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windows-nt/Source/XPSP1/NT/base/crts/crtw32/stdio/input.c

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2020-09-26 03:20:57 -05:00
/***
*input.c - C formatted input, used by scanf, etc.
*
* Copyright (c) 1987-2001, 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. The file cscanf.c defines that symbol
* and then includes this file in order to implement _cscanf().
*
*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 <cruntime.h> and #include <register.h>.
* 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 <string.h>. 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 <assertm.h> by
* <assert.h>, moved _cfltcvt_tab to new header
* <fltintrn.h>, formerly named <struct.h>
* 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.
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
* 04-26-93 CFW Wide char enable.
* 08-17-93 CFW Avoid mapping tchar macros incorrectly if _MBCS defined.
* 09-15-93 CFW Use ANSI conformant "__" names.
* 11-08-93 GJF Merged in NT SDK version (use __unaligned pointer
* casts on MIPS and Alpha. Also, fixed #elif WPRFLAG to
* be #elif defined(WPRFLAG), and removed old CRUISER
* support.
* 12-16-93 CFW Get rid of spurious compiler warnings.
* 03-15-94 GJF Added support for I64 size modifier.
* 04-21-94 GJF Must reinitialize integer64 flag.
* 09-05-94 SKS Remove include of obsolete 16-bit file <sizeptr.h>
* 12-14-94 GJF Changed test for (hex) digits so that when WPRFLAG is
* defined, only zero-extended (hex) digits are
* recognized. This way, the familar arithmetic to convert
* from character rep. to binary integer value will work.
* 01-10-95 CFW Debug CRT allocs.
* 02-06-94 CFW assert -> _ASSERTE.
* 02-22-95 GJF Appended Mac version of source file (somewhat cleaned
* up), with appropriate #ifdef-s. Also, replaced
* WPRFLAG with _UNICODE.
* 08-01-96 RDK For PMac, added __int64 support for _input.
* 02-27-98 RKP Added 64 bit support.
* 07-07-98 RKP Corrected %P formatting for 64 bit.
* 09-21-98 GJF Added support for %I and %I32 modifiers.
* 05-17-99 PML Remove all Macintosh support.
* 10-28-99 PML vs7#10705 Win64 %p was totally busted
* 04-25-00 GB Adding support for _cwprintf.
* 05-31-00 GB Changed scanf to match with standards. problem was
* reading octal or hexa while %d was specified.
* 10-20-00 GB Changed input not to use %[] case for %c and %s.
* 02-19-01 GB Added check for return value of malloc.
* 03-13-01 PML Fix heap leak on multiple %[] specs (vs7#224990)
* 07-07-01 BWT Fix prefix bug - init pointer to a known value
* when handling * formatting.
*
*******************************************************************************/
#define ALLOW_RANGE /* allow "%[a-z]"-style scansets */
/* temporary work-around for compiler without 64-bit support */
#ifndef _INTEGRAL_MAX_BITS
#define _INTEGRAL_MAX_BITS 64
#endif
#include <cruntime.h>
#include <stdio.h>
#include <ctype.h>
#include <cvt.h>
#include <conio.h>
#include <stdarg.h>
#include <string.h>
#include <internal.h>
#include <fltintrn.h>
#include <malloc.h>
#include <mtdll.h>
#include <stdlib.h>
#include <nlsint.h>
#include <dbgint.h>
#ifdef _MBCS /* always want either Unicode or SBCS for tchar.h */
#undef _MBCS
#endif
#include <tchar.h>
#if defined(_NTSUBSET_) || defined(_POSIX_)
#if defined (UNICODE)
#define malloc_crt(x) RtlAllocateHeap(RtlProcessHeap(), 0, x)
#define free_crt(x) RtlFreeHeap(RtlProcessHeap(), 0, x)
#define ALLOC_TABLE 1
#else
#define ALLOC_TABLE 0
#endif
#else
#define ALLOC_TABLE 1
#endif
#define HEXTODEC(chr) _hextodec(chr)
#define LEFT_BRACKET ('[' | ('a' - 'A')) /* 'lowercase' version */
#ifdef _UNICODE
static wchar_t __cdecl _hextodec(wchar_t);
#else
static int __cdecl _hextodec(int);
#endif /* _UNICODE */
