " : ":", f); | |
1526 | ||
1527 | r = json_format(f, json_variant_by_index(v, i+1), flags, prefix2); | |
1528 | if (r < 0) | |
1529 | return r; | |
1530 | } | |
1531 | ||
1532 | if (flags & JSON_FORMAT_PRETTY) { | |
1533 | fputc('\n', f); | |
1534 | print_source(f, v, flags, true); | |
1535 | fputs(strempty(prefix), f); | |
1536 | } | |
1537 | ||
1538 | fputc('}', f); | |
1539 | } | |
1540 | break; | |
1541 | } | |
1542 | ||
1543 | default: | |
1544 | assert_not_reached("Unexpected variant type."); | |
1545 | } | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
897f099b | 1550 | int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret) { |
cd0b6c53 LP |
1551 | _cleanup_free_ char *s = NULL; |
1552 | size_t sz = 0; | |
1553 | int r; | |
1554 | ||
1555 | assert_return(v, -EINVAL); | |
1556 | assert_return(ret, -EINVAL); | |
1557 | ||
1558 | { | |
1559 | _cleanup_fclose_ FILE *f = NULL; | |
1560 | ||
1561 | f = open_memstream(&s, &sz); | |
1562 | if (!f) | |
1563 | return -ENOMEM; | |
1564 | ||
1565 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); | |
1566 | ||
1567 | json_variant_dump(v, flags, f, NULL); | |
1568 | ||
1569 | r = fflush_and_check(f); | |
1570 | } | |
1571 | if (r < 0) | |
1572 | return r; | |
1573 | ||
1574 | assert(s); | |
1575 | *ret = TAKE_PTR(s); | |
1576 | ||
1577 | return (int) sz; | |
1578 | } | |
1579 | ||
897f099b | 1580 | void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const char *prefix) { |
cd0b6c53 LP |
1581 | if (!v) |
1582 | return; | |
1583 | ||
1584 | if (!f) | |
1585 | f = stdout; | |
1586 | ||
1587 | print_source(f, v, flags, false); | |
1588 | ||
ab91733c LP |
1589 | if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled()) |
1590 | flags |= JSON_FORMAT_COLOR; | |
1591 | ||
cd0b6c53 LP |
1592 | if (flags & JSON_FORMAT_SSE) |
1593 | fputs("data: ", f); | |
1594 | if (flags & JSON_FORMAT_SEQ) | |
1595 | fputc('\x1e', f); /* ASCII Record Separator */ | |
1596 | ||
1597 | json_format(f, v, flags, prefix); | |
1598 | ||
1599 | if (flags & (JSON_FORMAT_PRETTY|JSON_FORMAT_SEQ|JSON_FORMAT_SSE|JSON_FORMAT_NEWLINE)) | |
1600 | fputc('\n', f); | |
1601 | if (flags & JSON_FORMAT_SSE) | |
1602 | fputc('\n', f); /* In case of SSE add a second newline */ | |
1603 | } | |
1604 | ||
1605 | static int json_variant_copy(JsonVariant **nv, JsonVariant *v) { | |
1606 | JsonVariantType t; | |
1607 | JsonVariant *c; | |
1608 | JsonValue value; | |
1609 | const void *source; | |
1610 | size_t k; | |
1611 | ||
1612 | assert(nv); | |
1613 | assert(v); | |
1614 | ||
1615 | /* Let's copy the simple types literally, and the larger types by references */ | |
1616 | t = json_variant_type(v); | |
1617 | switch (t) { | |
1618 | case JSON_VARIANT_INTEGER: | |
1619 | k = sizeof(intmax_t); | |
1620 | value.integer = json_variant_integer(v); | |
1621 | source = &value; | |
1622 | break; | |
1623 | ||
1624 | case JSON_VARIANT_UNSIGNED: | |
1625 | k = sizeof(uintmax_t); | |
1626 | value.unsig = json_variant_unsigned(v); | |
1627 | source = &value; | |
1628 | break; | |
1629 | ||
1630 | case JSON_VARIANT_REAL: | |
1631 | k = sizeof(long double); | |
1632 | value.real = json_variant_real(v); | |
1633 | source = &value; | |
1634 | break; | |
1635 | ||
1636 | case JSON_VARIANT_BOOLEAN: | |
1637 | k = sizeof(bool); | |
1638 | value.boolean = json_variant_boolean(v); | |
1639 | source = &value; | |
1640 | break; | |
1641 | ||
1642 | case JSON_VARIANT_NULL: | |
1643 | k = 0; | |
1644 | source = NULL; | |
1645 | break; | |
1646 | ||
1647 | case JSON_VARIANT_STRING: | |
1648 | source = json_variant_string(v); | |
1649 | k = strnlen(source, INLINE_STRING_MAX + 1); | |
1650 | if (k <= INLINE_STRING_MAX) { | |
1651 | k ++; | |
1652 | break; | |
1653 | } | |
1654 | ||
1655 | _fallthrough_; | |
1656 | ||
1657 | default: | |
1658 | /* Everything else copy by reference */ | |
1659 | ||
1660 | c = malloc0(offsetof(JsonVariant, reference) + sizeof(JsonVariant*)); | |
1661 | if (!c) | |
1662 | return -ENOMEM; | |
1663 | ||
1664 | c->n_ref = 1; | |
1665 | c->type = t; | |
1666 | c->is_reference = true; | |
1667 | c->reference = json_variant_ref(json_variant_normalize(v)); | |
1668 | ||
1669 | *nv = c; | |
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | c = malloc0(offsetof(JsonVariant, value) + k); | |
1674 | if (!c) | |
1675 | return -ENOMEM; | |
1676 | ||
1677 | c->n_ref = 1; | |
1678 | c->type = t; | |
1679 | ||
1680 | memcpy_safe(&c->value, source, k); | |
1681 | ||
1682 | *nv = c; | |
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static bool json_single_ref(JsonVariant *v) { | |
1687 | ||
1688 | /* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */ | |
1689 | ||
d520d519 | 1690 | if (!json_variant_is_regular(v)) |
cd0b6c53 LP |
1691 | return false; |
1692 | ||
1693 | if (v->is_embedded) | |
1694 | return json_single_ref(v->parent); | |
1695 | ||
1696 | assert(v->n_ref > 0); | |
1697 | return v->n_ref == 1; | |
1698 | } | |
1699 | ||
1700 | static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned line, unsigned column) { | |
1701 | JsonVariant *w; | |
1702 | int r; | |
1703 | ||
1704 | assert(v); | |
1705 | ||
1706 | /* Patch in source and line/column number. Tries to do this in-place if the caller is the sole referencer of | |
1707 | * the object. If not, allocates a new object, possibly a surrogate for the original one */ | |
1708 | ||
1709 | if (!*v) | |
1710 | return 0; | |
1711 | ||
1712 | if (source && line > source->max_line) | |
1713 | source->max_line = line; | |
1714 | if (source && column > source->max_column) | |
1715 | source->max_column = column; | |
1716 | ||
d520d519 | 1717 | if (!json_variant_is_regular(*v)) { |
cd0b6c53 LP |
1718 | |
1719 | if (!source && line == 0 && column == 0) | |
1720 | return 0; | |
1721 | ||
1722 | } else { | |
1723 | if (json_source_equal((*v)->source, source) && | |
1724 | (*v)->line == line && | |
1725 | (*v)->column == column) | |
1726 | return 0; | |
1727 | ||
1728 | if (json_single_ref(*v)) { /* Sole reference? */ | |
1729 | json_source_unref((*v)->source); | |
1730 | (*v)->source = json_source_ref(source); | |
1731 | (*v)->line = line; | |
1732 | (*v)->column = column; | |
1733 | return 1; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | r = json_variant_copy(&w, *v); | |
1738 | if (r < 0) | |
1739 | return r; | |
1740 | ||
d520d519 | 1741 | assert(json_variant_is_regular(w)); |
cd0b6c53 LP |
1742 | assert(!w->is_embedded); |
1743 | assert(w->n_ref == 1); | |
1744 | assert(!w->source); | |
1745 | ||
1746 | w->source = json_source_ref(source); | |
1747 | w->line = line; | |
1748 | w->column = column; | |
1749 | ||
1750 | json_variant_unref(*v); | |
1751 | *v = w; | |
1752 | ||
1753 | return 1; | |
1754 | } | |
1755 | ||
1756 | static void inc_lines_columns(unsigned *line, unsigned *column, const char *s, size_t n) { | |
1757 | assert(line); | |
1758 | assert(column); | |
1759 | assert(s || n == 0); | |
1760 | ||
1761 | while (n > 0) { | |
cd0b6c53 LP |
1762 | if (*s == '\n') { |
1763 | (*line)++; | |
1764 | *column = 1; | |
df7f9e0b | 1765 | } else if ((signed char) *s >= 0 && *s < 127) /* Process ASCII chars quickly */ |
cd0b6c53 LP |
1766 | (*column)++; |
1767 | else { | |
1768 | int w; | |
1769 | ||
92e068b4 | 1770 | w = utf8_encoded_valid_unichar(s, n); |
