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-rw-r--r--lib/libc/stdio/vfscanf.c1094
1 files changed, 1094 insertions, 0 deletions
diff --git a/lib/libc/stdio/vfscanf.c b/lib/libc/stdio/vfscanf.c
new file mode 100644
index 0000000..8f9d3d0
--- /dev/null
+++ b/lib/libc/stdio/vfscanf.c
@@ -0,0 +1,1094 @@
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#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 <wchar.h>
+#include <wctype.h>
+#include "un-namespace.h"
+
+#include "collate.h"
+#include "libc_private.h"
+#include "local.h"
+#include "xlocale_private.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 */
+
+static const u_char *__sccl(char *, const u_char *);
+#ifndef NO_FLOATING_POINT
+static int parsefloat(FILE *, char *, char *, locale_t);
+#endif
+
+__weak_reference(__vfscanf, vfscanf);
+
+/*
+ * Conversion functions are passed a pointer to this object instead of
+ * a real parameter to indicate that the assignment-suppression (*)
+ * flag was specified. We could use a NULL pointer to indicate this,
+ * but that would mask bugs in applications that call scanf() with a
+ * NULL pointer.
+ */
+static const int suppress;
+#define SUPPRESS_PTR ((void *)&suppress)
+
+static const mbstate_t initial_mbs;
+
+/*
+ * The following conversion functions return the number of characters consumed,
+ * or -1 on input failure. Character class conversion returns 0 on match
+ * failure.
+ */
+
+static __inline int
+convert_char(FILE *fp, char * p, int width)
+{
+ int n;
+
+ if (p == SUPPRESS_PTR) {
+ size_t sum = 0;
+ for (;;) {
+ if ((n = fp->_r) < width) {
+ sum += n;
+ width -= n;
+ fp->_p += n;
+ if (__srefill(fp)) {
+ if (sum == 0)
+ return (-1);
+ break;
+ }
+ } else {
+ sum += width;
+ fp->_r -= width;
+ fp->_p += width;
+ break;
+ }
+ }
+ return (sum);
+ } else {
+ size_t r = __fread(p, 1, width, fp);
+
+ if (r == 0)
+ return (-1);
+ return (r);
+ }
+}
+
+static __inline int
+convert_wchar(FILE *fp, wchar_t *wcp, int width, locale_t locale)
+{
+ mbstate_t mbs;
+ int n, nread;
+ wint_t wi;
+
+ mbs = initial_mbs;
+ n = 0;
+ while (width-- != 0 &&
+ (wi = __fgetwc_mbs(fp, &mbs, &nread, locale)) != WEOF) {
+ if (wcp != SUPPRESS_PTR)
+ *wcp++ = (wchar_t)wi;
+ n += nread;
+ }
+ if (n == 0)
+ return (-1);
+ return (n);
+}
+
+static __inline int
+convert_ccl(FILE *fp, char * p, int width, const char *ccltab)
+{
+ char *p0;
+ int n;
+
+ if (p == SUPPRESS_PTR) {