#ifdef CPRFLAG
#define INC() (++charcount, _inc())
#define UN_INC(chr) (--charcount, _un_inc(chr))
#define EAT_WHITE() _whiteout(&charcount)
#ifndef _UNICODE
static int __cdecl _inc(void);
static void __cdecl _un_inc(int);
static int __cdecl _whiteout(int *);
#else /* _UNICODE */
static wchar_t __cdecl _inc(void);
static void __cdecl _un_inc(wchar_t);
static wchar_t __cdecl _whiteout(int *);
#endif /* _UNICODE */
#else /* CPRFLAG */
#define INC() (++charcount, _inc(stream))
#define UN_INC(chr) (--charcount, _un_inc(chr, stream))
#define EAT_WHITE() _whiteout(&charcount, stream)
#ifndef _UNICODE
static int __cdecl _inc(FILE *);
static void __cdecl _un_inc(int, FILE *);
static int __cdecl _whiteout(int *, FILE *);
#else /* _UNICODE */
static wchar_t __cdecl _inc(FILE *);
static void __cdecl _un_inc(wchar_t, FILE *);
static wchar_t __cdecl _whiteout(int *, FILE *);
#endif /* _UNICODE */
#endif /* CPRFLAG */
#ifndef _UNICODE
#define _ISDIGIT(chr) isdigit(chr)
#define _ISXDIGIT(chr) isxdigit(chr)
#else
#define _ISDIGIT(chr) ( !(chr & 0xff00) && isdigit( chr & 0x00ff ) )
#define _ISXDIGIT(chr) ( !(chr & 0xff00) && isxdigit( chr & 0x00ff ) )
#endif
#ifdef CPRFLAG
#ifndef _UNICODE
static int __cdecl input(const unsigned char *, va_list);
#else
static int __cdecl input(const wchar_t *, va_list);
#endif
/***
*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:
*
*******************************************************************************/
#ifndef _UNICODE
int __cdecl _cscanf (
const char *format,
#else /* _UNICODE */
int __cdecl _cwscanf (
const wchar_t *format,
#endif /* _UNICODE */
...
)
{
va_list arglist;
va_start(arglist, format);
_ASSERTE(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
#ifndef _UNICODE
#define TABLESIZE ASCII
#else
#define TABLESIZE (ASCII * 256)
#endif
/***
*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 CPRFLAG
#ifndef _UNICODE
static int __cdecl input (
const unsigned char *format,
va_list arglist
)
#else
static int __cdecl input (
const wchar_t *format,
va_list arglist
)
#endif /* _UNICODE */
#else
#if defined(_UNICODE)
int __cdecl _winput (
FILE *stream,
const wchar_t *format,
va_list arglist
)
#else
int __cdecl _input (
FILE *stream,
const unsigned char *format,
va_list arglist
)
#endif /* _UNICODE */
#endif /* CPRFLAG */
{
#ifndef _UNICODE
char floatstring[CVTBUFSIZE + 1]; /* ASCII buffer for floats */
#else
wchar_t floatstring[CVTBUFSIZE + 1];
#endif
unsigned long number; /* temp hold-value */
#if ALLOC_TABLE
char *table = NULL; /* which chars allowed for %[] */
int malloc_flag = 0; /* is "table" allocated on the heap? */
#else
char AsciiTable[TABLESIZE];
char *table = AsciiTable;
#endif
#if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
unsigned __int64 num64; /* temp for 64-bit integers */
#endif
void *pointer; /* points to user data receptacle */
void *start; /* indicate non-empty string */
#ifdef _UNICODE
wchar_t *scanptr; /* for building "table" data */
REG2 wchar_t ch = 0;
#else
wchar_t wctemp;
unsigned char *scanptr; /* for building "table" data */
REG2 int ch = 0;
#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 */
#if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
int integer64; /* 1 for 64-bit integer, 0 otherwise */
#endif
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 _UNICODE
#ifdef ALLOW_RANGE
wchar_t rngch; /* used while scanning range */
#endif
wchar_t last; /* also for %[a-z] */
wchar_t 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
_ASSERTE(format != NULL);
#ifndef CPRFLAG
_ASSERTE(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((_TUCHAR)*format)) {
UN_INC(EAT_WHITE()); /* put first non-space char back */
while ((_istspace)(*++format)); /* NULL */
/* careful: isspace macro may evaluate argument more than once! */
