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new field : ZSTD_frameHeader.frameType

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Makes frame type (zstd,skippable) detection more straighforward.
ZSTD_getFrameHeader set frameContentSize=ZSTD_CONTENTSIZE_UNKNOWN to mean "field not present"
This commit is contained in:
Yann Collet
2017-07-07 15:21:35 -07:00
parent e622330a3b
commit 990449b89d
4 changed files with 57 additions and 51 deletions
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doc/zstd_manual.html
+5 -2
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@@ -344,9 +344,12 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
ZSTD_frameParameters fParams;
} ZSTD_parameters;
</b></pre><BR>
<pre><b>typedef enum { ZSTD_frame, ZSTD_skippableFrame } ZSTD_frameType_e;
</b></pre><BR>
<pre><b>typedef struct {
unsigned long long frameContentSize;
unsigned long long windowSize; </b>/* can be == frameContentSize */<b>
unsigned long long frameContentSize; </b>/* ZSTD_CONTENTSIZE_UNKNOWN means this field is not available. 0 means "empty" */<b>
unsigned long long windowSize; </b>/* can be very large, up to <= frameContentSize */<b>
ZSTD_frameType_e frameType; </b>/* if == ZSTD_skippableFrame, frameContentSize is the size of skippable content */<b>
unsigned dictID;
unsigned checksumFlag;
} ZSTD_frameHeader;