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Signed-off-by: darylm503 Reviewed-by: geekboy15a git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12653 6f19259b-4bc3-4df7-8a09-765794883524
1141 lines
31 KiB
C
1141 lines
31 KiB
C
/** @file
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Implementation of scanf internals for <stdio.h>.
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Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License that accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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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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This code is derived from software contributed to Berkeley by
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Chris Torek.
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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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- 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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- 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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- 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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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND 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 COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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NetBSD: vfscanf.c,v 1.37.4.1 2007/05/07 19:49:08 pavel Exp
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FreeBSD: src/lib/libc/stdio/vfscanf.c,v 1.41 2007/01/09 00:28:07 imp Exp
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vfscanf.c 8.1 (Berkeley) 6/4/93
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**/
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#include <LibConfig.h>
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#include "namespace.h"
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <sys/types.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "reentrant.h"
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#include "local.h"
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#ifndef NO_FLOATING_POINT
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#include <locale.h>
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#endif
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/*
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* Provide an external name for vfscanf. Note, EFI uses the normal
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* namespace.h method; stdio routines explicitly use the internal name
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* __svfscanf.
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*/
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#ifdef __weak_alias
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__weak_alias(vfscanf,__svfscanf)
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#endif
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#define BUF 513 /* Maximum length of numeric string. */
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/*
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* Flags used during conversion.
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*/
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#define LONG 0x0001 /* l: long or double */
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#define LONGDBL 0x0002 /* L: long double */
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#define SHORT 0x0004 /* h: short */
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#define SUPPRESS 0x0008 /* *: suppress assignment */
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#define POINTER 0x0010 /* p: void * (as hex) */
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#define NOSKIP 0x0020 /* [ or c: do not skip blanks */
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#define LONGLONG 0x0400 /* ll: long long (+ deprecated q: quad) */
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#define INTMAXT 0x0800 /* j: intmax_t */
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#define PTRDIFFT 0x1000 /* t: ptrdiff_t */
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#define SIZET 0x2000 /* z: size_t */
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#define SHORTSHORT 0x4000 /* hh: char */
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#define UNSIGNED 0x8000 /* %[oupxX] conversions */
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/*
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* The following are used in integral conversions only:
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* SIGNOK, NDIGITS, PFXOK, and NZDIGITS
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*/
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#define SIGNOK 0x00040 /* +/- is (still) legal */
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#define NDIGITS 0x00080 /* no digits detected */
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#define PFXOK 0x00100 /* 0x prefix is (still) legal */
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#define NZDIGITS 0x00200 /* no zero digits detected */
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#define HAVESIGN 0x10000 /* sign detected */
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/*
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* Conversion types.
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*/
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#define CT_CHAR 0 /* %c conversion */
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#define CT_CCL 1 /* %[...] conversion */
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#define CT_STRING 2 /* %s conversion */
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#define CT_INT 3 /* %[dioupxX] conversion */
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#define CT_FLOAT 4 /* %[efgEFG] conversion */
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static const u_char *__sccl(char *, const u_char *);
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#ifndef NO_FLOATING_POINT
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static int parsefloat(FILE *, char *, char *);
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#endif
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int __scanfdebug = 0;
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#define __collate_load_error /*CONSTCOND*/0
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static int
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__collate_range_cmp(int c1, int c2)
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{
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static char s1[2], s2[2];
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s1[0] = (char)c1;
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s2[0] = (char)c2;
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return strcoll(s1, s2);
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}
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/*
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* __svfscanf - MT-safe version
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*/
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int
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__svfscanf(FILE *fp, char const *fmt0, va_list ap)
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{
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int ret;
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if(fp == NULL) {
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errno = EINVAL;
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return (EOF);
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}
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FLOCKFILE(fp);
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ret = __svfscanf_unlocked(fp, fmt0, ap);
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FUNLOCKFILE(fp);
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return (ret);