cd0b6c53 LP |
1771 | if (w < 0) /* count invalid unichars as normal characters */ |
1772 | w = 1; | |
1773 | else if ((size_t) w > n) /* never read more than the specified number of characters */ | |
1774 | w = (int) n; | |
1775 | ||
1776 | (*column)++; | |
1777 | ||
1778 | s += w; | |
1779 | n -= w; | |
1780 | continue; | |
1781 | } | |
1782 | ||
1783 | s++; | |
1784 | n--; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | static int unhex_ucs2(const char *c, uint16_t *ret) { | |
1789 | int aa, bb, cc, dd; | |
1790 | uint16_t x; | |
1791 | ||
1792 | assert(c); | |
1793 | assert(ret); | |
1794 | ||
1795 | aa = unhexchar(c[0]); | |
1796 | if (aa < 0) | |
1797 | return -EINVAL; | |
1798 | ||
1799 | bb = unhexchar(c[1]); | |
1800 | if (bb < 0) | |
1801 | return -EINVAL; | |
1802 | ||
1803 | cc = unhexchar(c[2]); | |
1804 | if (cc < 0) | |
1805 | return -EINVAL; | |
1806 | ||
1807 | dd = unhexchar(c[3]); | |
1808 | if (dd < 0) | |
1809 | return -EINVAL; | |
1810 | ||
1811 | x = ((uint16_t) aa << 12) | | |
1812 | ((uint16_t) bb << 8) | | |
1813 | ((uint16_t) cc << 4) | | |
1814 | ((uint16_t) dd); | |
1815 | ||
1816 | if (x <= 0) | |
1817 | return -EINVAL; | |
1818 | ||
1819 | *ret = x; | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | static int json_parse_string(const char **p, char **ret) { | |
1825 | _cleanup_free_ char *s = NULL; | |
1826 | size_t n = 0, allocated = 0; | |
1827 | const char *c; | |
1828 | ||
1829 | assert(p); | |
1830 | assert(*p); | |
1831 | assert(ret); | |
1832 | ||
1833 | c = *p; | |
1834 | ||
1835 | if (*c != '"') | |
1836 | return -EINVAL; | |
1837 | ||
1838 | c++; | |
1839 | ||
1840 | for (;;) { | |
1841 | int len; | |
1842 | ||
1843 | /* Check for EOF */ | |
1844 | if (*c == 0) | |
1845 | return -EINVAL; | |
1846 | ||
1847 | /* Check for control characters 0x00..0x1f */ | |
1848 | if (*c > 0 && *c < ' ') | |
1849 | return -EINVAL; | |
1850 | ||
1851 | /* Check for control character 0x7f */ | |
1852 | if (*c == 0x7f) | |
1853 | return -EINVAL; | |
1854 | ||
1855 | if (*c == '"') { | |
1856 | if (!s) { | |
1857 | s = strdup(""); | |
1858 | if (!s) | |
1859 | return -ENOMEM; | |
1860 | } else | |
1861 | s[n] = 0; | |
1862 | ||
1863 | *p = c + 1; | |
1864 | ||
490c5a37 | 1865 | *ret = TAKE_PTR(s); |
cd0b6c53 LP |
1866 | return JSON_TOKEN_STRING; |
1867 | } | |
1868 | ||
1869 | if (*c == '\\') { | |
1870 | char ch = 0; | |
1871 | c++; | |
1872 | ||
1873 | if (*c == 0) | |
1874 | return -EINVAL; | |
1875 | ||
1876 | if (IN_SET(*c, '"', '\\', '/')) | |
1877 | ch = *c; | |
1878 | else if (*c == 'b') | |
1879 | ch = '\b'; | |
1880 | else if (*c == 'f') | |
1881 | ch = '\f'; | |
1882 | else if (*c == 'n') | |
1883 | ch = '\n'; | |
1884 | else if (*c == 'r') | |
1885 | ch = '\r'; | |
1886 | else if (*c == 't') | |
1887 | ch = '\t'; | |
1888 | else if (*c == 'u') { | |
1889 | char16_t x; | |
1890 | int r; | |
1891 | ||
1892 | r = unhex_ucs2(c + 1, &x); | |
1893 | if (r < 0) | |
1894 | return r; | |
1895 | ||
1896 | c += 5; | |
1897 | ||
1898 | if (!GREEDY_REALLOC(s, allocated, n + 5)) | |
1899 | return -ENOMEM; | |
1900 | ||
1901 | if (!utf16_is_surrogate(x)) | |
1902 | n += utf8_encode_unichar(s + n, (char32_t) x); | |
1903 | else if (utf16_is_trailing_surrogate(x)) | |
1904 | return -EINVAL; | |
1905 | else { | |
1906 | char16_t y; | |
1907 | ||
1908 | if (c[0] != '\\' || c[1] != 'u') | |
1909 | return -EINVAL; | |
1910 | ||
1911 | r = unhex_ucs2(c + 2, &y); | |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
1915 | c += 6; | |
1916 | ||
1917 | if (!utf16_is_trailing_surrogate(y)) | |
1918 | return -EINVAL; | |
1919 | ||
1920 | n += utf8_encode_unichar(s + n, utf16_surrogate_pair_to_unichar(x, y)); | |
1921 | } | |
1922 | ||
1923 | continue; | |
1924 | } else | |
1925 | return -EINVAL; | |
1926 | ||
1927 | if (!GREEDY_REALLOC(s, allocated, n + 2)) | |
1928 | return -ENOMEM; | |
1929 | ||
1930 | s[n++] = ch; | |
1931 | c ++; | |
1932 | continue; | |
1933 | } | |
1934 | ||
92e068b4 | 1935 | len = utf8_encoded_valid_unichar(c, (size_t) -1); |
cd0b6c53 LP |
1936 | if (len < 0) |
1937 | return len; | |
1938 | ||
1939 | if (!GREEDY_REALLOC(s, allocated, n + len + 1)) | |
1940 | return -ENOMEM; | |
1941 | ||
1942 | memcpy(s + n, c, len); | |
1943 | n += len; | |
1944 | c += len; | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | static int json_parse_number(const char **p, JsonValue *ret) { | |
1949 | bool negative = false, exponent_negative = false, is_real = false; | |
1950 | long double x = 0.0, y = 0.0, exponent = 0.0, shift = 1.0; | |
1951 | intmax_t i = 0; | |
1952 | uintmax_t u = 0; | |
1953 | const char *c; | |
1954 | ||
1955 | assert(p); | |
1956 | assert(*p); | |
1957 | assert(ret); | |
1958 | ||
1959 | c = *p; | |
1960 | ||
1961 | if (*c == '-') { | |
1962 | negative = true; | |
1963 | c++; | |
1964 | } | |
1965 | ||
1966 | if (*c == '0') | |
1967 | c++; | |
1968 | else { | |
1969 | if (!strchr("123456789", *c) || *c == 0) | |
1970 | return -EINVAL; | |
1971 | ||
1972 | do { | |
1973 | if (!is_real) { | |
1974 | if (negative) { | |
1975 | ||
1976 | if (i < INTMAX_MIN / 10) /* overflow */ | |
1977 | is_real = true; | |
1978 | else { | |
1979 | intmax_t t = 10 * i; | |
1980 | ||
1981 | if (t < INTMAX_MIN + (*c - '0')) /* overflow */ | |
1982 | is_real = true; | |
1983 | else | |
1984 | i = t - (*c - '0'); | |
1985 | } | |
1986 | } else { | |
1987 | if (u > UINTMAX_MAX / 10) /* overflow */ | |
1988 | is_real = true; | |
1989 | else { | |
1990 | uintmax_t t = 10 * u; | |
1991 | ||
1992 | if (t > UINTMAX_MAX - (*c - '0')) /* overflow */ | |
1993 | is_real = true; | |
1994 | else | |
1995 | u = t + (*c - '0'); | |
1996 | } | |
1997 | } | |
1998 | } | |
1999 | ||
2000 | x = 10.0 * x + (*c - '0'); | |
2001 | ||
2002 | c++; | |
2003 | } while (strchr("0123456789", *c) && *c != 0); | |
2004 | } | |
2005 | ||
2006 | if (*c == '.') { | |
2007 | is_real = true; | |
2008 | c++; | |
2009 | ||
2010 | if (!strchr("0123456789", *c) || *c == 0) | |
2011 | return -EINVAL; | |
2012 | ||
2013 | do { | |
2014 | y = 10.0 * y + (*c - '0'); | |
2015 | shift = 10.0 * shift; | |
2016 | c++; | |
2017 | } while (strchr("0123456789", *c) && *c != 0); | |
2018 | } | |
2019 | ||
490c5a37 | 2020 | if (IN_SET(*c, 'e', 'E')) { |
cd0b6c53 LP |
2021 | is_real = true; |
2022 | c++; | |
2023 | ||
2024 | if (*c == '-') { | |
2025 | exponent_negative = true; | |
2026 | c++; | |
2027 | } else if (*c == '+') | |
2028 | c++; | |
2029 | ||
2030 | if (!strchr("0123456789", *c) || *c == 0) | |
2031 | return -EINVAL; | |
2032 | ||
2033 | do { | |
2034 | exponent = 10.0 * exponent + (*c - '0'); | |
2035 | c++; | |
2036 | } while (strchr("0123456789", *c) && *c != 0); | |
2037 | } | |
2038 | ||
2039 | *p = c; | |
2040 | ||
2041 | if (is_real) { | |
2042 | ret->real = ((negative ? -1.0 : 1.0) * (x + (y / shift))) * exp10l((exponent_negative ? -1.0 : 1.0) * exponent); | |
2043 | return JSON_TOKEN_REAL; | |
2044 | } else if (negative) { | |
2045 | ret->integer = i; | |
2046 | return JSON_TOKEN_INTEGER; | |
2047 | } else { | |
2048 | ret->unsig = u; | |
2049 | return JSON_TOKEN_UNSIGNED; | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | int json_tokenize( | |
2054 | const char **p, | |
2055 | char **ret_string, | |
2056 | JsonValue *ret_value, | |
