lib/libc/iconv/citrus_prop.c

   1 /* $FreeBSD$ */
   2 /* $NetBSD: citrus_prop.c,v 1.4 2011/03/30 08:22:01 jruoho Exp $ */
   3
   4 /*-
   5  * SPDX-License-Identifier: BSD-2-Clause
   6  *
   7  * Copyright (c)2006 Citrus Project,
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32
  33 #include <sys/cdefs.h>
  34
  35 #include <assert.h>
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <stdbool.h>
  39 #include <stddef.h>
  40 #include <stdio.h>
  41 #include <stdint.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include "citrus_namespace.h"
  46 #include "citrus_bcs.h"
  47 #include "citrus_region.h"
  48 #include "citrus_memstream.h"
  49 #include "citrus_prop.h"
  50
  51 typedef struct {
  52         _citrus_prop_type_t type;
  53         union {
  54                 const char *str;
  55                 int chr;
  56                 bool boolean;
  57                 uint64_t num;
  58         } u;
  59 } _citrus_prop_object_t;
  60
  61 static __inline void
  62 _citrus_prop_object_init(_citrus_prop_object_t *obj, _citrus_prop_type_t type)
  63 {
  64
  65         obj->type = type;
  66         memset(&obj->u, 0, sizeof(obj->u));
  67 }
  68
  69 static __inline void
  70 _citrus_prop_object_uninit(_citrus_prop_object_t *obj)
  71 {
  72
  73         if (obj->type == _CITRUS_PROP_STR)
  74                 free(__DECONST(void *, obj->u.str));
  75 }
  76
  77 static const char *xdigit = "0123456789ABCDEF";
  78
  79 #define _CITRUS_PROP_READ_UINT_COMMON(_func_, _type_, _max_)            \
  80 static int                                                              \
  81 _citrus_prop_read_##_func_##_common(struct _memstream * __restrict ms,  \
  82     _type_ * __restrict result, int base)                               \
  83 {                                                                       \
  84         _type_ acc, cutoff;                                             \
  85         int ch, cutlim, n;                                              \
  86         char *p;                                                        \
  87                                                                         \
  88         acc = (_type_)0;                                                \
  89         cutoff = _max_ / base;                                          \
  90         cutlim = _max_ % base;                                          \
  91         for (;;) {                                                      \
  92                 ch = _memstream_getc(ms);                               \
  93                 p = strchr(xdigit, _bcs_toupper(ch));                   \
  94                 if (p == NULL || (n = (p - xdigit)) >= base)            \
  95                         break;                                          \
  96                 if (acc > cutoff || (acc == cutoff && n > cutlim))      \
  97                         break;                                          \
  98                 acc *= base;                                            \
  99                 acc += n;                                               \
 100         }                                                               \
 101         _memstream_ungetc(ms, ch);                                      \
 102         *result = acc;                                                  \
 103         return (0);                                                     \
 104 }
 105 _CITRUS_PROP_READ_UINT_COMMON(chr, int, UCHAR_MAX)
 106 _CITRUS_PROP_READ_UINT_COMMON(num, uint64_t, UINT64_MAX)
 107 #undef _CITRUS_PROP_READ_UINT_COMMON
 108
 109 #define _CITRUS_PROP_READ_INT(_func_, _type_)                   \
 110 static int                                                      \
 111 _citrus_prop_read_##_func_(struct _memstream * __restrict ms,   \
 112     _citrus_prop_object_t * __restrict obj)                     \
 113 {                                                               \
 114         int base, ch, neg;                                      \
 115                                                                 \
 116         _memstream_skip_ws(ms);                                 \
 117         ch = _memstream_getc(ms);                               \
 118         neg = 0;                                                \
