/*** *output.c - printf style output to a FILE * * Copyright (c) 1989-2001, Microsoft Corporation. All rights reserved. * *Purpose: * This file contains the code that does all the work for the * printf family of functions. It should not be called directly, only * by the *printf functions. We don't make any assumtions about the * sizes of ints, longs, shorts, or long doubles, but if types do overlap, * we also try to be efficient. We do assume that pointers are the same * size as either ints or longs. * If CPRFLAG is defined, defines _cprintf instead. * **** DOESN'T CURRENTLY DO MTHREAD LOCKING **** * *Revision History: * 06-01-89 PHG Module created * 08-28-89 JCR Added cast to get rid of warning (no object changes) * 02-15-90 GJF Fixed copyright * 03-19-90 GJF Made calling type _CALLTYPE1 and added #include * . * 03-26-90 GJF Changed LOCAL macro to incorporate _CALLTYPE4. Placed * prototype for _output() in internal.h and #include-d * it. * 08-01-90 SBM Compiles cleanly with -W3, moved _cfltcvt_tab and * typedefs DOUBLE and LONGDOUBLE to new header * , formerly named * 09-05-90 SBM First attempt at adding CPRFLAG and code to generate * cprintf. Anything in #ifdef CPRFLAG untested. * Still needs to have locking added for MTHREAD case. * 10-03-90 GJF New-style function declarators. * 01-02-91 SRW Added _WIN32_ conditional for 'C' and 'S' format chars. * 01-16-91 GJF ANSI naming. * 01-16-91 SRW Added #include of maketabc.out (_WIN32_) * 04-09-91 PNT Use the _CRUISER_ mapping for _MAC_ * 04-16-91 SRW Fixed #include of maketabc.out (_WIN32_) * 04-25-91 SRW Made nullstring static * 05-20-91 GJF Moved state table for Win32 inline (_WIN32_). * 09-12-91 JCR Bumped conversion buffer size to be ANSI-compliant * 09-17-91 IHJ Add partial UNICODE (%ws, %wc) support * 09-28-91 GJF Merged with crt32 and crtdll versions. For now, 9-17-91 * change is built only for Win32, not Dosx32 (_WIN32_). * 10-22-91 ETC Complete wchar_t/mb support under _INTL. For now, * 9-28-91 change is additionally under !_INTL. Bug fix: * ints and pointers are longs. * 11-19-91 ETC Added support for _wsprintf, _vwsprintf with WPRFLAG; * added %tc %ts (generic string handling). * 12-05-91 GDP Bug fix: va_arg was used inconsistently for double * 12-19-91 ETC Added some comments on wsprintf optimization, undones; * check return on malloc. * 03-25-92 DJM POSIX support * 04-16-92 KRS Support new ISO {s|f}wprintf with Unicode format string. * 06-08-92 SRW Modified to not use free and malloc for mbtowc conversion. * 06-10-92 KRS Fix glitch in previous change. * 07-17-92 KRS Fix typo which broke WPRFLAG support. * 04-06-93 SKS Replace _CRTAPI* with __cdecl * 04-16-93 SKS Fix bug in 'S' option logic. * 04-26-93 CFW Wide char enable. * 07-14-93 TVB Added Alpha support (quad stuff). * 07-16-93 SRW ALPHA Merge * 07-26-93 GJF Fixed write_multichar and write_string so that they * stop looping when an error occurs. This generalizes * and supplants the fix MattBr made for POSIX only. * 08-17-93 CFW Avoid mapping tchar macros incorrectly if _MBCS * defined. * 11-10-93 GJF Merged in NT SDK version. Deleted Cruiser support * and references to _WIN32_ (the former is obsolete and * the later is assumed). * 03-10-94 GJF Added support for I64 size modifier. * 03-25-94 GJF Rebuilt __lookuptable[]. * 09-05-94 SKS Change "#ifdef" inside comments to "*ifdef" to avoid * problems with CRTL source release process. * 10-02-94 BWT Add _M_PPC definition. * 10-19-94 BWT Reenable %Z and %ws/%wc for NT_BUILD only. * 02-06-94 CFW assert -> _ASSERTE. * 02-23-95 GJF Appended Mac version of source file (somewhat cleaned * up), with appropriate #ifdef-s. Also, replaced * WPRFLAG with _UNICODE. * 05-03-96 GJF Removed NT_BUILD. The extensions for NT (i.e., the 'Z' * descriptor and 'w' modifier) are now in the retail * build. Fixed textlen calculation for %ws. Also, * detab-ed. * 07-25-96 SKS Added initialization of textlen for cases where no valid * format character is found after the % character. * 08-01-96 RDK Add support for %I64 for PMac. * 09-09-96 JWM Local struct "string" renamed to "_count_string" (Orion * 8710). * 02-27-98 RKP Added 64 bit support. * 03-05-98 RKP Expanded pointers to 64 bits on AXP64 and IA64. * 09-17-98 GJF Added support for %I32 and %I modifiers. * 01-04-99 GJF Changes for 64-bit size_t. * 05-17-99 PML Remove all Macintosh support. * 11-03-99 GB VS7#5431. Fixed output() for the case when L format * specifier is used with wprintf * 11-30-99 