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/* yForth? - Written by Luca Padovani (C) 1996/97
* ------------------------------------------------------------------------
* This software is FreeWare as long as it comes with this header in each
* source file, anyway you can use it or any part of it whatever
* you want. It comes without any warranty, so use it at your own risk.
* ------------------------------------------------------------------------
* Module name: float.c
* Abstract: floating word set
*/
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "yforth.h"
#include "core.h"
#include "float.h"
/**************************************************************************/
/* WORDS ******************************************************************/
/**************************************************************************/
void _to_float() {
register Cell len = *sp++;
register Char *s = (Char *) *sp;
extern Char *s_tmp_buffer[];
Char *endptr;
memcpy(s_tmp_buffer, s, len);
if (toupper(s[len - 1]) == 'E' || toupper(s[len - 1]) == 'D') s[len++] = '0';
s[len] = '\0';
*--fp = (Real) strtod(s, &endptr);
if (!*endptr) *sp = FFLAG(1);
else {
*sp = FFLAG(0);
fp++;
}
}
void _d_to_f() {
register DCell d = GET_DCELL(sp);
*--fp = (Real) d;
sp += 2;
}
void _f_store() {
register Real *addr = (Real *) *sp++;
*addr = *fp++;
}
void _f_star() {
fp[1] *= fp[0];
fp++;
}
void _f_plus() {
fp[1] += fp[0];
fp++;
}
void _f_minus() {
fp[1] -= fp[0];
fp++;
}
void _f_slash() {
fp[1] /= fp[0];
fp++;
}
void _f_zero_less() {
sp--;
*sp = FFLAG(*fp < 0.0);
fp++;
}
void _f_zero_equals() {
sp--;
*sp = FFLAG(*fp == 0.0);
fp++;
}
void _f_less_than() {
sp--;
*sp = FFLAG(fp[1] < fp[0]);
fp += 2;
}
void _f_to_d() {
register DCell d = (DCell) *fp++;
sp -= 2;
PUT_DCELL(sp, d);
}
void _f_fetch() {
*--fp = *((Real *) *sp++);
}
void _f_constant() {
register Real r = *fp++;
create_definition(A_FCONSTANT);
compile_real(r);
mark_word(_last);
}
void _f_depth() {
*--sp = fp_top - fp;
}
void _f_drop() {
fp++;
}
void _f_dupe() {
fp--;
fp[0] = fp[1];
}
void _f_literal() {
compile_cell((Cell) _do_fliteral);
compile_real(fp[0]);
fp++;
}
void _float_plus() {
sp[0] += sizeof(Real);
}
void _floats() {
sp[0] *= sizeof(Real);
}
void _floor() {
fp[0] = floor(fp[0]);
}
void _f_max() {
if (fp[0] > fp[1]) fp[1] = fp[0];
fp++;
}
void _f_min() {
if (fp[0] < fp[1]) fp[1] = fp[0];
fp++;
}
void _f_negate() {
fp[0] = -fp[0];
}
void _f_over() {
fp--;
fp[0] = fp[2];
}
void _f_rote() {
register Real temp = fp[0];
fp[0] = fp[2];
fp[2] = fp[1];
fp[1] = temp;
}
void _f_round() {
fp[0] = floor(fp[0] + 0.5);
}
void _f_swap() {
register Real temp = fp[0];
fp[0] = fp[1];
fp[1] = temp;
}
void _f_variable() {
create_definition(A_FVARIABLE);
compile_real(0.0);
mark_word(_last);
}
void _represent() {
register Real x = *fp++;
register int m;
register int sign = 0;
static char buf[128];
if (x < 0.0) {
sign = 1;
x = -x;
}
if (x != 0.0) {
m = (int) floor(log10(x)) + 1;
x /= pow(10, m);
if (x >= 1.0) {
x /= 10;
m++;
}
} else m = 0;
sprintf(buf, "%0.*f", sp[0], x);
strncpy((Char *) sp[1], buf + 2, sp[0]);
sp--;
sp[2] = m;
sp[1] = FFLAG(sign);
sp[0] = FFLAG(1);
}
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