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fixed const guarantees

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read-only objects are properly const-ified in parameters
This commit is contained in:
Yann Collet 2021-03-02 15:24:30 -08:00
parent a80b10f5e6
commit c7e42e147b
2 changed files with 33 additions and 31 deletions
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35
contrib/seekable_format/zstd_seekable.h
View File

@ -108,6 +108,7 @@ ZSTDLIB_API size_t ZSTD_seekable_freeFrameLog(ZSTD_frameLog* fl);
ZSTDLIB_API size_t ZSTD_seekable_logFrame(ZSTD_frameLog* fl, unsigned compressedSize, unsigned decompressedSize, unsigned checksum);
ZSTDLIB_API size_t ZSTD_seekable_writeSeekTable(ZSTD_frameLog* fl, ZSTD_outBuffer* output);
/*-****************************************************************************
* Seekable decompression - HowTo
* A ZSTD_seekable object is required to tracking the seekTable.
@ -155,10 +156,6 @@ ZSTDLIB_API size_t ZSTD_seekable_writeSeekTable(ZSTD_frameLog* fl, ZSTD_outBuffe
ZSTDLIB_API ZSTD_seekable* ZSTD_seekable_create(void);
ZSTDLIB_API size_t ZSTD_seekable_free(ZSTD_seekable* zs);
/*===== Independent seek table management =====*/
ZSTDLIB_API size_t ZSTD_seekable_copySeekTable(ZSTD_seekable* zs, ZSTD_seekTable** out);
ZSTDLIB_API size_t ZSTD_seekTable_free(ZSTD_seekTable* st);
/*===== Seekable decompression functions =====*/
ZSTDLIB_API size_t ZSTD_seekable_initBuff(ZSTD_seekable* zs, const void* src, size_t srcSize);
ZSTDLIB_API size_t ZSTD_seekable_initFile(ZSTD_seekable* zs, FILE* src);
@ -167,20 +164,26 @@ ZSTDLIB_API size_t ZSTD_seekable_decompressFrame(ZSTD_seekable* zs, void* dst, s
#define ZSTD_SEEKABLE_FRAMEINDEX_TOOLARGE (0ULL-2)
/*===== Seekable seek table access functions =====*/
ZSTDLIB_API unsigned ZSTD_seekable_getNumFrames(ZSTD_seekable* const zs);
ZSTDLIB_API unsigned long long ZSTD_seekable_getFrameCompressedOffset(ZSTD_seekable* const zs, unsigned frameIndex);
ZSTDLIB_API unsigned long long ZSTD_seekable_getFrameDecompressedOffset(ZSTD_seekable* const zs, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekable_getFrameCompressedSize(ZSTD_seekable* const zs, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekable_getFrameDecompressedSize(ZSTD_seekable* const zs, unsigned frameIndex);
ZSTDLIB_API unsigned ZSTD_seekable_offsetToFrameIndex(ZSTD_seekable* const zs, unsigned long long offset);
ZSTDLIB_API unsigned ZSTD_seekable_getNumFrames(const ZSTD_seekable* zs);
ZSTDLIB_API unsigned long long ZSTD_seekable_getFrameCompressedOffset(const ZSTD_seekable* zs, unsigned frameIndex);
ZSTDLIB_API unsigned long long ZSTD_seekable_getFrameDecompressedOffset(const ZSTD_seekable* zs, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekable_getFrameCompressedSize(const ZSTD_seekable* zs, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekable_getFrameDecompressedSize(const ZSTD_seekable* zs, unsigned frameIndex);
ZSTDLIB_API unsigned ZSTD_seekable_offsetToFrameIndex(const ZSTD_seekable* zs, unsigned long long offset);
/*===== Independent seek table management =====*/
ZSTDLIB_API size_t ZSTD_seekable_copySeekTable(ZSTD_seekable* zs, ZSTD_seekTable** out);
ZSTDLIB_API size_t ZSTD_seekTable_free(ZSTD_seekTable* st);
/*===== Direct seek table access functions =====*/
ZSTDLIB_API unsigned ZSTD_seekTable_getNumFrames(ZSTD_seekTable* const st);
ZSTDLIB_API unsigned long long ZSTD_seekTable_getFrameCompressedOffset(ZSTD_seekTable* const st, unsigned frameIndex);
ZSTDLIB_API unsigned long long ZSTD_seekTable_getFrameDecompressedOffset(ZSTD_seekTable* const st, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekTable_getFrameCompressedSize(ZSTD_seekTable* const st, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekTable_getFrameDecompressedSize(ZSTD_seekTable* const st, unsigned frameIndex);
ZSTDLIB_API unsigned ZSTD_seekTable_offsetToFrameIndex(ZSTD_seekTable* const st, unsigned long long offset);
ZSTDLIB_API unsigned ZSTD_seekTable_getNumFrames(const ZSTD_seekTable* st);
ZSTDLIB_API unsigned long long ZSTD_seekTable_getFrameCompressedOffset(const ZSTD_seekTable* st, unsigned frameIndex);
ZSTDLIB_API unsigned long long ZSTD_seekTable_getFrameDecompressedOffset(const ZSTD_seekTable* st, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekTable_getFrameCompressedSize(const ZSTD_seekTable* st, unsigned frameIndex);
ZSTDLIB_API size_t ZSTD_seekTable_getFrameDecompressedSize(const ZSTD_seekTable* st, unsigned frameIndex);
ZSTDLIB_API unsigned ZSTD_seekTable_offsetToFrameIndex(const ZSTD_seekTable* st, unsigned long long offset);
/*===== Seekable advanced I/O API =====*/
typedef int(ZSTD_seekable_read)(void* opaque, void* buffer, size_t n);