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}
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/*
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* __svfscanf_unlocked - non-MT-safe version of __svfscanf
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*/
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int
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__svfscanf_unlocked(FILE *fp, const char *fmt0, va_list ap)
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{
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const u_char *fmt = (const u_char *)fmt0;
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int c; /* character from format, or conversion */
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size_t width; /* field width, or 0 */
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char *p; /* points into all kinds of strings */
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size_t n; /* handy size_t */
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int flags; /* flags as defined above */
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char *p0; /* saves original value of p when necessary */
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int nassigned; /* number of fields assigned */
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int nconversions; /* number of conversions */
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int nread; /* number of characters consumed from fp */
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int base; /* base argument to conversion function */
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char ccltab[256]; /* character class table for %[...] */
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char buf[BUF]; /* buffer for numeric and mb conversions */
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wchar_t *wcp; /* handy wide character pointer */
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size_t nconv; /* length of multibyte sequence converted */
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static const mbstate_t initial = { 0 };
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mbstate_t mbs;
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/* `basefix' is used to avoid `if' tests in the integer scanner */
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static const short basefix[17] =
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{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
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_DIAGASSERT(fp != NULL);
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_DIAGASSERT(fmt0 != NULL);
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if(fp == NULL) {
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errno = EINVAL;
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return (EOF);
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}
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_SET_ORIENTATION(fp, -1);
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//Print(L"%a( %d, \"%a\", ...)\n", __func__, fp->_file, fmt0);
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nassigned = 0;
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nconversions = 0;
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nread = 0;
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base = 0;
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for (;;) {
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c = (unsigned char)*fmt++;
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if (c == 0)
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return (nassigned);
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if (isspace(c)) {
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while ((fp->_r > 0 || __srefill(fp) == 0) &&
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isspace(*fp->_p))
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nread++, fp->_r--, fp->_p++;
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continue;
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}
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//Print(L"%a: %d\n", __func__, __LINE__);
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if (c != '%')
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goto literal;
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width = 0;
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flags = 0;
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/*
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* switch on the format. continue if done;
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* break once format type is derived.
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*/
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again: c = *fmt++;
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//Print(L"%a: %d\n", __func__, __LINE__);
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switch (c) {
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case '%':
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literal:
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//Print(L"%a: %d\n", __func__, __LINE__);
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if (fp->_r <= 0 && __srefill(fp))
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goto input_failure;
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if (*fp->_p != c)
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goto match_failure;
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fp->_r--, fp->_p++;
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nread++;
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continue;
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case '*':
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flags |= SUPPRESS;
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goto again;
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case 'j':
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flags |= INTMAXT;
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goto again;
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case 'l':
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if (flags & LONG) {
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flags &= ~LONG;
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flags |= LONGLONG;
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} else
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flags |= LONG;
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goto again;
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case 'q':
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flags |= LONGLONG; /* not quite */
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goto again;
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case 't':
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flags |= PTRDIFFT;
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goto again;
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case 'z':
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flags |= SIZET;
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goto again;
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case 'L':
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flags |= LONGDBL;
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goto again;
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case 'h':
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if (flags & SHORT) {
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flags &= ~SHORT;
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flags |= SHORTSHORT;
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} else
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flags |= SHORT;
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goto again;
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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width = width * 10 + c - '0';
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goto again;
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/*
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* Conversions.
