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authorAutechre2021-09-17 18:06:12 +0200
committerGitHub2021-09-17 18:06:12 +0200
commit5a0ef7339e5eb875fc486c7459ee26b506eaf087 (patch)
tree8b6932a6eb0f786ea8e922701a0182396a80a7cc /libretro-common/vfs
parentf53deef14f98c659fe9bbd7684656ee88977acbd (diff)
parent7d871ab87d45e535d1512a5834b627cbbce2e66c (diff)
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Merge pull request #89 from jdgleaver/vfs-support
Replace direct direct file access with VFS routines
Diffstat (limited to 'libretro-common/vfs')
-rw-r--r--libretro-common/vfs/vfs_implementation.c1335
1 files changed, 1335 insertions, 0 deletions
diff --git a/libretro-common/vfs/vfs_implementation.c b/libretro-common/vfs/vfs_implementation.c
new file mode 100644
index 0000000..7a24a95
--- /dev/null
+++ b/libretro-common/vfs/vfs_implementation.c
@@ -0,0 +1,1335 @@
+/* Copyright (C) 2010-2020 The RetroArch team
+*
+* ---------------------------------------------------------------------------------------
+* The following license statement only applies to this file (vfs_implementation.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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <string/stdstring.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined(_WIN32)
+# ifdef _MSC_VER
+# define setmode _setmode
+# endif
+#include <sys/stat.h>
+# ifdef _XBOX
+# include <xtl.h>
+# define INVALID_FILE_ATTRIBUTES -1
+# else
+
+# include <fcntl.h>
+# include <direct.h>
+# include <windows.h>
+# endif
+# include <io.h>
+#else
+# if defined(PSP)
+# include <pspiofilemgr.h>
+# endif
+# include <sys/types.h>
+# include <sys/stat.h>
+# if !defined(VITA)
+# include <dirent.h>
+# endif
+# include <unistd.h>
+# if defined(ORBIS)
+# include <sys/fcntl.h>
+# include <sys/dirent.h>
+# include <orbisFile.h>
+# endif
+# if defined(WIIU)
+# include <malloc.h>
+# endif
+#endif
+
+#include <fcntl.h>
+
+/* TODO: Some things are duplicated but I'm really afraid of breaking other platforms by touching this */
+#if defined(VITA)
+# include <psp2/io/fcntl.h>
+# include <psp2/io/dirent.h>
+# include <psp2/io/stat.h>
+#elif defined(ORBIS)
+# include <orbisFile.h>
+# include <ps4link.h>
+# include <sys/dirent.h>
+# include <sys/fcntl.h>
+#elif !defined(_WIN32)
+# if defined(PSP)
+# include <pspiofilemgr.h>
+# endif
+# include <sys/types.h>
+# include <sys/stat.h>
+# include <dirent.h>
+# include <unistd.h>
+#endif
+
+#if defined(__QNX__) || defined(PSP)
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+#ifdef __APPLE__
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+#ifdef __HAIKU__
+#include <kernel/image.h>
+#endif
+#ifndef __MACH__
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#endif
+#include <compat/strcasestr.h>
+#include <retro_miscellaneous.h>
+#include <encodings/utf.h>
+
+#if defined(_WIN32)
+#ifndef _XBOX
+#if defined(_MSC_VER) && _MSC_VER <= 1200
+#define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
+#endif
+#endif
+#elif defined(VITA)
+#define SCE_ERROR_ERRNO_EEXIST 0x80010011
+#include <psp2/io/fcntl.h>
+#include <psp2/io/dirent.h>
+#include <psp2/io/stat.h>
+#else
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#endif
+
+#if defined(ORBIS)
+#include <orbisFile.h>
+#include <sys/fcntl.h>
+#include <sys/dirent.h>
+#endif
+#if defined(PSP)
+#include <pspkernel.h>
+#endif
+
+#if defined(__PS3__) || defined(__PSL1GHT__)
+#include <defines/ps3_defines.h>
+#if defined(__PSL1GHT__)
+#include <lv2/sysfs.h>
+#endif
+#endif
+
+#if defined(VITA)
+#define FIO_S_ISDIR SCE_S_ISDIR
+#endif
+
+#if defined(__QNX__) || defined(PSP)
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+/* Assume W-functions do not work below Win2K and Xbox platforms */
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX)
