/* SPDX-License-Identifier: LGPL-2.1-or-later */ #ifndef __NM_STD_AUX_H__ #define __NM_STD_AUX_H__ #include #include #include #include #include #include #include #include /*****************************************************************************/ #define _nm_packed __attribute__((__packed__)) #define _nm_unused __attribute__((__unused__)) #define _nm_always_inline __attribute__((__always_inline__)) #define _nm_used __attribute__((__used__)) #define _nm_pure __attribute__((__pure__)) #define _nm_const __attribute__((__const__)) #define _nm_noreturn __attribute__((__noreturn__)) #define _nm_warn_unused_result __attribute__((__warn_unused_result__)) #define _nm_printf(a, b) __attribute__((__format__(__printf__, a, b))) #define _nm_align(s) __attribute__((__aligned__(s))) #define _nm_section(s) __attribute__((__section__(s))) #define _nm_alignof(type) __alignof(type) #define _nm_alignas(type) _nm_align(_nm_alignof(type)) #define _nm_deprecated(msg) __attribute__((__deprecated__(msg))) #define _nm_retain #if defined(__clang__) && defined(__has_attribute) #if __has_attribute(__retain__) /* __attribute__((__retain__)) is supported in clang 13+, but is warned about * as an unknown attribute in older versions. We assume older versions are used * together with linkers that do not require the attribute. * * Ideally __has_attribute(__retain__) would be checked in other compilers as * well, but it is broken in GCC (bug 99587). Limit it to clang for now, as it * is only known to be needed for linking lld. */ #undef _nm_retain #define _nm_retain __attribute__((__retain__)) #endif #endif #if defined(__clang__) /* Clang can emit -Wunused-but-set-variable warning for cleanup variables * that are only assigned (never used otherwise). Hack around */ #define _nm_auto_extra _nm_unused #else #define _nm_auto_extra #endif #define nm_auto(fcn) _nm_auto_extra __attribute__((__cleanup__(fcn))) #define _nm_nil /* This is required to make LTO working. * * See https://gitlab.freedesktop.org/NetworkManager/NetworkManager/merge_requests/76#note_112694 * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48200#c28 */ #ifndef __clang__ #define _nm_externally_visible __attribute__((__externally_visible__)) #else #define _nm_externally_visible #endif #if __GNUC__ >= 7 #define _nm_fallthrough __attribute__((__fallthrough__)) #else #define _nm_fallthrough #endif /*****************************************************************************/ /* This is mainly used in case of failed assertions. Usually assert() itself * already ensures that the code path is marked as unreachable, however with * NDEBUG that might not be the case. We want to mark the code as unreachable * even with NDEBUG/G_DISABLE_ASSERT. */ #define _nm_unreachable_code() __builtin_unreachable() /*****************************************************************************/ #ifndef _NM_CC_SUPPORT_AUTO_TYPE #if (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9))) #define _NM_CC_SUPPORT_AUTO_TYPE 1 #else #define _NM_CC_SUPPORT_AUTO_TYPE 0 #endif #endif #if _NM_CC_SUPPORT_AUTO_TYPE #define _nm_auto_type __auto_type #endif #ifndef _NM_CC_SUPPORT_GENERIC /* In the meantime, NetworkManager requires C11 and _Generic() should always be available. * However, shared/nm-utils may also be used in VPN/applet, which possibly did not yet * bump the C standard requirement. Leave this for the moment, but eventually we can * drop it. * * Technically, gcc 4.9 already has some support for _Generic(). But there seems * to be issues with propagating "const char *[5]" to "const char **". Only assume * we have _Generic() since gcc 5. */ #if (defined(__GNUC__) && __GNUC__ >= 5) || (defined(__clang__)) #define _NM_CC_SUPPORT_GENERIC 1 #else #define _NM_CC_SUPPORT_GENERIC 0 #endif #endif /*****************************************************************************/ #ifdef __CHECKER__ #define _nm_bitwise __attribute__((__bitwise__)) #define _nm_force __attribute__((__force__)) #else #define _nm_bitwise #define _nm_force #endif typedef uint16_t _nm_bitwise nm_le16_t; typedef uint16_t _nm_bitwise nm_be16_t; typedef uint32_t _nm_bitwise nm_le32_t; typedef uint32_t _nm_bitwise nm_be32_t; typedef uint64_t _nm_bitwise nm_le64_t; typedef uint64_t _nm_bitwise nm_be64_t; /*****************************************************************************/ #ifdef thread_local #define _nm_thread_local thread_local /* * Don't break on glibc < 2.16 that doesn't define __STDC_NO_THREADS__ * see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53769 */ #elif __STDC_VERSION__ >= 201112L \ && !(defined(__STDC_NO_THREADS__) \ || (defined(__GNU_LIBRARY__) && __GLIBC__ == 2 && __GLIBC_MINOR__ < 16)) #define _nm_thread_local _Thread_local #else #define _nm_thread_local __thread #endif /*****************************************************************************/ #define _NM_DUMMY_STRUCT_FOR_TRAILING_SEMICOLON struct _nm_dummy_struct_for_trailing_semicolon /*****************************************************************************/ #define NM_BIT(n) (1ull << (n)) /*****************************************************************************/ #define NM_PASTE_ARGS(identifier1, identifier2) identifier1##identifier2 #define NM_PASTE(identifier1, identifier2) NM_PASTE_ARGS(identifier1, identifier2) /* Taken from systemd's UNIQ_T and UNIQ macros. */ #define NM_UNIQ_T(x, uniq) NM_PASTE(__unique_prefix_, NM_PASTE(x, uniq)) #define NM_UNIQ __COUNTER__ /*****************************************************************************/ /* NM_BOOLEAN_EXPR(expr) exists to ensure that there is still a compiler * warning when accidentally(?) using assignments like `NM_BOOLEAN_EXPR(x = 1)` * Compiler will warn about that and suggest either == or additional parentheses * `NM_BOOLEAN_EXPR((x = 1))`. * * This also is true for users of this macro, like `NM_LIKELY(x = 1)` and further * up `nm_assert(x = 1)`. Those users must make sure not themselves adding additional * parentheses around the condition. */ #define _NM_BOOLEAN_EXPR_IMPL(v, expr) \ ({ \ int NM_UNIQ_T(V, v); \ \ if (expr) \ NM_UNIQ_T(V, v) = 1; \ else \ NM_UNIQ_T(V, v) = 0; \ NM_UNIQ_T(V, v); \ }) #if defined(__GNUC__) && (__GNUC__ > 4) #define NM_BOOLEAN_EXPR(expr) \ __builtin_choose_expr(__builtin_constant_p(expr), \ (!!(expr)), \ _NM_BOOLEAN_EXPR_IMPL(NM_UNIQ, expr)) #else #define NM_BOOLEAN_EXPR(expr) (!!(expr)) #endif #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) #define NM_LIKELY(expr) __builtin_expect(NM_BOOLEAN_EXPR(expr), 1) #define NM_UNLIKELY(expr) __builtin_expect(NM_BOOLEAN_EXPR(expr), 0) #else #define NM_LIKELY(expr) NM_BOOLEAN_EXPR(expr) #define NM_UNLIKELY(expr) NM_BOOLEAN_EXPR(expr) #endif /*****************************************************************************/ /* glib/C provides the following kind of assertions: * - assert() -- disable with NDEBUG * - g_return_if_fail() -- disable with G_DISABLE_CHECKS * - g_assert() -- disable with G_DISABLE_ASSERT * but they are all enabled by default and usually even production builds have * these kind of assertions enabled. It also means, that disabling assertions * is an untested configuration, and might have bugs. * * Add our own assertion macro nm_assert(), which is disabled by default and must * be explicitly enabled. They are useful for more expensive checks or checks that * depend less on runtime conditions (that is, are generally expected to be true). */ #ifndef NM_MORE_ASSERTS #define NM_MORE_ASSERTS 0 #endif #ifndef NDEBUG #define _NM_ASSERT_FAIL_ENABLED 1 #define _nm_assert_fail(msg) \ __assert_fail(((NM_MORE_ASSERTS) ? "" msg "" : ""), \ __FILE__, \ __LINE__, \ ((NM_MORE_ASSERTS) ? __func__ : "")) #else #define _NM_ASSERT_FAIL_ENABLED 0 #define _nm_assert_fail(msg) ((void) ("" msg ""), _nm_unreachable_code()) #endif #define NM_MORE_ASSERTS_EFFECTIVE (_NM_ASSERT_FAIL_ENABLED ? NM_MORE_ASSERTS : 0) #define nm_assert(cond) \ ({ \ /* nm_assert() must do *nothing* of effect, except evaluating * @cond (0 or 1 times). * * As such, nm_assert() is async-signal-safe (provided @cond is, and * the assertion does not fail). */ \ if (NM_MORE_ASSERTS_EFFECTIVE == 0) { \ if (__builtin_constant_p(cond) && !