mirror of
https://github.com/libretro/beetle-pce-fast-libretro.git
synced 2024-12-12 10:06:49 +00:00
576 lines
14 KiB
C
576 lines
14 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (vfs_implementation.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if defined(_WIN32)
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# ifdef _MSC_VER
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# define setmode _setmode
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# endif
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# ifdef _XBOX
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# include <xtl.h>
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# define INVALID_FILE_ATTRIBUTES -1
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# else
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# include <io.h>
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# include <fcntl.h>
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# include <direct.h>
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# include <windows.h>
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# endif
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#else
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# if defined(PSP)
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# include <pspiofilemgr.h>
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# endif
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# include <sys/types.h>
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# include <sys/stat.h>
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# if !defined(VITA)
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# include <dirent.h>
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# endif
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# include <unistd.h>
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#endif
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#ifdef __CELLOS_LV2__
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#include <cell/cell_fs.h>
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#define O_RDONLY CELL_FS_O_RDONLY
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#define O_WRONLY CELL_FS_O_WRONLY
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#define O_CREAT CELL_FS_O_CREAT
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#define O_TRUNC CELL_FS_O_TRUNC
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#define O_RDWR CELL_FS_O_RDWR
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#else
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#include <fcntl.h>
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#endif
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/* Assume W-functions do not work below Win2K and Xbox platforms */
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#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX)
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#ifndef LEGACY_WIN32
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#define LEGACY_WIN32
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#endif
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#endif
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#ifdef RARCH_INTERNAL
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#ifndef VFS_FRONTEND
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#define VFS_FRONTEND
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#endif
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#endif
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#include <vfs/vfs_implementation.h>
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#include <libretro.h>
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#include <memmap.h>
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#include <encodings/utf.h>
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#include <compat/fopen_utf8.h>
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#define RFILE_HINT_UNBUFFERED (1 << 8)
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#ifdef VFS_FRONTEND
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struct retro_vfs_file_handle
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#else
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struct libretro_vfs_implementation_file
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#endif
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{
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int fd;
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unsigned hints;
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int64_t size;
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char *buf;
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FILE *fp;
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char* orig_path;
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#if defined(HAVE_MMAP)
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uint64_t mappos;
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uint64_t mapsize;
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uint8_t *mapped;
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#endif
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};
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int64_t retro_vfs_file_seek_internal(libretro_vfs_implementation_file *stream, int64_t offset, int whence)
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{
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if (!stream)
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goto error;
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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return fseek(stream->fp, (long)offset, whence);
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#ifdef HAVE_MMAP
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/* Need to check stream->mapped because this function is
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* called in filestream_open() */
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if (stream->mapped && stream->hints &
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RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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{
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/* fseek() returns error on under/overflow but
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* allows cursor > EOF for
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read-only file descriptors. */
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switch (whence)
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{
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case SEEK_SET:
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if (offset < 0)
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goto error;
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stream->mappos = offset;
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break;
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case SEEK_CUR:
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if ((offset < 0 && stream->mappos + offset > stream->mappos) ||
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(offset > 0 && stream->mappos + offset < stream->mappos))
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goto error;
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stream->mappos += offset;
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break;
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case SEEK_END:
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if (stream->mapsize + offset < stream->mapsize)
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goto error;
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stream->mappos = stream->mapsize + offset;
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break;
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}
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return stream->mappos;
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}
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#endif
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if (lseek(stream->fd, offset, whence) < 0)
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goto error;
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return 0;
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error:
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return -1;
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}
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/**
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* retro_vfs_file_open_impl:
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* @path : path to file
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* @mode : file mode to use when opening (read/write)
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* @hints :
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*
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* Opens a file for reading or writing, depending on the requested mode.
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* Returns a pointer to an RFILE if opened successfully, otherwise NULL.
