SRes MyLzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig)
{
CLzmaEncHandle *p = (CLzmaEncHandle *)LzmaEnc_Create(alloc);
SRes res;
if (p == 0)
return SZ_ERROR_MEM;
res = LzmaEnc_SetProps(p, props);
if (res == SZ_OK)
{
res = LzmaEnc_WriteProperties(p, propsEncoded, propsSize);
if (res == SZ_OK)
res = LzmaEnc_MemEncode(p, dest, destLen, src, srcLen,
writeEndMark, progress, alloc, allocBig);
}
LzmaEnc_Destroy(p, alloc, allocBig);
return res;
}
size32_t compress(const void* input, size32_t inlength, void* output)
{ // returns (size32_t)-1 if cannot compress
if (!enc) {
enc = LzmaEnc_Create(&g_Alloc);
if (enc == 0)
throw MakeStringException(-1,"LzmaEnc_Create failed");
LzmaEncProps_Init(&props);
if (LzmaEnc_SetProps(enc, &props)!=SZ_OK)
throw MakeStringException(-1,"LzmaEnc_SetProps failed");
}
if (inlength+LZMA_PROPS_SIZE+sizeof(size32_t)<1024)
return (size32_t)-1; // don't compress less than 1K
SizeT propsize = LZMA_PROPS_SIZE;
LzmaEnc_WriteProperties(enc, (byte *)output+sizeof(size32_t), &propsize);
*(size32_t *)output = (size32_t)propsize;
SizeT reslen = inlength-1-propsize-sizeof(size32_t);
SRes res = LzmaEnc_MemEncode(enc, (byte *)output+propsize+sizeof(size32_t), &reslen, (const byte *)input, inlength, true, NULL, &g_Alloc, &g_Alloc);
if (res==SZ_ERROR_OUTPUT_EOF)
return (size32_t)-1;
if (res!=SZ_OK)
throw MakeStringException(-1,"LzmaEnc_MemEncode failed(%d)",(int)res);
return reslen+propsize+sizeof(size32_t);
}
STATIC int jffs2_lzma_compress(unsigned char *data_in, unsigned char *cpage_out,
uint32_t *sourcelen, uint32_t *dstlen)
{
SizeT compress_size = (SizeT)(*dstlen);
int ret;
#ifdef __KERNEL__
mutex_lock(&deflate_mutex);
#endif
ret = LzmaEnc_MemEncode(p, cpage_out, &compress_size, data_in, *sourcelen,
0, NULL, &lzma_alloc, &lzma_alloc);
#ifdef __KERNEL__
mutex_unlock(&deflate_mutex);
#endif
if (ret != SZ_OK)
return -1;
*dstlen = (uint32_t)compress_size;
return 0;
}
