From: Gustavo A. R. Silva Date: Fri, 25 Jan 2019 03:37:43 +0000 (-0600) Subject: lib: zstd: Mark expected switch fall-throughs X-Git-Tag: v5.15~6454^2~7 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=224b44d46ffe9ad7785cc45c7a18934d492e66ec;p=platform%2Fkernel%2Flinux-starfive.git lib: zstd: Mark expected switch fall-throughs In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: lib/zstd/bitstream.h:261:30: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/bitstream.h:262:30: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/bitstream.h:263:30: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/bitstream.h:264:30: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/bitstream.h:265:30: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/compress.c:3183:16: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/decompress.c:1770:18: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/decompress.c:2376:15: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/decompress.c:2404:15: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/decompress.c:2435:16: warning: this statement may fall through [-Wimplicit-fallthrough=] lib/zstd/huf_compress.c: In function ‘HUF_compress1X_usingCTable’: lib/zstd/huf_compress.c:535:5: warning: this statement may fall through [-Wimplicit-fallthrough=] if (sizeof((stream)->bitContainer) * 8 < HUF_TABLELOG_MAX * 4 + 7) \ ^ lib/zstd/huf_compress.c:558:54: note: in expansion of macro ‘HUF_FLUSHBITS_2’ case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC); ^~~~~~~~~~~~~~~ lib/zstd/huf_compress.c:559:2: note: here case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC); ^~~~ lib/zstd/huf_compress.c:531:5: warning: this statement may fall through [-Wimplicit-fallthrough=] if (sizeof((stream)->bitContainer) * 8 < HUF_TABLELOG_MAX * 2 + 7) \ ^ lib/zstd/huf_compress.c:559:54: note: in expansion of macro ‘HUF_FLUSHBITS_1’ case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC); ^~~~~~~~~~~~~~~ lib/zstd/huf_compress.c:560:2: note: here case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC); ^~~~ AR lib/zstd//built-in.a Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enabling -Wimplicit-fallthrough. Reviewed-by: Kees Cook Signed-off-by: Gustavo A. R. Silva --- diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h index a826b99..3a49784 100644 --- a/lib/zstd/bitstream.h +++ b/lib/zstd/bitstream.h @@ -259,10 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s bitD->bitContainer = *(const BYTE *)(bitD->start); switch (srcSize) { case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16); + /* fall through */ case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24); + /* fall through */ case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32); + /* fall through */ case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24; + /* fall through */ case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16; + /* fall through */ case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8; default:; } diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c index f9166cf..5e0b670 100644 --- a/lib/zstd/compress.c +++ b/lib/zstd/compress.c @@ -3182,6 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t * zcs->outBuffFlushedSize = 0; zcs->stage = zcss_flush; /* pass-through to flush stage */ } + /* fall through */ case zcss_flush: { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize; diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c index b178467..269ee9a 100644 --- a/lib/zstd/decompress.c +++ b/lib/zstd/decompress.c @@ -1768,6 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c return 0; } dctx->expected = 0; /* not necessary to copy more */ + /* fall through */ case ZSTDds_decodeFrameHeader: memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); @@ -2375,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB } zds->stage = zdss_read; } - /* pass-through */ + /* fall through */ case zdss_read: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2404,6 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB zds->stage = zdss_load; /* pass-through */ } + /* fall through */ case zdss_load: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2436,6 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB /* pass-through */ } } + /* fall through */ case zdss_flush: { size_t const toFlushSize = zds->outEnd - zds->outStart; diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c index 40055a7..e727812 100644 --- a/lib/zstd/huf_compress.c +++ b/lib/zstd/huf_compress.c @@ -556,7 +556,9 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si n = srcSize & ~3; /* join to mod 4 */ switch (srcSize & 3) { case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC); + /* fall through */ case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC); + /* fall through */ case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC); case 0: default:;