libwebsockets
Lightweight C library for HTML5 websockets
lws-lecp.h
Go to the documentation of this file.
1 /*
2  * libwebsockets - small server side websockets and web server implementation
3  *
4  * Copyright (C) 2010 - 2021 Andy Green <andy@warmcat.com>
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to
8  * deal in the Software without restriction, including without limitation the
9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10  * sell copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
34 
35 #ifndef LECP_MAX_PARSING_STACK_DEPTH
36 #define LECP_MAX_PARSING_STACK_DEPTH 5
37 #endif
38 #ifndef LECP_MAX_DEPTH
39 #define LECP_MAX_DEPTH 12
40 #endif
41 #ifndef LECP_MAX_INDEX_DEPTH
42 #define LECP_MAX_INDEX_DEPTH 8
43 #endif
44 #ifndef LECP_MAX_PATH
45 #define LECP_MAX_PATH 128
46 #endif
47 #ifndef LECP_STRING_CHUNK
48 /* must be >= 30 to assemble floats */
49 #define LECP_STRING_CHUNK 254
50 #endif
51 
52 #define LECP_FLAG_CB_IS_VALUE 64
53 
54 /*
55  * CBOR initial byte 3 x MSB bits are these
56  */
57 
58 enum {
66  LWS_CBOR_MAJTYP_FLOAT = 7 << 5, /* also BREAK */
67 
69 
70  /*
71  * For the low 5 bits of the opcode, 0-23 are literals, unless it's
72  * FLOAT.
73  *
74  * 24 = 1 byte; 25 = 2..., 26 = 4... and 27 = 8 bytes following literal.
75  */
76  LWS_CBOR_1 = 24,
77  LWS_CBOR_2 = 25,
78  LWS_CBOR_4 = 26,
79  LWS_CBOR_8 = 27,
80 
82 
84 
85  /*
86  * Major type 7 discriminators in low 5 bits
87  * 0 - 23 is SIMPLE implicit value (like, eg, LWS_CBOR_SWK_TRUE)
88  */
93 
94  LWS_CBOR_M7_SUBTYP_SIMPLE_X8 = 24, /* simple with additional byte */
99 
100 /* 28, 29, 30 are illegal.
101  *
102  * 31 is illegal for UINT, INT_NEG, and TAG;
103  * for BSTR, TSTR, ARRAY and MAP it means "indefinite length", ie,
104  * it's made up of an endless amount of determinite-length
105  * fragments terminated with a BREAK (FLOAT | 31) instead of the
106  * next determinite-length fragment. The second framing level
107  * means no need for escapes for BREAK in the data.
108  */
109 
111 
112 /*
113  * Well-known tags
114  */
115 
117  LWS_CBOR_WKTAG_DATETIME_EPOCH = 1, /* int or float */
118  LWS_CBOR_WKTAG_BIGNUM_UNSIGNED = 2, /* byte string */
119  LWS_CBOR_WKTAG_BIGNUM_NEGATIVE = 3, /* byte string */
121  LWS_CBOR_WKTAG_BIGFLOAT = 5, /* array */
122 
126 
127  LWS_CBOR_WKTAG_TO_B64U = 21, /* any */
128  LWS_CBOR_WKTAG_TO_B64 = 22, /* any */
129  LWS_CBOR_WKTAG_TO_B16 = 23, /* any */
130  LWS_CBOR_WKTAG_CBOR = 24, /* byte string */
131 
132  LWS_CBOR_WKTAG_URI = 32, /* text string */
133  LWS_CBOR_WKTAG_B64U = 33, /* text string */
134  LWS_CBOR_WKTAG_B64 = 34, /* text string */
135  LWS_CBOR_WKTAG_MIME = 36, /* text string */
136 
140 
142 };
143 
147 
150 
152 
158  LECPCB_VAL_STR_START = 11, /* notice handle separately */
161 
164 
167 
170 
176 
178 
179  LECPCB_VAL_BLOB_START = 26, /* notice handle separately */
182 
185 
187 };
188 
