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printf.c0
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printf.c0
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/****************************************************************
Copyright (C) 1997, 1999, 2001 Lucent Technologies
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of Lucent or any of its entities
not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
****************************************************************/
/* This implements most of ANSI C's printf, fprintf, and sprintf,
* omitting L, with %.0g and %.0G giving the shortest decimal string
* that rounds to the number being converted, and with negative
* precisions allowed for %f.
*/
#ifdef KR_headers
#include "varargs.h"
#else
#include "stddef.h"
#include "stdarg.h"
#include "stdlib.h"
#endif
#ifdef Use_GDTOA_for_i386_long_double /*{{*/
#include "gdtoa.h"
#else /*}{*/
#ifndef NO_PRINTF_A_FMT /*{*/
#include "gdtoa.h"
#endif /*}*/
#endif /*}}*/
#ifdef __i386
#define NO_GDTOA_i386_Quad
#endif
#ifdef Use_GDTOA_for_i386_long_double /*{*/
#ifndef NO_GDTOA_i386_Quad /*{*/
#define GDTOA_both
#define Use_GDTOA_Qtype
#ifdef __ICC__ /* or __INTEL_COMPILER__ or __INTEL_COMPILER ?? */
#define GDTOA_Qtype _Quad
#else
#define GDTOA_Qtype __float128
#endif
#endif /*} NO_GDTOA_i386_Quad */
#endif /*} Use_GDTOA_for_i386_long_double */
#ifdef Use_GDTOA_Qtype /*{*/
#ifndef GDTOA_H_INCLUDED
#include "gdtoa.h"
#endif
#ifndef GDTOA_Qtype
#define GDTOA_Qtype long double
#endif
#endif /*}*/
#ifndef GDTOA_H_INCLUDED /*{*/
enum { /* return values from strtodg */
STRTOG_Zero = 0,
STRTOG_Normal = 1,
STRTOG_Denormal = 2,
STRTOG_Infinite = 3,
STRTOG_NaN = 4,
STRTOG_NaNbits = 5,
STRTOG_NoNumber = 6,
STRTOG_Retmask = 7};
typedef struct
FPI {
int nbits;
int emin;
int emax;
int rounding;
int sudden_underflow;
} FPI;
enum { /* FPI.rounding values: same as FLT_ROUNDS */
FPI_Round_zero = 0,
FPI_Round_near = 1,
FPI_Round_up = 2,
FPI_Round_down = 3
};
#endif /*}*/
#ifdef NO_PRINTF_A_FMT /*{{*/
#define WANT_A_FMT(x) /*nothing*/
#else /*}{*/
#define WANT_A_FMT(x) x
#endif /*}}*/
#include "stdio1.h"
#include "string.h"
#include "errno.h"
typedef struct
Finfo {
union { FILE *cf; char *sf; } u;
char *ob0, *obe1;
size_t lastlen;
} Finfo;
typedef char *(*pgdtoa) ANSI((FPI*, int be, ULong *bits, int *kind, int mode, int ndigits, int *decpt, char **rve));
typedef struct
FPBits {
ULong bits[4]; /* sufficient for quad; modify if considering wider types */
FPI *fpi;
pgdtoa gdtoa;
int sign;
int ex; /* exponent */
int kind;
} FPBits;
typedef union U
{
double d;
long double ld;
#ifdef GDTOA_Qtype
GDTOA_Qtype Qd;
#endif
unsigned int ui[4];
unsigned short us[5];
} U;
typedef char *(*Putfunc) ANSI((Finfo*, int*));
typedef void (*Fpbits) ANSI((U*, FPBits*));
/* Would have preferred typedef void (*Fpbits)(va_list*, FPBits*)
* but gcc is buggy in this regard.
