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-rw-r--r--src/libfmt/fltfmt.c610
1 files changed, 0 insertions, 610 deletions
diff --git a/src/libfmt/fltfmt.c b/src/libfmt/fltfmt.c
deleted file mode 100644
index 234f03d9..00000000
--- a/src/libfmt/fltfmt.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- * The authors of this software are Rob Pike and Ken Thompson.
- * Copyright (c) 2002 by Lucent Technologies.
- * Permission to use, copy, modify, and distribute this software for any
- * purpose without fee is hereby granted, provided that this entire notice
- * is included in all copies of any software which is or includes a copy
- * or modification of this software and in all copies of the supporting
- * documentation for such software.
- * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
- * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
- * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
- */
-#include <stdio.h>
-#include <math.h>
-#include <float.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <stdarg.h>
-#include "fmt.h"
-#include "fmtdef.h"
-#include "nan.h"
-
-enum
-{
- FDEFLT = 6,
- NSIGNIF = 17
-};
-
-/*
- * first few powers of 10, enough for about 1/2 of the
- * total space for doubles.
- */
-static double pows10[] =
-{
- 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
- 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
- 1e20, 1e21, 1e22, 1e23, 1e24, 1e25, 1e26, 1e27, 1e28, 1e29,
- 1e30, 1e31, 1e32, 1e33, 1e34, 1e35, 1e36, 1e37, 1e38, 1e39,
- 1e40, 1e41, 1e42, 1e43, 1e44, 1e45, 1e46, 1e47, 1e48, 1e49,
- 1e50, 1e51, 1e52, 1e53, 1e54, 1e55, 1e56, 1e57, 1e58, 1e59,
- 1e60, 1e61, 1e62, 1e63, 1e64, 1e65, 1e66, 1e67, 1e68, 1e69,
- 1e70, 1e71, 1e72, 1e73, 1e74, 1e75, 1e76, 1e77, 1e78, 1e79,
- 1e80, 1e81, 1e82, 1e83, 1e84, 1e85, 1e86, 1e87, 1e88, 1e89,
- 1e90, 1e91, 1e92, 1e93, 1e94, 1e95, 1e96, 1e97, 1e98, 1e99,
- 1e100, 1e101, 1e102, 1e103, 1e104, 1e105, 1e106, 1e107, 1e108, 1e109,
- 1e110, 1e111, 1e112, 1e113, 1e114, 1e115, 1e116, 1e117, 1e118, 1e119,
- 1e120, 1e121, 1e122, 1e123, 1e124, 1e125, 1e126, 1e127, 1e128, 1e129,
- 1e130, 1e131, 1e132, 1e133, 1e134, 1e135, 1e136, 1e137, 1e138, 1e139,
- 1e140, 1e141, 1e142, 1e143, 1e144, 1e145, 1e146, 1e147, 1e148, 1e149,
- 1e150, 1e151, 1e152, 1e153, 1e154, 1e155, 1e156, 1e157, 1e158, 1e159,
-};
-
-static double
-pow10(int n)
-{
- double d;
- int neg;
-
- neg = 0;
- if(n < 0){
- if(n < DBL_MIN_10_EXP){
- return 0.;
- }
- neg = 1;
- n = -n;
- }else if(n > DBL_MAX_10_EXP){
- return HUGE_VAL;
- }
- if(n < (int)(sizeof(pows10)/sizeof(pows10[0])))
- d = pows10[n];
- else{
- d = pows10[sizeof(pows10)/sizeof(pows10[0]) - 1];
- for(;;){
- n -= sizeof(pows10)/sizeof(pows10[0]) - 1;
- if(n < (int)(sizeof(pows10)/sizeof(pows10[0]))){
- d *= pows10[n];
- break;
- }
- d *= pows10[sizeof(pows10)/sizeof(pows10[0]) - 1];
- }
- }
- if(neg){
- return 1./d;
- }
- return d;
-}
-
-static int
-xadd(char *a, int n, int v)
-{
- char *b;
- int c;
