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/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD: head/lib/libarchive/archive_string_sprintf.c 189435 2009-03-06 05:14:55Z kientzle $");
/*
* The use of printf()-family functions can be troublesome
* for space-constrained applications. In addition, correctly
* implementing this function in terms of vsnprintf() requires
* two calls (one to determine the size, another to format the
* result), which in turn requires duplicating the argument list
* using va_copy, which isn't yet universally available. <sigh>
*
* So, I've implemented a bare minimum of printf()-like capability
* here. This is only used to format error messages, so doesn't
* require any floating-point support or field-width handling.
*/
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <stdio.h>
#include "archive_string.h"
#include "archive_private.h"
/*
* Utility functions to format signed/unsigned integers and append
* them to an archive_string.
*/
static void
append_uint(struct archive_string *as, uintmax_t d, unsigned base)
{
static const char *digits = "0123456789abcdef";
if (d >= base)
append_uint(as, d/base, base);
archive_strappend_char(as, digits[d % base]);
}
static void
append_int(struct archive_string *as, intmax_t d, unsigned base)
{
uintmax_t ud;
if (d < 0) {
archive_strappend_char(as, '-');
ud = (d == INTMAX_MIN) ? (uintmax_t)(INTMAX_MAX) + 1 : (uintmax_t)(-d);
} else
ud = d;
append_uint(as, ud, base);
}
void
archive_string_sprintf(struct archive_string *as, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
archive_string_vsprintf(as, fmt, ap);
va_end(ap);
}
/*
* Like 'vsprintf', but ensures the target is big enough, resizing if
* necessary.
*/
void
archive_string_vsprintf(struct archive_string *as, const char *fmt,
va_list ap)
{
char long_flag;
intmax_t s; /* Signed integer temp. */
uintmax_t u; /* Unsigned integer temp. */
const char *p, *p2;
const wchar_t *pw;
if (archive_string_ensure(as, 64) == NULL)
__archive_errx(1, "Out of memory");
if (fmt == NULL) {
as->s[0] = 0;
return;
}
for (p = fmt; *p != '\0'; p++) {
const char *saved_p = p;
if (*p != '%') {
archive_strappend_char(as, *p);
continue;
}
p++;
long_flag = '\0';
switch(*p) {
case 'j':
case 'l':
case 'z':
long_flag = *p;
p++;
break;
}
switch (*p) {
case '%':
archive_strappend_char(as, '%');
break;
case 'c':
s = va_arg(ap, int);
archive_strappend_char(as, (char)s);
break;
case 'd':
switch(long_flag) {
case 'j': s = va_arg(ap, intmax_t); break;
case 'l': s = va_arg(ap, long); break;
case 'z': s = va_arg(ap, ssize_t); break;
default: s = va_arg(ap, int); break;
}
append_int(as, s, 10);
break;
case 's':
switch(long_flag) {
case 'l':
pw = va_arg(ap, wchar_t *);
if (pw == NULL)
pw = L"(null)";
if (archive_string_append_from_wcs(as, pw,
wcslen(pw)) != 0 && errno == ENOMEM)
__archive_errx(1, "Out of memory");
break;
default:
p2 = va_arg(ap, char *);
if (p2 == NULL)
p2 = "(null)";
archive_strcat(as, p2);
break;
}
break;
case 'S':
pw = va_arg(ap, wchar_t *);
if (pw == NULL)
pw = L"(null)";
if (archive_string_append_from_wcs(as, pw,
wcslen(pw)) != 0 && errno == ENOMEM)
__archive_errx(1, "Out of memory");
break;
case 'o': case 'u': case 'x': case 'X':
/* Common handling for unsigned integer formats. */
switch(long_flag) {
case 'j': u = va_arg(ap, uintmax_t); break;
case 'l': u = va_arg(ap, unsigned long); break;
case 'z': u = va_arg(ap, size_t); break;
default: u = va_arg(ap, unsigned int); break;
}
/* Format it in the correct base. */
switch (*p) {
case 'o': append_uint(as, u, 8); break;
case 'u': append_uint(as, u, 10); break;
default: append_uint(as, u, 16); break;
}
break;
default:
/* Rewind and print the initial '%' literally. */
p = saved_p;
archive_strappend_char(as, *p);
}
}
}