*/
#ifdef Use_GDTOA_for_i386_long_double /*{*/
#ifdef IEEE_MC68k
#define _0 0
#define _1 1
#define _2 2
#define _3 3
#define _4 4
#endif
#ifdef IEEE_8087
#define _0 4
#define _1 3
#define _2 2
#define _3 1
#define _4 0
#endif
static void
xfpbits(U *u, FPBits *b)
{
ULong *bits;
int ex, i;
static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, 0 };
b->fpi = &fpi0;
b->gdtoa = gdtoa;
b->sign = u->us[_0] & 0x8000;
bits = b->bits;
bits[1] = (u->us[_1] << 16) | u->us[_2];
bits[0] = (u->us[_3] << 16) | u->us[_4];
if ( (ex = u->us[_0] & 0x7fff) !=0) {
i = STRTOG_Normal;
if (ex == 0x7fff)
/* Infinity or NaN */
i = bits[0] | bits[1] ? STRTOG_NaN : STRTOG_Infinite;
}
else if (bits[0] | bits[1]) {
i = STRTOG_Denormal;
ex = 1;
}
else
i = STRTOG_Zero;
b->kind = i;
b->ex = ex - (0x3fff + 63);
}
#undef _0
#undef _1
#undef _2
#undef _3
#undef _4
#define GDTOA_LD_fpbits xfpbits
#endif /*} Use_GDTOA_for_i386_long_double */
#ifdef Use_GDTOA_Qtype /*{*/
#include "gdtoa.h"
#ifndef GDTOA_Qtype
#define GDTOA_Qtype long double
#endif
#ifdef GDTOA_LD_fpbits
#define GDTOA_Q_fpbits Qfpbits
#else
#define GDTOA_LD_fpbits Qfpbits
#endif
#ifdef IEEE_MC68k
#define _0 0
#define _1 1
#define _2 2
#define _3 3
#endif
#ifdef IEEE_8087
#define _0 3
#define _1 2
#define _2 1
#define _3 0
#endif
static void
Qfpbits(U *u, FPBits *b)
{
ULong *bits;
int ex, i;
static FPI fpi0 = { 113, 1-16383-113+1, 32766 - 16383 - 113 + 1, 1, 0 };
b->fpi = &fpi0;
b->gdtoa = gdtoa;
b->sign = u->ui[_0] & 0x80000000L;
bits = b->bits;
bits[3] = u->ui[_0] & 0xffff;
bits[2] = u->ui[_1];
bits[1] = u->ui[_2];
bits[0] = u->ui[_3];
if ( (ex = (u->ui[_0] & 0x7fff0000L) >> 16) !=0) {
if (ex == 0x7fff) {
/* Infinity or NaN */
i = bits[0] | bits[1] | bits[2] | bits[3]
? STRTOG_NaN : STRTOG_Infinite;
}
else {
i = STRTOG_Normal;
bits[3] |= 0x10000;
}
}
else if (bits[0] | bits[1] | bits[2] | bits[3]) {
i = STRTOG_Denormal;
ex = 1;
}
else
i = STRTOG_Zero;
b->kind = i;
b->ex = ex - (0x3fff + 112);
}
#undef _0
#undef _1
#undef _2
#undef _3
#endif /*} GDTOA_Qtype */
#ifdef KR_headers
#define Const /* const */
#define Voidptr char*
#ifndef size_t__
#define size_t int
#define size_t__
#endif
#else
#define Const const
#define Voidptr void*
#endif
#undef MESS
#ifndef Stderr
#define Stderr stderr
#endif
#ifdef _windows_
#undef PF_BUF
#define MESS
#include "mux0.h"
#define stdout_or_err(f) (f == stdout)
#else
#define stdout_or_err(f) (f == Stderr || f == stdout)
#endif
#ifdef __cplusplus
extern "C" {
#endif
extern char *dtoa ANSI((double, int, int, int*, int*, char **));
extern void freedtoa ANSI((char*));
#ifdef USE_ULDIV