2057 | unsigned *ret_line, /* 'ret_line' returns the line at the beginning of this token */ | |
2058 | unsigned *ret_column, | |
2059 | void **state, | |
2060 | unsigned *line, /* 'line' is used as a line state, it always reflect the line we are at after the token was read */ | |
2061 | unsigned *column) { | |
2062 | ||
2063 | unsigned start_line, start_column; | |
2064 | const char *start, *c; | |
2065 | size_t n; | |
2066 | int t, r; | |
2067 | ||
2068 | enum { | |
2069 | STATE_NULL, | |
2070 | STATE_VALUE, | |
2071 | STATE_VALUE_POST, | |
2072 | }; | |
2073 | ||
2074 | assert(p); | |
2075 | assert(*p); | |
2076 | assert(ret_string); | |
2077 | assert(ret_value); | |
2078 | assert(ret_line); | |
2079 | assert(ret_column); | |
2080 | assert(line); | |
2081 | assert(column); | |
2082 | assert(state); | |
2083 | ||
2084 | t = PTR_TO_INT(*state); | |
2085 | if (t == STATE_NULL) { | |
2086 | *line = 1; | |
2087 | *column = 1; | |
2088 | t = STATE_VALUE; | |
2089 | } | |
2090 | ||
2091 | /* Skip over the whitespace */ | |
2092 | n = strspn(*p, WHITESPACE); | |
2093 | inc_lines_columns(line, column, *p, n); | |
2094 | c = *p + n; | |
2095 | ||
2096 | /* Remember where we started processing this token */ | |
2097 | start = c; | |
2098 | start_line = *line; | |
2099 | start_column = *column; | |
2100 | ||
2101 | if (*c == 0) { | |
2102 | *ret_string = NULL; | |
2103 | *ret_value = JSON_VALUE_NULL; | |
2104 | r = JSON_TOKEN_END; | |
2105 | goto finish; | |
2106 | } | |
2107 | ||
2108 | switch (t) { | |
2109 | ||
2110 | case STATE_VALUE: | |
2111 | ||
2112 | if (*c == '{') { | |
2113 | c++; | |
2114 | *state = INT_TO_PTR(STATE_VALUE); | |
2115 | r = JSON_TOKEN_OBJECT_OPEN; | |
2116 | goto null_return; | |
2117 | ||
2118 | } else if (*c == '}') { | |
2119 | c++; | |
2120 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2121 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2122 | goto null_return; | |
2123 | ||
2124 | } else if (*c == '[') { | |
2125 | c++; | |
2126 | *state = INT_TO_PTR(STATE_VALUE); | |
2127 | r = JSON_TOKEN_ARRAY_OPEN; | |
2128 | goto null_return; | |
2129 | ||
2130 | } else if (*c == ']') { | |
2131 | c++; | |
2132 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2133 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2134 | goto null_return; | |
2135 | ||
2136 | } else if (*c == '"') { | |
2137 | ||
2138 | r = json_parse_string(&c, ret_string); | |
2139 | if (r < 0) | |
2140 | return r; | |
2141 | ||
2142 | *ret_value = JSON_VALUE_NULL; | |
2143 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2144 | goto finish; | |
2145 | ||
2146 | } else if (strchr("-0123456789", *c)) { | |
2147 | ||
2148 | r = json_parse_number(&c, ret_value); | |
2149 | if (r < 0) | |
2150 | return r; | |
2151 | ||
2152 | *ret_string = NULL; | |
2153 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2154 | goto finish; | |
2155 | ||
2156 | } else if (startswith(c, "true")) { | |
2157 | *ret_string = NULL; | |
2158 | ret_value->boolean = true; | |
2159 | c += 4; | |
2160 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2161 | r = JSON_TOKEN_BOOLEAN; | |
2162 | goto finish; | |
2163 | ||
2164 | } else if (startswith(c, "false")) { | |
2165 | *ret_string = NULL; | |
2166 | ret_value->boolean = false; | |
2167 | c += 5; | |
2168 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2169 | r = JSON_TOKEN_BOOLEAN; | |
2170 | goto finish; | |
2171 | ||
2172 | } else if (startswith(c, "null")) { | |
2173 | *ret_string = NULL; | |
2174 | *ret_value = JSON_VALUE_NULL; | |
2175 | c += 4; | |
2176 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2177 | r = JSON_TOKEN_NULL; | |
2178 | goto finish; | |
2179 | ||
2180 | } | |
2181 | ||
2182 | return -EINVAL; | |
2183 | ||
2184 | case STATE_VALUE_POST: | |
2185 | ||
2186 | if (*c == ':') { | |
2187 | c++; | |
2188 | *state = INT_TO_PTR(STATE_VALUE); | |
2189 | r = JSON_TOKEN_COLON; | |
2190 | goto null_return; | |
2191 | ||
2192 | } else if (*c == ',') { | |
2193 | c++; | |
2194 | *state = INT_TO_PTR(STATE_VALUE); | |
2195 | r = JSON_TOKEN_COMMA; | |
2196 | goto null_return; | |
2197 | ||
2198 | } else if (*c == '}') { | |
2199 | c++; | |
2200 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2201 | r = JSON_TOKEN_OBJECT_CLOSE; | |
2202 | goto null_return; | |
2203 | ||
2204 | } else if (*c == ']') { | |
2205 | c++; | |
2206 | *state = INT_TO_PTR(STATE_VALUE_POST); | |
2207 | r = JSON_TOKEN_ARRAY_CLOSE; | |
2208 | goto null_return; | |
2209 | } | |
2210 | ||
2211 | return -EINVAL; | |
2212 | ||
2213 | default: | |
2214 | assert_not_reached("Unexpected tokenizer state"); | |
2215 | } | |
2216 | ||
2217 | null_return: | |
2218 | *ret_string = NULL; | |
2219 | *ret_value = JSON_VALUE_NULL; | |
2220 | ||
2221 | finish: | |
2222 | inc_lines_columns(line, column, start, c - start); | |
2223 | *p = c; | |
2224 | ||
2225 | *ret_line = start_line; | |
2226 | *ret_column = start_column; | |
2227 | ||
2228 | return r; | |
2229 | } | |
2230 | ||
2231 | typedef enum JsonExpect { | |
2232 | /* The following values are used by json_parse() */ | |
2233 | EXPECT_TOPLEVEL, | |
2234 | EXPECT_END, | |
2235 | EXPECT_OBJECT_FIRST_KEY, | |
2236 | EXPECT_OBJECT_NEXT_KEY, | |
2237 | EXPECT_OBJECT_COLON, | |
2238 | EXPECT_OBJECT_VALUE, | |
2239 | EXPECT_OBJECT_COMMA, | |
2240 | EXPECT_ARRAY_FIRST_ELEMENT, | |
2241 | EXPECT_ARRAY_NEXT_ELEMENT, | |
2242 | EXPECT_ARRAY_COMMA, | |
2243 | ||
2244 | /* And these are used by json_build() */ | |
2245 | EXPECT_ARRAY_ELEMENT, | |
2246 | EXPECT_OBJECT_KEY, | |
2247 | } JsonExpect; | |
2248 | ||
2249 | typedef struct JsonStack { | |
2250 | JsonExpect expect; | |
2251 | JsonVariant **elements; | |
2252 | size_t n_elements, n_elements_allocated; | |
2253 | unsigned line_before; | |
2254 | unsigned column_before; | |
319a4f27 | 2255 | size_t n_suppress; /* When building: if > 0, suppress this many subsequent elements. If == (size_t) -1, suppress all subsequent elements */ |
cd0b6c53 LP |
2256 | } JsonStack; |
2257 | ||
2258 | static void json_stack_release(JsonStack *s) { | |
2259 | assert(s); | |
2260 | ||
2261 | json_variant_unref_many(s->elements, s->n_elements); | |
2262 | s->elements = mfree(s->elements); | |
2263 | } | |
2264 | ||
2265 | static int json_parse_internal( | |
2266 | const char **input, | |
2267 | JsonSource *source, | |
2268 | JsonVariant **ret, | |
2269 | unsigned *line, | |
2270 | unsigned *column, | |
2271 | bool continue_end) { | |
2272 | ||
2273 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2274 | unsigned line_buffer = 0, column_buffer = 0; | |
2275 | void *tokenizer_state = NULL; | |
2276 | JsonStack *stack = NULL; | |
2277 | const char *p; | |
2278 | int r; | |
2279 | ||
2280 | assert_return(input, -EINVAL); | |
2281 | assert_return(ret, -EINVAL); | |
2282 | ||
2283 | p = *input; | |
2284 | ||
2285 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2286 | return -ENOMEM; | |
2287 | ||
2288 | stack[0] = (JsonStack) { | |
2289 | .expect = EXPECT_TOPLEVEL, | |
2290 | }; | |
2291 | ||
2292 | if (!line) | |
2293 | line = &line_buffer; | |
2294 | if (!column) | |
2295 | column = &column_buffer; | |
2296 | ||
2297 | for (;;) { | |
2298 | _cleanup_free_ char *string = NULL; | |
2299 | unsigned line_token, column_token; | |
2300 | JsonVariant *add = NULL; | |
2301 | JsonStack *current; | |
