#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if !defined(HAVE_SNPRINTF) || defined(HAVE_BROKEN_SNPRINTF) || !defined(HAVE_VSNPRINTF) || defined(HAVE_BROKEN_VSNPRINTF)
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#ifdef HAVE_GCVT
#define ap_ecvt ecvt
#define ap_fcvt fcvt
#define ap_gcvt gcvt
#else
#define NDIG 80
static char *
ap_cvt(double arg, int ndigits, int *decpt, int *sign, int eflag)
{
register int r2;
double fi, fj;
register char *p, *p1;
static char buf[NDIG];
if (ndigits >= NDIG - 1)
ndigits = NDIG - 2;
r2 = 0;
*sign = 0;
p = &buf[0];
if (arg < 0) {
*sign = 1;
arg = -arg;
}
arg = modf(arg, &fi);
p1 = &buf[NDIG];
if (fi != 0) {
p1 = &buf[NDIG];
while (fi != 0) {
fj = modf(fi / 10, &fi);
*--p1 = (int) ((fj + .03) * 10) + '0';
r2++;
}
while (p1 < &buf[NDIG])
*p++ = *p1++;
} else if (arg > 0) {
while ((fj = arg * 10) < 1) {
arg = fj;
r2--;
}
}
p1 = &buf[ndigits];
if (eflag == 0)
p1 += r2;
*decpt = r2;
if (p1 < &buf[0]) {
buf[0] = '\0';
return (buf);
}
while (p <= p1 && p < &buf[NDIG]) {
arg *= 10;
arg = modf(arg, &fj);
*p++ = (int) fj + '0';
}
if (p1 >= &buf[NDIG]) {
buf[NDIG - 1] = '\0';
return (buf);
}
p = p1;
*p1 += 5;
while (*p1 > '9') {
*p1 = '0';
if (p1 > buf)
++ * --p1;
else {
*p1 = '1';
(*decpt)++;
if (eflag == 0) {
if (p > buf)
*p = '0';
p++;
}
}
}
*p = '\0';
return (buf);
}
static char *
ap_ecvt(double arg, int ndigits, int *decpt, int *sign)
{
return (ap_cvt(arg, ndigits, decpt, sign, 1));
}
static char *
ap_fcvt(double arg, int ndigits, int *decpt, int *sign)
{
return (ap_cvt(arg, ndigits, decpt, sign, 0));
}
static char *
ap_gcvt(double number, int ndigit, char *buf)
{
int sign, decpt;
register char *p1, *p2;
int i;
p1 = ap_ecvt(number, ndigit, &decpt, &sign);
p2 = buf;
if (sign)
*p2++ = '-';
for (i = ndigit - 1; i > 0 && p1[i] == '0'; i--)
ndigit--;
if ((decpt >= 0 && decpt - ndigit > 4)
|| (decpt < 0 && decpt < -3)) {
decpt--;
*p2++ = *p1++;
*p2++ = '.';
for (i = 1; i < ndigit; i++)
*p2++ = *p1++;
*p2++ = 'e';
if (decpt < 0) {
decpt = -decpt;
*p2++ = '-';
} else
*p2++ = '+';
if (decpt / 100 > 0)
*p2++ = decpt / 100 + '0';
if (decpt / 10 > 0)
*p2++ = (decpt % 100) / 10 + '0';
*p2++ = decpt % 10 + '0';
} else {
if (decpt <= 0) {
if (*p1 != '0')
*p2++ = '.';
while (decpt < 0) {
decpt++;
*p2++ = '0';
}
}
for (i = 1; i <= ndigit; i++) {
*p2++ = *p1++;
if (i == decpt)
*p2++ = '.';
}
if (ndigit < decpt) {
while (ndigit++ < decpt)
*p2++ = '0';
*p2++ = '.';
}
}
if (p2[-1] == '.')
