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/*
* "$Id: qprintf.c 826 2010-12-29 17:29:19Z mike $"
*
* Quoted fprintf function for the ESP Package Manager (EPM).
*
* Copyright 1999-2009 by Easy Software Products.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Contents:
*
* qprintf() - Do formatted output to a file.
*/
/*
* Include necessary headers...
*/
#include <stdio.h>
#include <ctype.h>
#include "epmstring.h"
/*
* 'qprintf()' - Do formatted output to a file.
*/
int /* O - Number of bytes formatted */
qprintf(FILE *fp, /* I - File to write to */
const char *format, /* I - printf-style format string */
...) /* I - Additional args as needed... */
{
va_list ap; /* Pointer to additional arguments */
int bytes; /* Bytes written */
char sign, /* Sign of format width */
size, /* Size character (h, l, L) */
type; /* Format type character */
const char *bufformat; /* Start of format */
int width, /* Width of field */
prec; /* Number of characters of precision */
char tformat[100]; /* Temporary format string for fprintf() */
char *s; /* Pointer to string */
int slen; /* Length of string */
int i; /* Looping var */
/*
* Loop through the format string, formatting as needed...
*/
va_start(ap, format);
bytes = 0;
while (*format)
{
if (*format == '%')
{
bufformat = format;
format ++;
if (*format == '%')
{
putc(*format++, fp);
bytes ++;
continue;
}
else if (strchr(" -+#\'", *format))
sign = *format++;
else
sign = 0;
width = 0;
while (isdigit(*format & 255))
width = width * 10 + *format++ - '0';
if (*format == '.')
{
format ++;
prec = 0;
while (isdigit(*format & 255))
prec = prec * 10 + *format++ - '0';
}
else
prec = -1;
if (*format == 'l')
size = *format++;
else
size = '\0';
if (!*format)
break;
type = *format++;
switch (type)
{
case 'E' : /* Floating point formats */
case 'G' :
case 'e' :
case 'f' :
case 'g' :
if ((format - bufformat + 1) > sizeof(tformat))
break;
strlcpy(tformat, bufformat, (size_t)(format - bufformat + 1));
bytes += fprintf(fp, tformat, va_arg(ap, double));
break;
case 'B' : /* Integer formats */
case 'X' :
case 'b' :
case 'd' :
case 'i' :
case 'o' :
case 'u' :
case 'x' :
if ((format - bufformat + 1) > sizeof(tformat))
break;
strlcpy(tformat, bufformat, (size_t)(format - bufformat + 1));
if (size == 'l')
bytes += fprintf(fp, tformat, va_arg(ap, long));
else
bytes += fprintf(fp, tformat, va_arg(ap, int));
break;
case 'p' : /* Pointer value */
if ((format - bufformat + 1) > sizeof(tformat))
break;
strlcpy(tformat, bufformat, (size_t)(format - bufformat + 1));
bytes += fprintf(fp, tformat, va_arg(ap, void *));
break;
case 'c' : /* Character or character array */
if (width <= 1)
{
bytes ++;
putc(va_arg(ap, int), fp);
}
else
{
fwrite(va_arg(ap, char *), 1, (size_t)width, fp);
bytes += width;
}
break;
case 's' : /* String */
if ((s = va_arg(ap, char *)) == NULL)
s = "(null)";
slen = strlen(s);
if (slen > width && prec != width)
width = slen;
if (slen > width)
slen = width;
if (sign != '-')
{
for (i = width - slen; i > 0; i --, bytes ++)
putc(' ', fp);
}
for (i = slen; i > 0; i --, s ++, bytes ++)
{
if (strchr("`~#$%^&*()[{]}\\|;\'\"<>? ", *s))
{
putc('\\', fp);
bytes ++;
}
putc(*s, fp);
}
if (sign == '-')
{
for (i = width - slen; i > 0; i --, bytes ++)
putc(' ', fp);
}
break;
}
}
else
{
putc(*format++, fp);
bytes ++;
}
}
va_end(ap);
/*
* Return the number of characters written.
*/
return (bytes);
}
/*
* End of "$Id: qprintf.c 826 2010-12-29 17:29:19Z mike $".
*/
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