2302 | JsonValue value; | |
2303 | int token; | |
2304 | ||
2305 | assert(n_stack > 0); | |
2306 | current = stack + n_stack - 1; | |
2307 | ||
2308 | if (continue_end && current->expect == EXPECT_END) | |
2309 | goto done; | |
2310 | ||
2311 | token = json_tokenize(&p, &string, &value, &line_token, &column_token, &tokenizer_state, line, column); | |
2312 | if (token < 0) { | |
2313 | r = token; | |
2314 | goto finish; | |
2315 | } | |
2316 | ||
2317 | switch (token) { | |
2318 | ||
2319 | case JSON_TOKEN_END: | |
2320 | if (current->expect != EXPECT_END) { | |
2321 | r = -EINVAL; | |
2322 | goto finish; | |
2323 | } | |
2324 | ||
2325 | assert(current->n_elements == 1); | |
2326 | assert(n_stack == 1); | |
2327 | goto done; | |
2328 | ||
2329 | case JSON_TOKEN_COLON: | |
2330 | ||
2331 | if (current->expect != EXPECT_OBJECT_COLON) { | |
2332 | r = -EINVAL; | |
2333 | goto finish; | |
2334 | } | |
2335 | ||
2336 | current->expect = EXPECT_OBJECT_VALUE; | |
2337 | break; | |
2338 | ||
2339 | case JSON_TOKEN_COMMA: | |
2340 | ||
2341 | if (current->expect == EXPECT_OBJECT_COMMA) | |
2342 | current->expect = EXPECT_OBJECT_NEXT_KEY; | |
2343 | else if (current->expect == EXPECT_ARRAY_COMMA) | |
2344 | current->expect = EXPECT_ARRAY_NEXT_ELEMENT; | |
2345 | else { | |
2346 | r = -EINVAL; | |
2347 | goto finish; | |
2348 | } | |
2349 | ||
2350 | break; | |
2351 | ||
2352 | case JSON_TOKEN_OBJECT_OPEN: | |
2353 | ||
2354 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2355 | r = -EINVAL; | |
2356 | goto finish; | |
2357 | } | |
2358 | ||
2359 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2360 | r = -ENOMEM; | |
2361 | goto finish; | |
2362 | } | |
2363 | current = stack + n_stack - 1; | |
2364 | ||
2365 | /* Prepare the expect for when we return from the child */ | |
2366 | if (current->expect == EXPECT_TOPLEVEL) | |
2367 | current->expect = EXPECT_END; | |
2368 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2369 | current->expect = EXPECT_OBJECT_COMMA; | |
2370 | else { | |
2371 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2372 | current->expect = EXPECT_ARRAY_COMMA; | |
2373 | } | |
2374 | ||
2375 | stack[n_stack++] = (JsonStack) { | |
2376 | .expect = EXPECT_OBJECT_FIRST_KEY, | |
2377 | .line_before = line_token, | |
2378 | .column_before = column_token, | |
2379 | }; | |
2380 | ||
2381 | current = stack + n_stack - 1; | |
2382 | break; | |
2383 | ||
2384 | case JSON_TOKEN_OBJECT_CLOSE: | |
2385 | if (!IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_COMMA)) { | |
2386 | r = -EINVAL; | |
2387 | goto finish; | |
2388 | } | |
2389 | ||
2390 | assert(n_stack > 1); | |
2391 | ||
2392 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
2393 | if (r < 0) | |
2394 | goto finish; | |
2395 | ||
2396 | line_token = current->line_before; | |
2397 | column_token = current->column_before; | |
2398 | ||
2399 | json_stack_release(current); | |
2400 | n_stack--, current--; | |
2401 | ||
2402 | break; | |
2403 | ||
2404 | case JSON_TOKEN_ARRAY_OPEN: | |
2405 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2406 | r = -EINVAL; | |
2407 | goto finish; | |
2408 | } | |
2409 | ||
2410 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2411 | r = -ENOMEM; | |
2412 | goto finish; | |
2413 | } | |
2414 | current = stack + n_stack - 1; | |
2415 | ||
2416 | /* Prepare the expect for when we return from the child */ | |
2417 | if (current->expect == EXPECT_TOPLEVEL) | |
2418 | current->expect = EXPECT_END; | |
2419 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2420 | current->expect = EXPECT_OBJECT_COMMA; | |
2421 | else { | |
2422 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2423 | current->expect = EXPECT_ARRAY_COMMA; | |
2424 | } | |
2425 | ||
2426 | stack[n_stack++] = (JsonStack) { | |
2427 | .expect = EXPECT_ARRAY_FIRST_ELEMENT, | |
2428 | .line_before = line_token, | |
2429 | .column_before = column_token, | |
2430 | }; | |
2431 | ||
2432 | break; | |
2433 | ||
2434 | case JSON_TOKEN_ARRAY_CLOSE: | |
2435 | if (!IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_COMMA)) { | |
2436 | r = -EINVAL; | |
2437 | goto finish; | |
2438 | } | |
2439 | ||
2440 | assert(n_stack > 1); | |
2441 | ||
2442 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2443 | if (r < 0) | |
2444 | goto finish; | |
2445 | ||
2446 | line_token = current->line_before; | |
2447 | column_token = current->column_before; | |
2448 | ||
2449 | json_stack_release(current); | |
2450 | n_stack--, current--; | |
2451 | break; | |
2452 | ||
2453 | case JSON_TOKEN_STRING: | |
2454 | 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)) { | |
2455 | r = -EINVAL; | |
2456 | goto finish; | |
2457 | } | |
2458 | ||
2459 | r = json_variant_new_string(&add, string); | |
2460 | if (r < 0) | |
2461 | goto finish; | |
2462 | ||
2463 | if (current->expect == EXPECT_TOPLEVEL) | |
2464 | current->expect = EXPECT_END; | |
2465 | else if (IN_SET(current->expect, EXPECT_OBJECT_FIRST_KEY, EXPECT_OBJECT_NEXT_KEY)) | |
2466 | current->expect = EXPECT_OBJECT_COLON; | |
2467 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2468 | current->expect = EXPECT_OBJECT_COMMA; | |
2469 | else { | |
2470 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2471 | current->expect = EXPECT_ARRAY_COMMA; | |
2472 | } | |
2473 | ||
2474 | break; | |
2475 | ||
2476 | case JSON_TOKEN_REAL: | |
2477 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2478 | r = -EINVAL; | |
2479 | goto finish; | |
2480 | } | |
2481 | ||
2482 | r = json_variant_new_real(&add, value.real); | |
2483 | if (r < 0) | |
2484 | goto finish; | |
2485 | ||
2486 | if (current->expect == EXPECT_TOPLEVEL) | |
2487 | current->expect = EXPECT_END; | |
2488 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2489 | current->expect = EXPECT_OBJECT_COMMA; | |
2490 | else { | |
2491 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2492 | current->expect = EXPECT_ARRAY_COMMA; | |
2493 | } | |
2494 | ||
2495 | break; | |
2496 | ||
2497 | case JSON_TOKEN_INTEGER: | |
2498 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2499 | r = -EINVAL; | |
2500 | goto finish; | |
2501 | } | |
2502 | ||
2503 | r = json_variant_new_integer(&add, value.integer); | |
2504 | if (r < 0) | |
2505 | goto finish; | |
2506 | ||
2507 | if (current->expect == EXPECT_TOPLEVEL) | |
2508 | current->expect = EXPECT_END; | |
2509 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2510 | current->expect = EXPECT_OBJECT_COMMA; | |
2511 | else { | |
2512 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2513 | current->expect = EXPECT_ARRAY_COMMA; | |
2514 | } | |
2515 | ||
2516 | break; | |
2517 | ||
2518 | case JSON_TOKEN_UNSIGNED: | |
2519 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2520 | r = -EINVAL; | |
2521 | goto finish; | |
2522 | } | |
2523 | ||
2524 | r = json_variant_new_unsigned(&add, value.unsig); | |
2525 | if (r < 0) | |
2526 | goto finish; | |
2527 | ||
2528 | if (current->expect == EXPECT_TOPLEVEL) | |
2529 | current->expect = EXPECT_END; | |
2530 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2531 | current->expect = EXPECT_OBJECT_COMMA; | |
2532 | else { | |
2533 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2534 | current->expect = EXPECT_ARRAY_COMMA; | |
2535 | } | |
2536 | ||