+
+#ifndef LEGACY_WIN32
+#define LEGACY_WIN32
+#endif
+
+#endif
+
+#if defined(_WIN32)
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+#define ATLEAST_VC2005
+#endif
+#endif
+
+#include <vfs/vfs_implementation.h>
+#include <libretro.h>
+#if defined(HAVE_MMAP)
+#include <memmap.h>
+#endif
+#include <encodings/utf.h>
+#include <compat/fopen_utf8.h>
+#include <file/file_path.h>
+
+#ifdef HAVE_CDROM
+#include <vfs/vfs_implementation_cdrom.h>
+#endif
+
+#if (defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) >= 200112) || (defined(__POSIX_VISIBLE) && __POSIX_VISIBLE >= 200112) || (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112) || __USE_LARGEFILE || (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64)
+#ifndef HAVE_64BIT_OFFSETS
+#define HAVE_64BIT_OFFSETS
+#endif
+#endif
+
+#define RFILE_HINT_UNBUFFERED (1 << 8)
+
+int64_t retro_vfs_file_seek_internal(
+ libretro_vfs_implementation_file *stream,
+ int64_t offset, int whence)
+{
+ if (!stream)
+ return -1;
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ return retro_vfs_file_seek_cdrom(stream, offset, whence);
+#endif
+#ifdef ATLEAST_VC2005
+ /* VC2005 and up have a special 64-bit fseek */
+ return _fseeki64(stream->fp, offset, whence);
+#elif defined(ORBIS)
+ {
+ int ret = orbisLseek(stream->fd, offset, whence);
+ if (ret < 0)
+ return -1;
+ return 0;
+ }
+#elif defined(HAVE_64BIT_OFFSETS)
+ return fseeko(stream->fp, (off_t)offset, whence);
+#else
+ return fseek(stream->fp, (long)offset, whence);
+#endif
+ }
+#ifdef HAVE_MMAP
+ /* Need to check stream->mapped because this function is
+ * called in filestream_open() */
+ if (stream->mapped && stream->hints &
+ RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ {
+ /* fseek() returns error on under/overflow but
+ * allows cursor > EOF for
+ read-only file descriptors. */
+ switch (whence)
+ {
+ case SEEK_SET:
+ if (offset < 0)
+ return -1;
+
+ stream->mappos = offset;
+ break;
+
+ case SEEK_CUR:
+ if ( (offset < 0 && stream->mappos + offset > stream->mappos) ||
+ (offset > 0 && stream->mappos + offset < stream->mappos))
+ return -1;
+
+ stream->mappos += offset;
+ break;
+
+ case SEEK_END:
+ if (stream->mapsize + offset < stream->mapsize)
+ return -1;
+
+ stream->mappos = stream->mapsize + offset;
+ break;
+ }
+ return stream->mappos;
+ }
+#endif
+
+ if (lseek(stream->fd, (off_t)offset, whence) < 0)
+ return -1;
+
+ return 0;
+}
+
+/**
+ * retro_vfs_file_open_impl:
+ * @path : path to file
+ * @mode : file mode to use when opening (read/write)
+ * @hints :
+ *
+ * Opens a file for reading or writing, depending on the requested mode.
+ * Returns a pointer to an RFILE if opened successfully, otherwise NULL.
+ **/
+
+libretro_vfs_implementation_file *retro_vfs_file_open_impl(
+ const char *path, unsigned mode, unsigned hints)
+{
+#if defined(VFS_FRONTEND) || defined(HAVE_CDROM)
+ int path_len = (int)strlen(path);
+#endif
+#ifdef VFS_FRONTEND
+ const char *dumb_prefix = "vfsonly://";
+ size_t dumb_prefix_siz = STRLEN_CONST("vfsonly://");
+ int dumb_prefix_len = (int)dumb_prefix_siz;
+#endif
+#ifdef HAVE_CDROM
+ const char *cdrom_prefix = "cdrom://";
+ size_t cdrom_prefix_siz = STRLEN_CONST("cdrom://");
+ int cdrom_prefix_len = (int)cdrom_prefix_siz;
+#endif
+ int flags = 0;
+ const char *mode_str = NULL;
+ libretro_vfs_implementation_file *stream =
+ (libretro_vfs_implementation_file*)
+ malloc(sizeof(*stream));
+
+ if (!stream)
+ return NULL;
+
+ stream->fd = 0;
+ stream->hints = hints;
+ stream->size = 0;
+ stream->buf = NULL;
+ stream->fp = NULL;
+#ifdef _WIN32
+ stream->fh = 0;
+#endif
+ stream->orig_path = NULL;
+ stream->mappos = 0;
+ stream->mapsize = 0;
+ stream->mapped = NULL;
+ stream->scheme = VFS_SCHEME_NONE;
+
+#ifdef VFS_FRONTEND
+ if (path_len >= dumb_prefix_len)