 119         switch (ch) {                                           \
 120         case '-':                                               \
 121                 neg = 1;                                        \
 122         case '+':                                               \
 123                 ch = _memstream_getc(ms);                       \
 124         }                                                       \
 125         base = 10;                                              \
 126         if (ch == '0') {                                        \
 127                 base -= 2;                                      \
 128                 ch = _memstream_getc(ms);                       \
 129                 if (ch == 'x' || ch == 'X') {                   \
 130                         ch = _memstream_getc(ms);               \
 131                         if (_bcs_isxdigit(ch) == 0) {           \
 132                                 _memstream_ungetc(ms, ch);      \
 133                                 obj->u._func_ = 0;              \
 134                                 return (0);                     \
 135                         }                                       \
 136                         base += 8;                              \
 137                 }                                               \
 138         } else if (_bcs_isdigit(ch) == 0)                       \
 139                 return (EINVAL);                                \
 140         _memstream_ungetc(ms, ch);                              \
 141         return (_citrus_prop_read_##_func_##_common             \
 142             (ms, &obj->u._func_, base));                        \
 143 }
 144 _CITRUS_PROP_READ_INT(chr, int)
 145 _CITRUS_PROP_READ_INT(num, uint64_t)
 146 #undef _CITRUS_PROP_READ_INT
 147
 148 static int
 149 _citrus_prop_read_character_common(struct _memstream * __restrict ms,
 150     int * __restrict result)
 151 {
 152         int base, ch;
 153
 154         ch = _memstream_getc(ms);
 155         if (ch != '\\')
 156                 *result = ch;
 157         else {
 158                 ch = _memstream_getc(ms);
 159                 base = 16;
 160                 switch (ch) {
 161                 case 'a':
 162                         *result = '\a';
 163                         break;
 164                 case 'b':
 165                         *result = '\b';
 166                         break;
 167                 case 'f':
 168                         *result = '\f';
 169                         break;
 170                 case 'n':
 171                         *result = '\n';
 172                         break;
 173                 case 'r':
 174                         *result = '\r';
 175                         break;
 176                 case 't':
 177                         *result = '\t';
 178                         break;
 179                 case 'v':
 180                         *result = '\v';
 181                         break;
 182                 case '0': case '1': case '2': case '3':
 183                 case '4': case '5': case '6': case '7':
 184                         _memstream_ungetc(ms, ch);
 185                         base -= 8;
 186                         /*FALLTHROUGH*/
 187                 case 'x':
 188                         return (_citrus_prop_read_chr_common(ms, result, base));
 189                         /*NOTREACHED*/
 190                 default:
 191                         /* unknown escape */
 192                         *result = ch;
 193                 }
 194         }
 195         return (0);
 196 }
 197
 198 static int
 199 _citrus_prop_read_character(struct _memstream * __restrict ms,
 200     _citrus_prop_object_t * __restrict obj)
 201 {
 202         int ch, errnum;
 203
 204         _memstream_skip_ws(ms);
 205         ch = _memstream_getc(ms);
 206         if (ch != '\'') {
 207                 _memstream_ungetc(ms, ch);
 208                 return (_citrus_prop_read_chr(ms, obj));
 209         }
 210         errnum = _citrus_prop_read_character_common(ms, &ch);
 211         if (errnum != 0)
 212                 return (errnum);
 213         obj->u.chr = ch;
 214         ch = _memstream_getc(ms);
 215         if (ch != '\'')
 216                 return (EINVAL);
