Implement the full range of BSD endianness conversion functions.

This commit is contained in:
Dag-Erling Smørgrav 2016-09-15 11:18:01 +02:00 committed by Dag-Erling Smørgrav
parent 1ce9c07b8b
commit d9b6740247
3 changed files with 305 additions and 1 deletions

View file

@ -20,6 +20,19 @@ AC_C_CONST
AC_C_RESTRICT
AC_C_VOLATILE
AC_C_BIGENDIAN
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_INT8_T
AC_TYPE_INTMAX_T
AC_TYPE_INTPTR_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT8_T
AC_TYPE_UINTMAX_T
AC_TYPE_UINTPTR_T
# libtool
LT_PREREQ([2.2.6])
@ -34,10 +47,18 @@ AC_PROG_INSTALL
#
AC_CHECK_HEADERS([endian.h sys/endian.h])
AX_GCC_BUILTIN([__builtin_bswap16])
AX_GCC_BUILTIN([__builtin_bswap32])
AX_GCC_BUILTIN([__builtin_bswap64])
AC_CHECK_DECLS([
bswap16, bswap32, bswap64,
be16enc, be16dec, le16enc, le16dec,
be32enc, be32dec, le32enc, le32dec,
be64enc, be64dec, le64enc, le64dec
be64enc, be64dec, le64enc, le64dec,
htobe16, be16toh, htole16, le16toh,
htobe32, be32toh, htole32, le32toh,
htobe64, be64toh, htole64, le64toh,
nothing
], [], [], [[
#if HAVE_SYS_ENDIAN_H
#include <sys/endian.h>

