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Diffstat (limited to 'mit-pthreads/stdio/xprintf.c')
| -rw-r--r-- | mit-pthreads/stdio/xprintf.c | 883 |
1 files changed, 0 insertions, 883 deletions
diff --git a/mit-pthreads/stdio/xprintf.c b/mit-pthreads/stdio/xprintf.c deleted file mode 100644 index 668e8bc0605..00000000000 --- a/mit-pthreads/stdio/xprintf.c +++ /dev/null @@ -1,883 +0,0 @@ -/* -** It turns out that the printf functions in the stock MIT pthread library -** is busted. It isn't thread safe. If two threads try to do a printf -** of a floating point value at the same time, a core-dump might result. -** So this code is substituted. -*/ -/* -** NAME: $Source$ -** VERSION: $Revision$ -** DATE: $Date$ -** -** ONELINER: A replacement for formatted printing programs. -** -** COPYRIGHT: -** Copyright (c) 1990 by D. Richard Hipp. This code is an original -** work and has been prepared without reference to any prior -** implementations of similar functions. No part of this code is -** subject to licensing restrictions of any telephone company or -** university. -** -** This copyright was released and the code placed in the public domain -** by the author, D. Richard Hipp, on October 3, 1996. -** -** DESCRIPTION: -** This program is an enhanced replacement for the "printf" programs -** found in the standard library. The following enhancements are -** supported: -** -** + Additional functions. The standard set of "printf" functions -** includes printf, fprintf, sprintf, vprintf, vfprintf, and -** vsprintf. This module adds the following: -** -** * snprintf -- Works like sprintf, but has an extra argument -** which is the size of the buffer written to. -** -** * mprintf -- Similar to sprintf. Writes output to memory -** obtained from mem_alloc. -** -** * xprintf -- Calls a function to dispose of output. -** -** * nprintf -- No output, but returns the number of characters -** that would have been output by printf. -** -** * A v- version (ex: vsnprintf) of every function is also -** supplied. -** -** + A few extensions to the formatting notation are supported: -** -** * The "=" flag (similar to "-") causes the output to be -** be centered in the appropriately sized field. -** -** * The %b field outputs an integer in binary notation. -** -** * The %c field now accepts a precision. The character output -** is repeated by the number of times the precision specifies. -** -** * The %' field works like %c, but takes as its character the -** next character of the format string, instead of the next -** argument. For example, printf("%.78'-") prints 78 minus -** signs, the same as printf("%.78c",'-'). -** -** + When compiled using GCC on a SPARC, this version of printf is -** faster than the library printf for SUN OS 4.1. -** -** + All functions are fully reentrant. -** -*/ -/* -** Undefine COMPATIBILITY to make some slight changes in the way things -** work. I think the changes are an improvement, but they are not -** backwards compatible. -*/ -/* #define COMPATIBILITY / * Compatible with SUN OS 4.1 */ -#include <stdio.h> -#include <stdarg.h> -#include <ctype.h> -#include <math.h> -#include <stdlib.h> -#include <string.h> -/* -** The maximum number of digits of accuracy in a floating-point conversion. -*/ -#define MAXDIG 20 - -/* -** Conversion types fall into various categories as defined by the -** following enumeration. -*/ -enum e_type { /* The type of the format field */ - RADIX, /* Integer types. %d, %x, %o, and so forth */ - FLOAT, /* Floating point. %f */ - EXP, /* Exponentional notation. %e and %E */ - GENERIC, /* Floating or exponential, depending on exponent. %g */ - SIZE, /* Return number of characters processed