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Replace trailing 1-element arrays with C99 flex-arrays #3785

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Replace trailing 1-element arrays with C99 flex-arrays #3785

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5 changes: 5 additions & 0 deletions lib/common/compiler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,11 @@
# include <intrin.h> /* For Visual 2005 */
# pragma warning(disable : 4100) /* disable: C4100: unreferenced formal parameter */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
/*
* Disable C4200: "nonstandard extension used: zero-sized array in struct/union"
* because it warns about standard C99 flexible arrays.
*/
# pragma warning(disable : 4200)
# pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */
# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */
# pragma warning(disable : 4324) /* disable: C4324: padded structure */
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2 changes: 1 addition & 1 deletion lib/common/fse.h
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Expand Up @@ -277,7 +277,7 @@ size_t FSE_buildCTable_wksp(FSE_CTable* ct, const short* normalizedCounter, unsi
FSE_PUBLIC_API size_t FSE_buildDTable_wksp(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog, void* workSpace, size_t wkspSize);
/**< Same as FSE_buildDTable(), using an externally allocated `workspace` produced with `FSE_BUILD_DTABLE_WKSP_SIZE_U32(maxSymbolValue)` */

#define FSE_DECOMPRESS_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) (FSE_DTABLE_SIZE_U32(maxTableLog) + 1 + FSE_BUILD_DTABLE_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) + (FSE_MAX_SYMBOL_VALUE + 1) / 2 + 1)
#define FSE_DECOMPRESS_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) (FSE_DTABLE_SIZE_U32(maxTableLog) + 1 + FSE_BUILD_DTABLE_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) + (FSE_MAX_SYMBOL_VALUE + 1) / 2)
#define FSE_DECOMPRESS_WKSP_SIZE(maxTableLog, maxSymbolValue) (FSE_DECOMPRESS_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) * sizeof(unsigned))
size_t FSE_decompress_wksp_bmi2(void* dst, size_t dstCapacity, const void* cSrc, size_t cSrcSize, unsigned maxLog, void* workSpace, size_t wkspSize, int bmi2);
/**< same as FSE_decompress(), using an externally allocated `workSpace` produced with `FSE_DECOMPRESS_WKSP_SIZE_U32(maxLog, maxSymbolValue)`.
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2 changes: 1 addition & 1 deletion lib/common/fse_decompress.c
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Expand Up @@ -237,7 +237,7 @@ FORCE_INLINE_TEMPLATE size_t FSE_decompress_usingDTable_generic(

typedef struct {
short ncount[FSE_MAX_SYMBOL_VALUE + 1];
FSE_DTable dtable[1]; /* Dynamically sized */
FSE_DTable dtable[]; /* Dynamically sized */
} FSE_DecompressWksp;


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12 changes: 6 additions & 6 deletions lib/compress/zstdmt_compress.c
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Expand Up @@ -100,13 +100,13 @@ typedef struct ZSTDMT_bufferPool_s {
unsigned totalBuffers;
unsigned nbBuffers;
ZSTD_customMem cMem;
buffer_t bTable[1]; /* variable size */
buffer_t bTable[]; /* variable size */
} ZSTDMT_bufferPool;

static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned maxNbBuffers, ZSTD_customMem cMem)
{
ZSTDMT_bufferPool* const bufPool = (ZSTDMT_bufferPool*)ZSTD_customCalloc(
sizeof(ZSTDMT_bufferPool) + (maxNbBuffers-1) * sizeof(buffer_t), cMem);
sizeof(ZSTDMT_bufferPool) + maxNbBuffers * sizeof(buffer_t), cMem);
if (bufPool==NULL) return NULL;
if (ZSTD_pthread_mutex_init(&bufPool->poolMutex, NULL)) {
ZSTD_customFree(bufPool, cMem);
Expand Down Expand Up @@ -136,7 +136,7 @@ static void ZSTDMT_freeBufferPool(ZSTDMT_bufferPool* bufPool)
static size_t ZSTDMT_sizeof_bufferPool(ZSTDMT_bufferPool* bufPool)
{
size_t const poolSize = sizeof(*bufPool)
+ (bufPool->totalBuffers - 1) * sizeof(buffer_t);
+ bufPool->totalBuffers * sizeof(buffer_t);
unsigned u;
size_t totalBufferSize = 0;
ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
Expand Down Expand Up @@ -350,7 +350,7 @@ typedef struct {
int totalCCtx;
int availCCtx;
ZSTD_customMem cMem;
ZSTD_CCtx* cctx[1]; /* variable size */
ZSTD_CCtx* cctx[]; /* variable size */
} ZSTDMT_CCtxPool;

/* note : all CCtx borrowed from the pool should be released back to the pool _before_ freeing the pool */
Expand All @@ -369,7 +369,7 @@ static ZSTDMT_CCtxPool* ZSTDMT_createCCtxPool(int nbWorkers,
ZSTD_customMem cMem)
{
ZSTDMT_CCtxPool* const cctxPool = (ZSTDMT_CCtxPool*) ZSTD_customCalloc(
sizeof(ZSTDMT_CCtxPool) + (nbWorkers-1)*sizeof(ZSTD_CCtx*), cMem);
sizeof(ZSTDMT_CCtxPool) + nbWorkers*sizeof(ZSTD_CCtx*), cMem);
assert(nbWorkers > 0);
if (!cctxPool) return NULL;
if (ZSTD_pthread_mutex_init(&cctxPool->poolMutex, NULL)) {
Expand Down Expand Up @@ -403,7 +403,7 @@ static size_t ZSTDMT_sizeof_CCtxPool(ZSTDMT_CCtxPool* cctxPool)
ZSTD_pthread_mutex_lock(&cctxPool->poolMutex);
{ unsigned const nbWorkers = cctxPool->totalCCtx;
size_t const poolSize = sizeof(*cctxPool)
+ (nbWorkers-1) * sizeof(ZSTD_CCtx*);
+ nbWorkers * sizeof(ZSTD_CCtx*);
unsigned u;
size_t totalCCtxSize = 0;
for (u=0; u<nbWorkers; u++) {
Expand Down
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