mirror of https://github.com/MidnightCommander/mc
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/*
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Search text engine.
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HEX-style pattern matching
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Copyright (C) 2009 The Free Software Foundation, Inc.
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Written by:
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Slava Zanko <slavazanko@gmail.com>, 2009.
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This file is part of the Midnight Commander.
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The Midnight Commander is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include "lib/global.h"
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#include "lib/strutil.h"
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#include "lib/search.h"
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#include "lib/strescape.h"
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#include "src/charsets.h"
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#include "internal.h"
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/*** global variables ****************************************************************************/
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/*** file scope macro definitions ****************************************************************/
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/*** file scope type declarations ****************************************************************/
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/*** file scope variables ************************************************************************/
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/*** file scope functions ************************************************************************/
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static GString *
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mc_search__hex_translate_to_regex (const GString * astr)
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{
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const char *str = astr->str;
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GString *buff;
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gchar *tmp_str;
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gsize loop = 0;
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int val, ptr;
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buff = g_string_sized_new (64);
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tmp_str = g_strndup (str, astr->len);
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g_strchug (tmp_str); /* trim leadind whitespaces */
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while (loop < astr->len)
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{
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if (sscanf (tmp_str + loop, "%i%n", &val, &ptr))
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{
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gchar *tmp_str2;
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if (val < -128 || val > 255)
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{
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loop++;
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continue;
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}
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tmp_str2 = g_strdup_printf ("\\x%02X", (unsigned char) val);
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g_string_append (buff, tmp_str2);
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g_free (tmp_str2);
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loop += ptr;
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}
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else if (*(tmp_str + loop) == '"')
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{
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gsize loop2 = 0;
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loop++;
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while (loop + loop2 < astr->len)
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{
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if (*(tmp_str + loop + loop2) == '"' &&
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!strutils_is_char_escaped (tmp_str, tmp_str + loop + loop2))
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break;
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loop2++;
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}
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g_string_append_len (buff, tmp_str + loop, loop2 - 1);
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loop += loop2;
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}
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else
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loop++;
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}
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g_free (tmp_str);
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return buff;
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}
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/*** public functions ****************************************************************************/
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void
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mc_search__cond_struct_new_init_hex (const char *charset, mc_search_t * lc_mc_search,
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mc_search_cond_t * mc_search_cond)
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{
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GString *tmp;
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tmp = mc_search__hex_translate_to_regex (mc_search_cond->str);
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g_string_free (mc_search_cond->str, TRUE);
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mc_search_cond->str = tmp;
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mc_search__cond_struct_new_init_regex (charset, lc_mc_search, mc_search_cond);
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}
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/* --------------------------------------------------------------------------------------------- */
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gboolean
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mc_search__run_hex (mc_search_t * lc_mc_search, const void *user_data,
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gsize start_search, gsize end_search, gsize * found_len)
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{
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return mc_search__run_regex (lc_mc_search, user_data, start_search, end_search, found_len);
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}
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/* --------------------------------------------------------------------------------------------- */
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GString *
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mc_search_hex_prepare_replace_str (mc_search_t * lc_mc_search, GString * replace_str)
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{
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(void) lc_mc_search;
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return g_string_new_len (replace_str->str, replace_str->len);
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}
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/* --------------------------------------------------------------------------------------------- */
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