2537 | break; | |
2538 | ||
2539 | case JSON_TOKEN_BOOLEAN: | |
2540 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2541 | r = -EINVAL; | |
2542 | goto finish; | |
2543 | } | |
2544 | ||
2545 | r = json_variant_new_boolean(&add, value.boolean); | |
2546 | if (r < 0) | |
2547 | goto finish; | |
2548 | ||
2549 | if (current->expect == EXPECT_TOPLEVEL) | |
2550 | current->expect = EXPECT_END; | |
2551 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2552 | current->expect = EXPECT_OBJECT_COMMA; | |
2553 | else { | |
2554 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2555 | current->expect = EXPECT_ARRAY_COMMA; | |
2556 | } | |
2557 | ||
2558 | break; | |
2559 | ||
2560 | case JSON_TOKEN_NULL: | |
2561 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)) { | |
2562 | r = -EINVAL; | |
2563 | goto finish; | |
2564 | } | |
2565 | ||
2566 | r = json_variant_new_null(&add); | |
2567 | if (r < 0) | |
2568 | goto finish; | |
2569 | ||
2570 | if (current->expect == EXPECT_TOPLEVEL) | |
2571 | current->expect = EXPECT_END; | |
2572 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2573 | current->expect = EXPECT_OBJECT_COMMA; | |
2574 | else { | |
2575 | assert(IN_SET(current->expect, EXPECT_ARRAY_FIRST_ELEMENT, EXPECT_ARRAY_NEXT_ELEMENT)); | |
2576 | current->expect = EXPECT_ARRAY_COMMA; | |
2577 | } | |
2578 | ||
2579 | break; | |
2580 | ||
2581 | default: | |
2582 | assert_not_reached("Unexpected token"); | |
2583 | } | |
2584 | ||
2585 | if (add) { | |
2586 | (void) json_variant_set_source(&add, source, line_token, column_token); | |
2587 | ||
2588 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { | |
2589 | r = -ENOMEM; | |
2590 | goto finish; | |
2591 | } | |
2592 | ||
2593 | current->elements[current->n_elements++] = add; | |
2594 | } | |
2595 | } | |
2596 | ||
2597 | done: | |
2598 | assert(n_stack == 1); | |
2599 | assert(stack[0].n_elements == 1); | |
2600 | ||
2601 | *ret = json_variant_ref(stack[0].elements[0]); | |
2602 | *input = p; | |
2603 | r = 0; | |
2604 | ||
2605 | finish: | |
2606 | for (i = 0; i < n_stack; i++) | |
2607 | json_stack_release(stack + i); | |
2608 | ||
2609 | free(stack); | |
2610 | ||
2611 | return r; | |
2612 | } | |
2613 | ||
2614 | int json_parse(const char *input, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2615 | return json_parse_internal(&input, NULL, ret, ret_line, ret_column, false); | |
2616 | } | |
2617 | ||
2618 | int json_parse_continue(const char **p, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2619 | return json_parse_internal(p, NULL, ret, ret_line, ret_column, true); | |
2620 | } | |
2621 | ||
2622 | int json_parse_file(FILE *f, const char *path, JsonVariant **ret, unsigned *ret_line, unsigned *ret_column) { | |
2623 | _cleanup_(json_source_unrefp) JsonSource *source = NULL; | |
2624 | _cleanup_free_ char *text = NULL; | |
2625 | const char *p; | |
2626 | int r; | |
2627 | ||
2628 | if (f) | |
2629 | r = read_full_stream(f, &text, NULL); | |
2630 | else if (path) | |
2631 | r = read_full_file(path, &text, NULL); | |
2632 | else | |
2633 | return -EINVAL; | |
2634 | if (r < 0) | |
2635 | return r; | |
2636 | ||
2637 | if (path) { | |
2638 | source = json_source_new(path); | |
2639 | if (!source) | |
2640 | return -ENOMEM; | |
2641 | } | |
2642 | ||
2643 | p = text; | |
2644 | return json_parse_internal(&p, source, ret, ret_line, ret_column, false); | |
2645 | } | |
2646 | ||
2647 | int json_buildv(JsonVariant **ret, va_list ap) { | |
2648 | JsonStack *stack = NULL; | |
2649 | size_t n_stack = 1, n_stack_allocated = 0, i; | |
2650 | int r; | |
2651 | ||
2652 | assert_return(ret, -EINVAL); | |
2653 | ||
2654 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack)) | |
2655 | return -ENOMEM; | |
2656 | ||
2657 | stack[0] = (JsonStack) { | |
2658 | .expect = EXPECT_TOPLEVEL, | |
2659 | }; | |
2660 | ||
2661 | for (;;) { | |
fcadf032 | 2662 | _cleanup_(json_variant_unrefp) JsonVariant *add = NULL; |
319a4f27 LP |
2663 | size_t n_subtract = 0; /* how much to subtract from current->n_suppress, i.e. how many elements would |
2664 | * have been added to the current variant */ | |
cd0b6c53 LP |
2665 | JsonStack *current; |
2666 | int command; | |
2667 | ||
2668 | assert(n_stack > 0); | |
2669 | current = stack + n_stack - 1; | |
2670 | ||
2671 | if (current->expect == EXPECT_END) | |
2672 | goto done; | |
2673 | ||
2674 | command = va_arg(ap, int); | |
2675 | ||
2676 | switch (command) { | |
2677 | ||
2678 | case _JSON_BUILD_STRING: { | |
2679 | const char *p; | |
2680 | ||
2681 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2682 | r = -EINVAL; | |
2683 | goto finish; | |
2684 | } | |
2685 | ||
2686 | p = va_arg(ap, const char *); | |
2687 | ||
319a4f27 LP |
2688 | if (current->n_suppress == 0) { |
2689 | r = json_variant_new_string(&add, p); | |
2690 | if (r < 0) | |
2691 | goto finish; | |
2692 | } | |
2693 | ||
2694 | n_subtract = 1; | |
cd0b6c53 LP |
2695 | |
2696 | if (current->expect == EXPECT_TOPLEVEL) | |
2697 | current->expect = EXPECT_END; | |
2698 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2699 | current->expect = EXPECT_OBJECT_KEY; | |
2700 | else | |
2701 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2702 | ||
2703 | break; | |
2704 | } | |
2705 | ||
2706 | case _JSON_BUILD_INTEGER: { | |
2707 | intmax_t j; | |
2708 | ||
2709 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2710 | r = -EINVAL; | |
2711 | goto finish; | |
2712 | } | |
2713 | ||
2714 | j = va_arg(ap, intmax_t); | |
2715 | ||
319a4f27 LP |
2716 | if (current->n_suppress == 0) { |
2717 | r = json_variant_new_integer(&add, j); | |
2718 | if (r < 0) | |
2719 | goto finish; | |
2720 | } | |
2721 | ||
2722 | n_subtract = 1; | |
cd0b6c53 LP |
2723 | |
2724 | if (current->expect == EXPECT_TOPLEVEL) | |
2725 | current->expect = EXPECT_END; | |
2726 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2727 | current->expect = EXPECT_OBJECT_KEY; | |
2728 | else | |
2729 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2730 | ||
2731 | break; | |
2732 | } | |
2733 | ||
2734 | case _JSON_BUILD_UNSIGNED: { | |
2735 | uintmax_t j; | |
2736 | ||
2737 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2738 | r = -EINVAL; | |
2739 | goto finish; | |
2740 | } | |
2741 | ||
2742 | j = va_arg(ap, uintmax_t); | |
2743 | ||
319a4f27 LP |
2744 | if (current->n_suppress == 0) { |
2745 | r = json_variant_new_unsigned(&add, j); | |
2746 | if (r < 0) | |
2747 | goto finish; | |
2748 | } | |
2749 | ||
2750 | n_subtract = 1; | |
cd0b6c53 LP |
2751 | |
2752 | if (current->expect == EXPECT_TOPLEVEL) | |
2753 | current->expect = EXPECT_END; | |
2754 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2755 | current->expect = EXPECT_OBJECT_KEY; | |
2756 | else | |
2757 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2758 | ||
2759 | break; | |
2760 | } | |
2761 | ||
2762 | case _JSON_BUILD_REAL: { | |
2763 | long double d; | |
2764 | ||
2765 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2766 | r = -EINVAL; | |
2767 | goto finish; | |
2768 | } | |
2769 | ||
2770 | d = va_arg(ap, long double); | |
2771 | ||
319a4f27 LP |
2772 | if (current->n_suppress == 0) { |
2773 | r = json_variant_new_real(&add, d); | |
2774 | if (r < 0) | |
2775 | goto finish; | |
2776 | } | |
2777 | ||
2778 | n_subtract = 1; | |
