From 52d89d8443c4a31a69c0701062f2c7711d82bbed Mon Sep 17 00:00:00 2001 From: Lasse Collin Date: Tue, 31 Dec 2019 00:29:48 +0200 Subject: [PATCH] Rename read32ne to aligned_read32ne, and similarly for the others. Using the aligned methods requires more care to ensure that the address really is aligned, so it's nicer if the aligned methods are prefixed. The next commit will remove the unaligned_ prefix from the unaligned methods which in liblzma are used in more places than the aligned ones. --- src/common/tuklib_integer.h | 56 +++++++++++++++++----------------- src/liblzma/check/crc32_fast.c | 4 +-- src/liblzma/check/crc64_fast.c | 4 +-- 3 files changed, 32 insertions(+), 32 deletions(-) diff --git a/src/common/tuklib_integer.h b/src/common/tuklib_integer.h index 699d5fe6..e0f5dbee 100644 --- a/src/common/tuklib_integer.h +++ b/src/common/tuklib_integer.h @@ -9,16 +9,16 @@ /// Native endian inline functions (XX = 16, 32, or 64): /// - Unaligned native endian reads: unaligned_readXXne(ptr) /// - Unaligned native endian writes: unaligned_writeXXne(ptr, num) -/// - Aligned native endian reads: readXXne(ptr) -/// - Aligned native endian writes: writeXXne(ptr, num) +/// - Aligned native endian reads: aligned_readXXne(ptr) +/// - Aligned native endian writes: aligned_writeXXne(ptr, num) /// /// Endianness-converting integer operations (these can be macros!) /// (XX = 16, 32, or 64; Y = b or l): /// - Byte swapping: bswapXX(num) /// - Byte order conversions to/from native (byteswaps if Y isn't /// the native endianness): convXXYe(num) -/// - Aligned reads: readXXYe(ptr) -/// - Aligned writes: writeXXYe(ptr, num) +/// - Aligned reads: aligned_readXXYe(ptr) +/// - Aligned writes: aligned_writeXXYe(ptr, num) /// - Unaligned reads (16/32-bit only): unaligned_readXXYe(ptr) /// - Unaligned writes (16/32-bit only): unaligned_writeXXYe(ptr, num) /// @@ -447,7 +447,7 @@ unaligned_write32le(uint8_t *buf, uint32_t num) static inline uint16_t -read16ne(const uint8_t *buf) +aligned_read16ne(const uint8_t *buf) { #if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS) @@ -461,7 +461,7 @@ read16ne(const uint8_t *buf) static inline uint32_t -read32ne(const uint8_t *buf) +aligned_read32ne(const uint8_t *buf) { #if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS) @@ -475,7 +475,7 @@ read32ne(const uint8_t *buf) static inline uint64_t -read64ne(const uint8_t *buf) +aligned_read64ne(const uint8_t *buf) { #if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS) @@ -489,7 +489,7 @@ read64ne(const uint8_t *buf) static inline void -write16ne(uint8_t *buf, uint16_t num) +aligned_write16ne(uint8_t *buf, uint16_t num) { #ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING *(uint16_t *)buf = num; @@ -501,7 +501,7 @@ write16ne(uint8_t *buf, uint16_t num) static inline void -write32ne(uint8_t *buf, uint32_t num) +aligned_write32ne(uint8_t *buf, uint32_t num) { #ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING *(uint32_t *)buf = num; @@ -513,7 +513,7 @@ write32ne(uint8_t *buf, uint32_t num) static inline void -write64ne(uint8_t *buf, uint64_t num) +aligned_write64ne(uint8_t *buf, uint64_t num) { #ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING *(uint64_t *)buf = num; @@ -525,60 +525,60 @@ write64ne(uint8_t *buf, uint64_t num) static inline uint16_t -read16be(const uint8_t *buf) +aligned_read16be(const uint8_t *buf) { - uint16_t num = read16ne(buf); + uint16_t num = aligned_read16ne(buf); return conv16be(num); } static inline uint16_t -read16le(const uint8_t *buf) +aligned_read16le(const uint8_t *buf) { - uint16_t num = read16ne(buf); + uint16_t num = aligned_read16ne(buf); return conv16le(num); } static inline uint32_t -read32be(const uint8_t *buf) +aligned_read32be(const uint8_t *buf) { - uint32_t num = read32ne(buf); + uint32_t num = aligned_read32ne(buf); return conv32be(num); } static inline uint32_t -read32le(const uint8_t *buf) +aligned_read32le(const uint8_t *buf) { - uint32_t num = read32ne(buf); + uint32_t num = aligned_read32ne(buf); return conv32le(num); } static inline uint64_t -read64be(const uint8_t *buf) +aligned_read64be(const uint8_t *buf) { - uint64_t num = read64ne(buf); + uint64_t num = aligned_read64ne(buf); return conv64be(num); } static inline uint64_t -read64le(const uint8_t *buf) +aligned_read64le(const uint8_t *buf) { - uint64_t num = read64ne(buf); + uint64_t num = aligned_read64ne(buf); return conv64le(num); } // These need to be macros like in the unaligned case. -#define write16be(buf, num) write16ne((buf), conv16be(num)) -#define write16le(buf, num) write16ne((buf), conv16le(num)) -#define write32be(buf, num) write32ne((buf), conv32be(num)) -#define write32le(buf, num) write32ne((buf), conv32le(num)) -#define write64be(buf, num) write64ne((buf), conv64be(num)) -#define write64le(buf, num) write64ne((buf), conv64le(num)) +#define aligned_write16be(buf, num) aligned_write16ne((buf), conv16be(num)) +#define aligned_write16le(buf, num) aligned_write16ne((buf), conv16le(num)) +#define aligned_write32be(buf, num) aligned_write32ne((buf), conv32be(num)) +#define aligned_write32le(buf, num) aligned_write32ne((buf), conv32le(num)) +#define aligned_write64be(buf, num) aligned_write64ne((buf), conv64be(num)) +#define aligned_write64le(buf, num) aligned_write64ne((buf), conv64le(num)) //////////////////// diff --git a/src/liblzma/check/crc32_fast.c b/src/liblzma/check/crc32_fast.c index 3de02638..eed73505 100644 --- a/src/liblzma/check/crc32_fast.c +++ b/src/liblzma/check/crc32_fast.c @@ -49,7 +49,7 @@ lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc) // Calculate the CRC32 using the slice-by-eight algorithm. while (buf < limit) { - crc ^= *(const uint32_t *)(buf); + crc ^= aligned_read32ne(buf); buf += 4; crc = lzma_crc32_table[7][A(crc)] @@ -57,7 +57,7 @@ lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc) ^ lzma_crc32_table[5][C(crc)] ^ lzma_crc32_table[4][D(crc)]; - const uint32_t tmp = *(const uint32_t *)(buf); + const uint32_t tmp = aligned_read32ne(buf); buf += 4; // At least with some compilers, it is critical for diff --git a/src/liblzma/check/crc64_fast.c b/src/liblzma/check/crc64_fast.c index 52af29ed..8af54cda 100644 --- a/src/liblzma/check/crc64_fast.c +++ b/src/liblzma/check/crc64_fast.c @@ -47,9 +47,9 @@ lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc) while (buf < limit) { #ifdef WORDS_BIGENDIAN const uint32_t tmp = (crc >> 32) - ^ *(const uint32_t *)(buf); + ^ aligned_read32ne(buf); #else - const uint32_t tmp = crc ^ *(const uint32_t *)(buf); + const uint32_t tmp = crc ^ aligned_read32ne(buf); #endif buf += 4;