-
- if(n < 0 || n >= NSIGNIF)
- return 0;
- for(b = a+n; b >= a; b--) {
- c = *b + v;
- if(c <= '9') {
- *b = c;
- return 0;
- }
- *b = '0';
- v = 1;
- }
- *a = '1'; /* overflow adding */
- return 1;
-}
-
-static int
-xsub(char *a, int n, int v)
-{
- char *b;
- int c;
-
- for(b = a+n; b >= a; b--) {
- c = *b - v;
- if(c >= '0') {
- *b = c;
- return 0;
- }
- *b = '9';
- v = 1;
- }
- *a = '9'; /* underflow subtracting */
- return 1;
-}
-
-static void
-xaddexp(char *p, int e)
-{
- char se[9];
- int i;
-
- *p++ = 'e';
- if(e < 0) {
- *p++ = '-';
- e = -e;
- }
- i = 0;
- while(e) {
- se[i++] = e % 10 + '0';
- e /= 10;
- }
- if(i == 0) {
- *p++ = '0';
- } else {
- while(i > 0)
- *p++ = se[--i];
- }
- *p++ = '\0';
-}
-
-static char*
-xdodtoa(char *s1, double f, int chr, int prec, int *decpt, int *rsign)
-{
- char s2[NSIGNIF+10];
- double g, h;
- int e, d, i;
- int c2, sign, oerr;
-
- if(chr == 'F')
- chr = 'f';
- if(prec > NSIGNIF)
- prec = NSIGNIF;
- if(prec < 0)
- prec = 0;
- if(__isNaN(f)) {
- *decpt = 9999;
- *rsign = 0;
- strcpy(s1, "nan");
- return &s1[3];
- }
- sign = 0;
- if(f < 0) {
- f = -f;
- sign++;
- }
- *rsign = sign;
- if(__isInf(f, 1) || __isInf(f, -1)) {
- *decpt = 9999;
- strcpy(s1, "inf");
- return &s1[3];
- }
-
- e = 0;
- g = f;
- if(g != 0) {
- frexp(f, &e);
- e = (int)(e * .301029995664);
- if(e >= -150 && e <= +150) {
- d = 0;
- h = f;
- } else {
- d = e/2;
- h = f * pow10(-d);
- }
- g = h * pow10(d-e);
- while(g < 1) {
- e--;
- g = h * pow10(d-e);
- }
- while(g >= 10) {
- e++;
- g = h * pow10(d-e);
- }
- }
-
- /*
- * convert NSIGNIF digits and convert
- * back to get accuracy.
- */
- for(i=0; i<NSIGNIF; i++) {
- d = (int)g;
- s1[i] = d + '0';
- g = (g - d) * 10;
- }
- s1[i] = 0;
-
- /*
- * try decimal rounding to eliminate 9s
- */
- c2 = prec + 1;
- if(chr == 'f')
- c2 += e;
- oerr = errno;
- if(c2 >= NSIGNIF-2) {
- strcpy(s2, s1);
- d = e;
- s1[NSIGNIF-2] = '0';
- s1[NSIGNIF-1] = '0';
- xaddexp(s1+NSIGNIF, e-NSIGNIF+1);
- g = fmtstrtod(s1, nil);
- if(g == f)
- goto found;
- if(xadd(s1, NSIGNIF-3, 1)) {
- e++;
- xaddexp(s1+NSIGNIF, e-NSIGNIF+1);
- }
- g = fmtstrtod(s1, nil);
- if(g == f)
- goto found;
- strcpy(s1, s2);
- e = d;
- }
-
- /*
- * convert back so s1 gets exact answer
- */
- for(d = 0; d < 10; d++) {
- xaddexp(s1+NSIGNIF, e-NSIGNIF+1);
- g = fmtstrtod(s1, nil);
- if(f > g) {
- if(xadd(s1, NSIGNIF-1, 1))
- e--;
- continue;
- }
- if(f < g) {
- if(xsub(s1, NSIGNIF-1, 1))
- e++;
- continue;
- }
- break;
- }
-
-found:
- errno = oerr;
-
- /*
- * sign
- */
- d = 0;
- i = 0;
-
- /*
- * round & adjust 'f' digits
- */
- c2 = prec + 1;
- if(chr == 'f'){
- if(xadd(s1, c2+e, 5))
- e++;
- c2 += e;
- if(c2 < 0){
- c2 = 0;
- e = -prec - 1;
- }
- }else{
- if(xadd(s1, c2, 5))
- e++;
- }
- if(c2 > NSIGNIF){
- c2 = NSIGNIF;
- }
-
- *decpt = e + 1;
-
- /*
- * terminate the converted digits
- */
- s1[c2] = '\0';
- return &s1[c2];
-}
-
-/*
- * this function works like the standard dtoa, if you want it.
