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#include <stdio.h>
#include <ctype.h>
#include <stdarg.h>
#include <monetary.h>
#include <errno.h>
ssize_t strfmon(char *s, size_t n, const char *fmt, ...)
{
size_t l;
double x;
int fill, nogrp, negpar, nosym, left, intl;
int lp, rp, w, fw;
char *s0=s;
va_list ap;
va_start(ap, fmt);
for (; n && *fmt; ) {
if (*fmt != '%') {
literal:
*s++ = *fmt++;
n--;
continue;
}
fmt++;
if (*fmt == '%') goto literal;
fill = ' ';
nogrp = 0;
negpar = 0;
nosym = 0;
left = 0;
for (; ; fmt++) {
switch (*fmt) {
case '=':
fill = *++fmt;
continue;
case '^':
nogrp = 1;
continue;
case '(':
negpar = 1;
case '+':
continue;
case '!':
nosym = 1;
continue;
case '-':
left = 1;
continue;
}
break;
}
for (fw=0; isdigit(*fmt); fmt++)
fw = 10*fw + (*fmt-'0');
lp = 0;
rp = 2;
if (*fmt=='#') for (lp=0, fmt++; isdigit(*fmt); fmt++)
lp = 10*lp + (*fmt-'0');
if (*fmt=='.') for (rp=0, fmt++; isdigit(*fmt); fmt++)
rp = 10*rp + (*fmt-'0');
intl = *fmt++ == 'i';
w = lp + 1 + rp;
if (!left && fw>w) w = fw;
x = va_arg(ap, double);
l = snprintf(s, n, "%*.*f", w, rp, x);
if (l >= n) {
errno = E2BIG;
return -1;
}
s += l;
n -= l;
}
return s-s0;
}
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