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*/
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case 'd':
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c = CT_INT;
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base = 10;
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break;
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case 'i':
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c = CT_INT;
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base = 0;
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break;
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case 'o':
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c = CT_INT;
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flags |= UNSIGNED;
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base = 8;
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break;
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case 'u':
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c = CT_INT;
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flags |= UNSIGNED;
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base = 10;
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break;
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case 'X':
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case 'x':
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flags |= PFXOK; /* enable 0x prefixing */
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c = CT_INT;
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flags |= UNSIGNED;
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base = 16;
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break;
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#ifndef NO_FLOATING_POINT
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case 'A': case 'E': case 'F': case 'G':
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case 'a': case 'e': case 'f': case 'g':
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c = CT_FLOAT;
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break;
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#endif
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case 'S':
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flags |= LONG;
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/* FALLTHROUGH */
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case 's':
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c = CT_STRING;
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break;
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case '[':
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fmt = __sccl(ccltab, fmt);
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flags |= NOSKIP;
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c = CT_CCL;
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break;
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case 'C':
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flags |= LONG;
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/* FALLTHROUGH */
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case 'c':
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flags |= NOSKIP;
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c = CT_CHAR;
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break;
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case 'p': /* pointer format is like hex */
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flags |= POINTER | PFXOK;
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c = CT_INT; /* assumes sizeof(uintmax_t) */
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flags |= UNSIGNED; /* >= sizeof(uintptr_t) */
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base = 16;
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break;
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|
|
case 'n':
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nconversions++;
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if (flags & SUPPRESS) /* ??? */
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continue;
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if (flags & SHORTSHORT)
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*va_arg(ap, char *) = (char)nread;
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else if (flags & SHORT)
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*va_arg(ap, short *) = (short)nread;
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else if (flags & LONG)
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*va_arg(ap, long *) = nread;
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else if (flags & LONGLONG)
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*va_arg(ap, long long *) = nread;
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else if (flags & INTMAXT)
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*va_arg(ap, intmax_t *) = nread;
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else if (flags & SIZET)