cd0b6c53 LP |
2779 | |
2780 | if (current->expect == EXPECT_TOPLEVEL) | |
2781 | current->expect = EXPECT_END; | |
2782 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2783 | current->expect = EXPECT_OBJECT_KEY; | |
2784 | else | |
2785 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2786 | ||
2787 | break; | |
2788 | } | |
2789 | ||
2790 | case _JSON_BUILD_BOOLEAN: { | |
2791 | bool b; | |
2792 | ||
2793 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2794 | r = -EINVAL; | |
2795 | goto finish; | |
2796 | } | |
2797 | ||
2798 | b = va_arg(ap, int); | |
2799 | ||
319a4f27 LP |
2800 | if (current->n_suppress == 0) { |
2801 | r = json_variant_new_boolean(&add, b); | |
2802 | if (r < 0) | |
2803 | goto finish; | |
2804 | } | |
2805 | ||
2806 | n_subtract = 1; | |
cd0b6c53 LP |
2807 | |
2808 | if (current->expect == EXPECT_TOPLEVEL) | |
2809 | current->expect = EXPECT_END; | |
2810 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2811 | current->expect = EXPECT_OBJECT_KEY; | |
2812 | else | |
2813 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2814 | ||
2815 | break; | |
2816 | } | |
2817 | ||
2818 | case _JSON_BUILD_NULL: | |
2819 | ||
2820 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2821 | r = -EINVAL; | |
2822 | goto finish; | |
2823 | } | |
2824 | ||
319a4f27 LP |
2825 | if (current->n_suppress == 0) { |
2826 | r = json_variant_new_null(&add); | |
2827 | if (r < 0) | |
2828 | goto finish; | |
2829 | } | |
2830 | ||
2831 | n_subtract = 1; | |
cd0b6c53 LP |
2832 | |
2833 | if (current->expect == EXPECT_TOPLEVEL) | |
2834 | current->expect = EXPECT_END; | |
2835 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2836 | current->expect = EXPECT_OBJECT_KEY; | |
2837 | else | |
2838 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2839 | ||
2840 | break; | |
2841 | ||
2842 | case _JSON_BUILD_VARIANT: | |
2843 | ||
2844 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2845 | r = -EINVAL; | |
2846 | goto finish; | |
2847 | } | |
2848 | ||
319a4f27 LP |
2849 | /* Note that we don't care for current->n_suppress here, after all the variant is already |
2850 | * allocated anyway... */ | |
cd0b6c53 LP |
2851 | add = va_arg(ap, JsonVariant*); |
2852 | if (!add) | |
2853 | add = JSON_VARIANT_MAGIC_NULL; | |
2854 | else | |
2855 | json_variant_ref(add); | |
2856 | ||
319a4f27 LP |
2857 | n_subtract = 1; |
2858 | ||
cd0b6c53 LP |
2859 | if (current->expect == EXPECT_TOPLEVEL) |
2860 | current->expect = EXPECT_END; | |
2861 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2862 | current->expect = EXPECT_OBJECT_KEY; | |
2863 | else | |
2864 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2865 | ||
2866 | break; | |
2867 | ||
2868 | case _JSON_BUILD_LITERAL: { | |
2869 | const char *l; | |
2870 | ||
2871 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2872 | r = -EINVAL; | |
2873 | goto finish; | |
2874 | } | |
2875 | ||
2876 | l = va_arg(ap, const char *); | |
2877 | ||
319a4f27 LP |
2878 | if (l) { |
2879 | /* Note that we don't care for current->n_suppress here, we should generate parsing | |
2880 | * errors even in suppressed object properties */ | |
2881 | ||
cd0b6c53 LP |
2882 | r = json_parse(l, &add, NULL, NULL); |
2883 | if (r < 0) | |
2884 | goto finish; | |
319a4f27 LP |
2885 | } else |
2886 | add = JSON_VARIANT_MAGIC_NULL; | |
2887 | ||
2888 | n_subtract = 1; | |
cd0b6c53 LP |
2889 | |
2890 | if (current->expect == EXPECT_TOPLEVEL) | |
2891 | current->expect = EXPECT_END; | |
2892 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2893 | current->expect = EXPECT_OBJECT_KEY; | |
2894 | else | |
2895 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2896 | ||
2897 | break; | |
2898 | } | |
2899 | ||
2900 | case _JSON_BUILD_ARRAY_BEGIN: | |
2901 | ||
2902 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2903 | r = -EINVAL; | |
2904 | goto finish; | |
2905 | } | |
2906 | ||
2907 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2908 | r = -ENOMEM; | |
2909 | goto finish; | |
2910 | } | |
2911 | current = stack + n_stack - 1; | |
2912 | ||
2913 | if (current->expect == EXPECT_TOPLEVEL) | |
2914 | current->expect = EXPECT_END; | |
2915 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2916 | current->expect = EXPECT_OBJECT_KEY; | |
2917 | else | |
2918 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2919 | ||
2920 | stack[n_stack++] = (JsonStack) { | |
2921 | .expect = EXPECT_ARRAY_ELEMENT, | |
319a4f27 LP |
2922 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
2923 | * new array, then we should | |
2924 | * also suppress all array | |
2925 | * members */ | |
cd0b6c53 LP |
2926 | }; |
2927 | ||
2928 | break; | |
2929 | ||
2930 | case _JSON_BUILD_ARRAY_END: | |
2931 | if (current->expect != EXPECT_ARRAY_ELEMENT) { | |
2932 | r = -EINVAL; | |
2933 | goto finish; | |
2934 | } | |
2935 | ||
2936 | assert(n_stack > 1); | |
2937 | ||
319a4f27 LP |
2938 | if (current->n_suppress == 0) { |
2939 | r = json_variant_new_array(&add, current->elements, current->n_elements); | |
2940 | if (r < 0) | |
2941 | goto finish; | |
2942 | } | |
2943 | ||
2944 | n_subtract = 1; | |
cd0b6c53 LP |
2945 | |
2946 | json_stack_release(current); | |
2947 | n_stack--, current--; | |
2948 | ||
2949 | break; | |
2950 | ||
2951 | case _JSON_BUILD_STRV: { | |
2952 | char **l; | |
2953 | ||
2954 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2955 | r = -EINVAL; | |
2956 | goto finish; | |
2957 | } | |
2958 | ||
2959 | l = va_arg(ap, char **); | |
2960 | ||
319a4f27 LP |
2961 | if (current->n_suppress == 0) { |
2962 | r = json_variant_new_array_strv(&add, l); | |
2963 | if (r < 0) | |
2964 | goto finish; | |
2965 | } | |
2966 | ||
2967 | n_subtract = 1; | |
cd0b6c53 LP |
2968 | |
2969 | if (current->expect == EXPECT_TOPLEVEL) | |
2970 | current->expect = EXPECT_END; | |
2971 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2972 | current->expect = EXPECT_OBJECT_KEY; | |
2973 | else | |
2974 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2975 | ||
2976 | break; | |
2977 | } | |
2978 | ||
2979 | case _JSON_BUILD_OBJECT_BEGIN: | |
2980 | ||
2981 | if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { | |
2982 | r = -EINVAL; | |
2983 | goto finish; | |
2984 | } | |
2985 | ||
2986 | if (!GREEDY_REALLOC(stack, n_stack_allocated, n_stack+1)) { | |
2987 | r = -ENOMEM; | |
2988 | goto finish; | |
2989 | } | |
2990 | current = stack + n_stack - 1; | |
2991 | ||
2992 | if (current->expect == EXPECT_TOPLEVEL) | |
2993 | current->expect = EXPECT_END; | |
2994 | else if (current->expect == EXPECT_OBJECT_VALUE) | |
2995 | current->expect = EXPECT_OBJECT_KEY; | |
2996 | else | |
2997 | assert(current->expect == EXPECT_ARRAY_ELEMENT); | |
2998 | ||
2999 | stack[n_stack++] = (JsonStack) { | |
3000 | .expect = EXPECT_OBJECT_KEY, | |
319a4f27 LP |
3001 | .n_suppress = current->n_suppress != 0 ? (size_t) -1 : 0, /* if we shall suppress the |
3002 | * new object, then we should | |
3003 | * also suppress all object | |
3004 | * members */ | |
cd0b6c53 LP |
3005 | }; |
3006 | ||
3007 | break; | |
3008 | ||
3009 | case _JSON_BUILD_OBJECT_END: | |
3010 | ||
3011 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3012 | r = -EINVAL; | |
3013 | goto finish; | |
3014 | } | |
3015 | ||
3016 | assert(n_stack > 1); | |
