99428404be
reading wide characters manually. With this change, they now use fgetwc(). To make this work, we use an internal version of fgetwc() with a few extensions: it takes an mbstate * because non-wide streams don't have a built-in mbstate, and it indicates the number of bytes read. vfscanf() now resembles vfwscanf() more closely. Minor functional improvements include working xlocale support in vfscanf(), setting the stream error indicator on encoding errors, and proper handling of shift-based encodings. (Actually, making shift-based encodings work with non-wide streams is hopeless, but the implementation now matches the broken specification.)
141 lines
4.8 KiB
C
141 lines
4.8 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Copyright (c) 2011 The FreeBSD Foundation
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* All rights reserved.
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)local.h 8.3 (Berkeley) 7/3/94
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* $FreeBSD$
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*/
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#include <sys/types.h> /* for off_t */
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#include <pthread.h>
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#include <string.h>
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#include <wchar.h>
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#include <locale.h>
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/*
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* Information local to this implementation of stdio,
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* in particular, macros and private variables.
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*/
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extern int _sread(FILE *, char *, int);
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extern int _swrite(FILE *, char const *, int);
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extern fpos_t _sseek(FILE *, fpos_t, int);
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extern int _ftello(FILE *, fpos_t *);
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extern int _fseeko(FILE *, off_t, int, int);
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extern int __fflush(FILE *fp);
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extern void __fcloseall(void);
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extern wint_t __fgetwc_mbs(FILE *, mbstate_t *, int *, locale_t);
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extern wint_t __fputwc(wchar_t, FILE *, locale_t);
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extern int __sflush(FILE *);
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extern FILE *__sfp(void);
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extern int __slbexpand(FILE *, size_t);
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extern int __srefill(FILE *);
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extern int __sread(void *, char *, int);
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extern int __swrite(void *, char const *, int);
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extern fpos_t __sseek(void *, fpos_t, int);
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extern int __sclose(void *);
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extern void __sinit(void);
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extern void _cleanup(void);
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extern void __smakebuf(FILE *);
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extern int __swhatbuf(FILE *, size_t *, int *);
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extern int _fwalk(int (*)(FILE *));
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extern int __svfscanf(FILE *, locale_t, const char *, __va_list);
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extern int __swsetup(FILE *);
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extern int __sflags(const char *, int *);
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extern int __ungetc(int, FILE *);
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extern wint_t __ungetwc(wint_t, FILE *, locale_t);
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extern int __vfprintf(FILE *, locale_t, const char *, __va_list);
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extern int __vfscanf(FILE *, const char *, __va_list);
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extern int __vfwprintf(FILE *, locale_t, const wchar_t *, __va_list);
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extern int __vfwscanf(FILE * __restrict, locale_t, const wchar_t * __restrict,
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__va_list);
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extern size_t __fread(void * __restrict buf, size_t size, size_t count,
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FILE * __restrict fp);
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extern int __sdidinit;
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static inline wint_t
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__fgetwc(FILE *fp, locale_t locale)
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{
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int nread;
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return (__fgetwc_mbs(fp, &fp->_mbstate, &nread, locale));
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}
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/*
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* Prepare the given FILE for writing, and return 0 iff it
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* can be written now. Otherwise, return EOF and set errno.
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*/
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#define prepwrite(fp) \
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((((fp)->_flags & __SWR) == 0 || \
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((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
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__swsetup(fp))
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/*
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* Test whether the given stdio file has an active ungetc buffer;
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* release such a buffer, without restoring ordinary unread data.
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*/
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#define HASUB(fp) ((fp)->_ub._base != NULL)
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#define FREEUB(fp) { \
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if ((fp)->_ub._base != (fp)->_ubuf) \
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free((char *)(fp)->_ub._base); \
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(fp)->_ub._base = NULL; \
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}
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/*
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* test for an fgetln() buffer.
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*/
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#define HASLB(fp) ((fp)->_lb._base != NULL)
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#define FREELB(fp) { \
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free((char *)(fp)->_lb._base); \
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(fp)->_lb._base = NULL; \
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}
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/*
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* Structure initializations for 'fake' FILE objects.
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*/
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#define FAKE_FILE { \
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._file = -1, \
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._fl_mutex = PTHREAD_MUTEX_INITIALIZER, \
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}
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/*
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* Set the orientation for a stream. If o > 0, the stream has wide-
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* orientation. If o < 0, the stream has byte-orientation.
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*/
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#define ORIENT(fp, o) do { \
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if ((fp)->_orientation == 0) \
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(fp)->_orientation = (o); \
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} while (0)
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