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*va_arg(ap, size_t *) = nread;
|
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else if (flags & PTRDIFFT)
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*va_arg(ap, ptrdiff_t *) = nread;
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else
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*va_arg(ap, int *) = nread;
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continue;
|
|
|
|
default:
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goto match_failure;
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|
|
/*
|
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* Disgusting backwards compatibility hack. XXX
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*/
|
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case '\0': /* compat */
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return (EOF);
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}
|
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//Print(L"%a: %d\n", __func__, __LINE__);
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|
|
|
/*
|
|
* We have a conversion that requires input.
|
|
*/
|
|
if (fp->_r <= 0 && __srefill(fp))
|
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{
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
goto input_failure;
|
|
}
|
|
|
|
/*
|
|
* Consume leading white space, except for formats
|
|
* that suppress this.
|
|
*/
|
|
if ((flags & NOSKIP) == 0) {
|
|
while (isspace(*fp->_p)) {
|
|
nread++;
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else if (__srefill(fp))
|
|
{
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
goto input_failure;
|
|
}
|
|
}
|
|
/*
|
|
* Note that there is at least one character in
|
|
* the buffer, so conversions that do not set NOSKIP
|
|
* ca no longer result in an input failure.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Do the conversion.
|
|
*/
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
switch (c) {
|
|
|
|
case CT_CHAR:
|
|
/* scan arbitrary characters (sets NOSKIP) */
|
|
if (width == 0)
|
|
width = 1;
|
|
if (flags & LONG) {
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = va_arg(ap, wchar_t *);
|
|
else
|
|
wcp = NULL;
|
|
n = 0;
|
|
while (width != 0) {
|
|
if (n == MB_CUR_MAX) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
buf[n++] = *fp->_p;
|
|
fp->_p++;
|
|
fp->_r--;
|
|
mbs = initial;
|
|
nconv = mbrtowc(wcp, buf, n, &mbs);
|
|
if (nconv == (size_t)-1) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
if (nconv == 0 && !(flags & SUPPRESS))
|
|
*wcp = L'\0';
|
|
if (nconv != (size_t)-2) {
|
|
nread += (int)n;
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
wcp++;
|
|
n = 0;
|
|
}
|
|
if (fp->_r <= 0 && __srefill(fp)) {
|
|
if (n != 0) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!(flags & SUPPRESS))
|
|
nassigned++;
|
|
} else if (flags & SUPPRESS) {
|
|
size_t sum = 0;
|
|
for (;;) {
|
|
if ((n = fp->_r) < width) {
|
|
sum += n;
|
|
width -= n;
|
|
fp->_p += n;
|
|
if (__srefill(fp)) {
|
|
if (sum == 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
} else {
|
|
sum += width;
|
|
fp->_r -= (int)width;
|
|
fp->_p += width;
|
|
break;
|
|
}
|
|
}
|
|
nread += (int)sum;
|
|
} else {
|
|
size_t r = fread(va_arg(ap, char *), 1,
|
|
width, fp);
|
|
|
|
if (r == 0)
|
|
goto input_failure;
|
|
nread += (int)r;
|
|
nassigned++;
|
|
}
|
|
nconversions++;
|
|
break;
|
|
|
|
case CT_CCL:
|
|
/* scan a (nonempty) character class (sets NOSKIP) */
|
|
if (width == 0)
|
|
width = (size_t)~0; /* `infinity' */
|
|
/* take only those things in the class */
|
|
if (flags & LONG) {
|
|
wchar_t twc;
|
|
int nchars;
|
|
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = va_arg(ap, wchar_t *);
|
|
else
|
|
wcp = &twc;
|
|
n = 0;
|
|
nchars = 0;
|
|
while (width != 0) {
|
|
if (n == MB_CUR_MAX) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
buf[n++] = *fp->_p;
|
|
fp->_p++;
|
|
fp->_r--;
|
|
mbs = initial;
|
|
nconv = mbrtowc(wcp, buf, n, &mbs);
|
|
if (nconv == (size_t)-1) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
if (nconv == 0)
|
|
*wcp = L'\0';
|
|
if (nconv != (size_t)-2) {
|
|
if (wctob(*wcp) != EOF &&
|
|
!ccltab[wctob(*wcp)]) {
|
|
while (n != 0) {
|
|
n--;
|
|
(void)ungetc(buf[n],
|
|
fp);
|
|
}
|
|
break;
|
|
}
|
|
nread += (int)n;
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
wcp++;
|
|
nchars++;
|
|
n = 0;
|
|
}
|
|
if (fp->_r <= 0 && __srefill(fp)) {
|
|
if (n != 0) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (n != 0) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
n = nchars;
|
|
if (n == 0)
|
|
goto match_failure;
|
|
if (!(flags & SUPPRESS)) {
|
|
*wcp = L'\0';
|
|
nassigned++;
|
|
}
|
|
} else if (flags & SUPPRESS) {
|
|
n = 0;
|
|
while (ccltab[*fp->_p]) {
|
|
n++, fp->_r--, fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (fp->_r <= 0 && __srefill(fp)) {
|
|
if (n == 0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
