This commit was manufactured by cvs2svn to create tag 'start'.start

1 files changed, 136 insertions, 0 deletions

diff --git a/libopenjpeg/cio.c b/libopenjpeg/cio.c
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+/*
+ * Copyright (c) 2001-2002, David Janssens
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cio.h"
+#include <setjmp.h>
+
+static unsigned char *cio_start, *cio_end, *cio_bp;
+
+extern jmp_buf j2k_error;
+
+/* <summary> */
+/* Number of bytes written. */
+/* </summary> */
+int cio_numbytes()
+{
+	return cio_bp - cio_start;
+}
+
+/* <summary> */
+/* Get position in byte stream. */
+/* </summary> */
+int cio_tell()
+{
+	return cio_bp - cio_start;
+}
+
+/* <summary> */
+/* Set position in byte stream. */
+/* </summary> */
+void cio_seek(int pos)
+{
+	cio_bp = cio_start + pos;
+}
+
+/* <summary> */
+/* Number of bytes left before the end of the stream. */
+/* </summary> */
+int cio_numbytesleft()
+{
+	return cio_end - cio_bp;
+}
+
+/* <summary> */
+/* Get pointer to the current position in the stream. */
+/* </summary> */
+unsigned char *cio_getbp()
+{
+	return cio_bp;
+}
+
+/* <summary> */
+/* Initialize byte IO. */
+/* </summary> */
+void cio_init(unsigned char *bp, int len)
+{
+	cio_start = bp;
+	cio_end = bp + len;
+	cio_bp = bp;
+}
+
+/* <summary> */
+/* Write a byte. */
+/* </summary> */
+void cio_byteout(unsigned char v)
+{
+	if (cio_bp >= cio_end)
+		longjmp(j2k_error, 1);
+	*cio_bp++ = v;
+
+}
+
+/* <summary> */
+/* Read a byte. */
+/* </summary> */
+unsigned char cio_bytein()
+{
+	if (cio_bp >= cio_end)
+		longjmp(j2k_error, 1);
+	return *cio_bp++;
+}
+
+/* <summary> */
+/* Write a byte. */
+/* </summary> */
+void cio_write(unsigned int v, int n)
+{
+	int i;
+	for (i = n - 1; i >= 0; i--) {
+		cio_byteout((unsigned char) ((v >> (i << 3)) & 0xff));
+	}
+}
+
+/* <summary> */
+/* Read some bytes. */
+/* </summary> */
+unsigned int cio_read(int n)
+{
+	int i;
+	unsigned int v;
+	v = 0;
+	for (i = n - 1; i >= 0; i--) {
+		v += cio_bytein() << (i << 3);
+	}
+	return v;
+}
+
+/* <summary> */
+/* Write some bytes. */
+/* </summary> */
+void cio_skip(int n)
+{
+	cio_bp += n;
+}