195 };
196 
197 
198 struct lecp_item {
199  union {
200  uint64_t u64;
201  int64_t i64;
202 
203  uint64_t u32;
204 
205  uint16_t hf;
206 #if defined(LWS_WITH_CBOR_FLOAT)
207  float f;
208  double d;
209 #else
210  uint32_t f;
211  uint64_t d;
212 #endif
213  } u;
215 };
216 
217 struct lecp_ctx;
218 typedef signed char (*lecp_callback)(struct lecp_ctx *ctx, char reason);
219 
220 struct _lecp_stack {
221  char s; /* lejp_state stack*/
222  uint8_t p; /* path length */
223  char i; /* index array length */
224  char indet; /* indeterminite */
225  char intermediate; /* in middle of string */
226 
227  char pop_iss;
228  uint64_t tag;
229  uint64_t collect_rem;
234 };
235 
237  void *user; /* private to the stack level */
239  const char * const *paths;
243 };
244 
245 struct lecp_ctx {
246 
247  /* sorted by type for most compact alignment
248  *
249  * pointers
250  */
251  void *user;
253 
254  /* arrays */
255 
257  struct _lecp_stack st[LECP_MAX_DEPTH];
258  uint16_t i[LECP_MAX_INDEX_DEPTH]; /* index array */
259  uint16_t wild[LECP_MAX_INDEX_DEPTH]; /* index array */
261  uint8_t cbor[64]; /* literal cbor capture */
262 
263  struct lecp_item item;
264 
265 
266  /* size_t */
267 
268  size_t path_stride; /* 0 means default ptr size, else
269  * stride... allows paths to be
270  * provided composed inside a
271  * larger user struct instead of a
272  * duplicated array */
273  size_t used_in; /* bytes of input consumed */
274 
275  /* short */
276 
278 
279  /* char */
280 
284  uint8_t sp; /* stack head */
285  uint8_t ipos; /* index stack depth */
290  uint8_t pst_sp; /* parsing stack head */
294  char present; /* temp for cb reason to use */
295 
296  uint8_t be; /* big endian */
297 
298  /* at end so we can memset the rest of it */
299 
301 };
302 
305  LWS_LECPCTX_RET_AGAIN, /* call again to continue writing buffer */
306  LWS_LECPCTX_RET_FAIL /* something broken, eg, format string */
307 };
308 
309 enum cbp_state {
314 
316 
318 
320 
322 };
323 
324 typedef struct lws_lec_pctx {
329  uint8_t *start; /* the beginning of the out buf */
330  uint8_t *buf; /* cur pos in output buf */
331  uint8_t *end; /* the end of the output buf */
332 
334  uint64_t ongoing_len;
335  uint64_t ongoing_done;
336 
337  struct lecp_item item;
338 
339  size_t used; /* number of bytes valid from start */
340 
341  int opaque[4]; /* ignored by lws, caller may use */
342 
343  enum cbp_state state;
344  unsigned int fmt_pos;
352 
354 lws_lec_int(lws_lec_pctx_t *ctx, uint8_t opcode, uint8_t indet, uint64_t num);
355 
358 
359 /*
360  * lws_lec_init() - prepare a cbor writing context
361  *
362  * \param ctx: the cbor writing context to prepare
363  * \param buf: the output buffer start
364  * \param len: the amount of the output buffer we can use
365  *
366  * Prepares a cbor writing context so that les_lec_printf can be used to
367  * write into it.
