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(retro_file.c) Add USE_BUFFERED_IO

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This commit is contained in:
twinaphex 2015-09-17 21:31:00 +02:00
parent a6458d6ab6
commit 714972bae9
1 changed files with 47 additions and 6 deletions
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53
libretro-common/file/retro_file.c
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@ -38,10 +38,16 @@
#include <fcntl.h>
#endif
#if 0
#define HAVE_BUFFERED_IO 1
#endif
struct RFILE
{
#if defined(PSP) || defined(VITA)
SceUID fd;
#elif defined(HAVE_BUFFERED_IO)
FILE *fd;
#else
int fd;
#endif
@ -59,6 +65,8 @@ RFILE *retro_fopen(const char *path, unsigned mode, ssize_t len)
case RFILE_MODE_READ:
#if defined(VITA) || defined(PSP)
stream->fd = sceIoOpen(path, O_RDONLY, 0777);
#elif defined(HAVE_BUFFERED_IO)
stream->fd = fopen(path, "rb");
#else
stream->fd = open(path, O_RDONLY);
#endif
@ -66,6 +74,8 @@ RFILE *retro_fopen(const char *path, unsigned mode, ssize_t len)
case RFILE_MODE_WRITE:
#if defined(VITA) || defined(PSP)
stream->fd = sceIoOpen(path, O_WRONLY | O_CREAT, 0777);
#elif defined(HAVE_BUFFERED_IO)
stream->fd = fopen(path, "wb");
#else
stream->fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
#endif
@ -73,6 +83,8 @@ RFILE *retro_fopen(const char *path, unsigned mode, ssize_t len)
case RFILE_MODE_READ_WRITE:
#if defined(VITA) || defined(PSP)
stream->fd = sceIoOpen(path, O_RDWR, 0777);
#elif defined(HAVE_BUFFERED_IO)
stream->fd = fopen(path, "w+");
#else
#ifdef _WIN32
stream->fd = open(path, O_RDWR | O_BINARY);
@ -83,7 +95,18 @@ RFILE *retro_fopen(const char *path, unsigned mode, ssize_t len)
break;
}
#if defined(HAVE_BUFFERED_IO)
if (!stream->fd)
#else
if (stream->fd == -1)
#endif
goto error;
return stream;
error:
retro_fclose(stream);
return NULL;
}
ssize_t retro_fseek(RFILE *stream, ssize_t offset, int whence)
@ -93,6 +116,8 @@ ssize_t retro_fseek(RFILE *stream, ssize_t offset, int whence)
#if defined(VITA) || defined(PSP)
return sceIoLseek(stream->fd, (SceOff)offset, whence);
#elif defined(HAVE_BUFFERED_IO)
return fseek(stream->fd, (long)offset, whence);
#else
return lseek(stream->fd, offset, whence);
#endif
@ -104,6 +129,8 @@ ssize_t retro_fread(RFILE *stream, void *s, size_t len)
return -1;
#if defined(VITA) || defined(PSP)
return sceIoRead(stream->fd, s, len);
#elif defined(HAVE_BUFFERED_IO)
return fread(s, len, 1, stream->fd);
#else
return read(stream->fd, s, len);
#endif
@ -115,6 +142,8 @@ ssize_t retro_fwrite(RFILE *stream, const void *s, size_t len)
return -1;
#if defined(VITA) || defined(PSP)
return sceIoWrite(stream->fd, s, len);
#elif defined(HAVE_BUFFERED_IO)
return fwrite(s, len, 1, stream->fd);
#else
return write(stream->fd, s, len);
#endif
@ -126,23 +155,35 @@ void retro_fclose(RFILE *stream)
return;
#if defined(VITA) || defined(PSP)
sceIoClose(stream->fd);
if (stream->fd > 0)
sceIoClose(stream->fd);
#elif defined(HAVE_BUFFERED_IO)
if (stream->fd)
fclose(stream->fd);
#else
close(stream->fd);
if (stream->fd > 0)
close(stream->fd);
#endif
free(stream);
}
static bool retro_fread_iterate(RFILE *stream, char *s, size_t len, ssize_t *bytes_written)
{
*bytes_written = retro_fread(stream, s, len);
#if defined(HAVE_BUFFERED_IO)
return (*bytes_written < 0);
#else
return (*bytes_written < 0 && errno == EINTR);
#endif
}
bool retro_fmemcpy(const char *path, char *s, size_t len, ssize_t *bytes_written)
{
RFILE *stream = retro_fopen(path, RFILE_MODE_READ, -1);
if (!stream)
return false;
do
{
*bytes_written = retro_fread(stream, s, len);
}while(*bytes_written < 0 && errno == EINTR);
while(retro_fread_iterate(stream, s, len, bytes_written));
retro_fclose(stream);
if (*bytes_written < 0)