if (n == 0)
|
|
goto match_failure;
|
|
} else {
|
|
p0 = p = va_arg(ap, char *);
|
|
while (ccltab[*fp->_p]) {
|
|
fp->_r--;
|
|
*p++ = *fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (fp->_r <= 0 && __srefill(fp)) {
|
|
if (p == p0)
|
|
goto input_failure;
|
|
break;
|
|
}
|
|
}
|
|
n = p - p0;
|
|
if (n == 0)
|
|
goto match_failure;
|
|
*p = 0;
|
|
nassigned++;
|
|
}
|
|
nread += (int)n;
|
|
nconversions++;
|
|
break;
|
|
|
|
case CT_STRING:
|
|
/* like CCL, but zero-length string OK, & no NOSKIP */
|
|
if (width == 0)
|
|
width = (size_t)~0;
|
|
if (flags & LONG) {
|
|
wchar_t twc;
|
|
|
|
if ((flags & SUPPRESS) == 0)
|
|
wcp = va_arg(ap, wchar_t *);
|
|
else
|
|
wcp = &twc;
|
|
n = 0;
|
|
while (!isspace(*fp->_p) && width != 0) {
|
|
if (n == MB_CUR_MAX) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
buf[n++] = *fp->_p;
|
|
fp->_p++;
|
|
fp->_r--;
|
|
mbs = initial;
|
|
nconv = mbrtowc(wcp, buf, n, &mbs);
|
|
if (nconv == (size_t)-1) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
if (nconv == 0)
|
|
*wcp = L'\0';
|
|
if (nconv != (size_t)-2) {
|
|
if (iswspace(*wcp)) {
|
|
while (n != 0) {
|
|
n--;
|
|
(void)ungetc(buf[n],
|
|
fp);
|
|
}
|
|
break;
|
|
}
|
|
nread += (int)n;
|
|
width--;
|
|
if (!(flags & SUPPRESS))
|
|
wcp++;
|
|
n = 0;
|
|
}
|
|
if (fp->_r <= 0 && __srefill(fp)) {
|
|
if (n != 0) {
|
|
fp->_flags |= __SERR;
|
|
goto input_failure;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!(flags & SUPPRESS)) {
|
|
*wcp = L'\0';
|
|
nassigned++;
|
|
}
|
|
} else if (flags & SUPPRESS) {
|
|
n = 0;
|
|
while (!isspace(*fp->_p)) {
|
|
n++, fp->_r--, fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (fp->_r <= 0 && __srefill(fp))
|
|
break;
|
|
}
|
|
nread += (int)n;
|
|
} else {
|
|
p0 = p = va_arg(ap, char *);
|
|
while (!isspace(*fp->_p)) {
|
|
fp->_r--;
|
|
*p++ = *fp->_p++;
|
|
if (--width == 0)
|
|
break;
|
|
if (fp->_r <= 0 && __srefill(fp))
|
|
break;
|
|
}
|
|
*p = 0;
|
|
nread += (int)(p - p0);
|
|
nassigned++;
|
|
}
|
|
nconversions++;
|
|
continue;
|
|
|
|
case CT_INT:
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
/* scan an integer as if by the conversion function */
|
|
#ifdef hardway
|
|
if (width == 0 || width > sizeof(buf) - 1)
|
|
width = sizeof(buf) - 1;
|
|
#else
|
|
/* size_t is unsigned, hence this optimisation */
|
|
if (--width > sizeof(buf) - 2)
|
|
width = sizeof(buf) - 2;
|
|
width++;
|
|
#endif
|
|
flags |= SIGNOK | NDIGITS | NZDIGITS;
|
|
for (p = buf; width; width--) {
|
|
c = *fp->_p;
|
|
/*
|
|
* Switch on the character; `goto ok'
|
|
* if we accept it as a part of number.
|
|
*/
|
|
switch (c) {
|
|
|
|
/*
|
|
* The digit 0 is always legal, but is
|
|
* special. For %i conversions, if no
|
|
* digits (zero or nonzero) have been
|
|
* scanned (only signs), we will have
|
|
* base==0. In that case, we should set
|
|
* it to 8 and enable 0x prefixing.
|
|
* Also, if we have not scanned zero digits
|
|
* before this, do not turn off prefixing
|
|
* (someone else will turn it off if we
|
|
* have scanned any nonzero digits).
|
|
*/
|
|
case '0':
|
|
if (base == 0) {
|
|
base = 8;
|
|
flags |= PFXOK;
|
|
}
|
|
if (flags & NZDIGITS)
|
|
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
|
|
else
|
|
flags &= ~(SIGNOK|PFXOK|NDIGITS);
|
|
goto ok;
|
|
|
|
/* 1 through 7 always legal */
|
|
case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7':
|
|
base = basefix[base];
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
|
goto ok;
|
|
|
|
/* digits 8 and 9 ok iff decimal or hex */
|
|
case '8': case '9':
|
|
base = basefix[base];
|
|
if (base <= 8)
|
|
break; /* not legal here */
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
|
goto ok;
|
|
|
|
/* letters ok iff hex */
|
|
case 'A': case 'B': case 'C':
|
|
case 'D': case 'E': case 'F':
|
|
case 'a': case 'b': case 'c':
|
|
case 'd': case 'e': case 'f':
|
|
/* no need to fix base here */
|
|
if (base <= 10)
|
|
break; /* not legal here */
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
|
goto ok;
|
|
|
|
/* sign ok only as first character */
|
|
case '+': case '-':
|
|
if (flags & SIGNOK) {
|
|
flags &= ~SIGNOK;
|
|
flags |= HAVESIGN;
|
|
goto ok;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* x ok iff flag still set & 2nd char (or
|
|
* 3rd char if we have a sign).
|
|
*/
|
|
case 'x': case 'X':
|
|
if (flags & PFXOK && p ==
|
|
buf + 1 + !!(flags & HAVESIGN)) {
|
|
base = 16; /* if %i */
|
|
flags &= ~PFXOK;
|
|
goto ok;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we got here, c is not a legal character
|
|
* for a number. Stop accumulating digits.
|
|
*/
|
|
break;
|
|
ok:
|
|
/*
|
|
* c is legal: store it and look at the next.
|
|
*/
|
|
*p++ = (char)c;
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else if (__srefill(fp))
|
|
break; /* EOF */
|
|
}
|
|
/*
|
|
* If we had only a sign, it is no good; push
|
|
* back the sign. If the number ends in `x',
|
|
* it was [sign] '0' 'x', so push back the x
|
|
* and treat it as [sign] '0'.