(cond)) { \ /* Constant expressions are still evaluated and result * in unreachable code. This handles nm_assert(FALSE). */ \ _nm_unreachable_code(); \ } \ /* pass */ \ } else if (NM_LIKELY(cond)) { \ /* pass */ \ } else { \ _nm_assert_fail(#cond); \ } \ 1; \ }) #define nm_assert_se(cond) \ ({ \ /* nm_assert() must do *nothing* of effect, except evaluating * @cond (exactly 1 times). * * As such, nm_assert() is async-signal-safe (provided @cond is, and * the assertion does not fail). */ \ if (NM_LIKELY(cond)) { \ /* pass */ \ } else { \ if (NM_MORE_ASSERTS_EFFECTIVE != 0) { \ _nm_assert_fail(#cond); \ } \ _nm_unreachable_code(); \ } \ 1; \ }) #define nm_assert_not_reached() \ ({ \ _nm_assert_fail("unreachable"); \ 1; \ }) /* This is similar nm_assert_not_reached(), but it's supposed to be used only during * development. Like _XXX_ comments, they can be used as a marker that something still * needs to be done. */ #define XXX(msg) \ ({ \ _nm_assert_fail("X" \ "XX error: " msg ""); \ 1; \ }) #define nm_assert_unreachable_val(val) \ ({ \ _nm_assert_fail("unreachable value " #val); \ (val); \ }) #define NM_STATIC_ASSERT(cond) static_assert(cond, "") #define NM_STATIC_ASSERT_EXPR_1(cond) \ (!!sizeof(struct { unsigned __static_assert_expr_1 : ((cond) ? 2 : -1); })) #define NM_STATIC_ASSERT_EXPR_VOID(cond) ((void) NM_STATIC_ASSERT_EXPR_1(cond)) /*****************************************************************************/ #define NM_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0])) /*****************************************************************************/ #define nm_offsetof(t, m) offsetof(t, m) #define nm_offsetofend(t, m) (nm_offsetof(t, m) + sizeof(((t *) NULL)->m)) /*****************************************************************************/ /* This does a compile time check that "type" is a suitable C type. It either * returns a compile time constant of 1 or it fails compilation. The point * is only in macros to check that a macro parameter (what we might pass to * sizeof() is really a type, and not a variable. */ #define NM_ENSURE_IS_TYPE(type) (sizeof(void (*)(type[])) == sizeof(void (*)(void *))) /*****************************************************************************/ #if _NM_CC_SUPPORT_GENERIC /* returns @value, if the type of @value matches @type. * This requires support for C11 _Generic(). If no support is * present, this returns @value directly. * * It's useful to check the let the compiler ensure that @value is * of a certain type. */ #define _NM_ENSURE_TYPE(type, value) (_Generic((value), type : (value))) #define _NM_ENSURE_TYPE_CONST(type, value) \ (_Generic((value), const type : ((const type)(value)), type : ((const type)(value)))) #else #define _NM_ENSURE_TYPE(type, value) (value) #define _NM_ENSURE_TYPE_CONST(type, value) ((const type)(value)) #endif /* returns void, but does a compile time check that the argument is a pointer * (that is, can be converted to (const void *)). It does not actually evaluate * (value). That means, it's also safe to call _NM_ENSURE_POINTER(array[0]) if * array might be NULL. It's also safe to call on a macro argument that is * supposed to be evaluate at most once (this macro will not "execute" the * argument). */ #define _NM_ENSURE_POINTER(value) \ do { \ _nm_unused const void *const _unused_for_type_check = 0 ? (value) : NULL; \ } while (0) #if _NM_CC_SUPPORT_GENERIC && (!defined(__clang__) || __clang_major__ > 3) #define NM_STRUCT_OFFSET_ENSURE_TYPE(type, container, field) \ (_Generic((&(((container *) NULL)->field))[0], type : nm_offsetof(container, field))) #else #define NM_STRUCT_OFFSET_ENSURE_TYPE(type, container, field) nm_offsetof(container, field) #endif /*****************************************************************************/ static inline uint32_t nm_add_clamped_u32(uint32_t a, uint32_t b) { uint32_t c; /* returns a+b, or UINT32_MAX if the result would overflow. */ c = a + b; if (c < a) return UINT32_MAX; return c; } static inline unsigned nm_mult_clamped_u(unsigned a, unsigned b) { unsigned c; /* returns a*b, or UINT_MAX if the result would overflow. */ if (b == 0) return 0; c = a * b; if (c / b != a) return (unsigned) -1; return c; } /* glib's MIN()/MAX() macros don't have function-like behavior, in that they evaluate * the argument possibly twice. * * Taken from systemd's MIN()/MAX() macros. */ #define NM_MIN(a, b) __NM_MIN(NM_UNIQ, a, NM_UNIQ, b) #define __NM_MIN(aq, a, bq, b) \ ({ \ typeof(a) NM_UNIQ_T(A, aq) = (a); \ typeof(b) NM_UNIQ_T(B, bq) = (b); \ ((NM_UNIQ_T(A, aq) < NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \ }) #define NM_MAX(a, b) __NM_MAX(NM_UNIQ, a, NM_UNIQ, b) #define __NM_MAX(aq, a, bq, b) \ ({ \ typeof(a) NM_UNIQ_T(A, aq) = (a); \ typeof(b) NM_UNIQ_T(B, bq) = (b); \ ((NM_UNIQ_T(A, aq) > NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \ }) #define NM_CLAMP(x, low, high) __NM_CLAMP(NM_UNIQ, x, NM_UNIQ, low, NM_UNIQ, high) #define __NM_CLAMP(xq, x, lowq, low, highq, high) \ ({ \ typeof(x) NM_UNIQ_T(X, xq) = (x); \ typeof(low) NM_UNIQ_T(LOW, lowq) = (low); \ typeof(high) NM_UNIQ_T(HIGH, highq) = (high); \ \ ((NM_UNIQ_T(X, xq) > NM_UNIQ_T(HIGH, highq)) ? NM_UNIQ_T(HIGH, highq) \ : (NM_UNIQ_T(X, xq) < NM_UNIQ_T(LOW, lowq)) ? NM_UNIQ_T(LOW, lowq) \ : NM_UNIQ_T(X, xq)); \ }) #define NM_MAX_WITH_CMP(cmp, a, b) \ ({ \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ (((cmp(_a, _b)) >= 0) ? _a : _b); \ }) /* evaluates to (void) if _A or _B are not constant or of different types */ #define NM_CONST_MAX(_A, _B) \ (__builtin_choose_expr((__builtin_constant_p(_A) && __builtin_constant_p(_B) \ && __builtin_types_compatible_p(typeof(_A), typeof(_B))), \ ((_A) > (_B)) ? (_A) : (_B), \ ((void) 0))) /* Determine whether @x is a power of two (@x being an integer type). * Basically, this returns TRUE, if @x has exactly one bit set. * For negative values and zero, this always returns FALSE. */ #define nm_utils_is_power_of_two(x) \ ({ \ typeof(x) _x2 = (x); \ const typeof(_x2) _X_0 = ((typeof(_x2)) 0); \ const typeof(_x2) _X_1 = ((typeof(_x2)) 1); \ \ ((_x2 > _X_0) && ((_x2 & (_x2 - _X_1)) == _X_0)); \ }) #define nm_utils_is_power_of_two_or_zero(x) \ ({ \ typeof(x) _x1 = (x); \ \ ((_x1 == 0) || nm_utils_is_power_of_two(_x1)); \ }) /*****************************************************************************/ static inline size_t NM_ALIGN_TO(size_t l, size_t ali) { nm_assert(nm_utils_is_power_of_two(ali)); if (l > SIZE_MAX - (ali - 1)) return SIZE_MAX; /* indicate overflow */ return ((l + ali - 1) & ~(ali - 1)); } #define NM_ALIGN4(l) NM_ALIGN_TO(l, 4) #define NM_ALIGN8(l) NM_ALIGN_TO(l, 8) #define NM_ALIGN(l) NM_ALIGN_TO(l, sizeof(void *)) #define NM_ALIGN_PTR(p) ((void *) NM_ALIGN((uintptr_t) (p))) /*****************************************************************************/ #define NM_SWAP(p_a, p_b) \ do { \ typeof(*(p_a)) *const _p_a = (p_a); \ typeof(*(p_a)) *const _p_b = (p_b); \ typeof(*(p_a)) _tmp; \ \ _tmp = *_p_a; \ *_p_a = *_p_b; \ *_p_b = _tmp; \ } while (0) /*****************************************************************************/ /* macro to return strlen() of a compile time string. */ #define NM_STRLEN(str) (sizeof("" str "") - 1u) static inline size_t _nm_ptrarray_len_impl(const void *const *array) { size_t n = 0; if (array) { while (array[n]) n++; } return n; } /* returns the length of a NULL terminated array of pointers, * like g_strv_length() does. The difference is: * - it operates on arrays of pointers (of any kind, requiring no cast). * - it accepts NULL to return zero. */ #define NM_PTRARRAY_LEN(array) \ ({ \ _NM_ENSURE_POINTER((array)[0]); \ _nm_ptrarray_len_impl((const void *const *) (array)); \ }) /*****************************************************************************/ static inline int nm_strcmp0(const char *s1, const char *s2) { int c; /* like g_strcmp0(), but this is inlinable. * * Also, it is guaranteed to return either -1, 0, or 1. */ if (s1 == s2) return 0; if (!s1) return -1; if (!s2) return 1; c = strcmp(s1, s2); if (c < 0) return -1; if (c > 0) return 1; return 0; } static inline int nm_streq(const char *s1, const char *s2) { return strcmp(s1, s2) == 0; } static inline int nm_streq0(const char *s1, const char *s2) { return (s1 == s2) || (s1 && s2 && strcmp(s1, s2) == 0); } static inline int nm_memcmp(const void *s1, const void *s2, size_t n) { /* Workaround undefined behavior in memcmp() with NULL pointers. */ if (n == 0) return 0; nm_assert(s1); nm_assert(s2); return memcmp(s1, s2, n); } static inline bool nm_memeq(const void *s1, const void *s2, size_t len) { return nm_memcmp(s1, s2, len) == 0; } static inline void * nm_memcpy(void *restrict dest, const void *restrict src, size_t n) { /* Workaround undefined behavior in memcpy() with NULL pointers. */ if (n == 0) return dest; nm_assert(src); return memcpy(dest, src, n); } /* * Very similar to g_str_has_prefix() with the obvious meaning. * Differences: * 1) prefix is enforced to be a C string literal * (it is thus more restricted, but you'll know it at compile time). * 2) it accepts str==NULL * (it is thus more forgiving than g_str_has_prefix()) * 3) it can get the job done with one strncmp() (with * the length argument being a compile time constant, and compiler optimizing * strncmp() call). * Compare to g_str_has_prefix() which requires one call into glib, then * one strlen() and one strncmp() call. * * If it compiles (re:1), NM_STR_HAS_PREFIX() can fully replace g_str_has_prefix(). * The other way is not necessarily possible due to 2). */ #define NM_STR_HAS_PREFIX(str, prefix) \ ({ \ const char *const _str_has_prefix = (str); \ \ nm_assert(strlen(prefix) == NM_STRLEN(prefix)); \ \ _str_has_prefix && (strncmp(_str_has_prefix, "" prefix "", NM_STRLEN(prefix)) == 0); \ }) /* * Very similar to g_str_has_suffix() with the obvious meaning. * Differences: * 1) suffix is enforced to be a C string literal * (it is thus more restricted, but you'll know it at compile time). * 2) it accepts str==NULL * (it is thus more forgiving than g_str_has_suffix()) * 3) it can get the job done with one strlen() and one memcpy() call (with * the length argument being a compile time constant, and compiler optimizing * memcpy() call). * Compare to g_str_has_suffix() which requires one call into glib, then * two strlen() and one strcmp() call. * * If it compiles (re:1), NM_STR_HAS_SUFFIX() can fully replace g_str_has_suffix(). * The other way is not necessarily possible due to 2). */ #define NM_STR_HAS_SUFFIX(str, suffix) \ ({ \ const char *const _str_has_suffix = (str); \ size_t _l; \ \ nm_assert(strlen(suffix) == NM_STRLEN(suffix)); \ \ (_str_has_suffix && ((_l = strlen(_str_has_suffix)) >= NM_STRLEN(suffix)) \ && (memcmp(&_str_has_suffix[_l - NM_STRLEN(suffix)], "" suffix "", NM_STRLEN(suffix)) \ == 0)); \ }) /* whether @str starts with the string literal @prefix and is followed by * some other text. It is like NM_STR_HAS_PREFIX() && !nm_streq() together. */ #define NM_STR_HAS_PREFIX_WITH_MORE(str, prefix) \ ({ \ const char *const _str_has_prefix_with_more = (str); \ \ NM_STR_HAS_PREFIX(_str_has_prefix_with_more, "" prefix "") \ &&_str_has_prefix_with_more[NM_STRLEN(prefix)] != '\0'; \ }) #define NM_STR_HAS_SUFFIX_WITH_MORE(str, suffix) \ ({ \ const char *const _str_has_suffix = (str); \ size_t _l; \ \ nm_assert(strlen(suffix) == NM_STRLEN(suffix)); \ \ (_str_has_suffix && ((_l = strlen(_str_has_suffix)) > NM_STRLEN(suffix)) \ && (memcmp(&_str_has_suffix[_l - NM_STRLEN(suffix)], "" suffix "", NM_STRLEN(suffix)) \ == 0)); \ }) /*****************************************************************************/ /* clang-format off */ #define _NM_MACRO_SELECT_ARG_120(_empty, \ _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, \ _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, \ _21, _22, _23, _24, _25, _26, _27, _28, _29, _30, \ _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, \ _41, _42, _43, _44, _45, _46, _47, _48, _49, _50, \ _51, _52, _53, _54, _55, _56, _57, _58, _59, _60, \ _61, _62, _63, _64, _65, _66, _67, _68, _69, _70, \ _71, _72, _73, _74, _75, _76, _77, _78, _79, _80, \ _81, _82, _83, _84, _85, _86, _87, _88, _89, _90, \ _91, _92, _93, _94, _95, _96, _97, _98, _99, _100, \ _101, _102, _103, _104, _105, _106, _107, _108, _109, _110, \ _111, _112, _113, _114, _115, _116, _117, _118, _119, _120, \ N, \ ...) \ N #define NM_NARG(...) \ _NM_MACRO_SELECT_ARG_120(, ##__VA_ARGS__, \ 120, \ 119, 118, 117, 116, 115, 114, 113, 112, 111, 110, \ 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, \ 99, 98, 97, 96, 95, 94, 93, 92, 91, 90, \ 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, \ 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, \ 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, \ 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, \ 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, \ 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, \ 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, \ 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, \ 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) #define NM_NARG_MAX1(...) \ _NM_MACRO_SELECT_ARG_120(, ##__VA_ARGS__, \ 1, \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 110 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 100 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 90 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 */ \ 1, 1, 1, 1, 1, 1, 1, 1, 1, 0) #define NM_NARG_MAX2(...) \ _NM_MACRO_SELECT_ARG_120(, ##__VA_ARGS__, \ 2, \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 110 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 100 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 90 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 80 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 70 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 60 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 50 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 40 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 30 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 20 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 10 */ \ 2, 2, 2, 2, 2, 2, 2, 2, 1, 0) /* clang-format on */ /*****************************************************************************/ #define _NM_MACRO_IDENTITY(...) __VA_ARGS__ #define _NM_MACRO_SELECT_FIRST(...) _NM_MACRO_SELECT_FIRST_IMPL(__VA_ARGS__, throwaway) #define _NM_MACRO_SELECT_FIRST_IMPL(first, ...) first #define _NM_MACRO_CALL(macro, ...) macro(__VA_ARGS__) #define _NM_MACRO_CALL2(macro, ...) macro(__VA_ARGS__) /*****************************************************************************/ /* clang-format off */ #define _NM_VA_ARGS_FOREACH_0( prefix, postfix, sep, op, op_arg) #define _NM_VA_ARGS_FOREACH_1( prefix, postfix, sep, op, op_arg, x) prefix _NM_MACRO_CALL2(op, x, 0, op_arg) postfix #define _NM_VA_ARGS_FOREACH_2( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 1, op_arg) postfix sep _NM_VA_ARGS_FOREACH_1( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_3( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 2, op_arg) postfix sep _NM_VA_ARGS_FOREACH_2( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_4( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 3, op_arg) postfix sep _NM_VA_ARGS_FOREACH_3( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_5( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 4, op_arg) postfix sep _NM_VA_ARGS_FOREACH_4( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_6( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 5, op_arg) postfix sep _NM_VA_ARGS_FOREACH_5( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_7( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 6, op_arg) postfix sep _NM_VA_ARGS_FOREACH_6( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_8( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 7, op_arg) postfix sep _NM_VA_ARGS_FOREACH_7( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_9( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 8, op_arg) postfix sep _NM_VA_ARGS_FOREACH_8( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_10( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 9, op_arg) postfix sep _NM_VA_ARGS_FOREACH_9( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_11( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 10, op_arg) postfix sep _NM_VA_ARGS_FOREACH_10( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_12( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 11, op_arg) postfix sep _NM_VA_ARGS_FOREACH_11( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_13( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 12, op_arg) postfix sep _NM_VA_ARGS_FOREACH_12( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_14( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 13, op_arg) postfix sep _NM_VA_ARGS_FOREACH_13( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_15( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 14, op_arg) postfix sep _NM_VA_ARGS_FOREACH_14( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_16( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 15, op_arg) postfix sep _NM_VA_ARGS_FOREACH_15( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_17( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 16, op_arg) postfix sep _NM_VA_ARGS_FOREACH_16( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_18( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 17, op_arg) postfix sep _NM_VA_ARGS_FOREACH_17( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_19( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 18, op_arg) postfix sep _NM_VA_ARGS_FOREACH_18( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_20( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 19, op_arg) postfix sep _NM_VA_ARGS_FOREACH_19( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_21( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 20, op_arg) postfix sep _NM_VA_ARGS_FOREACH_20( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_22( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 21, op_arg) postfix sep _NM_VA_ARGS_FOREACH_21( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_23( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 22, op_arg) postfix sep _NM_VA_ARGS_FOREACH_22( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_24( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 23, op_arg) postfix sep _NM_VA_ARGS_FOREACH_23( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_25( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 24, op_arg) postfix sep _NM_VA_ARGS_FOREACH_24( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_26( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 25, op_arg) postfix sep _NM_VA_ARGS_FOREACH_25( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_27( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 26, op_arg) postfix sep _NM_VA_ARGS_FOREACH_26( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_28( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 27, op_arg) postfix sep _NM_VA_ARGS_FOREACH_27( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_29( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 28, op_arg) postfix sep _NM_VA_ARGS_FOREACH_28( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_30( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 29, op_arg) postfix sep _NM_VA_ARGS_FOREACH_29( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_31( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 30, op_arg) postfix sep _NM_VA_ARGS_FOREACH_30( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_32( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 31, op_arg) postfix sep _NM_VA_ARGS_FOREACH_31( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_33( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 32, op_arg) postfix sep _NM_VA_ARGS_FOREACH_32( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_34( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 33, op_arg) postfix sep _NM_VA_ARGS_FOREACH_33( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_35( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 34, op_arg) postfix sep _NM_VA_ARGS_FOREACH_34( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_36( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 35, op_arg) postfix sep _NM_VA_ARGS_FOREACH_35( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_37( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 36, op_arg) postfix sep _NM_VA_ARGS_FOREACH_36( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_38( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 37, op_arg) postfix sep _NM_VA_ARGS_FOREACH_37( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_39( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 38, op_arg) postfix sep _NM_VA_ARGS_FOREACH_38( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_40( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 39, op_arg) postfix sep _NM_VA_ARGS_FOREACH_39( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_41( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 40, op_arg) postfix sep _NM_VA_ARGS_FOREACH_40( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_42( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 41, op_arg) postfix sep _NM_VA_ARGS_FOREACH_41( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_43( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 42, op_arg) postfix sep _NM_VA_ARGS_FOREACH_42( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_44( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 43, op_arg) postfix