mirror of
https://github.com/ZDoom/Raze.git
synced 2024-12-11 13:21:49 +00:00
817fa8aba3
The sprite lists may still need optimization. Due to different handling between Blood and the core engine they need to be written out completely which is quite wasteful.
260 lines
5.8 KiB
C++
260 lines
5.8 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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#include "serializer.h"
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////////// Compiler detection //////////
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#ifdef __GNUC__
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# define EDUKE32_GCC_PREREQ(major, minor) (major < __GNUC__ || (major == __GNUC__ && minor <= __GNUC_MINOR__))
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#else
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# define EDUKE32_GCC_PREREQ(major, minor) 0
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#endif
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////////// Language detection //////////
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////////// Language and compiler feature polyfills //////////
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# define EXTERNC
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#ifndef UNREFERENCED_PARAMETER
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# define UNREFERENCED_PARAMETER(x) (x) = (x)
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#endif
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#if defined __GNUC__ || defined __clang__
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# define ATTRIBUTE(attrlist) __attribute__(attrlist)
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#else
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# define ATTRIBUTE(attrlist)
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#endif
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#ifndef MAY_ALIAS
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# ifdef _MSC_VER
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# define MAY_ALIAS
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# else
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# define MAY_ALIAS __attribute__((may_alias))
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# endif
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#endif
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#ifndef FORCE_INLINE
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# ifdef _MSC_VER
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# define FORCE_INLINE __forceinline
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# else
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# ifdef __GNUC__
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# define FORCE_INLINE inline __attribute__((always_inline))
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# else
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# define FORCE_INLINE inline
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# endif
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# endif
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#endif
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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__)
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# include <malloc.h>
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#endif
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#include "engineerrors.h"
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////////// DEPRECATED: Standard library prefixing //////////
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typedef intptr_t ssize_t;
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typedef ssize_t bssize_t;
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#define BMAX_PATH 256
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////////// Metaprogramming structs //////////
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using std::enable_if_t;
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using native_t = intptr_t;
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typedef struct MAY_ALIAS {
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int32_t x, y;
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} vec2_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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double x, y;
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} vec2d_t;
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typedef struct MAY_ALIAS {
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union {
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struct { int32_t x, y, z; };
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vec2_t vec2;
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};
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} vec3_t;
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typedef struct MAY_ALIAS {
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union {
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struct { int16_t x, y, z; };
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vec2_16_t vec2;
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};
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} vec3_16_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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typedef struct {
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union { double x; double d; };
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union { double y; double u; };
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union { double z; double v; };
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} vec3d_t;
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static_assert(sizeof(vec3d_t) == sizeof(double) * 3);
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////////// Language tricks that depend on size_t //////////
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#include "basics.h"
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////////// Pointer management //////////
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#define DO_FREE_AND_NULL(var) do { \
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Xfree(var); (var) = NULL; \
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} while (0)
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////////// Data serialization //////////
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inline int32_t B_LITTLE32(int32_t val) { return LittleLong(val); }
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inline uint32_t B_LITTLE32(uint32_t val) { return LittleLong(val); }
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inline int32_t B_LITTLE16(int16_t val) { return LittleShort(val); }
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inline uint32_t B_LITTLE16(uint16_t val) { return LittleShort(val); }
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static FORCE_INLINE void B_BUF32(void * const buf, uint32_t const x) { *(uint32_t *) buf = x; }
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static FORCE_INLINE uint32_t B_UNBUF32(void const * const buf) { return *(uint32_t const *) buf; }
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static FORCE_INLINE uint16_t B_UNBUF16(void const * const buf) { return *(uint16_t const *) buf; }
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////////// Abstract data operations //////////
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using std::min;
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using std::max;
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////////// Bitfield manipulation //////////
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// This once was a static array, requiring a memory acces where a shift would suffice.
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// Revert the above to a real bit shift through some C++ operator magic. That saves me from reverting all the code that uses this construct.
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// Note: Only occurs 25 times in the code, should be removed for good.
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static struct
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{
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constexpr uint8_t operator[](int index) const { return 1 << index; };
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} pow2char;
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static FORCE_INLINE void bitmap_set(uint8_t *const ptr, int const n) { ptr[n>>3] |= 1 << (n&7); }
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static FORCE_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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////////// PANICKING ALLOCATION WRAPPERS //////////
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#define Xstrdup(s) (strdup(s))
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#define Xmalloc(size) (M_Malloc(size))
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#define Xcalloc(nmemb, size) (M_Calloc(nmemb, size))
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#define Xrealloc(ptr, size) (M_Realloc(ptr, size))
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#define Xfree(ptr) (M_Free(ptr))
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////////// Inlined external libraries //////////
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/* End dependence on compat.o object. */
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inline FSerializer& Serialize(FSerializer& arc, const char* key, vec3_t& c, vec3_t* def)
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{
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if (def && !memcmp(&c, def, sizeof(c))) return arc;
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if (arc.BeginObject(key))
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{
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arc("x", c.x, def? &def->x : nullptr)
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("y", c.y, def ? &def->y : nullptr)
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("z", c.z, def ? &def->z : nullptr)
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.EndObject();
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}
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return arc;
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}
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#endif // compat_h_
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