From: Guido Draheim <guidod@gmx.de>
Date: Wed, 18 Dec 2002 16:34:12 +0000 (+0000)
Subject: This commit was generated by cvs2svn to compensate for changes in r29, which
X-Git-Tag: v0.13.36~80
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b36ef730c05561d70b6480700f7ae9262dbc1eb6;p=zziplib

This commit was generated by cvs2svn to compensate for changes in r29, which
included commits to RCS files with non-trunk default branches.
---

diff --git a/SDL/SDL_rwops_zzip.c b/SDL/SDL_rwops_zzip.c
new file mode 100644
index 0000000..993bc1f
--- /dev/null
+++ b/SDL/SDL_rwops_zzip.c
@@ -0,0 +1,62 @@
+/*
+ *      Copyright (c) 2001 Guido Draheim <guidod@gmx.de>
+ *      Use freely under the restrictions of the ZLIB License
+ *
+ *      (this example uses errno which might not be multithreaded everywhere)
+ */
+
+#include <SDL_rwops_zzip.h>
+#include <zzip/zzip.h>
+#include <string.h> /* strchr */
+
+/* MSVC can not take a casted variable as an lvalue ! */
+#define SDL_RWOPS_ZZIP_DATA(_context) \
+             ((_context)->hidden.unknown.data1)
+#define SDL_RWOPS_ZZIP_FILE(_context)  (ZZIP_FILE*) \
+             ((_context)->hidden.unknown.data1)
+
+static int _zzip_seek(SDL_RWops *context, int offset, int whence)
+{
+    return zzip_seek(SDL_RWOPS_ZZIP_FILE(context), offset, whence);
+}
+
+static int _zzip_read(SDL_RWops *context, void *ptr, int size, int maxnum)
+{
+    return zzip_read(SDL_RWOPS_ZZIP_FILE(context), ptr, size*maxnum);
+}
+
+static int _zzip_write(SDL_RWops *context, const void *ptr, int size, int num)
+{
+    return 0; /* ignored */
+}
+
+static int _zzip_close(SDL_RWops *context)
+{
+    if (! context) return 0; /* may be SDL_RWclose is called by atexit */
+
+    zzip_close (SDL_RWOPS_ZZIP_FILE(context));
+    SDL_FreeRW (context);
+    return 0;
+}
+
+SDL_RWops *SDL_RWFromZZIP(const char* file, const char* mode)
+{
+    register SDL_RWops* rwops;
+    register ZZIP_FILE* zzip_file;
+
+    if (! strchr (mode, 'r'))
+	return SDL_RWFromFile(file, mode);
+
+    zzip_file = zzip_fopen (file, mode);
+    if (! zzip_file) return 0;
+
+    rwops = SDL_AllocRW ();
+    if (! rwops) { errno=ENOMEM; zzip_close (zzip_file); return 0; }
+
+    SDL_RWOPS_ZZIP_DATA(rwops) = zzip_file;
+    rwops->read = _zzip_read;
+    rwops->write = _zzip_write;
+    rwops->seek = _zzip_seek;
+    rwops->close = _zzip_close;
+    return rwops;
+}