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phobos 0.149

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This commit is contained in:
Brad Roberts 2007-09-10 05:11:52 +00:00
parent 110cfd9da7
commit d6ac036aff
24 changed files with 163 additions and 42 deletions
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112
std/c/fenv.d Normal file
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/**
* C's <fenv.h>
* Authors: Walter Bright, Digital Mars, www.digitalmars.com
* License: Public Domain
* Macros:
* WIKI=Phobos/StdCFenv
*/
module std.c.fenv;
extern (C):
/// Entire floating point environment
struct fenv_t
{
version (Windows)
{
ushort status;
ushort control;
ushort round;
ushort reserved[2];
}
else version (linux)
{
ushort __control_word;
ushort __unused1;
ushort __status_word;
ushort __unused2;
ushort __tags;
ushort __unused3;
uint __eip;
ushort __cs_selector;
ushort __opcode;
uint __data_offset;
ushort __data_selector;
ushort __unused5;
}
else
{
static assert(0);
}
}
alias int fexcept_t; /// Floating point status flags
/// The various floating point exceptions
enum
{
FE_INVALID = 1,
FE_DENORMAL = 2,
FE_DIVBYZERO = 4,
FE_OVERFLOW = 8,
FE_UNDERFLOW = 0x10,
FE_INEXACT = 0x20,
FE_ALL_EXCEPT = 0x3F, /// Mask of all the exceptions
}
/// Rounding modes
enum
{
FE_TONEAREST = 0,
FE_UPWARD = 0x800,
FE_DOWNWARD = 0x400,
FE_TOWARDZERO = 0xC00,
}
version (Windows)
{
extern fenv_t _FE_DFL_ENV;
/// Default floating point environment
fenv_t* FE_DFL_ENV = &_FE_DFL_ENV;
}
else version (linux
{
/// Default floating point environment
fenv_t* FE_DFL_ENV = cast(fenv_t*)(-1);
}
else
{
static assert(0);
}
/// Floating point precision
enum
{
FE_FLTPREC = 0,
FE_DBLPREC = 0x200,
FE_LDBLPREC = 0x300,
}
int fetestexcept(int excepts);
int feraiseexcept(int excepts);
int feclearexcept(int excepts);
//int fegetexcept(fexcept_t *flagp,int excepts);
//int fesetexcept(fexcept_t *flagp,int excepts);
int fegetround();
int fesetround(int round);
int fegetprec();
int fesetprec(int prec);
int fegetenv(fenv_t *envp);
int fesetenv(fenv_t *envp);
//void feprocentry(fenv_t *envp);
//void feprocexit(const fenv_t *envp);
int fegetexceptflag(fexcept_t *flagp,int excepts);
int fesetexceptflag(fexcept_t *flagp,int excepts);
int feholdexcept(fenv_t *envp);
int feupdateenv(fenv_t *envp);