/* ----------------------------------------------------------------------- * * * Copyright 2007-2020 The NASM Authors - All Rights Reserved * See the file AUTHORS included with the NASM distribution for * the specific copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following * conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * ----------------------------------------------------------------------- */ /* * compiler.h * * Compiler-specific macros for NASM. Feel free to add support for * other compilers in here. * * This header file should be included before any other header. */ #ifndef NASM_COMPILER_H #define NASM_COMPILER_H … /* * At least DJGPP and Cygwin have broken header files if __STRICT_ANSI__ * is defined. */ #ifdef __GNUC__ # undef __STRICT_ANSI__ #endif /* On Microsoft platforms we support multibyte character sets in filenames */ #define _MBCS … #ifdef HAVE_CONFIG_H # include "config/config.h" #else # if defined(_MSC_VER) && (_MSC_VER >= 1310) # include "config/msvc.h" # elif defined(__WATCOMC__) # include "config/watcom.h" # else # include "config/unknown.h" # endif /* This unconditionally defines some macros we really want */ # include "config/unconfig.h" #endif /* Configuration file */ /* This is required to get the standard <inttypes.h> macros when compiling with a C++ compiler. This must be defined *before* <inttypes.h> is included, directly or indirectly. */ #define __STDC_CONSTANT_MACROS … #define __STDC_LIMIT_MACROS … #define __STDC_FORMAT_MACROS … #ifdef HAVE_INTTYPES_H # include <inttypes.h> #else # include "nasmint.h" #endif #include <assert.h> #include <stddef.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <limits.h> #include <errno.h> #ifdef HAVE_STRINGS_H # include <strings.h> #endif #ifdef HAVE_SYS_TYPES_H # include <sys/types.h> #endif #ifdef HAVE_ENDIAN_H # include <endian.h> #elif defined(HAVE_SYS_ENDIAN_H) # include <sys/endian.h> #elif defined(HAVE_MACHINE_ENDIAN_H) # include <machine/endian.h> #endif /* * If we have BYTE_ORDER defined, or the compiler provides * __BIG_ENDIAN__ or __LITTLE_ENDIAN__, trust it over what autoconf * came up with, especially since autoconf obviously can't figure * things out for a universal compiler. */ #if defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__) # undef WORDS_LITTLEENDIAN # undef WORDS_BIGENDIAN #define WORDS_BIGENDIAN … #elif defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__) # undef WORDS_LITTLEENDIAN # undef WORDS_BIGENDIAN #define WORDS_LITTLEENDIAN … #elif defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && defined(BIG_ENDIAN) # undef WORDS_LITTLEENDIAN # undef WORDS_BIGENDIAN # if BYTE_ORDER == LITTLE_ENDIAN #define WORDS_LITTLEENDIAN … # elif BYTE_ORDER == BIG_ENDIAN #define WORDS_BIGENDIAN … # endif #endif /* * Define this to 1 for faster performance if this is a littleendian * platform *and* it can do arbitrary unaligned memory references. It * is safe to leave it defined to 0 even if that is true. */ #if defined(__386__) || defined(__i386__) || defined(__x86_64__) \ || defined(_M_IX86) || defined(_M_X64) #define X86_MEMORY … # undef WORDS_BIGENDIAN # undef WORDS_LITTLEENDIAN #define WORDS_LITTLEENDIAN … #else #define X86_MEMORY … #endif /* Some versions of MSVC have these only with underscores in front */ #ifndef HAVE_SNPRINTF # ifdef HAVE__SNPRINTF #define snprintf … # else int snprintf(char *, size_t, const char *, ...); # endif #endif #ifndef HAVE_VSNPRINTF # ifdef HAVE__VSNPRINTF #define vsnprintf … # else int vsnprintf(char *, size_t, const char *, va_list); # endif #endif #if !defined(HAVE_STRLCPY) || !HAVE_DECL_STRLCPY size_t strlcpy(char *, const char *, size_t); #endif #if !defined(HAVE_STRCHRNUL) || !HAVE_DECL_STRCHRNUL char *strrchrnul(const char *, int); #endif #ifndef __cplusplus /* C++ has false, true, bool as keywords */ # ifdef HAVE_STDBOOL_H # include <stdbool.h> # elif defined(HAVE__BOOL) bool; #define false … #define true … # else /* This is sort of dangerous, since casts will behave different than casting to the standard boolean type. Always use !!, not (bool). */ typedef enum bool { false, true } bool; # endif #endif /* Create a NULL pointer of the same type as the address of the argument, without actually evaluating said argument. */ #define nullas(p) … /* Convert an offsetted NULL pointer dereference to a size_t offset. Technically non-portable as taking the offset from a NULL pointer is undefined behavior, but... */ #define null_offset(p) … /* Provide a substitute for offsetof() if we don't have one. This variant works on most (but not *all*) systems... */ #ifndef offsetof #define offsetof … #endif /* If typeof is defined as a macro, assume we have typeof even if HAVE_TYPEOF is