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#include <monetary.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
ssize_t strfmon(char * restrict s, size_t maxsize, const char * restrict format, ...)
{
size_t i = 0;
va_list ap;
va_start(ap, format);
while (*format && i < maxsize) {
if (*format != '%') {
s[i++] = *format++;
continue;
}
format++;
if (*format == '%') {
s[i++] = '%';
format++;
continue;
}
char fill = ' ';
char style = '+';
int grouping = 1;
int symbol = 1;
enum { left, right } align = right;
switch (*format) {
case '=':
fill = format[1];
format += 2;
break;
case '^':
grouping = 0;
format++;
break;
case '+':
case '(':
style = *format;
format++;
break;
case '!':
symbol = 0;
format++;
break;
case '-':
align = left;
format++;
break;
}
unsigned long width = 0;
if (isdigit(*format)) {
char *end = NULL;
width = strtoul(format, &end, 10);
format = end + 1;
}
if (*format == '#') {
/* TODO: left precision */
}
if (*format == '.') {
/* TODO: right precision */
}
if (*format == 'i') {
/* international format */
double value = va_arg(ap, double);
i += snprintf(s + i, maxsize - i, "USD %.2g", value);
format++;
continue;
}
if (*format == 'n') {
/* national format */
double value = va_arg(ap, double);
i += snprintf(s + i, maxsize - i, "$%.2g", value);
format++;
continue;
}
va_end(ap);
return -1;
}
va_end(ap);
return i;
}
/*
XOPEN(4)
POSIX(200809)
*/
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