368  */
370 lws_lec_init(lws_lec_pctx_t *ctx, uint8_t *buf, size_t len);
371 
372 /*
373  * lws_lec_setbuf() - update the output buffer for an initialized cbor writing ctx
374  *
375  * \param ctx: the cbor writing context to prepare
376  * \param buf: the output buffer start
377  * \param len: the amount of the output buffer we can use
378  *
379  * Leaves the cbor writing context state as it is, but resets the output buffer
380  * it writes into as given in \p buf and \p len
381  */
383 lws_lec_setbuf(lws_lec_pctx_t *ctx, uint8_t *buf, size_t len);
384 
385 /*
386  * lws_lec_vsprintf() - write into a cbor writing context
387  *
388  * \param ctx: the cbor writing context to prepare
389  * \param format: a printf style argument map
390  * \param args: the va args
391  *
392  * CBOR-aware vsprintf which pauses output when it fills the output buffer. You
393  * can call it again with the same args and same lws_lex_pctx to resume filling
394  *
395  * Returns either LWS_LECPCTX_RET_FINISHED if we have nothing left over that we
396  * want to put in the buffer, or LWS_LECPCTX_RET_AGAIN if the function should
397  * be called again with the same arguments (perhaps into a different output
398  * buffer) to continue emitting output from where it left off.
399  *
400  * If LWS_LECPCTX_RET_AGAIN is returned, lws_lec_setbuf() must be used on the
401  * context to reset or change the output buffer before calling again.
402  *
403  * The number of bytes placed in the output buffer is available in ctx->used.
404  *
405  * \p format is a printf-type format string that is specialized for CBOR
406  * generation. It understands the following specifiers
407  *
408  * |`123`||unsigned literal number|
409  * |`-123`||signed literal number|
410  * |`%u`|`unsigned int`|number|
411  * |`%lu`|`unsigned long int`|number|
412  * |`%llu`|`unsigned long long int`|number|
413  * |`%d`|`signed int`|number|
414  * |`%ld`|`signed long int`|number|
415  * |`%lld`|`signed long long int`|number|
416  * |`%f`|`double`|floating point number|
417  * |`123(...)`||literal tag and scope|
418  * |`%t(...)`|`unsigned int`|tag and scope|
419  * |`%lt(...)`|`unsigned long int`|tag and scope|
420  * |`%llt(...)`|`unsigned long long int`|tag and scope|
421  * |`[...]`||Array (fixed len if `]` in same format string)|
422  * |`{...}`||Map (fixed len if `}` in same format string)|
423  * |`<t...>`||Container for indeterminite text string frags|
424  * |`<b...>`||Container for indeterminite binary string frags|
425  * |`'string'`||Literal text of known length|
426  * |`%s`|`const char *`|NUL-terminated string|
427  * |`%.*s`|`int`, `const char *`|length-specified string|
428  * |`%.*b`|`int`, `const uint8_t *`|length-specified binary|
429  * |`:`||separator between Map items (a:b)|
430  * |`,`||separator between Map pairs or array items|
431  *
432  * See READMEs/README.cbor-lecp.md for more details.
433  */
435 lws_lec_vsprintf(lws_lec_pctx_t *ctx, const char *format, va_list args);
436 
437 /*
438  * lws_lec_printf() - write into a cbor writing context
439  *
440  * \param ctx: the cbor writing context to prepare
441  * \param format: a printf style argument map
442  * \param ...: format args
443  *
444  * See lws_lec_vsprintf() for format details. This is the most common way
445  * to format the CBOR output.
446  *
447  * See READMEs/README.cbor-lecp.md for more details.
