/* Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __GNUC__ # define HAVE_LONGLONG # define LONGLONG long long #else # define LONGLONG long #endif /* Determine whether we have to handle `long long' at all. */ #if LONG_MAX == LONG_LONG_MAX # define need_longlong 0 #else # define need_longlong 1 #endif /* Determine whether we have to handle `long'. */ #if INT_MAX == LONG_MAX # define need_long 0 #else # define need_long 1 #endif /* Those are flags in the conversion format. */ #define LONG 0x001 /* l: long or double */ #define LONGDBL 0x002 /* L: long long or long double */ #define SHORT 0x004 /* h: short */ #define SUPPRESS 0x008 /* *: suppress assignment */ #define POINTER 0x010 /* weird %p pointer (`fake hex') */ #define NOSKIP 0x020 /* do not skip blanks */ #define WIDTH 0x040 /* width was given */ #define GROUP 0x080 /* ': group numbers */ #define MALLOC 0x100 /* a: malloc strings */ #define CHAR 0x200 /* hh: char */ #ifdef USE_IN_LIBIO # include # include # undef va_list # define va_list _IO_va_list # define ungetc(c, s) ((void) ((int) c == EOF \ || (--read_in, \ _IO_sputbackc (s, (unsigned char) c)))) # define inchar() (c == EOF ? EOF \ : ((c = _IO_getc_unlocked (s)), \ (void) (c != EOF && ++read_in), c)) # define encode_error() do { \ if (errp != NULL) *errp |= 4; \ _IO_funlockfile (s); \ __libc_cleanup_end (0); \ __set_errno (EILSEQ); \ return done; \ } while (0) # define conv_error() do { \ if (errp != NULL) *errp |= 2; \ _IO_funlockfile (s); \ __libc_cleanup_end (0); \ return done; \ } while (0) # define input_error() do { \ _IO_funlockfile (s); \ if (errp != NULL) *errp |= 1; \ __libc_cleanup_end (0); \ return done ?: EOF; \ } while (0) # define memory_error() do { \ _IO_funlockfile (s); \ __set_errno (ENOMEM); \ __libc_cleanup_end (0); \ return EOF; \ } while (0) # define ARGCHECK(s, format) \ do \ { \ /* Check file argument for consistence. */ \ CHECK_FILE (s, EOF); \ if (s->_flags & _IO_NO_READS) \ { \ __set_errno (EBADF); \ return EOF; \ } \ else if (format == NULL) \ { \ MAYBE_SET_EINVAL; \ return EOF; \ } \ } while (0) # define LOCK_STREAM(S) \ __libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, (S)); \ _IO_flockfile (S) # define UNLOCK_STREAM(S) \ _IO_funlockfile (S); \ __libc_cleanup_region_end (0) #else # define ungetc(c, s) ((void) (c != EOF && --read_in), ungetc (c, s)) # define inchar() (c == EOF ? EOF \ : ((c = getc (s)), (void) (c != EOF && ++read_in), c)) # define encode_error() do { \ funlockfile (s); \ __set_errno (EILSEQ); \ return done; \ } while (0) # define conv_error() do { \ funlockfile (s); \ return done; \ } while (0) # define input_error() do { \ funlockfile (s); \ return done ?: EOF; \ } while (0) # define memory_error() do { \ funlockfile (s); \ __set_errno (ENOMEM); \ return EOF; \ } while (0) # define ARGCHECK(s, format) \ do \ { \ /* Check file argument for consistence. */ \ if (!__validfp (s) || !s->__mode.__read) \ { \ __set_errno (EBADF); \ return EOF; \ } \ else if (format == NULL) \ { \ __set_errno (EINVAL); \ return EOF; \ } \ } while (0) #if 1 /* XXX For now !!! */ # define flockfile(S) /* nothing */ # define funlockfile(S) /* nothing */ # define LOCK_STREAM(S) # define UNLOCK_STREAM(S) #else # define LOCK_STREAM(S) \ __libc_cleanup_region_start (&__funlockfile, (S)); \ __flockfile (S) # define UNLOCK_STREAM(S) \ __funlockfile (S); \ __libc_cleanup_region_end (0) #endif #endif /* Read formatted input from S according to the format string FORMAT, using the argument