not declared (e.g. due to not using autoconf.) */ #ifdef typeof #define HAVE_TYPEOF … #endif /* This is like offsetof(), but takes an object rather than a type. */ #ifndef offsetin # ifdef HAVE_TYPEOF #define offsetin(p,m) … # else #define offsetin … # endif #endif /* The container_of construct: if p is a pointer to member m of container class c, then return a pointer to the container of which *p is a member. */ #ifndef container_of #define container_of(p, c, m) … #endif /* Some misguided platforms hide the defs for these */ #if defined(HAVE_STRCASECMP) && !HAVE_DECL_STRCASECMP int strcasecmp(const char *, const char *); #endif #if defined(HAVE_STRICMP) && !HAVE_DECL_STRICMP int stricmp(const char *, const char *); #endif #if defined(HAVE_STRNCASECMP) && !HAVE_DECL_STRNCASECMP int strncasecmp(const char *, const char *, size_t); #endif #if defined(HAVE_STRNICMP) && !HAVE_DECL_STRNICMP int strnicmp(const char *, const char *, size_t); #endif #if defined(HAVE_STRSEP) && !HAVE_DECL_STRSEP char *strsep(char **, const char *); #endif #if !HAVE_DECL_STRNLEN size_t strnlen(const char *s, size_t maxlen); #endif #ifndef HAVE_MEMPCPY static inline void *mempcpy(void *dst, const void *src, size_t n) { return (char *)memcpy(dst, src, n) + n; } #endif /* * Hack to support external-linkage inline functions */ #ifndef HAVE_STDC_INLINE # ifdef __GNUC__ # ifdef __GNUC_STDC_INLINE__ #define HAVE_STDC_INLINE # else #define HAVE_GNU_INLINE # endif # elif defined(__GNUC_GNU_INLINE__) /* Some other compiler implementing only GNU inline semantics? */ #define HAVE_GNU_INLINE # elif defined(_MSC_VER) /* In MSVC and clang when it is pretending to be MSVC, inline behaves it does in * C++. */ #define HAVE_MSVC_INLINE # elif defined(__STDC_VERSION__) # if __STDC_VERSION__ >= 199901L #define HAVE_STDC_INLINE # endif # endif #endif #ifdef HAVE_STDC_INLINE #define extern_inline … #elif defined(HAVE_GNU_INLINE) #define extern_inline … #define inline_prototypes #elif defined(HAVE_MSVC_INLINE) #define extern_inline … #else #define inline_prototypes #endif /* * Hints to the compiler that a particular branch of code is more or * less likely to be taken. */ #if HAVE___BUILTIN_EXPECT #define likely(x) … #define unlikely(x) … #else #define likely … #define unlikely … #endif #define safe_alloc … #define safe_alloc_ptr … #define safe_malloc(s) … #define safe_malloc2(s1,s2) … #define safe_realloc(s) … #define safe_malloc_ptr(s) … #define safe_malloc2_ptr(s1,s2) … #define safe_realloc_ptr(s) … /* * How to tell the compiler that a function doesn't return */ #ifdef HAVE_STDNORETURN_H # include <stdnoreturn.h> #define no_return … #elif defined(_MSC_VER) #define no_return … #else #define no_return … #endif /* * A fatal function is both unlikely and no_return */ #define fatal_func … #define fatal_func_ptr … /* * How to tell the compiler that a function takes a printf-like string */ #define printf_func(fmt, list) … #define printf_func_ptr(fmt, list) … /* Determine probabilistically if something is a compile-time constant */ #ifdef HAVE___BUILTIN_CONSTANT_P # if defined(__GNUC__) && (__GNUC__ >= 5) #define is_constant … # else #define is_constant(x) … # endif #else #define is_constant … #endif /* * If we can guarantee that a particular expression is constant, use it, * otherwise use a different version. */ #if defined(__GNUC__) && (__GNUC__ >= 3) #define not_pedantic_start … #define not_pedantic_end … #else #define not_pedantic_start #define not_pedantic_end #endif #ifdef HAVE___BUILTIN_CHOOSE_EXPR #define if_constant(x,y) … #else #define if_constant … #endif /* * The autoconf documentation states: * * `va_copy' * The C99 standard provides `va_copy' for copying `va_list' * variables. It may be available in older environments too, though * possibly as `__va_copy' (e.g., `gcc' in strict pre-C99 mode). * These can be tested with `#ifdef'. A fallback to `memcpy (&dst, * &src, sizeof (va_list))' gives maximum portability. */ #ifndef va_copy # ifdef __va_copy #define va_copy … # else #define va_copy … # endif #endif /* * If SIZE_MAX is not defined, rely on size_t being unsigned */ #ifndef SIZE_MAX #define SIZE_MAX … #endif /* Watcom doesn't handle switch statements with 64-bit types, hack around it */ #ifdef __WATCOMC__ #define BOGUS_CASE … static inline unsigned int watcom_switch_hack(uint64_t x) { if (x > (uint64_t)UINT_MAX) return BOGUS_CASE; else return (unsigned int)x; } # define switch(x) switch(sizeof(x) > sizeof(unsigned int) \ ? watcom_switch_hack(x) : (unsigned int)(x)) /* This is to make sure BOGUS_CASE doesn't conflict with anything real... */ # define default case BOGUS_CASE: default #endif #endif /* NASM_COMPILER_H */
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