3017 | ||
319a4f27 LP |
3018 | if (current->n_suppress == 0) { |
3019 | r = json_variant_new_object(&add, current->elements, current->n_elements); | |
3020 | if (r < 0) | |
3021 | goto finish; | |
3022 | } | |
3023 | ||
3024 | n_subtract = 1; | |
cd0b6c53 LP |
3025 | |
3026 | json_stack_release(current); | |
3027 | n_stack--, current--; | |
3028 | ||
3029 | break; | |
3030 | ||
3031 | case _JSON_BUILD_PAIR: { | |
3032 | const char *n; | |
3033 | ||
3034 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3035 | r = -EINVAL; | |
3036 | goto finish; | |
3037 | } | |
3038 | ||
3039 | n = va_arg(ap, const char *); | |
3040 | ||
319a4f27 LP |
3041 | if (current->n_suppress == 0) { |
3042 | r = json_variant_new_string(&add, n); | |
3043 | if (r < 0) | |
3044 | goto finish; | |
3045 | } | |
3046 | ||
3047 | n_subtract = 1; | |
3048 | ||
3049 | current->expect = EXPECT_OBJECT_VALUE; | |
3050 | break; | |
3051 | } | |
3052 | ||
3053 | case _JSON_BUILD_PAIR_CONDITION: { | |
3054 | const char *n; | |
3055 | bool b; | |
3056 | ||
3057 | if (current->expect != EXPECT_OBJECT_KEY) { | |
3058 | r = -EINVAL; | |
cd0b6c53 | 3059 | goto finish; |
319a4f27 LP |
3060 | } |
3061 | ||
3062 | b = va_arg(ap, int); | |
3063 | n = va_arg(ap, const char *); | |
3064 | ||
3065 | if (b && current->n_suppress == 0) { | |
3066 | r = json_variant_new_string(&add, n); | |
3067 | if (r < 0) | |
3068 | goto finish; | |
3069 | } | |
3070 | ||
3071 | n_subtract = 1; /* we generated one item */ | |
3072 | ||
3073 | if (!b && current->n_suppress != (size_t) -1) | |
3074 | current->n_suppress += 2; /* Suppress this one and the next item */ | |
cd0b6c53 LP |
3075 | |
3076 | current->expect = EXPECT_OBJECT_VALUE; | |
3077 | break; | |
3078 | }} | |
3079 | ||
319a4f27 LP |
3080 | /* If a variant was generated, add it to our current variant, but only if we are not supposed to suppress additions */ |
3081 | if (add && current->n_suppress == 0) { | |
cd0b6c53 LP |
3082 | if (!GREEDY_REALLOC(current->elements, current->n_elements_allocated, current->n_elements + 1)) { |
3083 | r = -ENOMEM; | |
3084 | goto finish; | |
3085 | } | |
3086 | ||
fcadf032 | 3087 | current->elements[current->n_elements++] = TAKE_PTR(add); |
cd0b6c53 | 3088 | } |
319a4f27 LP |
3089 | |
3090 | /* If we are supposed to suppress items, let's subtract how many items where generated from that | |
3091 | * counter. Except if the counter is (size_t) -1, i.e. we shall suppress an infinite number of elements | |
3092 | * on this stack level */ | |
3093 | if (current->n_suppress != (size_t) -1) { | |
3094 | if (current->n_suppress <= n_subtract) /* Saturated */ | |
3095 | current->n_suppress = 0; | |
3096 | else | |
3097 | current->n_suppress -= n_subtract; | |
3098 | } | |
cd0b6c53 LP |
3099 | } |
3100 | ||
3101 | done: | |
3102 | assert(n_stack == 1); | |
3103 | assert(stack[0].n_elements == 1); | |
3104 | ||
3105 | *ret = json_variant_ref(stack[0].elements[0]); | |
3106 | r = 0; | |
3107 | ||
3108 | finish: | |
3109 | for (i = 0; i < n_stack; i++) | |
3110 | json_stack_release(stack + i); | |
3111 | ||
3112 | free(stack); | |
3113 | ||
cd0b6c53 LP |
3114 | return r; |
3115 | } | |
3116 | ||
3117 | int json_build(JsonVariant **ret, ...) { | |
3118 | va_list ap; | |
3119 | int r; | |
3120 | ||
3121 | va_start(ap, ret); | |
3122 | r = json_buildv(ret, ap); | |
3123 | va_end(ap); | |
3124 | ||
3125 | return r; | |
3126 | } | |
3127 | ||
3128 | int json_log_internal( | |
3129 | JsonVariant *variant, | |
3130 | int level, | |
3131 | int error, | |
3132 | const char *file, | |
3133 | int line, | |
3134 | const char *func, | |
3135 | const char *format, ...) { | |
3136 | ||
3137 | PROTECT_ERRNO; | |
3138 | ||
3139 | unsigned source_line, source_column; | |
3140 | char buffer[LINE_MAX]; | |
3141 | const char *source; | |
3142 | va_list ap; | |
3143 | int r; | |
3144 | ||
fc0f6fbf | 3145 | errno = ERRNO_VALUE(error); |
cd0b6c53 LP |
3146 | |
3147 | va_start(ap, format); | |
3148 | (void) vsnprintf(buffer, sizeof buffer, format, ap); | |
3149 | va_end(ap); | |
3150 | ||
3151 | if (variant) { | |
3152 | r = json_variant_get_source(variant, &source, &source_line, &source_column); | |
3153 | if (r < 0) | |
3154 | return r; | |
3155 | } else { | |
3156 | source = NULL; | |
3157 | source_line = 0; | |
3158 | source_column = 0; | |
3159 | } | |
3160 | ||
3161 | if (source && source_line > 0 && source_column > 0) | |
3162 | return log_struct_internal( | |
3163 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3164 | error, | |
3165 | file, line, func, | |
3166 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3167 | "CONFIG_FILE=%s", source, | |
3168 | "CONFIG_LINE=%u", source_line, | |
3169 | "CONFIG_COLUMN=%u", source_column, | |
13a16a2b | 3170 | LOG_MESSAGE("%s:%u:%u: %s", source, source_line, source_column, buffer), |
cd0b6c53 LP |
3171 | NULL); |
3172 | else | |
3173 | return log_struct_internal( | |
3174 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
3175 | error, | |
3176 | file, line, func, | |
3177 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
3178 | LOG_MESSAGE("%s", buffer), | |
3179 | NULL); | |
3180 | } | |
3181 | ||
3182 | int json_dispatch(JsonVariant *v, const JsonDispatch table[], JsonDispatchCallback bad, JsonDispatchFlags flags, void *userdata) { | |
3183 | const JsonDispatch *p; | |
3184 | size_t i, n, m; | |
3185 | int r, done = 0; | |
3186 | bool *found; | |
3187 | ||
3188 | if (!json_variant_is_object(v)) { | |
3189 | json_log(v, flags, 0, "JSON variant is not an object."); | |
3190 | ||
3191 | if (flags & JSON_PERMISSIVE) | |
3192 | return 0; | |
3193 | ||
3194 | return -EINVAL; | |
3195 | } | |
3196 | ||
3197 | for (p = table, m = 0; p->name; p++) | |
3198 | m++; | |
3199 | ||
3200 | found = newa0(bool, m); | |
3201 | ||
3202 | n = json_variant_elements(v); | |
3203 | for (i = 0; i < n; i += 2) { | |
3204 | JsonVariant *key, *value; | |
3205 | ||
3206 | assert_se(key = json_variant_by_index(v, i)); | |
3207 | assert_se(value = json_variant_by_index(v, i+1)); | |
3208 | ||
3209 | for (p = table; p->name; p++) | |
3210 | if (p->name == (const char*) -1 || | |
3211 | streq_ptr(json_variant_string(key), p->name)) | |
3212 | break; | |
3213 | ||
3214 | if (p->name) { /* Found a matching entry! :-) */ | |
3215 | JsonDispatchFlags merged_flags; | |
3216 | ||
3217 | merged_flags = flags | p->flags; | |
3218 | ||
3219 | if (p->type != _JSON_VARIANT_TYPE_INVALID && | |
3220 | !json_variant_has_type(value, p->type)) { | |
3221 | ||
3222 | json_log(value, merged_flags, 0, | |
3223 | "Object field '%s' has wrong type %s, expected %s.", json_variant_string(key), | |
3224 | json_variant_type_to_string(json_variant_type(value)), json_variant_type_to_string(p->type)); | |
3225 | ||
3226 | if (merged_flags & JSON_PERMISSIVE) | |
3227 | continue; | |
3228 | ||
3229 | return -EINVAL; | |
3230 | } | |
3231 | ||
3232 | if (found[p-table]) { | |
3233 | json_log(value, merged_flags, 0, "Duplicate object field '%s'.", json_variant_string(key)); | |
3234 | ||
3235 | if (merged_flags & JSON_PERMISSIVE) | |
3236 | continue; | |
3237 | ||
3238 | return -ENOTUNIQ; | |
3239 | } | |
3240 | ||
3241 | found[p-table] = true; | |
3242 | ||
3243 | if (p->callback) { | |
3244 | r = p->callback(json_variant_string(key), value, merged_flags, (uint8_t*) userdata + p->offset); | |