+ if (!memcmp(path, dumb_prefix, dumb_prefix_len))
+ path += dumb_prefix_siz;
+#endif
+
+#ifdef HAVE_CDROM
+ stream->cdrom.cue_buf = NULL;
+ stream->cdrom.cue_len = 0;
+ stream->cdrom.byte_pos = 0;
+ stream->cdrom.drive = 0;
+ stream->cdrom.cur_min = 0;
+ stream->cdrom.cur_sec = 0;
+ stream->cdrom.cur_frame = 0;
+ stream->cdrom.cur_track = 0;
+ stream->cdrom.cur_lba = 0;
+ stream->cdrom.last_frame_lba = 0;
+ stream->cdrom.last_frame[0] = '\0';
+ stream->cdrom.last_frame_valid = false;
+
+ if (path_len > cdrom_prefix_len)
+ {
+ if (!memcmp(path, cdrom_prefix, cdrom_prefix_len))
+ {
+ path += cdrom_prefix_siz;
+ stream->scheme = VFS_SCHEME_CDROM;
+ }
+ }
+#endif
+
+ stream->orig_path = strdup(path);
+
+#ifdef HAVE_MMAP
+ if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS && mode == RETRO_VFS_FILE_ACCESS_READ)
+ stream->hints |= RFILE_HINT_UNBUFFERED;
+ else
+#endif
+ stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
+
+ switch (mode)
+ {
+ case RETRO_VFS_FILE_ACCESS_READ:
+ mode_str = "rb";
+
+ flags = O_RDONLY;
+#ifdef _WIN32
+ flags |= O_BINARY;
+#endif
+ break;
+
+ case RETRO_VFS_FILE_ACCESS_WRITE:
+ mode_str = "wb";
+
+ flags = O_WRONLY | O_CREAT | O_TRUNC;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+ flags |= S_IRUSR | S_IWUSR;
+#else
+ flags |= O_BINARY;
+#endif
+#endif
+ break;
+
+ case RETRO_VFS_FILE_ACCESS_READ_WRITE:
+ mode_str = "w+b";
+ flags = O_RDWR | O_CREAT | O_TRUNC;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+ flags |= S_IRUSR | S_IWUSR;
+#else
+ flags |= O_BINARY;
+#endif
+#endif
+ break;
+
+ case RETRO_VFS_FILE_ACCESS_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
+ case RETRO_VFS_FILE_ACCESS_READ_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
+ mode_str = "r+b";
+
+ flags = O_RDWR;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+ flags |= S_IRUSR | S_IWUSR;
+#else
+ flags |= O_BINARY;
+#endif
+#endif
+ break;
+
+ default:
+ goto error;
+ }
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+#ifdef ORBIS
+ int fd = orbisOpen(path, flags, 0644);
+ if (fd < 0)
+ {
+ stream->fd = -1;
+ goto error;
+ }
+ stream->fd = fd;
+#else
+ FILE *fp;
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ {
+ retro_vfs_file_open_cdrom(stream, path, mode, hints);
+#if defined(_WIN32) && !defined(_XBOX)
+ if (!stream->fh)
+ goto error;
+#else
+ if (!stream->fp)
+ goto error;
+#endif
+ }
+ else
+#endif
+ {
+ fp = (FILE*)fopen_utf8(path, mode_str);
+
+ if (!fp)
+ goto error;
+
+ stream->fp = fp;
+ }
+ /* Regarding setvbuf:
+ *
+ * https://www.freebsd.org/cgi/man.cgi?query=setvbuf&apropos=0&sektion=0&manpath=FreeBSD+11.1-RELEASE&arch=default&format=html
+ *
+ * If the size argument is not zero but buf is NULL,
+ * a buffer of the given size will be allocated immediately, and
+ * released on close. This is an extension to ANSI C.
+ *
+ * Since C89 does not support specifying a NULL buffer
+ * with a non-zero size, we create and track our own buffer for it.
+ */
+ /* TODO: this is only useful for a few platforms,
+ * find which and add ifdef */
+#if defined(_3DS)
+ if (stream->scheme != VFS_SCHEME_CDROM)
+ {
+ stream->buf = (char*)calloc(1, 0x10000);
+ if (stream->fp)
+ setvbuf(stream->fp, stream->buf, _IOFBF, 0x10000);
+ }
+#elif defined(WIIU)
+ if (stream->scheme != VFS_SCHEME_CDROM)
+ {
+ const int bufsize = 128*1024;
+ stream->buf = (char*)memalign(0x40, bufsize);
+ if (stream->fp)
+ setvbuf(stream->fp, stream->buf, _IOFBF, bufsize);
+ }
+#elif !defined(PSP)
+ if (stream->scheme != VFS_SCHEME_CDROM)
+ {
+ stream->buf = (char*)calloc(1, 0x4000);
+ if (stream->fp)
+ setvbuf(stream->fp, stream->buf, _IOFBF, 0x4000);
+ }
+#endif
+#endif
+ }
+ else
+ {
+#if defined(_WIN32) && !defined(_XBOX)
+#if defined(LEGACY_WIN32)
+ char *path_local = utf8_to_local_string_alloc(path);
