(svn r26498) -Add: method for duplicating strings with similar behaviours as strecpy and strecat; give end pointer instead of a size

src/string.cpp

@@ -113,6 +113,21 @@ char *strecpy(char *dst, const char *src, const char *last)
 	return dst;
 }
 
+/**
+ * Create a duplicate of the given string.
+ * @param s    The string to duplicate.
+ * @param last The last character that is safe to duplicate. If NULL, the whole string is duplicated.
+ * @note The maximum length of the resulting string might therefore be last - s + 1.
+ * @return The duplicate of the string.
+ */
+char *stredup(const char *s, const char *last)
+{
+	size_t len = last == NULL ? strlen(s) : ttd_strnlen(s, last - s + 1);
+	char *tmp = CallocT<char>(len + 1);
+	memcpy(tmp, s, len);
+	return tmp;
+}
+
 /**
  * Format, "printf", into a newly allocated string.
  * @param str The formatting string.

src/string_func.h

@@ -31,6 +31,7 @@
 
 char *strecat(char *dst, const char *src, const char *last);
 char *strecpy(char *dst, const char *src, const char *last);
+char *stredup(const char *src, const char *last = NULL);
 
 int CDECL seprintf(char *str, const char *last, const char *format, ...) WARN_FORMAT(3, 4);