2 Copyright (C) 2011-2014 jeanfi@gmail.com
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24 char *strrep(char *str, const char *old, const char *new)
32 if (!*str || !old || !*old || !new || !strcmp(old, new))
40 res = malloc(strlen(str) + (new ? strlen(new) : 0) - strlen(old) + 1);
44 strncpy(res, str, pos);
48 strcat(res + pos, new);
50 strcat(res, str + pos + strlen(old));
56 Derivated from http://stackoverflow.com/questions/779875/what-is-the-function-to-replace-string-in-c
58 char *strrepg(char *orig, const char *rep, const char *with) {
59 char *result; // the return string
60 char *ins; // the next insert point
62 int len_rep; // length of rep
63 int len_with; // length of with
64 int len_front; // distance between rep and end of last rep
65 int count; // number of replacements
71 len_rep = strlen(rep);
74 len_with = strlen(with);
77 for(count = 0; (tmp = strstr(ins, rep)); count++) {
81 // first time through the loop, all the variable are set correctly
83 // tmp points to the end of the result string
84 // ins points to the next occurrence of rep in orig
85 // orig points to the remainder of orig after "end of rep"
86 tmp = result = malloc(strlen(orig) + (len_with - len_rep) * count + 1);
92 ins = strstr(orig, rep);
93 len_front = ins - orig;
94 tmp = strncpy(tmp, orig, len_front) + len_front;
95 tmp = strcpy(tmp, with) + len_with;
96 orig += len_front + len_rep; // move to next "end of rep"