| /* | |
| * general implementation of scanf used by scanf, sscanf, fscanf, | |
| * _cscanf, wscanf, swscanf and fwscanf | |
| * | |
| * Copyright 1996,1998 Marcus Meissner | |
| * Copyright 1996 Jukka Iivonen | |
| * Copyright 1997,2000, 2003 Uwe Bonnes | |
| * Copyright 2000 Jon Griffiths | |
| * Copyright 2002 Daniel Gudbjartsson | |
| * | |
| * This library is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * This 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 | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with this library; if not, write to the Free Software | |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| */ | |
| #ifdef WIDE_SCANF | |
| #define _CHAR_ MSVCRT_wchar_t | |
| #define _EOF_ MSVCRT_WEOF | |
| #define _EOF_RET MSVCRT_WEOF | |
| #define _ISSPACE_(c) MSVCRT_iswspace(c) | |
| #define _ISDIGIT_(c) MSVCRT_iswdigit(c) | |
| #define _WIDE2SUPPORTED_(c) c /* No conversion needed (wide to wide) */ | |
| #define _CHAR2SUPPORTED_(c) c /* FIXME: convert char to wide char */ | |
| #define _CHAR2DIGIT_(c, base) wchar2digit((c), (base)) | |
| #define _BITMAPSIZE_ 256*256 | |
| #else /* WIDE_SCANF */ | |
| #define _CHAR_ char | |
| #define _EOF_ MSVCRT_EOF | |
| #define _EOF_RET MSVCRT_EOF | |
| #define _ISSPACE_(c) isspace(c) | |
| #define _ISDIGIT_(c) isdigit(c) | |
| #define _WIDE2SUPPORTED_(c) c /* FIXME: convert wide char to char */ | |
| #define _CHAR2SUPPORTED_(c) c /* No conversion needed (char to char) */ | |
| #define _CHAR2DIGIT_(c, base) char2digit((c), (base)) | |
| #define _BITMAPSIZE_ 256 | |
| #endif /* WIDE_SCANF */ | |
| #ifdef CONSOLE | |
| #define _GETC_(file) (consumed++, _getch()) | |
| #define _UNGETC_(nch, file) do { _ungetch(nch); consumed--; } while(0) | |
| #define _FUNCTION_ static int MSVCRT_vcscanf(const char *format, va_list ap) | |
| #else | |
| #ifdef STRING | |
| #undef _EOF_ | |
| #define _EOF_ 0 | |
| #define _GETC_(file) (consumed++, *file++) | |
| #define _UNGETC_(nch, file) do { file--; consumed--; } while(0) | |
| #ifdef WIDE_SCANF | |
| #define _FUNCTION_ static int MSVCRT_vswscanf(const MSVCRT_wchar_t *file, const MSVCRT_wchar_t *format, va_list ap) | |
| #else /* WIDE_SCANF */ | |
| #define _FUNCTION_ static int MSVCRT_vsscanf(const char *file, const char *format, va_list ap) | |
| #endif /* WIDE_SCANF */ | |
| #else /* STRING */ | |
| #ifdef WIDE_SCANF | |
| #define _GETC_(file) (consumed++, MSVCRT_fgetwc(file)) | |
| #define _UNGETC_(nch, file) do { MSVCRT_ungetwc(nch, file); consumed--; } while(0) | |
| #define _FUNCTION_ static int MSVCRT_vfwscanf(MSVCRT_FILE* file, const MSVCRT_wchar_t *format, va_list ap) | |
| #else /* WIDE_SCANF */ | |
| #define _GETC_(file) (consumed++, MSVCRT_fgetc(file)) | |
| #define _UNGETC_(nch, file) do { MSVCRT_ungetc(nch, file); consumed--; } while(0) | |
| #define _FUNCTION_ static int MSVCRT_vfscanf(MSVCRT_FILE* file, const char *format, va_list ap) | |
| #endif /* WIDE_SCANF */ | |
| #endif /* STRING */ | |
| #endif /* CONSOLE */ | |
| /********************************************************************* | |
| * Implemented based on | |
| * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_format_specification_fields_.2d_.scanf_and_wscanf_functions.asp | |
| * Extended by C. Scott Ananian <cananian@alumni.princeton.edu> to handle | |
| * more types of format spec. | |
| */ | |
| _FUNCTION_ { | |
| int rd = 0, consumed = 0; | |