PML Compile /Wp64 clean. * 02-11-00 GB Added support for unicode console output function * (_cwprintf). * 03-10-00 GB Modified write_char for NULL pointer string in * sprintf. * 11-22-00 PML Wide-char *putwc* functions take a wchar_t, not wint_t. * 07-05-01 BWT Turn off %n formatting for NTSUBSET - it's a security hole * waiting to happen. * 07-15-01 PML Remove all ALPHA, MIPS, and PPC code * 08-11-01 PML Cap precision to fix overrun of 'buffer' (vs7#298618) * *******************************************************************************/ /* temporary work-around for compiler without 64-bit support */ #ifndef _INTEGRAL_MAX_BITS #define _INTEGRAL_MAX_BITS 64 #endif #include #include #include #include #include #include #include #include #include #include #include #include #include /* inline keyword is non-ANSI C7 extension */ #if !defined(_MSC_VER) || defined(__STDC__) #define __inline static #else /* UNDONE: compiler is broken */ #define __inline static #endif #ifdef _MBCS /* always want either Unicode or SBCS for tchar.h */ #undef _MBCS #endif #include /* this macro defines a function which is private and as fast as possible: */ /* for example, in C 6.0, it might be static _fastcall near. */ #define LOCAL(x) static x __cdecl /* int/long/short/pointer sizes */ /* the following should be set depending on the sizes of various types */ #define LONG_IS_INT 1 /* 1 means long is same size as int */ #define SHORT_IS_INT 0 /* 1 means short is same size as int */ #define LONGDOUBLE_IS_DOUBLE 1 /* 1 means long double is same as double */ #if defined (_WIN64) #define PTR_IS_INT 0 /* 1 means ptr is same size as int */ #define PTR_IS_LONG 0 /* 1 means ptr is same size as long */ #define PTR_IS_INT64 1 /* 1 means ptr is same size as int64 */ #else #define PTR_IS_INT 1 /* 1 means ptr is same size as int */ #define PTR_IS_LONG 1 /* 1 means ptr is same size as long */ #define PTR_IS_INT64 0 /* 1 means ptr is same size as int64 */ #endif #if LONG_IS_INT #define get_long_arg(x) (long)get_int_arg(x) #endif #ifndef _UNICODE #if SHORT_IS_INT #define get_short_arg(x) (short)get_int_arg(x) #endif #endif #if PTR_IS_INT #define get_ptr_arg(x) (void *)(intptr_t)get_int_arg(x) #elif PTR_IS_LONG #define get_ptr_arg(x) (void *)(intptr_t)get_long_arg(x) #elif PTR_IS_INT64 #define get_ptr_arg(x) (void *)get_int64_arg(x) #else #error Size of pointer must be same as size of int or long #endif /* CONSTANTS */ /* size of conversion buffer (ANSI-specified minimum is 509) */ #define BUFFERSIZE 512 #define MAXPRECISION BUFFERSIZE #if BUFFERSIZE < CVTBUFSIZE + 6 /*IFSTRIP=IGN*/ /* * Buffer needs to be big enough for default minimum precision * when converting floating point needs bigger buffer, and malloc * fails */ #error Conversion buffer too small for max double. #endif /* flag definitions */ #define FL_SIGN 0x00001 /* put plus or minus in front */ #define FL_SIGNSP 0x00002 /* put space or minus in front */ #define FL_LEFT 0x00004 /* left justify */ #define FL_LEADZERO 0x00008 /* pad with leading zeros */ #define FL_LONG 0x00010 /* long value given */ #define FL_SHORT 0x00020 /* short value given */ #define FL_SIGNED 0x00040 /* signed data given */ #define FL_ALTERNATE 0x00080 /* alternate form requested */ #define FL_NEGATIVE 0x00100 /* value is negative */ #define FL_FORCEOCTAL 0x00200 /* force leading '0' for octals */ #define FL_LONGDOUBLE 0x00400 /* long double value given */ #define FL_WIDECHAR 0x00800 /* wide characters */ #define FL_I64 0x08000 /* __int64 value given */ /* state definitions */ enum STATE { ST_NORMAL, /* normal state; outputting literal chars */ ST_PERCENT, /* just read '%' */ ST_FLAG, /* just read flag character */ ST_WIDTH, /* just read width specifier */ ST_DOT, /* just read '.' */ ST_PRECIS, /* just read precision specifier */ ST_SIZE, /* just read size specifier */ ST_TYPE /* just read type specifier */ }; #define NUMSTATES (ST_TYPE + 1) /* character type values */ enum CHARTYPE { CH_OTHER, /* character with no special meaning */ CH_PERCENT, /* '%' */ CH_DOT, /* '.' */ CH_STAR, /* '*' */ CH_ZERO, /* '0' */ CH_DIGIT, /* '1'..'9' */ CH_FLAG, /* ' ', '+', '-', '#' */ CH_SIZE, /* 'h', 'l', 'L', 'N', 'F', 'w' */ CH_TYPE /* type specifying character */ }; /* static data (read only, since we are re-entrant) */ #if defined(_UNICODE) || defined(CPRFLAG) extern char *__nullstring; /* string to print on null ptr */ extern wchar_t *__wnullstring; /* string to print on null ptr */ #else /* _UNICODE || CPRFLAG */ char *__nullstring = "(null)"; /* string to print on null ptr */ wchar_t *__wnullstring = L"(null)";/* string to print on null ptr */ #endif /* _UNICODE || CPRFLAG */ /* The state table. This table is actually two tables combined into one. */ /* The lower nybble of each byte gives the character class of any */ /* character; while the uper nybble of the byte gives the next state */ /* to enter. See the macros below the table for details. */ /* */ /* The table is generated by maketabc.c -- use this program to make */ /* changes. */ #if defined(_UNICODE) || defined(CPRFLAG) extern const char __lookuptable[]; #else /* _UNICODE/CPRFLAG */ const char __lookuptable[] = { /* ' ' */ 0x06, /* '!' */ 0x00, /* '"' */ 0x00, /* '#' */ 0x06, /* '$' */ 0x00, /* '%' */ 0x01, /* '&' */ 0x00, /* ''' */ 0x00, /* ('' */ 0x10, /* ')' */ 0x00, /* '*' */ 0x03, /* '+' */ 0x06, /* ',' */ 0x00, /* '-' */ 0x06, /* '.' */ 0x02, /* '/' */ 0x10, /* '0' */ 0x04, /* '1' */ 0x45, /* '2' */ 0x45, /* '3' */ 0x45, /* '4' */ 0x05, /* '5' */ 0x05, /* '6' */ 0x05, /* '7' */ 0x05, /* '8' */ 0x05, /* '9' */ 0x35, /* ':' */ 0x30, /* ';' */ 0x00, /* '<' */ 0x50, /* '=' */ 0x00, /* '>' */ 0x00, /* '?' */ 0x00, /* '@' */ 0x00, /* 'A' */ 0x20, /* 'B' */ 0x28, /* 'C' */ 0x38, /* 'D' */ 0x50, /* 'E' */ 0x58, /* 'F' */ 0x07, /* 'G' */ 0x08, /* 'H' */ 0x00, /* 'I' */ 0x37, /* 'J' */ 0x30, /* 'K' */ 0x30, /* 'L' */ 0x57, /* 'M' */ 0x50, /* 'N' */ 0x07, /* 'O' */ 0x00, /* 'P' */ 0x00, /* 'Q' */ 0x20, /* 'R' */ 0x20, /* 'S' */ 0x08, /* 'T' */ 0x00, /* 'U' */ 0x00, /* 'V' */ 0x00, /* 'W' */ 0x00, /* 'X' */ 0x08, /* 'Y' */ 0x60, /* 'Z' */ 0x68, /* '[' */ 0x60, /* '\' */ 0x60, /* ']' */ 0x60, /* '^' */ 0x60, /* '_' */ 0x00, /* '`' */ 0x00, /* 'a' */ 0x70, /* 'b' */ 0x70, /* 'c' */ 0x78, /* 'd' */ 0x78, /* 'e' */ 0x78, /* 'f' */ 0x78, /* 'g' */ 0x08, /* 'h' */ 0x07, /* 'i' */ 0x08, /* 'j' */ 0x00, /* 'k' */ 0x00, /* 'l' */ 0x07, /* 'm' */ 0x00, #ifdef _NTSUBSET_ /* 'n' */ 0x00, // Disable %n format for kernel (ST_NORMAL|CH_OTHER) #else /* 'n' */ 0x08, #endif /* 'o' */ 0x08, /* 'p' */ 0x08, /* 'q' */ 0x00, /* 'r' */ 0x00, /* 's' */ 0x08, /* 't' */ 0x00, /* 'u' */ 0x08, /* 'v' */ 0x00, /* 'w' */ 0x07, /* '*' */ 0x08 }; #endif /* _UNICODE || CPRFLAG */ #define find_char_class(c) \ ((c) < _T(' ') || (c) > _T('x') ? \ CH_OTHER \ : \ __lookuptable[(c)-_T(' ')] & 0xF) #define find_next_state(class, state) \ (__lookuptable[(class) * NUMSTATES + (state)] >> 4) /* * Note: CPRFLAG and _UNICODE cases are currently mutually exclusive. */ /* prototypes */ #ifdef CPRFLAG #define WRITE_CHAR(ch, pnw) write_char(ch, pnw) #define WRITE_MULTI_CHAR(ch, num, pnw) write_multi_char(ch, num, pnw) #define WRITE_STRING(s, len, pnw) write_string(s, len, pnw) #define WRITE_WSTRING(s, len, pnw) write_wstring(s, len, pnw) LOCAL(void) write_char(_TCHAR ch, int *pnumwritten); LOCAL(void) write_multi_char(_TCHAR ch, int num, int *pnumwritten); LOCAL(void) write_string(_TCHAR *string, int len, int *numwritten); LOCAL(void) write_wstring(wchar_t *string, int len, int *numwritten); #else #define WRITE_CHAR(ch, pnw) write_char(ch, stream, pnw) #define WRITE_MULTI_CHAR(ch, num, pnw) write_multi_char(ch, num, stream, pnw) #define WRITE_STRING(s, len, pnw) write_string(s, len, stream, pnw) #define WRITE_WSTRING(s, len, pnw) write_wstring(s, len, stream, pnw) LOCAL(void) write_char(_TCHAR ch, FILE *f, int *pnumwritten); LOCAL(void) write_multi_char(_TCHAR ch, int num, FILE *f, int *pnumwritten); LOCAL(void) write_string(_TCHAR *string, int len, FILE *f, int *numwritten); LOCAL(void) write_wstring(wchar_t *string, int len, FILE *f, int *numwritten); #endif __inline int __cdecl get_int_arg(va_list *pargptr); #ifndef _UNICODE #if !SHORT_IS_INT __inline short __cdecl get_short_arg(va_list *pargptr); #endif #endif #if !LONG_IS_INT __inline long __cdecl get_long_arg(va_list *pargptr); #endif #if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/ __inline __int64 __cdecl get_int64_arg(va_list *pargptr); #endif #ifdef CPRFLAG LOCAL(int) output(const _TCHAR *, va_list); /*** *int _cprintf(format, arglist) - write formatted output directly to console * *Purpose: * Writes formatted data like printf, 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 characters written * *Exceptions: * *******************************************************************************/ #ifdef _UNICODE int __cdecl _cwprintf ( #else int __cdecl _cprintf ( #endif const _TCHAR * format, ... ) { va_list