/*
* "$Id$"
*
* String functions for Mini-XML, a small XML-like file parsing library.
*
* Copyright 2003-2005 by Michael Sweet.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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:
*
* mxml_strdup() - Duplicate a string.
* mxml_strdupf() - Format and duplicate a string.
* mxml_vsnprintf() - Format a string into a fixed size buffer.
*/
/*
* Include necessary headers...
*/
#include "config.h"
/*
* 'mxml_strdup()' - Duplicate a string.
*/
#ifndef HAVE_STRDUP
char * /* O - New string pointer */
mxml_strdup(const char *s) /* I - String to duplicate */
{
char *t; /* New string pointer */
if (s == NULL)
return (NULL);
if ((t = malloc(strlen(s) + 1)) == NULL)
return (NULL);
return (strcpy(t, s));
}
#endif /* !HAVE_STRDUP */
/*
* 'mxml_strdupf()' - Format and duplicate a string.
*/
char * /* O - New string pointer */
mxml_strdupf(const char *format, /* I - Printf-style format string */
va_list ap) /* I - Pointer to additional arguments */
{
int bytes; /* Number of bytes required */
char *buffer, /* String buffer */
temp[256]; /* Small buffer for first vsnprintf */
/*
* First format with a tiny buffer; this will tell us how many bytes are
* needed...
*/
bytes = vsnprintf(temp, sizeof(temp), format, ap);
if (bytes < sizeof(temp))
{
/*
* Hey, the formatted string fits in the tiny buffer, so just dup that...
*/
return (strdup(temp));
}
/*
* Allocate memory for the whole thing and reformat to the new, larger
* buffer...
*/
if ((buffer = calloc(1, bytes + 1)) != NULL)
vsnprintf(buffer, bytes + 1, format, ap);
/*
* Return the new string...
*/
return (buffer);
}
#ifndef HAVE_VSNPRINTF
/*
* 'mxml_vsnprintf()' - Format a string into a fixed size buffer.
*/
int /* O - Number of bytes formatted */
mxml_vsnprintf(char *buffer, /* O - Output buffer */
size_t bufsize, /* O - Size of output buffer */
const char *format, /* I - Printf-style format string */
va_list ap) /* I - Pointer to additional arguments */
{
char *bufptr, /* Pointer to position in buffer */
*bufend, /* Pointer to end of buffer */
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 sprintf() */
temp[1024]; /* Buffer for formatted numbers */
char *s; /* Pointer to string */
int slen; /* Length of string */
int bytes; /* Total number of bytes needed */
/*
* Loop through the format string, formatting as needed...
*/
bufptr = buffer;
bufend = buffer + bufsize - 1;
bytes = 0;
while (*format)
{
if (*format == '%')
{
bufformat = format;
format ++;
if (*format == '%')
{
*bufptr++ = *format++;
continue;
}
else if (strchr(" -+#\'", *format))
sign = *format++;
else
sign = 0;
width = 0;
while (isdigit(*format))
width = width * 10 + *format++ - '0';
if (*format == '.')
{
format ++;
prec = 0;
while (isdigit(*format))
prec = prec * 10 + *format++ - '0';
}
else
prec = -1;
if (*format == 'l' && format[1] == 'l')
{
size = 'L';
format += 2;
}
else if (*format == 'h' || *format == 'l' || *format == 'L')
size = *format++;
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) ||
(width + 2) > sizeof(temp))
break;
strncpy(tformat, bufformat, format - bufformat);
tformat[format - bufformat] = '\0';
sprintf(temp, tformat, va_arg(ap, double));
bytes += strlen(temp);
if (bufptr)
{
if ((bufptr + strlen(temp)) > bufend)
{
strncpy(bufptr, temp, bufend - bufptr);
bufptr = bufend;
break;
}
else
{
strcpy(bufptr, temp);
bufptr += strlen(temp);
}
}
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) ||
(width + 2) > sizeof(temp))
break;
strncpy(tformat, bufformat, format - bufformat);
tformat[format - bufformat] = '\0';
sprintf(temp, tformat, va_arg(ap, int));
bytes += strlen(temp);
if (bufptr)
{
if ((bufptr + strlen(temp)) > bufend)
{
strncpy(bufptr, temp, bufend - bufptr);
bufptr = bufend;
break;
}
else
{
strcpy(bufptr, temp);
bufptr += strlen(temp);
}
}
break;
case 'p' : /* Pointer value */
if ((format - bufformat + 1) > sizeof(tformat) ||
(width + 2) > sizeof(temp))
break;
strncpy(tformat, bufformat, format - bufformat);
tformat[format - bufformat] = '\0';
sprintf(temp, tformat, va_arg(ap, void *));
bytes += strlen(temp);
if (bufptr)
{
if ((bufptr + strlen(temp)) > bufend)
{
strncpy(bufptr, temp, bufend - bufptr);
bufptr = bufend;
break;
}
else
{
strcpy(bufptr, temp);
bufptr += strlen(temp);
}
}
break;
case 'c' : /* Character or character array */
bytes += width;
if (bufptr)
{
if (width <= 1)
*bufptr++ = va_arg(ap, int);
else
{
if ((bufptr + width) > bufend)
width = bufend - bufptr;
memcpy(bufptr, va_arg(ap, char *), width);
bufptr += width;
}
}
break;
case 's' : /* String */
if ((s = va_arg(ap, char *)) == NULL)
s = "(null)";
slen = strlen(s);
if (slen > width && prec != width)
width = slen;
bytes += width;
if (bufptr)
{
if ((bufptr + width) > bufend)
width = bufend - bufptr;
if (slen > width)
slen = width;
if (sign == '-')
{
strncpy(bufptr, s, slen);
memset(bufptr + slen, ' ', width - slen);
}
else
{
memset(bufptr, ' ', width - slen);
strncpy(bufptr + width - slen, s, slen);
}
bufptr += width;
}
break;
case 'n' : /* Output number of chars so far */
if ((format - bufformat + 1) > sizeof(tformat) ||
(width + 2) > sizeof(temp))
break;
strncpy(tformat, bufformat, format - bufformat);
tformat[format - bufformat] = '\0';
sprintf(temp, tformat, va_arg(ap, int));
bytes += strlen(temp);
if (bufptr)
{
if ((bufptr + strlen(temp)) > bufend)
{
strncpy(bufptr, temp, bufend - bufptr);
bufptr = bufend;
break;
}
else
{
strcpy(bufptr, temp);
bufptr += strlen(temp);
}
}
break;
}
}
else
{
bytes ++;
if (bufptr && bufptr < bufend)
*bufptr++ = *format++;
}
}
/*
* Nul-terminate the string and return the number of characters needed.
*/
*bufptr = '\0';
return (bytes);
}
#endif /* !HAVE_VSNPRINTF */
/*
* End of "$Id$".
*/