CfgUSBLoader/lib/libext2fs/source/ext2_frag.c
2015-01-17 10:11:08 +00:00

61 lines
1.5 KiB
C

#include "ext2_internal.h"
#include "ext2_frag.h"
typedef struct _PrivData
{
_ext2_frag_append_t append_fragment;
void * callback_data;
} PrivDataST;
static int block_iter_callback(ext2_filsys fs, blk64_t *blocknr, e2_blkcnt_t blockcnt, blk64_t ref_block, int ref_offset, void *privateData)
{
PrivDataST *priv = (PrivDataST *) privateData;
blk64_t block;
block = *blocknr;
return priv->append_fragment(priv->callback_data, blockcnt*fs->io->block_size/512, block*fs->io->block_size/512, fs->io->block_size/512);
}
int _EXT2_get_fragments(const char *in_path, _ext2_frag_append_t append_fragment, void *callback_data)
{
ext2_inode_t *ni = NULL;
ext2_vd *vd;
vd = ext2GetVolume(in_path);
if(!vd)
{
errno = EXDEV;
return -1;
}
// Get the actual path of the entry
const char * path = ext2RealPath(in_path);
if (!path) {
errno = EINVAL;
return -1;
}
// Find the entry
ni = ext2OpenEntry(vd, path);
if (!ni) {
errno = ENOENT;
return -1;
}
PrivDataST priv;
priv.callback_data = callback_data;
priv.append_fragment = append_fragment;
int ret = ext2fs_block_iterate3(vd->fs, ni->ino, BLOCK_FLAG_DATA_ONLY, NULL, block_iter_callback, &priv);
if(ret == 0)
ret = priv.append_fragment(callback_data, EXT2_I_SIZE(&ni->ni) >> 9, 0, 0);
ext2UpdateTimes(vd, ni, EXT2_UPDATE_ATIME);
ext2CloseEntry(vd, ni);
return ret;
}