arglist; va_start(arglist, format); return output(format, arglist); } #endif /* CPRFLAG */ /*** *int _output(stream, format, argptr), static int output(format, argptr) * *Purpose: * Output performs printf style output onto a stream. It is called by * printf/fprintf/sprintf/vprintf/vfprintf/vsprintf to so the dirty * work. In multi-thread situations, _output assumes that the given * stream is already locked. * * Algorithm: * The format string is parsed by using a finite state automaton * based on the current state and the current character read from * the format string. Thus, looping is on a per-character basis, * not a per conversion specifier basis. Once the format specififying * character is read, output is performed. * *Entry: * FILE *stream - stream for output * char *format - printf style format string * va_list argptr - pointer to list of subsidiary arguments * *Exit: * Returns the number of characters written, or -1 if an output error * occurs. *ifdef _UNICODE * The wide-character flavour returns the number of wide-characters written. *endif * *Exceptions: * *******************************************************************************/ #ifdef CPRFLAG LOCAL(int) output ( #else #ifdef _UNICODE int __cdecl _woutput ( FILE *stream, #else int __cdecl _output ( FILE *stream, #endif #endif const _TCHAR *format, va_list argptr ) { int hexadd; /* offset to add to number to get 'a'..'f' */ TCHAR ch; /* character just read */ int flags; /* flag word -- see #defines above for flag values */ enum STATE state; /* current state */ enum CHARTYPE chclass; /* class of current character */ int radix; /* current conversion radix */ int charsout; /* characters currently written so far, -1 = IO error */ int fldwidth; /* selected field width -- 0 means default */ int precision; /* selected precision -- -1 means default */ TCHAR prefix[2]; /* numeric prefix -- up to two characters */ int prefixlen; /* length of prefix -- 0 means no prefix */ int capexp; /* non-zero = 'E' exponent signifient, zero = 'e' */ int no_output; /* non-zero = prodcue no output for this specifier */ union { char *sz; /* pointer text to be printed, not zero terminated */ wchar_t *wz; } text; int textlen; /* length of the text in bytes/wchars to be printed. textlen is in multibyte or wide chars if _UNICODE */ union { char sz[BUFFERSIZE]; #ifdef _UNICODE wchar_t wz[BUFFERSIZE]; #endif } buffer; wchar_t wchar; /* temp wchar_t */ int bufferiswide; /* non-zero = buffer contains wide chars already */ #if !defined(_NTSUBSET_) && !defined(_POSIX_) char *heapbuf = NULL; /* non-zero = test.sz using heap buffer to be freed */ #endif textlen = 0; /* no text yet */ charsout = 0; /* no characters written yet */ state = ST_NORMAL; /* starting state */ /* main loop -- loop while format character exist and no I/O errors */ while ((ch = *format++) != _T('\0') && charsout >= 0) { chclass = find_char_class(ch); /* find character class */ state = find_next_state(chclass, state); /* find next state */ /* execute code for each state */ switch (state) { case ST_NORMAL: NORMAL_STATE: /* normal state -- just write character */ #ifdef _UNICODE bufferiswide = 1; #else bufferiswide = 0; if (isleadbyte((int)(unsigned char)ch)) { WRITE_CHAR(ch, &charsout); ch = *format++; _ASSERTE (ch != _T('\0')); /* UNDONE: don't fall off format string */ } #endif /* !_UNICODE */ WRITE_CHAR(ch, &charsout); break; case ST_PERCENT: /* set default value of conversion parameters */ prefixlen = fldwidth = no_output = capexp = 0; flags = 0; precision = -1; bufferiswide = 0; /* default */ break; case ST_FLAG: /* set flag based on which flag character */ switch (ch) { case _T('-'): flags |= FL_LEFT; /* '-' => left justify */ break; case _T('+'): flags |= FL_SIGN; /* '+' => force sign indicator */ break; case _T(' '): flags |= FL_SIGNSP; /* ' ' => force sign or space */ break; case _T('#'): flags |= FL_ALTERNATE; /* '#' => alternate form */ break; case _T('0'): flags |= FL_LEADZERO; /* '0' => pad with leading zeros */ break; } break; case ST_WIDTH: /* update width value */ if (ch == _T('*')) { /* get width from arg list */ fldwidth = get_int_arg(&argptr); if (fldwidth < 0) { /* ANSI says neg fld width means '-' flag and pos width */ flags |= FL_LEFT; fldwidth = -fldwidth; } } else { /* add digit to current field width */ fldwidth = fldwidth * 10 + (ch - _T('0')); } break; case ST_DOT: /* zero the precision, since dot with no number means 0 not default, according to ANSI */ precision = 0; break; case ST_PRECIS: /* update precison value */ if (ch == _T('*')) { /* get precision from arg list */ precision = get_int_arg(&argptr); if (precision < 0) precision = -1; /* neg precision means default */ } else { /* add digit to current precision */ precision = precision * 10 + (ch - _T('0')); } break; case ST_SIZE: /* just read a size specifier, set the flags based on it */ switch (ch) { case _T('l'): flags |= FL_LONG; /* 'l' => long int or wchar_t */ break; case _T('I'): /* * In order to handle the I, I32, and I64 size modifiers, we * depart from the simple deterministic state machine. The * code below scans for characters following the 'I', * and defaults to 64 bit on WIN64 and 32 bit on WIN32 */ #if PTR_IS_INT64 flags |= FL_I64; /* 'I' => __int64 on WIN64 systems */ #endif if ( (*format == _T('6')) && (*(format + 1) == _T('4')) ) { format += 2; flags |= FL_I64; /* I64 => __int64 */ } else if ( (*format == _T('3')) && (*(format + 1) == _T('2')) ) { format += 2; flags &= ~FL_I64; /* I32 => __int32 */ } else if ( (*format == _T('d')) || (*format == _T('i')) || (*format == _T('o')) || (*format == _T('u')) || (*format == _T('x')) || (*format == _T('X')) ) { /* * Nothing further needed. %Id (et al) is * handled just like %d, except that it defaults to 64 bits * on WIN64. Fall through to the next iteration. */ } else { state = ST_NORMAL; goto NORMAL_STATE; } break; case _T('h'): flags |= FL_SHORT; /* 'h' => short int or char */ break; /* UNDONE: support %wc and %ws for now only for compatibility */ case _T('w'): flags |= FL_WIDECHAR; /* 'w' => wide character */ break; } break; case ST_TYPE: /* we have finally read the actual type character, so we */ /* now format and "print" the output. We use a big switch */ /* statement that sets 'text' to point to the text that should */ /* be printed, and 'textlen' to the length of this text. */ /* Common code later on takes care of justifying it and */ /* other miscellaneous chores. Note that cases share code, */ /* in particular, all integer formatting is done in one place. */ /* Look at those funky goto statements! */ switch (ch) { case _T('C'): /* ISO wide character */ if (!(flags & (FL_SHORT|FL_LONG|FL_WIDECHAR))) #ifdef _UNICODE flags |= FL_SHORT; #else flags |= FL_WIDECHAR; /* ISO std. */ #endif /* fall into 'c' case */ case _T('c'): { /* print a single character specified by int argument */ #ifdef _UNICODE bufferiswide = 1; wchar = (wchar_t) get_int_arg(&argptr); if (flags & FL_SHORT) { /* format multibyte character */ /* this is an extension of ANSI */ char tempchar[2]; #ifdef _OUT if (isleadbyte(wchar >> 8)) { tempchar[0] = (wchar >> 8); tempchar[1] = (wchar & 0x00ff); } else #endif /* _OUT */ { tempchar[0] = (char)(wchar & 0x00ff); tempchar[1] = '\0'; } if (mbtowc(buffer.wz,tempchar,MB_CUR_MAX) < 0) { /* ignore if conversion was unsuccessful */ no_output = 1; } } else { buffer.wz[0] = wchar; } text.wz = buffer.wz; textlen = 1; /* print just a single character */ #else /* _UNICODE */ if (flags & (FL_LONG|FL_WIDECHAR)) { wchar = (wchar_t) get_short_arg(&argptr); /* convert to multibyte character */ textlen = wctomb(buffer.sz, wchar); /* check that conversion was successful */ if (textlen < 0) no_output = 1; } else { /* format multibyte character */ /* this is an extension of ANSI */ unsigned short temp; temp = (unsigned short) get_int_arg(&argptr); #ifdef _OUT if (isleadbyte(temp >> 8)) { buffer.sz[0] = temp >> 8; buffer.sz[1] = temp & 0x00ff; textlen = 2; } else #endif /* _OUT */ { buffer.sz[0] = (char) temp; textlen = 1; } } text.sz = buffer.sz; #endif /* _UNICODE */ } break; case _T('Z'): { /* print a Counted String int i; char *p; /* temps */ struct _count_string { short Length; short MaximumLength; char *Buffer; } *pstr; pstr = get_ptr_arg(&argptr); if (pstr == NULL || pstr->Buffer == NULL) { /* null ptr passed, use special string */ text.sz = __nullstring; textlen = (int)strlen(text.sz); } else { if (flags & FL_WIDECHAR) { text.wz = (wchar_t *)pstr->Buffer; textlen = pstr->Length / (int)sizeof(wchar_t); bufferiswide = 1; } else { bufferiswide = 0; text.sz = pstr->Buffer; textlen = pstr->Length; } } } break; case _T('S'): /* ISO wide character string */ #ifndef _UNICODE if (!(flags & (FL_SHORT|FL_LONG|FL_WIDECHAR))) flags |= FL_WIDECHAR; #else if (!