From d0b85c158fbe7a30d665f41c60bb5800da562ce8 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Wed, 11 Mar 2009 11:53:22 +0000 Subject: * libc/include/wchar.h (fwscanf, swscanf, vfwscanf, vswscanf, vwscanf, wscanf): Declare. (_fwscanf_r, _swscanf_r, _vfwscanf_r, _vswscanf_r, _vwscanf_r, _wscanf_r): Declare. * libc/stdio/Makefile.am: Add new wscanf files. * libc/stdio/Makefile.in: Regenerate. * libc/stdio/fwscanf.c: New file. * libc/stdio/local.h (__svfwscanf_r, __ssvfwscanf_r, __svfiwscanf_r, __ssvfiwscanf_r): Declare. * libc/stdio/stdio.tex: Add new documentation references. * libc/stdio/swscanf.c: New file. * libc/stdio/vfwscanf.c: New file. * libc/stdio/vswscanf.c: New file. * libc/stdio/vwscanf.c: New file. * libc/stdio/wscanf.c: New file. * libc/stdio/vfscanf.c (_sungetc_r): Make externaly available. Only define if INTEGER_ONLY is defined. Declare otherwise. (__ssrefill_r): Ditto. (_sfread_r): Ditto. Remove static eofread/eofread1 functions and use __seofread function instead, throughout. * libc/stdio/local.h (__seofread): Declare. * libc/stdio/stdio.c (__seofread): Define. * libc/stdio/fgetwc.c (__fgetwc): Fix compiler warning. * libc/stdio/fgetws.c (_fgetws_r): Ditto. * libc/stdio/fread.c (_fread_r): Ditto. * libc/stdio/vfprintf.c: Ditto. * libc/stdio/vswprintf.c: Ditto. --- newlib/libc/stdio/vfwscanf.c | 1469 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1469 insertions(+) create mode 100644 newlib/libc/stdio/vfwscanf.c (limited to 'newlib/libc/stdio/vfwscanf.c') diff --git a/newlib/libc/stdio/vfwscanf.c b/newlib/libc/stdio/vfwscanf.c new file mode 100644 index 000000000..56df93247 --- /dev/null +++ b/newlib/libc/stdio/vfwscanf.c @@ -0,0 +1,1469 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* +FUNCTION +<>, <>, <>---scan and format argument list from wide character input + +INDEX + vfwscanf +INDEX + _vfwscanf +INDEX + vwscanf +INDEX + _vwscanf +INDEX + vswscanf +INDEX + _vswscanf + +ANSI_SYNOPSIS + #include + #include + int vwscanf(const wchar_t *<[fmt]>, va_list <[list]>); + int vfwscanf(FILE *<[fp]>, const wchar_t *<[fmt]>, va_list <[list]>); + int vswscanf(const wchar_t *<[str]>, const wchar_t *<[fmt]>, va_list <[list]>); + + int _vwscanf(struct _reent *<[reent]>, const wchar_t *<[fmt]>, + va_list <[list]>); + int _vfwscanf(struct _reent *<[reent]>, FILE *<[fp]>, const wchar_t *<[fmt]>, + va_list <[list]>); + int _vswscanf(struct _reent *<[reent]>, const wchar_t *<[str]>, + const wchar_t *<[fmt]>, va_list <[list]>); + +TRAD_SYNOPSIS + #include + #include + int vwscanf( <[fmt]>, <[ist]>) + wchar_t *<[fmt]>; + va_list <[list]>; + + int vfwscanf( <[fp]>, <[fmt]>, <[list]>) + FILE *<[fp]>; + wchar_t *<[fmt]>; + va_list <[list]>; + + int vswscanf( <[str]>, <[fmt]>, <[list]>) + wchar_t *<[str]>; + wchar_t *<[fmt]>; + va_list <[list]>; + + int _vwscanf( <[reent]>, <[fmt]>, <[ist]>) + struct _reent *<[reent]>; + wchar_t *<[fmt]>; + va_list <[list]>; + + int _vfwscanf( <[reent]>, <[fp]>, <[fmt]>, <[list]>) + struct _reent *<[reent]>; + FILE *<[fp]>; + wchar_t *<[fmt]>; + va_list <[list]>; + + int _vswscanf( <[reent]>, <[str]>, <[fmt]>, <[list]>) + struct _reent *<[reent]>; + wchar_t *<[str]>; + wchar_t *<[fmt]>; + va_list <[list]>; + +DESCRIPTION +<>, <>, and <> are (respectively) variants +of <>, <>, and <>. They differ only in +allowing their caller to pass the variable argument list as a +<> object (initialized by <>) rather than +directly accepting a variable number of arguments. + +RETURNS +The return values are consistent with the corresponding functions: +<> returns the number of input fields successfully scanned, +converted, and