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mc/lib/search/regex.c

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/*
Search text engine.
Regex search
Copyright (C) 2009-2014
The Free Software Foundation, Inc.
Written by:
Slava Zanko <slavazanko@gmail.com>, 2009, 2010, 2011, 2013
Vitaliy Filippov <vitalif@yourcmc.ru>, 2011
Andrew Borodin <aborodin@vmail.ru>, 2013
This file is part of the Midnight Commander.
The Midnight Commander is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
The Midnight Commander is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdlib.h>
#include "lib/global.h"
#include "lib/strutil.h"
#include "lib/search.h"
#include "lib/strescape.h"
#include "internal.h"
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
#define REPLACE_PREPARE_T_NOTHING_SPECIAL -1
#define REPLACE_PREPARE_T_REPLACE_FLAG -2
#define REPLACE_PREPARE_T_ESCAPE_SEQ -3
/*** file scope type declarations ****************************************************************/
typedef enum
{
REPLACE_T_NO_TRANSFORM = 0,
REPLACE_T_UPP_TRANSFORM_CHAR = 1,
REPLACE_T_LOW_TRANSFORM_CHAR = 2,
REPLACE_T_UPP_TRANSFORM = 4,
REPLACE_T_LOW_TRANSFORM = 8
} replace_transform_type_t;
/*** file scope variables ************************************************************************/
/*** file scope functions ************************************************************************/
static gboolean
mc_search__regex_str_append_if_special (GString * copy_to, const GString * regex_str,
gsize * offset)
{
char *tmp_regex_str;
gsize spec_chr_len;
const char **spec_chr;
const char *special_chars[] = {
"\\s", "\\S",
"\\d", "\\D",
"\\b", "\\B",
"\\w", "\\W",
"\\t", "\\n",
"\\r", "\\f",
"\\a", "\\e",
"\\x", "\\X",
"\\c", "\\C",
"\\l", "\\L",
"\\u", "\\U",
"\\E", "\\Q",
NULL
};
spec_chr = special_chars;
tmp_regex_str = &(regex_str->str[*offset]);
while (*spec_chr)
{
spec_chr_len = strlen (*spec_chr);
if (!strncmp (tmp_regex_str, *spec_chr, spec_chr_len))
{
if (!strutils_is_char_escaped (regex_str->str, tmp_regex_str))
{
if (!strncmp ("\\x", *spec_chr, spec_chr_len))
{
if (*(tmp_regex_str + spec_chr_len) == '{')
{
while ((spec_chr_len < regex_str->len - *offset)
&& *(tmp_regex_str + spec_chr_len) != '}')
spec_chr_len++;
if (*(tmp_regex_str + spec_chr_len) == '}')
spec_chr_len++;
}
else
spec_chr_len += 2;
}
g_string_append_len (copy_to, tmp_regex_str, spec_chr_len);
*offset += spec_chr_len;
return TRUE;
}
}
spec_chr++;
}
return FALSE;
}
/* --------------------------------------------------------------------------------------------- */
static void
mc_search__cond_struct_new_regex_hex_add (const char *charset, GString * str_to,
const char *one_char, gsize str_len)
{
GString *upp, *low;
gsize loop;
upp = mc_search__toupper_case_str (charset, one_char, str_len);
low = mc_search__tolower_case_str (charset, one_char, str_len);
for (loop = 0; loop < upp->len; loop++)
{
gchar tmp_str[10 + 1]; /* longest content is "[\\x%02X\\x%02X]" */
gint tmp_len;
if (loop >= low->len || upp->str[loop] == low->str[loop])
tmp_len =
g_snprintf (tmp_str, sizeof (tmp_str), "\\x%02X", (unsigned char) upp->str[loop]);
else
tmp_len =
g_snprintf (tmp_str, sizeof (tmp_str), "[\\x%02X\\x%02X]",
(unsigned char) upp->str[loop], (unsigned char) low->str[loop]);
g_string_append_len (str_to, tmp_str, tmp_len);
}
g_string_free (upp, TRUE);
g_string_free (low, TRUE);
}
/* --------------------------------------------------------------------------------------------- */