| int nch; | |
| if (!*format) return 0; | |
| #ifndef WIDE_SCANF | |
| #ifdef CONSOLE | |
| TRACE("(%s): \n", debugstr_a(format)); | |
| #else /* CONSOLE */ | |
| #ifdef STRING | |
| TRACE("%s (%s)\n", file, debugstr_a(format)); | |
| #else /* STRING */ | |
| TRACE("%p (%s)\n", file, debugstr_a(format)); | |
| #endif /* STRING */ | |
| #endif /* CONSOLE */ | |
| #endif /* WIDE_SCANF */ | |
| nch = _GETC_(file); | |
| if (nch == _EOF_) return _EOF_RET; | |
| while (*format) { | |
| /* a whitespace character in the format string causes scanf to read, | |
| * but not store, all consecutive white-space characters in the input | |
| * up to the next non-white-space character. One white space character | |
| * in the input matches any number (including zero) and combination of | |
| * white-space characters in the input. */ | |
| if (_ISSPACE_(*format)) { | |
| /* skip whitespace */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| } | |
| /* a format specification causes scanf to read and convert characters | |
| * in the input into values of a specified type. The value is assigned | |
| * to an argument in the argument list. Format specifications have | |
| * the form %[*][width][{h | l | I64 | L}]type */ | |
| else if (*format == '%') { | |
| int st = 0; int suppress = 0; int width = 0; | |
| int base, number_signed; | |
| int h_prefix = 0; | |
| int l_prefix = 0; | |
| int L_prefix = 0; | |
| int w_prefix = 0; | |
| int prefix_finished = 0; | |
| int I64_prefix = 0; | |
| format++; | |
| /* look for leading asterisk, which means 'suppress assignment of | |
| * this field'. */ | |
| if (*format=='*') { | |
| format++; | |
| suppress=1; | |
| } | |
| /* look for width specification */ | |
| while (_ISDIGIT_(*format)) { | |
| width*=10; | |
| width+=*format++ - '0'; | |
| } | |
| if (width==0) width=-1; /* no width spec seen */ | |
| /* read prefix (if any) */ | |
| while (!prefix_finished) { | |
| switch(*format) { | |
| case 'h': h_prefix = 1; break; | |
| case 'l': l_prefix = 1; break; | |
| case 'w': w_prefix = 1; break; | |
| case 'L': L_prefix = 1; break; | |
| case 'I': | |
| if (*(format + 1) == '6' && | |
| *(format + 2) == '4') { | |
| I64_prefix = 1; | |
| format += 2; | |
| } | |
| break; | |
| default: | |
| prefix_finished = 1; | |
| } | |
| if (!prefix_finished) format++; | |
| } | |
| /* read type */ | |
| switch(*format) { | |
| case 'x': | |
| case 'X': /* hexadecimal integer. */ | |
| 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 integer */ | |
| base = 10; number_signed = 1; | |
| number: { | |
| /* read an integer */ | |
| ULONGLONG cur = 0; | |
| int negative = 0; | |
| int seendigit=0; | |
| /* skip initial whitespace */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| /* get sign */ | |
| if (number_signed && (nch == '-' || | |
| nch == '+')) { | |
| negative = (nch=='-'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* look for leading indication of base */ | |
| if (width!=0 && nch == '0') { | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| seendigit=1; | |
| if (width!=0 && (nch=='x' || nch=='X')) { | |
| if (base==0) | |
| base=16; | |
| if (base==16) { | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| seendigit=0; | |
| } | |
| } else if (base==0) | |
| base = 8; | |
| } | |
| /* throw away leading zeros */ | |
| while (width!=0 && nch=='0') { | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| seendigit=1; | |