29
contrib/seekable_format/zstdseek_decompress.c
View File

@ -233,12 +233,12 @@ size_t ZSTD_seekTable_free(ZSTD_seekTable* st)
* Performs a binary search to find the last frame with a decompressed offset
* <= pos
* @return : the frame's index */
unsigned ZSTD_seekable_offsetToFrameIndex(ZSTD_seekable* const zs, unsigned long long pos)
unsigned ZSTD_seekable_offsetToFrameIndex(const ZSTD_seekable* zs, unsigned long long pos)
{
return ZSTD_seekTable_offsetToFrameIndex(&zs->seekTable, pos);
}
unsigned ZSTD_seekTable_offsetToFrameIndex(ZSTD_seekTable* const st, unsigned long long pos)
unsigned ZSTD_seekTable_offsetToFrameIndex(const ZSTD_seekTable* st, unsigned long long pos)
{
U32 lo = 0;
U32 hi = (U32)st->tableLen;
@ -259,57 +259,57 @@ unsigned ZSTD_seekTable_offsetToFrameIndex(ZSTD_seekTable* const st, unsigned lo
return lo;
}
unsigned ZSTD_seekable_getNumFrames(ZSTD_seekable* const zs)
unsigned ZSTD_seekable_getNumFrames(const ZSTD_seekable* zs)
{
return ZSTD_seekTable_getNumFrames(&zs->seekTable);
}
unsigned ZSTD_seekTable_getNumFrames(ZSTD_seekTable* const st)
unsigned ZSTD_seekTable_getNumFrames(const ZSTD_seekTable* st)
{
assert(st->tableLen <= UINT_MAX);
return (unsigned)st->tableLen;
}
unsigned long long ZSTD_seekable_getFrameCompressedOffset(ZSTD_seekable* const zs, unsigned frameIndex)
unsigned long long ZSTD_seekable_getFrameCompressedOffset(const ZSTD_seekable* zs, unsigned frameIndex)
{
return ZSTD_seekTable_getFrameCompressedOffset(&zs->seekTable, frameIndex);
}
unsigned long long ZSTD_seekTable_getFrameCompressedOffset(ZSTD_seekTable* const st, unsigned frameIndex)
unsigned long long ZSTD_seekTable_getFrameCompressedOffset(const ZSTD_seekTable* st, unsigned frameIndex)
{
if (frameIndex >= st->tableLen) return ZSTD_SEEKABLE_FRAMEINDEX_TOOLARGE;
return st->entries[frameIndex].cOffset;
}
unsigned long long ZSTD_seekable_getFrameDecompressedOffset(ZSTD_seekable* const zs, unsigned frameIndex)
unsigned long long ZSTD_seekable_getFrameDecompressedOffset(const ZSTD_seekable* zs, unsigned frameIndex)
{
return ZSTD_seekTable_getFrameDecompressedOffset(&zs->seekTable, frameIndex);
}
unsigned long long ZSTD_seekTable_getFrameDecompressedOffset(ZSTD_seekTable* const st, unsigned frameIndex)
unsigned long long ZSTD_seekTable_getFrameDecompressedOffset(const ZSTD_seekTable* st, unsigned frameIndex)
{
if (frameIndex >= st->tableLen) return ZSTD_SEEKABLE_FRAMEINDEX_TOOLARGE;
return st->entries[frameIndex].dOffset;
}
size_t ZSTD_seekable_getFrameCompressedSize(ZSTD_seekable* const zs, unsigned frameIndex)
size_t ZSTD_seekable_getFrameCompressedSize(const ZSTD_seekable* zs, unsigned frameIndex)
{
return ZSTD_seekTable_getFrameCompressedSize(&zs->seekTable, frameIndex);
}
size_t ZSTD_seekTable_getFrameCompressedSize(ZSTD_seekTable* const st, unsigned frameIndex)
size_t ZSTD_seekTable_getFrameCompressedSize(const ZSTD_seekTable* st, unsigned frameIndex)
{
if (frameIndex >= st->tableLen) return ERROR(frameIndex_tooLarge);
return st->entries[frameIndex + 1].cOffset -
st->entries[frameIndex].cOffset;
}
size_t ZSTD_seekable_getFrameDecompressedSize(ZSTD_seekable* const zs, unsigned frameIndex)
size_t ZSTD_seekable_getFrameDecompressedSize(const ZSTD_seekable* zs, unsigned frameIndex)
{
return ZSTD_seekTable_getFrameDecompressedSize(&zs->seekTable, frameIndex);
}
size_t ZSTD_seekTable_getFrameDecompressedSize(ZSTD_seekTable* const st, unsigned frameIndex)
size_t ZSTD_seekTable_getFrameDecompressedSize(const ZSTD_seekTable* st, unsigned frameIndex)
{
if (frameIndex > st->tableLen) return ERROR(frameIndex_tooLarge);
return st->entries[frameIndex + 1].dOffset -
@ -513,7 +513,7 @@ size_t ZSTD_seekable_decompress(ZSTD_seekable* zs, void* dst, size_t len, unsign
zs->in.size = toRead;
zs->in.pos = 0;
}
}
} /* while (zs->decompressedOffset < offset + len) */
} while (zs->decompressedOffset != offset + len);
return len;
@ -525,8 +525,7 @@ size_t ZSTD_seekable_decompressFrame(ZSTD_seekable* zs, void* dst, size_t dstSiz
return ERROR(frameIndex_tooLarge);
}
{
size_t const decompressedSize =
{ size_t const decompressedSize =
zs->seekTable.entries[frameIndex + 1].dOffset -
zs->seekTable.entries[frameIndex].dOffset;
if (dstSize < decompressedSize) {