mirror of
https://github.com/MidnightCommander/mc
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119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/*
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Functions for replacing substrings in strings.
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Copyright (C) 2013-2017
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Free Software Foundation, Inc.
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Written by:
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Slava Zanko <slavazanko@gmail.com>, 2013;
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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 3 of the License,
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or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "lib/global.h"
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#include "lib/strescape.h"
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#include "lib/strutil.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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/* --------------------------------------------------------------------------------------------- */
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/*** file scope functions ************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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static char *
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str_ptr_array_join (GPtrArray * str_splints)
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{
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GString *return_str;
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guint i;
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return_str = g_string_sized_new (32);
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for (i = 0; i < str_splints->len; i++)
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g_string_append (return_str, g_ptr_array_index (str_splints, i));
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return g_string_free (return_str, FALSE);
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}
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/* --------------------------------------------------------------------------------------------- */
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/*** public functions ****************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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/**
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* Replace all substrings 'needle' in string 'haystack' by 'replacement'.
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* If the 'needle' in the 'haystack' will be escaped by backslash,
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* then this occurrence isn't be replaced.
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*
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* @param haystack string contains substrings for replacement
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* @param needle string for search
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* @param replacement string for replace
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* @return newly allocated string with replaced substrings
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*/
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char *
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str_replace_all (const char *haystack, const char *needle, const char *replacement)
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{
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size_t needle_len;
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GPtrArray *str_splints;
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char *return_str;
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needle_len = strlen (needle);
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str_splints = g_ptr_array_new ();
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while (TRUE)
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{
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char *needle_in_str;
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needle_in_str = strstr (haystack, needle);
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if (needle_in_str == NULL)
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{
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if (*haystack != '\0')
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g_ptr_array_add (str_splints, g_strdup (haystack));
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break;
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}
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if (strutils_is_char_escaped (haystack, needle_in_str))
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{
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char *backslash = needle_in_str - 1;
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if (haystack != backslash)
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g_ptr_array_add (str_splints, g_strndup (haystack, backslash - haystack));
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g_ptr_array_add (str_splints, g_strndup (backslash + 1, needle_in_str - backslash));
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haystack = needle_in_str + 1;
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continue;
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}
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if (needle_in_str - haystack > 0)
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g_ptr_array_add (str_splints, g_strndup (haystack, needle_in_str - haystack));
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g_ptr_array_add (str_splints, g_strdup (replacement));
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haystack = needle_in_str + needle_len;
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}
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return_str = str_ptr_array_join (str_splints);
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g_ptr_array_foreach (str_splints, (GFunc) g_free, NULL);
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g_ptr_array_free (str_splints, TRUE);
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return return_str;
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}
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/* --------------------------------------------------------------------------------------------- */
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