| } | |
| if (width!=0 && _CHAR2DIGIT_(nch, base)!=-1) { | |
| cur = _CHAR2DIGIT_(nch, base); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| seendigit=1; | |
| } | |
| /* read until no more digits */ | |
| while (width!=0 && (nch!=_EOF_) && _CHAR2DIGIT_(nch, base)!=-1) { | |
| cur = cur*base + _CHAR2DIGIT_(nch, base); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| seendigit=1; | |
| } | |
| /* okay, done! */ | |
| if (!seendigit) break; /* not a valid number */ | |
| st = 1; | |
| if (!suppress) { | |
| #define _SET_NUMBER_(type) *va_arg(ap, type*) = negative ? -cur : cur | |
| if (number_signed) { | |
| if (I64_prefix) _SET_NUMBER_(LONGLONG); | |
| else if (l_prefix) _SET_NUMBER_(long int); | |
| else if (h_prefix) _SET_NUMBER_(short int); | |
| else _SET_NUMBER_(int); | |
| } else { | |
| if (negative) { | |
| WARN("Dropping sign in reading a negative number into an unsigned value"); | |
| negative = 0; | |
| } | |
| if (I64_prefix) _SET_NUMBER_(ULONGLONG); | |
| else if (l_prefix) _SET_NUMBER_(unsigned long int); | |
| else if (h_prefix) | |
| _SET_NUMBER_(unsigned short int); | |
| else _SET_NUMBER_(unsigned int); | |
| } | |
| } | |
| } | |
| break; | |
| case 'e': | |
| case 'E': | |
| case 'f': | |
| case 'g': | |
| case 'G': { /* read a float */ | |
| long double cur = 0; | |
| int negative = 0; | |
| /* skip initial whitespace */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| /* get sign. */ | |
| if (nch == '-' || nch == '+') { | |
| negative = (nch=='-'); | |
| if (width>0) width--; | |
| if (width==0) break; | |
| nch = _GETC_(file); | |
| } | |
| /* get first digit. */ | |
| if ('.' != nch) { | |
| if (!_ISDIGIT_(nch)) break; | |
| cur = (nch - '0'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| /* read until no more digits */ | |
| while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) { | |
| cur = cur*10 + (nch - '0'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| } else { | |
| cur = 0; /* MaxPayneDemo Fix: .8 -> 0.8 */ | |
| } | |
| /* handle decimals */ | |
| if (width!=0 && nch == '.') { | |
| float dec = 1; | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) { | |
| dec /= 10; | |
| cur += dec * (nch - '0'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| } | |
| /* handle exponent */ | |
| if (width!=0 && (nch == 'e' || nch == 'E')) { | |
| int exponent = 0, negexp = 0; | |
| float expcnt; | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| /* possible sign on the exponent */ | |
| if (width!=0 && (nch=='+' || nch=='-')) { | |
| negexp = (nch=='-'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* exponent digits */ | |
| while (width!=0 && (nch!=_EOF_) && _ISDIGIT_(nch)) { | |
| exponent *= 10; | |
| exponent += (nch - '0'); | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* update 'cur' with this exponent. */ | |
| expcnt = negexp ? .1 : 10; | |
| while (exponent!=0) { | |
| if (exponent&1) | |
| cur*=expcnt; | |
| exponent/=2; | |
| expcnt=expcnt*expcnt; | |
| } | |
| } | |
| st = 1; | |
| if (!suppress) { | |
| if (L_prefix) _SET_NUMBER_(long double); | |
| else if (l_prefix) _SET_NUMBER_(double); | |
| else _SET_NUMBER_(float); | |
| } | |
| } | |
| break; | |
| /* According to | |
| * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_scanf_type_field_characters.asp | |
| * 's' reads a character string in a call to fscanf | |