448  */
450 lws_lec_printf(lws_lec_pctx_t *ctx, const char *format, ...);
451 
464 lecp_construct(struct lecp_ctx *ctx, lecp_callback cb, void *user,
465  const char * const *paths, unsigned char paths_count);
466 
473 lecp_destruct(struct lecp_ctx *ctx);
474 
489 lecp_parse(struct lecp_ctx *ctx, const uint8_t *cbor, size_t len);
490 
493 
494 LWS_VISIBLE LWS_EXTERN const char *
496 
512 lecp_parse_report_raw(struct lecp_ctx *ctx, int on);
513 
525 
527 lecp_parse_subtree(struct lecp_ctx *ctx, const uint8_t *in, size_t len);
528 
529 /*
530  * Helpers for half-float
531  */
532 
535 
538 
unsigned short uint16_t
unsigned int uint32_t
#define LWS_EXTERN
unsigned char uint8_t
#define LWS_VISIBLE
LWS_VISIBLE LWS_EXTERN void lws_lec_int(lws_lec_pctx_t *ctx, uint8_t opcode, uint8_t indet, uint64_t num)
union lecp_item::@19 u
lecp_callbacks
Definition: lws-lecp.h:144
@ LECPCB_VAL_BLOB_CHUNK
Definition: lws-lecp.h:180
@ LECPCB_VAL_BLOB_END
Definition: lws-lecp.h:181
@ LECPCB_VAL_NUM_INT
Definition: lws-lecp.h:156
@ LECPCB_TAG_START
Definition: lws-lecp.h:168
@ LECPCB_VAL_FLOAT32
Definition: lws-lecp.h:174
@ LECPCB_CONSTRUCTED
Definition: lws-lecp.h:145
@ LECPCB_COMPLETE
Definition: lws-lecp.h:148
@ LECPCB_ARRAY_ITEM_START
Definition: lws-lecp.h:183
@ LECPCB_VAL_STR_CHUNK
Definition: lws-lecp.h:159
@ LECPCB_VAL_TRUE
Definition: lws-lecp.h:153
@ LECPCB_VAL_RESERVED
Definition: lws-lecp.h:157
@ LECPCB_VAL_BLOB_START
Definition: lws-lecp.h:179
@ LECPCB_OBJECT_START
Definition: lws-lecp.h:165
@ LECPCB_VAL_STR_START
Definition: lws-lecp.h:158
@ LECPCB_VAL_STR_END
Definition: lws-lecp.h:160
@ LECPCB_ARRAY_START
Definition: lws-lecp.h:162
@ LECPCB_VAL_NUM_UINT
Definition: lws-lecp.h:171
@ LECPCB_VAL_FLOAT16
Definition: lws-lecp.h:173
@ LECPCB_DESTRUCTED
Definition: lws-lecp.h:146
@ LECPCB_VAL_UNDEFINED
Definition: lws-lecp.h:172
@ LECPCB_ARRAY_ITEM_END
Definition: lws-lecp.h:184
@ LECPCB_VAL_FLOAT64
Definition: lws-lecp.h:175
@ LECPCB_FAILED
Definition: lws-lecp.h:149
@ LECPCB_LITERAL_CBOR
Definition: lws-lecp.h:186
@ LECPCB_PAIR_NAME
Definition: lws-lecp.h:151
@ LECPCB_OBJECT_END
Definition: lws-lecp.h:166
@ LECPCB_VAL_FALSE
Definition: lws-lecp.h:154
@ LECPCB_ARRAY_END
Definition: lws-lecp.h:163
@ LECPCB_VAL_NULL
Definition: lws-lecp.h:155
@ LECPCB_VAL_SIMPLE
Definition: lws-lecp.h:177
@ LECPCB_TAG_END
Definition: lws-lecp.h:169
struct lws_lec_pctx lws_lec_pctx_t
const char *const * paths
Definition: lws-lecp.h:239
uint32_t ordinal
Definition: lws-lecp.h:230
char indet
Definition: lws-lecp.h:224
uint8_t p
Definition: lws-lecp.h:222
LWS_VISIBLE LWS_EXTERN enum lws_lec_pctx_ret lws_lec_vsprintf(lws_lec_pctx_t *ctx, const char *format, va_list args)
