From f744dace3f0f91b8505979bf244453c9ec713b4b Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Sat, 28 Feb 2009 13:00:34 +0100
Subject: Moved Fitz files into one directory.

---
 fitz/stm_buffer.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 fitz/stm_buffer.c

(limited to 'fitz/stm_buffer.c')

diff --git a/fitz/stm_buffer.c b/fitz/stm_buffer.c
new file mode 100644
index 00000000..8a1e0850
--- /dev/null
+++ b/fitz/stm_buffer.c
@@ -0,0 +1,105 @@
+#include "fitz-base.h"
+#include "fitz-stream.h"
+
+fz_error *
+fz_newbuffer(fz_buffer **bp, int size)
+{
+	fz_buffer *b;
+
+	b = *bp = fz_malloc(sizeof(fz_buffer));
+	if (!b)
+		return fz_throw("outofmem: buffer struct");
+
+	b->refs = 1;
+	b->ownsdata = 1;
+	b->bp = fz_malloc(size);
+	if (!b->bp)
+	{
+		fz_free(b);
+		return fz_throw("outofmem: buffer memory");
+	}
+
+	b->rp = b->bp;
+	b->wp = b->bp;
+	b->ep = b->bp + size;
+	b->eof = 0;
+
+	return fz_okay;
+}
+
+fz_error *
+fz_newbufferwithmemory(fz_buffer **bp, unsigned char *data, int size)
+{
+	fz_buffer *b;
+
+	b = *bp = fz_malloc(sizeof(fz_buffer));
+	if (!b)
+		return fz_throw("outofmem: buffer struct");
+
+	b->refs = 1;
+	b->ownsdata = 0;
+	b->bp = data;
+
+	b->rp = b->bp;
+	b->wp = b->bp + size;
+	b->ep = b->bp + size;
+	b->eof = 0;
+
+	return fz_okay;
+}
+
+fz_buffer *
+fz_keepbuffer(fz_buffer *buf)
+{
+	buf->refs ++;
+	return buf;
+}
+
+void
+fz_dropbuffer(fz_buffer *buf)
+{
+	if (--buf->refs == 0)
+	{
+		if (buf->ownsdata)
+			fz_free(buf->bp);
+		fz_free(buf);
+	}
+}
+
+fz_error *
+fz_growbuffer(fz_buffer *buf)
+{
+	unsigned char *newbp;
+
+	int rp = buf->rp - buf->bp;
+	int wp = buf->wp - buf->bp;
+	int ep = buf->ep - buf->bp;
+
+	if (!buf->ownsdata)
+		return fz_throw("assert: grow borrowed memory");
+
+	newbp = fz_realloc(buf->bp, ep * 2);
+	if (!newbp)
+		return fz_throw("outofmem: resize buffer memory");
+
+	buf->bp = newbp;
+	buf->rp = buf->bp + rp;
+	buf->wp = buf->bp + wp;
+	buf->ep = buf->bp + ep * 2;
+
+	return fz_okay;
+}
+
+fz_error *
+fz_rewindbuffer(fz_buffer *buf)
+{
+	if (!buf->ownsdata)
+		return fz_throw("assert: rewind borrowed memory");
+
+	memmove(buf->bp, buf->rp, buf->wp - buf->rp);
+	buf->wp = buf->bp + (buf->wp - buf->rp);
+	buf->rp = buf->bp;
+
+	return fz_okay;
+}
+
-- 
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