/*** *input.c - C formatted input, used by scanf, etc. * * Copyright (c) 1987-1992, Microsoft Corporation. All rights reserved. * *Purpose: * defines _input() to do formatted input; called from scanf(), * etc. functions. This module defines _cscanf() instead when * CPRFLAG is defined -- see makefile in lattice directory. * *Revision History: * 09-26-83 RN author * 11-01-85 TC added %F? %N? %?p %n %i * 11-20-86 SKS enlarged "table" to 256 bytes, to support chars > 0x7F * 12-12-86 SKS changed "s_in()" to pushback whitespace or other delimiter * 03-24-87 BCM Evaluation Issues: * SDS - needs #ifdef SS_NE_DS for the "number" buffer * (for S/M models only) * GD/TS : (not evaluated) * other INIT : (not evaluated) * needs _cfltcvt_init to have been called if * floating-point i/o conversions are being done * TERM - nothing * 06-25-87 PHG added check_stack pragma * 08-31-87 JCR Made %n conform to ANSI standard: (1) %n is supposed to * return the # of chars read so far by the current scanf(), * NOT the total read on the stream since open; (2) %n is NOT * supposed to affect the # of items read that is returned by * scanf(). * 09-24-87 JCR Made cscanf() use the va_ macros (fixes cl warnings). * 11-04-87 JCR Multi-thread support * 11-16-87 JCR Cscanf() now gets _CONIO_LOCK * 12-11-87 JCR Added "_LOAD_DS" to declaration * 02-25-88 JCR If burn() char hits EOF, only return EOF if count==0. * 05-31-88 WAJ Now suports %Fs and %Ns * 06-01-88 PHG Merged DLL and normal versions * 06-08-88 SJM %D no longer means %ld. %[]ABC], %[^]ABC] work. * 06-14-88 SJM Fixed %p, and %F? and %N? code. * SJM Complete re-write of input/_input for 6.00 * 09-15-88 JCR If we match a field but it's not assigned, then are * terminated by EOF, we must return 0 not EOF (ANSI). * 09-25-88 GJF Initial adaption for the 386 * 10-04-88 JCR 386: Removed 'far' keyword * 11-30-88 GJF Cleanup, now specific to 386 * 06-09-89 GJF Propagated fixes of 03-06-89 and 04-05-89 * 11-20-89 GJF Added const attribute to type of format. Also, fixed * copyright. * 12-21-89 GJF Allow null character in scanset * 02-14-90 KRS Fix suppressed-assignment pattern matching. * 03-20-90 GJF Made _cscanf() _CALLTYPE2 and _input() _CALLTYPE1. Added * #include and #include . * 03-26-90 GJF Made static functions _CALLTYPE4. Placed prototype for * _input() in internal.h and #include-d it. Changed type of * arglist from void ** to va_list (to get rid of annoying * warnings). Added #include . Elaborated prototypes * of static functions to get rid of compiler warnings. * 05-21-90 GJF Fixed stack checking pragma syntax. * 07-23-90 SBM Compiles cleanly with -W3, replaced by * , moved _cfltcvt_tab to new header * , formerly named * 08-13-90 SBM Compiles cleanly with -W3 with new build of compiler * 08-27-90 SBM Minor cleanup to agree with CRT7 version * 10-02-90 GJF New-style function declarators. Also, rewrote expr. to * avoid using casts as lvalues. * 10-22-90 GJF Added arglistsave, used to save and restore arglist pointer * without using pointer arithmetic. * 12-28-90 SRW Added _CRUISER_ conditional around check_stack pragma * 01-16-91 GJF ANSI naming. * 03-14-91 GJF Fix to allow processing of %n, even at eof. Fix devised by * DanK of PSS. * 06-19-91 GJF Fixed execution of string, character and scan-set format * directives to avoid problem with line-buffered devices * (C700 bug 1441). * 10-22-91 ETC Int'l dec point; Under _INTL: wchar_t/mb support; fix bug * under !ALLOW_RANGE (never compiled). * 11-15-91 ETC Fixed bug with %f %lf %Lf (bad handling of longone). * 11-19-91 ETC Added support for _wsscanf with WPRFLAG; added %tc %ts. * 06-09-92 KRS Rip out %tc/%ts; conform to new ISO spec. * 08-17-92 KRS Further ISO changes: Add %lc/%ls/%hc/%hs/%C/%S. * 12-23-92 SKS Needed to handle %*n (suppressed storage of byte count) * 02-16-93 CFW Added wide character output for [] scanset. * 06-22-93 KRS Avoid mapping tchar macros incorrectly if _MBCS defined. * *******************************************************************************/ #define ALLOW_RANGE /* allow "%[a-z]"-style scansets */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef _MBCS /* always want either Unicode or SBCS for tchar.h */ #undef _MBCS #endif #include #define HEXTODEC(chr) _hextodec(chr) #define LEFT_BRACKET ('[' | ('a' - 'A')) /* 'lowercase' version */ #ifdef WPRFLAG static wchar_t _CALLTYPE4 _hextodec(wchar_t); #else static int _CALLTYPE4 _hextodec(int); #endif /* * Note: CPRFLAG and WPRFLAG cases are currently mutually exclusive. */ #ifdef CPRFLAG #define INC() (++charcount, _inc()) #define UN_INC(chr) (--charcount, _ungetch_lk(chr)) #define EAT_WHITE() _whiteout(&charcount) static int _CALLTYPE4 _inc(void); static int _CALLTYPE4 _whiteout(int *); #else #define INC() (++charcount, _inc(stream)) #define UN_INC(chr) (--charcount, _un_inc(chr, stream)) #define EAT_WHITE() _whiteout(&charcount, stream) #ifndef WPRFLAG static int _CALLTYPE4 _inc(FILE *); static void _CALLTYPE4 _un_inc(int, FILE *); static int _CALLTYPE4 _whiteout(int *, FILE *); #else static wchar_t _CALLTYPE4 _inc(FILE *); static void _CALLTYPE4 _un_inc(wchar_t, FILE *); static wchar_t _CALLTYPE4 _whiteout(int *, FILE *); #endif /* WPRFLAG */ #endif #ifdef WPRFLAG int _CALLTYPE4 _winput(FILE *, const wchar_t *, va_list); #endif #ifdef CPRFLAG static int _CALLTYPE4 input(const unsigned char *, va_list); /*** *int _cscanf(format, arglist) - read formatted input direct from console * *Purpose: * Reads formatted data like scanf, but uses console I/O functions. * *Entry: * char *format - format string to determine data formats * arglist - list of POINTERS to where to put data * *Exit: * returns number of successfully matched data items (from input) * *Exceptions: * *******************************************************************************/ int _CALLTYPE2 _cscanf ( const char *format, ... ) { va_list arglist; va_start(arglist, format); assert(format != NULL); return input(format,arglist); /* get the input */ } #endif /* CPRFLAG */ #define ASCII 32 /* # of bytes needed to hold 256 bits */ #define SCAN_SHORT 0 /* also for FLOAT */ #define SCAN_LONG 1 /* also for DOUBLE */ #define SCAN_L_DOUBLE 2 /* only for LONG DOUBLE */ #define SCAN_NEAR 0 #define SCAN_FAR 1 #ifdef ALLOW_RANGE static TCHAR sbrackset[] = _T(" \t-\r]"); /* use range-style list */ #else static TCHAR sbrackset[] = _T(" \t\n\v\f\r]"); /* chars defined by isspace() */ #endif static TCHAR cbrackset[] = _T("]"); /*** *int _input(stream, format, arglist), static int input(format, arglist) * *Purpose: * get input items (data items or literal matches) from the input stream * and assign them if appropriate to the items thru the arglist. this * function is intended for internal library use only, not for the user * * The _input entry point is for the normal scanf() functions * The input entry point is used when compiling for _cscanf() [CPRFLAF * defined] and is a static function called only by _cscanf() -- reads from * console. * *Entry: * FILE *stream - file to read from * char *format - format string to determine the data to read * arglist - list of pointer to data items * *Exit: * returns number of items assigned and fills in data items * returns EOF if error or EOF found on stream before 1st data item matched * *Exceptions: * *******************************************************************************/ #ifdef _CRUISER_ #pragma check_stack(on) /* large auto vars -- put stack checking on */ #endif /* ndef _CRUISER_ */ #ifdef CPRFLAG static int _CALLTYPE4 input ( const unsigned char *format, va_list arglist ) #elif WPRFLAG int _CALLTYPE4 _winput ( FILE *stream, const wchar_t *format, va_list arglist ) #else int _CALLTYPE1 _input ( FILE *stream, const unsigned char *format, va_list arglist ) #endif { #ifndef WPRFLAG char table[ASCII]; /* which chars allowed for %[], %s */ char floatstring[CVTBUFSIZE + 1]; /* ASCII buffer for floats */ #else char table[256*ASCII]; wchar_t floatstring[CVTBUFSIZE + 1]; #endif unsigned long number; /* temp hold-value */ void *pointer; /* points to user data receptacle */ void *start; /* indicate non-empty string */ #ifdef WPRFLAG unsigned short *scanptr; /* for building "table" data */ REG2 wchar_t ch; #else wchar_t wctemp; unsigned char *scanptr; /* for building "table" data */ REG2 int ch; #endif int charcount; /* total number of chars read */ REG1 int comchr; /* holds designator type */ int count; /* return value. # of assignments */ int started; /* indicate good number */ int width; /* width of field */ int widthset; /* user has specified width */ /* Neither coerceshort nor farone are need for the 386 */ char done_flag; /* general purpose loop monitor */ char longone; /* 0 = SHORT, 1 = LONG, 2 = L_DOUBLE */ signed char widechar; /* -1 = char, 0 = ????, 1 = wchar_t */ char reject; /* %[^ABC] instead of %[ABC] */ char negative; /* flag for '-' detected */ char suppress; /* don't assign anything */ char match; /* flag: !0 if any fields matched */ va_list arglistsave; /* save arglist value */ char fl_wchar_arg; /* flags wide char/string argument */ #ifdef WPRFLAG #ifdef ALLOW_RANGE unsigned short rngch; /* used while scanning range */ #endif unsigned short last; /* also for %[a-z] */ unsigned short prevchar; /* for %[a-z] */ wchar_t wdecimal; /* wide version of decimal point */ wchar_t *wptr; /* pointer traverses wide floatstring*/ #else #ifdef ALLOW_RANGE unsigned char rngch; /* used while scanning range */ #endif unsigned char last; /* also for %[a-z] */ unsigned char prevchar; /* for %[a-z] */ #endif assert(format != NULL); #ifndef CPRFLAG assert(stream != NULL); #endif /* count = # fields assigned charcount = # chars read match = flag indicating if any fields were matched [Note that we need both count and match. For example, a field may match a format but have assignments suppressed. In this case, match will get set, but 'count' will still equal 0. We need to distinguish 'match vs no-match' when terminating due to EOF.] */ count = charcount = match = 0; while (*format) { if (_istspace((int)*format)) { UN_INC(EAT_WHITE()); /* put first non-space char back */ while ((_istspace)(*++format)); /* NULL */ /* careful: isspace macro may evaluate argument more than once! */ } if (_T('%') == *format) { number = width = widthset = started = done_flag = /* ints are the same size as longs and all pointers are 'near' for the 386 */ prevchar = 0; suppress = negative = reject = 0; widechar = 0; fl_wchar_arg = 0; longone = 1; while (!done_flag) { comchr = *++format; if (_istdigit(comchr)) { ++widthset; width = MUL10(width) + (comchr - _T('0')); } else switch (comchr) { case _T('F') : case _T('N') : /* no way to push NEAR in large model */ break; /* NEAR is default in small model */ case _T('h') : /* set longone to 0 */ --longone; --widechar; /* set widechar = -1 */ break; case _T('L') : /* ++longone; */ ++longone; break; case _T('l') : ++longone; /* NOBREAK */ case _T('w') : ++widechar; /* set widechar = 1 */ break; case _T('*') : ++suppress; break; default: ++done_flag; break; } } if (!suppress) { arglistsave = arglist; pointer = va_arg(arglist,void *); } done_flag = 0; if (!widechar) { /* use case if not explicitly