- */
-#if 0
-static char*
-__dtoa(double f, int mode, int ndigits, int *decpt, int *rsign, char **rve)
-{
- static char s2[NSIGNIF + 10];
- char *es;
- int chr, prec;
-
- switch(mode) {
- /* like 'e' */
- case 2:
- case 4:
- case 6:
- case 8:
- chr = 'e';
- break;
- /* like 'g' */
- case 0:
- case 1:
- default:
- chr = 'g';
- break;
- /* like 'f' */
- case 3:
- case 5:
- case 7:
- case 9:
- chr = 'f';
- break;
- }
-
- if(chr != 'f' && ndigits){
- ndigits--;
- }
- prec = ndigits;
- if(prec > NSIGNIF)
- prec = NSIGNIF;
- if(ndigits == 0)
- prec = NSIGNIF;
- es = xdodtoa(s2, f, chr, prec, decpt, rsign);
-
- /*
- * strip trailing 0
- */
- for(; es > s2 + 1; es--){
- if(es[-1] != '0'){
- break;
- }
- }
- *es = '\0';
- if(rve != NULL)
- *rve = es;
- return s2;
-}
-#endif
-
-static int
-fmtzdotpad(Fmt *f, int n, int pt)
-{
- char *t, *s;
- int i;
- Rune *rt, *rs;
-
- if(f->runes){
- rt = (Rune*)f->to;
- rs = (Rune*)f->stop;
- for(i = 0; i < n; i++){
- if(i == pt){
- FMTRCHAR(f, rt, rs, '.');
- }
- FMTRCHAR(f, rt, rs, '0');
- }
- f->nfmt += rt - (Rune*)f->to;
- f->to = rt;
- }else{
- t = (char*)f->to;
- s = (char*)f->stop;
- for(i = 0; i < n; i++){
- if(i == pt){
- FMTCHAR(f, t, s, '.');
- }
- FMTCHAR(f, t, s, '0');
- }
- f->nfmt += t - (char *)f->to;
- f->to = t;
- }
- return 0;
-}
-
-int
-__efgfmt(Fmt *fmt)
-{
- double f;
- char s1[NSIGNIF+10];
- int e, d, n;
- int c1, c2, c3, c4, ucase, sign, chr, prec, fl;
-
- f = va_arg(fmt->args, double);
- prec = FDEFLT;
- fl = fmt->flags;
- fmt->flags = 0;
- if(fl & FmtPrec)
- prec = fmt->prec;
- chr = fmt->r;
- ucase = 0;
- if(chr == 'E'){
- chr = 'e';
- ucase = 1;
- }else if(chr == 'F'){
- chr = 'f';
- ucase = 1;
- }else if(chr == 'G'){
- chr = 'g';
- ucase = 1;
- }
- if(prec > 0 && chr == 'g')
- prec--;
- if(prec < 0)
- prec = 0;
-
- xdodtoa(s1, f, chr, prec, &e, &sign);
- e--;
- if(*s1 == 'i' || *s1 == 'n'){
- if(ucase){
- if(*s1 == 'i'){
- strcpy(s1, "INF");
- }else{
- strcpy(s1, "NAN");
- }
- }
- fmt->flags = fl & (FmtWidth|FmtLeft);
- return __fmtcpy(fmt, (const void*)s1, 3, 3);
- }
-
- /*
- * copy into final place
- * c1 digits of leading '0'
- * c2 digits from conversion
- * c3 digits of trailing '0'
- * c4 digits after '.'
