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liblzma: Rename a variable and improve a comment.

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This commit is contained in:
Lasse Collin 2022-07-14 18:12:38 +03:00
parent 511feb5ead
commit 107c93ee5c
1 changed files with 9 additions and 4 deletions
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13
src/liblzma/lzma/lzma_decoder.c
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@ -348,9 +348,14 @@ lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
lzma_ret ret = LZMA_OK; lzma_ret ret = LZMA_OK;
// This is true when the next LZMA symbol is allowed to be EOPM.
// That is, if this is false, then EOPM is considered
// an invalid symbol and we will return LZMA_DATA_ERROR.
//
// EOPM is always required (not just allowed) when // EOPM is always required (not just allowed) when
// the uncompressed size isn't known. // the uncompressed size isn't known. When uncompressed size
bool eopm_allowed = coder->uncompressed_size == LZMA_VLI_UNKNOWN; // is known, eopm_is_valid may be set to true later.
bool eopm_is_valid = coder->uncompressed_size == LZMA_VLI_UNKNOWN;
// If uncompressed size is known and there is enough output space // If uncompressed size is known and there is enough output space
// to decode all the data, limit the available buffer space so that // to decode all the data, limit the available buffer space so that
@ -397,7 +402,7 @@ lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
// Otherwise continue decoding with the expectation // Otherwise continue decoding with the expectation
// that the next LZMA symbol is EOPM. // that the next LZMA symbol is EOPM.
eopm_allowed = true; eopm_is_valid = true;
} }
rc_if_0(coder->is_match[state][pos_state], SEQ_IS_MATCH) { rc_if_0(coder->is_match[state][pos_state], SEQ_IS_MATCH) {
@ -705,7 +710,7 @@ lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
// that EOPM might be used // that EOPM might be used
// (it's not allowed in // (it's not allowed in
// LZMA2). // LZMA2).
if (!eopm_allowed) { if (!eopm_is_valid) {
ret = LZMA_DATA_ERROR; ret = LZMA_DATA_ERROR;
goto out; goto out;
} }