+ n = 0;
+ while (ccltab[*fp->_p]) {
+ n++, fp->_r--, fp->_p++;
+ if (--width == 0)
+ break;
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (n == 0)
+ return (-1);
+ break;
+ }
+ }
+ } else {
+ p0 = p;
+ while (ccltab[*fp->_p]) {
+ fp->_r--;
+ *p++ = *fp->_p++;
+ if (--width == 0)
+ break;
+ if (fp->_r <= 0 && __srefill(fp)) {
+ if (p == p0)
+ return (-1);
+ break;
+ }
+ }
+ n = p - p0;
+ if (n == 0)
+ return (0);
+ *p = 0;
+ }
+ return (n);
+}
+
+static __inline int
+convert_wccl(FILE *fp, wchar_t *wcp, int width, const char *ccltab,
+ locale_t locale)
+{
+ mbstate_t mbs;
+ wint_t wi;
+ int n, nread;
+
+ mbs = initial_mbs;
+ n = 0;
+ if (wcp == SUPPRESS_PTR) {
+ while ((wi = __fgetwc_mbs(fp, &mbs, &nread, locale)) != WEOF &&
+ width-- != 0 && ccltab[wctob(wi)])
+ n += nread;
+ if (wi != WEOF)
+ __ungetwc(wi, fp, __get_locale());
+ } else {
+ while ((wi = __fgetwc_mbs(fp, &mbs, &nread, locale)) != WEOF &&
+ width-- != 0 && ccltab[wctob(wi)]) {
+ *wcp++ = (wchar_t)wi;
+ n += nread;
+ }
+ if (wi != WEOF)
+ __ungetwc(wi, fp, __get_locale());
+ if (n == 0)
+ return (0);
+ *wcp = 0;
+ }
+ return (n);
+}
+
+static __inline int
+convert_string(FILE *fp, char * p, int width)
+{
+ char *p0;
+ int n;
+
+ if (p == SUPPRESS_PTR) {
+ n = 0;
+ while (!isspace(*fp->_p)) {
+ n++, fp->_r--, fp->_p++;
+ if (--width == 0)
+ break;
+ if (fp->_r <= 0 && __srefill(fp))
+ break;
+ }
+ } else {
+ p0 = p;
+ while (!isspace(*fp->_p)) {
+ fp->_r--;
+ *p++ = *fp->_p++;
+ if (--width == 0)
+ break;
+ if (fp->_r <= 0 && __srefill(fp))
+ break;
+ }
+ *p = 0;
+ n = p - p0;
+ }
+ return (n);
+}
+
+static __inline int
+convert_wstring(FILE *fp, wchar_t *wcp, int width, locale_t locale)
+{
+ mbstate_t mbs;
+ wint_t wi;
+ int n, nread;
+
+ mbs = initial_mbs;
+ n = 0;
+ if (wcp == SUPPRESS_PTR) {
+ while ((wi = __fgetwc_mbs(fp, &mbs, &nread, locale)) != WEOF &&
+ width-- != 0 && !iswspace(wi))
+ n += nread;
+ if (wi != WEOF)
+ __ungetwc(wi, fp, __get_locale());
+ } else {
+ while ((wi = __fgetwc_mbs(fp, &mbs, &nread, locale)) != WEOF &&
+ width-- != 0 && !iswspace(wi)) {
+ *wcp++ = (wchar_t)wi;
+ n += nread;
+ }
+ if (wi != WEOF)
+ __ungetwc(wi, fp, __get_locale());
+ *wcp = '\0';
+ }
+ return (n);
+}
+
+/*
+ * Read an integer, storing it in buf. The only relevant bit in the
+ * flags argument is PFXOK.
+ *
+ * Return 0 on a match failure, and the number of characters read
+ * otherwise.
