#include

typedef union { longL; floatF;}LF_t;

char *ftoa(float f, int *status){long mantissa, int_part, frac_part;short exp2;LF_t x;char *p;static char outbuf[15];

if (f == 0.0){outbuf[0] = '0';outbuf[1] = '.';outbuf[2] = '0';outbuf[3] = 0;return outbuf;}x.F = f;

exp2 = (unsigned char)(x.L >> 23) - 127; mantissa = (x.L & 0xFFFFFF) | 0x800000; frac_part = 0; int_part = 0;

if (exp2 >= 31){*status = _FTOA_TOO_LARGE;return 0;}else if (exp2 < -23){*status = _FTOA_TOO_SMALL;return 0;} else if (exp2 >= 23) int_part = mantissa = 0) { int_part = mantissa >> (23 - exp2); frac_part = (mantissa > -(exp2 + 1);

p = outbuf;

if (x.L < 0)*p++ = '-';

if (int_part == 0)*p++ = '0';else{ltoa(p, int_part, 10);while (*p)p++;}*p++ = '.';

if (frac_part == 0)*p++ = '0';else{char m, max;

max = sizeof (outbuf) - (p - outbuf) - 1;if (max > 7)max = 7;/* print BCD */for (m = 0; m < max; m++){/* frac_part *= 10;*/frac_part = (frac_part 24) + '0';frac_part &= 0xFFFFFF;}/* delete ending zeroes */for (--p; p[0] == '0' && p[-1] != '.'; --p);++p;}*p = 0;

*status = 0;return outbuf; }