 217         return (0);
 218 }
 219
 220 static int
 221 _citrus_prop_read_bool(struct _memstream * __restrict ms,
 222     _citrus_prop_object_t * __restrict obj)
 223 {
 224
 225         _memstream_skip_ws(ms);
 226         switch (_bcs_tolower(_memstream_getc(ms))) {
 227         case 't':
 228                 if (_bcs_tolower(_memstream_getc(ms)) == 'r' &&
 229                     _bcs_tolower(_memstream_getc(ms)) == 'u' &&
 230                     _bcs_tolower(_memstream_getc(ms)) == 'e') {
 231                         obj->u.boolean = true;
 232                         return (0);
 233                 }
 234                 break;
 235         case 'f':
 236                 if (_bcs_tolower(_memstream_getc(ms)) == 'a' &&
 237                     _bcs_tolower(_memstream_getc(ms)) == 'l' &&
 238                     _bcs_tolower(_memstream_getc(ms)) == 's' &&
 239                     _bcs_tolower(_memstream_getc(ms)) == 'e') {
 240                         obj->u.boolean = false;
 241                         return (0);
 242                 }
 243         }
 244         return (EINVAL);
 245 }
 246
 247 static int
 248 _citrus_prop_read_str(struct _memstream * __restrict ms,
 249     _citrus_prop_object_t * __restrict obj)
 250 {
 251         int ch, errnum, quot;
 252         char *s, *t;
 253 #define _CITRUS_PROP_STR_BUFSIZ 512
 254         size_t m, n;
 255
 256         m = _CITRUS_PROP_STR_BUFSIZ;
 257         s = malloc(m);
 258         if (s == NULL)
 259                 return (ENOMEM);
 260         n = 0;
 261         _memstream_skip_ws(ms);
 262         quot = _memstream_getc(ms);
 263         switch (quot) {
 264         case EOF:
 265                 goto done;
 266                 /*NOTREACHED*/
 267         case '\\':
 268                 _memstream_ungetc(ms, quot);
 269                 quot = EOF;
 270                 /*FALLTHROUGH*/
 271         case '\"': case '\'':
 272                 break;
 273         default:
 274                 s[n] = quot;
 275                 ++n, --m;
 276                 quot = EOF;
 277         }
 278         for (;;) {
 279                 if (m < 1) {
 280                         m = _CITRUS_PROP_STR_BUFSIZ;
 281                         t = realloc(s, n + m);
 282                         if (t == NULL) {
 283                                 free(s);
 284                                 return (ENOMEM);
 285                         }
 286                         s = t;
 287                 }
 288                 ch = _memstream_getc(ms);
 289                 if (quot == ch || (quot == EOF &&
 290                     (ch == ';' || _bcs_isspace(ch)))) {
 291 done:
 292                         s[n] = '\0';
 293                         obj->u.str = (const char *)s;
 294                         return (0);
 295                 }
 296                 _memstream_ungetc(ms, ch);
 297                 errnum = _citrus_prop_read_character_common(ms, &ch);
 298                 if (errnum != 0) {
 299                         free(s);
 300                         return (errnum);
 301                 }
 302                 s[n] = ch;
 303                 ++n, --m;
 304         }
 305         free(s);
 306         return (EINVAL);
 307 #undef _CITRUS_PROP_STR_BUFSIZ
 308 }
 309
 310 typedef int (*_citrus_prop_read_type_t)(struct _memstream * __restrict,
 311     _citrus_prop_object_t * __restrict);
 312
 313 static const _citrus_prop_read_type_t readers[] = {
 314         _citrus_prop_read_bool,
 315         _citrus_prop_read_str,
 316         _citrus_prop_read_character,
 317         _citrus_prop_read_num,
 318 };
 319
 320 static __inline int
 321 _citrus_prop_read_symbol(struct _memstream * __restrict ms,
 322     char * __restrict s, size_t n)
 323 {
 324         int ch;
 325         size_t m;
 326
 327         for (m = 0; m < n; ++m) {
 328                 ch = _memstream_getc(ms);
 329                 if (ch != '_' && _bcs_isalnum(ch) == 0)
 330                         goto name_found;
 331                 s[m] = ch;
 332         }
 333         ch = _memstream_getc(ms);
 334         if (ch == '_' || _bcs_isalnum(ch) != 0)
 335                 return (EINVAL);
 336
 337 name_found:
 338         _memstream_ungetc(ms, ch);
 339         s[m] = '\0';
 340
 341         return (0);
 342 }
 343
 344 static int
