Merge from libretro/master:46902e0 for repo synchronization

platform/libretro/libretro-common/streams/file_stream_transforms.c

@@ -0,0 +1,159 @@
+/* Copyright  (C) 2010-2018 The RetroArch team
+*
+* ---------------------------------------------------------------------------------------
+* The following license statement only applies to this file (file_stream_transforms.c).
+* ---------------------------------------------------------------------------------------
+*
+* 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.
+*/
+
+#include <string.h>
+#include <stdarg.h>
+
+#include <libretro.h>
+#include <streams/file_stream.h>
+
+RFILE* rfopen(const char *path, const char *mode)
+{
+   RFILE          *output  = NULL;
+   unsigned int retro_mode = RETRO_VFS_FILE_ACCESS_READ;
+   bool position_to_end    = false;
+
+   if (strstr(mode, "r"))
+   {
+      retro_mode = RETRO_VFS_FILE_ACCESS_READ;
+      if (strstr(mode, "+"))
+      {
+         retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE |
+            RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING;
+      }
+   }
+   else if (strstr(mode, "w"))
+   {
+      retro_mode = RETRO_VFS_FILE_ACCESS_WRITE;
+      if (strstr(mode, "+"))
+         retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE;
+   }
+   else if (strstr(mode, "a"))
+   {
+      retro_mode = RETRO_VFS_FILE_ACCESS_WRITE |
+         RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING;
+      position_to_end = true;
+      if (strstr(mode, "+"))
+      {
+         retro_mode = RETRO_VFS_FILE_ACCESS_READ_WRITE |
+            RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING;
+      }
+   }
+
+   output = filestream_open(path, retro_mode,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+   if (output && position_to_end)
+      filestream_seek(output, 0, RETRO_VFS_SEEK_POSITION_END);
+
+   return output;
+}
+
+int rfclose(RFILE* stream)
+{
+   return filestream_close(stream);
+}
+
+int64_t rftell(RFILE* stream)
+{
+   return filestream_tell(stream);
+}
+
+int64_t rfseek(RFILE* stream, int64_t offset, int origin)
+{
+   int seek_position = -1;
+   switch (origin)
+   {
+      case SEEK_SET:
+         seek_position = RETRO_VFS_SEEK_POSITION_START;
+         break;
+      case SEEK_CUR:
+         seek_position = RETRO_VFS_SEEK_POSITION_CURRENT;
+         break;
+      case SEEK_END:
+         seek_position = RETRO_VFS_SEEK_POSITION_END;
+         break;
+   }
+
+   return filestream_seek(stream, offset, seek_position);
+}
+
+int64_t rfread(void* buffer,
+   size_t elem_size, size_t elem_count, RFILE* stream)
+{
+   return (filestream_read(stream, buffer, elem_size * elem_count) / elem_size);
+}
+
+char *rfgets(char *buffer, int maxCount, RFILE* stream)
+{
+   return filestream_gets(stream, buffer, maxCount);
+}
+
+int rfgetc(RFILE* stream)
+{
+   return filestream_getc(stream);
+}
+
+int64_t rfwrite(void const* buffer,
+   size_t elem_size, size_t elem_count, RFILE* stream)
+{
+   return filestream_write(stream, buffer, elem_size * elem_count);
+}
+
+int rfputc(int character, RFILE * stream)
+{
+    return filestream_putc(stream, character);
+}
+
+int64_t rfflush(RFILE * stream)
+{
+    return filestream_flush(stream);
+}
+
+int rfprintf(RFILE * stream, const char * format, ...)
+{
+   int result;
+   va_list vl;
+   va_start(vl, format);
+   result = filestream_vprintf(stream, format, vl);
+   va_end(vl);
+   return result;
+}
+
+int rferror(RFILE* stream)
+{
+   return filestream_error(stream);
+}
+
+int rfeof(RFILE* stream)
+{
+   return filestream_eof(stream);
+}
+
+int rfscanf(RFILE * stream, const char * format, ...)
+{
+   int result;
+   va_list vl;
+   va_start(vl, format);
+   result = filestream_scanf(stream, format, vl);
+   va_end(vl);
+   return result;
+}