strtof.c File Reference

#include "gdtoaimp.h"

Include dependency graph for strtof.c:

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Functions
float	strtof (CONST char *s, char **sp)

Function Documentation

strtof()

float strtof	(	CONST char *	s,
		char **	sp
	)

Definition at line 39 of file strtof.c.

{
    static FPI fpi = {24, 1 - 127 - 24 + 1, 254 - 127 - 24 + 1, 1, SI};
    ULong bits[1];
    Long exp;
    int k;
    union
    {
        ULong L[1];
        float f;
    } u;

    k = strtodg(s, sp, &fpi, &exp, bits);
    switch(k & STRTOG_Retmask)
    {
        case STRTOG_NoNumber:
        case STRTOG_Zero:
            u.L[0] = 0;
            break;

        case STRTOG_Normal:
        case STRTOG_NaNbits:
            u.L[0] = (bits[0] & 0x7fffff) | (unsigned)((exp + 0x7f + 23) << 23);
            break;

        case STRTOG_Denormal:
            u.L[0] = bits[0];
            break;

        case STRTOG_Infinite:
            u.L[0] = 0x7f800000;
            break;

        case STRTOG_NaN:
            u.L[0] = f_QNAN;
    }
    if(k & STRTOG_Neg)
    {
        {
            u.L[0] |= 0x80000000L;
        }
    }
    return u.f;
}

References Long, SI, strtodg(), STRTOG_Denormal, STRTOG_Infinite, STRTOG_NaN, STRTOG_NaNbits, STRTOG_Neg, STRTOG_NoNumber, STRTOG_Normal, STRTOG_Retmask, and STRTOG_Zero.