|
|
*/
|
|
if (flags & NDIGITS) {
|
|
if (p > buf)
|
|
(void)ungetc(*(u_char *)--p, fp);
|
|
goto match_failure;
|
|
}
|
|
c = ((u_char *)p)[-1];
|
|
if (c == 'x' || c == 'X') {
|
|
--p;
|
|
(void)ungetc(c, fp);
|
|
}
|
|
if ((flags & SUPPRESS) == 0) {
|
|
//uintmax_t res;
|
|
// Use a union to get around the truncation warnings.
|
|
union {
|
|
uintmax_t umax;
|
|
intmax_t imax;
|
|
void *vp;
|
|
ptrdiff_t pdt;
|
|
size_t sz;
|
|
long long ll;
|
|
long lo;
|
|
int in;
|
|
short hw;
|
|
char ch;
|
|
} res;
|
|
|
|
*p = 0;
|
|
if ((flags & UNSIGNED) == 0)
|
|
res.imax = strtoimax(buf, (char **)NULL, base);
|
|
else
|
|
res.umax = strtoumax(buf, (char **)NULL, base);
|
|
if (flags & POINTER)
|
|
*va_arg(ap, void **) = res.vp;
|
|
//(void *)((uintptr_t)res);
|
|
else if (flags & SHORTSHORT)
|
|
*va_arg(ap, char *) = res.ch;
|
|
else if (flags & SHORT)
|
|
*va_arg(ap, short *) = res.hw;
|
|
else if (flags & LONG)
|
|
*va_arg(ap, long *) = res.lo;
|
|
else if (flags & LONGLONG)
|
|
*va_arg(ap, long long *) = res.ll;
|
|
else if (flags & INTMAXT)
|
|
*va_arg(ap, intmax_t *) = res.imax;
|
|
else if (flags & PTRDIFFT)
|
|
*va_arg(ap, ptrdiff_t *) = res.pdt;
|
|
//(ptrdiff_t)res;
|
|
else if (flags & SIZET)
|
|
*va_arg(ap, size_t *) = res.sz;
|
|
else
|
|
*va_arg(ap, int *) = res.in;
|
|
nassigned++;
|
|
}
|
|
nread += (int)(p - buf);
|
|
nconversions++;
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
break;
|
|
|
|
#ifndef NO_FLOATING_POINT
|
|
case CT_FLOAT:
|
|
/* scan a floating point number as if by strtod */
|
|
if (width == 0 || width > sizeof(buf) - 1)
|
|
width = sizeof(buf) - 1;
|
|
if ((width = parsefloat(fp, buf, buf + width)) == 0)
|
|
goto match_failure;
|
|
if ((flags & SUPPRESS) == 0) {
|
|
if (flags & LONGDBL) {
|
|
long double **mp = (long double **)ap;
|
|
long double res = strtold(buf, &p);
|
|
|
|
*(*mp) = res;
|
|
ap += sizeof(long double *);
|
|
/*???*/ //*va_arg(ap, long double *) = res;
|
|
} else if (flags & LONG) {
|
|
double res = strtod(buf, &p);
|
|
*va_arg(ap, double *) = res;
|
|
} else {
|
|
float res = strtof(buf, &p);
|
|
*va_arg(ap, float *) = res;
|
|
}
|
|
if (__scanfdebug && p - buf != (ptrdiff_t)width)
|
|
abort();
|
|
nassigned++;
|
|
}
|
|
nread += (int)width;
|
|
nconversions++;
|
|
break;
|
|
#endif /* !NO_FLOATING_POINT */
|
|
}
|
|
}
|
|
input_failure:
|
|
//Print(L"%a: %d\n", __func__, __LINE__);
|
|
return (nconversions != 0 ? nassigned : EOF);
|
|
match_failure:
|
|
return (nassigned);
|
|
}
|
|
|
|
/*
|
|
* Fill in the given table from the scanset at the given format
|
|
* (just after `['). Return a pointer to the character past the
|
|
* closing `]'. The table has a 1 wherever characters should be
|
|
* considered part of the scanset.
