lib/libc/iconv/citrus_prop.c

   1 /* $NetBSD: citrus_prop.c,v 1.4 2011/03/30 08:22:01 jruoho Exp $ */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-2-Clause
   5  *
   6  * Copyright (c)2006 Citrus Project,
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  */
  31
  32
  33 #include <assert.h>
  34 #include <errno.h>
  35 #include <limits.h>
  36 #include <stdbool.h>
  37 #include <stddef.h>
  38 #include <stdio.h>
  39 #include <stdint.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #include "citrus_namespace.h"
  44 #include "citrus_bcs.h"
  45 #include "citrus_region.h"
  46 #include "citrus_memstream.h"
  47 #include "citrus_prop.h"
  48
  49 typedef struct {
  50         _citrus_prop_type_t type;
  51         union {
  52                 const char *str;
  53                 int chr;
  54                 bool boolean;
  55                 uint64_t num;
  56         } u;
  57 } _citrus_prop_object_t;
  58
  59 static __inline void
  60 _citrus_prop_object_init(_citrus_prop_object_t *obj, _citrus_prop_type_t type)
  61 {
  62
  63         obj->type = type;
  64         memset(&obj->u, 0, sizeof(obj->u));
  65 }
  66
  67 static __inline void
  68 _citrus_prop_object_uninit(_citrus_prop_object_t *obj)
  69 {
  70
  71         if (obj->type == _CITRUS_PROP_STR)
  72                 free(__DECONST(void *, obj->u.str));
  73 }
  74
  75 static const char *xdigit = "0123456789ABCDEF";
  76
  77 #define _CITRUS_PROP_READ_UINT_COMMON(_func_, _type_, _max_)            \
  78 static int                                                              \
  79 _citrus_prop_read_##_func_##_common(struct _memstream * __restrict ms,  \
  80     _type_ * __restrict result, int base, int neg)                      \
  81 {                                                                       \
  82         _type_ acc, cutoff;                                             \
  83         int ch, cutlim, n;                                              \
  84         char *p;                                                        \
  85                                                                         \
  86         acc = (_type_)0;                                                \
  87         cutoff = _max_ / base;                                          \
  88         cutlim = _max_ % base;                                          \
  89         for (;;) {                                                      \
  90                 ch = _memstream_getc(ms);                               \
  91                 p = strchr(xdigit, _bcs_toupper(ch));                   \
  92                 if (p == NULL || (n = (p - xdigit)) >= base)            \
  93                         break;                                          \
  94                 if (acc > cutoff || (acc == cutoff && n > cutlim))      \
  95                         break;                                          \
  96                 acc *= base;                                            \
  97                 acc += n;                                               \
  98         }                                                               \
  99         _memstream_ungetc(ms, ch);                                      \
 100         *result = neg ? -acc : acc;                                     \
 101         return (0);                                                     \
 102 }
 103 _CITRUS_PROP_READ_UINT_COMMON(chr, int, UCHAR_MAX)
 104 _CITRUS_PROP_READ_UINT_COMMON(num, uint64_t, UINT64_MAX)
 105 #undef _CITRUS_PROP_READ_UINT_COMMON
 106
 107 #define _CITRUS_PROP_READ_INT(_func_, _type_)                   \
 108 static int                                                      \
 109 _citrus_prop_read_##_func_(struct _memstream * __restrict ms,   \
 110     _citrus_prop_object_t * __restrict obj)                     \
 111 {                                                               \
 112         int base, ch, neg;                                      \
 113                                                                 \
 114         _memstream_skip_ws(ms);                                 \
 115         ch = _memstream_getc(ms);                               \
 116         neg = 0;                                                \