stored; the return value does not include scanned +fields which were not stored. + +If <> attempts to read at end-of-file, the return value +is <>. + +If no fields were stored, the return value is <<0>>. + +The routines <<_vwscanf>>, <<_vfwscanf>>, and <<_vswscanf>> are +reentrant versions which take an additional first parameter which points +to the reentrancy structure. + +PORTABILITY +C99, POSIX-1.2008 +*/ + +#include <_ansi.h> +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "local.h" + +#ifdef INTEGER_ONLY +#define VFWSCANF vfiwscanf +#define _VFWSCANF_R _vfiwscanf_r +#define __SVFWSCANF __svfiwscanf +#ifdef STRING_ONLY +# define __SVFWSCANF_R __ssvfiwscanf_r +#else +# define __SVFWSCANF_R __svfiwscanf_r +#endif +#else +#define VFWSCANF vfwscanf +#define _VFWSCANF_R _vfwscanf_r +#define __SVFWSCANF __svfwscanf +#ifdef STRING_ONLY +# define __SVFWSCANF_R __ssvfwscanf_r +#else +# define __SVFWSCANF_R __svfwscanf_r +#endif +#ifndef NO_FLOATING_POINT +#define FLOATING_POINT +#endif +#endif + +#ifdef STRING_ONLY +#undef _flockfile +#undef _funlockfile +#define _flockfile(x) {} +#define _funlockfile(x) {} +#define _ungetwc_r _sungetwc_r +#define __srefill_r __ssrefill_r +#define _fgetwc_r _sfgetwc_r +#endif + +#ifdef FLOATING_POINT +#include +#include + +/* Currently a test is made to see if long double processing is warranted. + This could be changed in the future should the _ldtoa_r code be + preferred over _dtoa_r. */ +#define _NO_LONGDBL +#if defined _WANT_IO_LONG_DOUBLE && (LDBL_MANT_DIG > DBL_MANT_DIG) +#undef _NO_LONGDBL +extern _LONG_DOUBLE _wcstold_r _PARAMS((wchar_t *s, wchar_t **sptr)); +#endif + +#include "floatio.h" + +#if ((MAXEXP+MAXFRACT+3) > MB_LEN_MAX) +# define BUF (MAXEXP+MAXFRACT+3) /* 3 = sign + decimal point + NUL */ +#else +# define BUF MB_LEN_MAX +#endif + +/* An upper bound for how long a long prints in decimal. 4 / 13 approximates + log (2). Add one char for roundoff compensation and one for the sign. */ +#define MAX_LONG_LEN ((CHAR_BIT * sizeof (long) - 1) * 4 / 13 + 2) +#else +#define BUF 40 +#endif + +#define _NO_LONGLONG +#if defined _WANT_IO_LONG_LONG \ + && (defined __GNUC__ || __STDC_VERSION__ >= 199901L) +# undef _NO_LONGLONG +#endif + +#define _NO_POS_ARGS +#ifdef _WANT_IO_POS_ARGS +# undef _NO_POS_ARGS +# ifdef NL_ARGMAX +# define MAX_POS_ARGS NL_ARGMAX +# else +# define MAX_POS_ARGS 32 +# endif + +static void * get_arg (int, va_list *, int *, void **); +#endif /* _WANT_IO_POS_ARGS */ + +/* + * Flags used during conversion. + */ + +#define LONG 0x01 /* l: long or double */ +#define LONGDBL 0x02 /* L/ll: long double or long long */ +#define SHORT 0x04 /* h: short */ +#define CHAR 0x08 /* hh: 8 bit integer */ +#define SUPPRESS 0x10 /* suppress assignment */ +#define POINTER 0x20 /* weird %p pointer (`fake hex') */ +#define NOSKIP 0x40 /* do not skip blanks */ + +/* + * The following are used in numeric conversions only: + * SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point; + * SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral. + */ + +#define SIGNOK 0x80 /* +/- is (still) legal */ +#define NDIGITS 0x100 /* no digits detected */ + +#define DPTOK 0x200 /* (float) decimal point is still legal */ +#define EXPOK 0x400 /* (float) exponent (e+3, etc) still legal */ + +#define PFXOK 0x200 /* 0x prefix is (still) legal */ +#define NZDIGITS 0x400 /* 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 /* integer, i.e., wcstol or wcstoul */ +#define CT_FLOAT 4 /* floating, i.e., wcstod */ + +#define INCCL(_c) \ + (cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \ + (wmemchr(ccls, (_c), ccle - ccls) != NULL)) + +/* + * vfwscanf + */ + +#ifndef STRING_ONLY + +#ifndef _REENT_ONLY + +int +_DEFUN(VFWSCANF, (fp, fmt, ap), + register FILE *fp _AND + _CONST wchar_t *fmt _AND + va_list ap) +{ + CHECK_INIT(_REENT, fp); + return __SVFWSCANF_R (_REENT, fp, fmt, ap); +} + +int +_DEFUN(__SVFWSCANF, (fp, fmt0, ap), + register FILE *fp _AND + wchar_t _CONST *fmt0 _AND + va_list ap) +{ + return __SVFWSCANF_R (_REENT, fp, fmt0, ap); +} + +#endif /* !