/* 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 #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 # ifdef COMPILE_WPRINTF # define ungetc(c, s) ((void) ((int) c == WEOF \ || (--read_in, \ _IO_sputbackwc (s, (unsigned char) c)))) # define inchar() (c == EOF ? EOF \ : ((c = _IO_getwc_unlocked (s)), \ (void) (c != EOF && ++read_in), c)) # define MEMCPY(d, s, n) wmemcpy (d, s, n) # define ISSPACE(Ch) iswspace (Ch) # define ISDIGIT(Ch) iswdigit (Ch) # define ISXDIGIT(Ch) iswxdigit (Ch) # define UNGETC(Ch, S) ungetwc (Ch, S) # define TOLOWER(Ch) towlower (Ch) # define ORIENT if (_IO_fwide (s, 1) != 1) return EOF # define __strtoll_internal __wcstoll_internal # define __strtoull_internal __wcstoull_internal # define __strtol_internal __wcstol_internal # define __strtoul_internal __wcstoul_internal # define __strtold_internal __wcstold_internal # define __strtod_internal __wcstod_internal # define __strtof_internal __wcstof_internal # define L_(Str) L##Str # define CHAR_T wchar_t # define UCHAR_T unsigned int # define WINT_T wint_t # else # 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 MEMCPY(d, s, n) memcpy (d, s, n) # define ISSPACE(Ch) isspace (Ch) # define ISDIGIT(Ch) isdigit (Ch) # define ISXDIGIT(Ch) isxdigit (Ch) # define UNGETC(Ch, S) ungetc (Ch, S) # define TOLOWER(Ch) tolower (Ch) # define ORIENT if (_IO_fwide (s, -1) != -1) return EOF # define L_(Str) Str # define CHAR_T char # define UCHAR_T unsigned char # define WINT_T int # endif # 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 # ifdef COMPILE_WPRINTF int _IO_vfwscanf (s, format, argptr, errp) _IO_FILE *s; const wchar_t *format; _IO_va_list argptr; int *errp; # else int _IO_vfscanf (s, format, argptr, errp) _IO_FILE *s; const char *format; _IO_va_list argptr; int *errp; # endif #else int __vfscanf (FILE *s, const char *format, va_list argptr) #endif { va_list arg; register const CHAR_T *f = format; register UCHAR_T fc; /* Current character of the format. */ register size_t done = 0; /* Assignments done. */ register size_t read_in = 0; /* Chars read in. */ register WINT_T 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_T 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_T *tw; /* Temporary pointer. */ CHAR_T *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_T *old = wp; \ wpmax = UCHAR_MAX > 2 * wpmax ? UCHAR_MAX : 2 * wpmax; \ wp = (CHAR_T *) alloca (wpmax * sizeof (wchar_t)); \ 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 #ifdef ORIENT ORIENT; #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); #ifndef COMPILE_WPRINTF /* From now on we use `state' to convert the format string. */ memset (&state, '\0', sizeof (state)); #endif /* 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 #ifndef COMPILE_WPRINTF 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; } } #endif 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++ - L_('0'); while (ISDIGIT (*f)) argpos = argpos * 10 + (*f++ - L_('0')); if (*f == L_('$')) ++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 == L_('*') || *f == L_('\'')) switch (*f++) { case L_('*'): flags |= SUPPRESS; break; case L_('\''): 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++ - L_('0'); } got_width: if (width == 0) width = -1; /* Check for type modifiers. */ switch (*f++) { case L_('h'): /* ints are short ints or chars. */ if (*f == L_('h')) { ++f; flags |= CHAR; } else flags |= SHORT; break; case L_('l'): if (*f == L_('l')) { /* A double `l' is equivalent to an `L'. */ ++f; flags |= LONGDBL | LONG; } else /* ints are long ints. */ flags |= LONG; break; case L_('q'): case L_('L'): /* doubles are long doubles, and ints are long long ints. */ flags |= LONGDBL | LONG; break; case L_('a'): /* The `a' is used as a flag only if followed by `s', `S' or `['. */ if (*f != L_('s') && *f != L_('S') && *f != L_('[')) { --f; break; } /* String conversions (%s, %[) take a `char **' arg and fill it in with a malloc'd pointer. */ flags |= MALLOC; break; case L_('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 L_('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 L_('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 == L_('\0')) conv_error (); /* Find the conversion specifier. */ fc = *f++; if (skip_space || (fc != L_('[') && fc != L_('c') && fc != L_('C') && fc != L_('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 