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/* $OpenBSD: vfwscanf.c,v 1.6 2016/10/30 05:07:06 jsg Exp $ */ |
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/*- |
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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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* 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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* 3. 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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#include <inttypes.h> |
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#include <limits.h> |
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#include <locale.h> |
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#include <stdarg.h> |
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#include <stddef.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <wctype.h> |
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#include "local.h" |
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45 |
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#ifdef FLOATING_POINT |
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#include <float.h> |
47 |
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#include "floatio.h" |
48 |
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#endif |
49 |
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50 |
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#define BUF 513 /* Maximum length of numeric string. */ |
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52 |
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/* |
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* Flags used during conversion. |
54 |
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*/ |
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#define LONG 0x00001 /* l: long or double */ |
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#define LONGDBL 0x00002 /* L: long double */ |
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#define SHORT 0x00004 /* h: short */ |
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#define SHORTSHORT 0x00008 /* hh: 8 bit integer */ |
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#define LLONG 0x00010 /* ll: long long (+ deprecated q: quad) */ |
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#define POINTER 0x00020 /* p: void * (as hex) */ |
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#define SIZEINT 0x00040 /* z: (signed) size_t */ |
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#define MAXINT 0x00080 /* j: intmax_t */ |
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#define PTRINT 0x00100 /* t: ptrdiff_t */ |
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#define NOSKIP 0x00200 /* [ or c: do not skip blanks */ |
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#define SUPPRESS 0x00400 /* *: suppress assignment */ |
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#define UNSIGNED 0x00800 /* %[oupxX] conversions */ |
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|
68 |
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/* |
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* The following are used in numeric conversions only: |
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* SIGNOK, HAVESIGN, NDIGITS, DPTOK, and EXPOK are for floating point; |
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* SIGNOK, HAVESIGN, NDIGITS, PFXOK, and NZDIGITS are for integral. |
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*/ |
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#define SIGNOK 0x01000 /* +/- is (still) legal */ |
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#define HAVESIGN 0x02000 /* sign detected */ |
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#define NDIGITS 0x04000 /* no digits detected */ |
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#define DPTOK 0x08000 /* (float) decimal point is still legal */ |
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#define EXPOK 0x10000 /* (float) exponent (e+3, etc) still legal */ |
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80 |
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#define PFXOK 0x08000 /* 0x prefix is (still) legal */ |
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#define NZDIGITS 0x10000 /* no zero digits detected */ |
