Merge pull request #3595 from facebook/dev
v1.5.5 last changes
diff --git a/README.md b/README.md
index 9a9202a..f91e68f 100644
--- a/README.md
+++ b/README.md
@@ -13,15 +13,12 @@
**Development branch status:**
[![Build Status][travisDevBadge]][travisLink]
-[![Build status][AppveyorDevBadge]][AppveyorLink]
[![Build status][CircleDevBadge]][CircleLink]
[![Build status][CirrusDevBadge]][CirrusLink]
[![Fuzzing Status][OSSFuzzBadge]][OSSFuzzLink]
[travisDevBadge]: https://api.travis-ci.com/facebook/zstd.svg?branch=dev "Continuous Integration test suite"
[travisLink]: https://travis-ci.com/facebook/zstd
-[AppveyorDevBadge]: https://ci.appveyor.com/api/projects/status/xt38wbdxjk5mrbem/branch/dev?svg=true "Windows test suite"
-[AppveyorLink]: https://ci.appveyor.com/project/YannCollet/zstd-p0yf0
[CircleDevBadge]: https://circleci.com/gh/facebook/zstd/tree/dev.svg?style=shield "Short test suite"
[CircleLink]: https://circleci.com/gh/facebook/zstd
[CirrusDevBadge]: https://api.cirrus-ci.com/github/facebook/zstd.svg?branch=dev
@@ -156,13 +153,13 @@
#### Support for Fat (Universal2) Output
-`zstd` can be built and installed with support for both Apple Silicon (M1/M2) as well as Intel by using CMake's Universal2 support.
+`zstd` can be built and installed with support for both Apple Silicon (M1/M2) as well as Intel by using CMake's Universal2 support.
To perform a Fat/Universal2 build and install use the following commands:
```bash
cmake -B build-cmake-debug -S build/cmake -G Ninja -DCMAKE_OSX_ARCHITECTURES="x86_64;x86_64h;arm64"
cd build-cmake-debug
-ninja
+ninja
sudo ninja install
```
diff --git a/lib/decompress/zstd_decompress.c b/lib/decompress/zstd_decompress.c
index 3f3ca57..7bc2713 100644
--- a/lib/decompress/zstd_decompress.c
+++ b/lib/decompress/zstd_decompress.c
@@ -589,49 +589,52 @@
sizeU32 = MEM_readLE32((BYTE const*)src + ZSTD_FRAMEIDSIZE);
RETURN_ERROR_IF((U32)(sizeU32 + ZSTD_SKIPPABLEHEADERSIZE) < sizeU32,
frameParameter_unsupported, "");
- {
- size_t const skippableSize = skippableHeaderSize + sizeU32;
+ { size_t const skippableSize = skippableHeaderSize + sizeU32;
RETURN_ERROR_IF(skippableSize > srcSize, srcSize_wrong, "");
return skippableSize;
}
}
/*! ZSTD_readSkippableFrame() :
- * Retrieves a zstd skippable frame containing data given by src, and writes it to dst buffer.
+ * Retrieves content of a skippable frame, and writes it to dst buffer.
*
* The parameter magicVariant will receive the magicVariant that was supplied when the frame was written,
* i.e. magicNumber - ZSTD_MAGIC_SKIPPABLE_START. This can be NULL if the caller is not interested
* in the magicVariant.
*
- * Returns an error if destination buffer is not large enough, or if the frame is not skippable.
+ * Returns an error if destination buffer is not large enough, or if this is not a valid skippable frame.
*
* @return : number of bytes written or a ZSTD error.