list in ARG. Return the number of assignments made, or -1 for an input error. */ #ifdef USE_IN_LIBIO int _IO_vfscanf (s, format, argptr, errp) _IO_FILE *s; const char *format; _IO_va_list argptr; int *errp; #else int __vfscanf (FILE *s, const char *format, va_list argptr) #endif { va_list arg; register const char *f = format; register unsigned char fc; /* Current character of the format. */ register size_t done = 0; /* Assignments done. */ register size_t read_in = 0; /* Chars read in. */ register int c = 0; /* Last char read. */ register int width; /* Maximum field width. */ register int flags; /* Modifiers for current format element. */ /* Status for reading F-P nums. */ char got_dot, got_e, negative; /* If a [...] is a [^...]. */ char not_in; #define exp_char not_in /* Base for integral numbers. */ int base; /* Signedness for integral numbers. */ int number_signed; #define is_hexa number_signed /* Decimal point character. */ wchar_t decimal; /* The thousands character of the current locale. */ wchar_t thousands; /* State for the conversions. */ mbstate_t state; /* Integral holding variables. */ union { long long int q; unsigned long long int uq; long int l; unsigned long int ul; } num; /* Character-buffer pointer. */ char *str = NULL; wchar_t *wstr = NULL; char **strptr = NULL; size_t strsize = 0; /* We must not react on white spaces immediately because they can possibly be matched even if in the input stream no character is available anymore. */ int skip_space = 0; /* Nonzero if we are reading a pointer. */ int read_pointer; /* Workspace. */ char *tw; /* Temporary pointer. */ char *wp = NULL; /* Workspace. */ size_t wpmax = 0; /* Maximal size of workspace. */ size_t wpsize; /* Currently used bytes in workspace. */ #define ADDW(Ch) \ do \ { \ if (wpsize == wpmax) \ { \ char *old = wp; \ wpmax = UCHAR_MAX > 2 * wpmax ? UCHAR_MAX : 2 * wpmax; \ wp = (char *) alloca (wpmax); \ if (old != NULL) \ memcpy (wp, old, wpsize); \ } \ wp[wpsize++] = (Ch); \ } \ while (0) #ifdef __va_copy __va_copy (arg, argptr); #else arg = (va_list) argptr; #endif ARGCHECK (s, format); /* Figure out the decimal point character. */ memset (&state, '\0', sizeof (state)); if (__mbrtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT), strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT)), &state) <= 0) decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT); /* Figure out the thousands separator character. */ memset (&state, '\0', sizeof (state)); if (__mbrtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP), strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP)), &state) <= 0) thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP); /* Lock the stream. */ LOCK_STREAM (s); /* From now on we use `state' to convert the format string. */ memset (&state, '\0', sizeof (state)); /* Run through the format string. */ while (*f != '\0') { unsigned int argpos; /* Extract the next argument, which is of type TYPE. For a %N$... spec, this is the Nth argument from the beginning; otherwise it is the next argument after the state now in ARG. */ #ifdef __va_copy # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ unsigned int pos = argpos; \ va_list arg; \ __va_copy (arg, argptr); \ while (--pos > 0) \ (void) va_arg (arg, void *); \ va_arg (arg, type); \ })) #else # if 0 /* XXX Possible optimization. */ # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ va_list arg = (va_list) argptr; \ arg = (va_list) ((char *) arg \ + (argpos - 