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| author | Tyge Løvset <[email protected]> | 2020-03-16 18:44:29 +0100 |
|---|---|---|
| committer | GitHub <[email protected]> | 2020-03-16 18:44:29 +0100 |
| commit | 358065f69f1320aff3c2b855911ed33bce86bd33 (patch) | |
| tree | 2d210a13a94930d375ef7d22b9755b1091ccf6b7 /c_lib | |
| parent | c02ac60fb2302476037bab2b335602a0a570bd83 (diff) | |
| download | STC-modified-358065f69f1320aff3c2b855911ed33bce86bd33.tar.gz STC-modified-358065f69f1320aff3c2b855911ed33bce86bd33.zip | |
Rename clib/cdefs.h to c_lib/cdefs.h
Diffstat (limited to 'c_lib')
| -rw-r--r-- | c_lib/cdefs.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/c_lib/cdefs.h b/c_lib/cdefs.h new file mode 100644 index 00000000..598dc863 --- /dev/null +++ b/c_lib/cdefs.h @@ -0,0 +1,71 @@ +// MIT License
+//
+// Copyright (c) 2020 Tyge Løvset, NORCE, www.norceresearch.no
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#ifndef CDEFS__H__
+#define CDEFS__H__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+// Macro overloading feature support: https://rextester.com/ONP80107
+#define c_CAT( A, B ) A ## B
+#define c_EXPAND(...) __VA_ARGS__
+#define c_VA_ARG_SIZE(...) c_EXPAND(c_APPLY_ARG_N((__VA_ARGS__, c_RSEQ_N)))
+#define c_APPLY_ARG_N(ARGS) c_EXPAND(c_ARG_N ARGS)
+#define c_ARG_N(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, N,...) N
+#define c_RSEQ_N 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
+#define c_OVERLOAD_SELECT(NAME, NUM) c_CAT( NAME ## _, NUM)
+
+#define c_MACRO_OVERLOAD(NAME, ...) c_OVERLOAD_SELECT(NAME, c_VA_ARG_SIZE(__VA_ARGS__))(__VA_ARGS__)
+// #define foo(...) c_MACRO_OVERLOAD(foo, __VA_ARGS__)
+// #define foo_1(X) foo_2(X, 100)
+// #define foo_2(X, Y) X + Y
+
+#define c_npos ((size_t) -1)
+#define c_max_alloca (1000)
+#define c_swap(T, x, y) { T __t = x; x = y; y = __t; }
+
+#define c_defaultInitRaw(x) (x)
+#define c_defaultGetRaw(x) (x)
+static inline void c_defaultDestroy(void* value) {}
+
+#define c_foreach(it, ctag, con) \
+ for (ctag##_iter_t it = ctag##_begin(con); it.item != ctag##_end(con).item; it = ctag##_next(it))
+
+// One-byte-at-a-time hash based on Murmur's mix
+static inline uint32_t c_defaultHash(const void *data, size_t len) {
+ const uint8_t *key = (const uint8_t *) data;
+ uint32_t h = 0xc613fc15;
+ while (len--) {
+ h ^= *key++;
+ h *= 0x5bd1e995;
+ h ^= h >> 15;
+ }
+ return h;
+}
+
+// https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
+static inline uint32_t c_reduce(uint32_t x, uint32_t N) {
+ return ((uint64_t) x * (uint64_t) N) >> 32 ;
+}
+
+#endif
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