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83 |
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/* |
84 |
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* Conversion types. |
85 |
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*/ |
86 |
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#define CT_CHAR 0 /* %c conversion */ |
87 |
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#define CT_CCL 1 /* %[...] conversion */ |
88 |
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#define CT_STRING 2 /* %s conversion */ |
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#define CT_INT 3 /* integer, i.e., strtoimax or strtoumax */ |
90 |
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#define CT_FLOAT 4 /* floating, i.e., strtod */ |
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92 |
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#define u_char unsigned char |
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#define u_long unsigned long |
94 |
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95 |
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#define INCCL(_c) \ |
96 |
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(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \ |
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(wmemchr(ccls, (_c), ccle - ccls) != NULL)) |
98 |
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99 |
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/* |
100 |
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* vfwscanf |
101 |
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*/ |
102 |
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int |
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__vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, __va_list ap) |
104 |
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{ |
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wint_t c; /* character from format, or conversion */ |
106 |
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size_t width; /* field width, or 0 */ |
107 |
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wchar_t *p; /* points into all kinds of strings */ |
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int n; /* handy integer */ |
109 |
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int flags; /* flags as defined above */ |
110 |
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wchar_t *p0; /* saves original value of p when necessary */ |
111 |
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int nassigned; /* number of fields assigned */ |
112 |
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int nconversions; /* number of conversions */ |
113 |
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int nread; /* number of characters consumed from fp */ |
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int base; /* base argument to strtoimax/strtouimax */ |
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wchar_t buf[BUF]; /* buffer for numeric conversions */ |
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const wchar_t *ccls; /* character class start */ |
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const wchar_t *ccle; /* character class end */ |
118 |
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int cclcompl; /* ccl is complemented? */ |
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wint_t wi; /* handy wint_t */ |
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char *mbp; /* multibyte string pointer for %c %s %[ */ |
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size_t nconv; /* number of bytes in mb. conversion */ |
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char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */ |
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mbstate_t mbs; |
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#ifdef FLOATING_POINT |
125 |
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wchar_t decimal_point = 0; |
126 |
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#endif |
127 |
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128 |
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/* `basefix' is used to avoid `if' tests in the integer scanner */ |
129 |
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static short basefix[17] = |
130 |
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{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; |
