static void lzmafs_fileop_close(void *ref)
{
lzmafs_file_t *file = (lzmafs_file_t *) ref;
file->lzmafs_fsctx->lzmafsctx_refcnt--;
BDCLOSE(file->lzmafs_fsctx->lzmafsctx_subops,file->lzmafs_subfile);
if (file->lzmafs_inbuf)
KFREE(file->lzmafs_inbuf);
if (file->lzmafs_outbuf)
KFREE(file->lzmafs_outbuf);
if (file->lzmafs_state) {
LzmaDec_Free(file->lzmafs_state, &g_Alloc);
KFREE(file->lzmafs_state);
}
if (file)
KFREE(file);
}
/* *********************************************************************
* fs_close(fsctx,ref)
*
* Close a file on the file system
*
* Input parameters:
* fsctx - filesystem context (from fs_init)
* ref - file handle (from fs_open)
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int fs_close(fileio_ctx_t *fsctx,void *ref)
{
BDCLOSE(fsctx->ops,ref);
return 0;
}
static int lzmafs_fileop_open(void **ref,void *fsctx_arg,char *filename,int mode)
{
lzmafs_fsctx_t *fsctx;
lzmafs_file_t *file;
int err = 0, i;
/* header: 5 bytes of LZMA properties and 8 bytes of uncompressed size */
unsigned char header[LZMA_PROPS_SIZE + 8];
if (mode != FILE_MODE_READ)
return CFE_ERR_UNSUPPORTED;
fsctx = (lzmafs_fsctx_t *) fsctx_arg;
file = KMALLOC(sizeof(lzmafs_file_t), 0);
if (!file) {
return CFE_ERR_NOMEM;
}
file->lzmafs_fileoffset = 0;
file->lzmafs_fsctx = fsctx;
file->lzmafs_inlen = 0;
file->lzmafs_eofseen = 0;
file->lzmafs_state = KMALLOC(sizeof(CLzmaDec), 0);
if (!file->lzmafs_state)
goto error2;
file->lzmafs_outlen = 0;
/* Open the raw file system */
err = BDOPEN(fsctx->lzmafsctx_subops, &(file->lzmafs_subfile),
fsctx->lzmafsctx_subfsctx, filename);
if (err != 0)
goto error2;
err = BDREAD(file->lzmafs_fsctx->lzmafsctx_subops,
file->lzmafs_subfile,
header,
sizeof(header));
if (err < 0)
goto error;
file->lzmafs_unpackSize = 0;
/* uncompressed size */
for (i = 0; i < 8; i++)
file->lzmafs_unpackSize += header[LZMA_PROPS_SIZE + i] << (i * 8);
LzmaDec_Construct(file->lzmafs_state);
RINOK(LzmaDec_Allocate(file->lzmafs_state, header, LZMA_PROPS_SIZE, &g_Alloc));
file->lzmafs_inbuf = KMALLOC(LZMAFS_INBUFSIZE, 0);
file->lzmafs_outbuf = KMALLOC(LZMAFS_OUTBUFSIZE, 0);
if (!file->lzmafs_inbuf || !file->lzmafs_outbuf) {
err = CFE_ERR_NOMEM;
goto error;
}
file->lzmafs_outptr = file->lzmafs_outbuf;
LzmaDec_Init(file->lzmafs_state);
fsctx->lzmafsctx_refcnt++;
*ref = file;
return 0;
error:
BDCLOSE(file->lzmafs_fsctx->lzmafsctx_subops, file->lzmafs_subfile);
error2:
if (file->lzmafs_inbuf)
KFREE(file->lzmafs_inbuf);
if (file->lzmafs_outbuf)
KFREE(file->lzmafs_outbuf);
if (file->lzmafs_state) {
LzmaDec_Free(file->lzmafs_state, &g_Alloc);
KFREE(file->lzmafs_state);
}
if (file)
KFREE(file);
return err;
}