|
|
*/
|
|
static const u_char *
|
|
__sccl(char *tab, const u_char *fmt)
|
|
{
|
|
int c, n, v, i;
|
|
|
|
_DIAGASSERT(tab != NULL);
|
|
_DIAGASSERT(fmt != NULL);
|
|
/* first `clear' the whole table */
|
|
c = *fmt++; /* first char hat => negated scanset */
|
|
if (c == '^') {
|
|
v = 1; /* default => accept */
|
|
c = *fmt++; /* get new first char */
|
|
} else
|
|
v = 0; /* default => reject */
|
|
|
|
/* XXX: Will not work if sizeof(tab*) > sizeof(char) */
|
|
(void)memset(tab, v, 256);
|
|
|
|
if (c == 0)
|
|
return (fmt - 1);/* format ended before closing ] */
|
|
|
|
/*
|
|
* Now set the entries corresponding to the actual scanset
|
|
* to the opposite of the above.
|
|
*
|
|
* The first character may be ']' (or '-') without being special;
|
|
* the last character may be '-'.
|
|
*/
|
|
v = 1 - v;
|
|
for (;;) {
|
|
tab[c] = (char)v; /* take character c */
|
|
doswitch:
|
|
n = *fmt++; /* and examine the next */
|
|
switch (n) {
|
|
|
|
case 0: /* format ended too soon */
|
|
return (fmt - 1);
|
|
|
|
case '-':
|
|
/*
|
|
* A scanset of the form
|
|
* [01+-]
|
|
* is defined as `the digit 0, the digit 1,
|
|
* the character +, the character -', but
|
|
* the effect of a scanset such as
|
|
* [a-zA-Z0-9]
|
|
* is implementation defined. The V7 Unix
|
|
* scanf treats `a-z' as `the letters a through
|
|
* z', but treats `a-a' as `the letter a, the
|
|
* character -, and the letter a'.
|
|
*
|
|
* For compatibility, the `-' is not considerd
|
|
* to define a range if the character following
|
|
* it is either a close bracket (required by ANSI)
|
|
* or is not numerically greater than the character
|
|
* we just stored in the table (c).
|
|
*/
|
|
n = *fmt;
|
|
if (n == ']' || (__collate_load_error ? n < c :
|
|
__collate_range_cmp(n, c) < 0)) {
|
|
c = '-';
|
|
break; /* resume the for(;;) */
|
|
}
|
|
fmt++;
|
|
/* fill in the range */
|
|
if (__collate_load_error) {
|
|
do
|
|
tab[++c] = (char)v;
|
|
while (c < n);
|
|
} else {
|
|
for (i = 0; i < 256; i ++)
|
|
if (__collate_range_cmp(c, i) < 0 &&
|
|
__collate_range_cmp(i, n) <= 0)
|
|
tab[i] = (char)v;
|
|
}
|
|
#if 1 /* XXX another disgusting compatibility hack */
|
|
c = n;
|
|
/*
|
|
* Alas, the V7 Unix scanf also treats formats
|
|
* such as [a-c-e] as `the letters a through e'.
|
|
* This too is permitted by the standard....
|
|
*/
|
|
goto doswitch;
|
|
#else
|
|
c = *fmt++;
|
|
if (c == 0)
|
|
return (fmt - 1);
|
|
if (c == ']')
|
|
return (fmt);
|
|
#endif
|
|
|
|
case ']': /* end of scanset */
|
|
return (fmt);
|
|
|
|
default: /* just another character */
|
|
c = n;
|
|
break;
|
|
}
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#ifndef NO_FLOATING_POINT
|
|
static int
|
|
parsefloat(FILE *fp, char *buf, char *end)
|
|
{
|
|
char *commit, *p;
|
|
int infnanpos = 0;
|
|
enum {
|
|
S_START, S_GOTSIGN, S_INF, S_NAN, S_MAYBEHEX,
|
|
S_DIGITS, S_FRAC, S_EXP, S_EXPDIGITS
|
|
} state = S_START;
|
|
unsigned char c;
|
|
char decpt = *localeconv()->decimal_point;
|
|
_Bool gotmantdig = 0, ishex = 0;
|
|
|
|
if(fp == NULL) {
|
|
errno = EINVAL;
|
|
return (EOF);
|
|
}
|
|
|
|
/*
|
|
* We set commit = p whenever the string we have read so far
|
|
* constitutes a valid representation of a floating point
|
|
* number by itself. At some point, the parse will complete
|
|
* or fail, and we will ungetc() back to the last commit point.
