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liblzma: Clarify block encoder and decoder documentation. 

Added a few sentences to the description for lzma_block_encoder() and
lzma_block_decoder() to highlight that the Block Header must be coded
before calling these functions.
This commit is contained in:
Jia Tan 2023-02-03 00:20:20 +08:00
parent f680e771b3
commit 54ad83c1ae
1 changed files with 11 additions and 4 deletions
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15
src/liblzma/api/lzma/block.h
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@ -337,7 +337,7 @@ typedef struct {
* Note that if the first byte is 0x00, it indicates beginning of Index; use * Note that if the first byte is 0x00, it indicates beginning of Index; use
* this macro only when the byte is not 0x00. * this macro only when the byte is not 0x00.
* *
* There is no encoding macro, because lzma_block_header_size() and * There is no encoding macro because lzma_block_header_size() and
* lzma_block_header_encode() should be used. * lzma_block_header_encode() should be used.
*/ */
#define lzma_block_header_size_decode(b) (((uint32_t)(b) + 1) * 4) #define lzma_block_header_size_decode(b) (((uint32_t)(b) + 1) * 4)
@ -358,8 +358,7 @@ typedef struct {
* filter chain, consider using lzma_memlimit_encoder() which as * filter chain, consider using lzma_memlimit_encoder() which as
* a side-effect validates the filter chain. * a side-effect validates the filter chain.
* *
* \param block Block options: block->version and block->filters * \param block Block options
* must have been initialized.
* *
* \return Possible lzma_ret values: * \return Possible lzma_ret values:
* - LZMA_OK: Size calculated successfully and stored to * - LZMA_OK: Size calculated successfully and stored to
@ -519,6 +518,10 @@ extern LZMA_API(lzma_vli) lzma_block_total_size(const lzma_block *block)
* Valid actions for lzma_code() are LZMA_RUN, LZMA_SYNC_FLUSH (only if the * Valid actions for lzma_code() are LZMA_RUN, LZMA_SYNC_FLUSH (only if the
* filter chain supports it), and LZMA_FINISH. * filter chain supports it), and LZMA_FINISH.
* *
* The Block encoder encodes the Block Data, Block Padding, and Check value.
* It does NOT encode the Block Header which can be encoded with
* lzma_block_header_encode().
*
* \param strm Pointer to lzma_stream that is at least initialized * \param strm Pointer to lzma_stream that is at least initialized
* with LZMA_STREAM_INIT. * with LZMA_STREAM_INIT.
* \param block Block options: block->version, block->check, * \param block Block options: block->version, block->check,
@ -544,9 +547,13 @@ extern LZMA_API(lzma_ret) lzma_block_encoder(
* Valid actions for lzma_code() are LZMA_RUN and LZMA_FINISH. Using * Valid actions for lzma_code() are LZMA_RUN and LZMA_FINISH. Using
* LZMA_FINISH is not required. It is supported only for convenience. * LZMA_FINISH is not required. It is supported only for convenience.
* *
* The Block decoder decodes the Block Data, Block Padding, and Check value.
* It does NOT decode the Block Header which can be decoded with
* lzma_block_header_decode().
*
* \param strm Pointer to lzma_stream that is at least initialized * \param strm Pointer to lzma_stream that is at least initialized
* with LZMA_STREAM_INIT. * with LZMA_STREAM_INIT.
* \param block Block options. * \param block Block options
* *
* \return Possible lzma_ret values: * \return Possible lzma_ret values:
* - LZMA_OK: All good, continue with lzma_code(). * - LZMA_OK: All good, continue with lzma_code().