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author | Nebuleon Fumika | 2013-02-08 05:50:22 -0500 |
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committer | Nebuleon Fumika | 2013-02-08 05:50:22 -0500 |
commit | 927d456306672110870eb3386742c1c1ef8eb4f6 (patch) | |
tree | 509da9ac1727570b02572068aefb9cdf102ad75b /sdk-modifications/libsrc/fs/fatfile_ex.c | |
parent | 433749b6ef1e2b070755c3bb7fc0d81b5ecaa7b1 (diff) | |
parent | d4fcf2697c9a45594e3ee0b8bf82e480ddd0b69b (diff) | |
download | snes9x2005-927d456306672110870eb3386742c1c1ef8eb4f6.tar.gz snes9x2005-927d456306672110870eb3386742c1c1ef8eb4f6.tar.bz2 snes9x2005-927d456306672110870eb3386742c1c1ef8eb4f6.zip |
Merge branch 'master' into 8bitsound
Conflicts:
source/nds/entry.cpp
Diffstat (limited to 'sdk-modifications/libsrc/fs/fatfile_ex.c')
-rwxr-xr-x | sdk-modifications/libsrc/fs/fatfile_ex.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/fs/fatfile_ex.c b/sdk-modifications/libsrc/fs/fatfile_ex.c new file mode 100755 index 0000000..aa23fb3 --- /dev/null +++ b/sdk-modifications/libsrc/fs/fatfile_ex.c @@ -0,0 +1,47 @@ +#include <fcntl.h> +#include <string.h> +#include <errno.h> +#include <ctype.h> +#include <unistd.h> +#include <stdio.h> +#include <iorpg.h> + +#include "cache.h" +#include "file_allocation_table.h" +#include "bit_ops.h" +#include "filetime.h" +#include "fatfile.h"
+ +// origin fread/fwrite do not take advantage of continuous read/write function of SD/NAND, +// it looks like the third parameter to _FAT_read_r()/_FAT_write_r() is a fixed '2' +// so they are much slower than these two.... + +// due to behavior of _FAT_read_r()/_FAT_write_r(), +// FAT should have a at least 8192 cluster size to get better performance, +// 16K or larger cluster size can get the best performance. + + + +int freadex( void * buffer, int _size, int _n, FILE * f ) +{ + if( 0 == _n ) + return 0; + dbg_printf("freadx %d\n", _n ); + struct _reent r; + int ret = _FAT_read_r( &r, (int)f->_file + 8, buffer, _size * _n ); + errno = r._errno; + return ret; +} + + +int fwriteex( const void * buffer, int _size, int _n, FILE * f ) +{ + if( 0 == _n ) + return 0; + dbg_printf("fwritex new %d\n", _n ); + struct _reent r; + int ret = _FAT_write_r( &r, (int)f->_file + 8, buffer, _size * _n ); + errno = r._errno; + return ret; +} + |