so far. %n */ - STRING, /* Strings. %s */ - PERCENT, /* Percent symbol. %% */ - CHAR, /* Characters. %c */ - ERROR, /* Used to indicate no such conversion type */ -/* The rest are extensions, not normally found in printf() */ - CHARLIT, /* Literal characters. %' */ - SEEIT, /* Strings with visible control characters. %S */ - MEM_STRING, /* A string which should be deleted after use. %z */ - ORDINAL, /* 1st, 2nd, 3rd and so forth */ -}; - -/* -** Each builtin conversion character (ex: the 'd' in "%d") is described -** by an instance of the following structure -*/ -typedef struct s_info { /* Information about each format field */ - int fmttype; /* The format field code letter */ - int base; /* The base for radix conversion */ - char *charset; /* The character set for conversion */ - int flag_signed; /* Is the quantity signed? */ - char *prefix; /* Prefix on non-zero values in alt format */ - enum e_type type; /* Conversion paradigm */ -} info; - -/* -** The following table is searched linearly, so it is good to put the -** most frequently used conversion types first. -*/ -static info fmtinfo[] = { - { 'd', 10, "0123456789", 1, 0, RADIX, }, - { 's', 0, 0, 0, 0, STRING, }, - { 'S', 0, 0, 0, 0, SEEIT, }, - { 'z', 0, 0, 0, 0, MEM_STRING, }, - { 'c', 0, 0, 0, 0, CHAR, }, - { 'o', 8, "01234567", 0, "0", RADIX, }, - { 'u', 10, "0123456789", 0, 0, RADIX, }, - { 'x', 16, "0123456789abcdef", 0, "x0", RADIX, }, - { 'X', 16, "0123456789ABCDEF", 0, "X0", RADIX, }, - { 'r', 10, "0123456789", 0, 0, ORDINAL, }, - { 'f', 0, 0, 1, 0, FLOAT, }, - { 'e', 0, "e", 1, 0, EXP, }, - { 'E', 0, "E", 1, 0, EXP, }, - { 'g', 0, "e", 1, 0, GENERIC, }, - { 'G', 0, "E", 1, 0, GENERIC, }, - { 'i', 10, "0123456789", 1, 0, RADIX, }, - { 'n', 0, 0, 0, 0, SIZE, }, - { 'S', 0, 0, 0, 0, SEEIT, }, - { '%', 0, 0, 0, 0, PERCENT, }, - { 'b', 2, "01", 0, "b0", RADIX, }, /* Binary notation */ - { 'p', 10, "0123456789", 0, 0, RADIX, }, /* Pointers */ - { '\'', 0, 0, 0, 0, CHARLIT, }, /* Literal char */ -}; -#define NINFO (sizeof(fmtinfo)/sizeof(info)) /* Size of the fmtinfo table */ - -/* -** If NOFLOATINGPOINT is defined, then none of the floating point -** conversions will work. -*/ -#ifndef NOFLOATINGPOINT -/* -** "*val" is a double such that 0.1 <= *val < 10.0 -** Return the ascii code for the leading digit of *val, then -** multiply "*val" by 10.0 to renormalize. -** -** Example: -** input: *val = 3.14159 -** output: *val = 1.4159 function return = '3' -** -** The counter *cnt is incremented each time. After counter exceeds -** 16 (the number of significant digits in a 64-bit float) '0' is -** always returned. -*/ -static int getdigit(long double *val, int *cnt){ - int digit; - long double d; - if( (*cnt)++ >= MAXDIG ) return '0'; - digit = (int)*val; - d = digit; - digit += '0'; - *val = (*val - d)*10.0; - return digit; -} -#endif - -/* -** Setting the size of the BUFFER involves trade-offs. No %d or %f -** conversion can have more than BUFSIZE characters. If the field -** width is larger than BUFSIZE, it is silently shortened. On the -** other hand, this routine consumes more stack space with larger -** BUFSIZEs. If you have some threads for which you want to minimize -** stack space, you should keep BUFSIZE small. -*/ -#define BUFSIZE 100 /* Size of the output buffer */ - -/* -** The root program. All variations call this core. -** -** INPUTS: -** func This is a pointer to a function taking three arguments -** 1. A pointer to the list of characters to be output -** (Note, this list is NOT null terminated.) -** 2. An integer number of characters to be output. -** (Note: This number might be zero.) -** 3. A pointer to anything. Same as the "arg" parameter. -** -** arg