initial commit of OpenJPIP 1.0, a JPIP client-server architecture based on OpenJPEG (see README file in jpip directory for more details)

applications/jpip/libopenjpip/byte_manager.c

@@ -0,0 +1,146 @@
+/*
+ * $Id: byte_manager.c 44 2011-02-15 12:32:29Z kaori $
+ *
+ * Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2011, Professor Benoit Macq
+ * Copyright (c) 2010-2011, Kaori Hagihara
+ * 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 <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "byte_manager.h"
+
+#ifdef SERVER
+#include "fcgi_stdio.h"
+#define logstream FCGI_stdout
+#else
+#define FCGI_stdout stdout
+#define FCGI_stderr stderr
+#define logstream stderr
+#endif //SERVER
+
+
+Byte_t * fetch_bytes( int fd, long offset, int size)
+{
+  Byte_t *data;
+
+  if( lseek( fd, offset, SEEK_SET)==-1){
+    fprintf( FCGI_stdout, "Reason: Target broken (fseek error)\r\n");
+    fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld, %d)\n", fd, offset, size);
+    return NULL;
+  }
+  
+  data = (Byte_t *)malloc( size);
+
+  if( read( fd, data, size) != size){
+    free( data);
+    fprintf( FCGI_stdout, "Reason: Target broken (read error)\r\n");
+    fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld, %d)\n", fd, offset, size);
+    return NULL;
+  }
+  return data;
+}
+
+Byte_t fetch_1byte( int fd, long offset)
+{
+  Byte_t code;
+
+  if( lseek( fd, offset, SEEK_SET)==-1){
+    fprintf( FCGI_stdout, "Reason: Target broken (seek error)\r\n");
+    fprintf( FCGI_stderr, "Error: error in fetch_1byte( %d, %ld)\n", fd, offset);
+    return 0;
+  }
+   
+  if( read( fd, &code, 1) != 1){
+    fprintf( FCGI_stdout, "Reason: Target broken (read error)\r\n");
+    fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld)\n", fd, offset);
+    return 0;
+  }
+  return code;
+}
+
+Byte2_t fetch_2bytebigendian( int fd, long offset)
+{
+  Byte_t *data;
+  Byte2_t code;
+
+  if(!(data = fetch_bytes( fd, offset, 2))){
+    fprintf( FCGI_stderr, "Error: error in fetch_2bytebigendian( %d, %ld)\n", fd, offset);
+    return 0;
+  }
+  code = big2(data);
+  free( data);
+
+  return code;
+}
+
+Byte4_t fetch_4bytebigendian( int fd, long offset)
+{
+  Byte_t *data;
+  Byte4_t code;
+
+  if(!(data = fetch_bytes( fd, offset, 4))){
+    fprintf( FCGI_stderr, "Error: error in fetch_4bytebigendian( %d, %ld)\n", fd, offset);
+    return 0;
+  }
+  code = big4(data);
+  free( data);
+
+  return code;
+}
+
+Byte8_t fetch_8bytebigendian( int fd, long offset)
+{
+  Byte_t *data;
+  Byte8_t code;
+
+  if(!(data = fetch_bytes( fd, offset, 8))){
+    fprintf( FCGI_stderr, "Error: error in fetch_8bytebigendian( %d, %ld)\n", fd, offset);
+    return 0;
+  }
+  code = big8(data);
+  free( data);
+
+  return code;
+}
+
+
+Byte2_t big2( Byte_t *buf)
+{
+  return (((Byte2_t) buf[0]) << 8) + ((Byte2_t) buf[1]);
+}
+
+Byte4_t big4( Byte_t *buf)
+{
+  return (((((((Byte4_t) buf[0]) << 8) + ((Byte4_t) buf[1])) << 8)
+           + ((Byte4_t) buf[2])) << 8) + ((Byte4_t) buf[3]);
+}
+
+Byte8_t big8( Byte_t *buf)
+{
+  return (((Byte8_t) big4 (buf)) << 32)
+        + ((Byte8_t) big4 (buf + 4));
+}