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/* vi: set sw=4 ts=4: */
/*
* io_manager.c --- the I/O manager abstraction
*/
#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;
}
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