continue;
}
if (_T('%') == *format) {
number = 0;
prevchar = 0;
width = widthset = started = 0;
fl_wchar_arg = done_flag = suppress = negative = reject = 0;
widechar = 0;
longone = 1;
integer64 = 0;
while (!done_flag) {
comchr = *++format;
if (_ISDIGIT((_TUCHAR)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;
#if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
case _T('I'):
if ( (*(format + 1) == _T('6')) &&
(*(format + 2) == _T('4')) )
{
format += 2;
++integer64;
num64 = 0;
break;
}
else if ( (*(format + 1) == _T('3')) &&
(*(format + 2) == _T('2')) )
{
format += 2;
break;
}
else if ( (*(format + 1) == _T('d')) ||
(*(format + 1) == _T('i')) ||
(*(format + 1) == _T('o')) ||
(*(format + 1) == _T('x')) ||
(*(format + 1) == _T('X')) )
{
if (sizeof(void*) == sizeof(__int64))
{
++integer64;
num64 = 0;
}
break;
}
if (sizeof(void*) == sizeof(__int64))
{
++integer64;
num64 = 0;
}
goto DEFAULT_LABEL;
#endif
case _T('L') :
/* ++longone; */
++longone;
break;
case _T('l') :
++longone;
/* NOBREAK */
case _T('w') :
++widechar; /* set widechar = 1 */
break;
case _T('*') :
++suppress;
break;
default:
DEFAULT_LABEL:
++done_flag;
break;
}
}
if (!suppress) {
arglistsave = arglist;
pointer = va_arg(arglist,void *);
} else {
pointer = NULL; // doesn't matter what value we use here - we're only using it as a flag
}
done_flag = 0;
if (!widechar) { /* use case if not explicitly specified */
if ((*format == _T('S')) || (*format == _T('C')))
#ifdef _UNICODE
--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 (_T('n') != comchr)
{
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++;
goto scanit;
case _T('s'):
/* case _T('S'): */
if(widechar > 0)
fl_wchar_arg++;
goto scanit;
case LEFT_BRACKET : /* scanset */
if (widechar>0)
fl_wchar_arg++;
scanptr = (_TCHAR *)(++format);
if (_T('^') == *scanptr) {
++scanptr;
--reject; /* set reject to 255 */
}
/* Allocate "table" on first %[] spec */
#if ALLOC_TABLE
if (table == NULL) {
__try {
table = _alloca(TABLESIZE);
}
__except(EXCEPTION_EXECUTE_HANDLER) {
_resetstkoflw();
table = _malloc_crt(TABLESIZE);
if ( table == NULL)
goto error_return;
malloc_flag = 1;
}
}
#endif
memset(table, 0, TABLESIZE);
#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;
scanit:
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 CPRFLAG
#ifndef _UNICODE
(EOF != ch) &&
#else
(WEOF != ch) &&
#endif /* _UNICODE */
#endif
// char conditions
( ( comchr == _T('c')) ||
// string conditions !isspace()
( ( comchr == _T('s') &&
(!(ch >= _T('\t') && ch <= _T('\r')) &&
ch != _T(' ')))) ||
// BRACKET conditions
( (comchr == LEFT_BRACKET) &&
((table[ch >> 3] ^ reject) & (1 << (ch & 7)))
)
)
)
{
if (!suppress) {
#ifndef _UNICODE
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 _UNICODE
*(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();
if (widthset) {
width -= 2;
if (width < 1)
++done_flag;
}
comchr = _T('x');
} else {
++started;
if (_T('x') != comchr) {
if (widthset && !--width)
++done_flag;
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;
#ifdef _WIN64
/* force %p to be 64 bit in WIN64 */
++integer64;
num64 = 0;
#endif
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:
#if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
if ( integer64 ) {
while (!done_flag) {
if (_T('x') == comchr || _T('p') == comchr)
if (_ISXDIGIT(ch)) {
num64 <<= 4;
ch = HEXTODEC(ch);
}
else
++done_flag;
else if (_ISDIGIT(ch))
if (_T('o') == comchr)
if (_T('8') > ch)
num64 <<= 3;
else {
++done_flag;
}
else /* _T('d') == comchr */
num64 = MUL10(num64);
else
++done_flag;
if (!done_flag) {
++started;
num64 += ch - _T('0');
if (widthset && !--width)
++done_flag;
else
ch = INC();
} else
UN_INC(ch);
} /* end of WHILE loop */
if (negative)
num64 = (unsigned __int64 )(-(__int64)num64);
