[apple/libc.git] / stdio / FreeBSD / fgetws.c

/*-
 * Copyright (c) 2002-2004 Tim J. Robbins.
 * 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 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 AUTHOR 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.8 2009/11/25 04:45:45 wollman Exp $");

#include "xlocale_private.h"

#include "namespace.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
#include "mblocal.h"

wchar_t *
fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t loc)
{
	wchar_t *wsp;
	size_t nconv;
	const char *src;
	unsigned char *nl;
	struct __xlocale_st_runelocale *rl;
	size_t (*__mbsnrtowcs)(wchar_t * __restrict, const char ** __restrict, size_t, size_t, __darwin_mbstate_t * __restrict, locale_t);

	NORMALIZE_LOCALE(loc);
	rl = loc->__lc_ctype;
	__mbsnrtowcs = rl->__mbsnrtowcs;
	FLOCKFILE(fp);
	ORIENT(fp, 1);

	if (n <= 0) {
		errno = EINVAL;
		goto error;
	}

	if (fp->_r <= 0 && __srefill(fp))
		/* EOF */
		goto error;
	wsp = ws;
	do {
		src = (const char *)fp->_p;
		nl = memchr(fp->_p, '\n', fp->_r);
		nconv = __mbsnrtowcs(wsp, &src,
		    nl != NULL ? (nl - fp->_p + 1) : fp->_r,
		    n - 1, &fp->_mbstate, loc);
		if (nconv == (size_t)-1)
			/* Conversion error */
			goto error;
		if (src == NULL) {
			/*
			 * We hit a null byte. Increment the character count,
			 * since mbsnrtowcs()'s return value doesn't include
			 * the terminating null, then resume conversion
			 * after the null.
			 */
			nconv++;
			src = memchr(fp->_p, '\0', fp->_r);
			src++;
		}
		fp->_r -= (unsigned char *)src - fp->_p;
		fp->_p = (unsigned char *)src;
		n -= nconv;
		wsp += nconv;
	} while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 ||
	    __srefill(fp) == 0));
	if (wsp == ws)
		/* EOF */
		goto error;
	if (!rl->__mbsinit(&fp->_mbstate, loc))
		/* Incomplete character */
		goto error;
	*wsp = L'\0';
	FUNLOCKFILE(fp);

	return (ws);

error:
	FUNLOCKFILE(fp);
	return (NULL);
}

wchar_t *
fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
{
	return fgetws_l(ws, n, fp, __current_locale());
}
Commit	Line	Data
5b2abdfb	1	/*-
3d9156a7	2	* Copyright (c) 2002-2004 Tim J. Robbins.
5b2abdfb A	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	15	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	16	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	17	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	18	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	19	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	20	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	21	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	22	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	23	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	24	* SUCH DAMAGE.
5b2abdfb	25	*/
5b2abdfb	26
9385eb3d	27	#include <sys/cdefs.h>
1f2f436a	28	__FBSDID("$FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.8 2009/11/25 04:45:45 wollman Exp $");
9385eb3d	29
ad3c9f2a A	30	#include "xlocale_private.h"
ad3c9f2a A	31
9385eb3d A	32	#include "namespace.h"
	33	#include <errno.h>
	34	#include <stdio.h>
3d9156a7	35	#include <string.h>
9385eb3d A	36	#include <wchar.h>
	37	#include "un-namespace.h"
	38	#include "libc_private.h"
	39	#include "local.h"
3d9156a7	40	#include "mblocal.h"
9385eb3d A	41
9385eb3d A	42	wchar_t *
ad3c9f2a	43	fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t loc)
5b2abdfb	44	{
9385eb3d	45	wchar_t *wsp;
3d9156a7 A	46	size_t nconv;
	47	const char *src;
	48	unsigned char *nl;
ad3c9f2a A	49	struct __xlocale_st_runelocale *rl;
ad3c9f2a A	50	size_t (__mbsnrtowcs)(wchar_t __restrict, const char ** __restrict, size_t, size_t, __darwin_mbstate_t * __restrict, locale_t);
9385eb3d	51
ad3c9f2a A	52	NORMALIZE_LOCALE(loc);
	53	rl = loc->__lc_ctype;
	54	__mbsnrtowcs = rl->__mbsnrtowcs;
9385eb3d A	55	FLOCKFILE(fp);
	56	ORIENT(fp, 1);
	57
	58	if (n <= 0) {
	59	errno = EINVAL;
	60	goto error;
	61	}
	62
3d9156a7 A	63	if (fp->_r <= 0 && __srefill(fp))
	64	/* EOF */
	65	goto error;
9385eb3d	66	wsp = ws;
3d9156a7	67	do {
ad3c9f2a	68	src = (const char *)fp->_p;
3d9156a7 A	69	nl = memchr(fp->_p, '\n', fp->_r);
	70	nconv = __mbsnrtowcs(wsp, &src,
	71	nl != NULL ? (nl - fp->_p + 1) : fp->_r,
ad3c9f2a	72	n - 1, &fp->_mbstate, loc);
3d9156a7 A	73	if (nconv == (size_t)-1)
3d9156a7 A	74	/* Conversion error */
9385eb3d	75	goto error;
3d9156a7 A	76	if (src == NULL) {
	77	/*
	78	* We hit a null byte. Increment the character count,
	79	* since mbsnrtowcs()'s return value doesn't include
	80	* the terminating null, then resume conversion
	81	* after the null.
	82	*/
	83	nconv++;
	84	src = memchr(fp->_p, '\0', fp->_r);
	85	src++;
9385eb3d	86	}
3d9156a7 A	87	fp->_r -= (unsigned char *)src - fp->_p;
	88	fp->_p = (unsigned char *)src;
	89	n -= nconv;
	90	wsp += nconv;
	91	} while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 \|\|
	92	__srefill(fp) == 0));
	93	if (wsp == ws)
	94	/* EOF */
	95	goto error;
ad3c9f2a	96	if (!rl->__mbsinit(&fp->_mbstate, loc))
3d9156a7 A	97	/* Incomplete character */
3d9156a7 A	98	goto error;
1f2f436a	99	*wsp = L'\0';
9385eb3d A	100	FUNLOCKFILE(fp);
	101
	102	return (ws);
5b2abdfb	103
9385eb3d A	104	error:
	105	FUNLOCKFILE(fp);
	106	return (NULL);
5b2abdfb	107	}
ad3c9f2a A	108
	109	wchar_t *
	110	fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
	111	{
	112	return fgetws_l(ws, n, fp, __current_locale());
	113	}