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/*
* io_manager.c --- the I/O manager abstraction
*/
#include <common.h>
//#include <ext_common.h>
//#include <ext4fs.h>
#include <malloc.h>
#include <stddef.h>
#include <linux/stat.h>
#include <linux/time.h>
#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);
}
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