}
else {
#endif
while (!done_flag) {
if (_T('x') == comchr || _T('p') == comchr)
if (_ISXDIGIT(ch)) {
number = (number << 4);
ch = HEXTODEC(ch);
}
else
++done_flag;
else if (_ISDIGIT(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 _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
}
#endif
if (_T('F')==comchr) /* expected ':' in long pointer */
started = 0;
if (started)
if (!suppress) {
++count;
assign_num:
#if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/
if ( integer64 )
*(__int64 UNALIGNED *)pointer = (unsigned __int64)num64;
else
#endif
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 _UNICODE
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 (_ISDIGIT(ch) && width--) {
++started;
*scanptr++ = (char)ch;
ch = INC();
}
/* now check for decimal */
if (*___decimal_point == (char)ch && width--) {
ch = INC();
*scanptr++ = *___decimal_point;
while (_ISDIGIT(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 (_ISDIGIT(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 /* _UNICODE */
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 (_ISDIGIT(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 (_ISDIGIT(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 (_ISDIGIT(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 =(size_t)(wptr-floatstring+1)*sizeof(wchar_t);
if ((cfloatstring = (char *)_malloc_crt (cfslength)) == NULL)
goto error_return;
wcstombs (cfloatstring, floatstring, cfslength);
_fassign( longone-1, pointer , cfloatstring);
_free_crt (cfloatstring);
}
} else /*NULL */;
else
goto error_return;
#endif /* _UNICODE */
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 _UNICODE
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:
#if ALLOC_TABLE
if (malloc_flag == 1)
_free_crt(table);
#endif
#ifndef CPRFLAG
if (EOF == ch)
/* If any fields were matched or assigned, return count */
return ( (count || match) ? count : EOF);
else
#endif
return count;
}
/* _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 _UNICODE
static int __cdecl _hextodec (
int chr
)
{
return _ISDIGIT(chr) ? chr : (chr & ~(_T('a') - _T('A'))) - _T('A') + 10 + _T('0');
}
#else
static _TCHAR __cdecl _hextodec (
_TCHAR chr
)
{
if (_ISDIGIT(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
#ifndef _UNICODE
static int __cdecl _inc (
void
)
{
return(_getche_lk());
}
static void __cdecl _un_inc (
int chr
)
{
if (EOF != chr)
_ungetch_lk(chr);
}
static int __cdecl _whiteout (
REG1 int *counter
)
{
REG2 int ch;
while((_istspace)(ch = (++*counter, _inc())));
return ch;
}
#else /* _UNICODE */
static wchar_t __cdecl _inc (
void
)
{
return(_getwche_lk());
}
static void __cdecl _un_inc (
wchar_t chr
)
{
if (WEOF != chr)
_ungetwch_lk(chr);
}
static wchar_t __cdecl _whiteout (
REG1 int *counter
)
{
REG2 wchar_t ch;
while((iswspace)(ch = (++*counter, _inc())));
return ch;
}
#endif
#else /* CPRFLAG */
#ifdef _UNICODE
/*
* Manipulate wide-chars in a file.
* A wide-char is hard-coded to be two chars for efficiency.
*/
static wchar_t __cdecl _inc (
REG1 FILE *fileptr
)
{
return(_getwc_lk(fileptr));
}
static void __cdecl _un_inc (
wchar_t chr,
FILE *fileptr
)
{
if (WEOF != chr)
_ungetwc_lk(chr, fileptr);
}
static wchar_t __cdecl _whiteout (
REG1 int *counter,
REG3 FILE *fileptr
)
{
REG2 wchar_t ch;
while((iswspace)(ch = (++*counter, _inc(fileptr))));
return ch;
}
#else /* _UNICODE */
static int __cdecl _inc (
REG1 FILE *fileptr
)
{
return(_getc_lk(fileptr));
}
static void __cdecl _un_inc (
int chr,
FILE *fileptr
)
{
if (EOF != chr)
_ungetc_lk(chr, fileptr);
}
static int __cdecl _whiteout (
REG1 int *counter,
REG3 FILE *fileptr
)
{
REG2 int ch;
while((_istspace)(ch = (++*counter, _inc(fileptr))));
return ch;
}
#endif /* _UNICODE */
#endif /* CPRFLAG */
Reference in a new issue Copy permalink