/* This is for avoiding 64-bit divisions on the DEC Alpha, since */
/* they are not portable among variants of OSF1 (DEC's Unix). */
#define ULDIV(a,b) uldiv_ASL(a,(unsigned long)(b))
#ifndef LLBITS
#define LLBITS 6
#endif
#ifndef ULONG
#define ULONG unsigned long
#endif
static int
klog(ULONG x)
{
int k, rv = 0;
if (x > 1L)
for(k = 1 << LLBITS-1;;) {
if (x >= (1L << k)) {
rv |= k;
x >>= k;
}
if (!(k >>= 1))
break;
}
return rv;
}
ULONG
uldiv_ASL(ULONG a, ULONG b)
{
int ka;
ULONG c, k;
static ULONG b0;
static int kb;
if (a < b)
return 0;
if (b != b0) {
b0 = b;
kb = klog(b);
}
k = 1;
if ((ka = klog(a) - kb) > 0) {
k <<= ka;
b <<= ka;
}
c = 0;
for(;;) {
if (a >= b) {
a -= b;
c |= k;
}
if (!(k >>= 1))
break;
a <<= 1;
}
return c;
}
#else
#define ULDIV(a,b) a / b
#endif /* USE_ULDIV */
#ifdef PF_BUF
FILE *stderr_ASL = (FILE*)&stderr_ASL;
void (*pfbuf_print_ASL) ANSI((char*));
char *pfbuf_ASL;
static char *pfbuf_next;
static size_t pfbuf_len;
extern Char *mymalloc_ASL ANSI((size_t));
extern Char *myralloc_ASL ANSI((void *, size_t));
#undef fflush
#ifdef old_fflush_ASL
#define fflush old_fflush_ASL
#endif
void
fflush_ASL(FILE *f)
{
if (f == stderr_ASL) {
if (pfbuf_ASL && pfbuf_print_ASL) {
(*pfbuf_print_ASL)(pfbuf_ASL);
free(pfbuf_ASL);
pfbuf_ASL = 0;
}
}
else
fflush(f);
}
static void
pf_put(char *buf, int len)
{
size_t x, y;
if (!pfbuf_ASL) {
x = len + 256;
if (x < 512)
x = 512;
pfbuf_ASL = pfbuf_next = (char*)mymalloc_ASL(pfbuf_len = x);
}
else if ((y = (pfbuf_next - pfbuf_ASL) + len) >= pfbuf_len) {
x = pfbuf_len;
while((x <<= 1) <= y);
y = pfbuf_next - pfbuf_ASL;
pfbuf_ASL = (char*)myralloc_ASL(pfbuf_ASL, x);
pfbuf_next = pfbuf_ASL + y;
pfbuf_len = x;
}
memcpy(pfbuf_next, buf, len);
pfbuf_next += len;
*pfbuf_next = 0;
}
static char *
pfput(Finfo *f, int *rvp)
{
int n;
char *ob0 = f->ob0;
*rvp += n = (int)(f->obe1 - ob0);
pf_put(ob0, n);
return ob0;
}
#endif /* PF_BUF */
static char *
Fput
#ifdef KR_headers
(f, rvp) Finfo *f; int *rvp;
#else
(Finfo *f, int *rvp)
#endif
{
char *ob0 = f->ob0;
*rvp += f->obe1 - ob0;
*f->obe1 = 0;
fputs(ob0, f->u.cf);
return ob0;
}
#ifdef _windows_
int stdout_fileno_ASL = 1;
static char *
Wput
#ifdef KR_headers
(f, rvp) Finfo *f; int *rvp;
#else
(Finfo *f, int *rvp)
#endif
{
char *ob0 = f->ob0;
*rvp += f->obe1 - ob0;
*f->obe1 = 0;
mwrite(ob0, f->obe1 - ob0);
return ob0;
}
#endif /*_windows_*/
#ifdef IEEE_MC68k
#define _0 0
#define _1 1
#endif
#ifdef IEEE_8087
#define _0 1
#define _1 0
#endif
static void
dfpbits(U *u, FPBits *b)
{
ULong *bits;
int ex, i;
static FPI fpi0 = { 53, 1-1023-53+1, 2046-1023-53+1, 1, 0 };