specified */ if ((*format == _T('S')) || (*format == _T('C'))) #ifdef WPRFLAG --widechar; else ++widechar; #else ++widechar; else --widechar; #endif } /* switch to lowercase to allow %E,%G, and to keep the switch table small */ comchr = *format | (_T('a') - _T('A')); if (_T('n') != comchr) if (_T('c') != comchr && LEFT_BRACKET != comchr) ch = EAT_WHITE(); else ch = INC(); #ifdef _POSIX_ if (EOF == ch) { goto error_return; } #endif if (!widthset || width) { switch(comchr) { case _T('c'): /* case _T('C'): */ if (!widthset) { ++widthset; ++width; } if (widechar>0) fl_wchar_arg++; scanptr = cbrackset; --reject; /* set reject to 255 */ goto scanit2; case _T('s'): /* case _T('S'): */ if (widechar>0) fl_wchar_arg++; scanptr = sbrackset; --reject; /* set reject to 255 */ goto scanit2; case LEFT_BRACKET : /* scanset */ if (widechar>0) fl_wchar_arg++; scanptr = (TCHAR *)(++format); if (_T('^') == *scanptr) { ++scanptr; --reject; /* set reject to 255 */ } scanit2: #ifdef WPRFLAG memset(table, 0, ASCII*256); #else memset(table, 0, ASCII); #endif #ifdef ALLOW_RANGE if (LEFT_BRACKET == comchr) if (_T(']') == *scanptr) { prevchar = _T(']'); ++scanptr; table[ _T(']') >> 3] = 1 << (_T(']') & 7); } while (_T(']') != *scanptr) { rngch = *scanptr++; if (_T('-') != rngch || !prevchar || /* first char */ _T(']') == *scanptr) /* last char */ table[(prevchar = rngch) >> 3] |= 1 << (rngch & 7); else { /* handle a-z type set */ rngch = *scanptr++; /* get end of range */ if (prevchar < rngch) /* %[a-z] */ last = rngch; else { /* %[z-a] */ last = prevchar; prevchar = rngch; } for (rngch = prevchar; rngch <= last; ++rngch) table[rngch >> 3] |= 1 << (rngch & 7); prevchar = 0; } } #else if (LEFT_BRACKET == comchr) if (_T(']') == *scanptr) { ++scanptr; table[(prevchar = _T(']')) >> 3] |= 1 << (_T(']') & 7); } while (_T(']') != *scanptr) { table[scanptr >> 3] |= 1 << (scanptr & 7); ++scanptr; } /* code under !ALLOW_RANGE is probably never compiled */ /* and has probably never been tested */ #endif if (!*scanptr) goto error_return; /* trunc'd format string */ /* scanset completed. Now read string */ if (LEFT_BRACKET == comchr) format = scanptr; start = pointer; /* * execute the format directive. that is, scan input * characters until the directive is fulfilled, eof * is reached, or a non-matching character is * encountered. * * it is important not to get the next character * unless that character needs to be tested! other- * wise, reads from line-buffered devices (e.g., * scanf()) would require an extra, spurious, newline * if the first newline completes the current format * directive. */ UN_INC(ch); while ( !widthset || width-- ) { ch = INC(); if ( #ifndef WPRFLAG #ifndef CPRFLAG (EOF != ch) && #endif ((table[ch >> 3] ^ reject) & (1 << (ch & 7))) #else (WEOF != ch) && /* ((ch>>3 >= ASCII) ? reject : */ ((table[ch >> 3] ^ reject) & (1 << (ch & 7))) /* ) */ #endif /* WPRFLAG */ ) { if (!suppress) { #ifndef WPRFLAG if (fl_wchar_arg) { char temp[2]; temp[0] = (char) ch; if (isleadbyte(ch)) temp[1] = (char) INC(); mbtowc(&wctemp, temp, MB_CUR_MAX); *(wchar_t UNALIGNED *)pointer = wctemp; /* do nothing if mbtowc fails */ pointer = (wchar_t *)pointer + 1; } else #else if (fl_wchar_arg) { *(wchar_t UNALIGNED *)pointer = ch; pointer = (wchar_t *)pointer + 1; } else #endif { #ifndef WPRFLAG *(char *)pointer = (char)ch; pointer = (char *)pointer + 1; #else int temp; /* convert wide to multibyte */ temp = wctomb((char *)pointer, ch); /* do nothing if wctomb fails */ pointer = (char *)pointer + temp; #endif } } /* suppress */ else { /* just indicate a match */ start = (TCHAR *)start + 1; } } else { UN_INC(ch); break; } } /* make sure something has been matched and, if assignment is not suppressed, null-terminate output string if comchr != c */ if (start != pointer) { if (!suppress) { ++count; if ('c' != comchr) /* null-terminate strings */ if (fl_wchar_arg) *(wchar_t UNALIGNED *)pointer = L'\0'; else *(char *)pointer = '\0'; } else /*NULL*/; } else goto error_return; break; case _T('i') : /* could be d, o, or x */ comchr = _T('d'); /* use as default */ case _T('x'): if (_T('-') == ch) { ++negative; goto x_incwidth; } else if (_T('+') == ch) { x_incwidth: if (!