(flags & (FL_SHORT|FL_LONG|FL_WIDECHAR))) flags |= FL_SHORT; #endif case _T('s'): { /* print a string -- */ /* ANSI rules on how much of string to print: */ /* all if precision is default, */ /* min(precision, length) if precision given. */ /* prints '(null)' if a null string is passed */ int i; char *p; /* temps */ wchar_t *pwch; /* At this point it is tempting to use strlen(), but */ /* if a precision is specified, we're not allowed to */ /* scan past there, because there might be no null */ /* at all. Thus, we must do our own scan. */ i = (precision == -1) ? INT_MAX : precision; text.sz = get_ptr_arg(&argptr); /* UNDONE: handle '#' case properly */ /* scan for null upto i characters */ #ifdef _UNICODE if (flags & FL_SHORT) { if (text.sz == NULL) /* NULL passed, use special string */ text.sz = __nullstring; p = text.sz; for (textlen=0; textlen MAXPRECISION) precision = MAXPRECISION; if (precision > BUFFERSIZE - CVTBUFSIZE) { #if !defined(_NTSUBSET_) && !defined(_POSIX_) /* conversion will potentially overflow local buffer */ /* so we need to use a heap-allocated buffer. */ heapbuf = (char *)_malloc_crt(CVTBUFSIZE + precision); if (heapbuf != NULL) text.sz = heapbuf; else /* malloc failed, cap precision further */ #endif precision = BUFFERSIZE - CVTBUFSIZE; } #if !LONGDOUBLE_IS_DOUBLE /* do the conversion */ if (flags & FL_LONGDOUBLE) { LONGDOUBLE tmp; tmp=va_arg(argptr, LONGDOUBLE); /* Note: assumes ch is in ASCII range */ _cldcvt(&tmp, text.sz, (char)ch, precision, capexp); } else #endif { DOUBLE tmp; tmp=va_arg(argptr, DOUBLE); /* Note: assumes ch is in ASCII range */ _cfltcvt(&tmp,text.sz, (char)ch, precision, capexp); } /* '#' and precision == 0 means force a decimal point */ if ((flags & FL_ALTERNATE) && precision == 0) _forcdecpt(text.sz); /* 'g' format means crop zero unless '#' given */ if (ch == _T('g') && !(flags & FL_ALTERNATE)) _cropzeros(text.sz); /* check if result was negative, save '-' for later */ /* and point to positive part (this is for '0' padding) */ if (*text.sz == '-') { flags |= FL_NEGATIVE; ++text.sz; } textlen = (int)strlen(text.sz); /* compute length of text */ } break; case _T('d'): case _T('i'): /* signed decimal output */ flags |= FL_SIGNED; radix = 10; goto COMMON_INT; case _T('u'): radix = 10; goto COMMON_INT; case _T('p'): /* write a pointer -- this is like an integer or long */ /* except we force precision to pad with zeros and */ /* output in big hex. */ precision = 2 * sizeof(void *); /* number of hex digits needed */ #if PTR_IS_INT64 flags |= FL_I64; /* assume we're converting an int64 */ #elif !PTR_IS_INT flags |= FL_LONG; /* assume we're converting a long */ #endif /* DROP THROUGH to hex formatting */ case _T('X'): /* unsigned upper hex output */ hexadd = _T('A') - _T('9') - 1; /* set hexadd for uppercase hex */ goto COMMON_HEX; case _T('x'): /* unsigned lower hex output */ hexadd = _T('a') - _T('9') - 1; /* set hexadd for lowercase hex */ /* DROP THROUGH TO COMMON_HEX */ COMMON_HEX: radix = 16; if (flags & FL_ALTERNATE) { /* alternate form means '0x' prefix */ prefix[0] = _T('0'); prefix[1] = (TCHAR)(_T('x') - _T('a') + _T('9') + 1 + hexadd); /* 'x' or 'X' */ prefixlen = 2; } goto COMMON_INT; case _T('o'): /* unsigned octal output */ radix = 8; if (flags & FL_ALTERNATE) { /* alternate form means force a leading 0 */ flags |= FL_FORCEOCTAL; } /* DROP THROUGH to COMMON_INT */ COMMON_INT: { /* This is the general integer formatting routine. */ /* Basically, we get an argument, make it positive */ /* if necessary, and convert it according to the */ /* correct radix, setting text and textlen */ /* appropriately. */ #if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/ unsigned __int64 number; /* number to convert */ int digit; /* ascii value of digit */ __int64 l; /* temp long value */ #else unsigned long number; /* number to convert */ int digit; /* ascii value of digit */ long l; /* temp long value */ #endif /* 1. read argument into l, sign extend as needed */ #if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/ if (flags & FL_I64) l = get_int64_arg(&argptr); else #endif #if !LONG_IS_INT if (flags & FL_LONG) l = get_long_arg(&argptr); else #endif #if !SHORT_IS_INT if (flags & FL_SHORT) { if (flags & FL_SIGNED) l = (short) get_int_arg(&argptr); /* sign extend */ else l = (unsigned short) get_int_arg(&argptr); /* zero-extend*/ } else #endif { if (flags & FL_SIGNED) l = get_int_arg(&argptr); /* sign extend */ else l = (unsigned int) get_int_arg(&argptr); /* zero-extend*/ } /* 2. check for negative; copy into number */ if ( (flags & FL_SIGNED) && l < 0) { number = -l; flags |= FL_NEGATIVE; /* remember