mirror of
https://github.com/ZDoom/Raze.git
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271 lines
6.2 KiB
C++
271 lines
6.2 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, vec2_t& c, vec2_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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.EndObject();
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}
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return arc;
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}
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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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