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**/
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libretro_vfs_implementation_file *retro_vfs_file_open_impl(const char *path, unsigned mode, unsigned hints)
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{
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int flags = 0;
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const char *mode_str = NULL;
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libretro_vfs_implementation_file *stream = (libretro_vfs_implementation_file*)calloc(1, sizeof(*stream));
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#ifdef VFS_FRONTEND
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const char *dumb_prefix = "vfsonly://";
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if (!memcmp(path, dumb_prefix, strlen(dumb_prefix)))
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path += strlen(dumb_prefix);
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#endif
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if (!stream)
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return NULL;
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(void)flags;
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stream->hints = hints;
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stream->orig_path = strdup(path);
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#ifdef HAVE_MMAP
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if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS && mode == RETRO_VFS_FILE_ACCESS_READ)
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stream->hints |= RFILE_HINT_UNBUFFERED;
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else
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#endif
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stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
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switch (mode)
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{
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case RETRO_VFS_FILE_ACCESS_READ:
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mode_str = "rb";
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flags = O_RDONLY;
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#ifdef _WIN32
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flags |= O_BINARY;
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#endif
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break;
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case RETRO_VFS_FILE_ACCESS_WRITE:
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mode_str = "wb";
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flags = O_WRONLY | O_CREAT | O_TRUNC;
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#ifndef _WIN32
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flags |= S_IRUSR | S_IWUSR;
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#else
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flags |= O_BINARY;
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#endif
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break;
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case RETRO_VFS_FILE_ACCESS_READ_WRITE:
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mode_str = "w+b";
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flags = O_RDWR | O_CREAT | O_TRUNC;
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#ifndef _WIN32
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flags |= S_IRUSR | S_IWUSR;
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#else
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flags |= O_BINARY;
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#endif
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break;
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case RETRO_VFS_FILE_ACCESS_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
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case RETRO_VFS_FILE_ACCESS_READ_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
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mode_str = "r+b";
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flags = O_RDWR;
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#ifndef _WIN32
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flags |= S_IRUSR | S_IWUSR;
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#else
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flags |= O_BINARY;
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#endif
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break;
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default:
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goto error;
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}
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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{
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if (!mode_str)
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goto error;
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stream->fp = fopen_utf8(path, mode_str);
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if (!stream->fp)
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goto error;
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/* Regarding setvbuf:
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*
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* https://www.freebsd.org/cgi/man.cgi?query=setvbuf&apropos=0&sektion=0&manpath=FreeBSD+11.1-RELEASE&arch=default&format=html
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*
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* If the size argument is not zero but buf is NULL, a buffer of the given size will be allocated immediately, and
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* released on close. This is an extension to ANSI C.
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*
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* Since C89 does not support specifying a null buffer with a non-zero size, we create and track our own buffer for it.
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*/
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/* TODO: this is only useful for a few platforms, find which and add ifdef */
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stream->buf = (char*)calloc(1, 0x4000);
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setvbuf(stream->fp, stream->buf, _IOFBF, 0x4000);
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}
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else
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{
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#if defined(_WIN32) && !defined(_XBOX)
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#if defined(LEGACY_WIN32)
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char *path_local = utf8_to_local_string_alloc(path);
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stream->fd = open(path_local, flags, 0);
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if (path_local)
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free(path_local);
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#else
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wchar_t * path_wide = utf8_to_utf16_string_alloc(path);
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stream->fd = _wopen(path_wide, flags, 0);
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if (path_wide)
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free(path_wide);
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#endif
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#else
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stream->fd = open(path, flags, 0);
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#endif
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if (stream->fd == -1)
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goto error;
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#ifdef HAVE_MMAP
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if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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{
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stream->mappos = 0;
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stream->mapped = NULL;
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stream->mapsize = retro_vfs_file_seek_internal(stream, 0, SEEK_END);
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if (stream->mapsize == (uint64_t)-1)
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goto error;
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retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
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stream->mapped = (uint8_t*)mmap((void*)0,
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stream->mapsize, PROT_READ, MAP_SHARED, stream->fd, 0);
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if (stream->mapped == MAP_FAILED)
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stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
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}
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#endif
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}
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retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
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retro_vfs_file_seek_internal(stream, 0, SEEK_END);
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stream->size = retro_vfs_file_tell_impl(stream);
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retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
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return stream;
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error:
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retro_vfs_file_close_impl(stream);
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return NULL;
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}
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int retro_vfs_file_close_impl(libretro_vfs_implementation_file *stream)
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{
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if (!stream)
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return -1;
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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{
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if (stream->fp)
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fclose(stream->fp);
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}
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else
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{
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#ifdef HAVE_MMAP
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if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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munmap(stream->mapped, stream->mapsize);
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#endif
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}
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if (stream->fd > 0)
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close(stream->fd);
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if (stream->buf)
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free(stream->buf);
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if (stream->orig_path)
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free(stream->orig_path);
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free(stream);
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return 0;
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}
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int retro_vfs_file_error_impl(libretro_vfs_implementation_file *stream)
