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Add API for fetching skippable frame content

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This commit is contained in:
Binh Vo
2021-06-14 16:01:28 -04:00
parent 89127e5ee2
commit 9d9f7680f8
3 changed files with 104 additions and 1 deletions
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tests/fuzzer.c
+40
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@@ -1830,6 +1830,46 @@ static int basicUnitTests(U32 const seed, double compressibility)
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize / 2) != 0) goto _output_error;
DISPLAYLEVEL(3, "OK \n");
/* Simple API skippable frame test */
DISPLAYLEVEL(3, "test%3i : read/write a skippable frame : ", testNb++);
{
U32 i;
unsigned readMagic;
unsigned long long receivedSize;
size_t skippableSize;
const U32 skipLen = 129 KB;
char* const skipBuff = (char*)malloc(skipLen);
assert(skipBuff != NULL);
for (i = 0; i < skipLen; i++)
skipBuff[i] = (BYTE) ((seed + i) % 256);
skippableSize = ZSTD_writeSkippableFrame((BYTE*)compressedBuffer, compressedBufferSize,
skipBuff, skipLen, seed % 15);
CHECK_Z(skippableSize);
CHECK_EQ(1, ZSTD_isSkippableFrame(compressedBuffer, skippableSize));
receivedSize = ZSTD_readSkippableFrame(decodedBuffer, CNBuffSize, &readMagic, compressedBuffer, skippableSize);
CHECK_EQ(skippableSize, receivedSize + ZSTD_SKIPPABLEHEADERSIZE);
CHECK_EQ(seed % 15, readMagic);
if (memcmp(decodedBuffer, skipBuff, skipLen) != 0) goto _output_error;
free(skipBuff);
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : read/write an empty skippable frame : ", testNb++);
{
unsigned readMagic;
unsigned long long receivedSize;
size_t skippableSize;
skippableSize = ZSTD_writeSkippableFrame((BYTE*)compressedBuffer, compressedBufferSize,
CNBuffer, 0, seed % 15);
CHECK_EQ(ZSTD_SKIPPABLEHEADERSIZE, skippableSize);
CHECK_EQ(1, ZSTD_isSkippableFrame(compressedBuffer, skippableSize));
receivedSize = ZSTD_readSkippableFrame(NULL, 0, &readMagic, compressedBuffer, skippableSize);
CHECK_EQ(skippableSize, receivedSize + ZSTD_SKIPPABLEHEADERSIZE);
CHECK_EQ(seed % 15, readMagic);
}
DISPLAYLEVEL(3, "OK \n");
/* Dictionary and CCtx Duplication tests */
{ ZSTD_CCtx* const ctxOrig = ZSTD_createCCtx();
ZSTD_CCtx* const ctxDuplicated = ZSTD_createCCtx();