This is the pointer to anything which will be passed as the -** third argument to "func". Use it for whatever you like. -** -** fmt This is the format string, as in the usual print. -** -** ap This is a pointer to a list of arguments. Same as in -** vfprint. -** -** OUTPUTS: -** The return value is the total number of characters sent to -** the function "func". Returns -1 on a error. -** -** Note that the order in which automatic variables are declared below -** seems to make a big difference in determining how fast this beast -** will run. -*/ -static int vxprintf(func,arg,format,ap) - void (*func)(char*,int,void*); - void *arg; - const char *format; - va_list ap; -{ - register const char *fmt; /* The format string. */ - register int c; /* Next character in the format string */ - register char *bufpt; /* Pointer to the conversion buffer */ - register int precision; /* Precision of the current field */ - register int length; /* Length of the field */ - register int idx; /* A general purpose loop counter */ - int count; /* Total number of characters output */ - int width; /* Width of the current field */ - int flag_leftjustify; /* True if "-" flag is present */ - int flag_plussign; /* True if "+" flag is present */ - int flag_blanksign; /* True if " " flag is present */ - int flag_alternateform; /* True if "#" flag is present */ - int flag_zeropad; /* True if field width constant starts with zero */ - int flag_long; /* True if "l" flag is present */ - int flag_center; /* True if "=" flag is present */ - unsigned long longvalue; /* Value for integer types */ - long double realvalue; /* Value for real types */ - info *infop; /* Pointer to the appropriate info structure */ - char buf[BUFSIZE]; /* Conversion buffer */ - char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */ - int errorflag = 0; /* True if an error is encountered */ - enum e_type xtype; /* Conversion paradigm */ - char *zMem; /* String to be freed */ - static char spaces[] = - " "; -#define SPACESIZE (sizeof(spaces)-1) -#ifndef NOFLOATINGPOINT - int exp; /* exponent of real numbers */ - long double rounder; /* Used for rounding floating point values */ - int flag_dp; /* True if decimal point should be shown */ - int flag_rtz; /* True if trailing zeros should be removed */ - int flag_exp; /* True to force display of the exponent */ - int nsd; /* Number of significant digits returned */ -#endif - - fmt = format; /* Put in a register for speed */ - count = length = 0; - bufpt = 0; - for(; (c=(*fmt))!=0; ++fmt){ - if( c!='%' ){ - register int amt; - bufpt = (char *)fmt; - amt = 1; - while( (c=(*++fmt))!='%' && c!=0 ) amt++; - (*func)(bufpt,amt,arg); - count += amt; - if( c==0 ) break; - } - if( (c=(*++fmt))==0 ){ - errorflag = 1; - (*func)("%",1,arg); - count++; - break; - } - /* Find out what flags are present */ - flag_leftjustify = flag_plussign = flag_blanksign = - flag_alternateform = flag_zeropad = flag_center = 0; - do{ - switch( c ){ - case '-': flag_leftjustify = 1; c = 0; break; - case '+': flag_plussign = 1; c = 0; break; - case ' ': flag_blanksign = 1; c = 0; break; - case '#': flag_alternateform = 1; c = 0; break; - case '0': flag_zeropad = 1; c = 0; break; - case '=': flag_center = 1; c = 0; break; - default: break; - } - }while( c==0 && (c=(*++fmt))!