 345 _citrus_prop_parse_element(struct _memstream * __restrict ms,
 346     const _citrus_prop_hint_t * __restrict hints, void * __restrict context)
 347 {
 348         int ch, errnum;
 349 #define _CITRUS_PROP_HINT_NAME_LEN_MAX  255
 350         char name[_CITRUS_PROP_HINT_NAME_LEN_MAX + 1];
 351         const _citrus_prop_hint_t *hint;
 352         _citrus_prop_object_t ostart, oend;
 353
 354         errnum = _citrus_prop_read_symbol(ms, name, sizeof(name));
 355         if (errnum != 0)
 356                 return (errnum);
 357         for (hint = hints; hint->name != NULL; ++hint)
 358                 if (_citrus_bcs_strcasecmp(name, hint->name) == 0)
 359                         goto hint_found;
 360         return (EINVAL);
 361
 362 hint_found:
 363         _memstream_skip_ws(ms);
 364         ch = _memstream_getc(ms);
 365         if (ch != '=' && ch != ':')
 366                 _memstream_ungetc(ms, ch);
 367         do {
 368                 _citrus_prop_object_init(&ostart, hint->type);
 369                 _citrus_prop_object_init(&oend, hint->type);
 370                 errnum = (*readers[hint->type])(ms, &ostart);
 371                 if (errnum != 0)
 372                         return (errnum);
 373                 _memstream_skip_ws(ms);
 374                 ch = _memstream_getc(ms);
 375                 switch (hint->type) {
 376                 case _CITRUS_PROP_BOOL:
 377                         /*FALLTHROUGH*/
 378                 case _CITRUS_PROP_STR:
 379                         break;
 380                 default:
 381                         if (ch != '-')
 382                                 break;
 383                         errnum = (*readers[hint->type])(ms, &oend);
 384                         if (errnum != 0)
 385                                 return (errnum);
 386                         _memstream_skip_ws(ms);
 387                         ch = _memstream_getc(ms);
 388                 }
 389 #define CALL0(_func_)                                   \
 390 do {                                                    \
 391         errnum = (*hint->cb._func_.func)(context,       \
 392             hint->name, ostart.u._func_);               \
 393 } while (0)
 394 #define CALL1(_func_)                                   \
 395 do {                                                    \
 396         errnum = (*hint->cb._func_.func)(context,       \
 397             hint->name, ostart.u._func_, oend.u._func_);\
 398 } while (0)
 399                 switch (hint->type) {
 400                 case _CITRUS_PROP_BOOL:
 401                         CALL0(boolean);
 402                         break;
 403                 case _CITRUS_PROP_STR:
 404                         CALL0(str);
 405                         break;
 406                 case _CITRUS_PROP_CHR:
 407                         CALL1(chr);
 408                         break;
 409                 case _CITRUS_PROP_NUM:
 410                         CALL1(num);
 411                         break;
 412                 default:
 413                         abort();
 414                         /*NOTREACHED*/
 415                 }
 416 #undef CALL0
 417 #undef CALL1
 418                 _citrus_prop_object_uninit(&ostart);
 419                 _citrus_prop_object_uninit(&oend);
 420                 if (errnum != 0)
 421                         return (errnum);
 422         } while (ch == ',');
 423         if (ch != ';')
 424                 _memstream_ungetc(ms, ch);
 425         return (0);
 426 }
 427
 428 int
 429 _citrus_prop_parse_variable(const _citrus_prop_hint_t * __restrict hints,
 430     void * __restrict context, const void *var, size_t lenvar)
 431 {
 432         struct _memstream ms;
 433         int ch, errnum;
 434
 435         _memstream_bind_ptr(&ms, __DECONST(void *, var), lenvar);
 436         for (;;) {
 437                 _memstream_skip_ws(&ms);
 438                 ch = _memstream_getc(&ms);
 439                 if (ch == EOF || ch == '\0')
 440                         break;
 441                 _memstream_ungetc(&ms, ch);
 442                 errnum = _citrus_prop_parse_element(&ms, hints, context);
 443                 if (errnum != 0)
 444                         return (errnum);
 445         }
 446         return (0);
 447 }