1) \ * __va_rounded_size (void *)); \ va_arg (arg, type); \ })) # else # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ unsigned int pos = argpos; \ va_list arg = (va_list) argptr; \ while (--pos > 0) \ (void) va_arg (arg, void *); \ va_arg (arg, type); \ })) # endif #endif if (!isascii (*f)) { /* Non-ASCII, may be a multibyte. */ int len = __mbrlen (f, strlen (f), &state); if (len > 0) { do { c = inchar (); if (c == EOF) input_error (); else if (c != *f++) { ungetc (c, s); conv_error (); } } while (--len > 0); continue; } } fc = *f++; if (fc != '%') { /* Remember to skip spaces. */ if (isspace (fc)) { skip_space = 1; continue; } /* Read a character. */ c = inchar (); /* Characters other than format specs must just match. */ if (c == EOF) input_error (); /* We saw white space char as the last character in the format string. Now it's time to skip all leading white space. */ if (skip_space) { while (isspace (c)) if (inchar () == EOF && errno == EINTR) conv_error (); skip_space = 0; } if (c != fc) { ungetc (c, s); conv_error (); } continue; } /* This is the start of the conversion string. */ flags = 0; /* Not yet decided whether we read a pointer or not. */ read_pointer = 0; /* Initialize state of modifiers. */ argpos = 0; /* Prepare temporary buffer. */ wpsize = 0; /* Check for a positional parameter specification. */ if (isdigit (*f)) { argpos = *f++ - '0'; while (isdigit (*f)) argpos = argpos * 10 + (*f++ - '0'); if (*f == '$') ++f; else { /* Oops; that was actually the field width. */ width = argpos; flags |= WIDTH; argpos = 0; goto got_width; } } /* Check for the assignment-suppressing and the number grouping flag. */ while (*f == '*' || *f == '\'') switch (*f++) { case '*': flags |= SUPPRESS; break; case '\'': flags |= GROUP; break; } /* We have seen width. */ if (isdigit (*f)) flags |= WIDTH; /* Find the maximum field width. */ width = 0; while (isdigit (*f)) { width *= 10; width += *f++ - '0'; } got_width: if (width == 0) width = -1; /* Check for type modifiers. */ switch (*f++) { case 'h': /* ints are short ints or chars. */ if (*f == 'h') { ++f; flags |= CHAR; } else flags |= SHORT; break; case 'l': if (*f == 'l') { /* A double `l' is equivalent to an `L'. */ ++f; flags |= LONGDBL | LONG; } else /* ints are long ints. */ flags |= LONG; break; case 'q': case 'L': /* doubles are long doubles, and ints are long long ints. */ flags |= LONGDBL | LONG; break; case 'a': /* The `a' is used as a flag only if followed by `s', `S' or `['. */ if (*f != 's' && *f != 'S' && *f != '[') { --f; break; } /* String conversions (%s, %[) take a `char **' arg and fill it in with a malloc'd pointer. */ flags |= MALLOC; break; case 'z': if (need_longlong && sizeof (size_t) > sizeof (unsigned long int)) flags |= LONGDBL; else if (sizeof (size_t) > sizeof (unsigned int)) flags |= LONG; break; case 'j': if (need_longlong && sizeof (uintmax_t) > sizeof (unsigned long int)) flags |= LONGDBL; else if (sizeof (uintmax_t) > sizeof (unsigned int)) flags |= LONG; break; case 't': if (need_longlong && sizeof (ptrdiff_t) > sizeof (long int)) flags |= LONGDBL; else if (sizeof (ptrdiff_t) > sizeof (int)) flags |= LONG; break; default: /* Not a recognized modifier. Backup. */ --f; break; } /* End of the format string? */ if (*f == '\0') conv_error (); /* Find the conversion specifier. */ fc = *f++; if (skip_space || (fc != '[' && fc != 'c' && fc != 'C' && fc != 'n')) { /* Eat whitespace. */ int save_errno = errno; errno = 0; do if (inchar () == EOF && errno == EINTR) input_error (); while (isspace (c)); errno = save_errno; ungetc (c, s); skip_space = 0; } switch (fc) { case '%': /* Must match a literal '%'. */ c = inchar (); if (c == EOF) input_error (); if (c != fc) { ungetc (c, s); conv_error (); } break; case 'n': /* Answer number of assignments done. */ /* Corrigendum 1 to ISO C 1990 describes the allowed flags with the 'n' conversion specifier. */ if (!