131 |
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132 |
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_SET_ORIENTATION(fp, 1); |
133 |
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134 |
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nassigned = 0; |
135 |
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nconversions = 0; |
136 |
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nread = 0; |
137 |
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base = 0; /* XXX just to keep gcc happy */ |
138 |
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ccls = ccle = NULL; |
139 |
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for (;;) { |
140 |
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c = *fmt++; |
141 |
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if (c == 0) { |
142 |
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return (nassigned); |
143 |
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} |
144 |
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if (iswspace(c)) { |
145 |
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while ((c = __fgetwc_unlock(fp)) != WEOF && |
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iswspace(c)) |
147 |
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; |
148 |
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if (c != WEOF) |
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__ungetwc(c, fp); |
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continue; |
151 |
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} |
152 |
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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. |
159 |
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*/ |
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again: c = *fmt++; |
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switch (c) { |
162 |
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case '%': |
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literal: |
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if ((wi = __fgetwc_unlock(fp)) == WEOF) |
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goto input_failure; |
166 |
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if (wi != c) { |
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__ungetwc(wi, fp); |
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goto input_failure; |
169 |
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} |
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nread++; |
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continue; |
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173 |
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case '*': |
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flags |= SUPPRESS; |
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goto again; |
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case 'j': |
177 |
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flags |= MAXINT; |
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goto again; |
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case 'L': |
180 |
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flags |= LONGDBL; |
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goto again; |
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case 'h': |
183 |
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if (*fmt == 'h') { |
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fmt++; |
185 |
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flags |= SHORTSHORT; |
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} else { |
187 |
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flags |= SHORT; |
188 |
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} |
189 |
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goto again; |
190 |
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case 'l': |
191 |
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if (*fmt == 'l') { |
192 |
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fmt++; |
193 |
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flags |= LLONG; |
194 |
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} else { |
195 |
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flags |= LONG; |
196 |
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} |
197 |