p2--;
*p2 = '\0';
return (buf);
}
#endif
typedef enum {
NO = 0, YES = 1
} boolean_e;
#define FALSE 0
#define TRUE 1
#define NUL '\0'
#define INT_NULL ((int *)0)
#define WIDE_INT long
typedef WIDE_INT wide_int;
typedef unsigned WIDE_INT u_wide_int;
typedef int bool_int;
#define S_NULL "(null)"
#define S_NULL_LEN 6
#define FLOAT_DIGITS 6
#define EXPONENT_LENGTH 10
#define NUM_BUF_SIZE 512
struct buf_area {
char *buf_end;
char *nextb;
};
typedef struct buf_area buffy;
#define INS_CHAR( c, sp, bep, cc ) \
{ \
if ( sp < bep ) \
{ \
*sp++ = c ; \
cc++ ; \
} \
}
#define NUM( c ) ( c - '0' )
#define STR_TO_DEC( str, num ) \
num = NUM( *str++ ) ; \
while ( isdigit((int)*str ) ) \
{ \
num *= 10 ; \
num += NUM( *str++ ) ; \
}
#define FIX_PRECISION( adjust, precision, s, s_len ) \
if ( adjust ) \
while ( s_len < precision ) \
{ \
*--s = '0' ; \
s_len++ ; \
}
#define PAD( width, len, ch ) do \
{ \
INS_CHAR( ch, sp, bep, cc ) ; \
width-- ; \
} \
while ( width > len )
#define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES
static char *
conv_10(register wide_int num, register bool_int is_unsigned,
register bool_int * is_negative, char *buf_end, register int *len)
{
register char *p = buf_end;
register u_wide_int magnitude;
if (is_unsigned) {
magnitude = (u_wide_int) num;
*is_negative = FALSE;
} else {
*is_negative = (num < 0);
if (*is_negative) {
wide_int t = num + 1;
magnitude = ((u_wide_int) - t) + 1;
} else
magnitude = (u_wide_int) num;
}
do {
register u_wide_int new_magnitude = magnitude / 10;
*--p = magnitude - new_magnitude * 10 + '0';
magnitude = new_magnitude;
}
while (magnitude);
*len = buf_end - p;
return (p);
}
static char *
conv_fp(register char format, register double num,
boolean_e add_dp, int precision, bool_int * is_negative, char *buf, int *len)
{
register char *s = buf;
register char *p;
int decimal_point;
if (format == 'f')
p = ap_fcvt(num, precision, &decimal_point, is_negative);
else
p = ap_ecvt(num, precision + 1, &decimal_point, is_negative);
if (isalpha((int)*p)) {
*len = strlen(strcpy(buf, p));
*is_negative = FALSE;
return (buf);
}
if (format == 'f') {
if (decimal_point <= 0) {
*s++ = '0';
if (precision > 0) {
*s++ = '.';
while (decimal_point++ < 0)
*s++ = '0';
} else if (add_dp) {
*s++ = '.';
}
} else {
while (decimal_point-- > 0) {
*s++ = *p++;
}
if (precision > 0 || add_dp) {
*s++ = '.';
}
}
} else {
*s++ = *p++;
if (precision > 0 || add_dp)
*s++ = '.';
}
while (*p)
*s++ = *p++;
if (format != 'f') {
char temp[EXPONENT_LENGTH];
int t_len;
bool_int exponent_is_negative;
*s++ = format;
decimal_point--;
if (decimal_point != 0) {
p = conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative,
&temp[EXPONENT_LENGTH], &t_len);
*s++ = exponent_is_negative ? '-' : '+';
if (t_len == 1)
*s++ = '0';
while (t_len--)
*s++ = *p++;
} else {
*s++ = '+';
*s++ = '0';
*s++ = '0';
}
}
*len = s - buf;
return (buf);
}
static char *
conv_p2(register u_wide_int num, register int nbits,