_REENT_ONLY */ + +int +_DEFUN(_VFWSCANF_R, (data, fp, fmt, ap), + struct _reent *data _AND + register FILE *fp _AND + _CONST wchar_t *fmt _AND + va_list ap) +{ + CHECK_INIT(data, fp); + return __SVFWSCANF_R (data, fp, fmt, ap); +} +#endif /* !STRING_ONLY */ + +#ifdef STRING_ONLY +/* When dealing with the swscanf family, we don't want to use the + * regular ungetwc which will drag in file I/O items we don't need. + * So, we create our own trimmed-down version. */ +static wint_t +_DEFUN(_sungetwc_r, (data, fp, ch), + struct _reent *data _AND + wint_t wc _AND + register FILE *fp) +{ + if (wc == WEOF) + return (WEOF); + + /* After ungetc, we won't be at eof anymore */ + fp->_flags &= ~__SEOF; + + /* + * If we are in the middle of ungetwc'ing, just continue. + * This may require expanding the current ungetc buffer. + */ + + if (HASUB (fp)) + { + if (fp->_r >= fp->_ub._size && __submore (data, fp)) + { + return EOF; + } + fp->_p -= sizeof (wchar_t); + *fp->_p = (wchar_t) wc; + fp->_r += sizeof (wchar_t); + return wc; + } + + /* + * If we can handle this by simply backing up, do so, + * but never replace the original character. + * (This makes swscanf() work when scanning `const' data.) + */ + + if (fp->_bf._base != NULL && fp->_p > fp->_bf._base + && ((wchar_t *)fp->_p)[-1] == wc) + { + fp->_p -= sizeof (wchar_t); + fp->_r += sizeof (wchar_t); + return wc; + } + + /* + * Create an ungetc buffer. + * Initially, we will use the `reserve' buffer. + */ + + fp->_ur = fp->_r; + fp->_up = fp->_p; + fp->_ub._base = fp->_ubuf; + fp->_ub._size = sizeof (fp->_ubuf); + fp->_p = &fp->_ubuf[sizeof (fp->_ubuf) - sizeof (wchar_t)]; + *(wchar_t *) fp->_p = wc; + fp->_r = 2; + return wc; +} + +extern int __ssrefill_r _PARAMS ((struct _reent *ptr, register FILE * fp)); + +static size_t +_DEFUN(_sfgetwc_r, (ptr, fp), + struct _reent * ptr _AND + FILE * fp) +{ + wchar_t wc; + + if (fp->_r <= 0 && __ssrefill_r (ptr, fp)) + return (WEOF); + wc = *(wchar_t *) fp->_p; + fp->_p += sizeof (wchar_t); + fp->_r -= sizeof (wchar_t); + return (wc); +} +#endif /* STRING_ONLY */ + +int +_DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap), + struct _reent *rptr _AND + register FILE *fp _AND + wchar_t _CONST *fmt0 _AND + va_list ap) +{ + register wchar_t *fmt = (wchar_t *) fmt0; + register wint_t c; /* character from format, or conversion */ + register size_t width; /* field width, or 0 */ + register wchar_t *p = NULL; /* points into all kinds of strings */ + register int n; /* handy integer */ + register int flags; /* flags as defined above */ + register wchar_t *p0; /* saves original value of p when necessary */ + int nassigned; /* number of fields assigned */ + int nread; /* number of characters consumed from fp */ +#ifndef _NO_POS_ARGS + int N; /* arg number */ + int arg_index = 0; /* index into args processed directly */ + int numargs = 0; /* number of varargs read */ + void *args[MAX_POS_ARGS]; /* positional args read */ + int is_pos_arg; /* is current format positional? */ +#endif + int base = 0; /* base argument to wcstol/wcstoul */ + + mbstate_t mbs; /* value to keep track of multibyte state */ + + #define CCFN_PARAMS _PARAMS((struct _reent *, const wchar_t *, wchar_t **, int)) + unsigned long (*ccfn)CCFN_PARAMS=0; /* conversion function (wcstol/wcstoul) */ + wchar_t buf[BUF]; /* buffer for numeric conversions */ + const wchar_t *ccls; /* character class start */ + const wchar_t *ccle; /* character class end */ + int cclcompl = 0; /* ccl is complemented? */ + wint_t wi; /* handy wint_t */ + char *mbp = NULL; /* multibyte string pointer for %c %s %[ */ + size_t nconv; /* number of bytes in mb. conversion */ + char mbbuf[MB_LEN_MAX]; /* temporary mb. character buffer */ + + char *cp; + short *sp; + int *ip; +#ifdef FLOATING_POINT + float *flp; + _LONG_DOUBLE *ldp; + double *dp; +#endif + long *lp; +#ifndef _NO_LONGLONG + long long *llp; +#endif + + /* `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}; + + /* Macro to support positional arguments */ +#ifndef _NO_POS_ARGS +# define GET_ARG(n, ap, type) \ + ((type) (is_pos_arg \ + ? (n < numargs \ + ? args[n] \ + : get_arg (n, &ap, &numargs, args)) \ + : (arg_index++ < numargs \ + ? args[n] \ + : (numargs < MAX_POS_ARGS \ + ? args[numargs++] = va_arg (ap, void *) \ + : va_arg (ap, void *))))) +#else +# define GET_ARG(n, ap, type) (va_arg (ap, type)) +#endif + + __sfp_lock_acquire (); + _flockfile (fp); + + ORIENT (fp, 1); + + nassigned = 0; + nread = 0; + ccls = ccle = NULL; + for (;;) + { + c = *fmt++; + if (c == L'\0') + goto all_done; + if (iswspace (c)) + { + while ((c = _fgetwc_r (rptr, fp)) != WEOF && iswspace(c)) + ; + if (c != WEOF) + _ungetwc_r (rptr, c, fp); + continue; + } + if (c != L'%') + goto literal; + width = 0; + flags = 0; +#ifndef _NO_POS_ARGS + N = arg_index; + is_pos_arg = 0; +#endif + + /* + * switch on the format. continue if done; break once format + * type is derived. + */ + + again: + c = *fmt++; + + switch (c) + { + case L'%': + literal: + if ((wi = _fgetwc_r (rptr, fp)) == WEOF) + goto input_failure; + if (wi != c) + { + _ungetwc_r (rptr, wi, fp); + goto input_failure; + } + nread++; + continue; + + case L'*': + flags |= SUPPRESS; + goto again; + case L'l': +#if defined _WANT_IO_C99_FORMATS || !defined _NO_LONGLONG + if (*fmt == L'l') /* Check for 'll' = long long (SUSv3) */ + { + ++fmt; + flags |= LONGDBL; + } + else +#endif + flags |= LONG; + goto again; + case L'L': + flags |= LONGDBL; + goto again; + case L'h': +#ifdef _WANT_IO_C99_FORMATS + if (*fmt == 'h') /* Check for 'hh' = char int (SUSv3) */ + { + ++fmt; + flags |= CHAR; + } + else +#endif + flags |= SHORT; + goto again; +#ifdef _WANT_IO_C99_FORMATS + case L'j': /* intmax_t */ + if (sizeof (intmax_t) == sizeof (long)) + flags |= LONG; + else + flags |= LONGDBL; + goto again; + case L't': /* ptrdiff_t */ + if (sizeof (ptrdiff_t) < sizeof (int)) + /* POSIX states ptrdiff_t is 16 or more bits, as + is short. */ + flags |= SHORT; + else if (sizeof (ptrdiff_t) == sizeof (int)) + /* no flag needed */; + else if (sizeof (ptrdiff_t) <= sizeof (long)) + flags |= LONG; + else + /* POSIX states that at least one programming + environment must support ptrdiff_t no wider than + long, but that means other environments can + have ptrdiff_t as wide as long long. */ + flags |= LONGDBL; + goto again; + case L'z': /* size_t */ + if (sizeof (size_t) < sizeof (int)) + /* POSIX states size_t is 16 or more bits, as is short. */ + flags |= SHORT; + else if (sizeof (size_t) == sizeof (int)) + /* no flag needed */; + else if (sizeof (size_t) <= sizeof (long)) + flags |= LONG; + else + /* POSIX states that at least one programming + environment must support size_t no wider than + long, but that means other environments can + have size_t as wide as long long. */ + flags |= LONGDBL; + goto again; +#endif /* _WANT_IO_C99_FORMATS */ + + case L'0': + case L'1': + case L'2': + case L'3': + case L'4': + case L'5': + case L'6': + case L'7': + case L'8': + case L'9': + width = width * 10 + c - L'0'; + goto again; + +#ifndef _NO_POS_ARGS + case L'$': + if (width <= MAX_POS_ARGS) + { + N = width - 1; + is_pos_arg = 1; + width = 0; + goto again; + } + rptr->_errno = EINVAL; + goto input_failure; +#endif /* !