static void
mc_search__cond_struct_new_regex_accum_append (const char *charset, GString * str_to,
GString * str_from)
{
GString *recoded_part;
gsize loop = 0;
recoded_part = g_string_sized_new (32);
while (loop < str_from->len)
{
gchar *one_char;
gsize one_char_len;
gboolean just_letters;
one_char =
mc_search__get_one_symbol (charset, &(str_from->str[loop]),
min (str_from->len - loop, 6), &just_letters);
one_char_len = strlen (one_char);
if (one_char_len == 0)
loop++;
else
{
loop += one_char_len;
if (just_letters)
mc_search__cond_struct_new_regex_hex_add (charset, recoded_part, one_char,
one_char_len);
else
g_string_append_len (recoded_part, one_char, one_char_len);
}
g_free (one_char);
}
g_string_append_len (str_to, recoded_part->str, recoded_part->len);
g_string_free (recoded_part, TRUE);
g_string_set_size (str_from, 0);
}
/* --------------------------------------------------------------------------------------------- */
static GString *
mc_search__cond_struct_new_regex_ci_str (const char *charset, const GString * astr)
{
GString *accumulator, *spec_char, *ret_str;
gsize loop;
ret_str = g_string_sized_new (64);
accumulator = g_string_sized_new (64);
spec_char = g_string_sized_new (64);
loop = 0;
while (loop <= astr->len)
{
if (mc_search__regex_str_append_if_special (spec_char, astr, &loop))
{
mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
g_string_append_len (ret_str, spec_char->str, spec_char->len);
g_string_set_size (spec_char, 0);
continue;
}
if (astr->str[loop] == '[' && !strutils_is_char_escaped (astr->str, &(astr->str[loop])))
{
mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
while (loop < astr->len && !(astr->str[loop] == ']'
&& !strutils_is_char_escaped (astr->str,
&(astr->str[loop]))))
{
g_string_append_c (ret_str, astr->str[loop]);
loop++;
}
g_string_append_c (ret_str, astr->str[loop]);
loop++;
continue;
}
/*
TODO: handle [ and ]
*/
g_string_append_c (accumulator, astr->str[loop]);
loop++;
}
mc_search__cond_struct_new_regex_accum_append (charset, ret_str, accumulator);
g_string_free (accumulator, TRUE);
g_string_free (spec_char, TRUE);
return ret_str;
}
/* --------------------------------------------------------------------------------------------- */
static mc_search__found_cond_t
mc_search__regex_found_cond_one (mc_search_t * lc_mc_search, mc_search_regex_t * regex,
GString * search_str)
{
#ifdef SEARCH_TYPE_GLIB
GError *error = NULL;
if (!g_regex_match_full (regex, search_str->str, search_str->len, 0, G_REGEX_MATCH_NEWLINE_ANY,
&lc_mc_search->regex_match_info, &error))
{
g_match_info_free (lc_mc_search->regex_match_info);
lc_mc_search->regex_match_info = NULL;
if (error)
{
lc_mc_search->error = MC_SEARCH_E_REGEX;
lc_mc_search->error_str =
str_conv_gerror_message (error, _("Regular expression error"));
g_error_free (error);
return COND__FOUND_ERROR;
}
return COND__NOT_FOUND;
}
lc_mc_search->num_results = g_match_info_get_match_count (lc_mc_search->regex_match_info);
#else /* SEARCH_TYPE_GLIB */
lc_mc_search->num_results = pcre_exec (regex, lc_mc_search->regex_match_info,
search_str->str, search_str->len, 0, 0,
lc_mc_search->iovector, MC_SEARCH__NUM_REPLACE_ARGS);
if (lc_mc_search->num_results < 0)
{
return COND__NOT_FOUND;
}
#endif /* SEARCH_TYPE_GLIB */
return COND__FOUND_OK;
}
/* --------------------------------------------------------------------------------------------- */
static mc_search__found_cond_t
