Initial revision

1 files changed, 152 insertions, 0 deletions

diff --git a/jpwl/decoder/libopenjpeg/cio.c b/jpwl/decoder/libopenjpeg/cio.c
new file mode 100644
index 00000000..7aecffca
--- /dev/null
+++ b/jpwl/decoder/libopenjpeg/cio.c
@@ -0,0 +1,152 @@
+/*
+ * 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;	/* pointer to the start of the stream */
+static unsigned char *cio_end;	/* pointer to the end of the stream */
+static unsigned char *cio_bp;	/* pointer to the present position */
+
+extern jmp_buf j2k_error;
+
+/* 
+ * Number of bytes written.
+ */
+int cio_numbytes()
+{
+  return cio_bp - cio_start;
+}
+
+/*
+ * Get position in byte stream.
+ */
+int cio_tell()
+{
+  return cio_bp - cio_start;
+}
+
+/*
+ * Set position in byte stream.
+ *
+ * pos : position, in number of bytes, from the beginning of the stream
+ */
+void cio_seek(int pos)
+{
+  cio_bp = cio_start + pos;
+}
+
+/*
+ * Number of bytes left before the end of the stream.
+ */
+int cio_numbytesleft()
+{
+  return cio_end - cio_bp;
+}
+
+/*
+ * Get pointer to the current position in the stream.
+ */
+unsigned char *cio_getbp()
+{
+  return cio_bp;
+}
+
+/* 
+ * Initialize byte IO
+ *
+ * bp  : destination/source stream
+ * len : length of the stream
+ */
+void cio_init(unsigned char *bp, int len)
+{
+  cio_start = bp;
+  cio_end = bp + len;
+  cio_bp = bp;
+}
+
+/*
+ * Write a byte.
+ */
+void cio_byteout(unsigned char v)
+{
+  if (cio_bp >= cio_end)
+    longjmp(j2k_error, 1);
+  *cio_bp++ = v;
+
+}
+
+/*
+ * Read a byte.
+ */
+unsigned char cio_bytein()
+{
+  if (cio_bp >= cio_end)
+    longjmp(j2k_error, 1);
+  return *cio_bp++;
+}
+
+/*
+ * Write some bytes.
+ *
+ * v : value to write
+ * n : number of bytes to write
+ */
+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));
+  }
+}
+
+/*
+ * Read some bytes.
+ *
+ * n : number of bytes to read
+ *
+ * return : value of the n bytes read
+ */
+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;
+}
+
+/* 
+ * Skip some bytes.
+ *
+ * n : number of bytes to skip
+ */
+void cio_skip(int n)
+{
+  cio_bp += n;
+}