+ stream->fd = open(path_local, flags, 0);
+ if (path_local)
+ free(path_local);
+#else
+ wchar_t * path_wide = utf8_to_utf16_string_alloc(path);
+ stream->fd = _wopen(path_wide, flags, 0);
+ if (path_wide)
+ free(path_wide);
+#endif
+#else
+ stream->fd = open(path, flags, 0);
+#endif
+
+ if (stream->fd == -1)
+ goto error;
+
+#ifdef HAVE_MMAP
+ if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ {
+ stream->mappos = 0;
+ stream->mapped = NULL;
+ stream->mapsize = retro_vfs_file_seek_internal(stream, 0, SEEK_END);
+
+ if (stream->mapsize == (uint64_t)-1)
+ goto error;
+
+ retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+
+ stream->mapped = (uint8_t*)mmap((void*)0,
+ stream->mapsize, PROT_READ, MAP_SHARED, stream->fd, 0);
+
+ if (stream->mapped == MAP_FAILED)
+ stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
+ }
+#endif
+ }
+#ifdef ORBIS
+ stream->size = orbisLseek(stream->fd, 0, SEEK_END);
+ orbisLseek(stream->fd, 0, SEEK_SET);
+#else
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ {
+ retro_vfs_file_seek_cdrom(stream, 0, SEEK_SET);
+ retro_vfs_file_seek_cdrom(stream, 0, SEEK_END);
+
+ stream->size = retro_vfs_file_tell_impl(stream);
+
+ retro_vfs_file_seek_cdrom(stream, 0, SEEK_SET);
+ }
+ else
+#endif
+ {
+ retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+ retro_vfs_file_seek_internal(stream, 0, SEEK_END);
+
+ stream->size = retro_vfs_file_tell_impl(stream);
+
+ retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+ }
+#endif
+ return stream;
+
+error:
+ retro_vfs_file_close_impl(stream);
+ return NULL;
+}
+
+int retro_vfs_file_close_impl(libretro_vfs_implementation_file *stream)
+{
+ if (!stream)
+ return -1;
+
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ {
+ retro_vfs_file_close_cdrom(stream);
+ goto end;
+ }
+#endif
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+ if (stream->fp)
+ fclose(stream->fp);
+ }
+ else
+ {
+#ifdef HAVE_MMAP
+ if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ munmap(stream->mapped, stream->mapsize);
+#endif
+ }
+
+ if (stream->fd > 0)
+ {
+#ifdef ORBIS
+ orbisClose(stream->fd);
+ stream->fd = -1;
+#else
+ close(stream->fd);
+#endif
+ }
+#ifdef HAVE_CDROM
+end:
+ if (stream->cdrom.cue_buf)
+ free(stream->cdrom.cue_buf);
+#endif
+ if (stream->buf)
+ free(stream->buf);
+
+ if (stream->orig_path)
+ free(stream->orig_path);
+
+ free(stream);
+
+ return 0;
+}
+
+int retro_vfs_file_error_impl(libretro_vfs_implementation_file *stream)
+{
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ return retro_vfs_file_error_cdrom(stream);
+#endif
+#ifdef ORBIS
+ /* TODO/FIXME - implement this? */
+ return 0;
+#else
+ return ferror(stream->fp);
+#endif
+}
+
+int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream)
+{
+ if (stream)
+ return stream->size;
+ return 0;
+}
+
+int64_t retro_vfs_file_truncate_impl(libretro_vfs_implementation_file *stream, int64_t length)
+{
+ if (!stream)
+ return -1;
+
+#ifdef _WIN32
+ if (_chsize(_fileno(stream->fp), length) != 0)
+ return -1;
+#elif !defined(VITA) && !defined(PSP) && !defined(PS2) && !defined(ORBIS) && (!defined(SWITCH) || defined(HAVE_LIBNX))
+ if (ftruncate(fileno(stream->fp), (off_t)length) != 0)
+ return -1;
+#endif
+
+ return 0;
+}
+
+int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream)
+{
+ if (!stream)
+ return -1;
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ return retro_vfs_file_tell_cdrom(stream);
+#endif
+#ifdef ORBIS
+ {
+ int64_t ret = orbisLseek(stream->fd, 0, SEEK_CUR);
+ if (ret < 0)
+ return -1;
+ return ret;
+ }
+#else
+#ifdef ATLEAST_VC2005
+ /* VC2005 and up have a special 64-bit ftell */
+ return _ftelli64(stream->fp);
+#elif defined(HAVE_64BIT_OFFSETS)
+ return ftello(stream->fp);
+#else
+ return ftell(stream->fp);
+#endif
+#endif
+ }
+#ifdef HAVE_MMAP