=0 ); - if( flag_center ) flag_leftjustify = 0; - /* Get the field width */ - width = 0; - if( c=='*' ){ - width = va_arg(ap,int); - if( width<0 ){ - flag_leftjustify = 1; - width = -width; - } - c = *++fmt; - }else{ - while( isdigit(c) ){ - width = width*10 + c - '0'; - c = *++fmt; - } - } - if( width > BUFSIZE-10 ){ - width = BUFSIZE-10; - } - /* Get the precision */ - if( c=='.' ){ - precision = 0; - c = *++fmt; - if( c=='*' ){ - precision = va_arg(ap,int); -#ifndef COMPATIBILITY - /* This is sensible, but SUN OS 4.1 doesn't do it. */ - if( precision<0 ) precision = -precision; -#endif - c = *++fmt; - }else{ - while( isdigit(c) ){ - precision = precision*10 + c - '0'; - c = *++fmt; - } - } - /* Limit the precision to prevent overflowing buf[] during conversion */ - if( precision>BUFSIZE-40 ) precision = BUFSIZE-40; - }else{ - precision = -1; - } - /* Get the conversion type modifier */ - if( c=='l' ){ - flag_long = 1; - c = *++fmt; - }else{ - flag_long = 0; - } - /* Fetch the info entry for the field */ - infop = 0; - for(idx=0; idx<NINFO; idx++){ - if( c==fmtinfo[idx].fmttype ){ - infop = &fmtinfo[idx]; - break; - } - } - /* No info entry found. It must be an error. */ - if( infop==0 ){ - xtype = ERROR; - }else{ - xtype = infop->type; - } - - /* - ** At this point, variables are initialized as follows: - ** - ** flag_alternateform TRUE if a '#' is present. - ** flag_plussign TRUE if a '+' is present. - ** flag_leftjustify TRUE if a '-' is present or if the - ** field width was negative. - ** flag_zeropad TRUE if the width began with 0. - ** flag_long TRUE if the letter 'l' (ell) prefixed - ** the conversion character. - ** flag_blanksign TRUE if a ' ' is present. - ** width The specified field width. This is - ** always non-negative. Zero is the default. - ** precision The specified precision. The default - ** is -1. - ** xtype The class of the conversion. - ** infop Pointer to the appropriate info struct. - */ - switch( xtype ){ - case ORDINAL: - case RADIX: - if( flag_long ) longvalue = va_arg(ap,long); - else longvalue = va_arg(ap,int); -#ifdef COMPATIBILITY - /* For the format %#x, the value zero is printed "0" not "0x0". - ** I think this is stupid. */ - if( longvalue==0 ) flag_alternateform = 0; -#else - /* More sensible: turn off the prefix for octal (to prevent "00"), - ** but leave the prefix for hex. */ - if( longvalue==0 && infop->base==8 ) flag_alternateform = 0; -#endif - if( infop->flag_signed ){ - if( *(long*)&longvalue<0 ){ - longvalue = -*(long*)&longvalue; - prefix = '-'; - }else if( flag_plussign ) prefix = '+'; - else if( flag_blanksign ) prefix = ' '; - else prefix = 0; - }else prefix = 0; - if( flag_zeropad && precision<width-(prefix!=0) ){ - precision = width-(prefix!=0); - } - bufpt = &buf[BUFSIZE]; - if( xtype==ORDINAL ){ - long a,b; - a = longvalue%10; - b = longvalue%100; - bufpt -= 2; - if( a==0 || a>3 || (b>10 && b<14) ){ - bufpt[0] = 't'; - bufpt[1] = 'h'; - }else if( a==1 ){ - bufpt[0] = 's'; - bufpt[1] = 't'; - }else if( a==2 ){ - bufpt[0] = 'n'; - bufpt[1] = 'd'; - }else if( a==3 ){ - bufpt[0] = 'r'; - bufpt[1] = 'd'; - } - } - { - register char *cset; /* Use registers for speed */ - register int base; - cset = infop->charset; - base = infop->base; - do{ /* Convert to ascii */ - *(--bufpt) = cset[longvalue%base]; - longvalue = longvalue/base; - }while( longvalue>0 ); - } - length = (int)(&buf[BUFSIZE]-bufpt); - for(idx=precision-length; idx>0; idx--){ - *(--bufpt) = '0'; /* Zero pad */ - } - if( prefix ) *(--bufpt) = prefix; /* Add sign */ - if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */ - char *pre, x; - pre = infop->prefix; - if( *bufpt!=pre[0] ){ - for(pre=infop->prefix; (x=(*pre))!