| * and 'S' a wide character string and vice versa in a | |
| * call to fwscanf. The 'h', 'w' and 'l' prefixes override | |
| * this behaviour. 'h' forces reading char * but 'l' and 'w' | |
| * force reading WCHAR. */ | |
| case 's': | |
| if (w_prefix || l_prefix) goto widecharstring; | |
| else if (h_prefix) goto charstring; | |
| #ifdef WIDE_SCANF | |
| else goto widecharstring; | |
| #else /* WIDE_SCANF */ | |
| else goto charstring; | |
| #endif /* WIDE_SCANF */ | |
| case 'S': | |
| if (w_prefix || l_prefix) goto widecharstring; | |
| else if (h_prefix) goto charstring; | |
| #ifdef WIDE_SCANF | |
| else goto charstring; | |
| #else /* WIDE_SCANF */ | |
| else goto widecharstring; | |
| #endif /* WIDE_SCANF */ | |
| charstring: { /* read a word into a char */ | |
| char*str = suppress ? NULL : va_arg(ap, char*); | |
| char*sptr = str; | |
| /* skip initial whitespace */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| /* read until whitespace */ | |
| while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) { | |
| if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch); | |
| st++; | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* terminate */ | |
| if (!suppress) *sptr = 0; | |
| } | |
| break; | |
| widecharstring: { /* read a word into a wchar_t* */ | |
| MSVCRT_wchar_t*str = | |
| suppress ? NULL : va_arg(ap, MSVCRT_wchar_t*); | |
| MSVCRT_wchar_t*sptr = str; | |
| /* skip initial whitespace */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| /* read until whitespace */ | |
| while (width!=0 && (nch!=_EOF_) && !_ISSPACE_(nch)) { | |
| if (!suppress) *sptr++ = _WIDE2SUPPORTED_(nch); | |
| st++; | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* terminate */ | |
| if (!suppress) *sptr = 0; | |
| } | |
| break; | |
| /* 'c' and 'C work analogously to 's' and 'S' as described | |
| * above */ | |
| case 'c': | |
| if (w_prefix || l_prefix) goto widecharacter; | |
| else if (h_prefix) goto character; | |
| #ifdef WIDE_SCANF | |
| else goto widecharacter; | |
| #else /* WIDE_SCANF */ | |
| else goto character; | |
| #endif /* WIDE_SCANF */ | |
| case 'C': | |
| if (w_prefix || l_prefix) goto widecharacter; | |
| else if (h_prefix) goto character; | |
| #ifdef WIDE_SCANF | |
| else goto character; | |
| #else /* WIDE_SCANF */ | |
| else goto widecharacter; | |
| #endif /* WIDE_SCANF */ | |
| character: { /* read single character into char */ | |
| if (nch!=_EOF_) { | |
| if (!suppress) { | |
| char*c = va_arg(ap, char*); | |
| *c = _CHAR2SUPPORTED_(nch); | |
| } | |
| st = 1; | |
| nch = _GETC_(file); | |
| } | |
| } | |
| break; | |
| widecharacter: { /* read single character into a wchar_t */ | |
| if (nch!=_EOF_) { | |
| if (!suppress) { | |
| MSVCRT_wchar_t*c = va_arg(ap, MSVCRT_wchar_t*); | |
| *c = _WIDE2SUPPORTED_(nch); | |
| } | |
| nch = _GETC_(file); | |
| st = 1; | |
| } | |
| } | |
| break; | |
| case 'n': { | |
| if (!suppress) { | |
| int*n = va_arg(ap, int*); | |
| *n = consumed - (nch!=_EOF_); | |
| } | |
| /* This is an odd one: according to the standard, | |
| * "Execution of a %n directive does not increment the | |
| * assignment count returned at the completion of | |
| * execution" even if it wasn't suppressed with the | |
| * '*' flag. The Corrigendum to the standard seems | |
| * to contradict this (comment out the assignment to | |
| * suppress below if you want to implement these | |