sep _NM_VA_ARGS_FOREACH_43( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_45( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 44, op_arg) postfix sep _NM_VA_ARGS_FOREACH_44( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_46( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 45, op_arg) postfix sep _NM_VA_ARGS_FOREACH_45( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_47( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 46, op_arg) postfix sep _NM_VA_ARGS_FOREACH_46( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_48( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 47, op_arg) postfix sep _NM_VA_ARGS_FOREACH_47( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_49( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 48, op_arg) postfix sep _NM_VA_ARGS_FOREACH_48( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_50( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 49, op_arg) postfix sep _NM_VA_ARGS_FOREACH_49( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_51( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 50, op_arg) postfix sep _NM_VA_ARGS_FOREACH_50( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_52( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 51, op_arg) postfix sep _NM_VA_ARGS_FOREACH_51( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_53( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 52, op_arg) postfix sep _NM_VA_ARGS_FOREACH_52( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_54( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 53, op_arg) postfix sep _NM_VA_ARGS_FOREACH_53( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_55( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 54, op_arg) postfix sep _NM_VA_ARGS_FOREACH_54( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_56( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 55, op_arg) postfix sep _NM_VA_ARGS_FOREACH_55( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_57( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 56, op_arg) postfix sep _NM_VA_ARGS_FOREACH_56( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_58( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 57, op_arg) postfix sep _NM_VA_ARGS_FOREACH_57( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_59( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 58, op_arg) postfix sep _NM_VA_ARGS_FOREACH_58( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_60( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 59, op_arg) postfix sep _NM_VA_ARGS_FOREACH_59( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_61( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 10, op_arg) postfix sep _NM_VA_ARGS_FOREACH_60( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_62( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 61, op_arg) postfix sep _NM_VA_ARGS_FOREACH_61( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_63( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 62, op_arg) postfix sep _NM_VA_ARGS_FOREACH_62( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_64( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 63, op_arg) postfix sep _NM_VA_ARGS_FOREACH_63( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_65( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 64, op_arg) postfix sep _NM_VA_ARGS_FOREACH_64( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_66( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 65, op_arg) postfix sep _NM_VA_ARGS_FOREACH_65( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_67( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 66, op_arg) postfix sep _NM_VA_ARGS_FOREACH_66( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_68( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 67, op_arg) postfix sep _NM_VA_ARGS_FOREACH_67( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_69( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 68, op_arg) postfix sep _NM_VA_ARGS_FOREACH_68( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_70( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 69, op_arg) postfix sep _NM_VA_ARGS_FOREACH_69( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_71( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 70, op_arg) postfix sep _NM_VA_ARGS_FOREACH_70( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_72( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 71, op_arg) postfix sep _NM_VA_ARGS_FOREACH_71( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_73( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 72, op_arg) postfix sep _NM_VA_ARGS_FOREACH_72( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_74( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 73, op_arg) postfix sep _NM_VA_ARGS_FOREACH_73( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_75( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 74, op_arg) postfix sep _NM_VA_ARGS_FOREACH_74( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_76( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 75, op_arg) postfix sep _NM_VA_ARGS_FOREACH_75( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_77( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 76, op_arg) postfix sep _NM_VA_ARGS_FOREACH_76( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_78( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 77, op_arg) postfix sep _NM_VA_ARGS_FOREACH_77( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_79( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 78, op_arg) postfix sep _NM_VA_ARGS_FOREACH_78( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_80( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 79, op_arg) postfix sep _NM_VA_ARGS_FOREACH_79( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_81( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 80, op_arg) postfix sep _NM_VA_ARGS_FOREACH_80( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_82( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 81, op_arg) postfix sep _NM_VA_ARGS_FOREACH_81( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_83( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 82, op_arg) postfix sep _NM_VA_ARGS_FOREACH_82( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_84( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 83, op_arg) postfix sep _NM_VA_ARGS_FOREACH_83( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_85( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 84, op_arg) postfix sep _NM_VA_ARGS_FOREACH_84( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_86( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 85, op_arg) postfix sep _NM_VA_ARGS_FOREACH_85( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_87( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 86, op_arg) postfix sep _NM_VA_ARGS_FOREACH_86( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_88( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 87, op_arg) postfix sep _NM_VA_ARGS_FOREACH_87( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_89( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 88, op_arg) postfix sep _NM_VA_ARGS_FOREACH_88( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_90( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 89, op_arg) postfix sep _NM_VA_ARGS_FOREACH_89( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_91( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 90, op_arg) postfix