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goto again; |
198 |
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case 'q': |
199 |
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flags |= LLONG; /* deprecated */ |
200 |
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goto again; |
201 |
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case 't': |
202 |
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flags |= PTRINT; |
203 |
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goto again; |
204 |
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case 'z': |
205 |
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flags |= SIZEINT; |
206 |
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goto again; |
207 |
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208 |
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case '0': case '1': case '2': case '3': case '4': |
209 |
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case '5': case '6': case '7': case '8': case '9': |
210 |
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width = width * 10 + c - '0'; |
211 |
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goto again; |
212 |
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213 |
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/* |
214 |
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* Conversions. |
215 |
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* Those marked `compat' are for 4.[123]BSD compatibility. |
216 |
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* |
217 |
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* (According to ANSI, E and X formats are supposed |
218 |
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* to the same as e and x. Sorry about that.) |
219 |
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*/ |
220 |
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case 'D': /* compat */ |
221 |
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flags |= LONG; |
222 |
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/* FALLTHROUGH */ |
223 |
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case 'd': |
224 |
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c = CT_INT; |
225 |
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base = 10; |
226 |
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break; |
227 |
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|
228 |
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case 'i': |
229 |
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c = CT_INT; |
230 |
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base = 0; |
231 |
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break; |
232 |
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|
233 |
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case 'O': /* compat */ |
234 |
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flags |= LONG; |
235 |
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/* FALLTHROUGH */ |
236 |
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case 'o': |
237 |
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c = CT_INT; |
238 |
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flags |= UNSIGNED; |
239 |
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base = 8; |
240 |
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break; |
241 |
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|
242 |
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case 'u': |
243 |
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c = CT_INT; |
244 |
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flags |= UNSIGNED; |
245 |
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base = 10; |
246 |
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break; |
247 |
|
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|
248 |
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case 'X': |
249 |
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case 'x': |
250 |
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flags |= PFXOK; /* enable 0x prefixing */ |
251 |
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c = CT_INT; |
252 |
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flags |= UNSIGNED; |
253 |
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base = 16; |
254 |
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break; |
255 |
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|
256 |
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#ifdef FLOATING_POINT |
257 |
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case 'e': case 'E': |
258 |
|
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case 'f': case 'F': |
259 |
|
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case 'g': case 'G': |
260 |
|
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case 'a': case 'A': |
261 |
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c = CT_FLOAT; |
262 |
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break; |
263 |
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#endif |
264 |
|
|
|
265 |
|
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case 's': |
266 |
|
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c = CT_STRING; |
267 |
|
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break; |
268 |
|
|
|
269 |
|
|
case '[': |
270 |
|
|
ccls = fmt; |
271 |
|
|
if (*fmt == '^') { |
272 |
|
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cclcompl = 1; |
273 |
|
|
fmt++; |
274 |
|
|
} else |
275 |
|
|
cclcompl = 0; |
276 |
|
|
if (*fmt == ']') |
277 |
|
|
fmt++; |
278 |
|
|
while (*fmt != '\0' && *fmt != ']') |
279 |
|
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fmt++; |
280 |
|
|
ccle = fmt; |
281 |
|
|
fmt++; |
282 |
|
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flags |= NOSKIP; |
283 |
|
|
c = CT_CCL; |
284 |
|
|
break; |
285 |
|
|
|
286 |
|
|
case 'c': |
287 |
|
|
flags |= NOSKIP; |
288 |
|
|
c = CT_CHAR; |
289 |
|
|
break; |
290 |
|
|
|
291 |
|
|
case 'p': /* pointer format is like hex */ |
292 |
|
|
flags |= POINTER | PFXOK; |
293 |
|
|
c = CT_INT; |
294 |
|
|
flags |= UNSIGNED; |
295 |
|
|
base = 16; |
296 |
|
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break; |
297 |
|
|
|
298 |
|
|
case 'n': |
299 |
|
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nconversions++; |
300 |
|
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if (flags & SUPPRESS) |
301 |
|
|
continue; |
302 |
|
|
if (flags & SHORTSHORT) |
303 |
|
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*va_arg(ap, signed char *) = nread; |
304 |
|
|
else if (flags & SHORT) |
305 |
|
|
*va_arg(ap, short *) = nread; |
306 |
|
|
else if (flags & LONG) |
307 |
|
|
*va_arg(ap, long *) = nread; |
308 |
|
|
else if (flags & SIZEINT) |
309 |
|
|
*va_arg(ap, ssize_t *) = nread; |
310 |
|
|
else if (flags & PTRINT) |
311 |
|
|
*va_arg(ap, ptrdiff_t *) = nread; |
312 |
|
|
else if (flags & LLONG) |
313 |
|
|
*va_arg(ap, long long *) = nread; |
314 |
|
|
else if (flags & MAXINT) |
315 |
|
|
*va_arg(ap, intmax_t *) = nread; |
316 |
|
|
else |
317 |
|
|
*va_arg(ap, int *) = nread; |
318 |
|
|
continue; |
319 |
|
|
|
320 |
|
|
/* |
321 |
|
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* Disgusting backwards compatibility hacks. XXX |
322 |
|
|
*/ |
323 |
|
|
case '\0': /* compat */ |
324 |
|
|
return (EOF); |
325 |
|
|
|
326 |
|
|
default: /* compat */ |
327 |
|
|
if (iswupper(c)) |
328 |
|
|
flags |= LONG; |
329 |
|
|
c = CT_INT; |
330 |
|
|
base = 10; |
331 |
|
|
break; |
332 |
|
|
} |
333 |
|
|
|
334 |
|
|
/* |
335 |
|
|
* Consume leading white space, except for formats |
336 |
|
|
* that suppress this. |
337 |
|
|
*/ |
338 |
|
|
if ((flags & NOSKIP) == 0) { |
339 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
340 |
|
|
iswspace(wi)) |
341 |
|
|
nread++; |
342 |
|
|
if (wi == WEOF) |
343 |
|
|
goto input_failure; |
344 |
|
|
__ungetwc(wi, fp); |
345 |
|
|
} |
346 |
|
|
|
347 |
|
|
/* |
348 |
|
|
* Do the conversion. |
349 |
|
|
*/ |
350 |
|
|
switch (c) { |
351 |
|
|
|
352 |
|
|
case CT_CHAR: |
353 |
|
|
/* scan arbitrary characters (sets NOSKIP) */ |
354 |
|
|
if (width == 0) |
355 |
|
|
width = 1; |
356 |
|
|
if (flags & LONG) { |
357 |
|
|
if (!(flags & SUPPRESS)) |
358 |
|
|
p = va_arg(ap, wchar_t *); |
359 |
|
|
n = 0; |
360 |
|
|
while (width-- != 0 && |
361 |
|
|
(wi = __fgetwc_unlock(fp)) != WEOF) { |
362 |
|
|
if (!(flags & SUPPRESS)) |
363 |
|
|
*p++ = (wchar_t)wi; |
364 |
|
|
n++; |
365 |
|
|
} |
366 |
|
|
if (n == 0) |
367 |
|
|
goto input_failure; |
368 |
|
|
nread += n; |
369 |
|
|
if (!(flags & SUPPRESS)) |
370 |
|
|
nassigned++; |
371 |
|
|
} else { |
372 |
|
|
if (!(flags & SUPPRESS)) |
373 |
|
|
mbp = va_arg(ap, char *); |
374 |
|
|
n = 0; |
375 |
|
|
bzero(&mbs, sizeof(mbs)); |
376 |
|
|
while (width != 0 && |
377 |
|
|
(wi = __fgetwc_unlock(fp)) != WEOF) { |
378 |
