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legacy decoder for v0.7 format

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inikep
2016-07-25 17:49:08 +02:00
parent 2fc3752051
commit fca90f8f60
4 changed files with 5242 additions and 0 deletions
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lib/legacy/zstd_legacy.h
+16
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@@ -48,6 +48,7 @@ extern "C" {
#include "zstd_v04.h"
#include "zstd_v05.h"
#include "zstd_v06.h"
#include "zstd_v07.h"
/** ZSTD_isLegacy() :
@@ -67,6 +68,7 @@ MEM_STATIC unsigned ZSTD_isLegacy(const void* src, size_t srcSize)
case ZSTDv04_magicNumber : return 4;
case ZSTDv05_MAGICNUMBER : return 5;
case ZSTDv06_MAGICNUMBER : return 6;
case ZSTDv07_MAGICNUMBER : return 7;
default : return 0;
}
}
@@ -90,6 +92,12 @@ MEM_STATIC unsigned long long ZSTD_getDecompressedSize_legacy(const void* src, s
if (frResult != 0) return 0;
return fParams.frameContentSize;
}
if (version==7) {
ZSTDv07_frameParams fParams;
size_t const frResult = ZSTDv07_getFrameParams(&fParams, src, srcSize);
if (frResult != 0) return 0;
return fParams.frameContentSize;
}
return 0; /* should not be possible */
}
}
@@ -126,6 +134,14 @@ MEM_STATIC size_t ZSTD_decompressLegacy(
ZSTDv06_freeDCtx(zd);
return result;
}
case 7 :
{ size_t result;
ZSTDv07_DCtx* const zd = ZSTDv07_createDCtx();
if (zd==NULL) return ERROR(memory_allocation);
result = ZSTDv07_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize);
ZSTDv07_freeDCtx(zd);
return result;
}
default :
return ERROR(prefix_unknown);
}