Implement in-memory source/destination managers even when not emulating the libjpeg v8 API/ABI

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@913 632fc199-4ca6-4c93-a231-07263d6284db

jdatadst.c

@@ -1,9 +1,11 @@
 /*
  * jdatadst.c
  *
+ * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * Modified 2009-2012 by Guido Vollbeding.
- * This file is part of the Independent JPEG Group's software.
+ * Modifications:
+ * Copyright (C) 2013, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README file.
  *
  * This file contains compression data destination routines for the case of
@@ -40,7 +42,7 @@ typedef my_destination_mgr * my_dest_ptr;
 #define OUTPUT_BUF_SIZE  4096	/* choose an efficiently fwrite'able size */
 
 
-#if JPEG_LIB_VERSION >= 80
+#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 /* Expanded data destination object for memory output */
 
 typedef struct {
@@ -76,7 +78,7 @@ init_destination (j_compress_ptr cinfo)
   dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
 }
 
-#if JPEG_LIB_VERSION >= 80
+#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 METHODDEF(void)
 init_mem_destination (j_compress_ptr cinfo)
 {
@@ -123,7 +125,7 @@ empty_output_buffer (j_compress_ptr cinfo)
   return TRUE;
 }
 
-#if JPEG_LIB_VERSION >= 80
+#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 METHODDEF(boolean)
 empty_mem_output_buffer (j_compress_ptr cinfo)
 {
@@ -182,7 +184,7 @@ term_destination (j_compress_ptr cinfo)
     ERREXIT(cinfo, JERR_FILE_WRITE);
 }
 
-#if JPEG_LIB_VERSION >= 80
+#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 METHODDEF(void)
 term_mem_destination (j_compress_ptr cinfo)
 {
@@ -225,7 +227,7 @@ jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
 }
 
 
-#if JPEG_LIB_VERSION >= 80
+#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 /*
  * Prepare for output to a memory buffer.
  * The caller may supply an own initial buffer with appropriate size.