--width && widthset) ++done_flag; else ch = INC(); } if (_T('0') == ch) { if (_T('x') == (TCHAR)(ch = INC()) || _T('X') == (TCHAR)ch) { ch = INC(); comchr = _T('x'); } else { ++started; if (_T('x') != comchr) comchr = _T('o'); else { /* scanning a hex number that starts */ /* with a 0. push back the character */ /* currently in ch and restore the 0 */ UN_INC(ch); ch = _T('0'); } } } goto getnum; /* NOTREACHED */ case _T('p') : /* force %hp to be treated as %p */ longone = 1; case _T('o') : case _T('u') : case _T('d') : if (_T('-') == ch) { ++negative; goto d_incwidth; } else if (_T('+') == ch) { d_incwidth: if (!--width && widthset) ++done_flag; else ch = INC(); } getnum: while (!done_flag) { if (_T('x') == comchr || _T('p') == comchr) if (_istxdigit(ch)) { number = (number << 4); ch = HEXTODEC(ch); } else ++done_flag; else if (_istdigit(ch)) if (_T('o') == comchr) if (_T('8') > ch) number = (number << 3); else { ++done_flag; } else /* _T('d') == comchr */ number = MUL10(number); else ++done_flag; if (!done_flag) { ++started; number += ch - _T('0'); if (widthset && !--width) ++done_flag; else ch = INC(); } else UN_INC(ch); } /* end of WHILE loop */ if (negative) number = (unsigned long)(-(long)number); if (_T('F')==comchr) /* expected ':' in long pointer */ started = 0; if (started) if (!suppress) { ++count; assign_num: if (longone) *(long UNALIGNED *)pointer = (unsigned long)number; else *(short UNALIGNED *)pointer = (unsigned short)number; } else /*NULL*/; else goto error_return; break; case _T('n') : /* char count, don't inc return value */ number = charcount; if(!suppress) goto assign_num; /* found in number code above */ break; case _T('e') : /* case _T('E') : */ case _T('f') : case _T('g') : /* scan a float */ /* case _T('G') : */ #ifndef WPRFLAG scanptr = floatstring; if (_T('-') == ch) { *scanptr++ = _T('-'); goto f_incwidth; } else if (_T('+') == ch) { f_incwidth: --width; ch = INC(); } if (!widthset || width > CVTBUFSIZE) /* must watch width */ width = CVTBUFSIZE; /* now get integral part */ while (_istdigit(ch) && width--) { ++started; *scanptr++ = (char)ch; ch = INC(); } /* now check for decimal */ if (*__decimal_point == (char)ch && width--) { ch = INC(); *scanptr++ = *__decimal_point; while (_istdigit(ch) && width--) { ++started; *scanptr++ = (char)ch; ch = INC(); } } /* now check for exponent */ if (started && (_T('e') == ch || _T('E') == ch) && width--) { *scanptr++ = 'e'; if (_T('-') == (ch = INC())) { *scanptr++ = '-'; goto f_incwidth2; } else if (_T('+') == ch) { f_incwidth2: if (!width--) ++width; else ch = INC(); } while (_istdigit(ch) && width--) { ++started; *scanptr++ = (char)ch; ch = INC(); } } UN_INC(ch); if (started) if (!suppress) { ++count; *scanptr = '\0'; _fassign( longone-1, pointer , floatstring); } else /*NULL */; else goto error_return; #else /* WPRFLAG */ wptr = floatstring; if (L'-' == ch) { *wptr++ = L'-'; goto f_incwidthw; } else if (L'+' == ch) { f_incwidthw: --width; ch = INC(); } if (!widthset || width > CVTBUFSIZE) width = CVTBUFSIZE; /* now get integral part */ while (iswdigit(ch) && width--) { ++started; *wptr++ = ch; ch = INC(); } /* now check for decimal */ /* convert decimal point to wide-char */ /* assume result is single wide-char */ mbtowc (&wdecimal, __decimal_point, MB_CUR_MAX); if (wdecimal == ch && width--) { ch = INC(); *wptr++ = wdecimal; while (iswdigit(ch) && width--) { ++started; *wptr++ = ch; ch = INC(); } } /* now check for exponent */ if (started && (L'e' == ch || L'E' == ch) && width--) { *wptr++ = L'e'; if (L'-' == (ch = INC())) { *wptr++ = L'-'; goto f_incwidth2w; } else if (L'+' == ch) { f_incwidth2w: if (!width--) ++width; else ch = INC(); } while (iswdigit(ch) && width--) { ++started; *wptr++ = ch; ch = INC(); } } UN_INC(ch); if (started) if (!suppress) { ++count; *wptr = '\0'; { /* convert floatstring to char string */ /* and do the conversion */ size_t cfslength; char *cfloatstring; cfslength =(wptr-floatstring+1)*sizeof(wchar_t); cfloatstring = (char *)malloc (cfslength); wcstombs (cfloatstring, floatstring, cfslength); _fassign( longone-1, pointer , cfloatstring); free (cfloatstring); } } else /*NULL */; else goto error_return; #endif /* WPRFLAG */ break; default: /* either found '%' or something else */ if ((int)*format != (int)ch) { UN_INC(ch); goto error_return; } else match--; /* % found, compensate for inc below */ if (!suppress) arglist = arglistsave; } /* SWITCH */ match++; /* matched a format field - set flag */ } /* WHILE (width) */ else { /* zero-width field in format string */ UN_INC(ch); /* check for input error */ goto error_return; } ++format; /* skip to next char */ } else /* ('%' != *format) */ { if ((int)*format++ != (int)(ch = INC())) { UN_INC(ch); goto error_return; } #ifndef WPRFLAG if (isleadbyte(ch)) { int ch2; if ((int)*format++ != (ch2=INC())) { UN_INC(ch2); UN_INC(ch); goto error_return; } --charcount; /* only count as one character read */ } #endif } #ifndef CPRFLAG if ( (EOF == ch) && ((*format != '%') || (*(format + 1) != 'n')) ) break; #endif } /* WHILE (*format) */ error_return: #ifndef CPRFLAG if (EOF == ch) /* If any fields were matched or assigned, return count */ return ( (count || match) ? count : EOF); else #endif return count; } #ifdef _CRUISER_ #pragma check_stack(off) /* don't bother checking for one local */ #endif /* ndef _CRUISER_ */ /* _hextodec() returns a value of 0-15 and expects a char 0-9, a-f, A-F */ /* _inc() is the one place where we put the actual getc code. */ /* _whiteout() returns the first non-blank character, as defined by isspace() */ #ifndef WPRFLAG static int _CALLTYPE4 _hextodec ( int chr ) { return _istdigit(chr) ? chr : (chr & ~(_T('a') - _T('A'))) - _T('A') + 10 + _T('0'); } #else static TCHAR _CALLTYPE4 _hextodec ( TCHAR chr ) { if (_istdigit(chr)) return chr; if (_istlower(chr)) return (TCHAR)(chr - _T('a') + 10 + _T('0')); else return (TCHAR)(chr - _T('A') + 10 + _T('0')); } #endif #ifdef CPRFLAG static int _CALLTYPE4 _inc ( void ) { return(_getche_lk()); } static int _CALLTYPE4 _whiteout ( REG1 int *counter ) { REG2 int ch; while((_istspace)(ch = (++*counter, _inc()))); return ch; } #elif WPRFLAG /* * Manipulate wide-chars in a file. * A wide-char is hard-coded to be two chars for efficiency. */ static wchar_t _CALLTYPE4 _inc ( REG1 FILE *fileptr ) { return(_getwc_lk(fileptr)); } static void _CALLTYPE4 _un_inc ( wchar_t chr, FILE *fileptr ) { if (WEOF != chr) _ungetwc_lk(chr, fileptr); } static wchar_t _CALLTYPE4 _whiteout ( REG1 int *counter, REG3 FILE *fileptr ) { REG2 wchar_t ch; while((iswspace)(ch = (++*counter, _inc(fileptr)))); return ch; } #else static int _CALLTYPE4 _inc ( REG1 FILE *fileptr ) { return(_getc_lk(fileptr)); } static void _CALLTYPE4 _un_inc ( int chr, FILE *fileptr ) { if (EOF != chr) _ungetc_lk(chr, fileptr); } static int _CALLTYPE4 _whiteout ( REG1 int *counter, REG3 FILE *fileptr ) { REG2 int ch; while((_istspace)(ch = (++*counter, _inc(fileptr)))); return ch; } #endif