mc_search__regex_found_cond (mc_search_t * lc_mc_search, GString * search_str)
{
gsize loop1;
for (loop1 = 0; loop1 < lc_mc_search->conditions->len; loop1++)
{
mc_search_cond_t *mc_search_cond;
mc_search__found_cond_t ret;
mc_search_cond = (mc_search_cond_t *) g_ptr_array_index (lc_mc_search->conditions, loop1);
if (!mc_search_cond->regex_handle)
continue;
ret =
mc_search__regex_found_cond_one (lc_mc_search, mc_search_cond->regex_handle,
search_str);
if (ret != COND__NOT_FOUND)
return ret;
}
return COND__NOT_ALL_FOUND;
}
/* --------------------------------------------------------------------------------------------- */
static int
mc_search_regex__get_max_num_of_replace_tokens (const gchar * str, gsize len)
{
int max_token = 0;
gsize loop;
for (loop = 0; loop < len - 1; loop++)
{
if (str[loop] == '\\' && g_ascii_isdigit (str[loop + 1]))
{
if (strutils_is_char_escaped (str, &str[loop]))
continue;
if (max_token < str[loop + 1] - '0')
max_token = str[loop + 1] - '0';
continue;
}
if (str[loop] == '$' && str[loop + 1] == '{')
{
gsize tmp_len;
if (strutils_is_char_escaped (str, &str[loop]))
continue;
for (tmp_len = 0;
loop + tmp_len + 2 < len && (str[loop + 2 + tmp_len] & (char) 0xf0) == 0x30;
tmp_len++);
if (str[loop + 2 + tmp_len] == '}')
{
int tmp_token;
char *tmp_str;
tmp_str = g_strndup (&str[loop + 2], tmp_len);
tmp_token = atoi (tmp_str);
if (max_token < tmp_token)
max_token = tmp_token;
g_free (tmp_str);
}
}
}
return max_token;
}
/* --------------------------------------------------------------------------------------------- */
static char *
mc_search_regex__get_token_by_num (const mc_search_t * lc_mc_search, gsize lc_index)
{
int fnd_start = 0, fnd_end = 0;
#ifdef SEARCH_TYPE_GLIB
g_match_info_fetch_pos (lc_mc_search->regex_match_info, lc_index, &fnd_start, &fnd_end);
#else /* SEARCH_TYPE_GLIB */
fnd_start = lc_mc_search->iovector[lc_index * 2 + 0];
fnd_end = lc_mc_search->iovector[lc_index * 2 + 1];
#endif /* SEARCH_TYPE_GLIB */
if (fnd_end - fnd_start == 0)
return NULL;
return g_strndup (lc_mc_search->regex_buffer->str + fnd_start, fnd_end - fnd_start);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
mc_search_regex__replace_handle_esc_seq (const GString * replace_str, const gsize current_pos,
gsize * skip_len, int *ret)
{
char *curr_str = &(replace_str->str[current_pos]);
char c = *(curr_str + 1);
if (replace_str->len > current_pos + 2)
{
if (c == '{')
{
for (*skip_len = 2; /* \{ */
current_pos + *skip_len < replace_str->len
&& *(curr_str + *skip_len) >= '0'
&& *(curr_str + *skip_len) <= '7'; (*skip_len)++);
if (current_pos + *skip_len < replace_str->len && *(curr_str + *skip_len) == '}')
{
(*skip_len)++;
*ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
return FALSE;
}
else
{
*ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
return TRUE;
}
}
if (c == 'x')
{
*skip_len = 2; /* \x */
c = *(curr_str + 2);
if (c == '{')
{
for (*skip_len = 3; /* \x{ */
current_pos + *skip_len < replace_str->len
&& g_ascii_isxdigit ((guchar) * (curr_str + *skip_len)); (*skip_len)++);
if (current_pos + *skip_len < replace_str->len && *(curr_str + *skip_len) == '}')
{
(*skip_len)++;
*ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
return FALSE;
}
else
{
*ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
return TRUE;
}
}
else if (!g_ascii_isxdigit ((guchar) c))
{
*skip_len = 2; /* \x without number behind */
*ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