View file

@ -1,5 +1,6 @@
/*-
* Copyright (c) 2014 Dag-Erling Smørgrav
* Copyright (c) 2016 Universitetet i Oslo
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -42,6 +43,15 @@
#include <endian.h>
#endif
#if !HAVE_DECL_BSWAP16
#define bswap16 cryb_bswap16
#endif
#if !HAVE_DECL_BSWAP32
#define bswap32 cryb_bswap32
#endif
#if !HAVE_DECL_BSWAP64
#define bswap64 cryb_bswap64
#endif
#if !HAVE_DECL_BE16ENC
#define be16enc cryb_be16enc
#endif
@ -78,6 +88,83 @@
#if !HAVE_DECL_LE64DEC
#define le64dec cryb_le64dec
#endif
#if !HAVE_DECL_HTOBE16
#define htobe16 cryb_htobe16
#endif
#if !HAVE_DECL_BE16TOH
#define be16toh cryb_be16toh
#endif
#if !HAVE_DECL_HTOLE16
#define htole16 cryb_htole16
#endif
#if !HAVE_DECL_LE16TOH
#define le16toh cryb_le16toh
#endif
#if !HAVE_DECL_HTOBE32
#define htobe32 cryb_htobe32
#endif
#if !HAVE_DECL_BE32TOH
#define be32toh cryb_be32toh
#endif
#if !HAVE_DECL_HTOLE32
#define htole32 cryb_htole32
#endif
#if !HAVE_DECL_LE32TOH
#define le32toh cryb_le32toh
#endif
#if !HAVE_DECL_HTOBE64
#define htobe64 cryb_htobe64
#endif
#if !HAVE_DECL_BE64TOH
#define be64toh cryb_be64toh
#endif
#if !HAVE_DECL_HTOLE64
#define htole64 cryb_htole64
#endif
#if !HAVE_DECL_LE64TOH
#define le64toh cryb_le64toh
#endif
static inline uint16_t
cryb_bswap16(uint16_t u16)
{
#if HAVE___BUILTIN_BSWAP16
return (__builtin_bswap16(u16));
#else
return (((u16 & 0x00ffU) >> 0) << 8 |
((u16 & 0xff00U) >> 8) << 0);
#endif
}
static inline uint32_t
cryb_bswap32(uint32_t u32)
{
#if HAVE___BUILTIN_BSWAP32
return (__builtin_bswap32(u32));
#else
return (((u32 & 0x000000ffLU) >> 0) << 24 |
((u32 & 0x0000ff00LU) >> 8) << 16 |
((u32 & 0x00ff0000LU) >> 16) << 8 |
((u32 & 0xff000000LU) >> 24) << 0);
#endif
}
static inline uint64_t
cryb_bswap64(uint64_t u64)
{
#if HAVE___BUILTIN_BSWAP64
return (__builtin_bswap64(u64));
#else
return (((u64 & 0x00000000000000ffLLU) >> 0) << 56 |
((u64 & 0x000000000000ff00LLU) >> 8) << 48 |
((u64 & 0x0000000000ff0000LLU) >> 16) << 40 |
((u64 & 0x00000000ff000000LLU) >> 24) << 32 |
((u64 & 0x000000ff00000000LLU) >> 32) << 24 |
((u64 & 0x0000ff0000000000LLU) >> 40) << 16 |
((u64 & 0x00ff000000000000LLU) >> 48) << 8 |
((u64 & 0xff00000000000000LLU) >> 56) << 0);
#endif
}
static inline void
cryb_be16enc(void *p, uint16_t u16)
@ -195,4 +282,112 @@ cryb_le64dec(const void *p)
(uint64_t)((const uint8_t *)p)[7] << 56);
}
static inline uint16_t
cryb_htobe16(uint16_t u16)
{
#if !WORDS_BIGENDIAN
u16 = cryb_bswap16(u16);
#endif
return (u16);
}
static inline uint16_t
cryb_be16toh(uint16_t u16)
{
#if !WORDS_BIGENDIAN
u16 = cryb_bswap16(u16);
#endif
return (u16);
}
static inline uint16_t
cryb_htole16(uint16_t u16)
{
#if WORDS_BIGENDIAN
u16 = cryb_bswap16(u16);
#endif
return (u16);
}
static inline uint16_t
cryb_le16toh(uint16_t u16)
{
#if WORDS_BIGENDIAN
u16 = cryb_bswap16(u16);
#endif
return (u16);
}
static inline uint32_t
cryb_htobe32(uint32_t u32)
{
#if !WORDS_BIGENDIAN
u32 = cryb_bswap32(u32);
#endif
return (u32);
}
static inline uint32_t
cryb_be32toh(uint32_t u32)
{
#if !WORDS_BIGENDIAN
u32 = cryb_bswap32(u32);
#endif
return (u32);
}
static inline uint32_t
cryb_htole32(uint32_t u32)
{
#if WORDS_BIGENDIAN
u32 = cryb_bswap32(u32);
#endif
return (u32);
}
static inline uint32_t
cryb_le32toh(uint32_t u32)
{
#if WORDS_BIGENDIAN
u32 = cryb_bswap32(u32);
#endif
return (u32);
}
static inline uint64_t
cryb_htobe64(uint64_t u64)
{
#if !WORDS_BIGENDIAN
u64 = cryb_bswap64(u64);
#endif
return (u64);
}
static inline uint64_t
cryb_be64toh(uint64_t u64)
{
#if !WORDS_BIGENDIAN
u64 = cryb_bswap64(u64);
#endif
return (u64);
}
static inline uint64_t
cryb_htole64(uint64_t u64)
{
#if WORDS_BIGENDIAN
u64 = cryb_bswap64(u64);
#endif
return (u64);
}
static inline uint64_t
cryb_le64toh(uint64_t u64)
{
#if WORDS_BIGENDIAN
u64 = cryb_bswap64(u64);
#endif
return (u64);
}
#endif

