merged from plib

[ppastats.git] / src / pstr.c

diff --git a/src/pstr.c b/src/pstr.c
new file mode 100644 (file)
index 0000000..3a868ee
--- /dev/null
+++ b/src/pstr.c
@@ -0,0 +1,54 @@
+/*
+ Copyright (C) 2011-2014 jeanfi@gmail.com
+
+ This program 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 2 of the
+ License, or (at your option) any later version.
+
+ This program 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, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include <pstr.h>
+
+char *strrep(char *str, const char *old, const char *new)
+{
+       char *p, *res;
+       int pos;
+
+       if (!str)
+               return NULL;
+
+       if (!*str || !old || !*old || !new || !strcmp(old, new))
+               return str;
+
+       p = strstr(str, old);
+
+       if (!p)
+               return str;
+
+       res = malloc(strlen(str) + (new ? strlen(new) : 0) - strlen(old) + 1);
+
+       pos = p - str;
+
+       strncpy(res, str, pos);
+       res[pos] = '\0';
+
+       if (new)
+               strcat(res + pos, new);
+
+       strcat(res, str + pos + strlen(old));
+
+       return res;
+}
+