return FALSE;
}
else
{
c = *(curr_str + 3);
if (!g_ascii_isxdigit ((guchar) c))
*skip_len = 3; /* \xH */
else
*skip_len = 4; /* \xHH */
*ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
return FALSE;
}
}
}
if (strchr ("ntvbrfa", c) != NULL)
{
*skip_len = 2;
*ret = REPLACE_PREPARE_T_ESCAPE_SEQ;
return FALSE;
}
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
static int
mc_search_regex__process_replace_str (const GString * replace_str, const gsize current_pos,
gsize * skip_len, replace_transform_type_t * replace_flags)
{
int ret = -1;
const char *curr_str = &(replace_str->str[current_pos]);
if (current_pos > replace_str->len)
return REPLACE_PREPARE_T_NOTHING_SPECIAL;
*skip_len = 0;
if ((*curr_str == '$') && (*(curr_str + 1) == '{') && ((*(curr_str + 2) & (char) 0xf0) == 0x30)
&& (replace_str->len > current_pos + 2))
{
char *tmp_str;
if (strutils_is_char_escaped (replace_str->str, curr_str))
{
*skip_len = 1;
return REPLACE_PREPARE_T_NOTHING_SPECIAL;
}
for (*skip_len = 0;
current_pos + *skip_len + 2 < replace_str->len
&& (*(curr_str + 2 + *skip_len) & (char) 0xf0) == 0x30; (*skip_len)++);
if (*(curr_str + 2 + *skip_len) != '}')
return REPLACE_PREPARE_T_NOTHING_SPECIAL;
tmp_str = g_strndup (curr_str + 2, *skip_len);
if (tmp_str == NULL)
return REPLACE_PREPARE_T_NOTHING_SPECIAL;
ret = atoi (tmp_str);
g_free (tmp_str);
*skip_len += 3; /* ${} */
return ret; /* capture buffer index >= 0 */
}
if ((*curr_str == '\\') && (replace_str->len > current_pos + 1))
{
if (strutils_is_char_escaped (replace_str->str, curr_str))
{
*skip_len = 1;
return REPLACE_PREPARE_T_NOTHING_SPECIAL;
}
if (g_ascii_isdigit (*(curr_str + 1)))
{
ret = g_ascii_digit_value (*(curr_str + 1)); /* capture buffer index >= 0 */
*skip_len = 2; /* \\ and one digit */
return ret;
}
if (!mc_search_regex__replace_handle_esc_seq (replace_str, current_pos, skip_len, &ret))
return ret;
ret = REPLACE_PREPARE_T_REPLACE_FLAG;
*skip_len += 2;
switch (*(curr_str + 1))
{
case 'U':
*replace_flags |= REPLACE_T_UPP_TRANSFORM;
*replace_flags &= ~REPLACE_T_LOW_TRANSFORM;
break;
case 'u':
*replace_flags |= REPLACE_T_UPP_TRANSFORM_CHAR;
break;
case 'L':
*replace_flags |= REPLACE_T_LOW_TRANSFORM;
*replace_flags &= ~REPLACE_T_UPP_TRANSFORM;
break;
case 'l':
*replace_flags |= REPLACE_T_LOW_TRANSFORM_CHAR;
break;
case 'E':
*replace_flags = REPLACE_T_NO_TRANSFORM;
break;
default:
ret = REPLACE_PREPARE_T_NOTHING_SPECIAL;
break;
}
}
return ret;
}
/* --------------------------------------------------------------------------------------------- */
static void
mc_search_regex__process_append_str (GString * dest_str, const char *from, gsize len,
replace_transform_type_t * replace_flags)
{
gsize loop;
gsize char_len;
if (len == (gsize) (-1))
len = strlen (from);
if ((*replace_flags == REPLACE_T_NO_TRANSFORM) != 0)
{
g_string_append_len (dest_str, from, len);
return;
}
for (loop = 0; loop < len; loop += char_len)
{
GString *tmp_string = NULL;
char *tmp_str;
tmp_str = mc_search__get_one_symbol (NULL, from + loop, len - loop, NULL);
char_len = strlen (tmp_str);
if ((*replace_flags & REPLACE_T_UPP_TRANSFORM_CHAR) != 0)
{
*replace_flags &= ~REPLACE_T_UPP_TRANSFORM_CHAR;
tmp_string = mc_search__toupper_case_str (NULL, tmp_str, char_len);
g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
g_string_free (tmp_string, TRUE);
}
else if ((*replace_flags & REPLACE_T_LOW_TRANSFORM_CHAR) != 0)
{
*replace_flags &= ~REPLACE_T_LOW_TRANSFORM_CHAR;