|
|
if (width >= MB_CUR_MAX && |
379 |
|
|
!(flags & SUPPRESS)) { |
380 |
|
|
nconv = wcrtomb(mbp, wi, &mbs); |
381 |
|
|
if (nconv == (size_t)-1) |
382 |
|
|
goto input_failure; |
383 |
|
|
} else { |
384 |
|
|
nconv = wcrtomb(mbbuf, wi, |
385 |
|
|
&mbs); |
386 |
|
|
if (nconv == (size_t)-1) |
387 |
|
|
goto input_failure; |
388 |
|
|
if (nconv > width) { |
389 |
|
|
__ungetwc(wi, fp); |
390 |
|
|
break; |
391 |
|
|
} |
392 |
|
|
if (!(flags & SUPPRESS)) |
393 |
|
|
memcpy(mbp, mbbuf, |
394 |
|
|
nconv); |
395 |
|
|
} |
396 |
|
|
if (!(flags & SUPPRESS)) |
397 |
|
|
mbp += nconv; |
398 |
|
|
width -= nconv; |
399 |
|
|
n++; |
400 |
|
|
} |
401 |
|
|
if (n == 0) |
402 |
|
|
goto input_failure; |
403 |
|
|
nread += n; |
404 |
|
|
if (!(flags & SUPPRESS)) |
405 |
|
|
nassigned++; |
406 |
|
|
} |
407 |
|
|
nconversions++; |
408 |
|
|
break; |
409 |
|
|
|
410 |
|
|
case CT_CCL: |
411 |
|
|
/* scan a (nonempty) character class (sets NOSKIP) */ |
412 |
|
|
if (width == 0) |
413 |
|
|
width = (size_t)~0; /* `infinity' */ |
414 |
|
|
/* take only those things in the class */ |
415 |
|
|
if ((flags & SUPPRESS) && (flags & LONG)) { |
416 |
|
|
n = 0; |
417 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
418 |
|
|
width-- != 0 && INCCL(wi)) |
419 |
|
|
n++; |
420 |
|
|
if (wi != WEOF) |
421 |
|
|
__ungetwc(wi, fp); |
422 |
|
|
if (n == 0) |
423 |
|
|
goto match_failure; |
424 |
|
|
} else if (flags & LONG) { |
425 |
|
|
p0 = p = va_arg(ap, wchar_t *); |
426 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
427 |
|
|
width-- != 0 && INCCL(wi)) |
428 |
|
|
*p++ = (wchar_t)wi; |
429 |
|
|
if (wi != WEOF) |
430 |
|
|
__ungetwc(wi, fp); |
431 |
|
|
n = p - p0; |
432 |
|
|
if (n == 0) |
433 |
|
|
goto match_failure; |
434 |
|
|
*p = 0; |
435 |
|
|
nassigned++; |
436 |
|
|
} else { |
437 |
|
|
if (!(flags & SUPPRESS)) |
438 |
|
|
mbp = va_arg(ap, char *); |
439 |
|
|
n = 0; |
440 |
|
|
bzero(&mbs, sizeof(mbs)); |
441 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
442 |
|
|
width != 0 && INCCL(wi)) { |
443 |
|
|
if (width >= MB_CUR_MAX && |
444 |
|
|
!(flags & SUPPRESS)) { |
445 |
|
|
nconv = wcrtomb(mbp, wi, &mbs); |
446 |
|
|
if (nconv == (size_t)-1) |
447 |
|
|
goto input_failure; |
448 |
|
|
} else { |
449 |
|
|
nconv = wcrtomb(mbbuf, wi, |
450 |
|
|
&mbs); |
451 |
|
|
if (nconv == (size_t)-1) |
452 |
|
|
goto input_failure; |
453 |
|
|
if (nconv > width) |
454 |
|
|
break; |
455 |
|
|
if (!(flags & SUPPRESS)) |
456 |
|
|
memcpy(mbp, mbbuf, |
457 |
|
|
nconv); |
458 |
|
|
} |
459 |
|
|
if (!(flags & SUPPRESS)) |
460 |
|
|
mbp += nconv; |
461 |
|
|
width -= nconv; |
462 |
|
|
n++; |
463 |
|
|
} |
464 |
|
|
if (wi != WEOF) |
465 |
|
|
__ungetwc(wi, fp); |
466 |
|
|
if (!(flags & SUPPRESS)) { |
467 |
|
|
*mbp = 0; |
468 |
|
|
nassigned++; |
469 |
|
|
} |
470 |
|
|
} |
471 |
|
|
nread += n; |
472 |
|
|
nconversions++; |
473 |
|
|
break; |
474 |
|
|
|
475 |
|
|
case CT_STRING: |
476 |
|
|
/* like CCL, but zero-length string OK, & no NOSKIP */ |
477 |
|
|
if (width == 0) |
478 |
|
|
width = (size_t)~0; |
479 |
|
|
if ((flags & SUPPRESS) && (flags & LONG)) { |
480 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
481 |
|
|
width-- != 0 && |
482 |
|
|
!iswspace(wi)) |
483 |
|
|
nread++; |
484 |
|
|
if (wi != WEOF) |
485 |
|
|
__ungetwc(wi, fp); |
486 |
|
|
} else if (flags & LONG) { |
487 |
|
|
p0 = p = va_arg(ap, wchar_t *); |
488 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
489 |
|
|
width-- != 0 && |
490 |
|
|
!iswspace(wi)) { |
491 |
|
|
*p++ = (wchar_t)wi; |
492 |
|
|
nread++; |
493 |
|
|
} |
494 |
|
|
if (wi != WEOF) |
495 |
|
|
__ungetwc(wi, fp); |
496 |
|
|
*p = 0; |
497 |
|
|
nassigned++; |
498 |
|
|
} else { |
499 |
|
|
if (!(flags & SUPPRESS)) |
500 |
|
|
mbp = va_arg(ap, char *); |
501 |
|
|
bzero(&mbs, sizeof(mbs)); |
502 |
|
|
while ((wi = __fgetwc_unlock(fp)) != WEOF && |
503 |
|
|
width != 0 && |
504 |
|
|
!iswspace(wi)) { |
505 |
|
|
if (width >= MB_CUR_MAX && |
506 |
|
|
!(flags & SUPPRESS)) { |
507 |
|
|
nconv = wcrtomb(mbp, wi, &mbs); |
508 |
|
|
if (nconv == (size_t)-1) |
509 |
|
|
goto input_failure; |
510 |
|
|
} else { |
511 |
|
|
nconv = wcrtomb(mbbuf, wi, |
512 |
|
|
&mbs); |
513 |
|
|
if (nconv == (size_t)-1) |
514 |
|
|
goto input_failure; |
515 |
|
|
if (nconv > width) |
516 |
|
|
break; |
517 |
|
|
if (!(flags & SUPPRESS)) |
518 |
|
|
memcpy(mbp, mbbuf, |
519 |
|
|
nconv); |
520 |
|
|
} |
521 |
|
|
if (!(flags & SUPPRESS)) |
522 |
|
|
mbp += nconv; |
523 |
|
|
width -= nconv; |
524 |
|
|
nread++; |
525 |
|
|
} |
526 |
|
|
if (wi != WEOF) |
527 |
|
|
__ungetwc(wi, fp); |
528 |
|
|
if (!(flags & SUPPRESS)) { |
529 |
|
|
*mbp = 0; |
530 |
|
|
nassigned++; |
531 |
|
|
} |
532 |
|
|
} |
533 |
|
|
nconversions++; |
534 |
|
|
continue; |
535 |
|
|
|
536 |
|
|
case CT_INT: |
537 |
|
|
/* scan an integer as if by strtoimax/strtoumax */ |
538 |
|
|
if (width == 0 || width > sizeof(buf) / |
539 |
|
|
sizeof(*buf) - 1) |
540 |
|
|
width = sizeof(buf) / sizeof(*buf) - 1; |
541 |
|
|
flags |= SIGNOK | NDIGITS | NZDIGITS; |
542 |
|
|
for (p = buf; width; width--) { |
543 |
|
|
c = __fgetwc_unlock(fp); |
544 |
|
|
/* |
545 |
|
|
* Switch on the character; `goto ok' |
546 |
|
|
* if we accept it as a part of number. |
547 |
|
|
*/ |
548 |
|
|
switch (c) { |
549 |
|
|
|
550 |
|
|
/* |
551 |
|
|
* The digit 0 is always legal, but is |
552 |
|
|
* special. For %i conversions, if no |
553 |
|
|
* digits (zero or nonzero) have been |
554 |
|
|
* scanned (only signs), we will have |
555 |
|
|
* base==0. In that case, we should set |
556 |
|
|
* it to 8 and enable 0x prefixing. |
557 |
|
|
* Also, if we have not scanned zero digits |
558 |
|
|
* before this, do not turn off prefixing |
559 |
|
|
* (someone else will turn it off if we |
560 |
|
|
* have scanned any nonzero digits). |
561 |
|
|
*/ |
562 |
|
|
case '0': |
563 |
|
|
if (base == 0) { |
564 |
|
|
base = 8; |
565 |
|
|
flags |= PFXOK; |
566 |
|
|
} |
567 |
|
|
if (flags & NZDIGITS) |
568 |
|
|
flags &= ~(SIGNOK|NZDIGITS|NDIGITS); |
569 |
|
|
else |
570 |
|
|
flags &= ~(SIGNOK|PFXOK|NDIGITS); |
571 |
|
|
goto ok; |
572 |
|
|
|
573 |
|
|
/* 1 through 7 always legal */ |
574 |
|
|
case '1': case '2': case '3': |
575 |
|
|
case '4': case '5': case '6': case '7': |
576 |
|
|
base = basefix[base]; |
577 |
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
578 |
|
|
goto ok; |
579 |
|
|
|
580 |
|
|
/* digits 8 and 9 ok iff decimal or hex */ |
581 |
|
|
case '8': case '9': |
582 |
|
|
base = basefix[base]; |
583 |
|
|
if (base <= 8) |
584 |
|
|
break; /* not legal here */ |
585 |
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
586 |
|
|
goto ok; |
587 |
|
|
|
588 |
|
|
/* letters ok iff hex */ |
589 |
|
|
case 'A': case 'B': case 'C': |
590 |
|
|
case 'D': case 'E': case 'F': |
591 |
|
|
case 'a': case 'b': case 'c': |
592 |
|
|
case 'd': case 'e': case 'f': |
593 |
|
|
/* no need to fix base here */ |
594 |
|
|
if (base <= 10) |
595 |
|
|
break; /* not legal here */ |
596 |
|
|
flags &= ~(SIGNOK | PFXOK | NDIGITS); |
597 |
|
|
goto ok; |
598 |
|
|
|
599 |
|
|
/* sign ok only as first character */ |
600 |
|
|
case '+': case '-': |
601 |
|
|
if (flags & SIGNOK) { |
602 |
|
|
flags &= ~SIGNOK; |
603 |
|
|
flags |= HAVESIGN; |
604 |
|
|
goto ok; |
605 |
|
|
} |
606 |
|
|
break; |
607 |
|
|
|
608 |
|
|
/* |
609 |
|
|
* x ok iff flag still set and 2nd char (or |
610 |
|
|
* 3rd char if we have a sign). |
611 |
|
|
*/ |
612 |
|
|
case 'x': case 'X': |
613 |
|
|
if ((flags & PFXOK) && p == |
614 |
|
|
buf + 1 + !!(flags & HAVESIGN)) { |
615 |
|
|
base = 16; /* if %i */ |
616 |
|
|
flags &= ~PFXOK; |
617 |
|
|
goto ok; |
618 |
|
|
} |
619 |
|
|
break; |
620 |
|
|
} |
621 |
|
|
|
622 |
|
|
/* |
623 |
|
|
* If we got here, c is not a legal character |
624 |
|
|
* for a number. Stop accumulating digits. |
625 |
|
|
*/ |
626 |
|
|
if (c != WEOF) |
627 |
|
|
__ungetwc(c, fp); |
628 |
|
|
break; |
629 |
|
|
ok: |
630 |
|
|
/* |
631 |
|
|
* c is legal: store it and look at the next. |
632 |
|
|
*/ |
633 |
|
|
*p++ = (wchar_t)c; |
634 |
|
|
} |
635 |
|
|
/* |
636 |
|
|
* If we had only a sign, it is no good; push |
637 |
|
|
* back the sign. If the number ends in `x', |
638 |
|
|
* it was [sign] '0' 'x', so push back the x |
639 |
|
|
* and treat it as [sign] '0'. |
640 |
|
|
*/ |
641 |
|
|
if (flags & NDIGITS) { |
642 |
|
|
if (p > buf) |
643 |
|
|
__ungetwc(*--p, fp); |
644 |
|
|
goto match_failure; |
645 |
|
|
} |
646 |
|
|
c = p[-1]; |
647 |
|
|
if (c == 'x' || c == 'X') { |
648 |
|
|
--p; |
649 |
|
|
__ungetwc(c, fp); |
650 |
|
|
} |
651 |
|
|
if ((flags & SUPPRESS) == 0) { |
652 |
|
|
uintmax_t res; |
653 |
|
|
|
654 |
|
|
*p = '\0'; |
655 |
|
|
if (flags & UNSIGNED) |
656 |
|
|
res = wcstoimax(buf, NULL, base); |
657 |
|
|
else |
658 |
|
|
res = wcstoumax(buf, NULL, base); |
659 |
|
|
if (flags & POINTER) |
660 |
|
|
*va_arg(ap, void **) = |