|
|
* To ensure that the file offset gets updated properly, it is
|
|
* always necessary to read at least one character that doesn't
|
|
* match; thus, we can't short-circuit "infinity" or "nan(...)".
|
|
*/
|
|
commit = buf - 1;
|
|
for (p = buf; p < end; ) {
|
|
c = *fp->_p;
|
|
reswitch:
|
|
switch (state) {
|
|
case S_START:
|
|
state = S_GOTSIGN;
|
|
if (c == '-' || c == '+')
|
|
break;
|
|
else
|
|
goto reswitch;
|
|
case S_GOTSIGN:
|
|
switch (c) {
|
|
case '0':
|
|
state = S_MAYBEHEX;
|
|
commit = p;
|
|
break;
|
|
case 'I':
|
|
case 'i':
|
|
state = S_INF;
|
|
break;
|
|
case 'N':
|
|
case 'n':
|
|
state = S_NAN;
|
|
break;
|
|
default:
|
|
state = S_DIGITS;
|
|
goto reswitch;
|
|
}
|
|
break;
|
|
case S_INF:
|
|
if (infnanpos > 6 ||
|
|
(c != "nfinity"[infnanpos] &&
|
|
c != "NFINITY"[infnanpos]))
|
|
goto parsedone;
|
|
if (infnanpos == 1 || infnanpos == 6)
|
|
commit = p; /* inf or infinity */
|
|
infnanpos++;
|
|
break;
|
|
case S_NAN:
|
|
switch (infnanpos) {
|
|
case -1: /* XXX kludge to deal with nan(...) */
|
|
goto parsedone;
|
|
case 0:
|
|
if (c != 'A' && c != 'a')
|
|
goto parsedone;
|
|
break;
|
|
case 1:
|
|
if (c != 'N' && c != 'n')
|
|
goto parsedone;
|
|
else
|
|
commit = p;
|
|
break;
|
|
case 2:
|
|
if (c != '(')
|
|
goto parsedone;
|
|
break;
|
|
default:
|
|
if (c == ')') {
|
|
commit = p;
|
|
infnanpos = -2;
|
|
} else if (!isalnum(c) && c != '_')
|
|
goto parsedone;
|
|
break;
|
|
}
|
|
infnanpos++;
|
|
break;
|
|
case S_MAYBEHEX:
|
|
state = S_DIGITS;
|
|
if (c == 'X' || c == 'x') {
|
|
ishex = 1;
|
|
break;
|
|
} else { /* we saw a '0', but no 'x' */
|
|
gotmantdig = 1;
|
|
goto reswitch;
|
|
}
|
|
case S_DIGITS:
|
|
if ((ishex && isxdigit(c)) || isdigit(c))
|
|
gotmantdig = 1;
|
|
else {
|
|
state = S_FRAC;
|
|
if (c != decpt)
|
|
goto reswitch;
|
|
}
|
|
if (gotmantdig)
|
|
commit = p;
|
|
break;
|
|
case S_FRAC:
|
|
if (((c == 'E' || c == 'e') && !ishex) ||
|
|
((c == 'P' || c == 'p') && ishex)) {
|
|
if (!gotmantdig)
|
|
goto parsedone;
|
|
else
|
|
state = S_EXP;
|
|
} else if ((ishex && isxdigit(c)) || isdigit(c)) {
|
|
commit = p;
|
|
gotmantdig = 1;
|
|
} else
|
|
goto parsedone;
|
|
break;
|
|
case S_EXP:
|
|
state = S_EXPDIGITS;
|
|
if (c == '-' || c == '+')
|
|
break;
|
|
else
|
|
goto reswitch;
|
|
case S_EXPDIGITS:
|
|
if (isdigit(c))
|
|
commit = p;
|
|
else
|
|
goto parsedone;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
*p++ = c;
|
|
if (--fp->_r > 0)
|
|
fp->_p++;
|
|
else if (__srefill(fp))
|
|
break; /* EOF */
|
|
}
|
|
|
|
parsedone:
|
|
while (commit < --p)
|
|
(void)ungetc(*(u_char *)p, fp);
|
|
*++commit = '\0';
|
|
return (int)(commit - buf);
|
|
}
|
|
#endif
|