3245 | if (r < 0) { | |
3246 | if (merged_flags & JSON_PERMISSIVE) | |
3247 | continue; | |
3248 | ||
3249 | return r; | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | done ++; | |
3254 | ||
3255 | } else { /* Didn't find a matching entry! :-( */ | |
3256 | ||
3257 | if (bad) { | |
3258 | r = bad(json_variant_string(key), value, flags, userdata); | |
3259 | if (r < 0) { | |
3260 | if (flags & JSON_PERMISSIVE) | |
3261 | continue; | |
3262 | ||
3263 | return r; | |
3264 | } else | |
3265 | done ++; | |
3266 | ||
3267 | } else { | |
3268 | json_log(value, flags, 0, "Unexpected object field '%s'.", json_variant_string(key)); | |
3269 | ||
3270 | if (flags & JSON_PERMISSIVE) | |
3271 | continue; | |
3272 | ||
3273 | return -EADDRNOTAVAIL; | |
3274 | } | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | for (p = table; p->name; p++) { | |
3279 | JsonDispatchFlags merged_flags = p->flags | flags; | |
3280 | ||
3281 | if ((merged_flags & JSON_MANDATORY) && !found[p-table]) { | |
3282 | json_log(v, merged_flags, 0, "Missing object field '%s'.", p->name); | |
3283 | ||
3284 | if ((merged_flags & JSON_PERMISSIVE)) | |
3285 | continue; | |
3286 | ||
3287 | return -ENXIO; | |
3288 | } | |
3289 | } | |
3290 | ||
3291 | return done; | |
3292 | } | |
3293 | ||
3294 | int json_dispatch_boolean(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3295 | bool *b = userdata; | |
3296 | ||
3297 | assert(variant); | |
3298 | assert(b); | |
3299 | ||
3300 | if (!json_variant_is_boolean(variant)) { | |
3301 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3302 | return -EINVAL; | |
3303 | } | |
3304 | ||
3305 | *b = json_variant_boolean(variant); | |
3306 | return 0; | |
3307 | } | |
3308 | ||
3309 | int json_dispatch_tristate(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3310 | int *b = userdata; | |
3311 | ||
3312 | assert(variant); | |
3313 | assert(b); | |
3314 | ||
3315 | if (!json_variant_is_boolean(variant)) { | |
3316 | json_log(variant, flags, 0, "JSON field '%s' is not a boolean.", strna(name)); | |
3317 | return -EINVAL; | |
3318 | } | |
3319 | ||
3320 | *b = json_variant_boolean(variant); | |
3321 | return 0; | |
3322 | } | |
3323 | ||
3324 | int json_dispatch_integer(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3325 | intmax_t *i = userdata; | |
3326 | ||
3327 | assert(variant); | |
3328 | assert(i); | |
3329 | ||
3330 | if (!json_variant_is_integer(variant)) { | |
3331 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3332 | return -EINVAL; | |
3333 | } | |
3334 | ||
3335 | *i = json_variant_integer(variant); | |
3336 | return 0; | |
3337 | } | |
3338 | ||
3339 | int json_dispatch_unsigned(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3340 | uintmax_t *u = userdata; | |
3341 | ||
3342 | assert(variant); | |
3343 | assert(u); | |
3344 | ||
3345 | if (!json_variant_is_unsigned(variant)) { | |
3346 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3347 | return -EINVAL; | |
3348 | } | |
3349 | ||
3350 | *u = json_variant_unsigned(variant); | |
3351 | return 0; | |
3352 | } | |
3353 | ||
3354 | int json_dispatch_uint32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3355 | uint32_t *u = userdata; | |
3356 | ||
3357 | assert(variant); | |
3358 | assert(u); | |
3359 | ||
3360 | if (!json_variant_is_unsigned(variant)) { | |
3361 | json_log(variant, flags, 0, "JSON field '%s' is not an unsigned integer.", strna(name)); | |
3362 | return -EINVAL; | |
3363 | } | |
3364 | ||
3365 | if (json_variant_unsigned(variant) > UINT32_MAX) { | |
3366 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3367 | return -ERANGE; | |
3368 | } | |
3369 | ||
3370 | *u = (uint32_t) json_variant_unsigned(variant); | |
3371 | return 0; | |
3372 | } | |
3373 | ||
3374 | int json_dispatch_int32(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3375 | int32_t *i = userdata; | |
3376 | ||
3377 | assert(variant); | |
3378 | assert(i); | |
3379 | ||
3380 | if (!json_variant_is_integer(variant)) { | |
3381 | json_log(variant, flags, 0, "JSON field '%s' is not an integer.", strna(name)); | |
3382 | return -EINVAL; | |
3383 | } | |
3384 | ||
3385 | if (json_variant_integer(variant) < INT32_MIN || json_variant_integer(variant) > INT32_MAX) { | |
3386 | json_log(variant, flags, 0, "JSON field '%s' out of bounds.", strna(name)); | |
3387 | return -ERANGE; | |
3388 | } | |
3389 | ||
3390 | *i = (int32_t) json_variant_integer(variant); | |
3391 | return 0; | |
3392 | } | |
3393 | ||
3394 | int json_dispatch_string(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3395 | char **s = userdata; | |
3396 | int r; | |
3397 | ||
3398 | assert(variant); | |
3399 | assert(s); | |
3400 | ||
3401 | if (json_variant_is_null(variant)) { | |
3402 | *s = mfree(*s); | |
3403 | return 0; | |
3404 | } | |
3405 | ||
3406 | if (!json_variant_is_string(variant)) { | |
3407 | json_log(variant, flags, 0, "JSON field '%s' is not a string.", strna(name)); | |
3408 | return -EINVAL; | |
3409 | } | |
3410 | ||
3411 | r = free_and_strdup(s, json_variant_string(variant)); | |
3412 | if (r < 0) | |
3413 | return json_log(variant, flags, r, "Failed to allocate string: %m"); | |
3414 | ||
3415 | return 0; | |
3416 | } | |
3417 | ||
3418 | int json_dispatch_strv(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3419 | _cleanup_strv_free_ char **l = NULL; | |
3420 | char ***s = userdata; | |
3421 | size_t i; | |
3422 | int r; | |
3423 | ||
3424 | assert(variant); | |
3425 | assert(s); | |
3426 | ||
3427 | if (json_variant_is_null(variant)) { | |
3428 | *s = strv_free(*s); | |
3429 | return 0; | |
3430 | } | |
3431 | ||
3432 | if (!json_variant_is_array(variant)) { | |
3433 | json_log(variant, 0, flags, "JSON field '%s' is not an array.", strna(name)); | |
3434 | return -EINVAL; | |
3435 | } | |
3436 | ||
3437 | for (i = 0; i < json_variant_elements(variant); i++) { | |
3438 | JsonVariant *e; | |
3439 | ||
3440 | assert_se(e = json_variant_by_index(variant, i)); | |
3441 | ||
3442 | if (!json_variant_is_string(e)) { | |
3443 | json_log(e, 0, flags, "JSON array element is not a string."); | |
3444 | return -EINVAL; | |
3445 | } | |
3446 | ||
3447 | r = strv_extend(&l, json_variant_string(e)); | |
3448 | if (r < 0) | |
3449 | return json_log(variant, flags, r, "Failed to append array element: %m"); | |
3450 | } | |
3451 | ||
3452 | strv_free_and_replace(*s, l); | |
3453 | return 0; | |
3454 | } | |
3455 | ||
3456 | int json_dispatch_variant(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) { | |
3457 | JsonVariant **p = userdata; | |
3458 | ||
3459 | assert(variant); | |
3460 | assert(p); | |
3461 | ||
3462 | json_variant_unref(*p); | |
3463 | *p = json_variant_ref(variant); | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { | |
3469 | [JSON_VARIANT_STRING] = "string", | |
3470 | [JSON_VARIANT_INTEGER] = "integer", | |
3471 | [JSON_VARIANT_UNSIGNED] = "unsigned", | |
3472 | [JSON_VARIANT_REAL] = "real", | |
3473 | [JSON_VARIANT_NUMBER] = "number", | |
3474 | [JSON_VARIANT_BOOLEAN] = "boolean", | |
3475 | [JSON_VARIANT_ARRAY] = "array", | |
3476 | [JSON_VARIANT_OBJECT] = "object", | |
3477 | [JSON_VARIANT_NULL] = "null", | |
3478 | }; | |
3479 | ||
3480 | DEFINE_STRING_TABLE_LOOKUP(json_variant_type, JsonVariantType); |