b->fpi = &fpi0;
b->gdtoa = gdtoa;
b->sign = u->ui[_0] & 0x80000000L;
bits = b->bits;
bits[1] = u->ui[_0] & 0xfffff;
bits[0] = u->ui[_1];
if ( (ex = (u->ui[_0] & 0x7ff00000L) >> 20) !=0) {
if (ex == 0x7ff) {
/* Infinity or NaN */
i = bits[0] | bits[1] ? STRTOG_NaN : STRTOG_Infinite;
}
else {
i = STRTOG_Normal;
bits[1] |= 0x100000;
}
}
else if (bits[0] | bits[1]) {
i = STRTOG_Denormal;
ex = 1;
}
else
i = STRTOG_Zero;
b->kind = i;
b->ex = ex - (0x3ff + 52);
}
#undef _0
#undef _1
#ifdef Honor_FLT_ROUNDS /*{{*/
#ifdef Trust_FLT_ROUNDS /*{{*/
#define RoundCheck if (Rounding == -1) Rounding = Flt_Rounds; if (Rounding != 1){\
fpi1 = *fpb.fpi; fpi1.rounding = Rounding; fpb.fpi = &fpi1;}
#else /*}{*/
#define RoundCheck if (Rounding == -1) { Rounding = 1; switch((fegetround()) {\
case FE_TOWARDZERO: Rounding = 0; break;\
case FE_UPWARD: Rounding = 2; break;\
case FE_DOWNWARD: Rounding = 3; }}\
if (Rounding != 1){\
fpi1 = *fpb.fpi; fpi1.rounding = Rounding; fpb.fpi = &fpi1;}
#endif /*}}*/
#else /*}{*/
#define RoundCheck /*nothing*/
#endif /*}}*/
#ifndef NO_PRINTF_A_FMT /*{*/
static int
fpiprec(FPBits *b) /* return number of hex digits minus 1, or 0 for zero */
{
FPI *fpi;
ULong *bits;
int i, j, k, m;
if (b->kind == STRTOG_Zero)
return b->ex = 0;
fpi = b->fpi;
bits = b->bits;
for(k = (fpi->nbits - 1) >> 2; k > 0; --k)
if ((bits[k >> 3] >> 4*(k & 7)) & 0xf) {
m = k >> 3;
for(i = 0; i <= m; ++i)
if (bits[i]) {
if (i > 0) {
k -= 8*i;
b->ex += 32*i;
for(j = i; j <= m; ++j)
bits[j-i] = bits[j];
}
break;
}
for(i = 0; i < 28 && !((bits[0] >> i) & 0xf); i += 4);
if (i) {
b->ex += i;
m = k >> 3;
k -= (i >> 2);
for(j = 0;;++j) {
bits[j] >>= i;
if (j == m)
break;
bits[j] |= bits[j+1] << (32 - i);
}
}
break;
}
return k;
}
static int
bround(FPBits *b, int prec, int prec1) /* round to prec hex digits after the "." */
{ /* prec1 = incoming precision (after ".") */
FPI *fpi = b->fpi;
ULong *bits, t;
int i, inc, j, k, m, n;
#ifdef Honor_FLT_ROUNDS
int rounding = fpi->rounding;
if (rounding > FPI_Round_near && b->sign)
rounding = FPI_Round_up + FPI_Round_down - rounding;
if (rounding == FPI_Round_down)
rounding = FPI_Round_zero;
#endif
m = prec1 - prec;
bits = b->bits;
inc = 0;
#ifdef Honor_FLT_ROUNDS
switch(rounding) {
case FPI_Round_up:
for(i = 0; i < m; i += 8)
if (bits[i>>3])
goto inc1;
if ((j = i - m) > 0 && bits[(i-8)>>3] << j*4)
goto inc1;
break;
case FPI_Round_near:
#endif
k = m - 1;
if ((t = bits[k >> 3] >> (j = (k&7)*4)) & 8) {
if (t & 7)
goto inc1;
if (j && bits[k >> 3] << (32 - j))
goto inc1;
while(k >= 8) {
k -= 8;
if (bits[k>>3]) {
inc1:
inc = 1;
