(libretro-common) Start adding retro_file.c and retro_file.h

Makefile.common

@@ -131,6 +131,7 @@ OBJ += frontend/frontend.o \
 		libretro-common/file/file_list.o \
 		libretro-common/file/dir_list.o \
 		libretro-common/file/retro_dirent.o \
+		libretro-common/file/retro_file.o \
 		libretro-common/string/string_list.o \
 		libretro-common/string/stdstring.o \
 		libretro-common/memmap/memalign.o \

griffin/griffin.c

@@ -578,6 +578,7 @@ FILE
 #include "../libretro-common/file/dir_list.c"
 #endif
 #include "../libretro-common/file/retro_dirent.c"
+#include "../libretro-common/file/retro_file.c"
 #include "../dir_list_special.c"
 #include "../libretro-common/string/string_list.c"
 #include "../libretro-common/string/stdstring.c"

libretro-common/file/retro_file.c

@@ -0,0 +1,109 @@
+#include <retro_file.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(_WIN32)
+#  include <compat/posix_string.h>
+#  ifdef _MSC_VER
+#    define setmode _setmode
+#  endif
+#  ifdef _XBOX
+#    include <xtl.h>
+#    define INVALID_FILE_ATTRIBUTES -1
+#  else
+#    include <io.h>
+#    include <fcntl.h>
+#    include <direct.h>
+#    include <windows.h>
+#  endif
+#elif defined(VITA)
+#  include <psp2/io/fcntl.h>
+#  include <psp2/io/dirent.h>
+#else
+#  if defined(PSP)
+#    include <pspiofilemgr.h>
+#  endif
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  include <dirent.h>
+#  include <unistd.h>
+#endif
+
+#ifdef __CELLOS_LV2__
+#include <cell/cell_fs.h>
+#else
+#include <fcntl.h>
+#endif
+
+struct RFILE
+{
+   int fd;
+};
+
+enum
+{
+   MODE_READ = 0,
+   MODE_WRITE,
+   MODE_READ_WRITE,
+};
+
+struct RFILE *retro_fopen(const char *path, const char *mode, size_t len)
+{
+   int flags = 0;
+   struct RFILE *stream = (struct RFILE*)calloc(1, sizeof(*stream));
+
+   if (!stream)
+      return NULL;
+
+   if (!strcmp(mode, "w+"))
+      flags = MODE_READ_WRITE;
+
+   switch (flags)
+   {
+      case MODE_READ:
+         break;
+      case MODE_WRITE:
+         break;
+      case MODE_READ_WRITE:
+#ifdef _WIN32
+         stream->fd = open(path, O_RDWR | O_BINARY);
+#else
+         stream->fd = open(path, O_RDWR);
+#endif
+         break;
+   }
+
+   return stream;
+}
+
+ssize_t retro_seek(struct RFILE *stream, ssize_t offset, int whence)
+{
+   if (!stream)
+      return -1;
+
+   return lseek(stream->fd, offset, whence);
+}
+
+ssize_t retro_read(struct RFILE *stream, void *s, size_t len)
+{
+   if (!stream)
+      return -1;
+   return read(stream->fd, s, len);
+}
+
+ssize_t retro_write(struct RFILE *stream, const void *s, size_t len)
+{
+   if (!stream)
+      return -1;
+   return write(stream->fd, s, len);
+}
+
+void retro_fclose(struct RFILE *stream)
+{
+   if (!stream)
+      return;
+
+   free(stream);
+}

libretro-common/include/retro_file.h

@@ -0,0 +1,51 @@
+/* Copyright  (C) 2010-2015 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_file.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __RETRO_FILE_H
+#define __RETRO_FILE_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct RFILE;
+
+struct RFILE *retro_fopen(const char *path, const char *mode, size_t len);
+
+ssize_t retro_seek(struct RFILE *stream, ssize_t offset, int whence);
+
+ssize_t retro_read(struct RFILE *stream, void *s, size_t len);
+
+ssize_t retro_write(struct RFILE *stream, const void *s, size_t len);
+
+void retro_fclose(struct RFILE *stream);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif