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/***
*output.c - printf style output to a struct w4io** Copyright (c) 1989-1991, 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.**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* 10-03-90 WHB Defined LOCAL(x) to "static x" for local procedures********************************************************************************/
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <stdarg.h>
#include "wchar.h"
#include "w4io.h"
#if CIDBG == 1 || DBG == 1
/* this macro defines a function which is private and as fast as possible: *//* for example, in C 6.0, it might be static _fastcall <type>. */#define LOCAL(x) static x // 100390--WHB
#define NOFLOATS // Win 4 doesn't need floating point
/* int/long/short/pointer sizes */
/* the following should be set depending on the sizes of various types */// FLAT or LARGE model is assumed
# 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 PTR_IS_INT 1 /* 1 means ptr is same size as int */
# define PTR_IS_LONG 0 /* 1 means ptr is same size as long */
#define LONGDOUBLE_IS_DOUBLE 0 /* 1 means long double is same as double */
#if LONG_IS_INT
#define get_long_arg(x) (long)get_int_arg(x)
#endif
#define get_ptr_arg(x) get_void_ptr_arg(x)
/*
#if PTR_IS_INT
#define get_ptr_arg(x) (void *)get_int_arg(x)
#elif PTR_IS_LONG
#define get_ptr_arg(x) (void *)get_long_arg(x)
#else
#error Size of pointer must be same as size of int or long
#endif
*/
#ifndef NOFLOATS
/* These are "fake" double and long doubles to fool the compiler,
so we don't drag in floating point. */typedef struct { char x[sizeof(double)];} DOUBLE;typedef struct { char x[sizeof(long double)];} LONGDOUBLE;#endif
/* CONSTANTS */
//#define BUFFERSIZE CVTBUFSIZE /* buffer size for maximum double conv */
#define BUFFERSIZE 40
/* flag definitions */#define FL_SIGN 0x0001 /* put plus or minus in front */
#define FL_SIGNSP 0x0002 /* put space or minus in front */
#define FL_LEFT 0x0004 /* left justify */
#define FL_LEADZERO 0x0008 /* pad with leading zeros */
#define FL_LONG 0x0010 /* long value given */
#define FL_SHORT 0x0020 /* short value given */
#define FL_SIGNED 0x0040 /* signed data given */
#define FL_ALTERNATE 0x0080 /* alternate form requested */
#define FL_NEGATIVE 0x0100 /* value is negative */
#define FL_FORCEOCTAL 0x0200 /* force leading '0' for octals */
#define FL_LONGDOUBLE 0x0400 /* long double value given */
#define FL_WIDE 0x0800 /* wide character/string given */
#define FL_LONGLONG 0x1000 /* longlong 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' */ CH_TYPE /* type specifying character */};
/* static data (read only, since we are re-entrant) */char *nullstring = "(null)"; /* string to print on null ptr */
/* 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 maketab.c -- use the maketab program to make *//* changes. */
static char lookuptable[] = { 0x06, 0x00, 0x00, 0x06, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x03, 0x06, 0x00, 0x06, 0x02, 0x10, 0x04, 0x45, 0x45, 0x45, 0x05, 0x05, 0x05, 0x05, 0x05, 0x35, 0x30, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x20, 0x28, 0x38, 0x50, 0x58, 0x07, 0x08, 0x00, 0x30, 0x30, 0x30, 0x57, 0x50, 0x07, 0x00, 0x00, 0x20, 0x20, 0x08, 0x00, 0x00, 0x00, 0x00, 0x08, 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x00, 0x00, 0x70, 0x70, 0x78, 0x78, 0x78, 0x78, 0x08, 0x07, 0x08, 0x00, 0x00, 0x07, 0x00, 0x08, 0x08, 0x08, 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x07, 0x08};
enum CHARTYPE find_char_class(char c){ // since I don't know how to run maketab, I make 'I' the same charclass
// as 'd'.
if ( 'I' == c ) c = 'd';
return (c < ' ' || c > 'x') ? CH_OTHER : (lookuptable[(c)-' '] & 0xF);}
#define find_next_state(class, state) \
(lookuptable[(class) * NUMSTATES + (state)] >> 4)
#if !LONG_IS_INT
LOCAL(long) get_long_arg(va_list *pargptr);#endif
LOCAL(int) get_int_arg(va_list *pargptr);LOCAL(__int64) get_int64_arg(va_list *pargptr);/*LOCAL(INT_PTR) get_int_ptr_arg(va_list *pargptr);*/LOCAL(void *) get_void_ptr_arg(va_list *pargptr);LOCAL(void) writestring(char *string, int len, struct w4io *f, int *pcchwritten, int fwide);
#ifndef NOFLOATS
/* extern float convert routines */typedef int (* PFI)();extern PFI _cfltcvt_tab[5];#define _cfltcvt(a,b,c,d,e) (*_cfltcvt_tab[0])(a,b,c,d,e)
#define _cropzeros(a) (*_cfltcvt_tab[1])(a)
#define _fassign(a,b,c) (*_cfltcvt_tab[2])(a,b,c)
#define _forcdecpt(a) (*_cfltcvt_tab[3])(a)
#define _positive(a) (*_cfltcvt_tab[4])(a)
#define _cldcvt(a,b,c,d,e) (*_cfltcvt_tab[5])(a,b,c,d,e)
#endif
/***
*int w4iooutput(f, 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, w4iooutput 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:* struct w4io *f - 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.**Exceptions:********************************************************************************/
int _cdecl w4iooutput(struct w4io *f, const char *format, va_list argptr){ int hexadd; /* offset to add to number to get 'a'..'f' */ char ch; /* character just read */ wchar_t wc; /* wide character temp */ wchar_t *pwc; /* wide character temp pointer */ 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 with -- 0 means default */ int fwide; int precision; /* selected precision -- -1 means default */ char prefix[2]; /* numeric prefix -- up to two characters */ int prefixlen; /* length of prefix -- 0 means no prefix */ int capexp; /* non-zero = 'E' exponent signifiet, zero = 'e' */ int no_output; /* non-zero = prodcue no output for this specifier */ char *text; /* pointer text to be printed, not zero terminated */ int textlen; /* length of the text to be printed */ char buffer[BUFFERSIZE]; /* buffer for conversions */
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++) != '\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 -- just write character */ f->writechar(ch, 1, f, &charsout); break;
case ST_PERCENT: /* set default value of conversion parameters */ prefixlen = fldwidth = no_output = capexp = 0; flags = 0; precision = -1; fwide = 0; break;
case ST_FLAG: /* set flag based on which flag character */ switch (ch) { case '-': flags |= FL_LEFT; /* '-' => left justify */ break; case '+': flags |= FL_SIGN; /* '+' => force sign indicator */ break; case ' ': flags |= FL_SIGNSP; /* ' ' => force sign or space */ break; case '#': flags |= FL_ALTERNATE; /* '#' => alternate form */ break; case '0': flags |= FL_LEADZERO; /* '0' => pad with leading zeros */ break; } break;
case ST_WIDTH: /* update width value */ if (ch == '*') { /* 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 - '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 == '*') { /* 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 - '0'); } break;
case ST_SIZE: /* just read a size specifier, set the flags based on it */ switch (ch) {#if !LONG_IS_INT
case 'l': flags |= FL_LONG; /* 'l' => long int */ break;#endif
#if !LONGDOUBLE_IS_DOUBLE
case 'L': flags |= FL_LONGDOUBLE; /* 'L' => long double */ break;#endif
#if !SHORT_IS_INT
case 'h': flags |= FL_SHORT; /* 'h' => short int */ break;#endif
case 'w': flags |= FL_WIDE; /* '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 doen in one place. */ /* Look at those funky goto statements! */
switch (ch) {
case 'c': { /* print a single character specified by int argument */ wc = (wchar_t) get_int_arg(&argptr); /* get char to print */ * (wchar_t *) buffer = wc; text = buffer; textlen = 1; /* print just a single character */ } break;
case 'S': { /* print a Counted String */
struct 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 = nullstring; textlen = strlen(text); flags &= ~FL_WIDE; } else { text = pstr->Buffer; /* The length field is a count of bytes, not characters. */ if (flags & FL_WIDE) textlen = pstr->Length / sizeof( wchar_t ); else textlen = pstr->Length; if (precision != -1) textlen = min( textlen, precision ); }
} break;
case '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 */
text = get_ptr_arg(&argptr); if (text == NULL) { /* null ptr passed, use special string */ text = nullstring; flags &= ~FL_WIDE; }
/* 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;
/* scan for null upto i characters */ if (flags & FL_WIDE) { pwc = (wchar_t *) text; while (i-- && (wc = *pwc) && (wc & 0x00ff)) { ++pwc; if (wc & 0xff00) { // if high byte set,
break; // error will be indicated
} } textlen = (int)(pwc - (wchar_t *) text); /* length of string */ } else { p = text; while (i-- && *p) { ++p; } textlen = (int)(p - text); /* length of the string */ } } break;
case 'n': { /* write count of characters seen so far into */ /* short/int/long thru ptr read from args */
void *p; /* temp */
p = get_ptr_arg(&argptr);
/* store chars out into short/long/int depending on flags */#if !LONG_IS_INT
if (flags & FL_LONG) *(long *)p = charsout; else#endif
#if !SHORT_IS_INT
if (flags & FL_SHORT) *(short *)p = (short) charsout; else#endif
*(int *)p = charsout;
no_output = 1; /* force no output */ } break;
#ifndef NOFLOATS
case 'E': case 'G': capexp = 1; /* capitalize exponent */ ch += 'a' - 'A'; /* convert format char to lower */ /* DROP THROUGH */ case 'e': case 'f': case 'g': { /* floating point conversion -- we call cfltcvt routines */ /* to do the work for us. */ flags |= FL_SIGNED; /* floating point is signed conversion */ text = buffer; /* put result in buffer */ flags &= ~FL_WIDE; /* 8 bit string */
/* compute the precision value */ if (precision < 0) precision = 6; /* default precision: 6 */ else if (precision == 0 && ch == 'g') precision = 1; /* ANSI specified */
#if !LONGDOUBLE_IS_DOUBLE
/* do the conversion */ if (flags & FL_LONGDOUBLE) { _cldcvt(argptr, text, ch, precision, capexp); va_arg(argptr, LONGDOUBLE); } else#endif
{ _cfltcvt(argptr, text, ch, precision, capexp); va_arg(argptr, DOUBLE); }
/* '#' and precision == 0 means force a decimal point */ if ((flags & FL_ALTERNATE) && precision == 0) _forcdecpt(text);
/* 'g' format means crop zero unless '#' given */ if (ch == 'g' && !(flags & FL_ALTERNATE)) _cropzeros(text);
/* check if result was negative, save '-' for later */ /* and point to positive part (this is for '0' padding) */ if (*text == '-') { flags |= FL_NEGATIVE; ++text; }
textlen = strlen(text); /* compute length of text */ } break;#endif // NOFLOATS
case 'd': case 'i': /* signed decimal output */ flags |= FL_SIGNED; radix = 10; goto COMMON_INT;
case 'I':
// accepted formats:
// %I64d
// %I64u
// %I64x
// %I64X
// %#I64x
// %#I64X
if ( '6' == *format++ && '4' == *format++ ) { if ( 'd' == *format ) { flags |= FL_SIGNED; radix = 10; } else if ( 'u' == *format ) { radix = 10; } else { if ( 'x' == *format ) { radix = 16; hexadd = 'a' - '9' - 1; } else if ( 'X' == *format ) { radix = 16; hexadd = 'A' - '9' - 1; }
if (flags & FL_ALTERNATE) { /* alternate form means '0x' prefix */ prefix[0] = '0'; prefix[1] = (char)('x' - 'a' + '9' + 1 + hexadd); /* 'x' or 'X' */ prefixlen = 2; } }
format++;
flags |= FL_LONGLONG; goto COMMON_INT; } break;
case 'u': radix = 10; goto COMMON_INT;
case '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_INT
flags |= FL_LONG; /* assume we're converting a long */#endif
/* DROP THROUGH to hex formatting */
case 'C': case 'X': /* unsigned upper hex output */ hexadd = 'A' - '9' - 1; /* set hexadd for uppercase hex */ goto COMMON_HEX;
case 'x': /* unsigned lower hex output */ hexadd = 'a' - '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] = '0'; prefix[1] = (char)('x' - 'a' + '9' + 1 + hexadd); /* 'x' or 'X' */ prefixlen = 2; } goto COMMON_INT;
case '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. */
unsigned __int64 number; /* number to convert */ int digit; /* ascii value of digit */ __int64 l; /* temp long value */
/* 1. read argument into l, sign extend as needed */#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) { if ( flags & FL_LONGLONG ) l = get_int64_arg(&argptr); /* sign extend */ else l = get_int_arg(&argptr); /* sign extend */ } else { if ( flags & FL_LONGLONG ) l = (unsigned __int64) get_int64_arg(&argptr); /* zero-extend*/ else l = (unsigned __int64) 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; }
/* 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;
/* 4. Check if data is 0; if so, turn off hex prefix */ if (number == 0) prefixlen = 0;
if ( ! (flags & FL_LONGLONG) ) number = number & 0xffffffff;
/* 5. Convert data to ASCII -- note if precision is zero */ /* and number is zero, we get no digits at all. */
text = &buffer[BUFFERSIZE-1]; // last digit at end of buffer
flags &= ~FL_WIDE; // 8 bit characters
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-- = (char)digit; /* store the digit */ }
textlen = (int)((char *)&buffer[BUFFERSIZE-1] - text); /* compute length of number */ ++text; /* text points to first digit now */
/* 6. Force a leading zero if FORCEOCTAL flag set */ if ((flags & FL_FORCEOCTAL) && (text[0] != '0' || textlen == 0)) { *--text = '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] = '-'; prefixlen = 1; } else if (flags & FL_SIGN) { /* prefix is '+' */ prefix[0] = '+'; prefixlen = 1; } else if (flags & FL_SIGNSP) { /* prefix is ' ' */ prefix[0] = ' '; 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 */ f->writechar(' ', padding, f, &charsout); }
/* write prefix */ writestring(prefix, prefixlen, f, &charsout, 0);
if ((flags & FL_LEADZERO) && !(flags & FL_LEFT)) { /* write leading zeros */ f->writechar('0', padding, f, &charsout); }
/* write text */ writestring(text, textlen, f, &charsout, flags & FL_WIDE);
if (flags & FL_LEFT) { /* pad on right with blanks */ f->writechar(' ', padding, f, &charsout); }
/* we're done! */ } break; } }
return charsout; /* return value = number of characters written */}
/***
*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:********************************************************************************/
LOCAL(int) get_int_arg(va_list *pargptr){ return va_arg(*pargptr, int);}
LOCAL(__int64) get_int64_arg(va_list *pargptr){ return va_arg(*pargptr, __int64);}
LOCAL(void *) get_void_ptr_arg(va_list*pargptr){ return va_arg(*pargptr, void *);}
/*
LOCAL(INT_PTR) get_int_ptr_arg(va_list *pargptr){ return va_arg(*pargptr, INT_PTR);}*/
/***
*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
LOCAL(long) get_long_arg(va_list *pargptr){ return va_arg(*pargptr, long);}#endif
/***
*void writestring(char *string, int len, struct w4io *f, int *pcchwritten, int fwide)**Purpose:* Writes a string of the given length to the given file. If no error occurs,* then *pcchwritten is incremented by len; otherwise, *pcchwritten is set* to -1. If len is negative, it is treated as zero.**Entry:* char *string - string to write (NOT null-terminated)* int len - length of string* struct w4io *f - file to write to* int *pcchwritten - pointer to integer to update with total chars written* int fwide - wide character flag**Exit:* No return value.**Exceptions:********************************************************************************/
LOCAL(void) writestring( char *string, int len, struct w4io *f, int *pcchwritten, int fwide){ wchar_t *pwc;
//printf("string: str=%.*s, len=%d, cch=%d, f=%d\n", len, string, len, *pcchwritten, fwide);
if (fwide) { pwc = (wchar_t *) string; while (len-- > 0) { if (*pwc & 0xff00) { f->writechar('^', 1, f, pcchwritten); } f->writechar((char) *pwc++, 1, f, pcchwritten); } } else { while (len-- > 0) { f->writechar(*string++, 1, f, pcchwritten); } }}
#endif CIDBG == 1 || DBG == 1
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