L_('%'): /* Must match a literal '%'. */ c = inchar (); if (c == EOF) input_error (); if (c != fc) { ungetc (c, s); conv_error (); } break; case L_('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 L_('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; #ifdef COMPILE_WPRINTF /* We have to convert the wide character(s) into multibyte characters and store the result. */ memset (&state, '\0', sizeof (state)); do { size_t n; n = wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state); if (n == (size_t) -1) /* No valid wide character. */ input_error (); /* Increment the output pointer. Even if we don't write anything. */ str += n; } while (--width > 0 && inchar () != EOF); #else if (!(flags & SUPPRESS)) { do *str++ = c; while (--width > 0 && inchar () != EOF); } else while (--width > 0 && inchar () != EOF); #endif if (!(flags & SUPPRESS)) ++done; break; } /* FALLTHROUGH */ case L_('C'): if (!(flags & SUPPRESS)) { wstr = ARG (wchar_t *); if (str == NULL) conv_error (); } c = inchar (); if (c == EOF) input_error (); #ifdef COMPILE_WPRINTF /* Just store the incoming wide characters. */ if (!(flags & SUPPRESS)) { do *wstr++ = c; while (--width > 0 && inchar () != EOF); } else while (--width > 0 && inchar () != EOF); #else { /* We have to convert the multibyte input sequence to wide characters. */ char buf[MB_LEN_MAX]; mbstate_t cstate; memset (&cstate, '\0', sizeof (cstate)); do { size_t cnt; /* This is what we present the mbrtowc function first. */ buf[0] = c; cnt = 1; while (1) { size_t n; n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL, buf, cnt, &cstate); if (n == (size_t) -2) { /* Possibly correct character, just not enough input. */ assert (cnt < MB_CUR_MAX); if (inchar () == EOF) encode_error (); buf[cnt++] = c; continue; } if (n != cnt) encode_error (); /* We have a match. */ break; } /* Advance the result pointer. */ ++wstr; } while (--width > 0 && inchar () != EOF); } #endif if (!(flags & SUPPRESS)) ++done; break; case L_('s'): /* Read a string. */ if (!(flags & LONG)) { #define STRING_ARG(Str, Type) \ do 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 = (char *) malloc (strsize * sizeof (Type)); \ Str = (Type *) *strptr; \ } \ else \ Str = ARG (Type *); \ if (Str == NULL) \ conv_error (); \ } while (0) STRING_ARG (str, char); c = inchar (); if (c == EOF) input_error (); #ifdef COMPILE_WPRINTF memset (&state, '\0', sizeof (state)); #endif do { if (ISSPACE (c)) { UNGETC (c, s); break; } #ifdef COMPILE_WPRINTF /* This is quite complicated. We have to convert the wide characters into multibyte characters and then store them. */ { size_t n; if (!(flags & SUPPRESS) && (flags & MALLOC) && str + MB_CUR_MAX >= *strptr + strsize) { /* We have to enlarge the buffer if the `a' flag was given. */ str = (char *) realloc (*strptr, strsize * 2); if (str == NULL) { /* Can't allocate that much. Last-ditch effort. */ str = (char *) realloc (*strptr, strsize + 1); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((char *) (*strptr))[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = (char *) str; str += strsize; ++strsize; } } else { *strptr = (char *) str; str += strsize; strsize *= 2; } } n = wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state); if (n == (size_t) -1) encode_error (); assert (n <= MB_CUR_MAX); str += n; } #else /* This is easy. */ if (!(flags & SUPPRESS)) { *str++ = c; if ((flags & MALLOC) && (char *) str == *strptr + strsize) { /* Enlarge the buffer. */ str = (char *) realloc (*strptr, 2 * strsize); if (str == NULL) { /* Can't allocate that much. Last-ditch effort. */ str = (char *) realloc (*strptr, strsize + 1); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((char *) (*strptr))[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = (char *) str; str += strsize; ++strsize; } } else { *strptr = (char *) str; str += strsize; strsize *= 2; } } } #endif } while ((width <= 0 || --width > 0) && inchar () != EOF); if (!