char path[LECP_MAX_PATH]
Definition: lws-lecp.h:260
uint8_t pst_sp
Definition: lws-lecp.h:290
LWS_VISIBLE LWS_EXTERN void lws_lec_init(lws_lec_pctx_t *ctx, uint8_t *buf, size_t len)
LWS_VISIBLE LWS_EXTERN int lecp_parse_map_is_key(struct lecp_ctx *ctx)
uint8_t count_paths
Definition: lws-lecp.h:240
LWS_VISIBLE LWS_EXTERN void lecp_construct(struct lecp_ctx *ctx, lecp_callback cb, void *user, const char *const *paths, unsigned char paths_count)
uint8_t ipos
Definition: lws-lecp.h:285
uint8_t npos
Definition: lws-lecp.h:281
struct lecp_item item
Definition: lws-lecp.h:337
char intermediate
Definition: lws-lecp.h:225
uint64_t collect_rem
Definition: lws-lecp.h:229
uint8_t opcode
Definition: lws-lecp.h:214
#define LECP_MAX_DEPTH
Definition: lws-lecp.h:39
char pop_iss
Definition: lws-lecp.h:227
uint8_t * collect_tgt
Definition: lws-lecp.h:252
uint8_t vaa[16]
Definition: lws-lecp.h:326
#define LECP_STRING_CHUNK
Definition: lws-lecp.h:49
unsigned int fmt_pos
Definition: lws-lecp.h:344
struct _lecp_parsing_stack pst[LECP_MAX_PARSING_STACK_DEPTH]
Definition: lws-lecp.h:256
size_t used
Definition: lws-lecp.h:339
signed char(* lecp_callback)(struct lecp_ctx *ctx, char reason)
Definition: lws-lecp.h:218
size_t path_stride
Definition: lws-lecp.h:268
uint8_t path_match
Definition: lws-lecp.h:242
uint64_t ongoing_done
Definition: lws-lecp.h:335
uint8_t dotstar
Definition: lws-lecp.h:350
LWS_VISIBLE LWS_EXTERN void lecp_parse_report_raw(struct lecp_ctx *ctx, int on)
lws_lec_pctx_ret
Definition: lws-lecp.h:303
@ LWS_LECPCTX_RET_AGAIN
Definition: lws-lecp.h:305
@ LWS_LECPCTX_RET_FAIL
Definition: lws-lecp.h:306
@ LWS_LECPCTX_RET_FINISHED
Definition: lws-lecp.h:304
@ LWS_CBOR_WKTAG_COSE_SIGN
Definition: lws-lecp.h:139
@ LWS_CBOR_MAJTYP_BSTR
Definition: lws-lecp.h:61
@ LWS_CBOR_MAJTYP_MASK
Definition: lws-lecp.h:68
@ LWS_CBOR_1
Definition: lws-lecp.h:76
@ LWS_CBOR_SWK_FALSE
Definition: lws-lecp.h:89
@ LWS_CBOR_WKTAG_COSE_MAC0
Definition: lws-lecp.h:124
@ LWS_CBOR_2
Definition: lws-lecp.h:77
@ LWS_CBOR_RESERVED
Definition: lws-lecp.h:81
@ LWS_CBOR_WKTAG_MIME
Definition: lws-lecp.h:135
@ LWS_CBOR_SWK_UNDEFINED
Definition: lws-lecp.h:92
@ LWS_CBOR_MAJTYP_TAG
Definition: lws-lecp.h:65
@ LWS_CBOR_M7_SUBTYP_SIMPLE_X8
Definition: lws-lecp.h:94
@ LWS_CBOR_WKTAG_BIGNUM_NEGATIVE
Definition: lws-lecp.h:119
@ LWS_CBOR_INDETERMINITE
Definition: lws-lecp.h:110
@ LWS_CBOR_M7_SUBTYP_FLOAT32
Definition: lws-lecp.h:96
@ LWS_CBOR_MAJTYP_UINT
Definition: lws-lecp.h:59
@ LWS_CBOR_8
Definition: lws-lecp.h:79
@ LWS_CBOR_SWK_TRUE
Definition: lws-lecp.h:90
@ LWS_CBOR_WKTAG_SELFDESCCBOR
Definition: lws-lecp.h:141
@ LWS_CBOR_M7_SUBTYP_FLOAT16
Definition: lws-lecp.h:95
