Annotation of embedaddon/php/ext/mbstring/oniguruma/regext.c, revision 1.1.1.1

1.1       misho       1: /**********************************************************************
                      2:   regext.c -  Oniguruma (regular expression library)
                      3: **********************************************************************/
                      4: /*-
                      5:  * Copyright (c) 2002-2006  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29: 
                     30: #include "regint.h"
                     31: 
                     32: static void
                     33: conv_ext0be32(const UChar* s, const UChar* end, UChar* conv)
                     34: {
                     35:   while (s < end) {
                     36:     *conv++ = '\0';
                     37:     *conv++ = '\0';
                     38:     *conv++ = '\0';
                     39:     *conv++ = *s++;
                     40:   }
                     41: }
                     42: 
                     43: static void
                     44: conv_ext0le32(const UChar* s, const UChar* end, UChar* conv)
                     45: {
                     46:   while (s < end) {
                     47:     *conv++ = *s++;
                     48:     *conv++ = '\0';
                     49:     *conv++ = '\0';
                     50:     *conv++ = '\0';
                     51:   }
                     52: }
                     53: 
                     54: static void
                     55: conv_ext0be(const UChar* s, const UChar* end, UChar* conv)
                     56: {
                     57:   while (s < end) {
                     58:     *conv++ = '\0';
                     59:     *conv++ = *s++;
                     60:   }
                     61: }
                     62: 
                     63: static void
                     64: conv_ext0le(const UChar* s, const UChar* end, UChar* conv)
                     65: {
                     66:   while (s < end) {
                     67:     *conv++ = *s++;
                     68:     *conv++ = '\0';
                     69:   }
                     70: }
                     71: 
                     72: static void
                     73: conv_swap4bytes(const UChar* s, const UChar* end, UChar* conv)
                     74: {
                     75:   while (s < end) {
                     76:     *conv++ = s[3];
                     77:     *conv++ = s[2];
                     78:     *conv++ = s[1];
                     79:     *conv++ = s[0];
                     80:     s += 4;
                     81:   }
                     82: }
                     83: 
                     84: static void
                     85: conv_swap2bytes(const UChar* s, const UChar* end, UChar* conv)
                     86: {
                     87:   while (s < end) {
                     88:     *conv++ = s[1];
                     89:     *conv++ = s[0];
                     90:     s += 2;
                     91:   }
                     92: }
                     93: 
                     94: static int
                     95: conv_encoding(OnigEncoding from, OnigEncoding to, const UChar* s, const UChar* end,
                     96:               UChar** conv, UChar** conv_end)
                     97: {
                     98:   int len = end - s;
                     99: 
                    100:   if (to == ONIG_ENCODING_UTF16_BE) {
                    101:     if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
                    102:       *conv = (UChar* )xmalloc(len * 2);
                    103:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    104:       *conv_end = *conv + (len * 2);
                    105:       conv_ext0be(s, end, *conv);
                    106:       return 0;
                    107:     }
                    108:     else if (from == ONIG_ENCODING_UTF16_LE) {
                    109:     swap16:
                    110:       *conv = (UChar* )xmalloc(len);
                    111:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    112:       *conv_end = *conv + len;
                    113:       conv_swap2bytes(s, end, *conv);
                    114:       return 0;
                    115:     }
                    116:   }
                    117:   else if (to == ONIG_ENCODING_UTF16_LE) {
                    118:     if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
                    119:       *conv = (UChar* )xmalloc(len * 2);
                    120:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    121:       *conv_end = *conv + (len * 2);
                    122:       conv_ext0le(s, end, *conv);
                    123:       return 0;
                    124:     }
                    125:     else if (from == ONIG_ENCODING_UTF16_BE) {
                    126:       goto swap16;
                    127:     }
                    128:   }
                    129:   if (to == ONIG_ENCODING_UTF32_BE) {
                    130:     if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
                    131:       *conv = (UChar* )xmalloc(len * 4);
                    132:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    133:       *conv_end = *conv + (len * 4);
                    134:       conv_ext0be32(s, end, *conv);
                    135:       return 0;
                    136:     }
                    137:     else if (from == ONIG_ENCODING_UTF32_LE) {
                    138:     swap32:
                    139:       *conv = (UChar* )xmalloc(len);
                    140:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    141:       *conv_end = *conv + len;
                    142:       conv_swap4bytes(s, end, *conv);
                    143:       return 0;
                    144:     }
                    145:   }
                    146:   else if (to == ONIG_ENCODING_UTF32_LE) {
                    147:     if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
                    148:       *conv = (UChar* )xmalloc(len * 4);
                    149:       CHECK_NULL_RETURN_VAL(*conv, ONIGERR_MEMORY);
                    150:       *conv_end = *conv + (len * 4);
                    151:       conv_ext0le32(s, end, *conv);
                    152:       return 0;
                    153:     }
                    154:     else if (from == ONIG_ENCODING_UTF32_BE) {
                    155:       goto swap32;
                    156:     }
                    157:   }
                    158: 
                    159:   return ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION;
                    160: }
                    161: 
                    162: extern int
                    163: onig_new_deluxe(regex_t** reg, const UChar* pattern, const UChar* pattern_end,
                    164:                 OnigCompileInfo* ci, OnigErrorInfo* einfo)
                    165: {
                    166:   int r;
                    167:   UChar *cpat, *cpat_end;
                    168: 
                    169:   if (IS_NOT_NULL(einfo)) einfo->par = (UChar* )NULL;
                    170: 
                    171:   if (ci->pattern_enc != ci->target_enc) {
                    172:     r = conv_encoding(ci->pattern_enc, ci->target_enc, pattern, pattern_end,
                    173:                       &cpat, &cpat_end);
                    174:     if (r) return r;
                    175:   }
                    176:   else {
                    177:     cpat     = (UChar* )pattern;
                    178:     cpat_end = (UChar* )pattern_end;
                    179:   }
                    180: 
                    181:   r = onig_alloc_init(reg, ci->option, ci->ambig_flag, ci->target_enc,
                    182:                       ci->syntax);
                    183:   if (r) goto err;
                    184: 
                    185:   r = onig_compile(*reg, cpat, cpat_end, einfo);
                    186:   if (r) {
                    187:     onig_free(*reg);
                    188:     *reg = NULL;
                    189:   }
                    190: 
                    191:  err:
                    192:   if (cpat != pattern) xfree(cpat);
                    193: 
                    194:   return r;
                    195: }
                    196: 
                    197: #ifdef USE_RECOMPILE_API
                    198: extern int
                    199: onig_recompile_deluxe(regex_t* reg, const UChar* pattern, const UChar* pattern_end,
                    200:                       OnigCompileInfo* ci, OnigErrorInfo* einfo)
                    201: {
                    202:   int r;
                    203:   regex_t *new_reg;
                    204: 
                    205:   r = onig_new_deluxe(&new_reg, pattern, pattern_end, ci, einfo);
                    206:   if (r) return r;
                    207:   if (ONIG_STATE(reg) == ONIG_STATE_NORMAL) {
                    208:     onig_transfer(reg, new_reg);
                    209:   }
                    210:   else {
                    211:     onig_chain_link_add(reg, new_reg);
                    212:   }
                    213:   return 0;
                    214: }
                    215: #endif

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