mirror of
https://github.com/ZDoom/raze-gles.git
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118 lines
2.5 KiB
C++
118 lines
2.5 KiB
C++
// Compatibility declarations for things which might not be present in
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// certain build environments. It also levels the playing field caused
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// by different platforms.
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#ifndef compat_h_
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#define compat_h_
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#pragma once
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#include "xs_Float.h"
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#include "m_alloc.h"
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#include "intvec.h"
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#include "m_swap.h"
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////////// Language and compiler feature polyfills //////////
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# define fallthrough__ [[fallthrough]]
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////////// Architecture detection //////////
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#ifdef WORDS_BIGENDIAN
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# define B_BIG_ENDIAN 1
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#else
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# define B_BIG_ENDIAN 0
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#endif
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#include <inttypes.h>
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#include <stdint.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if !(defined _WIN32 && defined __clang__)
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#include <float.h>
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#endif
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#include <math.h>
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#include <ctype.h>
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#include <errno.h>
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#include <time.h>
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#include <assert.h>
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# include <limits>
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# include <algorithm>
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# include <functional>
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# include <type_traits>
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////////// Platform headers //////////
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#if !defined __APPLE__ && (!defined EDUKE32_BSD || !__STDC__) && !defined __OpenBSD__ && !defined __DragonFly__
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# include <malloc.h>
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#endif
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#include "engineerrors.h"
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typedef intptr_t bssize_t;
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#define BMAX_PATH 256
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////////// Metaprogramming structs //////////
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using native_t = intptr_t;
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typedef struct {
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float x, y;
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} vec2f_t;
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typedef struct {
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union {
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struct {
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union { float x, d; };
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union { float y, u; };
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union { float z, v; };
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};
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vec2f_t vec2;
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};
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} vec3f_t;
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static_assert(sizeof(vec3f_t) == sizeof(float) * 3);
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////////// Language tricks that depend on size_t //////////
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#include "basics.h"
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////////// Bitfield manipulation //////////
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inline void bitmap_set(uint8_t *const ptr, int const n) { ptr[n>>3] |= 1 << (n&7); }
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inline char bitmap_test(uint8_t const *const ptr, int const n) { return ptr[n>>3] & (1 << (n&7)); }
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////////// Utility functions //////////
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// breadth-first search helpers
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template <typename T>
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void bfirst_search_init(T *const list, uint8_t *const bitmap, T *const eltnumptr, int const maxelts, int const firstelt)
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{
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memset(bitmap, 0, (maxelts+7)>>3);
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list[0] = firstelt;
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bitmap_set(bitmap, firstelt);
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*eltnumptr = 1;
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}
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template <typename T>
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void bfirst_search_try(T *const list, uint8_t *const bitmap, T *const eltnumptr, int const elt)
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{
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if (!bitmap_test(bitmap, elt))
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{
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bitmap_set(bitmap, elt);
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list[(*eltnumptr)++] = elt;
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}
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}
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#endif // compat_h_
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