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neo/renderer/jpeg-6/jmemnobs.cpp

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+/*
+ * jmemnobs.c
+ *
+ * Copyright (C) 1992-1994, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file provides a really simple implementation of the system-
+ * dependent portion of the JPEG memory manager.  This implementation
+ * assumes that no backing-store files are needed: all required space
+ * can be obtained from ri.Malloc().
+ * This is very portable in the sense that it'll compile on almost anything,
+ * but you'd better have lots of main memory (or virtual memory) if you want
+ * to process big images.
+ * Note that the max_memory_to_use option is ignored by this implementation.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jmemsys.h"     /* import the system-dependent declarations */
+
+/*
+ * Memory allocation and ri.Freeing are controlled by the regular library
+ * routines ri.Malloc() and ri.Free().
+ */
+
+GLOBAL void *
+jpeg_get_small( j_common_ptr cinfo, size_t sizeofobject ) {
+    return (void *) malloc( sizeofobject );
+}
+
+GLOBAL void
+jpeg_free_small( j_common_ptr cinfo, void * object, size_t sizeofobject ) {
+    free( object );
+}
+
+
+/*
+ * "Large" objects are treated the same as "small" ones.
+ * NB: although we include FAR keywords in the routine declarations,
+ * this file won't actually work in 80x86 small/medium model; at least,
+ * you probably won't be able to process useful-size images in only 64KB.
+ */
+
+GLOBAL void FAR *
+jpeg_get_large( j_common_ptr cinfo, size_t sizeofobject ) {
+    return (void FAR *) malloc( sizeofobject );
+}
+
+GLOBAL void
+jpeg_free_large( j_common_ptr cinfo, void FAR * object, size_t sizeofobject ) {
+    free( object );
+}
+
+
+/*
+ * This routine computes the total memory space available for allocation.
+ * Here we always say, "we got all you want bud!"
+ */
+
+GLOBAL long
+jpeg_mem_available( j_common_ptr cinfo, long min_bytes_needed,
+                    long max_bytes_needed, long already_allocated ) {
+    return max_bytes_needed;
+}
+
+
+/*
+ * Backing store (temporary file) management.
+ * Since jpeg_mem_available always promised the moon,
+ * this should never be called and we can just error out.
+ */
+
+GLOBAL void
+jpeg_open_backing_store( j_common_ptr cinfo, backing_store_ptr info,
+                         long total_bytes_needed ) {
+    ERREXIT( cinfo, JERR_NO_BACKING_STORE );
+}
+
+
+/*
+ * These routines take care of any system-dependent initialization and
+ * cleanup required.  Here, there isn't any.
+ */
+
+GLOBAL long
+jpeg_mem_init( j_common_ptr cinfo ) {
+    return 0;       /* just set max_memory_to_use to 0 */
+}
+
+GLOBAL void
+jpeg_mem_term( j_common_ptr cinfo ) {
+    /* no work */
+}