661 |
|
|
(void *)(uintptr_t)res; |
662 |
|
|
else if (flags & MAXINT) |
663 |
|
|
*va_arg(ap, intmax_t *) = res; |
664 |
|
|
else if (flags & LLONG) |
665 |
|
|
*va_arg(ap, long long *) = res; |
666 |
|
|
else if (flags & SIZEINT) |
667 |
|
|
*va_arg(ap, ssize_t *) = res; |
668 |
|
|
else if (flags & PTRINT) |
669 |
|
|
*va_arg(ap, ptrdiff_t *) = res; |
670 |
|
|
else if (flags & LONG) |
671 |
|
|
*va_arg(ap, long *) = res; |
672 |
|
|
else if (flags & SHORT) |
673 |
|
|
*va_arg(ap, short *) = res; |
674 |
|
|
else if (flags & SHORTSHORT) |
675 |
|
|
*va_arg(ap, signed char *) = res; |
676 |
|
|
else |
677 |
|
|
*va_arg(ap, int *) = res; |
678 |
|
|
nassigned++; |
679 |
|
|
} |
680 |
|
|
nread += p - buf; |
681 |
|
|
nconversions++; |
682 |
|
|
break; |
683 |
|
|
|
684 |
|
|
#ifdef FLOATING_POINT |
685 |
|
|
case CT_FLOAT: |
686 |
|
|
/* scan a floating point number as if by strtod */ |
687 |
|
|
if (width == 0 || width > sizeof(buf) / |
688 |
|
|
sizeof(*buf) - 1) |
689 |
|
|
width = sizeof(buf) / sizeof(*buf) - 1; |
690 |
|
|
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK; |
691 |
|
|
for (p = buf; width; width--) { |
692 |
|
|
c = __fgetwc_unlock(fp); |
693 |
|
|
/* |
694 |
|
|
* This code mimicks the integer conversion |
695 |
|
|
* code, but is much simpler. |
696 |
|
|
*/ |
697 |
|
|
switch (c) { |
698 |
|
|
|
699 |
|
|
case '0': case '1': case '2': case '3': |
700 |
|
|
case '4': case '5': case '6': case '7': |
701 |
|
|
case '8': case '9': |
702 |
|
|
flags &= ~(SIGNOK | NDIGITS); |
703 |
|
|
goto fok; |
704 |
|
|
|
705 |
|
|
case '+': case '-': |
706 |
|
|
if (flags & SIGNOK) { |
707 |
|
|
flags &= ~SIGNOK; |
708 |
|
|
goto fok; |
709 |
|
|
} |
710 |
|
|
break; |
711 |
|
|
case 'e': case 'E': |
712 |
|
|
/* no exponent without some digits */ |
713 |
|
|
if ((flags&(NDIGITS|EXPOK)) == EXPOK) { |
714 |
|
|
flags = |
715 |
|
|
(flags & ~(EXPOK|DPTOK)) | |
716 |
|
|
SIGNOK | NDIGITS; |
717 |
|
|
goto fok; |
718 |
|
|
} |
719 |
|
|
break; |
720 |
|
|
default: |
721 |
|
|
if (decimal_point == 0) { |
722 |
|
|
bzero(&mbs, sizeof(mbs)); |
723 |
|
|
nconv = mbrtowc(&decimal_point, |
724 |
|
|
localeconv()->decimal_point, |
725 |
|
|
MB_CUR_MAX, &mbs); |
726 |
|
|
if (nconv == 0 || |
727 |
|
|
nconv == (size_t)-1 || |
728 |
|
|
nconv == (size_t)-2) |
729 |
|
|
decimal_point = '.'; |
730 |
|
|
} |
731 |
|
|
if (c == decimal_point && |
732 |
|
|
(flags & DPTOK)) { |
733 |
|
|
flags &= ~(SIGNOK | DPTOK); |
734 |
|
|
goto fok; |
735 |
|
|
} |
736 |
|
|
break; |
737 |
|
|
} |
738 |
|
|
if (c != WEOF) |
739 |
|
|
__ungetwc(c, fp); |
740 |
|
|
break; |
741 |
|
|
fok: |
742 |
|
|
*p++ = c; |
743 |
|
|
} |
744 |
|
|
/* |
745 |
|
|
* If no digits, might be missing exponent digits |
746 |
|
|
* (just give back the exponent) or might be missing |
747 |
|
|
* regular digits, but had sign and/or decimal point. |
748 |
|
|
*/ |
749 |
|
|
if (flags & NDIGITS) { |
750 |
|
|
if (flags & EXPOK) { |
751 |
|
|
/* no digits at all */ |
752 |
|
|
while (p > buf) |
753 |
|
|
__ungetwc(*--p, fp); |
754 |
|
|
goto match_failure; |
755 |
|
|
} |
756 |
|
|
/* just a bad exponent (e and maybe sign) */ |
757 |
|
|
c = *--p; |
758 |
|
|
if (c != 'e' && c != 'E') { |
759 |
|
|
__ungetwc(c, fp);/* sign */ |
760 |
|
|
c = *--p; |
761 |
|
|
} |
762 |
|
|
__ungetwc(c, fp); |
763 |
|
|
} |
764 |
|
|
if ((flags & SUPPRESS) == 0) { |
765 |
|
|
*p = 0; |
766 |
|
|
if (flags & LONGDBL) { |
767 |
|
|
long double res = wcstold(buf, NULL); |
768 |
|
|
*va_arg(ap, long double *) = res; |
769 |
|
|
} else if (flags & LONG) { |
770 |
|
|
double res = wcstod(buf, NULL); |
771 |
|
|
*va_arg(ap, double *) = res; |
772 |
|
|
} else { |
773 |
|
|
float res = wcstof(buf, NULL); |
774 |
|
|
*va_arg(ap, float *) = res; |
775 |
|
|
} |
776 |
|
|
nassigned++; |
777 |
|
|
} |
778 |
|
|
nread += p - buf; |
779 |
|
|
nconversions++; |
780 |
|
|
break; |
781 |
|
|
#endif /* FLOATING_POINT */ |
782 |
|
|
} |
783 |
|
|
} |
784 |
|
|
input_failure: |
785 |
|
|
return (nconversions != 0 ? nassigned : EOF); |
786 |
|
|
match_failure: |
787 |
|
|
return (nassigned); |
788 |
|
|
} |
789 |
|
|
|
790 |
|
|
int |
791 |
|
|
vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, __va_list ap) |
792 |
|
|
{ |
793 |
|
|
int r; |
794 |
|
|
|
795 |
|
|
FLOCKFILE(fp); |
796 |
|
|
r = __vfwscanf(fp, fmt, ap); |
797 |
|
|
FUNLOCKFILE(fp); |
798 |
|
|
return (r); |
799 |
|
|
} |
800 |
|
|
DEF_STRONG(vfwscanf); |