 117         switch (ch) {                                           \
 118         case '-':                                               \
 119                 neg = 1;                                        \
 120         case '+':                                               \
 121                 ch = _memstream_getc(ms);                       \
 122         }                                                       \
 123         base = 10;                                              \
 124         if (ch == '0') {                                        \
 125                 base -= 2;                                      \
 126                 ch = _memstream_getc(ms);                       \
 127                 if (ch == 'x' || ch == 'X') {                   \
 128                         ch = _memstream_getc(ms);               \
 129                         if (_bcs_isxdigit(ch) == 0) {           \
 130                                 _memstream_ungetc(ms, ch);      \
 131                                 obj->u._func_ = 0;              \
 132                                 return (0);                     \
 133                         }                                       \
 134                         base += 8;                              \
 135                 }                                               \
 136         } else if (_bcs_isdigit(ch) == 0)                       \
 137                 return (EINVAL);                                \
 138         _memstream_ungetc(ms, ch);                              \
 139         return (_citrus_prop_read_##_func_##_common             \
 140             (ms, &obj->u._func_, base, neg));                   \
 141 }
 142 _CITRUS_PROP_READ_INT(chr, int)
 143 _CITRUS_PROP_READ_INT(num, uint64_t)
 144 #undef _CITRUS_PROP_READ_INT
 145
 146 static int
 147 _citrus_prop_read_character_common(struct _memstream * __restrict ms,
 148     int * __restrict result)
 149 {
 150         int base, ch;
 151
 152         ch = _memstream_getc(ms);
 153         if (ch != '\\')
 154                 *result = ch;
 155         else {
 156                 ch = _memstream_getc(ms);
 157                 base = 16;
 158                 switch (ch) {
 159                 case 'a':
 160                         *result = '\a';
 161                         break;
 162                 case 'b':
 163                         *result = '\b';
 164                         break;
 165                 case 'f':
 166                         *result = '\f';
 167                         break;
 168                 case 'n':
 169                         *result = '\n';
 170                         break;
 171                 case 'r':
 172                         *result = '\r';
 173                         break;
 174                 case 't':
 175                         *result = '\t';
 176                         break;
 177                 case 'v':
 178                         *result = '\v';
 179                         break;
 180                 case '0': case '1': case '2': case '3':
 181                 case '4': case '5': case '6': case '7':
 182                         _memstream_ungetc(ms, ch);
 183                         base -= 8;
 184                         /*FALLTHROUGH*/
 185                 case 'x':
 186                         return (_citrus_prop_read_chr_common(ms, result,
 187                             base, 0));
 188                         /*NOTREACHED*/
 189                 default:
 190                         /* unknown escape */
 191                         *result = ch;
 192                 }
 193         }
 194         return (0);
 195 }
 196
 197 static int
 198 _citrus_prop_read_character(struct _memstream * __restrict ms,
 199     _citrus_prop_object_t * __restrict obj)
 200 {
 201         int ch, errnum;
 202
 203         _memstream_skip_ws(ms);
 204         ch = _memstream_getc(ms);
 205         if (ch != '\'') {
 206                 _memstream_ungetc(ms, ch);
 207                 return (_citrus_prop_read_chr(ms, obj));
 208         }
 209         errnum = _citrus_prop_read_character_common(ms, &ch);
 210         if (errnum != 0)
 211                 return (errnum);
 212         obj->u.chr = ch;
 213         ch = _memstream_getc(ms);
 214         if (ch != '\'')
 215                 return (EINVAL);