+ */
+static __inline int
+parseint(FILE *fp, char * __restrict buf, int width, int base, int flags)
+{
+ /* `basefix' is used to avoid `if' tests */
+ static const short basefix[17] =
+ { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
+ char *p;
+ int c;
+
+ 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++ = 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);
+ return (0);
+ }
+ c = ((u_char *)p)[-1];
+ if (c == 'x' || c == 'X') {
+ --p;
+ (void) __ungetc(c, fp);
+ }
+ return (p - buf);
+}
+
+/*
+ * __vfscanf - MT-safe version
+ */
+int
+__vfscanf(FILE *fp, char const *fmt0, va_list ap)
+{
+ int ret;
+
+ FLOCKFILE(fp);
+ ret = __svfscanf(fp, __get_locale(), fmt0, ap);
+ FUNLOCKFILE(fp);
+ return (ret);
+}
+int
+vfscanf_l(FILE *fp, locale_t locale, char const *fmt0, va_list ap)
+{
+ int ret;
+ FIX_LOCALE(locale);
+
+ FLOCKFILE(fp);
+ ret = __svfscanf(fp, locale, fmt0, ap);
+ FUNLOCKFILE(fp);
+ return (ret);
+}
+
+/*
+ * __svfscanf - non-MT-safe version of __vfscanf
+ */
+int
+__svfscanf(FILE *fp, locale_t locale, const char *fmt0, va_list ap)
+{
+#define GETARG(type) ((flags & SUPPRESS) ? SUPPRESS_PTR : va_arg(ap, type))
+ const u_char *fmt = (const u_char *)fmt0;
+ int c; /* character from format, or conversion */
+ size_t width; /* field width, or 0 */
+ int flags; /* flags as defined above */
+ int nassigned; /* number of fields assigned */
+ int nconversions; /* number of conversions */
+ int nr; /* characters read by the current conversion */
+ int nread; /* number of characters consumed from fp */
+ int base; /* base argument to conversion function */
+ char ccltab[256]; /* character class table for %[...] */
+ char buf[BUF]; /* buffer for numeric conversions */
+
+ ORIENT(fp, -1);
+
+ nassigned = 0;
+ nconversions = 0;
+ nread = 0;
+ for (;;) {
+ c = *fmt++;
+ if (c == 0)
+ return (nassigned);
+ if (isspace(c)) {
+ while ((fp->_r > 0 || __srefill(fp) == 0) && isspace(*fp->_p))
+ nread++, fp->_r--, fp->_p++;
+ 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 (fp->_r <= 0 && __srefill(fp))
+ goto input_failure;
+ if (*fp->_p != c)
+ goto match_failure;
+ fp->_r--, fp->_p++;
+ 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 '[':
+ fmt = __sccl(ccltab, 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;
+ if (flags & SHORTSHORT)
+ *va_arg(ap, char *) = nread;
+ else if (flags & SHORT)
+ *va_arg(ap, short *) = nread;
+ else if (flags & LONG)
+ *va_arg(ap, long *) = nread;
+ else if (flags & LONGLONG)
+ *va_arg(ap, long long *) = nread;
+ else if (flags & INTMAXT)
+ *va_arg(ap, intmax_t *) = nread;
+ else if (flags & SIZET)
+ *va_arg(ap, size_t *) = nread;
+ else if (flags & PTRDIFFT)
+ *va_arg(ap, ptrdiff_t *) = nread;
+ else
+ *va_arg(ap, int *) = nread;
+ continue;
+
+ default:
+ goto match_failure;
+
+ /*
+ * Disgusting backwards compatibility hack. XXX
+ */
+ case '\0': /* compat */
+ return (EOF);
+ }
+
+ /*
+ * We have a conversion that requires input.
+ */
+ if (fp->_r <= 0 && __srefill(fp))
+ 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))
+ 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.
+ */
+ switch (c) {
+
+ case CT_CHAR:
+ /* scan arbitrary characters (sets NOSKIP) */
+ if (width == 0)
+ width = 1;
+ if (flags & LONG) {
+ nr = convert_wchar(fp, GETARG(wchar_t *),
+ width, locale);
+ } else {
+ nr = convert_char(fp, GETARG(char *), width);
+ }
+ if (nr < 0)
+ goto input_failure;
+ break;
+
+ case CT_CCL:
+ /* scan a (nonempty) character class (sets NOSKIP) */
+ if (width == 0)
+ width = (size_t)~0; /* `infinity' */
+ if (flags & LONG) {
+ nr = convert_wccl(fp, GETARG(wchar_t *), width,
+ ccltab, locale);
+ } else {
+ nr = convert_ccl(fp, GETARG(char *), width,
