66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/*
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* FFI wrappers for `lzma-streams`
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*
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* Copyright (c) 2014, Herbert Valerio Riedel <hvr@gnu.org>
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*
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* This code is BSD3 licensed, see ../LICENSE file for details
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <lzma.h>
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#include <HsFFI.h>
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HsInt
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hs_lzma_init_decoder(lzma_stream *ls, HsBool autolzma, uint64_t memlimit, uint32_t flags)
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{
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/* recommended super-portable initialization */
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const lzma_stream ls_init = LZMA_STREAM_INIT;
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*ls = ls_init;
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const lzma_ret ret = (autolzma ? lzma_auto_decoder : lzma_stream_decoder)(ls, memlimit, flags);
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return ret;
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}
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HsInt
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hs_lzma_init_encoder(lzma_stream *ls, uint32_t preset, HsInt check)
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{
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/* recommended super-portable initialization */
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const lzma_stream ls_init = LZMA_STREAM_INIT;
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*ls = ls_init;
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const lzma_ret ret = lzma_easy_encoder(ls, preset, check);
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return ret;
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}
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void
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hs_lzma_done(lzma_stream *ls)
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{
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lzma_end(ls);
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}
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HsInt
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hs_lzma_run(lzma_stream *const ls, const HsInt action,
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const uint8_t ibuf[], const HsInt ibuf_len,
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uint8_t obuf[], const HsInt obuf_len)
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{
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ls->next_in = ibuf;
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ls->avail_in = ibuf_len;
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ls->next_out = obuf;
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ls->avail_out = obuf_len;
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// paranoia
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memset(obuf, 0, obuf_len);
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const lzma_ret ret = lzma_code(ls, action);
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// paranoia
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ls->next_in = NULL;
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ls->next_out = NULL;
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return ret;
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}
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