mirror of
https://github.com/pbatard/rufus.git
synced 2024-08-14 23:57:05 +00:00
151 lines
3.3 KiB
C
151 lines
3.3 KiB
C
|
/*
|
||
|
* io_manager.c --- the I/O manager abstraction
|
||
|
*/
|
||
|
|
||
|
#include "config.h"
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
#if HAVE_UNISTD_H
|
||
|
#include <unistd.h>
|
||
|
#endif
|
||
|
#include <fcntl.h>
|
||
|
#include <time.h>
|
||
|
#if HAVE_SYS_STAT_H
|
||
|
#include <sys/stat.h>
|
||
|
#endif
|
||
|
#if HAVE_SYS_TYPES_H
|
||
|
#include <sys/types.h>
|
||
|
#endif
|
||
|
|
||
|
#include "ext2_fs.h"
|
||
|
#include "ext2fs.h"
|
||
|
|
||
|
errcode_t io_channel_set_options(io_channel channel, const char *opts)
|
||
|
{
|
||
|
errcode_t retval = 0;
|
||
|
char *next, *ptr, *options, *arg;
|
||
|
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (!opts)
|
||
|
return 0;
|
||
|
|
||
|
if (!channel->manager->set_option)
|
||
|
return EXT2_ET_INVALID_ARGUMENT;
|
||
|
|
||
|
options = malloc(strlen(opts)+1);
|
||
|
if (!options)
|
||
|
return EXT2_ET_NO_MEMORY;
|
||
|
strcpy(options, opts);
|
||
|
ptr = options;
|
||
|
|
||
|
while (ptr && *ptr) {
|
||
|
next = strchr(ptr, '&');
|
||
|
if (next)
|
||
|
*next++ = 0;
|
||
|
|
||
|
arg = strchr(ptr, '=');
|
||
|
if (arg)
|
||
|
*arg++ = 0;
|
||
|
|
||
|
retval = (channel->manager->set_option)(channel, ptr, arg);
|
||
|
if (retval)
|
||
|
break;
|
||
|
ptr = next;
|
||
|
}
|
||
|
free(options);
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_write_byte(io_channel channel, unsigned long offset,
|
||
|
int count, const void *data)
|
||
|
{
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (channel->manager->write_byte)
|
||
|
return channel->manager->write_byte(channel, offset,
|
||
|
count, data);
|
||
|
|
||
|
return EXT2_ET_UNIMPLEMENTED;
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_read_blk64(io_channel channel, unsigned long long block,
|
||
|
int count, void *data)
|
||
|
{
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (channel->manager->read_blk64)
|
||
|
return (channel->manager->read_blk64)(channel, block,
|
||
|
count, data);
|
||
|
|
||
|
if ((block >> 32) != 0)
|
||
|
return EXT2_ET_IO_CHANNEL_NO_SUPPORT_64;
|
||
|
|
||
|
return (channel->manager->read_blk)(channel, (unsigned long) block,
|
||
|
count, data);
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_write_blk64(io_channel channel, unsigned long long block,
|
||
|
int count, const void *data)
|
||
|
{
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (channel->manager->write_blk64)
|
||
|
return (channel->manager->write_blk64)(channel, block,
|
||
|
count, data);
|
||
|
|
||
|
if ((block >> 32) != 0)
|
||
|
return EXT2_ET_IO_CHANNEL_NO_SUPPORT_64;
|
||
|
|
||
|
return (channel->manager->write_blk)(channel, (unsigned long) block,
|
||
|
count, data);
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_discard(io_channel channel, unsigned long long block,
|
||
|
unsigned long long count)
|
||
|
{
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (channel->manager->discard)
|
||
|
return (channel->manager->discard)(channel, block, count);
|
||
|
|
||
|
return EXT2_ET_UNIMPLEMENTED;
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_zeroout(io_channel channel, unsigned long long block,
|
||
|
unsigned long long count)
|
||
|
{
|
||
|
EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
|
||
|
|
||
|
if (channel->manager->zeroout)
|
||
|
return (channel->manager->zeroout)(channel, block, count);
|
||
|
|
||
|
return EXT2_ET_UNIMPLEMENTED;
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_alloc_buf(io_channel io, int count, void *ptr)
|
||
|
{
|
||
|
size_t size;
|
||
|
|
||
|
if (count == 0)
|
||
|
size = io->block_size;
|
||
|
else if (count > 0)
|
||
|
size = io->block_size * count;
|
||
|
else
|
||
|
size = -count;
|
||
|
|
||
|
if (io->align)
|
||
|
return ext2fs_get_memalign(size, io->align, ptr);
|
||
|
else
|
||
|
return ext2fs_get_mem(size, ptr);
|
||
|
}
|
||
|
|
||
|
errcode_t io_channel_cache_readahead(io_channel io, unsigned long long block,
|
||
|
unsigned long long count)
|
||
|
{
|
||
|
if (!io->manager->cache_readahead)
|
||
|
return EXT2_ET_OP_NOT_SUPPORTED;
|
||
|
|
||
|
return io->manager->cache_readahead(io, block, count);
|
||
|
}
|