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{
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return ferror(stream->fp);
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}
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int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream)
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{
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if (!stream)
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return 0;
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return stream->size;
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}
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int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream)
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{
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if (!stream)
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return -1;
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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return ftell(stream->fp);
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#ifdef HAVE_MMAP
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/* Need to check stream->mapped because this function
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* is called in filestream_open() */
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if (stream->mapped && stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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return stream->mappos;
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#endif
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if (lseek(stream->fd, 0, SEEK_CUR) < 0)
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return -1;
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return 0;
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}
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int64_t retro_vfs_file_seek_impl(libretro_vfs_implementation_file *stream, int64_t offset, int seek_position)
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{
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int whence = -1;
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switch (seek_position)
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{
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case RETRO_VFS_SEEK_POSITION_START:
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whence = SEEK_SET;
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break;
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case RETRO_VFS_SEEK_POSITION_CURRENT:
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whence = SEEK_CUR;
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break;
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case RETRO_VFS_SEEK_POSITION_END:
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whence = SEEK_END;
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break;
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}
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return retro_vfs_file_seek_internal(stream, offset, whence);
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}
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int64_t retro_vfs_file_read_impl(libretro_vfs_implementation_file *stream, void *s, uint64_t len)
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{
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if (!stream || !s)
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goto error;
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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return fread(s, 1, (size_t)len, stream->fp);
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#ifdef HAVE_MMAP
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if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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{
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if (stream->mappos > stream->mapsize)
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goto error;
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if (stream->mappos + len > stream->mapsize)
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len = stream->mapsize - stream->mappos;
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memcpy(s, &stream->mapped[stream->mappos], len);
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stream->mappos += len;
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return len;
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}
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#endif
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return read(stream->fd, s, (size_t)len);
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error:
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return -1;
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}
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int64_t retro_vfs_file_write_impl(libretro_vfs_implementation_file *stream, const void *s, uint64_t len)
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{
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if (!stream)
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goto error;
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if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
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return fwrite(s, 1, (size_t)len, stream->fp);
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#ifdef HAVE_MMAP
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if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
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goto error;
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#endif
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return write(stream->fd, s, (size_t)len);
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error:
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return -1;
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}
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int retro_vfs_file_flush_impl(libretro_vfs_implementation_file *stream)
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{
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if (!stream)
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return -1;
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return fflush(stream->fp)==0 ? 0 : -1;
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}
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int retro_vfs_file_remove_impl(const char *path)
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{
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char *path_local = NULL;
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wchar_t *path_wide = NULL;
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if (!path || !*path)
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return -1;
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(void)path_local;
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(void)path_wide;
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#if defined(_WIN32) && !defined(_XBOX)
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#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
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path_local = utf8_to_local_string_alloc(path);
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if (path_local)
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{
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int ret = remove(path_local);
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free(path_local);
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if (ret == 0)
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return 0;
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}
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#else
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path_wide = utf8_to_utf16_string_alloc(path);
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if (path_wide)
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{
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int ret = _wremove(path_wide);
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free(path_wide);
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if (ret == 0)
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return 0;
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}
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#endif
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#else
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if (remove(path) == 0)
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return 0;
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#endif
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return -1;
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}
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int retro_vfs_file_rename_impl(const char *old_path, const char *new_path)
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{
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char *old_path_local = NULL;
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char *new_path_local = NULL;
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wchar_t *old_path_wide = NULL;
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wchar_t *new_path_wide = NULL;
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if (!old_path || !*old_path || !new_path || !*new_path)
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return -1;
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(void)old_path_local;
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(void)new_path_local;
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(void)old_path_wide;
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(void)new_path_wide;
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#if defined(_WIN32) && !defined(_XBOX)
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#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
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old_path_local = utf8_to_local_string_alloc(old_path);
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new_path_local = utf8_to_local_string_alloc(new_path);
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if (old_path_local)
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{
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if (new_path_local)
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{
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int ret = rename(old_path_local, new_path_local);
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free(old_path_local);
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free(new_path_local);
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return ret==0 ? 0 : -1;
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}
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free(old_path_local);
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}
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|
|
if (new_path_local)
|
|
free(new_path_local);
|
|
#else
|
|
old_path_wide = utf8_to_utf16_string_alloc(old_path);
|
|
new_path_wide = utf8_to_utf16_string_alloc(new_path);
|
|
|
|
if (old_path_wide)
|
|
{
|
|
if (new_path_wide)
|
|
{
|
|
int ret = _wrename(old_path_wide, new_path_wide);
|
|
free(old_path_wide);
|
|
free(new_path_wide);
|
|
return ret==0 ? 0 : -1;
|
|
}
|
|
|
|
free(old_path_wide);
|
|
}
|
|
|
|
if (new_path_wide)
|
|
free(new_path_wide);
|
|
#endif
|
|
return -1;
|
|
#else
|
|
return rename(old_path, new_path)==0 ? 0 : -1;
|
|
#endif
|
|
}
|
|
|
|
const char *retro_vfs_file_get_path_impl(libretro_vfs_implementation_file *stream)
|
|
{
|
|
/* should never happen, do something noisy so caller can be fixed */
|
|
if (!stream)
|
|
abort();
|
|
return stream->orig_path;
|
|
}
|