tmp_string = mc_search__tolower_case_str (NULL, tmp_str, char_len);
g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
g_string_free (tmp_string, TRUE);
}
else if ((*replace_flags & REPLACE_T_UPP_TRANSFORM) != 0)
{
tmp_string = mc_search__toupper_case_str (NULL, tmp_str, char_len);
g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
g_string_free (tmp_string, TRUE);
}
else if ((*replace_flags & REPLACE_T_LOW_TRANSFORM) != 0)
{
tmp_string = mc_search__tolower_case_str (NULL, tmp_str, char_len);
g_string_append_len (dest_str, tmp_string->str, tmp_string->len);
g_string_free (tmp_string, TRUE);
}
else
{
g_string_append_len (dest_str, tmp_str, tmp_string->len);
}
g_free (tmp_str);
}
}
/* --------------------------------------------------------------------------------------------- */
static void
mc_search_regex__process_escape_sequence (GString * dest_str, const char *from, gsize len,
replace_transform_type_t * replace_flags,
gboolean is_utf8)
{
gsize i = 0;
unsigned int c = 0;
char b;
if (len == (gsize) (-1))
len = strlen (from);
if (len == 0)
return;
if (from[i] == '{')
i++;
if (i >= len)
return;
if (from[i] == 'x')
{
i++;
if (i < len && from[i] == '{')
i++;
for (; i < len; i++)
{
if (from[i] >= '0' && from[i] <= '9')
c = c * 16 + from[i] - '0';
else if (from[i] >= 'a' && from[i] <= 'f')
c = c * 16 + 10 + from[i] - 'a';
else if (from[i] >= 'A' && from[i] <= 'F')
c = c * 16 + 10 + from[i] - 'A';
else
break;
}
}
else if (from[i] >= '0' && from[i] <= '7')
for (; i < len && from[i] >= '0' && from[i] <= '7'; i++)
c = c * 8 + from[i] - '0';
else
{
switch (from[i])
{
case 'n':
c = '\n';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
case 'b':
c = '\b';
break;
case 'r':
c = '\r';
break;
case 'f':
c = '\f';
break;
case 'a':
c = '\a';
break;
default:
mc_search_regex__process_append_str (dest_str, from, len, replace_flags);
return;
}
}
if (c < 0x80 || !is_utf8)
g_string_append_c (dest_str, (char) c);
else if (c < 0x800)
{
b = 0xC0 | (c >> 6);
g_string_append_c (dest_str, b);
b = 0x80 | (c & 0x3F);
g_string_append_c (dest_str, b);
}
else if (c < 0x10000)
{
b = 0xE0 | (c >> 12);
g_string_append_c (dest_str, b);
b = 0x80 | ((c >> 6) & 0x3F);
g_string_append_c (dest_str, b);
b = 0x80 | (c & 0x3F);
g_string_append_c (dest_str, b);
}
else if (c < 0x10FFFF)
{
b = 0xF0 | (c >> 16);
g_string_append_c (dest_str, b);
b = 0x80 | ((c >> 12) & 0x3F);
g_string_append_c (dest_str, b);
b = 0x80 | ((c >> 6) & 0x3F);
g_string_append_c (dest_str, b);
b = 0x80 | (c & 0x3F);
g_string_append_c (dest_str, b);
}
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
void
mc_search__cond_struct_new_init_regex (const char *charset, mc_search_t * lc_mc_search,
mc_search_cond_t * mc_search_cond)
{
#ifdef SEARCH_TYPE_GLIB
GError *error = NULL;
if (!lc_mc_search->is_case_sensitive)
{
GString *tmp;
tmp = mc_search_cond->str;
mc_search_cond->str = mc_search__cond_struct_new_regex_ci_str (charset, tmp);
g_string_free (tmp, TRUE);
}
mc_search_cond->regex_handle =
g_regex_new (mc_search_cond->str->str, G_REGEX_OPTIMIZE | G_REGEX_RAW | G_REGEX_DOTALL,
0, &error);
if (error != NULL)
{
lc_mc_search->error = MC_SEARCH_E_REGEX_COMPILE;
lc_mc_search->error_str = str_conv_gerror_message (error, _("Regular expression error"));
g_error_free (error);
return;
}
#else /* SEARCH_TYPE_GLIB */
const char *error;
int erroffset;
int pcre_options = PCRE_EXTRA | PCRE_MULTILINE;