*/
-ZSTDLIB_API size_t ZSTD_readSkippableFrame(void* dst, size_t dstCapacity, unsigned* magicVariant,
- const void* src, size_t srcSize)
+size_t ZSTD_readSkippableFrame(void* dst, size_t dstCapacity,
+ unsigned* magicVariant, /* optional, can be NULL */
+ const void* src, size_t srcSize)
{
- U32 const magicNumber = MEM_readLE32(src);
- size_t skippableFrameSize = readSkippableFrameSize(src, srcSize);
- size_t skippableContentSize = skippableFrameSize - ZSTD_SKIPPABLEHEADERSIZE;
+ RETURN_ERROR_IF(srcSize < ZSTD_SKIPPABLEHEADERSIZE, srcSize_wrong, "");
- /* check input validity */
- RETURN_ERROR_IF(!ZSTD_isSkippableFrame(src, srcSize), frameParameter_unsupported, "");
- RETURN_ERROR_IF(skippableFrameSize < ZSTD_SKIPPABLEHEADERSIZE || skippableFrameSize > srcSize, srcSize_wrong, "");
- RETURN_ERROR_IF(skippableContentSize > dstCapacity, dstSize_tooSmall, "");
+ { U32 const magicNumber = MEM_readLE32(src);
+ size_t skippableFrameSize = readSkippableFrameSize(src, srcSize);
+ size_t skippableContentSize = skippableFrameSize - ZSTD_SKIPPABLEHEADERSIZE;
- /* deliver payload */
- if (skippableContentSize > 0 && dst != NULL)
- ZSTD_memcpy(dst, (const BYTE *)src + ZSTD_SKIPPABLEHEADERSIZE, skippableContentSize);
- if (magicVariant != NULL)
- *magicVariant = magicNumber - ZSTD_MAGIC_SKIPPABLE_START;
- return skippableContentSize;
+ /* check input validity */
+ RETURN_ERROR_IF(!ZSTD_isSkippableFrame(src, srcSize), frameParameter_unsupported, "");
+ RETURN_ERROR_IF(skippableFrameSize < ZSTD_SKIPPABLEHEADERSIZE || skippableFrameSize > srcSize, srcSize_wrong, "");
+ RETURN_ERROR_IF(skippableContentSize > dstCapacity, dstSize_tooSmall, "");
+
+ /* deliver payload */
+ if (skippableContentSize > 0 && dst != NULL)
+ ZSTD_memcpy(dst, (const BYTE *)src + ZSTD_SKIPPABLEHEADERSIZE, skippableContentSize);
+ if (magicVariant != NULL)
+ *magicVariant = magicNumber - ZSTD_MAGIC_SKIPPABLE_START;
+ return skippableContentSize;
+ }
}
/** ZSTD_findDecompressedSize() :
- * compatible with legacy mode
* `srcSize` must be the exact length of some number of ZSTD compressed and/or
* skippable frames
- * @return : decompressed size of the frames contained */
+ * note: compatible with legacy mode
+ * @return : decompressed size of the frames contained */
unsigned long long ZSTD_findDecompressedSize(const void* src, size_t srcSize)
{
unsigned long long totalDstSize = 0;
@@ -641,9 +644,7 @@
if ((magicNumber & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) {
size_t const skippableSize = readSkippableFrameSize(src, srcSize);
- if (ZSTD_isError(skippableSize)) {
- return ZSTD_CONTENTSIZE_ERROR;
- }
+ if (ZSTD_isError(skippableSize)) return ZSTD_CONTENTSIZE_ERROR;
assert(skippableSize <= srcSize);
src = (const BYTE *)src + skippableSize;
@@ -651,17 +652,17 @@
continue;
}
- { unsigned long long const ret = ZSTD_getFrameContentSize(src, srcSize);
- if (ret >= ZSTD_CONTENTSIZE_ERROR) return ret;
+ { unsigned long long const fcs = ZSTD_getFrameContentSize(src, srcSize);
+ if (fcs >= ZSTD_CONTENTSIZE_ERROR) return fcs;
- /* check for overflow */
- if (totalDstSize + ret < totalDstSize) return ZSTD_CONTENTSIZE_ERROR;
- totalDstSize += ret;
+ if (totalDstSize + fcs < totalDstSize)
+ return ZSTD_CONTENTSIZE_ERROR; /* check for overflow */
+ totalDstSize += fcs;
}
+ /* skip to next frame */
{ size_t const frameSrcSize = ZSTD_findFrameCompressedSize(src, srcSize);
- if (ZSTD_isError(frameSrcSize)) {
- return ZSTD_CONTENTSIZE_ERROR;
- }
+ if (ZSTD_isError(frameSrcSize)) return ZSTD_CONTENTSIZE_ERROR;
+ assert(frameSrcSize <= srcSize);
src = (const BYTE *)src + frameSrcSize;
srcSize -= frameSrcSize;
@@ -1091,17 +1092,18 @@
}
#endif
- { U32 const magicNumber = MEM_readLE32(src);
- DEBUGLOG(4, "reading magic number %08X (expecting %08X)",
- (unsigned)magicNumber, ZSTD_MAGICNUMBER);
+ if (srcSize >= 4) {
+ U32 const magicNumber = MEM_readLE32(src);
+ DEBUGLOG(5, "reading magic number %08X", (unsigned)magicNumber);
if ((magicNumber & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) {
+ /* skippable frame detected : skip it */
size_t const skippableSize = readSkippableFrameSize(src, srcSize);
- FORWARD_IF_ERROR(skippableSize, "readSkippableFrameSize failed");
+ FORWARD_IF_ERROR(skippableSize, "invalid skippable frame");
assert(skippableSize <= srcSize);
src = (const BYTE *)src + skippableSize;
srcSize -= skippableSize;
- continue;
+ continue; /* check next frame */
} }
if (ddict) {