sep _NM_VA_ARGS_FOREACH_90( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_92( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 91, op_arg) postfix sep _NM_VA_ARGS_FOREACH_91( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_93( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 92, op_arg) postfix sep _NM_VA_ARGS_FOREACH_92( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_94( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 93, op_arg) postfix sep _NM_VA_ARGS_FOREACH_93( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_95( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 94, op_arg) postfix sep _NM_VA_ARGS_FOREACH_94( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_96( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 95, op_arg) postfix sep _NM_VA_ARGS_FOREACH_95( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_97( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 96, op_arg) postfix sep _NM_VA_ARGS_FOREACH_96( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_98( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 97, op_arg) postfix sep _NM_VA_ARGS_FOREACH_97( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_99( prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 98, op_arg) postfix sep _NM_VA_ARGS_FOREACH_98( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_100(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 99, op_arg) postfix sep _NM_VA_ARGS_FOREACH_99( prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_101(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 100, op_arg) postfix sep _NM_VA_ARGS_FOREACH_100(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_102(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 101, op_arg) postfix sep _NM_VA_ARGS_FOREACH_101(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_103(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 102, op_arg) postfix sep _NM_VA_ARGS_FOREACH_102(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_104(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 103, op_arg) postfix sep _NM_VA_ARGS_FOREACH_103(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_105(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 104, op_arg) postfix sep _NM_VA_ARGS_FOREACH_104(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_106(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 105, op_arg) postfix sep _NM_VA_ARGS_FOREACH_105(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_107(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 106, op_arg) postfix sep _NM_VA_ARGS_FOREACH_106(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_108(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 107, op_arg) postfix sep _NM_VA_ARGS_FOREACH_107(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_109(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 108, op_arg) postfix sep _NM_VA_ARGS_FOREACH_108(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_110(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 109, op_arg) postfix sep _NM_VA_ARGS_FOREACH_109(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_111(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 100, op_arg) postfix sep _NM_VA_ARGS_FOREACH_110(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_112(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 111, op_arg) postfix sep _NM_VA_ARGS_FOREACH_111(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_113(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 112, op_arg) postfix sep _NM_VA_ARGS_FOREACH_112(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_114(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 113, op_arg) postfix sep _NM_VA_ARGS_FOREACH_113(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_115(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 114, op_arg) postfix sep _NM_VA_ARGS_FOREACH_114(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_116(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 115, op_arg) postfix sep _NM_VA_ARGS_FOREACH_115(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_117(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 116, op_arg) postfix sep _NM_VA_ARGS_FOREACH_116(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_118(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 117, op_arg) postfix sep _NM_VA_ARGS_FOREACH_117(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_119(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 118, op_arg) postfix sep _NM_VA_ARGS_FOREACH_118(prefix, postfix, sep, op, op_arg, __VA_ARGS__) #define _NM_VA_ARGS_FOREACH_120(prefix, postfix, sep, op, op_arg, x, ...) prefix _NM_MACRO_CALL2(op, x, 119, op_arg) postfix sep _NM_VA_ARGS_FOREACH_119(prefix, postfix, sep, op, op_arg, __VA_ARGS__) /* clang-format on */ #define NM_VA_ARGS_FOREACH(prefix, postfix, sep, op, op_arg, ...) \ _NM_MACRO_CALL(NM_PASTE(_NM_VA_ARGS_FOREACH_, NM_NARG(__VA_ARGS__)), \ prefix, \ postfix, \ sep, \ op, \ op_arg, \ ##__VA_ARGS__) /*****************************************************************************/ #define NM_VA_ARGS_JOIN(sep, ...) NM_VA_ARGS_FOREACH(, , sep, _NM_MACRO_SELECT_FIRST, , __VA_ARGS__) /*****************************************************************************/ #define _NM_IN_SET_OP(x, idx, uniq) ((int) (NM_UNIQ_T(xx, uniq) == (x))) #define _NM_IN_SET(uniq, op, type, x, ...) \ ({ \ type NM_UNIQ_T(xx, uniq) = (x); \ \ /* trigger a -Wenum-compare warning */ \ nm_assert(true || NM_UNIQ_T(xx, uniq) == (x)); \ \ !!(NM_VA_ARGS_FOREACH(, , op, _NM_IN_SET_OP, uniq, __VA_ARGS__)); \ }) /* Beware that this does short-circuit evaluation (use "||" instead of "|") * which has a possibly unexpected non-function-like behavior. * Use NM_IN_SET_SE if you need all arguments to be evaluated. */ #define NM_IN_SET(x, ...) _NM_IN_SET(NM_UNIQ, ||, typeof(x), x, __VA_ARGS__) /* "SE" stands for "side-effect". Contrary to NM_IN_SET(), this does not do * short-circuit evaluation, which can make a difference if the arguments have * side-effects. */ #define NM_IN_SET_SE(x, ...) _NM_IN_SET(NM_UNIQ, |, typeof(x), x, __VA_ARGS__) /* the *_TYPED forms allow to explicitly select the type of "x". This is useful * if "x" doesn't support typeof (bitfields) or you want to gracefully convert * a type using automatic type conversion rules (but not forcing the conversion * with a cast). */ #define NM_IN_SET_TYPED(type, x, ...) _NM_IN_SET(NM_UNIQ, ||, type, x, __VA_ARGS__) #define NM_IN_SET_SE_TYPED(type, x, ...) _NM_IN_SET(NM_UNIQ, |, type, x, __VA_ARGS__) /*****************************************************************************/ static inline int _NM_IN_STRSET_EVAL_op_streq(const char *x1, const char *x) { return x && nm_streq(x1, x); } #define _NM_IN_STRSET_EVAL_OP_NULL(x, idx, op_arg) ((int) (((const char *) NULL) == (x))) #define _NM_IN_STRSET_EVAL_OP_STREQ(x, idx, op_arg) _NM_IN_STRSET_EVAL_op_streq(_x1, x) #define _NM_IN_STRSET_EVAL(op, eval_op, x1, ...) \ ({ \ const char *const _x1 = (x1); \ \ !!