@ LWS_CBOR_MAJTYP_ARRAY
Definition: lws-lecp.h:63
@ LWS_CBOR_WKTAG_COSE_MAC
Definition: lws-lecp.h:138
@ LWS_CBOR_WKTAG_DATETIME_STD
Definition: lws-lecp.h:116
@ LWS_CBOR_WKTAG_CBOR
Definition: lws-lecp.h:130
@ LWS_CBOR_MAJTYP_TSTR
Definition: lws-lecp.h:62
@ LWS_CBOR_WKTAG_TO_B64
Definition: lws-lecp.h:128
@ LWS_CBOR_WKTAG_COSE_ENC0
Definition: lws-lecp.h:123
@ LWS_CBOR_WKTAG_B64
Definition: lws-lecp.h:134
@ LWS_CBOR_WKTAG_TO_B64U
Definition: lws-lecp.h:127
@ LWS_CBOR_WKTAG_DECIMAL_FRAC
Definition: lws-lecp.h:120
@ LWS_CBOR_MAJTYP_INT_NEG
Definition: lws-lecp.h:60
@ LWS_CBOR_WKTAG_DATETIME_EPOCH
Definition: lws-lecp.h:117
@ LWS_CBOR_MAJTYP_MAP
Definition: lws-lecp.h:64
@ LWS_CBOR_SWK_NULL
Definition: lws-lecp.h:91
@ LWS_CBOR_4
Definition: lws-lecp.h:78
@ LWS_CBOR_WKTAG_BIGNUM_UNSIGNED
Definition: lws-lecp.h:118
@ LWS_CBOR_WKTAG_COSE_SIGN1
Definition: lws-lecp.h:125
@ LWS_CBOR_WKTAG_TO_B16
Definition: lws-lecp.h:129
@ LWS_CBOR_MAJTYP_FLOAT
Definition: lws-lecp.h:66
@ LWS_CBOR_SUBMASK
Definition: lws-lecp.h:83
@ LWS_CBOR_WKTAG_B64U
Definition: lws-lecp.h:133
@ LWS_CBOR_WKTAG_BIGFLOAT
Definition: lws-lecp.h:121
@ LWS_CBOR_M7_SUBTYP_FLOAT64
Definition: lws-lecp.h:97
@ LWS_CBOR_WKTAG_COSE_ENC
Definition: lws-lecp.h:137
@ LWS_CBOR_WKTAG_URI
Definition: lws-lecp.h:132
@ LWS_CBOR_M7_BREAK
Definition: lws-lecp.h:98
uint8_t _long
Definition: lws-lecp.h:348
uint8_t outer_array
Definition: lws-lecp.h:291
size_t used_in
Definition: lws-lecp.h:273
struct _lecp_stack st[LECP_MAX_DEPTH]
Definition: lws-lecp.h:257
LWS_VISIBLE LWS_EXTERN void lws_lec_setbuf(lws_lec_pctx_t *ctx, uint8_t *buf, size_t len)
struct lecp_item item
Definition: lws-lecp.h:263
LWS_VISIBLE LWS_EXTERN int lecp_parse_subtree(struct lecp_ctx *ctx, const uint8_t *in, size_t len)
LWS_VISIBLE LWS_EXTERN void lws_halfp2singles(uint32_t *xp, uint16_t h)
uint8_t wildcount
Definition: lws-lecp.h:289
const uint8_t * ongoing_src
Definition: lws-lecp.h:333
lecp_callback cb
Definition: lws-lecp.h:238
uint8_t sp
Definition: lws-lecp.h:345
uint8_t path_match
Definition: lws-lecp.h:287
uint16_t wild[LECP_MAX_INDEX_DEPTH]
Definition: lws-lecp.h:259
uint8_t f
Definition: lws-lecp.h:283
uint8_t vaa_pos
Definition: lws-lecp.h:349
int opaque[4]
Definition: lws-lecp.h:341
uint8_t literal_cbor_report
Definition: lws-lecp.h:293
void * user
Definition: lws-lecp.h:251
uint64_t ongoing_len
Definition: lws-lecp.h:334
uint8_t send_new_array_item
Definition: lws-lecp.h:232
uint8_t scratch[24]
Definition: lws-lecp.h:328
uint8_t * buf
Definition: lws-lecp.h:330
uint8_t sp
Definition: lws-lecp.h:284
LWS_VISIBLE LWS_EXTERN enum lws_lec_pctx_ret lws_lec_printf(lws_lec_pctx_t *ctx, const char *format,...)