 216         return (0);
 217 }
 218
 219 static int
 220 _citrus_prop_read_bool(struct _memstream * __restrict ms,
 221     _citrus_prop_object_t * __restrict obj)
 222 {
 223
 224         _memstream_skip_ws(ms);
 225         switch (_bcs_tolower(_memstream_getc(ms))) {
 226         case 't':
 227                 if (_bcs_tolower(_memstream_getc(ms)) == 'r' &&
 228                     _bcs_tolower(_memstream_getc(ms)) == 'u' &&
 229                     _bcs_tolower(_memstream_getc(ms)) == 'e') {
 230                         obj->u.boolean = true;
 231                         return (0);
 232                 }
 233                 break;
 234         case 'f':
 235                 if (_bcs_tolower(_memstream_getc(ms)) == 'a' &&
 236                     _bcs_tolower(_memstream_getc(ms)) == 'l' &&
 237                     _bcs_tolower(_memstream_getc(ms)) == 's' &&
 238                     _bcs_tolower(_memstream_getc(ms)) == 'e') {
 239                         obj->u.boolean = false;
 240                         return (0);
 241                 }
 242         }
 243         return (EINVAL);
 244 }
 245
 246 static int
 247 _citrus_prop_read_str(struct _memstream * __restrict ms,
 248     _citrus_prop_object_t * __restrict obj)
 249 {
 250         int ch, errnum, quot;
 251         char *s, *t;
 252 #define _CITRUS_PROP_STR_BUFSIZ 512
 253         size_t m, n;
 254
 255         m = _CITRUS_PROP_STR_BUFSIZ;
 256         s = malloc(m);
 257         if (s == NULL)
 258                 return (ENOMEM);
 259         n = 0;
 260         _memstream_skip_ws(ms);
 261         quot = _memstream_getc(ms);
 262         switch (quot) {
 263         case EOF:
 264                 goto done;
 265                 /*NOTREACHED*/
 266         case '\\':
 267                 _memstream_ungetc(ms, quot);
 268                 quot = EOF;
 269                 /*FALLTHROUGH*/
 270         case '\"': case '\'':
 271                 break;
 272         default:
 273                 s[n] = quot;
 274                 ++n, --m;
 275                 quot = EOF;
 276         }
 277         for (;;) {
 278                 if (m < 1) {
 279                         m = _CITRUS_PROP_STR_BUFSIZ;
 280                         t = realloc(s, n + m);
 281                         if (t == NULL) {
 282                                 free(s);
 283                                 return (ENOMEM);
 284                         }
 285                         s = t;
 286                 }
 287                 ch = _memstream_getc(ms);
 288                 if (quot == ch || (quot == EOF &&
 289                     (ch == ';' || _bcs_isspace(ch)))) {
 290 done:
 291                         s[n] = '\0';
 292                         obj->u.str = (const char *)s;
 293                         return (0);
 294                 }
 295                 _memstream_ungetc(ms, ch);
 296                 errnum = _citrus_prop_read_character_common(ms, &ch);
 297                 if (errnum != 0) {
 298                         free(s);
 299                         return (errnum);
 300                 }
 301                 s[n] = ch;
 302                 ++n, --m;
 303         }
 304         free(s);
 305         return (EINVAL);
 306 #undef _CITRUS_PROP_STR_BUFSIZ
 307 }
 308
 309 typedef int (*_citrus_prop_read_type_t)(struct _memstream * __restrict,
 310     _citrus_prop_object_t * __restrict);
 311
 312 static const _citrus_prop_read_type_t readers[] = {
 313         _citrus_prop_read_bool,
 314         _citrus_prop_read_str,
 315         _citrus_prop_read_character,
 316         _citrus_prop_read_num,
 317 };
 318
 319 static __inline int
 320 _citrus_prop_read_symbol(struct _memstream * __restrict ms,
 321     char * __restrict s, size_t n)
 322 {
 323         int ch;
 324         size_t m;
 325
 326         for (m = 0; m < n; ++m) {
 327                 ch = _memstream_getc(ms);
 328                 if (ch != '_' && _bcs_isalnum(ch) == 0)
 329                         goto name_found;
 330                 s[m] = ch;
 331         }
 332         ch = _memstream_getc(ms);
 333         if (ch == '_' || _bcs_isalnum(ch) != 0)
 334                 return (EINVAL);
 335
 336 name_found:
 337         _memstream_ungetc(ms, ch);
 338         s[m] = '\0';
 339
 340         return (0);
 341 }
 342
 343 static int