+ /* Need to check stream->mapped because this function
+ * is called in filestream_open() */
+ if (stream->mapped && stream->hints &
+ RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ return stream->mappos;
+#endif
+ if (lseek(stream->fd, 0, SEEK_CUR) < 0)
+ return -1;
+
+ return 0;
+}
+
+int64_t retro_vfs_file_seek_impl(libretro_vfs_implementation_file *stream,
+ int64_t offset, int seek_position)
+{
+ int whence = -1;
+ switch (seek_position)
+ {
+ case RETRO_VFS_SEEK_POSITION_START:
+ whence = SEEK_SET;
+ break;
+ case RETRO_VFS_SEEK_POSITION_CURRENT:
+ whence = SEEK_CUR;
+ break;
+ case RETRO_VFS_SEEK_POSITION_END:
+ whence = SEEK_END;
+ break;
+ }
+
+ return retro_vfs_file_seek_internal(stream, offset, whence);
+}
+
+int64_t retro_vfs_file_read_impl(libretro_vfs_implementation_file *stream,
+ void *s, uint64_t len)
+{
+ if (!stream || !s)
+ return -1;
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+#ifdef HAVE_CDROM
+ if (stream->scheme == VFS_SCHEME_CDROM)
+ return retro_vfs_file_read_cdrom(stream, s, len);
+#endif
+#ifdef ORBIS
+ if (orbisRead(stream->fd, s, (size_t)len) < 0)
+ return -1;
+ return 0;
+#else
+ return fread(s, 1, (size_t)len, stream->fp);
+#endif
+ }
+#ifdef HAVE_MMAP
+ if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ {
+ if (stream->mappos > stream->mapsize)
+ return -1;
+
+ if (stream->mappos + len > stream->mapsize)
+ len = stream->mapsize - stream->mappos;
+
+ memcpy(s, &stream->mapped[stream->mappos], len);
+ stream->mappos += len;
+
+ return len;
+ }
+#endif
+
+ return read(stream->fd, s, (size_t)len);
+}
+
+int64_t retro_vfs_file_write_impl(libretro_vfs_implementation_file *stream, const void *s, uint64_t len)
+{
+ if (!stream)
+ return -1;
+
+ if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+ {
+#ifdef ORBIS
+ if (orbisWrite(stream->fd, s, (size_t)len) < 0)
+ return -1;
+ return 0;
+#else
+ return fwrite(s, 1, (size_t)len, stream->fp);
+#endif
+ }
+
+#ifdef HAVE_MMAP
+ if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+ return -1;
+#endif
+ return write(stream->fd, s, (size_t)len);
+}
+
+int retro_vfs_file_flush_impl(libretro_vfs_implementation_file *stream)
+{
+ if (!stream)
+ return -1;
+#ifdef ORBIS
+ return 0;
+#else
+ return fflush(stream->fp) == 0 ? 0 : -1;
+#endif
+}
+
+int retro_vfs_file_remove_impl(const char *path)
+{
+#if defined(_WIN32) && !defined(_XBOX)
+ /* Win32 (no Xbox) */
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+ char *path_local = NULL;
+#else
+ wchar_t *path_wide = NULL;
+#endif
+ if (!path || !*path)
+ return -1;
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+ path_local = utf8_to_local_string_alloc(path);
+
+ if (path_local)
+ {
+ int ret = remove(path_local);
+ free(path_local);
+
+ if (ret == 0)
+ return 0;
+ }
+#else
+ path_wide = utf8_to_utf16_string_alloc(path);
+
+ if (path_wide)
+ {
+ int ret = _wremove(path_wide);
+ free(path_wide);
+
+ if (ret == 0)
+ return 0;
+ }
+#endif
+ return -1;
+#elif defined(ORBIS)
+ /* Orbis
+ * TODO/FIXME - stub for now */
+ return 0;
+#else
+ if (remove(path) == 0)
+ return 0;
+ return -1;
+#endif
+}
+
+int retro_vfs_file_rename_impl(const char *old_path, const char *new_path)
+{
+#if defined(_WIN32) && !defined(_XBOX)
+ /* Win32 (no Xbox) */
+ int ret = -1;
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+ char *old_path_local = NULL;
+#else
+ wchar_t *old_path_wide = NULL;
+#endif
+
+ if (!old_path || !*old_path || !new_path || !*new_path)
+ return -1;
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+ old_path_local = utf8_to_local_string_alloc(old_path);
+
+ if (old_path_local)
+ {
+ char *new_path_local = utf8_to_local_string_alloc(new_path);
+
+ if (new_path_local)
+ {
+ if (rename(old_path_local, new_path_local) == 0)
+ ret = 0;
+ free(new_path_local);
+ }
+
+ free(old_path_local);
+ }
+#else
+ old_path_wide = utf8_to_utf16_string_alloc(old_path);
+
+ if (old_path_wide)
+ {
+ wchar_t *new_path_wide = utf8_to_utf16_string_alloc(new_path);
+
+ if (new_path_wide)
+ {
+ if (_wrename(old_path_wide, new_path_wide) == 0)
+ ret = 0;
+ free(new_path_wide);
+ }
+
+ free(old_path_wide);
+ }
+#endif
+ return ret;
+
+#elif defined(ORBIS)
+ /* Orbis */
+ /* TODO/FIXME - Stub for now */
+ if (!old_path || !*old_path || !new_path || !*new_path)
+ return -1;
+ return 0;
+
+#else
+ /* Every other platform */
+ if (!old_path || !*old_path || !new_path || !*new_path)
+ return -1;
+ 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;
+}
+
+int retro_vfs_stat_impl(const char *path, int32_t *size)
+{
+ bool is_dir = false;
+ bool is_character_special = false;
+#if defined(VITA) || defined(PSP)
+ /* Vita / PSP */
+ SceIoStat buf;
+ int dir_ret;
+ char *tmp = NULL;
+ size_t len = 0;
+
+ if (!path || !*path)
+ return 0;
+
+ tmp = strdup(path);
+ len = strlen(tmp);
+ if (tmp[len-1] == '/')
+ tmp[len-1] = '\0';
+
+ dir_ret = sceIoGetstat(tmp, &buf);
+ free(tmp);
+ if (dir_ret < 0)
+ return 0;
+
+ if (size)
+ *size = (int32_t)buf.st_size;
+
+ is_dir = FIO_S_ISDIR(buf.st_mode);
+#elif defined(ORBIS)
+ /* Orbis */
+ int dir_ret = 0;
+
+ if (!path || !*path)
+ return 0;
+
+ if (size)
+ *size = (int32_t)buf.st_size;
+
+ dir_ret = orbisDopen(path);
+ is_dir = dir_ret > 0;
+ orbisDclose(dir_ret);
+
+ is_character_special = S_ISCHR(buf.st_mode);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ /* Lowlevel Lv2 */
+ sysFSStat buf;
+
+ if (!path || !*path)
+ return 0;
+ if (sysFsStat(path, &buf) < 0)
+ return 0;
+
+ if (size)
+ *size = (int32_t)buf.st_size;
+
+ is_dir = ((buf.st_mode & S_IFMT) == S_IFDIR);
+#elif defined(_WIN32)
+ /* Windows */
+ DWORD file_info;
+ struct _stat buf;
+#if defined(LEGACY_WIN32)
+ char *path_local = NULL;
+#else
+ wchar_t *path_wide = NULL;
+#endif
+
+ if (!path || !*path)
+ return 0;
+
+#if defined(LEGACY_WIN32)
+ path_local = utf8_to_local_string_alloc(path);
+ file_info = GetFileAttributes(path_local);
+
+ if (!string_is_empty(path_local))
+ _stat(path_local, &buf);
+
+ if (path_local)
+ free(path_local);
+#else
+ path_wide = utf8_to_utf16_string_alloc(path);
+ file_info = GetFileAttributesW(path_wide);
+
+ _wstat(path_wide, &buf);
+
+ if (path_wide)
+ free(path_wide);
+#endif
+
+ if (file_info == INVALID_FILE_ATTRIBUTES)
+ return 0;
+
+ if (size)
+ *size = (int32_t)buf.st_size;
+
+ is_dir = (file_info & FILE_ATTRIBUTE_DIRECTORY);
+
+#elif defined(GEKKO)
+ /* On GEKKO platforms, paths cannot have
+ * trailing slashes - we must therefore
+ * remove them */
+ char *path_buf = NULL;
+ int stat_ret = -1;
+ struct stat stat_buf;
+ size_t len;
+
+ if (string_is_empty(path))
+ return 0;
+
+ path_buf = strdup(path);
+ if (!path_buf)
+ return 0;
+
+ len = strlen(path_buf);
+ if (len > 0)
+ if (path_buf[len - 1] == '/')
+ path_buf[len - 1] = '\0';
+
+ stat_ret = stat(path_buf, &stat_buf);
+ free(path_buf);
+
+ if (stat_ret < 0)
+ return 0;
+
+ if (size)
+ *size = (int32_t)stat_buf.st_size;
+
+ is_dir = S_ISDIR(stat_buf.st_mode);
+ is_character_special = S_ISCHR(stat_buf.st_mode);
+
+#else
+ /* Every other platform */
+ struct stat buf;
+
+ if (!path || !*path)
+ return 0;
+ if (stat(path, &buf) < 0)
+ return 0;
+
+ if (size)
+ *size = (int32_t)buf.st_size;
+
+ is_dir = S_ISDIR(buf.st_mode);
+ is_character_special = S_ISCHR(buf.st_mode);
+#endif
+ return RETRO_VFS_STAT_IS_VALID | (is_dir ? RETRO_VFS_STAT_IS_DIRECTORY : 0) | (is_character_special ? RETRO_VFS_STAT_IS_CHARACTER_SPECIAL : 0);
+}
+
+#if defined(VITA)
+#define path_mkdir_error(ret) (((ret) == SCE_ERROR_ERRNO_EEXIST))
+#elif defined(PSP) || defined(PS2) || defined(_3DS) || defined(WIIU) || defined(SWITCH) || defined(ORBIS)