(flags & SUPPRESS)) { /* Don't count the read-ahead. */ if (need_longlong && (flags & LONGDBL)) *ARG (long long int *) = read_in; else if (need_long && (flags & LONG)) *ARG (long int *) = read_in; else if (flags & SHORT) *ARG (short int *) = read_in; else if (!(flags & CHAR)) *ARG (int *) = read_in; else *ARG (char *) = read_in; #ifdef NO_BUG_IN_ISO_C_CORRIGENDUM_1 /* We have a severe problem here. The ISO C standard contradicts itself in explaining the effect of the %n format in `scanf'. While in ISO C:1990 and the ISO C Amendement 1:1995 the result is described as Execution of a %n directive does not effect the assignment count returned at the completion of execution of the f(w)scanf function. in ISO C Corrigendum 1:1994 the following was added: Subclause 7.9.6.2 Add the following fourth example: In: #include int d1, d2, n1, n2, i; i = sscanf("123", "%d%n%n%d", &d1, &n1, &n2, &d2); the value 123 is assigned to d1 and the value3 to n1. Because %n can never get an input failure the value of 3 is also assigned to n2. The value of d2 is not affected. The value 3 is assigned to i. We go for now with the historically correct code from ISO C, i.e., we don't count the %n assignments. When it ever should proof to be wrong just remove the #ifdef above. */ ++done; #endif } break; case 'c': /* Match characters. */ if ((flags & LONG) == 0) { if (!(flags & SUPPRESS)) { str = ARG (char *); if (str == NULL) conv_error (); } c = inchar (); if (c == EOF) input_error (); if (width == -1) width = 1; if (!(flags & SUPPRESS)) { do *str++ = c; while (--width > 0 && inchar () != EOF); } else while (--width > 0 && inchar () != EOF); if (!(flags & SUPPRESS)) ++done; break; } /* FALLTHROUGH */ case 'C': /* Get UTF-8 encoded wide character. Here we assume (as in other parts of the libc) that we only have to handle UTF-8. */ { wint_t val; size_t cnt = 0; int first = 1; if (!(flags & SUPPRESS)) { wstr = ARG (wchar_t *); if (str == NULL) conv_error (); } do { #define NEXT_WIDE_CHAR(First) \ c = inchar (); \ if (c == EOF) \ { \ /* EOF is only an error for the first character. */ \ if (First) \ input_error (); \ else \ break; \ } \ val = c; \ if (val >= 0x80) \ { \ if ((c & 0xc0) == 0x80 || (c & 0xfe) == 0xfe) \ encode_error (); \ if ((c & 0xe0) == 0xc0) \ { \ /* We expect two bytes. */ \ cnt = 1; \ val &= 0x1f; \ } \ else if ((c & 0xf0) == 0xe0) \ { \ /* We expect three bytes. */ \ cnt = 2; \ val &= 0x0f; \ } \ else if ((c & 0xf8) == 0xf0) \ { \ /* We expect four bytes. */ \ cnt = 3; \ val &= 0x07; \ } \ else if ((c & 0xfc) == 0xf8) \ { \ /* We expect five bytes. */ \ cnt = 4; \ val &= 0x03; \ } \ else \ { \ /* We expect six bytes. */ \ cnt = 5; \ val &= 0x01; \ } \ \ do \ { \ c = inchar (); \ if (c == EOF \ || (c & 0xc0) == 0x80 || (c & 0xfe) == 0xfe) \ encode_error (); \ val <<= 6; \ val |= c & 0x3f; \ } \ while (--cnt > 0); \ } \ \ if (!(flags & SUPPRESS)) \ *wstr++ = val; \ First = 0 NEXT_WIDE_CHAR (first); } while (--width > 0); if (!(flags & SUPPRESS)) ++done; } break; case 's': /* Read a string. */ if (flags & LONG) /* We have to process a wide character string. */ goto wide_char_string; #define STRING_ARG(Str, Type) \ if (!