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work in progress - fio, untar

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hyung-hwan
2022-11-14 23:21:42 +00:00
parent cd8430c589
commit 8f53d6c0fa
15 changed files with 1881 additions and 1652 deletions
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88
lib/tar.c
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@@ -223,25 +223,69 @@ void hio_tar_fini (hio_tar_t* tar)
{
}
static int process_header (hio_tar_t* tar)
{
hio_tar_hdr_t* hdr;
HIO_ASSERT (tar->hio, tar->state == HIO_TAR_STATE_START);
HIO_ASSERT (tar->hio, tar->blk.len == HIO_TAR_BLKSIZE);
hdr = (hio_tar_hdr_t*)tar->blk.buf;
/* all-zero byte block ends the archive */
if (HIO_MEMCMP(hdr, _end_block, HIO_TAR_BLKSIZE) == 0)
{
/* TODO: is it correct? */
tar->state = HIO_TAR_STATE_END;
return 0;
}
else
{
int is_sober;
const hio_bch_t* endptr;
/* if (hdr->typeflag) TODO: do different jobs depending on types... */
tar->hi.filesize = hio_bchars_to_uintmax(hdr->size, HIO_COUNTOF(hdr->size), HIO_BCHARS_TO_UINTMAX_MAKE_OPTION(0,0,0,8), &endptr, &is_sober);
//mode = hio_bchars_to_uintmax(hdr->mode, HIO_COUNTOF(hdr->mode), HIO_BCHARS_TO_UINTMAX_MAKE_OPTION(0,0,0,8), &endptr, &is_sober);
if (tar->hi.filesize > 0)
{
tar->state = HIO_TAR_STATE_FILE;
/* open here? */
/* COMPOSE an actual file name...
hdr->prefix + hdr->name
fp = fopen(hdr->name, "w");
}
else
{
/* empty file? just create an empty file here??? */
/* open ... close or just create */
}
}
return 0;
}
#define hio_tar_endfeed(tar) hio_tar_feed(tar, HIO_NULL, 0)
static int process_content (hio_tar_t* tar)
{
hio_oow_t chunksize;
HIO_ASSERT (tar->hio, tar->blk.len == HIO_TAR_BLKSIZE);
HIO_ASSERT (tar->hio, tar->hi.filesize > 0);
chunksize = tar->hi.filesize < tar->blk.len? tar->hi.filesize: tar->blk.len;
#if 0
write callback(tar->hi.).. tar->blk.buf, tar->blk.len);
#endif
tar->hi.filesize -= chunksize;
if (tar->hi.filesize <= 0)
{
/* end of file */
/* close file??? also close if there is an exception or error??? */
}
}
int hio_tar_feed (hio_tar_t* tar, const void* ptr, hio_oow_t len)
{
@@ -251,34 +295,40 @@ int hio_tar_feed (hio_tar_t* tar, const void* ptr, hio_oow_t len)
if (tar->state != HIO_TAR_STATE_END || tar->blk.len > 0)
{
/* ERROR - premature end of file */
hio_seterrbfmt (tar->hio, HIO_EINVAL, "premature end of feed");
return -1;
}
}
while (len > 0)
{
switch (tar->state)
hio_oow_t cplen;
cplen = HIO_COUNTOF(tar->blk.buf) - tar->blk.len; /* required length to fill a block */
if (len < cplen) cplen = len; /* not enough to fill a block */
HIO_MEMCPY (&tar->blk.buf[tar->blk.len], ptr, cplen);
tar->blk.len += cplen;
len -= cplen;
if (tar->blk.len == HIO_COUNTOF(tar->blk.buf))
{
case HIO_TAR_STATE_START:
/* on a complete block */
switch (tar->state)
{
hio_oow_t cplen;
cplen = HIO_COUNTOF(tar->blk.buf) - tar->blk.len;
if (len < cplen) cplen = len;
HIO_MEMCPY (&tar->blk.buf[tar->blk.len], ptr, cplen);
len -= cplen;
break;
}
case HIO_TAR_STATE_START:
if (process_header(tar) <= -1) return -1;
break;
case HIO_TAR_STATE_FILE:
break;
case HIO_TAR_STATE_FILE:
if (process_content(tar) <= -1) return -1;
break;
case HIO_TAR_STATE_END:
if (len > 0)
{
case HIO_TAR_STATE_END:
/* garbage after the final ending block */
hio_seterrbfmt (tar->hio, HIO_EINVAL, "trailing garbage at the end of feed");
return -1;
}
break;
}
}
}