+#define path_mkdir_error(ret) ((ret) == -1)
+#else
+#define path_mkdir_error(ret) ((ret) < 0 && errno == EEXIST)
+#endif
+
+int retro_vfs_mkdir_impl(const char *dir)
+{
+#if defined(_WIN32)
+#ifdef LEGACY_WIN32
+ int ret = _mkdir(dir);
+#else
+ wchar_t *dir_w = utf8_to_utf16_string_alloc(dir);
+ int ret = -1;
+
+ if (dir_w)
+ {
+ ret = _wmkdir(dir_w);
+ free(dir_w);
+ }
+#endif
+#elif defined(IOS)
+ int ret = mkdir(dir, 0755);
+#elif defined(VITA) || defined(PSP)
+ int ret = sceIoMkdir(dir, 0777);
+#elif defined(ORBIS)
+ int ret = orbisMkdir(dir, 0755);
+#elif defined(__QNX__)
+ int ret = mkdir(dir, 0777);
+#elif defined(GEKKO)
+ /* On GEKKO platforms, mkdir() fails if
+ * the path has a trailing slash. We must
+ * therefore remove it. */
+ int ret = -1;
+ if (!string_is_empty(dir))
+ {
+ char *dir_buf = strdup(dir);
+
+ if (dir_buf)
+ {
+ size_t len = strlen(dir_buf);
+
+ if (len > 0)
+ if (dir_buf[len - 1] == '/')
+ dir_buf[len - 1] = '\0';
+
+ ret = mkdir(dir_buf, 0750);
+
+ free(dir_buf);
+ }
+ }
+#else
+ int ret = mkdir(dir, 0750);
+#endif
+
+ if (path_mkdir_error(ret))
+ return -2;
+ return ret < 0 ? -1 : 0;
+}
+
+#ifdef VFS_FRONTEND
+struct retro_vfs_dir_handle
+#else
+struct libretro_vfs_implementation_dir
+#endif
+{
+ char* orig_path;
+#if defined(_WIN32)
+#if defined(LEGACY_WIN32)
+ WIN32_FIND_DATA entry;
+#else
+ WIN32_FIND_DATAW entry;
+#endif
+ HANDLE directory;
+ bool next;
+ char path[PATH_MAX_LENGTH];
+#elif defined(VITA) || defined(PSP)
+ SceUID directory;
+ SceIoDirent entry;
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ int error;
+ int directory;
+ sysFSDirent entry;
+#elif defined(ORBIS)
+ int directory;
+ struct dirent entry;
+#else
+ DIR *directory;
+ const struct dirent *entry;
+#endif
+};
+
+static bool dirent_check_error(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+ return (rdir->directory == INVALID_HANDLE_VALUE);
+#elif defined(VITA) || defined(PSP) || defined(ORBIS)
+ return (rdir->directory < 0);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ return (rdir->error != FS_SUCCEEDED);
+#else
+ return !(rdir->directory);
+#endif
+}
+
+libretro_vfs_implementation_dir *retro_vfs_opendir_impl(
+ const char *name, bool include_hidden)
+{
+#if defined(_WIN32)
+ unsigned path_len;
+ char path_buf[1024];
+ size_t copied = 0;
+#if defined(LEGACY_WIN32)
+ char *path_local = NULL;
+#else
+ wchar_t *path_wide = NULL;
+#endif
+#endif
+ libretro_vfs_implementation_dir *rdir;
+
+ /*Reject null or empty string paths*/
+ if (!name || (*name == 0))
+ return NULL;
+
+ /*Allocate RDIR struct. Tidied later with retro_closedir*/
+ rdir = (libretro_vfs_implementation_dir*)calloc(1, sizeof(*rdir));
+ if (!rdir)
+ return NULL;
+
+ rdir->orig_path = strdup(name);
+
+#if defined(_WIN32)
+ path_buf[0] = '\0';
+ path_len = strlen(name);
+
+ copied = strlcpy(path_buf, name, sizeof(path_buf));
+
+ /* Non-NT platforms don't like extra slashes in the path */
+ if (name[path_len - 1] != '\\')
+ path_buf[copied++] = '\\';
+
+ path_buf[copied] = '*';
+ path_buf[copied+1] = '\0';
+
+#if defined(LEGACY_WIN32)
+ path_local = utf8_to_local_string_alloc(path_buf);
+ rdir->directory = FindFirstFile(path_local, &rdir->entry);
+
+ if (path_local)
+ free(path_local);
+#else
+ path_wide = utf8_to_utf16_string_alloc(path_buf);
+ rdir->directory = FindFirstFileW(path_wide, &rdir->entry);
+
+ if (path_wide)
+ free(path_wide);
+#endif
+
+#elif defined(VITA) || defined(PSP)
+ rdir->directory = sceIoDopen(name);
+#elif defined(_3DS)
+ rdir->directory = !string_is_empty(name) ? opendir(name) : NULL;
+ rdir->entry = NULL;
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ rdir->error = sysFsOpendir(name, &rdir->directory);
+#elif defined(ORBIS)
+ rdir->directory = orbisDopen(name);
+#else
