Index: libexif/sources/libexif/exif-mem.c |
=================================================================== |
--- libexif/sources/libexif/exif-mem.c (revision 0) |
+++ libexif/sources/libexif/exif-mem.c (revision 0) |
@@ -0,0 +1,119 @@ |
+ /* exif-mem.c |
+ * |
+ * Copyright (c) 2003 Lutz Mueller <lutz@users.sourceforge.net> |
+ * |
+ * This library is free software; you can redistribute it and/or |
+ * modify it under the terms of the GNU Lesser General Public |
+ * License as published by the Free Software Foundation; either |
+ * version 2 of the License, or (at your option) any later version. |
+ * |
+ * This library is distributed in the hope that it will be useful, |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
+ * Lesser General Public License for more details. |
+ * |
+ * You should have received a copy of the GNU Lesser General Public |
+ * License along with this library; if not, write to the |
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
+ * Boston, MA 02110-1301 USA. |
+ */ |
+ |
+#include <libexif/exif-mem.h> |
+ |
+#include <stdlib.h> |
+ |
+struct _ExifMem { |
+ unsigned int ref_count; |
+ ExifMemAllocFunc alloc_func; |
+ ExifMemReallocFunc realloc_func; |
+ ExifMemFreeFunc free_func; |
+}; |
+ |
+/*! Default memory allocation function. */ |
+static void * |
+exif_mem_alloc_func (ExifLong ds) |
+{ |
+ return calloc ((size_t) ds, 1); |
+} |
+ |
+/*! Default memory reallocation function. */ |
+static void * |
+exif_mem_realloc_func (void *d, ExifLong ds) |
+{ |
+ return realloc (d, (size_t) ds); |
+} |
+ |
+/*! Default memory free function. */ |
+static void |
+exif_mem_free_func (void *d) |
+{ |
+ free (d); |
+} |
+ |
+ExifMem * |
+exif_mem_new (ExifMemAllocFunc alloc_func, ExifMemReallocFunc realloc_func, |
+ ExifMemFreeFunc free_func) |
+{ |
+ ExifMem *mem; |
+ |
+ if (!alloc_func && !realloc_func) |
+ return NULL; |
+ mem = alloc_func ? alloc_func (sizeof (ExifMem)) : |
+ realloc_func (NULL, sizeof (ExifMem)); |
+ if (!mem) return NULL; |
+ mem->ref_count = 1; |
+ |
+ mem->alloc_func = alloc_func; |
+ mem->realloc_func = realloc_func; |
+ mem->free_func = free_func; |
+ |
+ return mem; |
+} |
+ |
+void |
+exif_mem_ref (ExifMem *mem) |
+{ |
+ if (!mem) return; |
+ mem->ref_count++; |
+} |
+ |
+void |
+exif_mem_unref (ExifMem *mem) |
+{ |
+ if (!mem) return; |
+ if (!--mem->ref_count) |
+ exif_mem_free (mem, mem); |
+} |
+ |
+void |
+exif_mem_free (ExifMem *mem, void *d) |
+{ |
+ if (!mem) return; |
+ if (mem->free_func) { |
+ mem->free_func (d); |
+ return; |
+ } |
+} |
+ |
+void * |
+exif_mem_alloc (ExifMem *mem, ExifLong ds) |
+{ |
+ if (!mem) return NULL; |
+ if (mem->alloc_func || mem->realloc_func) |
+ return mem->alloc_func ? mem->alloc_func (ds) : |
+ mem->realloc_func (NULL, ds); |
+ return NULL; |
+} |
+ |
+void * |
+exif_mem_realloc (ExifMem *mem, void *d, ExifLong ds) |
+{ |
+ return (mem && mem->realloc_func) ? mem->realloc_func (d, ds) : NULL; |
+} |
+ |
+ExifMem * |
+exif_mem_new_default (void) |
+{ |
+ return exif_mem_new (exif_mem_alloc_func, exif_mem_realloc_func, |
+ exif_mem_free_func); |
+} |
Property changes on: libexif/sources/libexif/exif-mem.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |