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--- Libc/Libc-1725.40.4/stdio/FreeBSD/vfwscanf.c
+++ /dev/null
@@ -1,950 +0,0 @@
-/*-
- * 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.
- * 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.
- */
-
-#if 0
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93";
-#endif /* LIBC_SCCS and not lint */
-#endif
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdio/vfwscanf.c,v 1.17 2009/01/19 06:19:51 das Exp $");
-
-#include "xlocale_private.h"
-
-#include "namespace.h"
-#include <ctype.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <stdarg.h>
-#include <string.h>
-#include <wchar.h>
-#include <wctype.h>
-#include "un-namespace.h"
-
-#include "libc_private.h"
-#include "local.h"
-
-#ifndef NO_FLOATING_POINT
-#include <locale.h>
-#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: long long (+ 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 */
-
-#ifndef NO_FLOATING_POINT
-static int parsefloat(FILE *, wchar_t **, size_t, locale_t loc);
-#endif
-
-#define INCCL(_c) \
- (cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \
- (wmemchr(ccls, (_c), ccle - ccls) != NULL))
-
-static const mbstate_t initial_mbs;
-
-/*
- * MT-safe version.
- */
-int
-vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
-{
- int ret;
-
- FLOCKFILE(fp);
- ORIENT(fp, 1);
- ret = __vfwscanf(fp, __current_locale(), fmt, ap);
- FUNLOCKFILE(fp);
- return (ret);
-}
-
-int
-vfwscanf_l(FILE * __restrict fp, locale_t loc, const wchar_t * __restrict fmt,
- va_list ap)
-{
- int ret;
-
- NORMALIZE_LOCALE(loc);
- FLOCKFILE(fp);
- ORIENT(fp, 1);
- ret = __vfwscanf(fp, loc, fmt, ap);
- FUNLOCKFILE(fp);
- return (ret);
-}
-
-/*
- * Non-MT-safe version.
- */
-__private_extern__ int
-__vfwscanf(FILE * __restrict fp, locale_t loc, 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; /* 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 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 */
- int index; /* for %index$ */
- va_list ap_orig; /* to reset ap to first argument */
- mbstate_t mbs;
- int mb_cur_max = MB_CUR_MAX_L(loc);
-
- /* `basefix' is used to avoid `if' tests in the integer scanner */
- static const short basefix[17] =
- { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
-
- nassigned = 0;
- nread = 0;
- ccls = ccle = NULL;
- va_copy(ap_orig, ap);
- for (;;) {
- c = *fmt++;
- if (c == 0)
- return (nassigned);
- if (iswspace_l(c, loc)) {
- while ((c = __fgetwc(fp, loc)) != WEOF &&
- iswspace_l(c, loc))
- nread++;
- if (c != WEOF)
- __ungetwc(c, fp, loc);
- continue;
- }
- if (c != '%') {
- if ((wi = __fgetwc(fp, loc)) == WEOF)
- goto input_failure;
- 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 '%':
- /* Consume leading white space */
- for(;;) {
- if ((wi = __fgetwc(fp, loc)) == WEOF)
- goto input_failure;
- if (!iswspace_l(wi, loc))
- break;
- nread++;
- }
-literal:
- if (wi != c) {
- __ungetwc(wi, fp, loc);
- goto match_failure;
- }
- nread++;
- continue;
-
- case '$':
- index = width;
- if (index < 1 || index > NL_ARGMAX || fmt[-3] != '%') {
- goto input_failure;
- }
- width = 0;
- va_end(ap);
- va_copy(ap, ap_orig); /* reset to %1$ */
- for (; index > 1; index--) {
- va_arg(ap, void*);
- }
- goto again;
- 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':
- {
- if (flags & SUPPRESS) /* ??? */
- continue;
- void *ptr = va_arg(ap, void *);
- if (ptr == NULL)
- continue;
- else if (flags & SHORTSHORT)
- *(char *)ptr = nread;
- else if (flags & SHORT)
- *(short *)ptr = nread;
- else if (flags & LONG)
- *(long *)ptr = nread;
- else if (flags & LONGLONG)
- *(long long *)ptr = nread;
- else if (flags & INTMAXT)
- *(intmax_t *)ptr = nread;
- else if (flags & SIZET)
- *(size_t *)ptr = nread;
- else if (flags & PTRDIFFT)
- *(ptrdiff_t *)ptr = nread;
- else
- *(int *)ptr = 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(fp, loc)) != WEOF && iswspace_l(wi, loc))
- nread++;
- if (wi == WEOF)
- goto input_failure;
- __ungetwc(wi, fp, loc);
- }
-
- /*
- * 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(fp, loc)) != 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_mbs;
- while (width != 0 &&
- (wi = __fgetwc(fp, loc)) != WEOF) {
- if (width >= mb_cur_max &&
- !(flags & SUPPRESS)) {
- nconv = wcrtomb_l(mbp, wi, &mbs, loc);
- if (nconv == (size_t)-1)
- goto input_failure;
- } else {
- nconv = wcrtomb_l(mbbuf, wi,
- &mbs, loc);
- if (nconv == (size_t)-1)
- goto input_failure;
- if (nconv > width) {
- __ungetwc(wi, fp, loc);
- 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++;
- }
- 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(fp, loc)) != WEOF &&
- width-- != 0 && INCCL(wi))
- n++;
- if (wi != WEOF)
- __ungetwc(wi, fp, loc);
- if (n == 0)
- goto match_failure;
- } else if (flags & LONG) {
- p0 = p = va_arg(ap, wchar_t *);
- while ((wi = __fgetwc(fp, loc)) != WEOF &&
- width-- != 0 && INCCL(wi))
- *p++ = (wchar_t)wi;
- if (wi != WEOF)
- __ungetwc(wi, fp, loc);
- 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_mbs;
- while ((wi = __fgetwc(fp, loc)) != WEOF &&
- width != 0 && INCCL(wi)) {
- if (width >= mb_cur_max &&
- !(flags & SUPPRESS)) {
- nconv = wcrtomb_l(mbp, wi, &mbs, loc);
- if (nconv == (size_t)-1)
- goto input_failure;
- } else {
- nconv = wcrtomb_l(mbbuf, wi,
- &mbs, loc);
- 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, loc);
- else if (wi == WEOF && nassigned == 0)
- goto eof_failure;
- if (n == 0)
- goto match_failure;
- if (!(flags & SUPPRESS)) {
- *mbp = 0;
- nassigned++;
- }
- }
- nread += n;
- 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(fp, loc)) != WEOF &&
- width-- != 0 &&
- !iswspace_l(wi, loc))
- nread++;
- if (wi != WEOF)
- __ungetwc(wi, fp, loc);
- } else if (flags & LONG) {
- p0 = p = va_arg(ap, wchar_t *);
- while ((wi = __fgetwc(fp, loc)) != WEOF &&
- width-- != 0 &&
- !iswspace_l(wi, loc)) {
- *p++ = (wchar_t)wi;
- nread++;
- }
- if (wi != WEOF)
- __ungetwc(wi, fp, loc);
- *p = '\0';
- nassigned++;
- } else {
- if (!(flags & SUPPRESS))
- mbp = va_arg(ap, char *);
- mbs = initial_mbs;
- while ((wi = __fgetwc(fp, loc)) != WEOF &&
- width != 0 &&
- !iswspace_l(wi, loc)) {
- if (width >= mb_cur_max &&
- !(flags & SUPPRESS)) {
- nconv = wcrtomb_l(mbp, wi, &mbs, loc);
- if (nconv == (size_t)-1)
- goto input_failure;
- } else {
- nconv = wcrtomb_l(mbbuf, wi,
- &mbs, loc);
- 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, loc);
- if (!(flags & SUPPRESS)) {
- *mbp = 0;
- nassigned++;
- }
- }
- 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(fp, loc);
- /*
- * 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, loc);
- 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, loc);
- goto match_failure;
- }
- c = p[-1];
- if (c == 'x' || c == 'X') {
- --p;
- __ungetwc(c, fp, loc);
- }
- if ((flags & SUPPRESS) == 0) {
- uintmax_t res;
-
- *p = 0;
- if ((flags & UNSIGNED) == 0)
- res = wcstoimax_l(buf, NULL, base, loc);
- else
- res = wcstoumax_l(buf, NULL, base, loc);
- if (flags & POINTER)
- *va_arg(ap, void **) =
- (void *)(uintptr_t)res;
- else if (flags & SHORTSHORT)
- *va_arg(ap, char *) = res;
- else if (flags & SHORT)
- *va_arg(ap, short *) = res;
- else if (flags & LONG)
- *va_arg(ap, long *) = res;
- else if (flags & LONGLONG)
- *va_arg(ap, long long *) = res;
- else if (flags & INTMAXT)
- *va_arg(ap, intmax_t *) = res;
- else if (flags & PTRDIFFT)
- *va_arg(ap, ptrdiff_t *) = res;
- else if (flags & SIZET)
- *va_arg(ap, size_t *) = res;
- else
- *va_arg(ap, int *) = res;
- nassigned++;
- }
- nread += p - buf;
- break;
-
-#ifndef NO_FLOATING_POINT
- case CT_FLOAT:
- {
- wchar_t *pbuf;
- /* scan a floating point number as if by strtod */
- if ((width = parsefloat(fp, &pbuf, width, loc)) == 0)
- goto match_failure;
- if ((flags & SUPPRESS) == 0) {
- if (flags & LONGDBL) {
- long double res = wcstold_l(pbuf, &p, loc);
- *va_arg(ap, long double *) = res;
- } else if (flags & LONG) {
- double res = wcstod_l(pbuf, &p, loc);
- *va_arg(ap, double *) = res;
- } else {
- float res = wcstof_l(pbuf, &p, loc);
- *va_arg(ap, float *) = res;
- }
- nassigned++;
- }
- nread += width;
- break;
- }
-#endif /* !NO_FLOATING_POINT */
- }
- }
-input_failure:
- return (nassigned ? nassigned : EOF);
-match_failure:
- return (nassigned);
-eof_failure:
- return EOF;
-}
-
-#ifndef NO_FLOATING_POINT
-extern char *__parsefloat_buf(size_t s); /* see vfscanf-fbsd.c */
-
-static int
-parsefloat(FILE *fp, wchar_t **buf, size_t width, locale_t loc)
-{
- mbstate_t mbs;
- size_t nconv;
- wchar_t *commit, *p;
- int infnanpos = 0;
- enum {
- S_START, S_GOTSIGN, S_INF, S_NAN, S_DONE, S_MAYBEHEX,
- S_DIGITS, S_FRAC, S_EXP, S_EXPDIGITS
- } state = S_START;
- wchar_t c;
- wchar_t decpt;
- _Bool gotmantdig = 0, ishex = 0;
- wchar_t *b;
- wchar_t *e;
- size_t s;
-
- mbs = initial_mbs;
-
- nconv = mbrtowc_l(&decpt, localeconv()->decimal_point, MB_CUR_MAX_L(loc), &mbs, loc);
- if (nconv == (size_t)-1 || nconv == (size_t)-2)
- decpt = '.'; /* failsafe */
-
- s = (width == 0 ? BUF : (width + 1));
- if ((b = (wchar_t *)__parsefloat_buf(s * sizeof(wchar_t))) == NULL) {
- *buf = NULL;
- return 0;
- }
- e = b + (s - 1);
- /*
- * 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 = b - 1;
- c = WEOF;
- for (p = b; width == 0 || p < e; ) {
- if ((c = __fgetwc(fp, loc)) == 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 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;
- state = S_DONE;
- } else if (!iswalnum_l(c, loc) && c != '_')
- goto parsedone;
- break;
- }
- infnanpos++;
- break;
- case S_DONE:
- goto parsedone;
- 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_l(c, loc)) || iswdigit_l(c, loc))
- 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_l(c, loc)) || iswdigit_l(c, loc)) {
- 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_l(c, loc))
- commit = p;
- else
- goto parsedone;
- break;
- default:
- LIBC_ABORT("unknown state %d", state);
- }
- if (p >= e) {
- ssize_t diff = (p - b);
- ssize_t com = (commit - b);
- s += BUF;
- b = (wchar_t *)__parsefloat_buf(s * sizeof(wchar_t));
- if (b == NULL) {
- *buf = NULL;
- return 0;
- }
- e = b + (s - 1);
- p = b + diff;
- commit = b + com;
- }
- *p++ = c;
- c = WEOF;
- }
-
-parsedone:
- if (c != WEOF)
- __ungetwc(c, fp, loc);
- while (commit < --p)
- __ungetwc(*p, fp, loc);
- *++commit = '\0';
- *buf = b;
- return (commit - b);
-}
-#endif