+ rdir->directory = opendir(name);
+ rdir->entry = NULL;
+#endif
+
+#ifdef _WIN32
+ if (include_hidden)
+ rdir->entry.dwFileAttributes |= FILE_ATTRIBUTE_HIDDEN;
+ else
+ rdir->entry.dwFileAttributes &= ~FILE_ATTRIBUTE_HIDDEN;
+#endif
+
+ if (rdir->directory && !dirent_check_error(rdir))
+ return rdir;
+
+ retro_vfs_closedir_impl(rdir);
+ return NULL;
+}
+
+bool retro_vfs_readdir_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+ if (rdir->next)
+#if defined(LEGACY_WIN32)
+ return (FindNextFile(rdir->directory, &rdir->entry) != 0);
+#else
+ return (FindNextFileW(rdir->directory, &rdir->entry) != 0);
+#endif
+
+ rdir->next = true;
+ return (rdir->directory != INVALID_HANDLE_VALUE);
+#elif defined(VITA) || defined(PSP)
+ return (sceIoDread(rdir->directory, &rdir->entry) > 0);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ uint64_t nread;
+ rdir->error = sysFsReaddir(rdir->directory, &rdir->entry, &nread);
+ return (nread != 0);
+#elif defined(ORBIS)
+ return (orbisDread(rdir->directory, &rdir->entry) > 0);
+#else
+ return ((rdir->entry = readdir(rdir->directory)) != NULL);
+#endif
+}
+
+const char *retro_vfs_dirent_get_name_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+#if defined(LEGACY_WIN32)
+ char *name = local_to_utf8_string_alloc(rdir->entry.cFileName);
+#else
+ char *name = utf16_to_utf8_string_alloc(rdir->entry.cFileName);
+#endif
+ memset(rdir->entry.cFileName, 0, sizeof(rdir->entry.cFileName));
+ strlcpy((char*)rdir->entry.cFileName, name, sizeof(rdir->entry.cFileName));
+ if (name)
+ free(name);
+ return (char*)rdir->entry.cFileName;
+#elif defined(VITA) || defined(PSP) || defined(ORBIS) || defined(__PSL1GHT__) || defined(__PS3__)
+ return rdir->entry.d_name;
+#else
+ if (!rdir || !rdir->entry)
+ return NULL;
+ return rdir->entry->d_name;
+#endif
+}
+
+bool retro_vfs_dirent_is_dir_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+ const WIN32_FIND_DATA *entry = (const WIN32_FIND_DATA*)&rdir->entry;
+ return entry->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
+#elif defined(PSP) || defined(VITA)
+ const SceIoDirent *entry = (const SceIoDirent*)&rdir->entry;
+#if defined(PSP)
+ return (entry->d_stat.st_attr & FIO_SO_IFDIR) == FIO_SO_IFDIR;
+#elif defined(VITA)
+ return SCE_S_ISDIR(entry->d_stat.st_mode);
+#endif
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ sysFSDirent *entry = (sysFSDirent*)&rdir->entry;
+ return (entry->d_type == FS_TYPE_DIR);
+#elif defined(ORBIS)
+ const struct dirent *entry = &rdir->entry;
+ if (entry->d_type == DT_DIR)
+ return true;
+ if (!(entry->d_type == DT_UNKNOWN || entry->d_type == DT_LNK))
+ return false;
+#else
+ struct stat buf;
+ char path[PATH_MAX_LENGTH];
+#if defined(DT_DIR)
+ const struct dirent *entry = (const struct dirent*)rdir->entry;
+ if (entry->d_type == DT_DIR)
+ return true;
+ /* This can happen on certain file systems. */
+ if (!(entry->d_type == DT_UNKNOWN || entry->d_type == DT_LNK))
+ return false;
+#endif
+ /* dirent struct doesn't have d_type, do it the slow way ... */
+ path[0] = '\0';
+ fill_pathname_join(path, rdir->orig_path, retro_vfs_dirent_get_name_impl(rdir), sizeof(path));
+ if (stat(path, &buf) < 0)
+ return false;
+ return S_ISDIR(buf.st_mode);
+#endif
+}
+
+int retro_vfs_closedir_impl(libretro_vfs_implementation_dir *rdir)
+{
+ if (!rdir)
+ return -1;
+
+#if defined(_WIN32)
+ if (rdir->directory != INVALID_HANDLE_VALUE)
+ FindClose(rdir->directory);
+#elif defined(VITA) || defined(PSP)
+ sceIoDclose(rdir->directory);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+ rdir->error = sysFsClosedir(rdir->directory);
+#elif defined(ORBIS)
+ orbisDclose(rdir->directory);
+#else
+ if (rdir->directory)
+ closedir(rdir->directory);
+#endif
+
+ if (rdir->orig_path)
+ free(rdir->orig_path);
+ free(rdir);
+ return 0;
+}