Merge pull request #32 from TheFox/readme

[smdp.git] / cstring.c

diff --git a/cstring.c b/cstring.c
index e7308ef..958062b 100644 (file)
--- a/cstring.c
+++ b/cstring.c
@@ -1,3 +1,24 @@
+/*
+ * An implementation of expandable c strings in heap memory.
+ * Copyright (C) 2014 Michael Goehler
+ *
+ * This file is part of mdp.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 #include <string.h> // strlen
 #include <stdlib.h> // malloc, realloc
 
@@ -26,11 +47,12 @@ void cstring_expand(cstring_t *self, char x) {
 
 void cstring_expand_arr(cstring_t *self, char *x) {
     if(self->size + strlen(x) + sizeof(char) > self->alloc) {
-        self->alloc += (REALLOC_ADD * sizeof(char));
+        self->alloc = ((strlen(x) + self->size + 1) * sizeof(char));
         self->text = realloc(self->text, self->alloc);
     }
     self->text = strcat(self->text, x);
     self->size = strlen(self->text);
+    self->text[self->size+1] = '\0';
 }
 
 void cstring_reset(cstring_t *self) {