char format, char *buf_end, register int *len)
{
register int mask = (1 << nbits) - 1;
register char *p = buf_end;
static char low_digits[] = "0123456789abcdef";
static char upper_digits[] = "0123456789ABCDEF";
register char *digits = (format == 'X') ? upper_digits : low_digits;
do {
*--p = digits[num & mask];
num >>= nbits;
}
while (num);
*len = buf_end - p;
return (p);
}
static int format_converter(register buffy * odp, const char *fmt,
va_list ap)
{
register char *sp;
register char *bep;
register int cc = 0;
register int i;
register char *s = NULL;
char *q;
int s_len;
register int min_width = 0;
int precision = 0;
enum {
LEFT, RIGHT
} adjust;
char pad_char;
char prefix_char;
double fp_num;
wide_int i_num = (wide_int) 0;
u_wide_int ui_num;
char num_buf[NUM_BUF_SIZE];
char char_buf[2];
boolean_e is_long;
boolean_e alternate_form;
boolean_e print_sign;
boolean_e print_blank;
boolean_e adjust_precision;
boolean_e adjust_width;
bool_int is_negative;
sp = odp->nextb;
bep = odp->buf_end;
while (*fmt) {
if (*fmt != '%') {
INS_CHAR(*fmt, sp, bep, cc);
} else {
adjust = RIGHT;
alternate_form = print_sign = print_blank = NO;
pad_char = ' ';
prefix_char = NUL;
fmt++;
if (isascii((int)*fmt) && !islower((int)*fmt)) {
for (;; fmt++) {
if (*fmt == '-')
adjust = LEFT;
else if (*fmt == '+')
print_sign = YES;
else if (*fmt == '#')
alternate_form = YES;
else if (*fmt == ' ')
print_blank = YES;
else if (*fmt == '0')
pad_char = '0';
else
break;
}
if (isdigit((int)*fmt)) {
STR_TO_DEC(fmt, min_width);
adjust_width = YES;
} else if (*fmt == '*') {
min_width = va_arg(ap, int);
fmt++;
adjust_width = YES;
if (min_width < 0) {
adjust = LEFT;
min_width = -min_width;
}
} else
adjust_width = NO;
if (*fmt == '.') {
adjust_precision = YES;
fmt++;
if (isdigit((int)*fmt)) {
STR_TO_DEC(fmt, precision);
} else if (*fmt == '*') {
precision = va_arg(ap, int);
fmt++;
if (precision < 0)
precision = 0;
} else
precision = 0;
} else
adjust_precision = NO;
} else
adjust_precision = adjust_width = NO;
if (*fmt == 'l') {
is_long = YES;
fmt++;
} else
is_long = NO;
switch (*fmt) {
case 'u':
if (is_long)
i_num = va_arg(ap, u_wide_int);
else
i_num = (wide_int) va_arg(ap, unsigned int);
case 'd':
case 'i':
if ((*fmt) != 'u') {
if (is_long)
i_num = va_arg(ap, wide_int);
else
i_num = (wide_int) va_arg(ap, int);
};
s = conv_10(i_num, (*fmt) == 'u', &is_negative,
&num_buf[NUM_BUF_SIZE], &s_len);
FIX_PRECISION(adjust_precision, precision, s, s_len);
if (*fmt != 'u') {
if (is_negative)
prefix_char = '-';
else if (print_sign)
prefix_char = '+';
else if (print_blank)
prefix_char = ' ';
}
break;
case 'o':
if (is_long)
ui_num = va_arg(ap, u_wide_int);
else
ui_num = (u_wide_int) va_arg(ap, unsigned int);
s = conv_p2(ui_num, 3, *fmt,
&num_buf[NUM_BUF_SIZE], &s_len);
FIX_PRECISION(adjust_precision, precision, s, s_len);
if (alternate_form && *s != '0') {
*--s = '0';
s_len++;
}
break;
case 'x':
case 'X':
if (is_long)
