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/**********************************************************************
regext.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2008 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "regint.h"
static void
conv_ext0be32(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = '\0';
*conv++ = '\0';
*conv++ = '\0';
*conv++ = *s++;
}
}
static void
conv_ext0le32(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = *s++;
*conv++ = '\0';
*conv++ = '\0';
*conv++ = '\0';
}
}
static void
conv_ext0be(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = '\0';
*conv++ = *s++;
}
}
static void
conv_ext0le(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = *s++;
*conv++ = '\0';
}
}
static void
conv_swap4bytes(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = s[3];
*conv++ = s[2];
*conv++ = s[1];
*conv++ = s[0];
s += 4;
}
}
static void
conv_swap2bytes(const UChar* s, const UChar* end, UChar* conv)
{
while (s < end) {
*conv++ = s[1];
*conv++ = s[0];
s += 2;
}
}
static int
conv_encoding(OnigEncoding from, OnigEncoding to, const UChar* s, const UChar* end,
UChar** conv, UChar** conv_end)
{
int len = end - s;
if (to == ONIG_ENCODING_UTF16_BE) {
if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
*conv = (UChar* )xmalloc(len * 2);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + (len * 2);
conv_ext0be(s, end, *conv);
return 0;
}
else if (from == ONIG_ENCODING_UTF16_LE) {
swap16:
*conv = (UChar* )xmalloc(len);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + len;
conv_swap2bytes(s, end, *conv);
return 0;
}
}
else if (to == ONIG_ENCODING_UTF16_LE) {
if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
*conv = (UChar* )xmalloc(len * 2);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + (len * 2);
conv_ext0le(s, end, *conv);
return 0;
}
else if (from == ONIG_ENCODING_UTF16_BE) {
goto swap16;
}
}
if (to == ONIG_ENCODING_UTF32_BE) {
if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
*conv = (UChar* )xmalloc(len * 4);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + (len * 4);
conv_ext0be32(s, end, *conv);
return 0;
}
else if (from == ONIG_ENCODING_UTF32_LE) {
swap32:
*conv = (UChar* )xmalloc(len);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + len;
conv_swap4bytes(s, end, *conv);
return 0;
}
}
else if (to == ONIG_ENCODING_UTF32_LE) {
if (from == ONIG_ENCODING_ASCII || from == ONIG_ENCODING_ISO_8859_1) {
*conv = (UChar* )xmalloc(len * 4);
CHECK_NULL_RETURN_MEMERR(*conv);
*conv_end = *conv + (len * 4);
conv_ext0le32(s, end, *conv);
return 0;
}
else if (from == ONIG_ENCODING_UTF32_BE) {
goto swap32;
}
}
return ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION;
}
extern int
onig_new_deluxe(regex_t** reg, const UChar* pattern, const UChar* pattern_end,
OnigCompileInfo* ci, OnigErrorInfo* einfo)
{
int r;
UChar *cpat, *cpat_end;
if (IS_NOT_NULL(einfo)) einfo->par = (UChar* )NULL;
if (ci->pattern_enc != ci->target_enc) {
r = conv_encoding(ci->pattern_enc, ci->target_enc, pattern, pattern_end,
&cpat, &cpat_end);
if (r) return r;
}
else {
cpat = (UChar* )pattern;
cpat_end = (UChar* )pattern_end;
}
*reg = (regex_t* )xmalloc(sizeof(regex_t));
if (IS_NULL(*reg)) {
r = ONIGERR_MEMORY;
goto err2;
}
r = onig_reg_init(*reg, ci->option, ci->case_fold_flag, ci->target_enc,
ci->syntax);
if (r) goto err;
r = onig_compile(*reg, cpat, cpat_end, einfo);
if (r) {
err:
onig_free(*reg);
*reg = NULL;
}
err2:
if (cpat != pattern) xfree(cpat);
return r;
}
#ifdef USE_RECOMPILE_API
extern int
onig_recompile_deluxe(regex_t* reg, const UChar* pattern, const UChar* pattern_end,
OnigCompileInfo* ci, OnigErrorInfo* einfo)
{
int r;
regex_t *new_reg;
r = onig_new_deluxe(&new_reg, pattern, pattern_end, ci, einfo);
if (r) return r;
if (ONIG_STATE(reg) == ONIG_STATE_NORMAL) {
onig_transfer(reg, new_reg);
}
else {
onig_chain_link_add(reg, new_reg);
}
return 0;
}
#endif
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