| /** @file | |
| valist worker function for the wide-character fscanf. | |
| Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR> | |
| This program and the accompanying materials are licensed and made available under | |
| the terms and conditions of the BSD License that accompanies this distribution. | |
| The full text of the license may be found at | |
| http://opensource.org/licenses/bsd-license. | |
| THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| * Copyright (c) 1990, 1993 | |
| * The Regents of the University of California. All rights reserved. | |
| * | |
| * This code is derived from software contributed to Berkeley by | |
| * Chris Torek. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * 3. All advertising materials mentioning features or use of this software | |
| * must display the following acknowledgement: | |
| * This product includes software developed by the University of | |
| * California, Berkeley and its contributors. | |
| * 4. Neither the name of the University nor the names of its contributors | |
| * may be used to endorse or promote products derived from this software | |
| * without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| * SUCH DAMAGE. | |
| FreeBSD: src/lib/libc/stdio/vfwscanf.c,v 1.12 2004/05/02 20:13:29 obrien Exp | |
| NetBSD: vfwscanf.c,v 1.2 2005/06/12 05:48:41 lukem Exp | |
| */ | |
| #include <LibConfig.h> | |
| #include <sys/EfiCdefs.h> | |
| #include "namespace.h" | |
| #include <ctype.h> | |
| #include <inttypes.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <stddef.h> | |
| #include <stdarg.h> | |
| #include <string.h> | |
| #include <limits.h> | |
| #include <wchar.h> | |
| #include <wctype.h> | |
| #include "reentrant.h" | |
| #include "local.h" | |
| #ifndef NO_FLOATING_POINT | |
| #include <locale.h> | |
| #endif | |
| #if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */ | |
| #pragma warning ( disable : 4244 ) // Allow wint_t to wchar_t conversions | |
| #pragma warning ( disable : 4305 ) // Allow truncation from UINT64 to void* | |
| #pragma warning ( disable : 4701 ) // Disable false warning for local variable p near line 375 | |
| #endif | |
| #define BUF 513 /* Maximum length of numeric string. */ | |
| /* | |
| * Flags used during conversion. | |
| */ | |
| #define LONG 0x01 /* l: long or double */ | |
| #define LONGDBL 0x02 /* L: long double */ | |
| #define SHORT 0x04 /* h: short */ | |
| #define SUPPRESS 0x08 /* *: suppress assignment */ | |
| #define POINTER 0x10 /* p: void * (as hex) */ | |
| #define NOSKIP 0x20 /* [ or c: do not skip blanks */ | |
| #define LONGLONG 0x400 /* ll: quad_t (+ deprecated q: quad) */ | |
| #define INTMAXT 0x800 /* j: intmax_t */ | |
| #define PTRDIFFT 0x1000 /* t: ptrdiff_t */ | |
| #define SIZET 0x2000 /* z: size_t */ | |
| #define SHORTSHORT 0x4000 /* hh: char */ | |
| #define UNSIGNED 0x8000 /* %[oupxX] conversions */ | |
| /* | |
| * The following are used in integral conversions only: | |
| * SIGNOK, NDIGITS, PFXOK, and NZDIGITS | |
| */ | |
| #define SIGNOK 0x40 /* +/- is (still) legal */ | |
| #define NDIGITS 0x80 /* no digits detected */ | |
| #define PFXOK 0x100 /* 0x prefix is (still) legal */ | |
| #define NZDIGITS 0x200 /* no zero digits detected */ | |
| #define HAVESIGN 0x10000 /* sign detected */ | |
| /* | |
| * Conversion types. | |
| */ | |
| #define CT_CHAR 0 /* %c conversion */ | |
| #define CT_CCL 1 /* %[...] conversion */ | |
| #define CT_STRING 2 /* %s conversion */ | |
| #define CT_INT 3 /* %[dioupxX] conversion */ | |
| #define CT_FLOAT 4 /* %[efgEFG] conversion */ | |
| static int parsefloat(FILE *, wchar_t *, wchar_t *); | |
| #define INCCL(_c) \ | |
| (cclcompl ? (wmemchr(ccls, (_c), (size_t)(ccle - ccls)) == NULL) : \ | |
| (wmemchr(ccls, (_c), (size_t)(ccle - ccls)) != NULL)) | |
| /* | |
| * MT-safe version. | |
| */ | |
| int | |
| vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap) | |
| { | |
| int ret; | |
| FLOCKFILE(fp); | |
| _SET_ORIENTATION(fp, 1); | |
| ret = __vfwscanf_unlocked(fp, fmt, ap); | |
| FUNLOCKFILE(fp); | |
| return (ret); | |
| } | |
| /* | |
| * Non-MT-safe version. | |
| */ | |
| int | |
| __vfwscanf_unlocked(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap) | |
| { | |
| wint_t c; /* character from format, or conversion */ | |
| size_t width; /* field width, or 0 */ | |
| wchar_t *p = NULL; /* points into all kinds of strings */ | |
| int n; /* handy integer */ | |
| int flags; /* flags as defined above */ | |
| wchar_t *p0; /* saves original value of p when necessary */ | |
| int nassigned; /* number of fields assigned */ | |
| int nconversions; /* number of conversions */ | |
| int nread; /* number of characters consumed from fp */ | |
| int base; /* base argument to conversion function */ | |
| wchar_t buf[BUF]; /* buffer for numeric conversions */ | |
| const wchar_t *ccls; /* character class start */ | |
| const wchar_t *ccle; /* character class end */ | |
| int cclcompl; /* ccl is complemented? */ | |
| wint_t wi; /* handy wint_t */ | |
| char *mbp; /* multibyte string pointer for %c %s %[ */ | |
| size_t nconv; /* number of bytes in mb. conversion */ | |
| char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */ | |
| mbstate_t mbs; | |
| static const mbstate_t initial = { 0 }; | |
| /* `basefix' is used to avoid `if' tests in the integer scanner */ | |
| static short basefix[17] = | |
| { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; | |
| nassigned = 0; | |
| nconversions = 0; | |
| nread = 0; | |
| ccls = NULL; | |
| ccle = NULL; | |
| base = 0; | |
| cclcompl = 0; | |
| mbp = NULL; | |
| for (;;) { | |
| c = *fmt++; | |
| if (c == 0) | |
| return (nassigned); | |
| if (iswspace(c)) { | |
| while ((c = __fgetwc_unlock(fp)) != WEOF && | |
| iswspace(c)) | |
| ; | |
| if (c != WEOF) | |
| ungetwc(c, fp); | |
| continue; | |
| } | |
| if (c != '%') | |
| goto literal; | |
| width = 0; | |
| flags = 0; | |
| /* | |
| * switch on the format. continue if done; | |
| * break once format type is derived. | |
| */ | |
| again: c = *fmt++; | |
| switch (c) { | |
| case '%': | |
| literal: | |
| if ((wi = __fgetwc_unlock(fp)) == WEOF) | |
| goto input_failure; | |
| if (wi != c) { | |
| ungetwc(wi, fp); | |
| goto match_failure; | |
| } | |
| nread++; | |
| continue; | |
| case '*': | |
| flags |= SUPPRESS; | |
| goto again; | |
| case 'j': | |
| flags |= INTMAXT; | |
| goto again; | |
| case 'l': | |
| if (flags & LONG) { | |
| flags &= ~LONG; | |
| flags |= LONGLONG; | |
| } else | |
| flags |= LONG; | |
| goto again; | |
| case 'q': | |
| flags |= LONGLONG; /* not quite */ | |
| goto again; | |
| case 't': | |
| flags |= PTRDIFFT; | |
| goto again; | |
| case 'z': | |
| flags |= SIZET; | |
| goto again; | |
| case 'L': | |
| flags |= LONGDBL; | |
| goto again; | |
| case 'h': | |
| if (flags & SHORT) { | |
| flags &= ~SHORT; | |
| flags |= SHORTSHORT; | |
| } else | |
| flags |= SHORT; | |
| goto again; | |
| case '0': case '1': case '2': case '3': case '4': | |
| case '5': case '6': case '7': case '8': case '9': | |
| width = width * 10 + c - '0'; | |
| goto again; | |
| /* | |
| * Conversions. | |
| */ | |
| case 'd': | |
| c = CT_INT; | |
| base = 10; | |
| break; | |
| case 'i': | |
| c = CT_INT; | |
| base = 0; | |
| break; | |
| case 'o': | |
| c = CT_INT; | |
| flags |= UNSIGNED; | |
| base = 8; | |
| break; | |
| case 'u': | |
| c = CT_INT; | |
| flags |= UNSIGNED; | |
| base = 10; | |
| break; | |
| case 'X': | |
| case 'x': | |
| flags |= PFXOK; /* enable 0x prefixing */ | |
| c = CT_INT; | |
| flags |= UNSIGNED; | |
| base = 16; | |
| break; | |
| #ifndef NO_FLOATING_POINT | |
| //case 'A': | |
| case 'E': case 'F': case 'G': | |
| //case 'a': | |
| case 'e': case 'f': case 'g': | |
| c = CT_FLOAT; | |
| break; | |
| #endif | |
| case 'S': | |
| flags |= LONG; | |
| /* FALLTHROUGH */ | |
| case 's': | |
| c = CT_STRING; | |
| break; | |
| case '[': | |
| ccls = fmt; | |
| if (*fmt == '^') { | |
| cclcompl = 1; | |
| fmt++; | |
| } else | |
| cclcompl = 0; | |
| if (*fmt == ']') | |
| fmt++; | |
| while (*fmt != '\0' && *fmt != ']') | |
| fmt++; | |
| ccle = fmt; | |
| fmt++; | |
| flags |= NOSKIP; | |
| c = CT_CCL; | |
| break; | |
| case 'C': | |
| flags |= LONG; | |
| /* FALLTHROUGH */ | |
| case 'c': | |
| flags |= NOSKIP; | |
| c = CT_CHAR; | |
| break; | |
| case 'p': /* pointer format is like hex */ | |
| flags |= POINTER | PFXOK; | |
| c = CT_INT; /* assumes sizeof(uintmax_t) */ | |
| flags |= UNSIGNED; /* >= sizeof(uintptr_t) */ | |
| base = 16; | |
| break; | |
| case 'n': | |
| nconversions++; | |
| if (flags & SUPPRESS) /* ??? */ | |
| continue; | |
| if (flags & SHORTSHORT) | |
| *va_arg(ap, char *) = (char)nread; | |
| else if (flags & SHORT) | |
| *va_arg(ap, short *) = (short)nread; | |
| else if (flags & LONG) | |
| *va_arg(ap, long *) = (long)nread; | |
| else if (flags & LONGLONG) | |
| *va_arg(ap, INT64 *) = (INT64)nread; // was quad_t | |
| else if (flags & INTMAXT) | |
| *va_arg(ap, intmax_t *) = (intmax_t)nread; | |
| else if (flags & SIZET) | |
| *va_arg(ap, size_t *) = (size_t)nread; | |
| else if (flags & PTRDIFFT) | |
| *va_arg(ap, ptrdiff_t *) = (ptrdiff_t)nread; | |
| else | |
| *va_arg(ap, int *) = nread; | |
| continue; | |
| default: | |
| goto match_failure; | |
| /* | |
| * Disgusting backwards compatibility hack. XXX | |
| */ | |
| case '\0': /* compat */ | |
| return (EOF); | |
| } | |
| /* | |
| * Consume leading white space, except for formats | |
| * that suppress this. | |
| */ | |
| if ((flags & NOSKIP) == 0) { | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && iswspace(wi)) | |
| nread++; | |
| if (wi == WEOF) | |
| goto input_failure; | |
| ungetwc(wi, fp); | |
| } | |
| /* | |
| * Do the conversion. | |
| */ | |
| switch (c) { | |
| case CT_CHAR: | |
| /* scan arbitrary characters (sets NOSKIP) */ | |
| if (width == 0) | |
| width = 1; | |
| if (flags & LONG) { | |
| if (!(flags & SUPPRESS)) | |
| p = va_arg(ap, wchar_t *); | |
| n = 0; | |
| while (width-- != 0 && | |
| (wi = __fgetwc_unlock(fp)) != WEOF) { | |
| if (!(flags & SUPPRESS)) | |
| *p++ = (wchar_t)wi; | |
| n++; | |
| } | |
| if (n == 0) | |
| goto input_failure; | |
| nread += n; | |
| if (!(flags & SUPPRESS)) | |
| nassigned++; | |
| } else { | |
| if (!(flags & SUPPRESS)) | |
| mbp = va_arg(ap, char *); | |
| n = 0; | |
| mbs = initial; | |
| while (width != 0 && | |
| (wi = __fgetwc_unlock(fp)) != WEOF) { | |
| if (width >= MB_CUR_MAX && | |
| !(flags & SUPPRESS)) { | |
| nconv = wcrtomb(mbp, (wchar_t)wi, &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| } else { | |
| nconv = wcrtomb(mbbuf, (wchar_t)wi, | |
| &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| if (nconv > width) { | |
| ungetwc(wi, fp); | |
| break; | |
| } | |
| if (!(flags & SUPPRESS)) | |
| memcpy(mbp, mbbuf, | |
| nconv); | |
| } | |
| if (!(flags & SUPPRESS)) | |
| mbp += nconv; | |
| width -= nconv; | |
| n++; | |
| } | |
| if (n == 0) | |
| goto input_failure; | |
| nread += n; | |
| if (!(flags & SUPPRESS)) | |
| 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 & SUPPRESS) && (flags & LONG)) { | |
| n = 0; | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width-- != 0 && INCCL(wi)) | |
| n++; | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| if (n == 0) | |
| goto match_failure; | |
| } else if (flags & LONG) { | |
| p0 = p = va_arg(ap, wchar_t *); | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width-- != 0 && INCCL(wi)) | |
| *p++ = (wchar_t)wi; | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| n = p - p0; | |
| if (n == 0) | |
| goto match_failure; | |
| *p = 0; | |
| nassigned++; | |
| } else { | |
| if (!(flags & SUPPRESS)) | |
| mbp = va_arg(ap, char *); | |
| n = 0; | |
| mbs = initial; | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width != 0 && INCCL(wi)) { | |
| if (width >= MB_CUR_MAX && | |
| !(flags & SUPPRESS)) { | |
| nconv = wcrtomb(mbp, wi, &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| } else { | |
| nconv = wcrtomb(mbbuf, wi, | |
| &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| if (nconv > width) | |
| break; | |
| if (!(flags & SUPPRESS)) | |
| memcpy(mbp, mbbuf, | |
| nconv); | |
| } | |
| if (!(flags & SUPPRESS)) | |
| mbp += nconv; | |
| width -= nconv; | |
| n++; | |
| } | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| if (!(flags & SUPPRESS)) { | |
| *mbp = 0; | |
| nassigned++; | |
| } | |
| } | |
| nread += n; | |
| nconversions++; | |
| break; | |
| case CT_STRING: | |
| /* like CCL, but zero-length string OK, & no NOSKIP */ | |
| if (width == 0) | |
| width = (size_t)~0; | |
| if ((flags & SUPPRESS) && (flags & LONG)) { | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width-- != 0 && | |
| !iswspace(wi)) | |
| nread++; | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| } else if (flags & LONG) { | |
| p0 = p = va_arg(ap, wchar_t *); | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width-- != 0 && | |
| !iswspace(wi)) { | |
| *p++ = (wchar_t)wi; | |
| nread++; | |
| } | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| *p = '\0'; | |
| nassigned++; | |
| } else { | |
| if (!(flags & SUPPRESS)) | |
| mbp = va_arg(ap, char *); | |
| mbs = initial; | |
| while ((wi = __fgetwc_unlock(fp)) != WEOF && | |
| width != 0 && | |
| !iswspace(wi)) { | |
| if (width >= MB_CUR_MAX && | |
| !(flags & SUPPRESS)) { | |
| nconv = wcrtomb(mbp, wi, &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| } else { | |
| nconv = wcrtomb(mbbuf, wi, | |
| &mbs); | |
| if (nconv == (size_t)-1) | |
| goto input_failure; | |
| if (nconv > width) | |
| break; | |
| if (!(flags & SUPPRESS)) | |
| memcpy(mbp, mbbuf, | |
| nconv); | |
| } | |
| if (!(flags & SUPPRESS)) | |
| mbp += nconv; | |
| width -= nconv; | |
| nread++; | |
| } | |
| if (wi != WEOF) | |
| ungetwc(wi, fp); | |
| if (!(flags & SUPPRESS)) { | |
| *mbp = 0; | |
| nassigned++; | |
| } | |
| } | |
| nconversions++; | |
| continue; | |
| case CT_INT: | |
| /* scan an integer as if by the conversion function */ | |
| if (width == 0 || width > sizeof(buf) / | |
| sizeof(*buf) - 1) | |
| width = sizeof(buf) / sizeof(*buf) - 1; | |
| flags |= SIGNOK | NDIGITS | NZDIGITS; | |
| for (p = buf; width; width--) { | |
| c = __fgetwc_unlock(fp); | |
| /* | |
| * 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. | |
| */ | |
| if (c != WEOF) | |
| ungetwc(c, fp); | |
| break; | |
| ok: | |
| /* | |
| * c is legal: store it and look at the next. | |
| */ | |
| *p++ = (wchar_t)c; | |
| } | |
| /* | |
| * 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) | |
| ungetwc(*--p, fp); | |
| goto match_failure; | |
| } | |
| c = p[-1]; | |
| if (c == 'x' || c == 'X') { | |
| --p; | |
| ungetwc(c, fp); | |
| } | |
| if ((flags & SUPPRESS) == 0) { | |
| uintmax_t res; | |
| *p = 0; | |
| if ((flags & UNSIGNED) == 0) | |
| res = wcstoimax(buf, NULL, base); | |
| else | |
| res = wcstoumax(buf, NULL, base); | |
| if (flags & POINTER) { | |
| *va_arg(ap, void **) = (void *)res; | |
| } | |
| else if (flags & SHORTSHORT) { | |
| *va_arg(ap, char *) = (char)res; | |
| } | |
| else if (flags & SHORT) { | |
| *va_arg(ap, short *) = (short)res; | |
| } | |
| else if (flags & LONG) { | |
| *va_arg(ap, long *) = (long)res; | |
| } | |
| else if (flags & LONGLONG) { | |
| *va_arg(ap, INT64 *) = res; // was quad_t | |
| } | |
| else if (flags & INTMAXT) { | |
| *va_arg(ap, intmax_t *) = res; | |
| } | |
| else if (flags & PTRDIFFT) { | |
| *va_arg(ap, ptrdiff_t *) = (ptrdiff_t)res; | |
| } | |
| else if (flags & SIZET) { | |
| *va_arg(ap, size_t *) = (size_t)res; | |
| } | |
| else { | |
| *va_arg(ap, int *) = (int)res; | |
| } | |
| nassigned++; | |
| } | |
| nread += p - buf; | |
| nconversions++; | |
| break; | |
| #ifndef NO_FLOATING_POINT | |
| case CT_FLOAT: | |
| /* scan a floating point number as if by strtod */ | |
| if (width == 0 || width > sizeof(buf) / | |
| sizeof(*buf) - 1) | |
| width = sizeof(buf) / sizeof(*buf) - 1; | |
| if ((width = parsefloat(fp, buf, buf + width)) == 0) | |
| goto match_failure; | |
| if ((flags & SUPPRESS) == 0) { | |
| #ifdef REAL_LONG_DOUBLE_SUPPORT | |
| if (flags & LONGDBL) { | |
| long double res = wcstold(buf, &p); | |
| *va_arg(ap, long double *) = res; | |
| } else | |
| #endif | |
| if (flags & (LONG | LONGDBL)) { | |
| double res = wcstod(buf, &p); | |
| *va_arg(ap, double *) = res; | |
| } | |
| else { | |
| float res = wcstof(buf, &p); | |
| *va_arg(ap, float *) = res; | |
| } | |
| #ifdef DEBUG | |
| if (p - buf != width) | |
| abort(); | |
| #endif | |
| nassigned++; | |
| } | |
| nread += (int)width; | |
| nconversions++; | |
| break; | |
| #endif /* !NO_FLOATING_POINT */ | |
| } | |
| } | |
| input_failure: | |
| return (nconversions != 0 ? nassigned : EOF); | |
| match_failure: | |
| return (nassigned); | |
| } | |
| #ifndef NO_FLOATING_POINT | |
| static int | |
| parsefloat(FILE *fp, wchar_t *buf, wchar_t *end) | |
| { | |
| wchar_t *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; | |
| wchar_t c; | |
| wchar_t decpt = (wchar_t)(unsigned char)*localeconv()->decimal_point; | |
| int gotmantdig = 0, ishex = 0; | |
| /* | |
| * 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; | |
| c = (wchar_t)WEOF; | |
| for (p = buf; p < end; ) { | |
| if ((wint_t)(c = __fgetwc_unlock(fp)) == WEOF) | |
| break; | |
| 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 (!iswalnum(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 && iswxdigit(c)) || iswdigit(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 && iswxdigit(c)) || iswdigit(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 (iswdigit(c)) | |
| commit = p; | |
| else | |
| goto parsedone; | |
| break; | |
| default: | |
| abort(); | |
| } | |
| *p++ = c; | |
| c = (wchar_t)WEOF; | |
| } | |
| parsedone: | |
| if ((wint_t)c != WEOF) | |
| ungetwc(c, fp); | |
| while (commit < --p) | |
| ungetwc(*p, fp); | |
| *++commit = '\0'; | |
| return (commit - buf); | |
| } | |
| #endif |