 344 _citrus_prop_parse_element(struct _memstream * __restrict ms,
 345     const _citrus_prop_hint_t * __restrict hints, void * __restrict context)
 346 {
 347         int ch, errnum;
 348 #define _CITRUS_PROP_HINT_NAME_LEN_MAX  255
 349         char name[_CITRUS_PROP_HINT_NAME_LEN_MAX + 1];
 350         const _citrus_prop_hint_t *hint;
 351         _citrus_prop_object_t ostart, oend;
 352
 353         errnum = _citrus_prop_read_symbol(ms, name, sizeof(name));
 354         if (errnum != 0)
 355                 return (errnum);
 356         for (hint = hints; hint->name != NULL; ++hint)
 357                 if (_citrus_bcs_strcasecmp(name, hint->name) == 0)
 358                         goto hint_found;
 359         return (EINVAL);
 360
 361 hint_found:
 362         _memstream_skip_ws(ms);
 363         ch = _memstream_getc(ms);
 364         if (ch != '=' && ch != ':')
 365                 _memstream_ungetc(ms, ch);
 366         do {
 367                 _citrus_prop_object_init(&ostart, hint->type);
 368                 _citrus_prop_object_init(&oend, hint->type);
 369                 errnum = (*readers[hint->type])(ms, &ostart);
 370                 if (errnum != 0)
 371                         return (errnum);
 372                 _memstream_skip_ws(ms);
 373                 ch = _memstream_getc(ms);
 374                 switch (hint->type) {
 375                 case _CITRUS_PROP_BOOL:
 376                         /*FALLTHROUGH*/
 377                 case _CITRUS_PROP_STR:
 378                         break;
 379                 default:
 380                         if (ch != '-')
 381                                 break;
 382                         errnum = (*readers[hint->type])(ms, &oend);
 383                         if (errnum != 0)
 384                                 return (errnum);
 385                         _memstream_skip_ws(ms);
 386                         ch = _memstream_getc(ms);
 387                 }
 388 #define CALL0(_func_)                                   \
 389 do {                                                    \
 390         errnum = (*hint->cb._func_.func)(context,       \
 391             hint->name, ostart.u._func_);               \
 392 } while (0)
 393 #define CALL1(_func_)                                   \
 394 do {                                                    \
 395         errnum = (*hint->cb._func_.func)(context,       \
 396             hint->name, ostart.u._func_, oend.u._func_);\
 397 } while (0)
 398                 switch (hint->type) {
 399                 case _CITRUS_PROP_BOOL:
 400                         CALL0(boolean);
 401                         break;
 402                 case _CITRUS_PROP_STR:
 403                         CALL0(str);
 404                         break;
 405                 case _CITRUS_PROP_CHR:
 406                         CALL1(chr);
 407                         break;
 408                 case _CITRUS_PROP_NUM:
 409                         CALL1(num);
 410                         break;
 411                 default:
 412                         abort();
 413                         /*NOTREACHED*/
 414                 }
 415 #undef CALL0
 416 #undef CALL1
 417                 _citrus_prop_object_uninit(&ostart);
 418                 _citrus_prop_object_uninit(&oend);
 419                 if (errnum != 0)
 420                         return (errnum);
 421         } while (ch == ',');
 422         if (ch != ';')
 423                 _memstream_ungetc(ms, ch);
 424         return (0);
 425 }
 426
 427 int
 428 _citrus_prop_parse_variable(const _citrus_prop_hint_t * __restrict hints,
 429     void * __restrict context, const void *var, size_t lenvar)
 430 {
 431         struct _memstream ms;
 432         int ch, errnum;
 433
 434         _memstream_bind_ptr(&ms, __DECONST(void *, var), lenvar);
 435         for (;;) {
 436                 _memstream_skip_ws(&ms);
 437                 ch = _memstream_getc(&ms);
 438                 if (ch == EOF || ch == '\0')
 439                         break;
 440                 _memstream_ungetc(&ms, ch);
 441                 errnum = _citrus_prop_parse_element(&ms, hints, context);
 442                 if (errnum != 0)
 443                         return (errnum);
 444         }
 445         return (0);
 446 }