(flags & SUPPRESS)) { #ifdef COMPILE_WPRINTF /* We have to emit the code to get into the intial state. */ char buf[MB_LEN_MAX]; size_t n = wcrtomb (buf, L'\0', &state); if (n > 0 && (flags & MALLOC) && str + n >= *strptr + strsize) { /* Enlarge the buffer. */ str = (char *) realloc (*strptr, (str + n + 1) - *strptr); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((char *) (*strptr))[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = (char *) str; str = ((char *) *strptr) + strsize; strsize = (str + n + 1) - *strptr; } } str = __mempcpy (str, buf, n); #endif *str = '\0'; if ((flags & MALLOC) && str - *strptr != strsize) { char *cp = (char *) realloc (*strptr, str - *strptr); if (cp != NULL) *strptr = cp; } ++done; } break; } /* FALLTHROUGH */ case L_('S'): { #ifndef COMPILE_WPRINTF mbstate_t cstate; #endif /* Wide character string. */ STRING_ARG (wstr, wchar_t); c = inchar (); if (c == EOF) input_error (); #ifndef COMPILE_WPRINTF memset (&cstate, '\0', sizeof (cstate)); #endif do { if (ISSPACE (c)) { UNGETC (c, s); break; } #ifdef COMPILE_WPRINTF /* This is easy. */ if (!(flags & SUPPRESS)) { *wstr++ = c; if ((flags & MALLOC) && wstr == (wchar_t *) *strptr + strsize) { /* Enlarge the buffer. */ wstr = (wchar_t *) realloc (*strptr, (2 * strsize) * sizeof (wchar_t)); if (wstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) realloc (*strptr, (strsize + sizeof (wchar_t))); if (wstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((wchar_t *) (*strptr))[strsize - 1] = L'\0'; ++done; conv_error (); } else { *strptr = (char *) wstr; wstr += strsize; ++strsize; } } else { *strptr = (char *) wstr; wstr += strsize; strsize *= 2; } } } #else { char buf[MB_LEN_MAX]; size_t cnt; buf[0] = c; cnt = 1; while (1) { size_t n; n = __mbrtowc (!(flags & SUPPRESS) ? wstr : NULL, buf, cnt, &cstate); if (n == (size_t) -2) { /* Possibly correct character, just not enough input. */ assert (cnt < MB_CUR_MAX); if (inchar () == EOF) encode_error (); buf[cnt++] = c; continue; } if (n != cnt) encode_error (); /* We have a match. */ break; } if (!(flags & SUPPRESS) && (flags & MALLOC) && wstr == (wchar_t *) *strptr + strsize) { /* Enlarge the buffer. */ wstr = (wchar_t *) realloc (*strptr, (2 * strsize * sizeof (wchar_t))); if (wstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) realloc (*strptr, ((strsize + 1) * sizeof (wchar_t))); if (wstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((wchar_t *) (*strptr))[strsize - 1] = L'\0'; ++done; conv_error (); } else { *strptr = (char *) wstr; wstr += strsize; ++strsize; } } else { *strptr = (char *) wstr; wstr += strsize; strsize *= 2; } } } #endif } while ((width <= 0 || --width > 0) && inchar () != EOF); if (!(flags & SUPPRESS)) { *wstr++ = L'\0'; if ((flags & MALLOC) && wstr - (wchar_t *) *strptr != strsize) { wchar_t *cp = (wchar_t *) realloc (*strptr, ((wstr - (wchar_t *) *strptr) * sizeof(wchar_t))); if (cp != NULL) *strptr = (char *) cp; } ++done; } } break; case L_('x'): /* Hexadecimal integer. */ case L_('X'): /* Ditto. */ base = 16; number_signed = 0; goto number; case L_('o'): /* Octal integer. */ base = 8; number_signed = 0; goto number; case L_('u'): /* Unsigned decimal integer. */ base = 10; number_signed = 0; goto number; case L_('d'): /* Signed decimal integer. */ base = 10; number_signed = 1; goto number; case L_('i'): /* Generic number. */ base = 0; number_signed = 1; number: c = inchar (); if (c == EOF) input_error (); /* Check for a sign. */ if (c == L_('-') || c == L_('+')) { ADDW (c); if (width > 0) --width; c = inchar (); } /* Look for a leading indication of base. */ if (width != 0 && c == L_('0')) { if (width > 0) --width; ADDW (c); c = inchar (); if (width != 0 && TOLOWER (c) == L_('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 - L_('0') >= base) && !((flags & GROUP) && base == 10 && c == thousands))) break; ADDW (c); if (width > 0) --width; c = inchar (); } if (wpsize == 0 || (wpsize == 1 && (wp[0] == L_('+') || wp[0] == L_('-')))) { /* 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 ()) == L_('n') && TOLOWER (inchar ()) == L_('i') && TOLOWER (inchar ()) == L_('l') && inchar () == L_(')')) /* We must produce the value of a NULL pointer. A single '0' digit is enough. */ ADDW (L_('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 (L_('\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 L_('e'): /* Floating-point numbers. */ case L_('E'): case L_('f'): case L_('g'): case L_('G'): case L_('a'): case L_('A'): c = inchar (); if (c == EOF) input_error (); /* Check for a sign. */ if (c == L_('-') || c == L_('+')) { negative = c == L_('-'); 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) == L_('n')) { /* Maybe "nan". */ ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('a')) input_error (); ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('n')) input_error (); ADDW (c); /* It is "nan". */ goto scan_float; } else if (TOLOWER (c) == L_('i')) { /* Maybe "inf" or "infinity". */ ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('n')) input_error (); ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('f')) input_error (); ADDW (c); /* It is as least "inf". */ if (inchar () != EOF) { if (TOLOWER (c) == L_('i')) { /* Now we have to read the rest as well. */ ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('n')) input_error (); ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('i')) input_error (); ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('t')) input_error (); ADDW (c); if (inchar () == EOF || TOLOWER (c) != L_('y')) input_error (); ADDW (c); } else /* Never mind. */ UNGETC (c, s); } goto scan_float; } is_hexa = 0; exp_char = L_('e'); if (c == L_('0')) { ADDW (c); c = inchar (); if (TOLOWER (c) == L_('x')) { /* It is a number in hexadecimal format. */ ADDW (c); is_hexa = 1; exp_char = L_('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 == L_('-') || c == L_('+'))) 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 (L_('\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 L_('['): /* Character class. */ if (flags & LONG) STRING_ARG (wstr, wchar_t); else STRING_ARG (str, char); if (*f == L_('^')) { ++f; not_in = 1; } else not_in = 0; if (width < 0) /* There is no width given so there is also no limit on the number of characters we read. Therefore we set width to a very high value to make the algorithm easier. */ width = INT_MAX; #ifdef COMPILE_WPRINTF /* Find the beginning and the end of the scanlist. We are not creating a lookup table since it would have to be too large. Instead we search each time through the string. This is not a constant lookup time but who uses this feature deserves to be punished. */ tw = (wchar_t *) f; /* Marks the beginning. */ if (*f == ']' || *f == '-') ++f; while ((fc = *f++) != L'\0' && fc != L']'); if (fc == L'\0') conv_error (); wp = (wchar_t *) f - 1; #else /* 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; } tw = (char *) f; while ((fc = *f++) != '\0' && fc != ']') if (fc == '-' && *f != '\0' && *f != ']' && f - 2 != tw && (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') conv_error(); #endif if (flags & LONG) { size_t now = read_in; #ifdef COMPILE_WPRINTF do { wchar_t *runp; if (inchar () == WEOF) break; /* Test whether it's in the scanlist. */ runp = tw; while (runp < wp) { if (runp[0] == L'-' && runp[1] != '\0' && runp[1] != ']' && runp != tw && (unsigned int) runp[-1] <= (unsigned int) runp[1]) { /* Match against all characters in between the first and last character of the sequence. */ wchar_t wc; for (wc = runp[-1] + 1; wc < runp[1]; ++wc) if (wc == c) break; if (wc == runp[1] && !not_in) break; if (wc == runp[1] && not_in) { /* The current character is not in the scanset. */ ungetwc (c, s); goto out; } } else { if (*runp == runp[1] && !not_in) break; if (*runp != runp[1] && not_in) { ungetwc (c ,s); goto out; } } ++runp; } if (!(flags & SUPPRESS)) { *wstr++ = c; if ((flags & MALLOC) && wstr == (wchar_t *) *strptr + strsize) { /* Enlarge the buffer. */ wstr = (wchar_t *) realloc (*strptr, (2 * strsize) * sizeof (wchar_t)); if (wstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) realloc (*strptr, (strsize + sizeof (wchar_t))); if (wstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((wchar_t *) (*strptr))[strsize - 1] = L'\0'; ++done; conv_error (); } else { *strptr = (char *) wstr; wstr += strsize; ++strsize; } } else { *strptr = (char *) wstr; wstr += strsize; strsize *= 2; } } } } while (--width > 0); out: #else char buf[MB_LEN_MAX]; size_t cnt = 0; mbstate_t cstate; memset (&cstate, '\0', sizeof (cstate)); do { again: if (inchar () == EOF) break; if (wp[c] == not_in) { ungetc (c, s); break; } /* This is easy. */ if (!