_NO_POS_ARGS */ + + case L'd': + c = CT_INT; + ccfn = (unsigned long (*)CCFN_PARAMS)_wcstol_r; + base = 10; + break; + + case L'i': + c = CT_INT; + ccfn = (unsigned long (*)CCFN_PARAMS)_wcstol_r; + base = 0; + break; + + case L'o': + c = CT_INT; + ccfn = _wcstoul_r; + base = 8; + break; + + case L'u': + c = CT_INT; + ccfn = _wcstoul_r; + base = 10; + break; + + case L'X': + case L'x': + flags |= PFXOK; /* enable 0x prefixing */ + c = CT_INT; + ccfn = _wcstoul_r; + base = 16; + break; + +#ifdef FLOATING_POINT +# ifdef _WANT_IO_C99_FORMATS + case L'A': + case L'a': + case L'F': +# endif + case L'E': + case L'G': + case L'e': + case L'f': + case L'g': + c = CT_FLOAT; + break; +#endif + +#ifdef _WANT_IO_C99_FORMATS + case L'S': + flags |= LONG; + /* FALLTHROUGH */ +#endif + + case L's': + c = CT_STRING; + break; + + case L'[': + 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; + +#ifdef _WANT_IO_C99_FORMATS + case 'C': + flags |= LONG; + /* FALLTHROUGH */ +#endif + + case 'c': + flags |= NOSKIP; + c = CT_CHAR; + break; + + case 'p': /* pointer format is like hex */ + flags |= POINTER | PFXOK; + c = CT_INT; + ccfn = _wcstoul_r; + base = 16; + break; + + case 'n': + if (flags & SUPPRESS) /* ??? */ + continue; +#ifdef _WANT_IO_C99_FORMATS + if (flags & CHAR) + { + cp = GET_ARG (N, ap, char *); + *cp = nread; + } + else +#endif + if (flags & SHORT) + { + sp = GET_ARG (N, ap, short *); + *sp = nread; + } + else if (flags & LONG) + { + lp = GET_ARG (N, ap, long *); + *lp = nread; + } +#ifndef _NO_LONGLONG + else if (flags & LONGDBL) + { + llp = GET_ARG (N, ap, long long*); + *llp = nread; + } +#endif + else + { + ip = GET_ARG (N, ap, int *); + *ip = nread; + } + continue; + + /* + * Disgusting backwards compatibility hacks. XXX + */ + case L'\0': /* compat */ + _funlockfile (fp); + __sfp_lock_release (); + return EOF; + + default: /* compat */ + goto match_failure; + } + + /* + * Consume leading white space, except for formats that + * suppress this. + */ + if ((flags & NOSKIP) == 0) + { + while ((wi = _fgetwc_r (rptr, fp)) != WEOF && iswspace (wi)) + nread++; + if (wi == WEOF) + goto input_failure; + _ungetwc_r (rptr, 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_r (rptr, 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; + memset ((_PTR)&mbs, '\0', sizeof (mbstate_t)); + while (width != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF) + { + if (width >= MB_CUR_MAX && !(flags & SUPPRESS)) + { + nconv = _wcrtomb_r (rptr, mbp, wi, &mbs); + if (nconv == (size_t) -1) + goto input_failure; + } + else + { + nconv = _wcrtomb_r (rptr, mbbuf, wi, &mbs); + if (nconv == (size_t) -1) + goto input_failure; + if (nconv > width) + { + _ungetwc_r (rptr, 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++; + } + 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_r (rptr, fp)) != WEOF + && width-- != 0 && INCCL (wi)) + n++; + if (wi != WEOF) + _ungetwc_r (rptr, wi, fp); + if (n == 0) + goto match_failure; + } + else if (flags & LONG) + { + p0 = p = va_arg(ap, wchar_t *); + while ((wi = _fgetwc_r (rptr, fp)) != WEOF + && width-- != 0 && INCCL (wi)) + *p++ = (wchar_t) wi; + if (wi != WEOF) + _ungetwc_r (rptr, wi, fp); + n = p - p0; + if (n == 0) + goto match_failure; + } + else + { + if (!