(_x1 ? (NM_VA_ARGS_FOREACH(, , op, eval_op, , __VA_ARGS__)) \ : (NM_VA_ARGS_FOREACH(, , op, _NM_IN_STRSET_EVAL_OP_NULL, , __VA_ARGS__))); \ }) /* Beware that this does short-circuit evaluation (use "||" instead of "|") * which has a possibly unexpected non-function-like behavior. * Use NM_IN_STRSET_SE if you need all arguments to be evaluated. */ #define NM_IN_STRSET(x1, ...) _NM_IN_STRSET_EVAL(||, _NM_IN_STRSET_EVAL_OP_STREQ, x1, __VA_ARGS__) /* "SE" stands for "side-effect". Contrary to NM_IN_STRSET(), this does not do * short-circuit evaluation, which can make a difference if the arguments have * side-effects. */ #define NM_IN_STRSET_SE(x1, ...) _NM_IN_STRSET_EVAL(|, _NM_IN_STRSET_EVAL_OP_STREQ, x1, __VA_ARGS__) /*****************************************************************************/ #define NM_STRCHAR_ALL(str, ch_iter, predicate) \ ({ \ int _val = true; \ const char *_str = (str); \ \ if (_str) { \ for (;;) { \ const char ch_iter = _str[0]; \ \ if (ch_iter != '\0') { \ if (predicate) { \ _str++; \ continue; \ } \ _val = false; \ } \ break; \ } \ } \ _val; \ }) #define NM_STRCHAR_ANY(str, ch_iter, predicate) \ ({ \ int _val = false; \ const char *_str = (str); \ \ if (_str) { \ for (;;) { \ const char ch_iter = _str[0]; \ \ if (ch_iter != '\0') { \ if (predicate) { \ ; \ } else { \ _str++; \ continue; \ } \ _val = true; \ } \ break; \ } \ } \ _val; \ }) /*****************************************************************************/ /* Note: @value is only evaluated when *out_val is present. * Thus, * NM_SET_OUT (out_str, g_strdup ("hallo")); * does the right thing. */ #define NM_SET_OUT(out_val, value) \ ({ \ typeof(*(out_val)) *_out_val = (out_val); \ \ if (_out_val) { \ *_out_val = (value); \ } \ \ (!!_out_val); \ }) /*****************************************************************************/ #define NM_AUTO_DEFINE_FCN_VOID(CastType, name, func) \ static inline void name(void *v) \ { \ func(*((CastType *) v)); \ } \ _NM_DUMMY_STRUCT_FOR_TRAILING_SEMICOLON #define NM_AUTO_DEFINE_FCN_VOID0(CastType, name, func) \ static inline void name(void *v) \ { \ if (*((CastType *) v)) \ func(*((CastType *) v)); \ } \ _NM_DUMMY_STRUCT_FOR_TRAILING_SEMICOLON #define NM_AUTO_DEFINE_FCN(Type, name, func) \ static inline void name(Type *v) \ { \ func(*v); \ } \ _NM_DUMMY_STRUCT_FOR_TRAILING_SEMICOLON #define NM_AUTO_DEFINE_FCN0(Type, name, func) \ static inline void name(Type *v) \ { \ if (*v) \ func(*v); \ } \ _NM_DUMMY_STRUCT_FOR_TRAILING_SEMICOLON /*****************************************************************************/ /** * nm_auto_free: * * Call free() on a variable location when it goes out of scope. * This is for pointers that are allocated with malloc() instead of * g_malloc(). * * In practice, since glib 2.45, g_malloc()/g_free() always wraps malloc()/free(). * See bgo#751592. In that case, it would be safe to free pointers allocated with * malloc() with gs_free or g_free(). * * However, let's never mix them. To free malloc'ed memory, always use * free() or nm_auto_free. */ NM_AUTO_DEFINE_FCN_VOID0(void *, _nm_auto_free_impl, free); #define nm_auto_free nm_auto(_nm_auto_free_impl) static inline void _nm_auto_protect_errno(const int *p_saved_errno) { errno = *p_saved_errno; } #define NM_AUTO_PROTECT_ERRNO(errsv_saved) \ nm_auto(_nm_auto_protect_errno) _nm_unused const int errsv_saved = (errno) /*****************************************************************************/ /** * nm_close_with_error: * * Wrapper around close(). * * This fails an nm_assert() for EBADF with a non-negative file descriptor. Trying * to close an invalid file descriptor is always a serious bug. Never use close() * directly, because we want to catch such bugs. * * This also suppresses any EINTR and pretends success. That is appropriate * on Linux (but not necessarily on other POSIX systems). * * In no case is it appropriate to use @fd afterwards (or retry). * * This function returns 0 on success, or a negative errno value. * On success, errno is undefined afterwards. On failure, errno is * the same as the (negative) return value. * * In the common case, when you don't intend to handle the error from close(), * prefer nm_close() over nm_close_with_error(). Never use close() directly. * * The function is also async-signal-safe (unless an assertion fails). * * Returns: 0 on success or the negative errno from close(). */ static inline int nm_close_with_error(int fd) { int r; r = close(fd); if (r != 0) { int errsv = errno; nm_assert(r == -1); /* EBADF indicates a bug. * * - if fd is non-negative, this means the tracking of the descriptor * got messed up. That's very bad, somebody closed a wrong FD or we * might do so. On a multi threaded application, messing up the tracking * of the file descriptor means we race against closing an unrelated FD. * - if fd is negative, it may not be a bug but intentional. However, our callers * are not supposed to call close() on a negative FD either. Assert * against that too. */ nm_assert(errsv != EBADF); if (errsv == EINTR) { /* There isn't really much we can do about EINTR. On Linux, always this means * the FD was closed. On some POSIX systems that may be different and retry * would be appropriate. * * Whether there was any IO error is unknown. Assume not and signal success. */ return 0; } return -errsv; } return 0; } /** * nm_close: * * Wrapper around nm_close_with_error(), which ignores any error and preserves the * caller's errno. * * We usually don't care about errors from close, so this is usually preferable over * nm_close_with_error(). Never use close() directly. * * Everything from nm_close_with_error() applies. */ static inline void nm_close(int fd) { NM_AUTO_PROTECT_ERRNO(errsv); nm_close_with_error(fd); } static inline bool nm_clear_fd(int *p_fd) { int fd; if (!p_fd || (fd = *p_fd) < 0) return false; *p_fd = -1; nm_close(fd); return true; } static inline void _nm_auto_close(int *pfd) { if (*pfd >= 0) nm_close(*pfd); } #define nm_auto_close nm_auto(_nm_auto_close) static inline void _nm_auto_fclose(FILE **pfd) { if (*pfd) { NM_AUTO_PROTECT_ERRNO(errsv); (void) fclose(*pfd); } } #define nm_auto_fclose nm_auto(_nm_auto_fclose) /*****************************************************************************/ #define nm_clear_pointer(pp, destroy) \ ({ \ typeof(*(pp)) *_pp = (pp); \ typeof(*_pp) _p; \ int _changed = false; \ \ if (_pp && (_p = *_pp)) { \ _NM_ENSURE_POINTER(_p); \ \ *_pp = NULL; \ \ /* g_clear_pointer() assigns @destroy first to a local variable, so that * you can call "g_clear_pointer (pp, (GDestroyNotify) destroy);" without * gcc emitting a warning. We don't do that, hence, you cannot cast * "destroy" first. * * On the upside: you are not supposed to cast fcn, because the pointer * types are preserved. If you really need a cast, you should cast @pp. * But that is hardly ever necessary. */ \ (destroy)(_p); \ \ _changed = true; \ } \ _changed; \ }) #define nm_clear_free(pp) nm_clear_pointer(pp, free) /*****************************************************************************/ #define nm_steal_pointer(pp) \ ({ \ typeof(*(pp)) *const _pp = (pp); \ typeof(*_pp) _p = *_pp; \ \ _NM_ENSURE_POINTER(_p); \ \ *_pp = NULL; \ _p; \ }) /** * nm_steal_int: * @p_val: pointer to an int type. * * Returns: *p_val and sets *p_val to zero the same time. * Accepts %NULL, in which case also numeric 0 will be returned. */ #define nm_steal_int(p_val) \ ({ \ typeof(p_val) const _p_val = (p_val); \ typeof(*_p_val) _val = 0; \ \ if (_p_val && ((_val = *_p_val) != 0)) { \ *_p_val = 0; \ } \ _val; \ }) static inline int nm_steal_fd(int *p_fd) { int fd; if (p_fd && ((fd = *p_fd) >= 0)) { *p_fd = -1; return fd; } return -1; } /*****************************************************************************/ static inline uintptr_t nm_ptr_to_uintptr(const void *p) { /* in C, pointers can only be compared (with less-than or greater-than) under certain * circumstances. Since uintptr_t is supposed to be able to represent the pointer * as a plain integer and also support to convert the integer back to the pointer, * it should be safer to compare the pointers directly. * * Of course, this function isn't very useful beyond that its use makes it clear * that we want to compare pointers by value, which otherwise may not be valid. */ return (uintptr_t) p; } /*****************************************************************************/ #define NM_CMP_RETURN(c) \ do { \ const int _cc = (c); \ \ if (_cc) \ return _cc < 0 ? -1 : 1; \ } while (0) #define NM_CMP_RETURN_DIRECT(c) \ /* Usually we want that our CMP functions return strictly * -1, 0, or 1. NM_CMP_RETURN_DIRECT() is like NM_CMP_RETURN(), * except, it does not clamp the integer value. */ \ do { \ const int _cc = (c); \ \ if (_cc) \ return _cc; \ } while (0) #define NM_CMP_SELF(a, b) \ do { \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ if (_a == _b) \ return 0; \ if (!