X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ca94c264bf987ff4ec7adffabca2a8d2e4e07efb..HEAD:/netdissect-stdinc.h diff --git a/netdissect-stdinc.h b/netdissect-stdinc.h index 7bea0c4f..15c3e284 100644 --- a/netdissect-stdinc.h +++ b/netdissect-stdinc.h @@ -39,12 +39,32 @@ #ifndef netdissect_stdinc_h #define netdissect_stdinc_h +#include "ftmacros.h" + #include #include "compiler-tests.h" #include "varattrs.h" +/* + * If we're compiling with Visual Studio, make sure we have at least + * VS 2015 or later, so we have sufficient C99 support. + * + * XXX - verify that we have at least C99 support on UN*Xes? + * + * What about MinGW or various DOS toolchains? We're currently assuming + * sufficient C99 support there. + */ +#if defined(_MSC_VER) + /* + * Make sure we have VS 2015 or later. + */ + #if _MSC_VER < 1900 + #error "Building tcpdump requires VS 2015 or later" + #endif +#endif + /* * Get the C99 types, and the PRI[doux]64 format strings, defined. */ @@ -63,97 +83,37 @@ * worry about other headers including it and causing * clashes. */ - #if defined(_MSC_VER) - /* - * Compiler is MSVC. - */ - #if _MSC_VER >= 1800 - /* - * VS 2013 or newer; we have . - */ - #include - #else - /* - * Earlier VS; we have to define this stuff ourselves. - */ - typedef unsigned char uint8_t; - typedef signed char int8_t; - typedef unsigned short uint16_t; - typedef signed short int16_t; - typedef unsigned int uint32_t; - typedef signed int int32_t; - #ifdef _MSC_EXTENSIONS - typedef unsigned _int64 uint64_t; - typedef _int64 int64_t; - #else /* _MSC_EXTENSIONS */ - typedef unsigned long long uint64_t; - typedef long long int64_t; - #endif - - /* - * We have _strtoi64(). Use that for strtoint64_t(). - */ - #define strtoint64_t _strtoi64 - #endif + /* + * Include to get the integer types and PRi[doux]64 values + * defined. + * + * If the compiler is MSVC, we require VS 2015 or newer, so we + * have - and support for %zu in the formatted + * printing functions. + * + * If the compiler is MinGW, we assume we have - and + * support for %zu in the formatted printing functions. + * + * If the target is UN*X, we assume we have a C99-or-later development + * environment, and thus have - and support for %zu in + * the formatted printing functions. + * + * If the target is MS-DOS, we assume we have - and support + * for %zu in the formatted printing functions. + */ + #include + + #if defined(_MSC_VER) /* * Suppress definition of intN_t in bittypes.h, which might be included * by in older versions of WinPcap. - * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented, and - * we check for u_intN_t in the UN*X configure script.) + * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented.) */ #define HAVE_U_INT8_T #define HAVE_U_INT16_T #define HAVE_U_INT32_T #define HAVE_U_INT64_T - - /* - * These may be defined by . If not, define them - * ourselves. - * - * XXX - for MSVC, we always want the _MSC_EXTENSIONS versions. - * What about other compilers? If, as the MinGW Web site says MinGW - * does, the other compilers just use Microsoft's run-time library, - * then they should probably use the _MSC_EXTENSIONS even if the - * compiler doesn't define _MSC_EXTENSIONS. - */ - #ifndef PRId64 - #ifdef _MSC_EXTENSIONS - #define PRId64 "I64d" - #else - #define PRId64 "lld" - #endif - #endif /* PRId64 */ - - #ifndef PRIo64 - #ifdef _MSC_EXTENSIONS - #define PRIo64 "I64o" - #else - #define PRIo64 "llo" - #endif - #endif /* PRIo64 */ - - #ifndef PRIx64 - #ifdef _MSC_EXTENSIONS - #define PRIx64 "I64x" - #else - #define PRIx64 "llx" - #endif - #endif - - #ifndef PRIu64 - #ifdef _MSC_EXTENSIONS - #define PRIu64 "I64u" - #else - #define PRIu64 "llu" - #endif - #endif - #elif defined(__MINGW32__) || !defined(_WIN32) - /* - * Compiler is MinGW or target is UN*X or MS-DOS. Just use - * . - */ - #include #endif #endif /* HAVE_PCAP_PCAP_INTTYPES_H */ @@ -166,7 +126,6 @@ #include #include #include -#include #include #include #include @@ -175,25 +134,11 @@ #ifdef _MSC_VER /* * Compiler is MSVC. + * + * We require VS 2015 or newer, so we have strtoll(). Use that for + * strtoint64_t(). */ - #if _MSC_VER >= 1800 - /* - * VS 2013 or newer; we have strtoll(). Use that for strtoint64_t(). - */ - #define strtoint64_t strtoll - #else - /* - * Earlier VS; we don't have strtoll(), but we do have - * _strtoi64(). Use that for strtoint64_t(). - */ - #define strtoint64_t _strtoi64 - #endif - - /* - * Microsoft's documentation doesn't speak of LL as a valid - * suffix for 64-bit integers, so we'll just use i64. - */ - #define INT64_T_CONSTANT(constant) (constant##i64) + #define strtoint64_t strtoll #else /* * Non-Microsoft compiler. @@ -201,11 +146,6 @@ * XXX - should we use strtoll or should we use _strtoi64()? */ #define strtoint64_t strtoll - - /* - * Assume LL works. - */ - #define INT64_T_CONSTANT(constant) (constant##LL) #endif #ifdef _MSC_VER @@ -214,16 +154,20 @@ * by adding a preceding underscore; we *want* the UN*Xisms, so add * #defines to let us use them. */ - #define isascii __isascii #define isatty _isatty #define stat _stat - #define strdup _strdup #define open _open - #define fstat _fstat #define read _read #define close _close #define O_RDONLY _O_RDONLY + /* + * We define our_fstat64 as _fstati64, and define our_statb as + * struct _stati64, so we get 64-bit file sizes. + */ + #define our_fstat _fstati64 + #define our_statb struct _stati64 + /* * If has been included, and _DEBUG is defined, and * __STDC__ is zero, will define strdup() to call @@ -233,6 +177,11 @@ #ifndef strdup #define strdup _strdup #endif + + /* + * Windows doesn't have ssize_t; routines such as _read() return int. + */ + typedef int ssize_t; #endif /* _MSC_VER */ /* @@ -242,10 +191,6 @@ #define inline __inline #endif -#if defined(AF_INET6) && !defined(HAVE_OS_IPV6_SUPPORT) -#define HAVE_OS_IPV6_SUPPORT -#endif - #ifndef INET6_ADDRSTRLEN #define INET6_ADDRSTRLEN 46 #endif @@ -257,7 +202,7 @@ #endif #ifndef caddr_t -typedef char* caddr_t; +typedef char *caddr_t; #endif /* caddr_t */ #define MAXHOSTNAMELEN 64 @@ -268,7 +213,6 @@ typedef char* caddr_t; * Includes and definitions for various flavors of UN*X. */ -#include #include #include #include @@ -282,15 +226,16 @@ typedef char* caddr_t; #include /* - * Assume all UN*Xes have strtoll(), and use it for strtoint64_t(). + * We should have large file support enabled, if it's available, + * so just use fstat as our_fstat and struct stat as our_statb. */ -#define strtoint64_t strtoll +#define our_fstat fstat +#define our_statb struct stat /* - * Assume LL works. + * Assume all UN*Xes have strtoll(), and use it for strtoint64_t(). */ -#define INT64_T_CONSTANT(constant) (constant##LL) - +#define strtoint64_t strtoll #endif /* _WIN32 */ /* @@ -298,62 +243,6 @@ typedef char* caddr_t; */ #include "funcattrs.h" -/* - * On Windows, snprintf(), with that name and with C99 behavior - i.e., - * guaranteeing that the formatted string is null-terminated - didn't - * appear until Visual Studio 2015. Prior to that, the C runtime had - * only _snprintf(), which *doesn't* guarantee that the string is - * null-terminated if it is truncated due to the buffer being too - * small. We therefore can't just define snprintf to be _snprintf - * and define vsnprintf to be _vsnprintf, as we're relying on null- - * termination of strings in all cases. - * - * Furthermore, some versions of Visual Studio prior to Visual - * Studio 2015 had vsnprintf() (but not snprintf()!), but those - * versions don't guarantee null termination, either. - * - * We assume all UN*Xes that have snprintf() and vsnprintf() provide - * C99 behavior. - */ -#if defined(_MSC_VER) || defined(__MINGW32__) - #if defined(_MSC_VER) && _MSC_VER >= 1900 - /* - * VS 2015 or newer; just use the C runtime's snprintf() and - * vsnprintf(). - */ - #define nd_snprintf snprintf - #define nd_vsnprintf vsnprintf - #else /* defined(_MSC_VER) && _MSC_VER >= 1900 */ - /* - * VS prior to 2015, or MingGW; assume we have _snprintf_s() and - * _vsnprintf_s(), which guarantee null termination. - */ - #define nd_snprintf(buf, buflen, fmt, ...) \ - _snprintf_s(buf, buflen, _TRUNCATE, fmt, __VA_ARGS__) - #define nd_vsnprintf(buf, buflen, fmt, ap) \ - _vsnprintf_s(buf, buflen, _TRUNCATE, fmt, ap) - #endif /* defined(_MSC_VER) && _MSC_VER >= 1900 */ -#else /* defined(_MSC_VER) || defined(__MINGW32__) */ - /* - * Some other compiler, which we assume to be a UN*X compiler. - * Use the system's snprintf() if we have it, otherwise use - * our own implementation - */ - #ifdef HAVE_SNPRINTF - #define nd_snprintf snprintf - #else /* HAVE_SNPRINTF */ - int nd_snprintf (char *str, size_t sz, FORMAT_STRING(const char *format), ...) - PRINTFLIKE(3, 4); - #endif /* HAVE_SNPRINTF */ - - #ifdef HAVE_VSNPRINTF - #define nd_vsnprintf vsnprintf - #else /* HAVE_VSNPRINTF */ - int nd_vsnprintf (char *str, size_t sz, FORMAT_STRING(const char *format), - va_list ap) PRINTFLIKE(3, 0); - #endif /* HAVE_VSNPRINTF */ -#endif /* defined(_MSC_VER) || defined(__MINGW32__) */ - /* * fopen() read and write modes for text files and binary files. */ @@ -410,28 +299,6 @@ typedef char* caddr_t; } #endif -/* - * If the OS doesn't define AF_INET6 and struct in6_addr: - * - * define AF_INET6, so we can use it internally as a "this is an - * IPv6 address" indication; - * - * define struct in6_addr so that we can use it for IPv6 addresses. - */ -#ifndef HAVE_OS_IPV6_SUPPORT -#ifndef AF_INET6 -#define AF_INET6 24 - -struct in6_addr { - union { - __uint8_t __u6_addr8[16]; - __uint16_t __u6_addr16[8]; - __uint32_t __u6_addr32[4]; - } __u6_addr; /* 128-bit IP6 address */ -}; -#endif -#endif - #ifndef NI_MAXHOST #define NI_MAXHOST 1025 #endif @@ -448,70 +315,6 @@ struct in6_addr { #define FALSE 0 #endif -/* - * The Apple deprecation workaround macros below were adopted from the - * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell. - */ - -#define XSTRINGIFY(x) #x - -/* - * Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8 - */ -#define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y) -#define DIAG_DO_PRAGMA(x) _Pragma (#x) - -/* - * The current clang compilers also define __GNUC__ and __GNUC_MINOR__ - * thus we need to test the clang case before the GCC one - */ -#if defined(__clang__) -# if (__clang_major__ * 100) + __clang_minor__ >= 208 -# define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x) -# define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x)) -# define DIAG_ON(x) DIAG_PRAGMA(pop) -# else -# define DIAG_OFF(x) -# define DIAG_ON(x) -# endif -#elif defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402 -# define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x) -# if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406 -# define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x)) -# define DIAG_ON(x) DIAG_PRAGMA(pop) -# else -# define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x)) -# define DIAG_ON(x) DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x)) -# endif -#else -# define DIAG_OFF(x) -# define DIAG_ON(x) -#endif - -/* Use for clang specific warnings */ -#ifdef __clang__ -# define DIAG_OFF_CLANG(x) DIAG_OFF(x) -# define DIAG_ON_CLANG(x) DIAG_ON(x) -#else -# define DIAG_OFF_CLANG(x) -# define DIAG_ON_CLANG(x) -#endif - -/* - * For dealing with APIs which are only deprecated in OSX (like the OpenSSL API) - */ -#ifdef __APPLE__ -# define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations) -# define USES_APPLE_RST DIAG_ON(deprecated-declarations) -#else -# define USES_APPLE_DEPRECATED_API -# define USES_APPLE_RST -#endif - -/* - * end of Apple deprecation workaround macros - */ - /* * Statement attributes, for various compilers. * @@ -519,8 +322,16 @@ struct in6_addr { * it also implement __has_attribute() (for example, GCC 5.0 and later * have __has_attribute(), and the "fallthrough" attribute was introduced * in GCC 7). + * + * Unfortunately, Clang does this wrong - a statement + * + * __attribute__ ((fallthrough)); + * + * produces bogus -Wmissing-declaration "declaration does not declare + * anything" warnings (dear Clang: that's not a declaration, it's an + * empty statement). GCC, however, has no trouble with this. */ -#if __has_attribute(fallthrough) +#if __has_attribute(fallthrough) && !defined(__clang__) # define ND_FALL_THROUGH __attribute__ ((fallthrough)) #else # define ND_FALL_THROUGH