1 files changed, 65 insertions, 0 deletions
diff --git a/lib/varbuf.c b/lib/varbuf.c
new file mode 100644
index 000000000..2f12db774
--- /dev/null
+++ b/lib/varbuf.c
@@ -0,0 +1,65 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * varbuf.c - variable length expandable buffer handling
+ *
+ * Copyright (C) 1994,1995 Ian Jackson <iwj10@cus.cam.ac.uk>
+ *
+ * This 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,
+ * or (at your option) any later version.
+ *
+ * This 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 dpkg; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdlib.h>
+
+#include "config.h"
+#include "dpkg.h"
+#include "dpkg-db.h"
+
+void varbufaddc(struct varbuf *v, int c) {
+  if (v->used >= v->size) varbufextend(v);
+  v->buf[v->used++]= c;
+}
+
+void varbufaddstr(struct varbuf *v, const char *s) {
+  int l, ou;
+  l= strlen(s);
+  ou= v->used;
+  v->used += l;
+  if (v->used >= v->size) varbufextend(v);
+  memcpy(v->buf + ou, s, l);
+}
+
+void varbufinit(struct varbuf *v) {
+  /* NB: dbmodify.c does its own init to get a big buffer */
+  v->size= v->used= 0;
+  v->buf= 0;
+}
+
+void varbufreset(struct varbuf *v) {
+  v->used= 0;
+}
+
+void varbufextend(struct varbuf *v) {
+  int newsize;
+  char *newbuf;
+
+  newsize= v->size + 80 + v->used;
+  newbuf= realloc(v->buf,newsize);
+  if (!newbuf) ohshite("failed to realloc for variable buffer");
+  v->size= newsize;
+  v->buf= newbuf;
+}
+
+void varbuffree(struct varbuf *v) {
+  free(v->buf); v->buf=0; v->size=0; v->used=0;
+}