diff options
Diffstat (limited to 'src/common/tuklib_integer.h')
| -rw-r--r-- | src/common/tuklib_integer.h | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/src/common/tuklib_integer.h b/src/common/tuklib_integer.h index e22aa8a..fbd5fb2 100644 --- a/src/common/tuklib_integer.h +++ b/src/common/tuklib_integer.h @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: 0BSD + /////////////////////////////////////////////////////////////////////////////// // /// \file tuklib_integer.h @@ -14,7 +16,7 @@ /// /// Endianness-converting integer operations (these can be macros!) /// (XX = 16, 32, or 64; Y = b or l): -/// - Byte swapping: bswapXX(num) +/// - Byte swapping: byteswapXX(num) /// - Byte order conversions to/from native (byteswaps if Y isn't /// the native endianness): convXXYe(num) /// - Unaligned reads: readXXYe(ptr) @@ -37,9 +39,6 @@ // Authors: Lasse Collin // Joachim Henke // -// This file has been put into the public domain. -// You can do whatever you want with this file. -// /////////////////////////////////////////////////////////////////////////////// #ifndef TUKLIB_INTEGER_H @@ -67,38 +66,41 @@ #if defined(HAVE___BUILTIN_BSWAPXX) // GCC >= 4.8 and Clang -# define bswap16(n) __builtin_bswap16(n) -# define bswap32(n) __builtin_bswap32(n) -# define bswap64(n) __builtin_bswap64(n) +# define byteswap16(num) __builtin_bswap16(num) +# define byteswap32(num) __builtin_bswap32(num) +# define byteswap64(num) __builtin_bswap64(num) #elif defined(HAVE_BYTESWAP_H) // glibc, uClibc, dietlibc # include <byteswap.h> # ifdef HAVE_BSWAP_16 -# define bswap16(num) bswap_16(num) +# define byteswap16(num) bswap_16(num) # endif # ifdef HAVE_BSWAP_32 -# define bswap32(num) bswap_32(num) +# define byteswap32(num) bswap_32(num) # endif # ifdef HAVE_BSWAP_64 -# define bswap64(num) bswap_64(num) +# define byteswap64(num) bswap_64(num) # endif #elif defined(HAVE_SYS_ENDIAN_H) // *BSDs and Darwin # include <sys/endian.h> +# define byteswap16(num) bswap16(num) +# define byteswap32(num) bswap32(num) +# define byteswap64(num) bswap64(num) #elif defined(HAVE_SYS_BYTEORDER_H) // Solaris # include <sys/byteorder.h> # ifdef BSWAP_16 -# define bswap16(num) BSWAP_16(num) +# define byteswap16(num) BSWAP_16(num) # endif # ifdef BSWAP_32 -# define bswap32(num) BSWAP_32(num) +# define byteswap32(num) BSWAP_32(num) # endif # ifdef BSWAP_64 -# define bswap64(num) BSWAP_64(num) +# define byteswap64(num) BSWAP_64(num) # endif # ifdef BE_16 # define conv16be(num) BE_16(num) @@ -120,15 +122,15 @@ # endif #endif -#ifndef bswap16 -# define bswap16(n) (uint16_t)( \ +#ifndef byteswap16 +# define byteswap16(n) (uint16_t)( \ (((n) & 0x00FFU) << 8) \ | (((n) & 0xFF00U) >> 8) \ ) #endif -#ifndef bswap32 -# define bswap32(n) (uint32_t)( \ +#ifndef byteswap32 +# define byteswap32(n) (uint32_t)( \ (((n) & UINT32_C(0x000000FF)) << 24) \ | (((n) & UINT32_C(0x0000FF00)) << 8) \ | (((n) & UINT32_C(0x00FF0000)) >> 8) \ @@ -136,8 +138,8 @@ ) #endif -#ifndef bswap64 -# define bswap64(n) (uint64_t)( \ +#ifndef byteswap64 +# define byteswap64(n) (uint64_t)( \ (((n) & UINT64_C(0x00000000000000FF)) << 56) \ | (((n) & UINT64_C(0x000000000000FF00)) << 40) \ | (((n) & UINT64_C(0x0000000000FF0000)) << 24) \ @@ -161,23 +163,23 @@ # define conv64be(num) ((uint64_t)(num)) # endif # ifndef conv16le -# define conv16le(num) bswap16(num) +# define conv16le(num) byteswap16(num) # endif # ifndef conv32le -# define conv32le(num) bswap32(num) +# define conv32le(num) byteswap32(num) # endif # ifndef conv64le -# define conv64le(num) bswap64(num) +# define conv64le(num) byteswap64(num) # endif #else # ifndef conv16be -# define conv16be(num) bswap16(num) +# define conv16be(num) byteswap16(num) # endif # ifndef conv32be -# define conv32be(num) bswap32(num) +# define conv32be(num) byteswap32(num) # endif # ifndef conv64be -# define conv64be(num) bswap64(num) +# define conv64be(num) byteswap64(num) # endif # ifndef conv16le # define conv16le(num) ((uint16_t)(num)) @@ -251,7 +253,7 @@ // was one instruction longer. // // Conclusion: At least in case of GCC and Clang, byte-by-byte code is -// the best choise for strict-align archs to do unaligned access. +// the best choice for strict-align archs to do unaligned access. // // See also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111502 // @@ -625,7 +627,7 @@ write64le(uint8_t *buf, uint64_t num) // aligned but some compilers have language extensions to do that. With // such language extensions the memcpy() method gives excellent results. // -// What to do on a strict-align system when no known language extentensions +// What to do on a strict-align system when no known language extensions // are available? Falling back to byte-by-byte access would be safe but ruin // optimizations that have been made specifically with aligned access in mind. // As a compromise, aligned reads will fall back to non-compliant type punning |