goto haveinc;
}
}
}
#ifdef Honor_FLT_ROUNDS
}
#endif
haveinc:
b->ex += m*4;
i = m >> 3;
k = prec1 >> 3;
j = i;
if ((n = 4*(m & 7)))
for(;; ++j) {
bits[j-i] = bits[j] >> n;
if (j == k)
break;
bits[j-i] |= bits[j+1] << (32-n);
}
else
for(;; ++j) {
bits[j-i] = bits[j];
if (j == k)
break;
}
k = prec >> 3;
if (inc) {
for(j = 0; !(++bits[j] & 0xffffffff); ++j);
if (j > k) {
onebit:
bits[0] = 1;
b->ex += 4*prec;
return 1;
}
if ((j = prec & 7) < 7 && bits[k] >> (j+1)*4)
goto onebit;
}
for(i = 0; !(bits[i >> 3] & (0xf << 4*(i&7))); ++i);
if (i) {
b->ex += 4*i;
prec -= i;
j = i >> 3;
i &= 7;
i *= 4;
for(m = j; ; ++m) {
bits[m-j] = bits[m] >> i;
if (m == k)
break;
bits[m-j] |= bits[m+1] << (32 - i);
}
}
return prec;
}
#endif /*}NO_PRINTF_A_FMT*/
#define put(x) { *outbuf++ = x; if (outbuf == obe) outbuf = (*fput)(f,&rv); }
static int
x_sprintf
#ifdef KR_headers
(obe, fput, f, fmt, ap)
char *obe, *fmt; Finfo *f; Putfunc fput; va_list ap;
#else
(char *obe, Putfunc fput, Finfo *f, const char *fmt, va_list ap)
#endif
{
FPBits fpb;
Fpbits fpbits;
U u;
char *digits, *ob0, *outbuf, *s, *s0, *se;
Const char *fmt0;
char buf[32];
long i;
unsigned long j, ul;
double x;
int alt, base, c, decpt, dot, conv, i1, k, lead0, left,
len, prec, prec1, psign, rv, sign, width;
long Ltmp, *ip;
short sh;
unsigned short us;
unsigned int ui;
#ifdef Honor_FLT_ROUNDS
FPI fpi1;
int Rounding = -1;
#endif
#ifndef NO_PRINTF_A_FMT /*{*/
int bex, bw;
#endif /*} NO_PRINTF_A_FMT */
static char hex[] = "0123456789abcdefpx";
static char Hex[] = "0123456789ABCDEFPX";
ob0 = outbuf = f->ob0;
rv = 0;
for(;;) {
for(;;) {
switch(c = *fmt++) {
case 0:
goto done;
case '%':
break;
default:
put(c)
continue;
}
break;
}
alt=dot=lead0=left=len=prec=psign=sign=width=0;
fpbits = dfpbits;
fmt0 = fmt;
fmtloop:
switch(conv = *fmt++) {
case ' ':
case '+':
sign = conv;
goto fmtloop;
case '-':
if (dot)
psign = 1;
else
left = 1;
goto fmtloop;
case '#':
alt = 1;
goto fmtloop;
case '0':
if (!lead0 && !dot) {
lead0 = 1;
goto fmtloop;
}
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
k = conv - '0';
while((c = *fmt) >= '0' && c <= '9') {
k = 10*k + c - '0';
fmt++;
}
if (dot)
prec = psign ? -k : k;
else
width = k;
goto fmtloop;
case 'h':
len = 2;
goto fmtloop;
case 'L':
#ifdef GDTOA_LD_fpbits /*{*/
fpbits = GDTOA_LD_fpbits;
#ifdef GDTOA_Q_fpbits
if (*fmt == 'q') {
++fmt;
fpbits = Qfpbits;
}
#endif
#endif /*}*/
goto fmtloop;
case 'l':
len = 1;
goto fmtloop;
case '.':
dot = 1;
goto fmtloop;
case '*':
k = va_arg(ap, int);
if (dot)
prec = k;
else {
if (k < 0) {
sign = '-';
k = -k;
}
width = k;
}
goto fmtloop;
case 'c':
