1 files changed, 38 insertions, 0 deletions
diff --git a/src/string-util.c b/src/string-util.c
index e183288..d5a702b 100644
--- a/src/string-util.c
+++ b/src/string-util.c
@@ -19,6 +19,7 @@
 
 #include <sys/types.h>
 #include <string.h>
+#include <stdlib.h>
 
 /*
  * Copy src to string dst of size siz.  At most siz-1 characters
@@ -83,3 +84,40 @@ size_t strlcat(char *dst, const char *src, size_t siz)
 
     return (dlen + (s - src)); /* count does not include NUL */
 }
+
+char *str_replace(const char *str, const char *old, const char *new)
+{
+    const char *ins;
+    char *result, *tmp;
+    size_t len_old, len_new, len_front, len_result;
+    int count;
+
+    if (!str || !old || !new)
+        return NULL;
+    len_old = strlen(old);
+    if (len_old == 0)
+        return NULL;
+    len_new = strlen(new);
+
+    ins = str;
+    for (count = 0; (tmp = strstr(ins, old)); ++count) {
+        ins = tmp + len_old;
+    }
+
+    len_result = strlen(str) + (len_new - len_old) * count + 1;
+    tmp = result = malloc(len_result);
+    if (!result)
+        return NULL;
+
+    while (count--) {
+        ins = strstr(str, old);
+        len_front = ins - str;
+        tmp = strncpy(tmp, str, len_front) + len_front;
+        strlcpy(tmp, new, len_result);
+        tmp += len_new;
+        str += len_front + len_old;
+    }
+    strlcpy(tmp, str, len_result);
+    return result;
+}
+