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/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* 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.
*/
/**
* \file imports.h
* Standard C library function wrappers.
*
* This file provides wrappers for all the standard C library functions
* like malloc(), free(), printf(), getenv(), etc.
*/
#ifndef IMPORTS_H
#define IMPORTS_H
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "util/compiler.h"
#include "util/bitscan.h"
#include "util/u_memory.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
* as offsets into buffer stores. Since the vertex array pointer and
* buffer store pointer are both pointers and we need to add them, we use
* this macro.
* Both pointers/offsets are expressed in bytes.
*/
#define ADD_POINTERS(A, B) ( (uint8_t *) (A) + (uintptr_t) (B) )
/**
* Sometimes we treat floats as ints. On x86 systems, moving a float
* as an int (thereby using integer registers instead of FP registers) is
* a performance win. Typically, this can be done with ordinary casts.
* But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
* these casts generate warnings.
* The following union typedef is used to solve that.
*/
typedef union { float f; int i; unsigned u; } fi_type;
/*@}*/
/**
* finite macro.
*/
#if defined(_MSC_VER)
# define finite _finite
#endif
/***
*** IS_INF_OR_NAN: test if float is infinite or NaN
***/
#if defined(isfinite)
#define IS_INF_OR_NAN(x) (!isfinite(x))
#elif defined(finite)
#define IS_INF_OR_NAN(x) (!finite(x))
#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define IS_INF_OR_NAN(x) (!isfinite(x))
#else
#define IS_INF_OR_NAN(x) (!finite(x))
#endif
/**
* Convert float to int by rounding to nearest integer, away from zero.
*/
static inline int IROUND(float f)
{
return (int) ((f >= 0.0F) ? (f + 0.5F) : (f - 0.5F));
}
/**
* Convert double to int by rounding to nearest integer, away from zero.
*/
static inline int IROUNDD(double d)
{
return (int) ((d >= 0.0) ? (d + 0.5) : (d - 0.5));
}
/**
* Convert float to int64 by rounding to nearest integer.
*/
static inline int64_t IROUND64(float f)
{
return (int64_t) ((f >= 0.0F) ? (f + 0.5F) : (f - 0.5F));
}
/**********************************************************************
* Functions
*/
extern void *
_mesa_align_malloc( size_t bytes, unsigned long alignment );
extern void *
_mesa_align_calloc( size_t bytes, unsigned long alignment );
extern void
_mesa_align_free( void *ptr );
extern void *
_mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
unsigned long alignment);
extern int
_mesa_snprintf( char *str, size_t size, const char *fmt, ... ) PRINTFLIKE(3, 4);
extern int
_mesa_vsnprintf(char *str, size_t size, const char *fmt, va_list arg);
#if defined(_WIN32) && !defined(HAVE_STRTOK_R)
#define strtok_r strtok_s
#endif
#ifdef __cplusplus
}
#endif
#endif /* IMPORTS_H */
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