negative sign */ } else { number = l; } #if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/ if ( (flags & FL_I64) == 0 ) { /* * Unless printing a full 64-bit value, insure values * here are not in cananical longword format to prevent * the sign extended upper 32-bits from being printed. */ number &= 0xffffffff; } #endif /* 3. check precision value for default; non-default */ /* turns off 0 flag, according to ANSI. */ if (precision < 0) precision = 1; /* default precision */ else { flags &= ~FL_LEADZERO; if (precision > MAXPRECISION) precision = MAXPRECISION; } /* 4. Check if data is 0; if so, turn off hex prefix */ if (number == 0) prefixlen = 0; /* 5. Convert data to ASCII -- note if precision is zero */ /* and number is zero, we get no digits at all. */ text.sz = &buffer.sz[BUFFERSIZE-1]; /* last digit at end of buffer */ while (precision-- > 0 || number != 0) { digit = (int)(number % radix) + '0'; number /= radix; /* reduce number */ if (digit > '9') { /* a hex digit, make it a letter */ digit += hexadd; } *text.sz-- = (char)digit; /* store the digit */ } textlen = (int)((char *)&buffer.sz[BUFFERSIZE-1] - text.sz); /* compute length of number */ ++text.sz; /* text points to first digit now */ /* 6. Force a leading zero if FORCEOCTAL flag set */ if ((flags & FL_FORCEOCTAL) && (text.sz[0] != '0' || textlen == 0)) { *--text.sz = '0'; ++textlen; /* add a zero */ } } break; } /* At this point, we have done the specific conversion, and */ /* 'text' points to text to print; 'textlen' is length. Now we */ /* justify it, put on prefixes, leading zeros, and then */ /* print it. */ if (!no_output) { int padding; /* amount of padding, negative means zero */ if (flags & FL_SIGNED) { if (flags & FL_NEGATIVE) { /* prefix is a '-' */ prefix[0] = _T('-'); prefixlen = 1; } else if (flags & FL_SIGN) { /* prefix is '+' */ prefix[0] = _T('+'); prefixlen = 1; } else if (flags & FL_SIGNSP) { /* prefix is ' ' */ prefix[0] = _T(' '); prefixlen = 1; } } /* calculate amount of padding -- might be negative, */ /* but this will just mean zero */ padding = fldwidth - textlen - prefixlen; /* put out the padding, prefix, and text, in the correct order */ if (!(flags & (FL_LEFT | FL_LEADZERO))) { /* pad on left with blanks */ WRITE_MULTI_CHAR(_T(' '), padding, &charsout); } /* write prefix */ WRITE_STRING(prefix, prefixlen, &charsout); if ((flags & FL_LEADZERO) && !(flags & FL_LEFT)) { /* write leading zeros */ WRITE_MULTI_CHAR(_T('0'), padding, &charsout); } /* write text */ #ifndef _UNICODE if (bufferiswide && (textlen > 0)) { wchar_t *p; int retval, count; char buffer[MB_LEN_MAX+1]; p = text.wz; count = textlen; while (count--) { retval = wctomb(buffer, *p++); if (retval <= 0) break; WRITE_STRING(buffer, retval, &charsout); } } else { WRITE_STRING(text.sz, textlen, &charsout); } #else if (!bufferiswide && textlen > 0) { char *p; int retval, count; p = text.sz; count = textlen; while (count-- > 0) { retval = mbtowc(&wchar, p, MB_CUR_MAX); if (retval <= 0) break; WRITE_CHAR(wchar, &charsout); p += retval; } } else { WRITE_STRING(text.wz, textlen, &charsout); } #endif /* _UNICODE */ if (flags & FL_LEFT) { /* pad on right with blanks */ WRITE_MULTI_CHAR(_T(' '), padding, &charsout); } /* we're done! */ } #if !defined(_NTSUBSET_) && !defined(_POSIX_) if (heapbuf) { _free_crt(heapbuf); heapbuf = NULL; } #endif break; } } return charsout; /* return value = number of characters written */ } /* * Future Optimizations for swprintf: * - Don't free the memory used for converting the buffer to wide chars. * Use realloc if the memory is not sufficient. Free it at the end. */ /*** *void write_char(char ch, int *pnumwritten) *ifdef _UNICODE *void write_char(wchar_t ch, FILE *f, int *pnumwritten) *endif *void write_char(char ch, FILE *f, int *pnumwritten) * *Purpose: * Writes a single character to the given file/console. If no error occurs, * then *pnumwritten is incremented; otherwise, *pnumwritten is set * to -1. * *Entry: * _TCHAR ch - character to write * FILE *f - file to write to * int *pnumwritten - pointer to integer to update with total chars written * *Exit: * No return value. * *Exceptions: * *******************************************************************************/ #ifdef CPRFLAG LOCAL(void) write_char ( _TCHAR ch, int *pnumwritten ) { #ifdef _UNICODE if (_putwch_lk(ch) == WEOF) #else if (_putch_lk(ch) == EOF) #endif //_UNICODE *pnumwritten = -1; else ++(*pnumwritten); } #else LOCAL(void) write_char ( _TCHAR