1 files changed, 84 insertions, 0 deletions
diff --git a/src/slide.c b/src/slide.c
new file mode 100644
index 0000000..e20d0be
--- /dev/null
+++ b/src/slide.c
@@ -0,0 +1,84 @@
+/*
+ * slide.c:
+ *
+ * Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
+ * All rights reserved.
+ *
+ */
+
+static char rcsid[] = "$Id$";
+
+/*
+ * $Log$
+ * Revision 1.1  2008/02/13 16:57:29  james
+ * *** empty log message ***
+ *
+ * Revision 1.3  2008/02/13 09:12:21  james
+ * *** empty log message ***
+ *
+ * Revision 1.2  2008/02/12 22:36:46  james
+ * *** empty log message ***
+ *
+ * Revision 1.1  2008/02/08 15:06:42  james
+ * *** empty log message ***
+ *
+ */
+
+#include "project.h"
+
+void
+slide_free (Slide * s)
+{
+  free (s->slide);
+  free (s);
+}
+
+void
+slide_consume (Slide * s, int n)
+{
+  s->nbytes -= n;
+  memmove (s->slide, s->slide + n, s->nbytes);
+
+  if ((s->size > s->target_size) && (s->nbytes <= s->size))
+    {
+      s->size = s->target_size;
+      s->slide = realloc (s->slide, s->size);
+    }
+
+}
+
+void
+slide_added (Slide * s, int n)
+{
+  s->nbytes += n;
+}
+
+Slide *
+slide_new (int n)
+{
+  Slide *ret = (Slide *) malloc (sizeof (Slide));
+
+  ret->slide = (uint8_t *) malloc (n);
+  ret->size = n;
+  ret->target_size = n;
+  ret->nbytes = 0;
+
+  return ret;
+}
+
+
+void
+slide_expand (Slide * s, int n)
+{
+  n += s->nbytes;
+
+  if (n <= s->size)
+    return;
+
+  while (n > s->size)
+    s->size <<= 1;
+
+//FIXME -- might fail
+  s->slide = realloc (s->slide, s->size);
+
+}