*: auto-convert to SPDX License IDs

[mirror_frr.git] / lib / compiler.h

diff --git a/lib/compiler.h b/lib/compiler.h
index 970ed297fc7142a7616ca759bacd020eb0a9d1e3..d12e2828326f1d914ad93b61697919591d047097 100644 (file)
--- a/lib/compiler.h
+++ b/lib/compiler.h
@@ -1,17 +1,6 @@
+// SPDX-License-Identifier: ISC
 /*
  * Copyright (c) 2015-2017  David Lamparter, for NetDEF, Inc.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #ifndef _FRR_COMPILER_H
@@ -72,6 +61,16 @@ extern "C" {
 #endif
 #endif
 
+#ifdef __INTELLISENSE__
+/*
+ * Fix Visual Studio Code error: attribute "constructor" does not take
+ * arguments.
+ *
+ * Caused by the macro `DEFINE_MTYPE_ATTR` in `lib/memory.h`.
+ */
+#pragma diag_suppress 1094
+#endif /* __INTELISENSE__ */
+
 #if __has_attribute(hot)
 #  define _OPTIMIZE_HOT __attribute__((hot))
 #else
@@ -173,6 +172,29 @@ extern "C" {
 #define MACRO_REPEAT(NAME, ...) \
        MACRO_VARIANT(_MACRO_REPEAT, ##__VA_ARGS__)(NAME, ##__VA_ARGS__)
 
+/* per-arglist repeat macro, use like this:
+ * #define foo(...) MAP_LISTS(F, ##__VA_ARGS__)
+ * where F is a n-ary function where n is the number of args in each arglist.
+ * e.g.: MAP_LISTS(f, (a, b), (c, d))
+ * expands to: f(a, b); f(c, d)
+ */
+
+#define ESC(...) __VA_ARGS__
+#define MAP_LISTS(M, ...)                                                      \
+       _CONCAT(_MAP_LISTS_, PP_NARG(__VA_ARGS__))(M, ##__VA_ARGS__)
+#define _MAP_LISTS_0(M)
+#define _MAP_LISTS_1(M, _1) ESC(M _1)
+#define _MAP_LISTS_2(M, _1, _2) ESC(M _1; M _2)
+#define _MAP_LISTS_3(M, _1, _2, _3) ESC(M _1; M _2; M _3)
+#define _MAP_LISTS_4(M, _1, _2, _3, _4) ESC(M _1; M _2; M _3; M _4)
+#define _MAP_LISTS_5(M, _1, _2, _3, _4, _5) ESC(M _1; M _2; M _3; M _4; M _5)
+#define _MAP_LISTS_6(M, _1, _2, _3, _4, _5, _6)                                \
+       ESC(M _1; M _2; M _3; M _4; M _5; M _6)
+#define _MAP_LISTS_7(M, _1, _2, _3, _4, _5, _6, _7)                            \
+       ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7)
+#define _MAP_LISTS_8(M, _1, _2, _3, _4, _5, _6, _7, _8)                        \
+       ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7; M _8)
+
 /*
  * for warnings on macros, put in the macro content like this:
  *   #define MACRO BLA CPP_WARN("MACRO has been deprecated")
@@ -388,6 +410,35 @@ _Static_assert(sizeof(_uint64_t) == 8 && sizeof(_int64_t) == 8,
 #endif /* !__cplusplus */
 #endif /* !_FRR_ATTRIBUTE_PRINTFRR */
 
+/* helper to get type safety/avoid casts on calls
+ * (w/o this, functions accepting all prefix types need casts on the caller
+ * side, which strips type safety since the cast will accept any pointer
+ * type.)
+ */
+#ifndef __cplusplus
+#define prefixtype(uname, typename, fieldname) typename *fieldname;
+#define TRANSPARENT_UNION __attribute__((transparent_union))
+#else
+#define prefixtype(uname, typename, fieldname)                                 \
+       typename *fieldname;                                                   \
+       uname(typename *x)                                                     \
+       {                                                                      \
+               this->fieldname = x;                                           \
+       }
+#define TRANSPARENT_UNION
+#endif
+
+#ifdef __INTELLISENSE__
+/*
+ * Fix Visual Studio Code error: argument of type "struct prefix *" is
+ * incompatible with parameter of type "union prefixptr".
+ *
+ * This is caused by all functions having the transparent unions in the
+ * prototype. Example: `prefixptr` and `prefixconstptr` from `lib/prefix.h`.
+ */
+#pragma diag_suppress 167
+#endif /* __INTELISENSE__ */
+
 #ifdef __cplusplus
 }
 #endif