int cli_chm_open(int fd, const char *dirname, chm_metadata_t *metadata, cli_ctx *ctx)
{
struct stat statbuf;
int retval;
cli_dbgmsg("in cli_chm_open\n");
if ((retval = chm_init_metadata(metadata)) != CL_SUCCESS) {
return retval;
}
if (fstat(fd, &statbuf) == 0) {
if (statbuf.st_size < CHM_ITSF_MIN_LEN) {
return CL_ESTAT;
}
metadata->m_length = statbuf.st_size;
metadata->map = fmap(fd, 0, metadata->m_length);
if (!metadata->map) {
return CL_EMAP;
}
} else {
char err[128];
cli_warnmsg("fstat() failed: %s\n", cli_strerror(errno, err, sizeof(err)));
return CL_ESTAT;
}
if (!itsf_read_header(metadata)) {
goto abort;
}
itsf_print_header(&metadata->itsf_hdr);
if (!itsp_read_header(metadata, metadata->itsf_hdr.dir_offset)) {
goto abort;
}
itsp_print_header(&metadata->itsp_hdr);
metadata->chunk_offset = metadata->itsf_hdr.dir_offset+CHM_ITSP_LEN;
/* TODO: need to check this first calculation,
currently have no files of this type */
if (metadata->itsp_hdr.index_head > 0) {
metadata->chunk_offset += metadata->itsp_hdr.index_head * metadata->itsp_hdr.block_len;
}
metadata->num_chunks = metadata->itsp_hdr.index_tail - metadata->itsp_hdr.index_head + 1;
/* Versions before 3 didn't have a data_offset */
/* TODO: need to check this calculation,
currently have no files of this type */
if (metadata->itsf_hdr.version < 3) {
metadata->itsf_hdr.data_offset = metadata->itsf_hdr.dir_offset + CHM_ITSP_LEN +
(metadata->itsp_hdr.block_len*metadata->itsp_hdr.num_blocks);
}
while (metadata->num_chunks) {
if (read_chunk(metadata) != CL_SUCCESS) {
cli_dbgmsg("read_chunk failed\n");
goto abort;
}
if (read_control_entries(metadata) == FALSE) {
goto abort;
}
metadata->num_chunks--;
metadata->chunk_offset += metadata->itsp_hdr.block_len;
}
if (!metadata->sys_content.length || !metadata->sys_control.length || !metadata->sys_reset.length) {
cli_dbgmsg("sys file missing\n");
goto abort;
}
metadata->ufd = chm_decompress_stream(fd, metadata, dirname, ctx);
if (metadata->ufd == -1) {
goto abort;
}
metadata->chunk_entries = 0;
metadata->chunk_data = NULL;
metadata->chunk_offset = metadata->itsf_hdr.dir_offset+CHM_ITSP_LEN;
metadata->num_chunks = metadata->itsp_hdr.index_tail - metadata->itsp_hdr.index_head + 1;
return CL_SUCCESS;
abort:
funmap(metadata->map);
return CL_EFORMAT;
}
int cli_chm_open(const char *dirname, chm_metadata_t *metadata, cli_ctx *ctx)
{
STATBUF statbuf;
int retval;
cli_dbgmsg("in cli_chm_open\n");
if ((retval = chm_init_metadata(metadata)) != CL_SUCCESS) {
return retval;
}
metadata->map = *ctx->fmap;
if(metadata->map->len < CHM_ITSF_MIN_LEN)
return CL_ESTAT;
metadata->m_length = metadata->map->len;
if (!itsf_read_header(metadata)) {
goto abort;
}
itsf_print_header(&metadata->itsf_hdr);
if (!itsp_read_header(metadata, metadata->itsf_hdr.dir_offset)) {
goto abort;
}
itsp_print_header(&metadata->itsp_hdr);
metadata->chunk_offset = metadata->itsf_hdr.dir_offset+CHM_ITSP_LEN;
/* TODO: need to check this first calculation,
currently have no files of this type */
if (metadata->itsp_hdr.index_head > 0) {
metadata->chunk_offset += metadata->itsp_hdr.index_head * metadata->itsp_hdr.block_len;
}
metadata->num_chunks = metadata->itsp_hdr.index_tail - metadata->itsp_hdr.index_head + 1;
/* Versions before 3 didn't have a data_offset */
/* TODO: need to check this calculation,
currently have no files of this type */
if (metadata->itsf_hdr.version < 3) {
metadata->itsf_hdr.data_offset = metadata->itsf_hdr.dir_offset + CHM_ITSP_LEN +
(metadata->itsp_hdr.block_len*metadata->itsp_hdr.num_blocks);
}
while (metadata->num_chunks) {
if (read_chunk(metadata) != CL_SUCCESS) {
cli_dbgmsg("read_chunk failed\n");
goto abort;
}
if (read_control_entries(metadata) == FALSE) {
goto abort;
}
metadata->num_chunks--;
metadata->chunk_offset += metadata->itsp_hdr.block_len;
}
if (!metadata->sys_content.length || !metadata->sys_control.length || !metadata->sys_reset.length) {
cli_dbgmsg("sys file missing\n");
goto abort;
}
metadata->ufd = chm_decompress_stream(metadata, dirname, ctx);
if (metadata->ufd == -1) {
goto abort;
}
metadata->chunk_entries = 0;
metadata->chunk_data = NULL;
metadata->chunk_offset = metadata->itsf_hdr.dir_offset+CHM_ITSP_LEN;
metadata->num_chunks = metadata->itsp_hdr.index_tail - metadata->itsp_hdr.index_head + 1;
return CL_SUCCESS;
abort:
return CL_EFORMAT;
}