if (str_isutf8 (charset) && mc_global.utf8_display)
{
pcre_options |= PCRE_UTF8;
if (!lc_mc_search->is_case_sensitive)
pcre_options |= PCRE_CASELESS;
}
else
{
if (!lc_mc_search->is_case_sensitive)
{
GString *tmp;
tmp = mc_search_cond->str;
mc_search_cond->str = mc_search__cond_struct_new_regex_ci_str (charset, tmp);
g_string_free (tmp, TRUE);
}
}
mc_search_cond->regex_handle =
pcre_compile (mc_search_cond->str->str, pcre_options, &error, &erroffset, NULL);
if (mc_search_cond->regex_handle == NULL)
{
lc_mc_search->error = MC_SEARCH_E_REGEX_COMPILE;
lc_mc_search->error_str = g_strdup (error);
return;
}
lc_mc_search->regex_match_info = pcre_study (mc_search_cond->regex_handle, 0, &error);
if (lc_mc_search->regex_match_info == NULL)
{
if (error)
{
lc_mc_search->error = MC_SEARCH_E_REGEX_COMPILE;
lc_mc_search->error_str = g_strdup (error);
g_free (mc_search_cond->regex_handle);
mc_search_cond->regex_handle = NULL;
return;
}
}
#endif /* SEARCH_TYPE_GLIB */
lc_mc_search->is_utf8 = str_isutf8 (charset);
}
/* --------------------------------------------------------------------------------------------- */
gboolean
mc_search__run_regex (mc_search_t * lc_mc_search, const void *user_data,
gsize start_search, gsize end_search, gsize * found_len)
{
mc_search_cbret_t ret = MC_SEARCH_CB_ABORT;
gsize current_pos, virtual_pos;
gint start_pos;
gint end_pos;
if (lc_mc_search->regex_buffer != NULL)
g_string_free (lc_mc_search->regex_buffer, TRUE);
lc_mc_search->regex_buffer = g_string_sized_new (64);
virtual_pos = current_pos = start_search;
while (virtual_pos <= end_search)
{
g_string_set_size (lc_mc_search->regex_buffer, 0);
lc_mc_search->start_buffer = current_pos;
if (lc_mc_search->search_fn != NULL)
{
while (TRUE)
{
int current_chr = '\n'; /* stop search symbol */
ret = lc_mc_search->search_fn (user_data, current_pos, &current_chr);
if (ret == MC_SEARCH_CB_ABORT)
break;
if (ret == MC_SEARCH_CB_INVALID)
continue;
current_pos++;
if (ret == MC_SEARCH_CB_SKIP)
continue;
virtual_pos++;
g_string_append_c (lc_mc_search->regex_buffer, (char) current_chr);
if ((char) current_chr == '\n' || virtual_pos > end_search)
break;
}
}
else
{
/* optimization for standard case (for search from file manager)
* where there is no MC_SEARCH_CB_INVALID or MC_SEARCH_CB_SKIP
* return codes, so we can copy line at regex buffer all at once
*/
while (TRUE)
{
char current_chr;
current_chr = ((char *) user_data)[current_pos];
if (current_chr == '\0')
break;
current_pos++;
if (current_chr == '\n' || current_pos > end_search)
break;
}
/* use virtual_pos as index of start of current chunk */
g_string_append_len (lc_mc_search->regex_buffer, (char *) user_data + virtual_pos,
current_pos - virtual_pos);
virtual_pos = current_pos;
}
switch (mc_search__regex_found_cond (lc_mc_search, lc_mc_search->regex_buffer))
{
case COND__FOUND_OK:
#ifdef SEARCH_TYPE_GLIB
if (lc_mc_search->whole_words)
g_match_info_fetch_pos (lc_mc_search->regex_match_info, 2, &start_pos, &end_pos);
else
g_match_info_fetch_pos (lc_mc_search->regex_match_info, 0, &start_pos, &end_pos);
#else /* SEARCH_TYPE_GLIB */
if (lc_mc_search->whole_words)
{
start_pos = lc_mc_search->iovector[4];
end_pos = lc_mc_search->iovector[5];
}
else
{
start_pos = lc_mc_search->iovector[0];
end_pos = lc_mc_search->iovector[1];
}
#endif /* SEARCH_TYPE_GLIB */
if (found_len != NULL)
*found_len = end_pos - start_pos;
lc_mc_search->normal_offset = lc_mc_search->start_buffer + start_pos;