ui_num = (u_wide_int) va_arg(ap, u_wide_int);
else
ui_num = (u_wide_int) va_arg(ap, unsigned int);
s = conv_p2(ui_num, 4, *fmt,
&num_buf[NUM_BUF_SIZE], &s_len);
FIX_PRECISION(adjust_precision, precision, s, s_len);
if (alternate_form && i_num != 0) {
*--s = *fmt;
*--s = '0';
s_len += 2;
}
break;
case 's':
s = va_arg(ap, char *);
if (s != NULL) {
if (!adjust_precision) {
s_len = strlen(s);
}
else {
const char *walk;
for (walk = s, s_len = 0;
(s_len < precision) && (*walk != '\0');
++walk, ++s_len);
}
} else {
s = S_NULL;
s_len = S_NULL_LEN;
}
pad_char = ' ';
break;
case 'f':
case 'e':
case 'E':
fp_num = va_arg(ap, double);
s = conv_fp(*fmt, fp_num, alternate_form,
(adjust_precision == NO) ? FLOAT_DIGITS : precision,
&is_negative, &num_buf[1], &s_len);
if (is_negative)
prefix_char = '-';
else if (print_sign)
prefix_char = '+';
else if (print_blank)
prefix_char = ' ';
break;
case 'g':
case 'G':
if (adjust_precision == NO)
precision = FLOAT_DIGITS;
else if (precision == 0)
precision = 1;
s = ap_gcvt(va_arg(ap, double), precision, &num_buf[1]);
if (*s == '-')
prefix_char = *s++;
else if (print_sign)
prefix_char = '+';
else if (print_blank)
prefix_char = ' ';
s_len = strlen(s);
if (alternate_form && (q = strchr(s, '.')) == NULL)
s[s_len++] = '.';
if (*fmt == 'G' && (q = strchr(s, 'e')) != NULL)
*q = 'E';
break;
case 'c':
char_buf[0] = (char) (va_arg(ap, int));
s = &char_buf[0];
s_len = 1;
pad_char = ' ';
break;
case '%':
char_buf[0] = '%';
s = &char_buf[0];
s_len = 1;
pad_char = ' ';
break;
case 'n':
*(va_arg(ap, int *)) = cc;
break;
case 'p':
ui_num = (u_wide_int) va_arg(ap, char *);
if (sizeof(char *) <= sizeof(u_wide_int))
s = conv_p2(ui_num, 4, 'x',
&num_buf[NUM_BUF_SIZE], &s_len);
else {
s = "%p";
s_len = 2;
}
pad_char = ' ';
break;
case NUL:
continue;
default:
char_buf[0] = '%';
char_buf[1] = *fmt;
s = char_buf;
s_len = 2;
pad_char = ' ';
break;
}
if (prefix_char != NUL) {
*--s = prefix_char;
s_len++;
}
if (adjust_width && adjust == RIGHT && min_width > s_len) {
if (pad_char == '0' && prefix_char != NUL) {
INS_CHAR(*s, sp, bep, cc)
s++;
s_len--;
min_width--;
}
PAD(min_width, s_len, pad_char);
}
for (i = s_len; i != 0; i--) {
INS_CHAR(*s, sp, bep, cc);
s++;
}
if (adjust_width && adjust == LEFT && min_width > s_len)
PAD(min_width, s_len, pad_char);
}
fmt++;
}
odp->nextb = sp;
return (cc);
}
static void strx_printv(int *ccp, char *buf, size_t len, const char *format,
va_list ap)
{
buffy od;
int cc;
od.buf_end = len ? &buf[len] : (char *) ~0;
od.nextb = buf;
cc = format_converter(&od, format, ap);
if (len == 0 || od.nextb <= od.buf_end)
*(od.nextb) = '\0';
if (ccp)
*ccp = cc;
}
int ap_snprintf(char *buf, size_t len, const char *format,...)
{
int cc;
va_list ap;
va_start(ap, format);
strx_printv(&cc, buf, (len - 1), format, ap);
va_end(ap);
return (cc);
}
int ap_vsnprintf(char *buf, size_t len, const char *format, va_list ap)
{
int cc;
strx_printv(&cc, buf, (len - 1), format, ap);
return (cc);
}
#endif