(flags & SUPPRESS)) { size_t n; /* Convert it into a wide character. */ n = __mbrtowc (wstr, buf, cnt, &cstate); if (n == (size_t) -2) { /* Possibly correct character, just not enough input. */ assert (cnt < MB_CUR_MAX); goto again; } if (n != cnt) encode_error (); ++wstr; if ((flags & MALLOC) && wstr == (wchar_t *) *strptr + strsize) { /* Enlarge the buffer. */ wstr = (wchar_t *) realloc (*strptr, (2 * strsize * sizeof (wchar_t))); if (wstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) realloc (*strptr, ((strsize + 1) * sizeof (wchar_t))); if (wstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((wchar_t *) (*strptr))[strsize - 1] = L'\0'; ++done; conv_error (); } else { *strptr = (char *) wstr; wstr += strsize; ++strsize; } } else { *strptr = (char *) wstr; wstr += strsize; strsize *= 2; } } } } while (--width > 0); if (cnt != 0) /* We stopped in the middle of recognizing another character. That's a problem. */ encode_error (); #endif if (now == read_in) /* We haven't succesfully read any character. */ conv_error (); if (!(flags & SUPPRESS)) { *wstr++ = L'\0'; if ((flags & MALLOC) && wstr - (wchar_t *) *strptr != strsize) { wchar_t *cp = (wchar_t *) realloc (*strptr, ((wstr - (wchar_t *) *strptr) * sizeof(wchar_t))); if (cp != NULL) *strptr = (char *) cp; } ++done; } } else { size_t now = read_in; #ifdef COMPILE_WPRINTF memset (&state, '\0', sizeof (state)); do { wchar_t *runp; size_t n; if (inchar () == WEOF) break; /* Test whether it's in the scanlist. */ runp = tw; while (runp < wp) { if (runp[0] == L'-' && runp[1] != '\0' && runp[1] != ']' && runp != tw && (unsigned int) runp[-1] <= (unsigned int) runp[1]) { /* Match against all characters in between the first and last character of the sequence. */ wchar_t wc; for (wc = runp[-1] + 1; wc < runp[1]; ++wc) if (wc == c) break; if (wc == runp[1] && !not_in) break; if (wc == runp[1] && not_in) { /* The current character is not in the scanset. */ ungetwc (c, s); goto out2; } } else { if (*runp == runp[1] && !not_in) break; if (*runp != runp[1] && not_in) { ungetwc (c ,s); goto out2; } } ++runp; } if (!(flags & SUPPRESS)) { if ((flags & MALLOC) && str + MB_CUR_MAX >= *strptr + strsize) { /* Enlarge the buffer. */ str = (char *) realloc (*strptr, 2 * strsize); if (str == NULL) { /* Can't allocate that much. Last-ditch effort. */ str = (char *) realloc (*strptr, strsize + 1); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ (*strptr)[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = str; str += strsize; ++strsize; } } else { *strptr = str; str += strsize; strsize *= 2; } } } n = wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state); if (n == (size_t) -1) encode_error (); assert (n <= MB_CUR_MAX); str += n; } while (--width > 0); out2: #else do { if (inchar () == EOF) break; if (wp[c] == not_in) { ungetc (c, s); break; } /* This is easy. */ if (!(flags & SUPPRESS)) { *str++ = c; if ((flags & MALLOC) && (char *) str == *strptr + strsize) { /* Enlarge the buffer. */ str = (char *) realloc (*strptr, 2 * strsize); if (str == NULL) { /* Can't allocate that much. Last-ditch effort. */ str = (char *) realloc (*strptr, strsize + 1); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((char *) (*strptr))[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = (char *) str; str += strsize; ++strsize; } } else { *strptr = (char *) str; str += strsize; strsize *= 2; } } } } while (--width > 0); #endif if (now == read_in) /* We haven't succesfully read any character. */ conv_error (); if (!(flags & SUPPRESS)) { #ifdef COMPILE_WPRINTF /* We have to emit the code to get into the intial state. */ char buf[MB_LEN_MAX]; size_t n = wcrtomb (buf, L'\0', &state); if (n > 0 && (flags & MALLOC) && str + n >= *strptr + strsize) { /* Enlarge the buffer. */ str = (char *) realloc (*strptr, (str + n + 1) - *strptr); if (str == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ ((char *) (*strptr))[strsize - 1] = '\0'; ++done; conv_error (); } else { *strptr = (char *) str; str = ((char *) *strptr) + strsize; strsize = (str + n + 1) - *strptr; } } str = __mempcpy (str, buf, n); #endif *str = '\0'; if ((flags & MALLOC) && str - *strptr != strsize) { char *cp = (char *) realloc (*strptr, str - *strptr); if (cp != NULL) *strptr = cp; } ++done; } } break; case L_('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 # ifdef COMPILE_WPRINTF int __vfwscanf (FILE *s, const wchar_t *format, va_list argptr) { return _IO_vfwscanf (s, format, argptr, NULL); } # else int __vfscanf (FILE *s, const char *format, va_list argptr) { return _IO_vfscanf (s, format, argptr, NULL); } # endif #endif #ifdef COMPILE_WPRINTF weak_alias (__vfwscanf, vfwscanf) #else weak_alias (__vfscanf, vfscanf) #endif