+ ccltab);
+ }
+ if (nr <= 0) {
+ if (nr < 0)
+ goto input_failure;
+ else /* nr == 0 */
+ goto match_failure;
+ }
+ break;
+
+ case CT_STRING:
+ /* like CCL, but zero-length string OK, & no NOSKIP */
+ if (width == 0)
+ width = (size_t)~0;
+ if (flags & LONG) {
+ nr = convert_wstring(fp, GETARG(wchar_t *),
+ width, locale);
+ } else {
+ nr = convert_string(fp, GETARG(char *), width);
+ }
+ if (nr < 0)
+ goto input_failure;
+ break;
+
+ case CT_INT:
+ /* 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
+ nr = parseint(fp, buf, width, base, flags);
+ if (nr == 0)
+ goto match_failure;
+ if ((flags & SUPPRESS) == 0) {
+ uintmax_t res;
+
+ buf[nr] = '\0';
+ if ((flags & UNSIGNED) == 0)
+ res = strtoimax_l(buf, (char **)NULL, base, locale);
+ else
+ res = strtoumax_l(buf, (char **)NULL, base, locale);
+ 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;
+ }
+ 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;
+ nr = parsefloat(fp, buf, buf + width, locale);
+ if (nr == 0)
+ goto match_failure;
+ if ((flags & SUPPRESS) == 0) {
+ if (flags & LONGDBL) {
+ long double res = strtold_l(buf, NULL,
+ locale);
+ *va_arg(ap, long double *) = res;
+ } else if (flags & LONG) {
+ double res = strtod_l(buf, NULL,
+ locale);
+ *va_arg(ap, double *) = res;
+ } else {
+ float res = strtof_l(buf, NULL, locale);
+ *va_arg(ap, float *) = res;
+ }
+ }
+ break;
+#endif /* !NO_FLOATING_POINT */
+ }
+ if (!(flags & SUPPRESS))
+ nassigned++;
+ nread += nr;
+ nconversions++;
+ }
+input_failure:
+ 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(tab, fmt)
+ char *tab;
+ const u_char *fmt;
+{
+ int c, n, v, i;
+ struct xlocale_collate *table =
+ (struct xlocale_collate*)__get_locale()->components[XLC_COLLATE];
+
+ /* 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] = 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 == ']'
+ || (table->__collate_load_error ? n < c :
+ __collate_range_cmp (table, n, c) < 0
+ )
+ ) {
+ c = '-';
+ break; /* resume the for(;;) */
+ }
+ fmt++;
+ /* fill in the range */
+ if (table->__collate_load_error) {
+ do {
+ tab[++c] = v;
+ } while (c < n);
+ } else {
+ for (i = 0; i < 256; i ++)
+ if ( __collate_range_cmp (table, c, i) < 0
+ && __collate_range_cmp (table, i, n) <= 0
+ )
+ tab[i] = 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
+ break;
+
+ 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, locale_t locale)
+{
+ char *commit, *p;
+ int infnanpos = 0, decptpos = 0;
+ enum {
+ S_START, S_GOTSIGN, S_INF, S_NAN, S_DONE, S_MAYBEHEX,
+ S_DIGITS, S_DECPT, S_FRAC, S_EXP, S_EXPDIGITS
+ } state = S_START;
+ unsigned char c;
+ const char *decpt = localeconv_l(locale)->decimal_point;
+ _Bool 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;
+ 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 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 (!isalnum(c) && 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 && isxdigit(c)) || isdigit(c)) {
+ gotmantdig = 1;
+ commit = p;
+ break;
+ } else {
+ state = S_DECPT;
+ goto reswitch;
+ }
+ case S_DECPT:
+ if (c == decpt[decptpos]) {
+ if (decpt[++decptpos] == '\0') {
+ /* We read the complete decpt seq. */
+ state = S_FRAC;
+ if (gotmantdig)
+ commit = p;
+ }
+ break;
+ } else if (!decptpos) {
+ /* We didn't read any decpt characters. */
+ state = S_FRAC;
+ goto reswitch;
+ } else {
+ /*
+ * We read part of a multibyte decimal point,
+ * but the rest is invalid, so bail.
+ */
+ goto parsedone;
+ }
+ 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)
+ __ungetc(*(u_char *)p, fp);
+ *++commit = '\0';
+ return (commit - buf);
+}
+#endif
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