(flags & SUPPRESS)) \ { \ if (flags & MALLOC) \ { \ /* The string is to be stored in a malloc'd buffer. */ \ strptr = ARG (char **); \ if (strptr == NULL) \ conv_error (); \ /* Allocate an initial buffer. */ \ strsize = 100; \ *strptr = malloc (strsize * sizeof (Type)); \ Str = (Type *) *strptr; \ } \ else \ Str = ARG (Type *); \ if (Str == NULL) \ conv_error (); \ } STRING_ARG (str, char); c = inchar (); if (c == EOF) input_error (); do { if (isspace (c)) { ungetc (c, s); break; } #define STRING_ADD_CHAR(Str, c, Type) \ if (!(flags & SUPPRESS)) \ { \ *Str++ = c; \ if ((flags & MALLOC) && (char *) Str == *strptr + strsize) \ { \ /* Enlarge the buffer. */ \ Str = realloc (*strptr, strsize * 2 * sizeof (Type)); \ if (Str == NULL) \ { \ /* Can't allocate that much. Last-ditch effort. */\ Str = realloc (*strptr, \ (strsize + 1) * sizeof (Type)); \ if (Str == NULL) \ { \ /* We lose. Oh well. \ Terminate the string and stop converting, \ so at least we don't skip any input. */ \ ((Type *) (*strptr))[strsize] = '\0'; \ ++done; \ conv_error (); \ } \ else \ { \ *strptr = (char *) Str; \ Str = ((Type *) *strptr) + strsize; \ ++strsize; \ } \ } \ else \ { \ *strptr = (char *) Str; \ Str = ((Type *) *strptr) + strsize; \ strsize *= 2; \ } \ } \ } STRING_ADD_CHAR (str, c, char); } while ((width <= 0 || --width > 0) && inchar () != EOF); if (!(flags & SUPPRESS)) { *str = '\0'; ++done; } break; case 'S': /* Wide character string. */ wide_char_string: { wint_t val; int first = 1; STRING_ARG (wstr, wchar_t); do { size_t cnt = 0; NEXT_WIDE_CHAR (first); if (__iswspace (val)) { /* XXX We would have to push back the whole wide char with possibly many bytes. But since scanf does not make a difference for white space characters we can simply push back a simple which is guaranteed to be in the [:space:] class. */ ungetc (' ', s); break; } STRING_ADD_CHAR (wstr, val, wchar_t); first = 0; } while (width <= 0 || --width > 0); if (!(flags & SUPPRESS)) { *wstr = L'\0'; ++done; } } break; case 'x': /* Hexadecimal integer. */ case 'X': /* Ditto. */ base = 16; number_signed = 0; goto number; case 'o': /* Octal integer. */ base = 8; number_signed = 0; goto number; case 'u': /* Unsigned decimal integer. */ base = 10; number_signed = 0; goto number; case 'd': /* Signed decimal integer. */ base = 10; number_signed = 1; goto number; case 'i': /* Generic number. */ base = 0; number_signed = 1; number: c = inchar (); if (c == EOF) input_error (); /* Check for a sign. */ if (c == '-' || c == '+') { ADDW (c); if (width > 0) --width; c = inchar (); } /* Look for a leading indication of base. */ if (width != 0 && c == '0') { if (width > 0) --width; ADDW (c); c = inchar (); if (width != 0 && _tolower (c) == 'x') { if (base == 0) base = 16; if (base == 16) { if (width > 0) --width; c = inchar (); } } else if (base == 0) base = 8; } if (base == 0) base = 10; /* Read the number into workspace. */ while (c != EOF && width != 0) { if (base == 16 ? !isxdigit (c) : ((!isdigit (c) || c - '0' >= base) && !