| * alternate semantics) but the windows program I'm | |
| * looking at expects the behavior I've coded here | |
| * (which happens to be what glibc does as well). | |
| */ | |
| suppress = 1; | |
| st = 1; | |
| } | |
| break; | |
| case '[': { | |
| _CHAR_ *str = suppress ? NULL : va_arg(ap, _CHAR_*); | |
| _CHAR_ *sptr = str; | |
| RTL_BITMAP bitMask; | |
| ULONG *Mask; | |
| int invert = 0; /* Set if we are NOT to find the chars */ | |
| /* Init our bitmap */ | |
| Mask = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, _BITMAPSIZE_/8); | |
| RtlInitializeBitMap(&bitMask, Mask, _BITMAPSIZE_); | |
| /* Read the format */ | |
| format++; | |
| if(*format == '^') { | |
| invert = 1; | |
| format++; | |
| } | |
| if(*format == ']') { | |
| RtlSetBits(&bitMask, ']', 1); | |
| format++; | |
| } | |
| while(*format && (*format != ']')) { | |
| /* According to: | |
| * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt_scanf_width_specification.asp | |
| * "Note that %[a-z] and %[z-a] are interpreted as equivalent to %[abcde...z]." */ | |
| if((*format == '-') && (*(format + 1) != ']')) { | |
| if ((*(format - 1)) < *(format + 1)) | |
| RtlSetBits(&bitMask, *(format - 1) +1 , *(format + 1) - *(format - 1)); | |
| else | |
| RtlSetBits(&bitMask, *(format + 1) , *(format - 1) - *(format + 1)); | |
| format++; | |
| } else | |
| RtlSetBits(&bitMask, *format, 1); | |
| format++; | |
| } | |
| /* read until char is not suitable */ | |
| while ((width != 0) && (nch != _EOF_)) { | |
| if(!invert) { | |
| if(RtlAreBitsSet(&bitMask, nch, 1)) { | |
| if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch); | |
| } else | |
| break; | |
| } else { | |
| if(RtlAreBitsClear(&bitMask, nch, 1)) { | |
| if (!suppress) *sptr++ = _CHAR2SUPPORTED_(nch); | |
| } else | |
| break; | |
| } | |
| st++; | |
| nch = _GETC_(file); | |
| if (width>0) width--; | |
| } | |
| /* terminate */ | |
| if (!suppress) *sptr = 0; | |
| HeapFree(GetProcessHeap(), 0, Mask); | |
| } | |
| break; | |
| default: | |
| /* From spec: "if a percent sign is followed by a character | |
| * that has no meaning as a format-control character, that | |
| * character and the following characters are treated as | |
| * an ordinary sequence of characters, that is, a sequence | |
| * of characters that must match the input. For example, | |
| * to specify that a percent-sign character is to be input, | |
| * use %%." */ | |
| while ((nch!=_EOF_) && _ISSPACE_(nch)) | |
| nch = _GETC_(file); | |
| if (nch==*format) { | |
| suppress = 1; /* whoops no field to be read */ | |
| st = 1; /* but we got what we expected */ | |
| nch = _GETC_(file); | |
| } | |
| break; | |
| } | |
| if (st && !suppress) rd++; | |
| else if (!st) break; | |
| } | |
| /* a non-white-space character causes scanf to read, but not store, | |
| * a matching non-white-space character. */ | |
| else { | |
| /* check for character match */ | |
| if (nch == *format) { | |
| nch = _GETC_(file); | |
| } else break; | |
| } | |
| format++; | |
| } | |
| if (nch!=_EOF_) { | |
| _UNGETC_(nch, file); | |
| } | |
| TRACE("returning %d\n", rd); | |
| return rd; | |
| } | |
| #undef _CHAR_ | |
| #undef _EOF_ | |
| #undef _EOF_RET | |
| #undef _ISSPACE_ | |
| #undef _ISDIGIT_ | |
| #undef _CHAR2SUPPORTED_ | |
| #undef _WIDE2SUPPORTED_ | |
| #undef _CHAR2DIGIT_ | |
| #undef _GETC_ | |
| #undef _UNGETC_ | |
| #undef _FUNCTION_ | |
| #undef _BITMAPSIZE_ |