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Diffstat (limited to 'src/liblzma/common/code.c')
| -rw-r--r-- | src/liblzma/common/code.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/src/liblzma/common/code.c b/src/liblzma/common/code.c deleted file mode 100644 index 0e3929b6..00000000 --- a/src/liblzma/common/code.c +++ /dev/null @@ -1,203 +0,0 @@ -/////////////////////////////////////////////////////////////////////////////// -// -/// \file code.c -/// \brief zlib-like API wrapper for liblzma's internal API -// -// Copyright (C) 2007 Lasse Collin -// -// This library is free software; you can redistribute it and/or -// modify it under the terms of the GNU Lesser General Public -// License as published by the Free Software Foundation; either -// version 2.1 of the License, or (at your option) any later version. -// -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -// Lesser General Public License for more details. -// -/////////////////////////////////////////////////////////////////////////////// - -#include "common.h" - - -LZMA_API const lzma_stream LZMA_STREAM_INIT_VAR = { - .next_in = NULL, - .avail_in = 0, - .total_in = 0, - .next_out = NULL, - .avail_out = 0, - .total_out = 0, - .allocator = NULL, - .internal = NULL, -}; - - -extern lzma_ret -lzma_strm_init(lzma_stream *strm) -{ - if (strm == NULL) - return LZMA_PROG_ERROR; - - if (strm->internal == NULL) { - strm->internal = lzma_alloc(sizeof(lzma_internal), - strm->allocator); - if (strm->internal == NULL) - return LZMA_MEM_ERROR; - - strm->internal->next = LZMA_NEXT_CODER_INIT; - } - - strm->internal->supported_actions[LZMA_RUN] = false; - strm->internal->supported_actions[LZMA_SYNC_FLUSH] = false; - strm->internal->supported_actions[LZMA_FULL_FLUSH] = false; - strm->internal->supported_actions[LZMA_FINISH] = false; - strm->internal->sequence = ISEQ_RUN; - - strm->total_in = 0; - strm->total_out = 0; - - return LZMA_OK; -} - - -extern LZMA_API lzma_ret -lzma_code(lzma_stream *strm, lzma_action action) -{ - // Sanity checks - if ((strm->next_in == NULL && strm->avail_in != 0) - || (strm->next_out == NULL && strm->avail_out != 0) - || strm->internal == NULL - || strm->internal->next.code == NULL - || (unsigned int)(action) > LZMA_FINISH - || !strm->internal->supported_actions[action]) - return LZMA_PROG_ERROR; - - switch (strm->internal->sequence) { - case ISEQ_RUN: - switch (action) { - case LZMA_RUN: - break; - - case LZMA_SYNC_FLUSH: - strm->internal->sequence = ISEQ_SYNC_FLUSH; - break; - - case LZMA_FULL_FLUSH: - strm->internal->sequence = ISEQ_FULL_FLUSH; - break; - - case LZMA_FINISH: - strm->internal->sequence = ISEQ_FINISH; - break; - } - - break; - - case ISEQ_SYNC_FLUSH: - if (action != LZMA_SYNC_FLUSH) - return LZMA_PROG_ERROR; - - // Check that application doesn't change avail_in once - // LZMA_SYNC_FLUSH has been used. - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - - break; - - case ISEQ_FULL_FLUSH: - if (action != LZMA_FULL_FLUSH) - return LZMA_PROG_ERROR; - - // Check that application doesn't change avail_in once - // LZMA_FULL_FLUSH has been used. - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - - break; - - case ISEQ_FINISH: - if (action != LZMA_FINISH) - return LZMA_PROG_ERROR; - - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - - break; - - case ISEQ_END: - return LZMA_STREAM_END; - - case ISEQ_ERROR: - default: - return LZMA_PROG_ERROR; - } - - size_t in_pos = 0; - size_t out_pos = 0; - lzma_ret ret = strm->internal->next.code( - strm->internal->next.coder, strm->allocator, - strm->next_in, &in_pos, strm->avail_in, - strm->next_out, &out_pos, strm->avail_out, action); - - strm->next_in += in_pos; - strm->avail_in -= in_pos; - strm->total_in += in_pos; - - strm->next_out += out_pos; - strm->avail_out -= out_pos; - strm->total_out += out_pos; - - strm->internal->avail_in = strm->avail_in; - - switch (ret) { - case LZMA_OK: - // Don't return LZMA_BUF_ERROR when it happens the first time. - // This is to avoid returning LZMA_BUF_ERROR when avail_out - // was zero but still there was no more data left to written - // to next_out. - if (out_pos == 0 && in_pos == 0) { - if (strm->internal->allow_buf_error) - ret = LZMA_BUF_ERROR; - else - strm->internal->allow_buf_error = true; - } else { - strm->internal->allow_buf_error = false; - } - break; - - case LZMA_STREAM_END: - if (strm->internal->sequence == ISEQ_SYNC_FLUSH - || strm->internal->sequence == ISEQ_FULL_FLUSH) - strm->internal->sequence = ISEQ_RUN; - else - strm->internal->sequence = ISEQ_END; - break; - - case LZMA_UNSUPPORTED_CHECK: - strm->internal->allow_buf_error = false; - break; - - default: - // All the other errors are fatal; coding cannot be continued. - strm->internal->sequence = ISEQ_ERROR; - break; - } - - return ret; -} - - -extern LZMA_API void -lzma_end(lzma_stream *strm) -{ - if (strm != NULL && strm->internal != NULL) { - if (strm->internal->next.end != NULL) - strm->internal->next.end(strm->internal->next.coder, - strm->allocator); - - lzma_free(strm->internal, strm->allocator); - strm->internal = NULL; - } - - return; -} |