Emulation/libretro-common
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This commit is contained in:
twinaphex 2018-08-07 05:54:23 +02:00
parent 066c9db2c8
commit bd2b5394b1
5 changed files with 43 additions and 0 deletions
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5
include/libretro.h
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@ -1047,6 +1047,10 @@ typedef int (RETRO_CALLCONV *retro_vfs_close_t)(struct retro_vfs_file_handle *st
* Introduced in VFS API v1 */
typedef int64_t (RETRO_CALLCONV *retro_vfs_size_t)(struct retro_vfs_file_handle *stream);
/* Truncate file to specified size. Returns 0 on success or -1 on error
* Introduced in VFS API v2 */
typedef int64_t (RETRO_CALLCONV *retro_vfs_truncate_t)(struct retro_vfs_file_handle *stream, int64_t length);
/* Get the current read / write position for the file. Returns - 1 for error.
* Introduced in VFS API v1 */
typedef int64_t (RETRO_CALLCONV *retro_vfs_tell_t)(struct retro_vfs_file_handle *stream);
@ -1088,6 +1092,7 @@ struct retro_vfs_interface
retro_vfs_flush_t flush;
retro_vfs_remove_t remove;
retro_vfs_rename_t rename;
retro_vfs_truncate_t truncate;
};
struct retro_vfs_interface_info

2
include/streams/file_stream.h
View file

@ -49,6 +49,8 @@ void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info);
int64_t filestream_get_size(RFILE *stream);
int64_t filestream_truncate(RFILE *stream, int64_t length);
/**
* filestream_open:
* @path : path to file

2
include/vfs/vfs_implementation.h
View file

@ -46,6 +46,8 @@ int retro_vfs_file_error_impl(libretro_vfs_implementation_file *stream);
int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream);
int64_t retro_vfs_file_truncate_impl(libretro_vfs_implementation_file *stream, int64_t length);
int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream);
int64_t retro_vfs_file_seek_impl(libretro_vfs_implementation_file *stream, int64_t offset, int seek_position);

18
streams/file_stream.c
View file

@ -41,6 +41,7 @@ static retro_vfs_get_path_t filestream_get_path_cb = NULL;
static retro_vfs_open_t filestream_open_cb = NULL;
static retro_vfs_close_t filestream_close_cb = NULL;
static retro_vfs_size_t filestream_size_cb = NULL;
static retro_vfs_truncate_t filestream_truncate_cb = NULL;
static retro_vfs_tell_t filestream_tell_cb = NULL;
static retro_vfs_seek_t filestream_seek_cb = NULL;
static retro_vfs_read_t filestream_read_cb = NULL;
@ -67,6 +68,7 @@ void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info)
filestream_close_cb = NULL;
filestream_tell_cb = NULL;
filestream_size_cb = NULL;
filestream_truncate_cb = NULL;
filestream_seek_cb = NULL;
filestream_read_cb = NULL;
filestream_write_cb = NULL;
@ -84,6 +86,7 @@ void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info)
filestream_open_cb = vfs_iface->open;
filestream_close_cb = vfs_iface->close;
filestream_size_cb = vfs_iface->size;
filestream_truncate_cb = vfs_iface->truncate;
filestream_tell_cb = vfs_iface->tell;
filestream_seek_cb = vfs_iface->seek;
filestream_read_cb = vfs_iface->read;
@ -127,6 +130,21 @@ int64_t filestream_get_size(RFILE *stream)
return output;
}
int64_t filestream_truncate(RFILE *stream, int64_t length)
{
int64_t output;
if (filestream_truncate_cb != NULL)
output = filestream_truncate_cb(stream->hfile, length);
else
output = retro_vfs_file_truncate_impl((libretro_vfs_implementation_file*)stream->hfile, length);
if (output == vfs_error_return_value)
stream->error_flag = true;
return output;
}
/**
* filestream_open:
* @path : path to file

16
vfs/vfs_implementation.c
View file

@ -380,6 +380,22 @@ int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream)
return stream->size;
}
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;
#else
if(ftruncate(fileno(stream->fp), length) != 0)
return -1;
#endif
return 0;
}
int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream)
{
if (!stream)