=0; pre++) *(--bufpt) = x; - } - } - length = (int)(&buf[BUFSIZE]-bufpt); - break; - case FLOAT: - case EXP: - case GENERIC: - realvalue = va_arg(ap,double); -#ifndef NOFLOATINGPOINT - if( precision<0 ) precision = 6; /* Set default precision */ - if( precision>BUFSIZE-10 ) precision = BUFSIZE-10; - if( realvalue<0.0 ){ - realvalue = -realvalue; - prefix = '-'; - }else{ - if( flag_plussign ) prefix = '+'; - else if( flag_blanksign ) prefix = ' '; - else prefix = 0; - } - if( infop->type==GENERIC && precision>0 ) precision--; - rounder = 0.0; -#ifdef COMPATIBILITY - /* Rounding works like BSD when the constant 0.4999 is used. Wierd! */ - for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1); -#else - /* It makes more sense to use 0.5 */ - if( precision>MAXDIG-1 ) idx = MAXDIG-1; - else idx = precision; - for(rounder=0.5; idx>0; idx--, rounder*=0.1); -#endif - if( infop->type==FLOAT ) realvalue += rounder; - /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */ - exp = 0; - if( realvalue>0.0 ){ - int k = 0; - while( realvalue>=1e8 && k++<100 ){ realvalue *= 1e-8; exp+=8; } - while( realvalue>=10.0 && k++<100 ){ realvalue *= 0.1; exp++; } - while( realvalue<1e-8 && k++<100 ){ realvalue *= 1e8; exp-=8; } - while( realvalue<1.0 && k++<100 ){ realvalue *= 10.0; exp--; } - if( k>=100 ){ - bufpt = "NaN"; - length = 3; - break; - } - } - bufpt = buf; - /* - ** If the field type is GENERIC, then convert to either EXP - ** or FLOAT, as appropriate. - */ - flag_exp = xtype==EXP; - if( xtype!=FLOAT ){ - realvalue += rounder; - if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; } - } - if( xtype==GENERIC ){ - flag_rtz = !flag_alternateform; - if( exp<-4 || exp>precision ){ - xtype = EXP; - }else{ - precision = precision - exp; - xtype = FLOAT; - } - }else{ - flag_rtz = 0; - } - /* - ** The "exp+precision" test causes output to be of type EXP if - ** the precision is too large to fit in buf[]. - */ - nsd = 0; - if( xtype==FLOAT && exp+precision<BUFSIZE-30 ){ - flag_dp = (precision>0 || flag_alternateform); - if( prefix ) *(bufpt++) = prefix; /* Sign */ - if( exp<0 ) *(bufpt++) = '0'; /* Digits before "." */ - else for(; exp>=0; exp--) *(bufpt++) = getdigit(&realvalue,&nsd); - if( flag_dp ) *(bufpt++) = '.'; /* The decimal point */ - for(exp++; exp<0 && precision>0; precision--, exp++){ - *(bufpt++) = '0'; - } - while( (precision--)>0 ) *(bufpt++) = getdigit(&realvalue,&nsd); - *(bufpt--) = 0; /* Null terminate */ - if( flag_rtz && flag_dp ){ /* Remove trailing zeros and "." */ - while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0; - if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0; - } - bufpt++; /* point to next free slot */ - }else{ /* EXP or GENERIC */ - flag_dp = (precision>0 || flag_alternateform); - if( prefix ) *(bufpt++) = prefix; /* Sign */ - *(bufpt++) = getdigit(&realvalue,&nsd); /* First digit */ - if( flag_dp ) *(bufpt++) = '.'; /* Decimal point */ - while( (precision--)>0 ) *(bufpt++) = getdigit(&realvalue,&nsd); - bufpt--; /* point to last digit */ - if( flag_rtz && flag_dp ){ /* Remove tail zeros */ - while( bufpt>=buf && *bufpt=='0' ) *(bufpt--) = 0; - if( bufpt>=buf && *bufpt=='.' ) *(bufpt--) = 0; - } - bufpt++; /* point to next free slot */ - if( exp || flag_exp ){ - *(bufpt++) = infop->charset[0]; - if( exp<0 ){ *(bufpt++) = '-'; exp = -exp; } /* sign of exp */ - else { *(bufpt++) = '+'; } - if( exp>=100 ){ - *(bufpt++) = (exp/100)+'0'; /* 100's digit */ - exp %= 100; - } - *(bufpt++) = exp/10+'0'; /* 10's digit */ - *(bufpt++) = exp%10+'0'; /* 1's digit */ - } - } - /* The converted number is in buf[] and zero terminated. Output it. - ** Note that the number is in the usual order, not reversed as with - ** integer conversions. */ - length = (int)(bufpt-buf); - bufpt = buf; - - /* Special case: Add leading zeros if the flag_zeropad flag is - ** set and we are not left justified */ - if( flag_zeropad && !flag_leftjustify && length < width){ - int i; - int nPad = width - length; - for(i=width; i>=nPad; i--){ - bufpt[i] = bufpt[i-nPad]; - } - i = prefix!=0; - while( nPad-- ) bufpt[i++] = '0'; - length = width; - } -#endif - break; - case SIZE: - *(va_arg(ap,int*)) = count; - length = width = 0; - break; - case PERCENT: - buf[0] = '%'; - bufpt = buf; - length = 1; - break; - case CHARLIT: - case CHAR: - c = buf[0] = (xtype==CHAR ? va_arg(ap,int) : *++fmt); - if( precision>=0 ){ - for(idx=1; idx<precision; idx++) buf[idx] = c; - length = precision; - }else{ - length =1; - } - bufpt = buf; - break; - case STRING: - case MEM_STRING: - zMem = bufpt = va_arg(ap,char*); - if( bufpt==0 ) bufpt = "(null)"; - length = strlen(bufpt); - if( precision>=0 && precision<length ) length = precision; - break; - case SEEIT: - { - int i; - int c; - char *arg = va_arg(ap,char*); - for(i=0; i<BUFSIZE-1 && (c = *arg++)!=0; i++){ - if( c<0x20 || c>=0x7f ){ - buf[i++] = '^'; - buf[i] = (c&0x1f)+0x40; - }else{ - buf[i] = c; - } - } - bufpt = buf; - length = i; - if( precision>=0 && precision<length ) length = precision; - } - break; - case ERROR: - buf[0] = '%'; - buf[1] = c; - errorflag = 0; - idx = 1+(c!=0); - (*func)("%",idx,arg); - count += idx; - if( c==0 ) fmt--; - break; - }/* End switch over the format type */ - /* - ** The text of the conversion is pointed to by "bufpt" and is - ** "length" characters long. The field width is "width". Do - ** the output. - */ - if( !flag_leftjustify ){ - register int nspace; - nspace = width-length; - if( nspace>0 ){ - if( flag_center ){ - nspace = nspace/2; - width -= nspace; - flag_leftjustify = 1; - } - count += nspace; - while( nspace>=SPACESIZE ){ - (*func)(spaces,SPACESIZE,arg); - nspace -= SPACESIZE; - } - if( nspace>0 ) (*func)(spaces,nspace,arg); - } - } - if( length>0 ){ - (*func)(bufpt,length,arg); - count += length; - } - if( xtype==MEM_STRING && zMem ){ - free(zMem); - } - if( flag_leftjustify ){ - register int nspace; - nspace = width-length; - if( nspace>0 ){ - count += nspace; - while( nspace>=SPACESIZE ){ - (*func)(spaces,SPACESIZE,arg); - nspace -= SPACESIZE; - } - if( nspace>0 ) (*func)(spaces,nspace,arg); - } - } - }/* End for loop over the format string */ - return errorflag ? -1 : count; -} /* End of function */ - -/* -** This non-standard function is still occasionally useful.... -*/ -int xprintf( - void (*func)(char*,int,void*), - void *arg, - const char *format, - ... -){ - va_list ap; - va_start(ap,format); - return vxprintf(func,arg,format,ap); -} - -/* -** Now for string-print, also as found in any standard library. -** Add to this the snprint function which stops added characters -** to the string at a given length. -** -** Note that snprint returns the length of the string as it would -** be if there were no limit on the output. -*/ -struct s_strargument { /* Describes the string being written to */ - char *next; /* Next free slot in the string */ - char *last; /* Last available slot in the string */ -}; - -static void sout(txt,amt,arg) - char *txt; - int amt; - void *arg; -{ - register char *head; - register const char *t; - register int a; - register char *tail; - a = amt; - t = txt; - head = ((struct s_strargument*)arg)->next; - tail = ((struct s_strargument*)arg)->last; - if( tail ){ - while( a-- >0 && head<tail ) *(head++) = *(t++); - }else{ - while( a-- >0 ) *(head++) = *(t++); - } - *head = 0; - ((struct s_strargument*)arg)->next = head; -} - -int sprintf(char *buf, const char *fmt, ...){ - int rc; - va_list ap; - struct s_strargument arg; - - va_start(ap,fmt); - arg.next = buf; - arg.last = 0; - *arg.next = 0; - rc = vxprintf(sout,&arg,fmt,ap); - va_end(ap); -} -int vsprintf(char *buf,const char *fmt,va_list ap){ - struct s_strargument arg; - arg.next = buf; - arg.last = 0; - *buf = 0; - return vxprintf(sout,&arg,fmt,ap); -} -int snprintf(char *buf, size_t n, const char *fmt, ...){ - int rc; - va_list ap; - struct s_strargument arg; - - va_start(ap,fmt); - arg.next = buf; - arg.last = &arg.next[n-1]; - *arg.next = 0; - rc = vxprintf(sout,&arg,fmt,ap); - va_end(ap); -} -int vsnprintf(char *buf, size_t n, const char *fmt, va_list ap){ - struct s_strargument arg; - arg.next = buf; - arg.last = &buf[n-1]; - *buf = 0; - return vxprintf(sout,&arg,fmt,ap); -} - -/* -** The following section of code handles the mprintf routine, that -** writes to memory obtained from malloc(). -*/ - -/* This structure is used to store state information about the -** write in progress -*/ -struct sgMprintf { - char *zBase; /* A base allocation */ - char *zText; /* The string collected so far */ - int nChar; /* Length of the string so far */ - int nAlloc; /* Amount of space allocated in zText */ -}; - -/* The xprintf callback function. */ -static void mout(zNewText,nNewChar,arg) - char *zNewText; - int nNewChar; - void *arg; -{ - struct sgMprintf *pM = (struct sgMprintf*)arg; - if( pM->nChar + nNewChar + 1 > pM->nAlloc ){ - pM->nAlloc = pM->nChar + nNewChar*2 + 1; - if( pM->zText==pM->zBase ){ - pM->zText = malloc(pM->nAlloc); - if( pM->zText && pM->nChar ) memcpy(pM->zText,pM->zBase,pM->nChar); - }else{ - pM->zText = realloc(pM->zText, pM->nAlloc); - } - } - if( pM->zText ){ - memcpy(&pM->zText[pM->nChar], zNewText, nNewChar); - pM->nChar += nNewChar; - pM->zText[pM->nChar] = 0; - } -} - -/* -** mprintf() works like printf(), but allocations memory to hold the -** resulting string and returns a pointer to the allocated memory. -** -** We changed the name to TclMPrint() to conform with the Tcl private -** routine naming conventions. -*/ -char *mprintf(const char *zFormat, ...){ - va_list ap; - struct sgMprintf sMprintf; - char *zNew; - char zBuf[200]; - - va_start(ap,zFormat); - sMprintf.nChar = 0; - sMprintf.nAlloc = sizeof(zBuf); - sMprintf.zText = zBuf; - sMprintf.zBase = zBuf; - vxprintf(mout,&sMprintf,zFormat,ap); - va_end(ap); - if( sMprintf.zText==sMprintf.zBase ){ - zNew = malloc( sMprintf.nChar+1 ); - if( zNew ) strcpy(zNew,zBuf); - }else{ - zNew = realloc(sMprintf.zText,sMprintf.nChar+1); - } - - return zNew; -} - -/* This is the varargs version of mprintf. -** -** The name is changed to TclVMPrintf() to conform with Tcl naming -** conventions. -*/ -char *vmprintf(const char *zFormat,va_list ap){ - struct sgMprintf sMprintf; - char zBuf[200]; - sMprintf.nChar = 0; - sMprintf.zText = zBuf; - sMprintf.nAlloc = sizeof(zBuf); - sMprintf.zBase = zBuf; - vxprintf(mout,&sMprintf,zFormat,ap); - if( sMprintf.zText==sMprintf.zBase ){ - sMprintf.zText = malloc( strlen(zBuf)+1 ); - if( sMprintf.zText ) strcpy(sMprintf.zText,zBuf); - }else{ - sMprintf.zText = realloc(sMprintf.zText,sMprintf.nChar+1); - } - return sMprintf.zText; -} - -/* -** The following section of code handles the standard fprintf routines -** for pthreads. -*/ - -/* The xprintf callback function. */ -static void fout(zNewText,nNewChar,arg) - char *zNewText; - int nNewChar; - void *arg; -{ - fwrite(zNewText,1,nNewChar,(FILE*)arg); -} - -/* The public interface routines */ -int fprintf(FILE *pOut, const char *zFormat, ...){ - va_list ap; - int retc; - - va_start(ap,zFormat); - retc = vxprintf(fout,pOut,zFormat,ap); - va_end(ap); - return retc; -} -int vfprintf(FILE *pOut, const char *zFormat, va_list ap){ - return vxprintf(fout,pOut,zFormat,ap); -} -int printf(const char *zFormat, ...){ - va_list ap; - int retc; - - va_start(ap,zFormat); - retc = vxprintf(fout,stdout,zFormat,ap); - va_end(ap); - return retc; -} -int vprintf(const char *zFormat, va_list ap){ - return vxprintf(fout,stdout,zFormat,ap); -} |