return TRUE;
case COND__NOT_ALL_FOUND:
break;
default:
g_string_free (lc_mc_search->regex_buffer, TRUE);
lc_mc_search->regex_buffer = NULL;
return FALSE;
}
if ((lc_mc_search->update_fn != NULL) &&
((lc_mc_search->update_fn) (user_data, current_pos) == MC_SEARCH_CB_ABORT))
ret = MC_SEARCH_CB_ABORT;
if (ret == MC_SEARCH_CB_ABORT)
break;
}
g_string_free (lc_mc_search->regex_buffer, TRUE);
lc_mc_search->regex_buffer = NULL;
lc_mc_search->error = MC_SEARCH_E_NOTFOUND;
if (ret != MC_SEARCH_CB_ABORT)
lc_mc_search->error_str = g_strdup (_(STR_E_NOTFOUND));
else
lc_mc_search->error_str = NULL;
return FALSE;
}
/* --------------------------------------------------------------------------------------------- */
GString *
mc_search_regex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
{
GString *ret;
gchar *tmp_str;
int num_replace_tokens;
gsize loop;
gsize len = 0;
gchar *prev_str;
replace_transform_type_t replace_flags = REPLACE_T_NO_TRANSFORM;
num_replace_tokens =
mc_search_regex__get_max_num_of_replace_tokens (replace_str->str, replace_str->len);
if (lc_mc_search->num_results < 0)
return g_string_new_len (replace_str->str, replace_str->len);
if (num_replace_tokens > lc_mc_search->num_results - 1
|| num_replace_tokens > MC_SEARCH__NUM_REPLACE_ARGS)
{
lc_mc_search->error = MC_SEARCH_E_REGEX_REPLACE;
lc_mc_search->error_str = g_strdup (_(STR_E_RPL_NOT_EQ_TO_FOUND));
return NULL;
}
ret = g_string_sized_new (64);
prev_str = replace_str->str;
for (loop = 0; loop < replace_str->len - 1; loop++)
{
int lc_index;
lc_index = mc_search_regex__process_replace_str (replace_str, loop, &len, &replace_flags);
if (lc_index == REPLACE_PREPARE_T_NOTHING_SPECIAL)
{
if (len != 0)
{
mc_search_regex__process_append_str (ret, prev_str,
replace_str->str - prev_str + loop,
&replace_flags);
mc_search_regex__process_append_str (ret, replace_str->str + loop + 1, len - 1,
&replace_flags);
prev_str = replace_str->str + loop + len;
loop += len - 1;
}
continue;
}
if (lc_index == REPLACE_PREPARE_T_REPLACE_FLAG)
{
if (loop)
mc_search_regex__process_append_str (ret, prev_str,
replace_str->str - prev_str + loop,
&replace_flags);
prev_str = replace_str->str + loop + len;
loop += len - 1;
continue;
}
/* escape sequence */
if (lc_index == REPLACE_PREPARE_T_ESCAPE_SEQ)
{
mc_search_regex__process_append_str (ret, prev_str,
replace_str->str + loop - prev_str,
&replace_flags);
/* call process_escape_sequence without starting '\\' */
mc_search_regex__process_escape_sequence (ret, replace_str->str + loop + 1, len - 1,
&replace_flags, lc_mc_search->is_utf8);
prev_str = replace_str->str + loop + len;
loop += len - 1;
continue;
}
/* invalid capture buffer number */
if (lc_index > lc_mc_search->num_results)
{
g_string_free (ret, TRUE);
lc_mc_search->error = MC_SEARCH_E_REGEX_REPLACE;
lc_mc_search->error_str = g_strdup_printf (_(STR_E_RPL_INVALID_TOKEN), lc_index);
return NULL;
}
tmp_str = mc_search_regex__get_token_by_num (lc_mc_search, lc_index);
if (tmp_str == NULL)
continue;
if (loop)
mc_search_regex__process_append_str (ret, prev_str, replace_str->str - prev_str + loop,
&replace_flags);
prev_str = replace_str->str + loop + len;
mc_search_regex__process_append_str (ret, tmp_str, -1, &replace_flags);
g_free (tmp_str);
loop += len - 1;
}
mc_search_regex__process_append_str (ret, prev_str,
replace_str->str - prev_str + replace_str->len,
&replace_flags);
return ret;
}
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