uint8_t opcode
Definition: lws-lecp.h:231
char present
Definition: lws-lecp.h:294
uint8_t cbor[64]
Definition: lws-lecp.h:261
uint8_t path_match_len
Definition: lws-lecp.h:288
LWS_VISIBLE LWS_EXTERN int lws_lec_scratch(lws_lec_pctx_t *ctx)
uint16_t i[LECP_MAX_INDEX_DEPTH]
Definition: lws-lecp.h:258
uint8_t dcount
Definition: lws-lecp.h:282
#define LECP_MAX_PATH
Definition: lws-lecp.h:45
LWS_VISIBLE LWS_EXTERN void lecp_change_callback(struct lecp_ctx *ctx, lecp_callback cb)
uint8_t * end
Definition: lws-lecp.h:331
enum cbp_state state
Definition: lws-lecp.h:343
LWS_VISIBLE LWS_EXTERN const char * lecp_error_to_string(int e)
uint8_t scratch_len
Definition: lws-lecp.h:346
LWS_VISIBLE LWS_EXTERN void lecp_destruct(struct lecp_ctx *ctx)
uint8_t cbor_pos
Definition: lws-lecp.h:292
uint8_t * start
Definition: lws-lecp.h:329
char buf[LECP_STRING_CHUNK+1]
Definition: lws-lecp.h:300
cbp_state
Definition: lws-lecp.h:309
@ CBPS_PC2
Definition: lws-lecp.h:312
@ CBPS_CONTYPE
Definition: lws-lecp.h:321
@ CBPS_STRING_BODY
Definition: lws-lecp.h:315
@ CBPS_NUM_LIT
Definition: lws-lecp.h:317
@ CBPS_STRING_LIT
Definition: lws-lecp.h:319
@ CBPS_PC3
Definition: lws-lecp.h:313
@ CBPS_PC1
Definition: lws-lecp.h:311
@ CBPS_IDLE
Definition: lws-lecp.h:310
#define LECP_FLAG_CB_IS_VALUE
Definition: lws-lecp.h:52
uint8_t indet[16]
Definition: lws-lecp.h:327
uint8_t barrier
Definition: lws-lecp.h:233
#define LECP_MAX_PARSING_STACK_DEPTH
Definition: lws-lecp.h:36
uint16_t uni
Definition: lws-lecp.h:277
uint8_t stack[16]
Definition: lws-lecp.h:325
uint8_t count_paths
Definition: lws-lecp.h:286
uint8_t be
Definition: lws-lecp.h:296
uint64_t tag
Definition: lws-lecp.h:228
LWS_VISIBLE LWS_EXTERN int lecp_parse(struct lecp_ctx *ctx, const uint8_t *cbor, size_t len)
uint8_t escflag
Definition: lws-lecp.h:347
lecp_reasons
Definition: lws-lecp.h:189
@ LECP_REJECT_UNKNOWN
Definition: lws-lecp.h:192
@ LECP_CONTINUE
Definition: lws-lecp.h:190
@ LECP_REJECT_BAD_CODING
Definition: lws-lecp.h:191
@ LECP_STACK_OVERFLOW
Definition: lws-lecp.h:194
@ LECP_REJECT_CALLBACK
Definition: lws-lecp.h:193
LWS_VISIBLE LWS_EXTERN void lws_singles2halfp(uint16_t *hp, uint32_t x)
#define LECP_MAX_INDEX_DEPTH
Definition: lws-lecp.h:42