diff options
Diffstat (limited to 'lib/libc/stdio/vfwscanf.c')
| -rw-r--r-- | lib/libc/stdio/vfwscanf.c | 880 |
1 files changed, 0 insertions, 880 deletions
diff --git a/lib/libc/stdio/vfwscanf.c b/lib/libc/stdio/vfwscanf.c deleted file mode 100644 index 60c7c71..0000000 --- a/lib/libc/stdio/vfwscanf.c +++ /dev/null @@ -1,880 +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("$FreeBSD$"); - -#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 *, wchar_t *); -#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, fmt, ap); - FUNLOCKFILE(fp); - return (ret); -} - -/* - * Non-MT-safe version. - */ -int -__vfwscanf(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; /* 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; - - /* `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 = ccle = NULL; - for (;;) { - c = *fmt++; - if (c == 0) - return (nassigned); - if (iswspace(c)) { - while ((c = __fgetwc(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(fp)) == WEOF) - goto input_failure; - if (wi != c) { - __ungetwc(wi, fp); - goto input_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 *) = 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); - } - - /* - * Consume leading white space, except for formats - * that suppress this. - */ - if ((flags & NOSKIP) == 0) { - while ((wi = __fgetwc(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(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_mbs; - while (width != 0 && - (wi = __fgetwc(fp)) != WEOF) { - 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) { - __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(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(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_mbs; - while ((wi = __fgetwc(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(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(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_mbs; - while ((wi = __fgetwc(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(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 *)(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; - 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) { - if (flags & LONGDBL) { - long double res = wcstold(buf, &p); - *va_arg(ap, long double *) = res; - } else if (flags & LONG) { - double res = wcstod(buf, &p); - *va_arg(ap, double *) = res; - } else { - float res = wcstof(buf, &p); - *va_arg(ap, float *) = res; - } - nassigned++; - } - nread += 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) -{ - 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; - - mbs = initial_mbs; - nconv = mbrtowc(&decpt, localeconv()->decimal_point, MB_CUR_MAX, &mbs); - if (nconv == (size_t)-1 || nconv == (size_t)-2) - decpt = '.'; /* failsafe */ - - /* - * 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 = WEOF; - for (p = buf; p < end; ) { - if ((c = __fgetwc(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 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(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 && 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 = WEOF; - } - -parsedone: - if (c != WEOF) - __ungetwc(c, fp); - while (commit < --p) - __ungetwc(*p, fp); - *++commit = '\0'; - return (commit - buf); -} -#endif |
