X-Git-Url: https://git.dlugolecki.net.pl/?a=blobdiff_plain;f=gedcom%2Fbuffer.c;h=0c3e17ca8cc094ad4925f47924266faafe23bbca;hb=177218adadc7aa92a1c14e6b8b33080dc77d6e4e;hp=6f807b1dc0454083045e7e4be65c027e4e281e40;hpb=8d7d7a57b31433fad9bcfb2bb21cfa5cd1090679;p=gedcom-parse.git

diff --git a/gedcom/buffer.c b/gedcom/buffer.c
index 6f807b1..0c3e17c 100644
--- a/gedcom/buffer.c
+++ b/gedcom/buffer.c
@@ -51,8 +51,8 @@ void init_buffer(struct safe_buffer *b)
   if (b && b->buffer == NULL) {
     b->buffer = (char *)malloc(INITIAL_BUF_SIZE);
     if (b->buffer) {
-      b->buffer[0] = '\0';
       b->bufsize = INITIAL_BUF_SIZE;
+      memset(b->buffer, 0, b->bufsize);
       b->buf_end = b->buffer;
       b->buflen  = 0;
       if (b->cleanup_func && atexit(b->cleanup_func) != 0) {
@@ -70,9 +70,17 @@ void init_buffer(struct safe_buffer *b)
 
 void grow_buffer(struct safe_buffer *b)
 {
+  char* new_buffer;
+  size_t old_size = b->bufsize;
   b->bufsize *= 2;
-  b->buffer = realloc(b->buffer, b->bufsize);
-  b->buf_end = b->buffer + b->buflen;
+  new_buffer = realloc(b->buffer, b->bufsize);
+  if (new_buffer) {
+    b->buffer = new_buffer;
+    memset(b->buffer + old_size, 0, b->bufsize - old_size);
+    b->buf_end = b->buffer + b->buflen;
+  }
+  else
+    b->buffer = NULL;
 }
 
 int safe_buf_vappend(struct safe_buffer *b, const char *s, va_list ap)