- */
- c1 = 0;
- c2 = prec + 1;
- c3 = 0;
- c4 = prec;
- switch(chr) {
- default:
- chr = 'e';
- break;
- case 'g':
- /*
- * decide on 'e' of 'f' style convers
- */
- if(e >= -4 && e <= prec) {
- c1 = -e;
- c4 = prec - e;
- chr = 'h'; /* flag for 'f' style */
- }
- break;
- case 'f':
- c1 = -e;
- if(c1 > prec)
- c1 = prec + 1;
- c2 += e;
- break;
- }
-
- /*
- * clean up c1 c2 and c3
- */
- if(c1 < 0)
- c1 = 0;
- if(c2 < 0)
- c2 = 0;
- if(c2 > NSIGNIF) {
- c3 = c2-NSIGNIF;
- c2 = NSIGNIF;
- }
-
- /*
- * trim trailing zeros for %g
- */
- if(!(fl & FmtSharp)
- && (chr == 'g' || chr == 'h')){
- if(c4 >= c3){
- c4 -= c3;
- c3 = 0;
- }else{
- c3 -= c4;
- c4 = 0;
- }
- while(c4 && c2 > 1 && s1[c2 - 1] == '0'){
- c4--;
- c2--;
- }
- }
-
- /*
- * calculate the total length
- */
- n = c1 + c2 + c3;
- if(sign || (fl & (FmtSign|FmtSpace)))
- n++;
- if(c4 || (fl & FmtSharp)){
- n++;
- }
- if(chr == 'e' || chr == 'g'){
- n += 4;
- if(e >= 100)
- n++;
- }
-
- /*
- * pad to width if right justified
- */
- if((fl & (FmtWidth|FmtLeft)) == FmtWidth && n < fmt->width){
- if(fl & FmtZero){
- c1 += fmt->width - n;
- }else{
- if(__fmtpad(fmt, fmt->width - n) < 0){
- return -1;
- }
- }
- }
-
- /*
- * sign
- */
- d = 0;
- if(sign)
- d = '-';
- else if(fl & FmtSign)
- d = '+';
- else if(fl & FmtSpace)
- d = ' ';
- if(d && fmtrune(fmt, d) < 0){
- return -1;
- }
-
- /*
- * copy digits
- */
- c4 = c1 + c2 + c3 - c4;
- if(c1 > 0){
- if(fmtzdotpad(fmt, c1, c4) < 0){
- return -1;
- }
- c4 -= c1;
- }
- d = 0;
- if(c4 >= 0 && c4 < c2){
- if(__fmtcpy(fmt, s1, c4, c4) < 0 || fmtrune(fmt, '.') < 0)
- return -1;
- d = c4;
- c2 -= c4;
- c4 = -1;
- }
- if(__fmtcpy(fmt, (const void*)(s1 + d), c2, c2) < 0){
- return -1;
- }
- c4 -= c2;
- if(c3 > 0){
- if(fmtzdotpad(fmt, c3, c4) < 0){
- return -1;
- }
- c4 -= c3;
- }
-
- /*
- * strip trailing '0' on g conv
- */
- if((fl & FmtSharp) && c4 == 0 && fmtrune(fmt, '.') < 0){
- return -1;
- }
- if(chr == 'e' || chr == 'g') {
- d = 0;
- if(ucase)
- s1[d++] = 'E';
- else
- s1[d++] = 'e';
- c1 = e;
- if(c1 < 0) {
- s1[d++] = '-';
- c1 = -c1;
- } else
- s1[d++] = '+';
- if(c1 >= 100) {
- s1[d++] = c1/100 + '0';
- c1 = c1%100;
- }
- s1[d++] = c1/10 + '0';
- s1[d++] = c1%10 + '0';
- if(__fmtcpy(fmt, s1, d, d) < 0){
- return -1;
- }
- }
- if((fl & (FmtWidth|FmtLeft)) == (FmtWidth|FmtLeft) && n < fmt->width){
- if(__fmtpad(fmt, fmt->width - n) < 0){
- return -1;
- }
- }
- return 0;
-}
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