View file

@ -35,6 +35,11 @@
#include <stdio.h>
#include <string.h>
/* test our own code, not the compiler's */
#undef HAVE___BUILTIN_BSWAP16
#undef HAVE___BUILTIN_BSWAP32
#undef HAVE___BUILTIN_BSWAP64
#include <cryb/endian.h>
#include <cryb/test.h>
@ -45,10 +50,27 @@ static uint64_t be64 = 0xdeadbeefcafef001ULL;
static uint16_t le16 = 0x01f0U;
static uint32_t le32 = 0xefbeaddeUL;
static uint64_t le64 = 0x01f0fecaefbeaddeULL;
static uint16_t h16;
static uint32_t h32;
static uint64_t h64;
static const void *s16 = "\xf0\x01";
static const void *s32 = "\xde\xad\xbe\xef";
static const void *s64 = "\xde\xad\xbe\xef\xca\xfe\xf0\x01";
#define T_BSWAP(w) \
static int \
t_bswap##w(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) \
{ \
uint##w##_t swap; \
\
swap = cryb_bswap##w(be##w); \
return (t_compare_x##w(le##w, swap)); \
}
T_BSWAP(16);
T_BSWAP(32);
T_BSWAP(64);
#define T_DEC(e, w) \
static int \
t_##e##w##dec(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) \
@ -83,15 +105,55 @@ T_ENC(le, 16)
T_ENC(le, 32)
T_ENC(le, 64)
#define T_HTO(e, w) \
static int \
t_hto##e##w(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) \
{ \
uint##w##_t e; \
\
e = cryb_hto##e##w(h##w); \
return (t_compare_x##w(e##w, e)); \
}
T_HTO(be, 16);
T_HTO(be, 32);
T_HTO(be, 64);
T_HTO(le, 16);
T_HTO(le, 32);
T_HTO(le, 64);
#define T_TOH(e, w) \
static int \
t_##e##w##toh(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) \
{ \
uint##w##_t h; \
\
h = cryb_##e##w##toh(e##w); \
return (t_compare_x##w(h##w, h)); \
}
T_TOH(be, 16);
T_TOH(be, 32);
T_TOH(be, 64);
T_TOH(le, 16);
T_TOH(le, 32);
T_TOH(le, 64);
/***************************************************************************
* Boilerplate
*/
#define T_BSWAP_ADD(w) \
t_add_test(t_bswap##w, 0, "bswap" #w);
#define T_DEC_ADD(e, w) \
t_add_test(t_##e##w##dec, 0, #e #w "dec");
#define T_ENC_ADD(e, w) \
t_add_test(t_##e##w##enc, 0, #e #w "enc");
#define T_HTO_ADD(e, w) \
t_add_test(t_hto##e##w, 0, "hto" #e #w);
#define T_TOH_ADD(e, w) \
t_add_test(t_##e##w##toh, 0, #e #w "toh");
static int
t_prepare(int argc, char *argv[])
@ -99,6 +161,20 @@ t_prepare(int argc, char *argv[])
(void)argc;
(void)argv;
#if WORD_BIGENDIAN
h16 = be16;
h32 = be32;
h64 = be64;
#else
h16 = le16;
h32 = le32;
h64 = le64;
#endif
T_BSWAP_ADD(16);
T_BSWAP_ADD(32);
T_BSWAP_ADD(64);
T_DEC_ADD(be, 16);
T_DEC_ADD(be, 32);
T_DEC_ADD(be, 64);
@ -111,6 +187,18 @@ t_prepare(int argc, char *argv[])
T_ENC_ADD(le, 16);
T_ENC_ADD(le, 32);
T_ENC_ADD(le, 64);
T_HTO_ADD(be, 16);
T_HTO_ADD(be, 32);
T_HTO_ADD(be, 64);
T_HTO_ADD(le, 16);
T_HTO_ADD(le, 32);
T_HTO_ADD(le, 64);
T_TOH_ADD(be, 16);
T_TOH_ADD(be, 32);
T_TOH_ADD(be, 64);
T_TOH_ADD(le, 16);
T_TOH_ADD(le, 32);
T_TOH_ADD(le, 64);
return (0);
}