freebsd-dev/lib/libc/stdio/xprintf_str.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

190 lines
5.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2005 Poul-Henning Kamp
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include <namespace.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include <assert.h>
#include <wchar.h>
#include "printf.h"
/*
* Convert a wide character string argument for the %ls format to a multibyte
* string representation. If not -1, prec specifies the maximum number of
* bytes to output, and also means that we can't assume that the wide char.
* string ends is null-terminated.
*/
static char *
__wcsconv(wchar_t *wcsarg, int prec)
{
static const mbstate_t initial;
mbstate_t mbs;
char buf[MB_LEN_MAX];
wchar_t *p;
char *convbuf;
size_t clen, nbytes;
/* Allocate space for the maximum number of bytes we could output. */
if (prec < 0) {
p = wcsarg;
mbs = initial;
nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
if (nbytes == (size_t)-1)
return (NULL);
} else {
/*
* Optimisation: if the output precision is small enough,
* just allocate enough memory for the maximum instead of
* scanning the string.
*/
if (prec < 128)
nbytes = prec;
else {
nbytes = 0;
p = wcsarg;
mbs = initial;
for (;;) {
clen = wcrtomb(buf, *p++, &mbs);
if (clen == 0 || clen == (size_t)-1 ||
(int)(nbytes + clen) > prec)
break;
nbytes += clen;
}
}
}
if ((convbuf = malloc(nbytes + 1)) == NULL)
return (NULL);
/* Fill the output buffer. */
p = wcsarg;
mbs = initial;
if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
nbytes, &mbs)) == (size_t)-1) {
free(convbuf);
return (NULL);
}
convbuf[nbytes] = '\0';
return (convbuf);
}
/* 's' ---------------------------------------------------------------*/
int
__printf_arginfo_str(const struct printf_info *pi, size_t n, int *argt)
{
assert (n > 0);
if (pi->is_long || pi->spec == 'C')
argt[0] = PA_WSTRING;
else
argt[0] = PA_STRING;
return (1);
}
int
__printf_render_str(struct __printf_io *io, const struct printf_info *pi, const void *const *arg)
{
const char *p;
wchar_t *wcp;
char *convbuf;
int l;
if (pi->is_long || pi->spec == 'S') {
wcp = *((wint_t **)arg[0]);
if (wcp == NULL)
return (__printf_out(io, pi, "(null)", 6));
convbuf = __wcsconv(wcp, pi->prec);
if (convbuf == NULL)
return (-1);
l = __printf_out(io, pi, convbuf, strlen(convbuf));
free(convbuf);
return (l);
}
p = *((char **)arg[0]);
if (p == NULL)
return (__printf_out(io, pi, "(null)", 6));
l = strlen(p);
if (pi->prec >= 0 && pi->prec < l)
l = pi->prec;
return (__printf_out(io, pi, p, l));
}
/* 'c' ---------------------------------------------------------------*/
int
__printf_arginfo_chr(const struct printf_info *pi, size_t n, int *argt)
{
assert (n > 0);
if (pi->is_long || pi->spec == 'C')
argt[0] = PA_WCHAR;
else
argt[0] = PA_INT;
return (1);
}
int
__printf_render_chr(struct __printf_io *io, const struct printf_info *pi, const void *const *arg)
{
int i;
wint_t ii;
unsigned char c;
static const mbstate_t initial; /* XXX: this is bogus! */
mbstate_t mbs;
size_t mbseqlen;
char buf[MB_CUR_MAX];
if (pi->is_long || pi->spec == 'C') {
ii = *((wint_t *)arg[0]);
mbs = initial;
mbseqlen = wcrtomb(buf, (wchar_t)ii, &mbs);
if (mbseqlen == (size_t) -1)
return (-1);
return (__printf_out(io, pi, buf, mbseqlen));
}
i = *((int *)arg[0]);
c = i;
i = __printf_out(io, pi, &c, 1);
__printf_flush(io);
return (i);
}