c = va_arg(ap, int);
put(c)
continue;
case '%':
put(conv)
continue;
case 'u':
switch(len) {
case 0:
ui = va_arg(ap, int);
i = ui;
break;
case 1:
i = va_arg(ap, long);
break;
case 2:
us = va_arg(ap, int);
i = us;
}
sign = 0;
goto have_i;
case 'i':
case 'd':
switch(len) {
case 0:
k = va_arg(ap, int);
i = k;
break;
case 1:
i = va_arg(ap, long);
break;
case 2:
sh = va_arg(ap, int);
i = sh;
}
if (i < 0) {
sign = '-';
i = -i;
}
have_i:
base = 10;
ul = i;
digits = hex;
baseloop:
if (dot)
lead0 = 0;
s = buf;
if (!ul)
alt = 0;
do {
j = ULDIV(ul, base);
*s++ = digits[ul - base*j];
}
while((ul = j));
prec -= c = s - buf;
if (alt && conv == 'o' && prec <= 0)
prec = 1;
if ((width -= c) > 0) {
if (prec > 0)
width -= prec;
if (sign)
width--;
if (alt == 2)
width--;
}
if (left) {
if (alt == 2)
put('0') /* for 0x */
if (sign)
put(sign)
while(--prec >= 0)
put('0')
do put(*--s)
while(s > buf);
while(--width >= 0)
put(' ')
continue;
}
if (width > 0) {
if (lead0) {
if (alt == 2)
put('0')
if (sign)
put(sign)
while(--width >= 0)
put('0')
goto s_loop;
}
else
while(--width >= 0)
put(' ')
}
if (alt == 2)
put('0')
if (sign)
put(sign)
s_loop:
while(--prec >= 0)
put('0')
do put(*--s)
while(s > buf);
continue;
case 'n':
ip = va_arg(ap, long*);
if (!ip)
ip = &Ltmp;
c = outbuf - ob0 + rv;
switch(len) {
case 0:
*(int*)ip = c;
break;
case 1:
*ip = c;
break;
case 2:
*(short*)ip = c;
}
break;
case 'p':
len = alt = 1;
/* no break */
case 'x':
digits = hex;
goto more_x;
case 'X':
digits = Hex;
more_x:
if (alt) {
alt = 2;
sign = conv;
}
else
sign = 0;
base = 16;
get_u:
switch(len) {
case 0:
ui = va_arg(ap, int);
ul = ui;
break;
case 1:
ul = va_arg(ap, long);
break;
case 2:
us = va_arg(ap, int);
ul = us;
}
if (!ul)
sign = alt = 0;
goto baseloop;
case 'o':
base = 8;
digits = hex;
goto get_u;
case 's':
s0 = 0;
s = va_arg(ap, char*);
if (!s)
s = "<NULL>";
if (prec < 0)
prec = 0;
have_s:
if (dot) {
for(c = 0; c < prec; c++)
if (!s[c])
break;
prec = c;
}
else
prec = strlen(s);
width -= prec;
if (!left)
while(--width >= 0)
put(' ')
while(--prec >= 0)
put(*s++)
while(--width >= 0)
put(' ')
if (s0)
freedtoa(s0);
continue;
case 'f':
if (!dot)
prec = 6;
#ifdef GDTOA_H_INCLUDED
if (fpbits == dfpbits) {
#endif
x = va_arg(ap, double);
s = s0 = dtoa(x, 3, prec, &decpt, &fpb.sign, &se);
#ifdef GDTOA_H_INCLUDED
}
else {
#ifdef GDTOA_both
if (fpbits == GDTOA_LD_fpbits)
u.ld = va_arg(ap, long double);
else
u.Qd = va_arg(ap, GDTOA_Qtype);
#else
u.ld = va_arg(ap, long double);
#endif
fpbits(&u, &fpb);
RoundCheck
s = s0 = fpb.gdtoa(fpb.fpi, fpb.ex, fpb.bits,
&fpb.kind, 3, prec, &decpt, &se);
}
#endif