_a) \ return -1; \ if (!_b) \ return 1; \ } while (0) /*****************************************************************************/ #define NM_CMP_DIRECT(a, b) \ do { \ typeof(a) _a = (a); \ typeof(b) _b = (b); \ \ if (_a != _b) \ return (_a < _b) ? -1 : 1; \ } while (0) #define NM_CMP_DIRECT_UNSAFE(a, b) \ /* This variant is "unsafe", because it evaluates the arguments more then once. * This is only useful for bitfields, for which typeof() doesn't work. * Don't use otherwise. */ \ do { \ if ((a) != (b)) \ return ((a) < (b)) ? -1 : 1; \ } while (0) /* In the general case, direct pointer comparison is undefined behavior in C. * Avoid that by casting pointers to void* and then to uintptr_t. This comparison * is not really meaningful, except that it provides some kind of stable sort order * between pointers (that can otherwise not be compared). */ #define NM_CMP_DIRECT_PTR(a, b) NM_CMP_DIRECT(nm_ptr_to_uintptr(a), nm_ptr_to_uintptr(b)) #define NM_CMP_DIRECT_BOOL(a, b) NM_CMP_DIRECT(!!(a), !!(b)) #define NM_CMP_DIRECT_MEMCMP(a, b, size) NM_CMP_RETURN(nm_memcmp((a), (b), (size))) #define NM_CMP_DIRECT_STRCMP(a, b) NM_CMP_RETURN_DIRECT(strcmp((a), (b))) #define NM_CMP_DIRECT_STRCMP0(a, b) NM_CMP_RETURN_DIRECT(nm_strcmp0((a), (b))) #define NM_CMP_DIRECT_STR_INTERNED(a, b) \ /* This is interned strings, which are first checked for equality only using pointer * comparison. Only in case of differences, the sort order is still determined by strcmp(). */ \ do { \ const char *const _a = (a); \ const char *const _b = (b); \ \ if (_a != _b) \ NM_CMP_RETURN_DIRECT(nm_strcmp0(_a, _b)); \ } while (0) #define NM_CMP_DIRECT_IN6ADDR(a, b) \ do { \ const struct in6_addr *const _a = (a); \ const struct in6_addr *const _b = (b); \ \ NM_CMP_RETURN(memcmp(_a, _b, sizeof(struct in6_addr))); \ } while (0) /*****************************************************************************/ #define NM_CMP_FIELD(a, b, field) NM_CMP_DIRECT(((a)->field), ((b)->field)) #define NM_CMP_FIELD_UNSAFE(a, b, field) \ /* This variant is "unsafe", because it evaluates the arguments more then once. * This is only useful for bitfields, for which typeof() doesn't work. * Don't use otherwise. */ \ NM_CMP_DIRECT_UNSAFE(((a)->field), ((b)->field)) #define NM_CMP_FIELD_BOOL(a, b, field) NM_CMP_DIRECT_BOOL(((a)->field), ((b)->field)) #define NM_CMP_FIELD_STR(a, b, field) NM_CMP_DIRECT_STRCMP(((a)->field), ((b)->field)) #define NM_CMP_FIELD_STR0(a, b, field) NM_CMP_DIRECT_STRCMP0(((a)->field), ((b)->field)) #define NM_CMP_FIELD_STR_INTERNED(a, b, field) \ NM_CMP_DIRECT_STR_INTERNED(((a)->field), ((b)->field)) #define NM_CMP_FIELD_MEMCMP_LEN(a, b, field, len) \ NM_CMP_DIRECT_MEMCMP(&((a)->field), &((b)->field), NM_MIN(len, sizeof((a)->field))) #define NM_CMP_FIELD_MEMCMP(a, b, field) \ NM_CMP_DIRECT_MEMCMP(&((a)->field), &((b)->field), sizeof((a)->field)) #define NM_CMP_FIELD_IN6ADDR(a, b, field) NM_CMP_DIRECT_IN6ADDR(&((a)->field), &((b)->field)) /*****************************************************************************/ #define NM_AF_UNSPEC 0 /* AF_UNSPEC */ #define NM_AF_INET 2 /* AF_INET */ #define NM_AF_INET6 10 /* AF_INET6 */ #define NM_AF_INET_SIZE 4 /* sizeof (in_addr_t) */ #define NM_AF_INET6_SIZE 16 /* sizeof (stuct in6_addr) */ static inline const char * nm_utils_addr_family_to_str(int addr_family) { switch (addr_family) { case NM_AF_UNSPEC: return ""; case NM_AF_INET: return "4"; case NM_AF_INET6: return "6"; } nm_assert_not_reached(); return "?"; } static inline char nm_utils_addr_family_to_char(int addr_family) { switch (addr_family) { case NM_AF_UNSPEC: return 'X'; case NM_AF_INET: return '4'; case NM_AF_INET6: return '6'; } nm_assert_not_reached(); return '?'; } #define nm_assert_addr_family(addr_family) \ nm_assert(NM_IN_SET((addr_family), NM_AF_INET, NM_AF_INET6)) #define nm_assert_addr_family_or_unspec(addr_family) \ nm_assert(NM_IN_SET((addr_family), NM_AF_UNSPEC, NM_AF_INET, NM_AF_INET6)) #define _NM_IS_IPv4(uniq, addr_family) \ ({ \ const int NM_UNIQ_T(_addr_family, uniq) = (addr_family); \ \ nm_assert_addr_family(NM_UNIQ_T(_addr_family, uniq)); \ \ (NM_UNIQ_T(_addr_family, uniq) == NM_AF_INET); \ }) #define NM_IS_IPv4(addr_family) _NM_IS_IPv4(NM_UNIQ, addr_family) static inline int nm_utils_addr_family_other(int addr_family) { return NM_IS_IPv4(addr_family) ? NM_AF_INET6 : NM_AF_INET; } static inline size_t nm_utils_addr_family_to_size(int addr_family) { if (!NM_IS_IPv4(addr_family)) return NM_AF_INET6_SIZE; else return NM_AF_INET_SIZE; } static inline size_t nm_utils_addr_family_to_size_untrusted(int addr_family) { /* This is almost the same as nm_utils_addr_family_to_size(). * The difference is that nm_utils_addr_family_to_size() requires that * addr_family is either AF_INET or AF_INET6 (it asserts against that). * * This variant accepts any addr_family, but returns zero for any unknown * family. * * Use this, if the address family is untrusted or not guaranteed to be valid. * Of course, then you also need to handle that this function potentially returns * zero. */ switch (addr_family) { case NM_AF_INET: return NM_AF_INET_SIZE; case NM_AF_INET6: return NM_AF_INET6_SIZE; } return 0; } static inline int nm_utils_addr_family_from_size(size_t len) { switch (len) { case NM_AF_INET_SIZE: return NM_AF_INET; case NM_AF_INET6_SIZE: return NM_AF_INET6; } return NM_AF_UNSPEC; } #define _NM_PTR_IS_ALIGNED_(uniq, type, ptr) \ ({ \ const void *const NM_UNIQ_T(_ptr, uniq) = (ptr); \ \ /* NULL is accepted too. */ \ \ (!NM_UNIQ_T(_ptr, uniq) \ || ((((uintptr_t) (void *) NM_UNIQ_T(_ptr, uniq)) % _nm_alignof(type)) == 0)); \ }) #define _NM_PTR_IS_ALIGNED(type, ptr) _NM_PTR_IS_ALIGNED_(NM_UNIQ, type, (ptr)) /* We build with "-Wcast-align=strict", which can warn about alignment problems * with casting. In some cases, we know that the pointer has the suitable * alignment and the cast is in fact correct. The way to disable the warning * would be to cast ((Type *) ((void *) (ptr))). * * This macro does essentially that, but it also does an nm_assert() that the * alignment of the pointer is suitable to cast to (Type *). */ #define _NM_CAST_ALIGN(uniq, Type, ptr) \ ({ \ const void *const NM_UNIQ_T(_ptr, uniq) = (ptr); \ \ nm_assert(_NM_PTR_IS_ALIGNED(Type, NM_UNIQ_T(_ptr, uniq))); \ \ ((Type *) NM_UNIQ_T(_ptr, uniq)); \ }) #define NM_CAST_ALIGN(Type, ptr) _NM_CAST_ALIGN(NM_UNIQ, Type, ptr) #endif /* __NM_STD_AUX_H__ */