ch, FILE *f, int *pnumwritten ) { if ( (f->_flag & _IOSTRG) && f->_base == NULL) { ++(*pnumwritten); return; } #ifdef _UNICODE if (_putwc_lk(ch, f) == WEOF) #else if (_putc_lk(ch, f) == EOF) #endif //_UNICODE *pnumwritten = -1; else ++(*pnumwritten); } #endif /*** *void write_multi_char(char ch, int num, int *pnumwritten) *ifdef _UNICODE *void write_multi_char(wchar_t ch, int num, FILE *f, int *pnumwritten) *endif *void write_multi_char(char ch, int num, FILE *f, int *pnumwritten) * *Purpose: * Writes num copies of a character to the given file/console. If no error occurs, * then *pnumwritten is incremented by num; otherwise, *pnumwritten is set * to -1. If num is negative, it is treated as zero. * *Entry: * _TCHAR ch - character to write * int num - number of times to write the characters * FILE *f - file to write to * int *pnumwritten - pointer to integer to update with total chars written * *Exit: * No return value. * *Exceptions: * *******************************************************************************/ #ifdef CPRFLAG LOCAL(void) write_multi_char ( _TCHAR ch, int num, int *pnumwritten ) { while (num-- > 0) { write_char(ch, pnumwritten); if (*pnumwritten == -1) break; } } #else /* CPRFLAG */ LOCAL(void) write_multi_char ( _TCHAR ch, int num, FILE *f, int *pnumwritten ) { while (num-- > 0) { write_char(ch, f, pnumwritten); if (*pnumwritten == -1) break; } } #endif /* CPRFLAG */ /*** *void write_string(char *string, int len, int *pnumwritten) *void write_string(char *string, int len, FILE *f, int *pnumwritten) *ifdef _UNICODE *void write_string(wchar_t *string, int len, FILE *f, int *pnumwritten) *endif *void write_wstring(wchar_t *string, int len, int *pnumwritten) *void write_wstring(wchar_t *string, int len, FILE *f, int *pnumwritten) * *Purpose: * Writes a string of the given length to the given file. If no error occurs, * then *pnumwritten is incremented by len; otherwise, *pnumwritten is set * to -1. If len is negative, it is treated as zero. * *Entry: * _TCHAR *string - string to write (NOT null-terminated) * int len - length of string * FILE *f - file to write to * int *pnumwritten - pointer to integer to update with total chars written * *Exit: * No return value. * *Exceptions: * *******************************************************************************/ #ifdef CPRFLAG LOCAL(void) write_string ( _TCHAR *string, int len, int *pnumwritten ) { while (len-- > 0) { write_char(*string++, pnumwritten); if (*pnumwritten == -1) break; } } #else /* CPRFLAG */ LOCAL(void) write_string ( _TCHAR *string, int len, FILE *f, int *pnumwritten ) { if ( (f->_flag & _IOSTRG) && f->_base == NULL) { (*pnumwritten) += len; return; } while (len-- > 0) { write_char(*string++, f, pnumwritten); if (*pnumwritten == -1) break; } } #endif /* CPRFLAG */ /*** *int get_int_arg(va_list *pargptr) * *Purpose: * Gets an int argument off the given argument list and updates *pargptr. * *Entry: * va_list *pargptr - pointer to argument list; updated by function * *Exit: * Returns the integer argument read from the argument list. * *Exceptions: * *******************************************************************************/ __inline int __cdecl get_int_arg ( va_list *pargptr ) { return va_arg(*pargptr, int); } /*** *long get_long_arg(va_list *pargptr) * *Purpose: * Gets an long argument off the given argument list and updates *pargptr. * *Entry: * va_list *pargptr - pointer to argument list; updated by function * *Exit: * Returns the long argument read from the argument list. * *Exceptions: * *******************************************************************************/ #if !LONG_IS_INT __inline long __cdecl get_long_arg ( va_list *pargptr ) { return va_arg(*pargptr, long); } #endif #if _INTEGRAL_MAX_BITS >= 64 /*IFSTRIP=IGN*/ __inline __int64 __cdecl get_int64_arg ( va_list *pargptr ) { return va_arg(*pargptr, __int64); } #endif #ifndef _UNICODE /*** *short get_short_arg(va_list *pargptr) * *Purpose: * Gets a short argument off the given argument list and updates *pargptr. * *** CURRENTLY ONLY USED TO GET A WCHAR_T, IFDEF _INTL *** * *Entry: * va_list *pargptr - pointer to argument list; updated by function * *Exit: * Returns the short argument read from the argument list. * *Exceptions: * *******************************************************************************/ #if !SHORT_IS_INT __inline short __cdecl get_short_arg ( va_list *pargptr ) { return va_arg(*pargptr, short); } #endif #endif