(flags & SUPPRESS)) + mbp = va_arg(ap, char *); + n = 0; + memset ((_PTR) &mbs, '\0', sizeof (mbstate_t)); + while ((wi = _fgetwc_r (rptr, fp)) != WEOF + && width-- != 0 && INCCL (wi)) + { + if (width >= MB_CUR_MAX && !(flags & SUPPRESS)) + { + nconv = _wcrtomb_r (rptr, 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_r (rptr, wi, fp); + 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_r (rptr, fp)) != WEOF + && width-- != 0 && !iswspace (wi)) + nread++; + if (wi != WEOF) + _ungetwc_r (rptr, wi, fp); + } + else if (flags & LONG) + { + p0 = p = va_arg(ap, wchar_t *); + while ((wi = _fgetwc_r (rptr, fp)) != WEOF + && width-- != 0 && !iswspace (wi)) + { + *p++ = (wchar_t) wi; + nread++; + } + if (wi != WEOF) + _ungetwc_r (rptr, wi, fp); + *p = '\0'; + nassigned++; + } + else + { + if (!(flags & SUPPRESS)) + mbp = va_arg(ap, char *); + memset ((_PTR) &mbs, '\0', sizeof (mbstate_t)); + while ((wi = _fgetwc_r (rptr, 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_r (rptr, wi, fp); + if (!(flags & SUPPRESS)) + { + *mbp = 0; + nassigned++; + } + } + continue; + + case CT_INT: + { + /* scan an integer as if by wcstol/wcstoul */ + 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_r (rptr, 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 L'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 L'1': + case L'2': + case L'3': + case L'4': + case L'5': + case L'6': + case L'7': + base = basefix[base]; + flags &= ~(SIGNOK | PFXOK | NDIGITS); + goto ok; + + /* digits 8 and 9 ok iff decimal or hex */ + case L'8': + case L'9': + base = basefix[base]; + if (base <= 8) + break; /* not legal here */ + flags &= ~(SIGNOK | PFXOK | NDIGITS); + goto ok; + + /* letters ok iff hex */ + case L'A': + case L'B': + case L'C': + case L'D': + case L'E': + case L'F': + case L'a': + case L'b': + case L'c': + case L'd': + case L'e': + case L'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 L'+': + case L'-': + if (flags & SIGNOK) + { + flags &= ~SIGNOK; + flags |= HAVESIGN; + goto ok; + } + break; + + /* x ok iff flag still set & single 0 seen */ + case L'x': + case L'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_r (rptr, 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'. + * Use of ungetc here and below assumes ASCII encoding; we are only + * pushing back 7-bit characters, so casting to unsigned char is + * not necessary. + */ + if (flags & NDIGITS) + { + if (p > buf) + _ungetwc_r (rptr, *--p, fp); /* [-+xX] */ + goto match_failure; + } + c = p[-1]; + if (c == L'x' || c == L'X') + { + --p; + _ungetwc_r (rptr, c, fp); + } + if ((flags & SUPPRESS) == 0) + { + unsigned long res; + + *p = 0; + res = (*ccfn) (rptr, buf, (wchar_t **) NULL, base); + if (flags & POINTER) + { + void **vp = GET_ARG (N, ap, void **); +#ifndef _NO_LONGLONG + if (sizeof (uintptr_t) > sizeof (unsigned long)) + { + unsigned long long resll; + resll = _wcstoull_r (rptr, buf, (wchar_t **) NULL, base); + *vp = (void *) (uintptr_t) resll; + } + else +#endif /* !_NO_LONGLONG */ + *vp = (void *) (uintptr_t) res; + } +#ifdef _WANT_IO_C99_FORMATS + else if (flags & CHAR) + { + cp = GET_ARG (N, ap, char *); + *cp = res; + } +#endif + else if (flags & SHORT) + { + sp = GET_ARG (N, ap, short *); + *sp = res; + } + else if (flags & LONG) + { + lp = GET_ARG (N, ap, long *); + *lp = res; + } +#ifndef _NO_LONGLONG + else if (flags & LONGDBL) + { + unsigned long long resll; + if (ccfn == _wcstoul_r) + resll = _wcstoull_r (rptr, buf, (wchar_t **) NULL, base); + else + resll = _wcstoll_r (rptr, buf, (wchar_t **) NULL, base); + llp = GET_ARG (N, ap, long long*); + *llp = resll; + } +#endif + else + { + ip = GET_ARG (N, ap, int *); + *ip = res; + } + nassigned++; + } + nread += p - buf; + break; + } +#ifdef FLOATING_POINT + case CT_FLOAT: + { + /* scan a floating point number as if by wcstod */ + /* This code used to assume that the number of digits is reasonable. + However, ANSI / ISO C makes no such stipulation; we have to get + exact results even when there is an unreasonable amount of + leading zeroes. */ + long leading_zeroes = 0; + long zeroes, exp_adjust; + wchar_t *exp_start = NULL; + unsigned width_left = 0; + char nancount = 0; + char infcount = 0; +#ifdef hardway + if (width == 0 || width > sizeof (buf) - 1) +#else + /* size_t is unsigned, hence this optimisation */ + if (width - 1 > sizeof (buf) - 2) +#endif + { + width_left = width - (sizeof (buf) - 1); + width = sizeof (buf) - 1; + } + flags |= SIGNOK | NDIGITS | DPTOK | EXPOK; + zeroes = 0; + exp_adjust = 0; + for (p = buf; width; ) + { + c = _fgetwc_r (rptr, fp); + /* + * This code mimicks the integer conversion + * code, but is much simpler. + */ + switch (c) + { + case L'0': + if (flags & NDIGITS) + { + flags &= ~SIGNOK; + zeroes++; + if (width_left) + { + width_left--; + width++; + } + goto fskip; + } + /* Fall through. */ + case L'1': + case L'2': + case L'3': + case L'4': + case L'5': + case L'6': + case L'7': + case L'8': + case L'9': + if (nancount + infcount == 0) + { + flags &= ~(SIGNOK | NDIGITS); + goto fok; + } + break; + + case L'+': + case L'-': + if (flags & SIGNOK) + { + flags &= ~SIGNOK; + goto fok; + } + break; + case L'n': + case L'N': + if (nancount == 0 && zeroes == 0 + && (flags & (NDIGITS | DPTOK | EXPOK)) == + (NDIGITS | DPTOK | EXPOK)) + { + flags &= ~(SIGNOK | DPTOK | EXPOK | NDIGITS); + nancount = 1; + goto fok; + } + if (nancount == 2) + { + nancount = 3; + goto fok; + } + if (infcount == 1 || infcount == 4) + { + infcount++; + goto fok; + } + break; + case L'a': + case L'A': + if (nancount == 1) + { + nancount = 2; + goto fok; + } + break; + case L'i': + if (infcount == 0 && zeroes == 0 + && (flags & (NDIGITS | DPTOK | EXPOK)) == + (NDIGITS | DPTOK | EXPOK)) + { + flags &= ~(SIGNOK | DPTOK | EXPOK | NDIGITS); + infcount = 1; + goto fok; + } + if (infcount == 3 || infcount == 5) + { + infcount++; + goto fok; + } + break; + case L'f': + case L'F': + if (infcount == 2) + { + infcount = 3; + goto fok; + } + break; + case L't': + case L'T': + if (infcount == 6) + { + infcount = 7; + goto fok; + } + break; + case L'y': + case L'Y': + if (infcount == 7) + { + infcount = 8; + goto fok; + } + break; + case L'.': + if (flags & DPTOK) + { + flags &= ~(SIGNOK | DPTOK); + leading_zeroes = zeroes; + goto fok; + } + break; + case L'e': + case L'E': + /* no exponent without some digits */ + if ((flags & (NDIGITS | EXPOK)) == EXPOK + || ((flags & EXPOK) && zeroes)) + { + if (! (flags & DPTOK)) + { + exp_adjust = zeroes - leading_zeroes; + exp_start = p; + } + flags = + (flags & ~(EXPOK | DPTOK)) | + SIGNOK | NDIGITS; + zeroes = 0; + goto fok; + } + break; + } + if (c != WEOF) + _ungetwc_r (rptr, c, fp); + break; + fok: + *p++ = c; + fskip: + width--; + ++nread; + } + if (zeroes) + flags &= ~NDIGITS; + /* We may have a 'N' or possibly even [sign] 'N' 'a' as the + start of 'NaN', only to run out of chars before it was + complete (or having encountered a non-matching char). So + check here if we have an outstanding nancount, and if so + put back the chars we did swallow and treat as a failed + match. + + FIXME - we still don't handle NAN([0xdigits]). */ + if (nancount - 1U < 2U) /* nancount && nancount < 3 */ + { + /* Newlib's ungetc works even if we called __srefill in + the middle of a partial parse, but POSIX does not + guarantee that in all implementations of ungetc. */ + while (p > buf) + { + _ungetwc_r (rptr, *--p, fp); /* [-+nNaA] */ + --nread; + } + goto match_failure; + } + /* Likewise for 'inf' and 'infinity'. But be careful that + 'infinite' consumes only 3 characters, leaving the stream + at the second 'i'. */ + if (infcount - 1U < 7U) /* infcount && infcount < 8 */ + { + if (infcount >= 3) /* valid 'inf', but short of 'infinity' */ + while (infcount-- > 3) + { + _ungetwc_r (rptr, *--p, fp); /* [iInNtT] */ + --nread; + } + else + { + while (p > buf) + { + _ungetwc_r (rptr, *--p, fp); /* [-+iInN] */ + --nread; + } + goto match_failure; + } + } + /* + * If no digits, might be missing exponent digits + * (just give back the exponent) or might be missing + * regular digits, but had sign and/or decimal point. + */ + if (flags & NDIGITS) + { + if (flags & EXPOK) + { + /* no digits at all */ + while (p > buf) + { + _ungetwc_r (rptr, *--p, fp); /* [-+.] */ + --nread; + } + goto match_failure; + } + /* just a bad exponent (e and maybe sign) */ + c = *--p; + --nread; + if (c != L'e' && c != L'E') + { + _ungetwc_r (rptr, c, fp); /* [-+] */ + c = *--p; + --nread; + } + _ungetwc_r (rptr, c, fp); /* [eE] */ + } + if ((flags & SUPPRESS) == 0) + { + double res = 0; +#ifdef _NO_LONGDBL +#define QUAD_RES res; +#else /* !_NO_LONG_DBL */ + long double qres = 0; +#define QUAD_RES qres; +#endif /* !_NO_LONG_DBL */ + long new_exp = 0; + + *p = 0; + if ((flags & (DPTOK | EXPOK)) == EXPOK) + { + exp_adjust = zeroes - leading_zeroes; + new_exp = -exp_adjust; + exp_start = p; + } + else if (exp_adjust) + new_exp = _wcstol_r (rptr, (exp_start + 1), NULL, 10) - exp_adjust; + if (exp_adjust) + { + + /* If there might not be enough space for the new exponent, + truncate some trailing digits to make room. */ + if (exp_start >= buf + sizeof (buf) - MAX_LONG_LEN) + exp_start = buf + sizeof (buf) - MAX_LONG_LEN - 1; + swprintf (exp_start, MAX_LONG_LEN, L"e%ld", new_exp); + } + + /* FIXME: We don't have wcstold yet. */ +#if 0//ndef _NO_LONGDBL /* !_NO_LONGDBL */ + if (flags & LONGDBL) + qres = _wcstold_r (rptr, buf, NULL); + else +#endif + res = _wcstod_r (rptr, buf, NULL); + + if (flags & LONG) + { + dp = GET_ARG (N, ap, double *); + *dp = res; + } + else if (flags & LONGDBL) + { + ldp = GET_ARG (N, ap, _LONG_DOUBLE *); + *ldp = QUAD_RES; + } + else + { + flp = GET_ARG (N, ap, float *); + if (isnan (res)) + *flp = nanf (NULL); + else + *flp = res; + } + nassigned++; + } + break; + } +#endif /* FLOATING_POINT */ + } + } +input_failure: + /* On read failure, return EOF failure regardless of matches; errno + should have been set prior to here. On EOF failure (including + invalid format string), return EOF if no matches yet, else number + of matches made prior to failure. */ + _funlockfile (fp); + __sfp_lock_release (); + return nassigned && !(fp->_flags & __SERR) ? nassigned : EOF; +match_failure: +all_done: + /* Return number of matches, which can be 0 on match failure. */ + _funlockfile (fp); + __sfp_lock_release (); + return nassigned; +} + +#ifndef _NO_POS_ARGS +/* Process all intermediate arguments. Fortunately, with wscanf, all + intermediate arguments are sizeof(void*), so we don't need to scan + ahead in the format string. */ +static void * +get_arg (int n, va_list *ap, int *numargs_p, void **args) +{ + int numargs = *numargs_p; + while (n >= numargs) + args[numargs++] = va_arg (*ap, void *); + *numargs_p = numargs; + return args[n]; +} +#endif /* !_NO_POS_ARGS */ -- cgit v1.2.3