((flags & GROUP) && base == 10 && c == thousands))) break; ADDW (c); if (width > 0) --width; c = inchar (); } if (wpsize == 0 || (wpsize == 1 && (wp[0] == '+' || wp[0] == '-'))) { /* There was no number. If we are supposed to read a pointer we must recognize "(nil)" as well. */ if (wpsize == 0 && read_pointer && (width < 0 || width >= 0) && c == '(' && _tolower (inchar ()) == 'n' && _tolower (inchar ()) == 'i' && _tolower (inchar ()) == 'l' && inchar () == ')') /* We must produce the value of a NULL pointer. A single '0' digit is enough. */ ADDW ('0'); else { /* The last read character is not part of the number anymore. */ ungetc (c, s); conv_error (); } } else /* The just read character is not part of the number anymore. */ ungetc (c, s); /* Convert the number. */ ADDW ('\0'); if (need_longlong && (flags & LONGDBL)) { if (number_signed) num.q = __strtoll_internal (wp, &tw, base, flags & GROUP); else num.uq = __strtoull_internal (wp, &tw, base, flags & GROUP); } else { if (number_signed) num.l = __strtol_internal (wp, &tw, base, flags & GROUP); else num.ul = __strtoul_internal (wp, &tw, base, flags & GROUP); } if (wp == tw) conv_error (); if (!(flags & SUPPRESS)) { if (! number_signed) { if (need_longlong && (flags & LONGDBL)) *ARG (unsigned LONGLONG int *) = num.uq; else if (need_long && (flags & LONG)) *ARG (unsigned long int *) = num.ul; else if (flags & SHORT) *ARG (unsigned short int *) = (unsigned short int) num.ul; else if (!(flags & CHAR)) *ARG (unsigned int *) = (unsigned int) num.ul; else *ARG (unsigned char *) = (unsigned char) num.ul; } else { if (need_longlong && (flags & LONGDBL)) *ARG (LONGLONG int *) = num.q; else if (need_long && (flags & LONG)) *ARG (long int *) = num.l; else if (flags & SHORT) *ARG (short int *) = (short int) num.l; else if (!(flags & CHAR)) *ARG (int *) = (int) num.l; else *ARG (signed char *) = (signed char) num.ul; } ++done; } break; case 'e': /* Floating-point numbers. */ case 'E': case 'f': case 'g': case 'G': case 'a': case 'A': c = inchar (); if (c == EOF) input_error (); /* Check for a sign. */ if (c == '-' || c == '+') { negative = c == '-'; if (inchar () == EOF) /* EOF is only an input error before we read any chars. */ conv_error (); if (! isdigit (c) && c != decimal) { /* This is no valid number. */ ungetc (c, s); input_error (); } if (width > 0) --width; } else negative = 0; /* Take care for the special arguments "nan" and "inf". */ if (_tolower (c) == 'n') { /* Maybe "nan". */ ADDW (c); if (inchar () == EOF || _tolower (c) != 'a') input_error (); ADDW (c); if (inchar () == EOF || _tolower (c) != 'n') input_error (); ADDW (c); /* It is "nan". */ goto scan_float; } else if (_tolower (c) == 'i') { /* Maybe "inf" or "infinity". */ ADDW (c); if (inchar () == EOF || _tolower (c) != 'n') input_error (); ADDW (c); if (inchar () == EOF || _tolower (c) != 'f') input_error (); ADDW (c); /* It is as least "inf". */ if (inchar () != EOF) { if (_tolower (c) == 'i') { /* Now we have to read the rest as well. */ ADDW (c); if (inchar () == EOF || _tolower (c) != 'n') input_error (); ADDW (c); if (inchar () == EOF || _tolower (c) != 'i') input_error (); ADDW (c); if (inchar () == EOF || _tolower (c) != 't') input_error (); ADDW (c); if (inchar () == EOF || _tolower (c) != 'y') input_error (); ADDW (c); } else /* Never mind. */ ungetc (c, s); } goto scan_float; } is_hexa = 0; exp_char = 'e'; if (c == '0') { ADDW (c); c = inchar (); if (_tolower (c) == 'x') { /* It is a number in hexadecimal format. */ ADDW (c); is_hexa = 1; exp_char = 'p'; /* Grouping is not allowed. */ flags &= ~GROUP; c = inchar (); } } got_dot = got_e = 0; do { if (isdigit (c)) ADDW (c); else if (!got_e && is_hexa && isxdigit (c)) ADDW (c); else if (got_e && wp[wpsize - 1] == exp_char && (c == '-' || c == '+')) ADDW (c); else if (wpsize > 0 && !got_e && _tolower (c) == exp_char) { ADDW (exp_char); got_e = got_dot = 1; } else if (c == decimal && !got_dot) { ADDW (c); got_dot = 1; } else if ((flags & GROUP) && c == thousands && !got_dot) ADDW (c); else { /* The last read character is not part of the number anymore. */ ungetc (c, s); break; } if (width > 0) --width; } while (width != 0 && inchar () != EOF); /* Have we read any character? If we try to read a number in hexadecimal notation and we have read only the `0x' prefix this is an error. */ if (wpsize == 0 || (is_hexa && wpsize == 2)) conv_error (); scan_float: /* Convert the number. */ ADDW ('\0'); if (flags & LONGDBL) { long double d = __strtold_internal (wp, &tw, flags & GROUP); if (!(flags & SUPPRESS) && tw != wp) *ARG (long double *) = negative ? -d : d; } else if (flags & LONG) { double d = __strtod_internal (wp, &tw, flags & GROUP); if (!(flags & SUPPRESS) && tw != wp) *ARG (double *) = negative ? -d : d; } else { float d = __strtof_internal (wp, &tw, flags & GROUP); if (!(flags & SUPPRESS) && tw != wp) *ARG (float *) = negative ? -d : d; } if (tw == wp) conv_error (); if (!(flags & SUPPRESS)) ++done; break; case '[': /* Character class. */ if (flags & LONG) { STRING_ARG (wstr, wchar_t); c = '\0'; /* This is to keep gcc quiet. */ } else { STRING_ARG (str, char); c = inchar (); if (c == EOF) input_error (); } if (*f == '^') { ++f; not_in = 1; } else not_in = 0; /* Fill WP with byte flags indexed by character. We will use this flag map for matching input characters. */ if (wpmax < UCHAR_MAX) { wpmax = UCHAR_MAX; wp = (char *) alloca (wpmax); } memset (wp, 0, UCHAR_MAX); fc = *f; if (fc == ']' || fc == '-') { /* If ] or - appears before any char in the set, it is not the terminator or separator, but the first char in the set. */ wp[fc] = 1; ++f; } while ((fc = *f++) != '\0' && fc != ']') { if (fc == '-' && *f != '\0' && *f != ']' && (unsigned char) f[-2] <= (unsigned char) *f) { /* Add all characters from the one before the '-' up to (but not including) the next format char. */ for (fc = f[-2]; fc < *f; ++fc) wp[fc] = 1; } else /* Add the character to the flag map. */ wp[fc] = 1; } if (fc == '\0') { if (!(flags & LONG)) ungetc (c, s); conv_error(); } if (flags & LONG) { wint_t val; int first = 1; do { size_t cnt = 0; NEXT_WIDE_CHAR (first); if (val <= 255 && wp[val] == not_in) { ungetc (val, s); break; } STRING_ADD_CHAR (wstr, val, wchar_t); if (width > 0) --width; first = 0; } while (width != 0); if (first) conv_error (); if (!(flags & SUPPRESS)) { *wstr = L'\0'; ++done; } } else { num.ul = read_in - 1; /* -1 because we already read one char. */ do { if (wp[c] == not_in) { ungetc (c, s); break; } STRING_ADD_CHAR (str, c, char); if (width > 0) --width; } while (width != 0 && inchar () != EOF); if (read_in == num.ul) conv_error (); if (!(flags & SUPPRESS)) { *str = '\0'; ++done; } } break; case 'p': /* Generic pointer. */ base = 16; /* A PTR must be the same size as a `long int'. */ flags &= ~(SHORT|LONGDBL); if (need_long) flags |= LONG; number_signed = 0; read_pointer = 1; goto number; default: /* If this is an unknown format character punt. */ conv_error (); } } /* The last thing we saw int the format string was a white space. Consume the last white spaces. */ if (skip_space) { do c = inchar (); while (isspace (c)); ungetc (c, s); } /* Unlock stream. */ UNLOCK_STREAM (s); return done; } #ifdef USE_IN_LIBIO int __vfscanf (FILE *s, const char *format, va_list argptr) { return _IO_vfscanf (s, format, argptr, NULL); } #endif weak_alias (__vfscanf, vfscanf)