321 lines
9.2 KiB
C
321 lines
9.2 KiB
C
|
/**************************************************************
|
||
|
|
* Original:
|
||
|
|
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
|
||
|
|
* A bombproof version of doprnt (dopr) included.
|
||
|
|
* Sigh. This sort of thing is always nasty do deal with. Note that
|
||
|
|
* the version here does not include floating point...
|
||
|
|
*
|
||
|
|
* snprintf() is used instead of sprintf() as it does limit checks
|
||
|
|
* for string length. This covers a nasty loophole.
|
||
|
|
*
|
||
|
|
* The other functions are there to prevent NULL pointers from
|
||
|
|
* causing nast effects.
|
||
|
|
**************************************************************/
|
||
|
|
|
||
|
|
/* $XFree86: xc/lib/misc/snprintf.c,v 3.0 1996/08/26 06:19:23 dawes Exp $ */
|
||
|
|
|
||
|
|
#include <ctype.h>
|
||
|
|
#include "snprintf.h"
|
||
|
|
|
||
|
|
static void dopr();
|
||
|
|
static char *end;
|
||
|
|
|
||
|
|
/* varargs declarations: */
|
||
|
|
|
||
|
|
#if defined(HAVE_STDARG_H)
|
||
|
|
# include <stdarg.h>
|
||
|
|
# define HAVE_STDARGS /* let's hope that works everywhere (mj) */
|
||
|
|
# define VA_LOCAL_DECL va_list ap;
|
||
|
|
# define VA_START(f) va_start(ap, f)
|
||
|
|
# define VA_SHIFT(v,t) ; /* no-op for ANSI */
|
||
|
|
# define VA_END va_end(ap)
|
||
|
|
#else
|
||
|
|
# if defined(HAVE_VARARGS_H)
|
||
|
|
# include <varargs.h>
|
||
|
|
# undef HAVE_STDARGS
|
||
|
|
# define VA_LOCAL_DECL va_list ap;
|
||
|
|
# define VA_START(f) va_start(ap) /* f is ignored! */
|
||
|
|
# define VA_SHIFT(v,t) v = va_arg(ap,t)
|
||
|
|
# define VA_END va_end(ap)
|
||
|
|
# else
|
||
|
|
/*XX ** NO VARARGS ** XX*/
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef HAVE_STDARGS
|
||
|
|
int snprintf (char *str, size_t count, const char *fmt, ...);
|
||
|
|
int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
|
||
|
|
#else
|
||
|
|
int snprintf ();
|
||
|
|
int vsnprintf ();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int
|
||
|
|
vsnprintf(str, count, fmt, args)
|
||
|
|
char *str;
|
||
|
|
size_t count;
|
||
|
|
const char *fmt;
|
||
|
|
va_list args;
|
||
|
|
{
|
||
|
|
str[0] = 0;
|
||
|
|
end = str+count-1;
|
||
|
|
dopr( str, fmt, args );
|
||
|
|
if( count>0 ){
|
||
|
|
end[0] = 0;
|
||
|
|
}
|
||
|
|
return(strlen(str));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* VARARGS3 */
|
||
|
|
#ifdef HAVE_STDARGS
|
||
|
|
int
|
||
|
|
snprintf (char *str,size_t count,const char *fmt,...)
|
||
|
|
#else
|
||
|
|
int
|
||
|
|
snprintf (va_alist) va_dcl
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifndef HAVE_STDARGS
|
||
|
|
char *str;
|
||
|
|
size_t count;
|
||
|
|
char *fmt;
|
||
|
|
#endif
|
||
|
|
VA_LOCAL_DECL
|
||
|
|
|
||
|
|
VA_START (fmt);
|
||
|
|
VA_SHIFT (str, char *);
|
||
|
|
VA_SHIFT (count, size_t );
|
||
|
|
VA_SHIFT (fmt, char *);
|
||
|
|
(void) vsnprintf ( str, count, fmt, ap);
|
||
|
|
VA_END;
|
||
|
|
return( strlen( str ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* dopr(): poor man's version of doprintf
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void fmtstr(
|
||
|
|
#if NeedFunctionPrototypes
|
||
|
|
char *value, int ljust, int len, int zpad
|
||
|
|
#endif
|
||
|
|
);
|
||
|
|
|
||
|
|
static void fmtnum(
|
||
|
|
#if NeedFunctionPrototypes
|
||
|
|
long value, int base, int dosign, int ljust, int len, int zpad
|
||
|
|
#endif
|
||
|
|
);
|
||
|
|
|
||
|
|
static void dostr(
|
||
|
|
#if NeedFunctionPrototypes
|
||
|
|
char *
|
||
|
|
#endif
|
||
|
|
);
|
||
|
|
|
||
|
|
static char *output;
|
||
|
|
|
||
|
|
static void dopr_outch(
|
||
|
|
#if NeedFunctionPrototypes
|
||
|
|
int c
|
||
|
|
#endif
|
||
|
|
);
|
||
|
|
|
||
|
|
static void
|
||
|
|
dopr( buffer, format, args )
|
||
|
|
char *buffer;
|
||
|
|
char *format;
|
||
|
|
va_list args;
|
||
|
|
{
|
||
|
|
int ch;
|
||
|
|
long value;
|
||
|
|
int longflag = 0;
|
||
|
|
char *strvalue;
|
||
|
|
int ljust;
|
||
|
|
int len;
|
||
|
|
int zpad;
|
||
|
|
|
||
|
|
output = buffer;
|
||
|
|
while( (ch = *format++) ){
|
||
|
|
switch( ch ){
|
||
|
|
case '%':
|
||
|
|
ljust = len = zpad = 0;
|
||
|
|
nextch:
|
||
|
|
ch = *format++;
|
||
|
|
switch( ch ){
|
||
|
|
case 0:
|
||
|
|
dostr( "**end of format**" );
|
||
|
|
return;
|
||
|
|
case '-': ljust = 1; goto nextch;
|
||
|
|
case '0': /* set zero padding if len not set */
|
||
|
|
if(len==0) zpad = '0';
|
||
|
|
case '1': case '2': case '3':
|
||
|
|
case '4': case '5': case '6':
|
||
|
|
case '7': case '8': case '9':
|
||
|
|
len = len*10 + ch - '0';
|
||
|
|
goto nextch;
|
||
|
|
case 'l': longflag = 1; goto nextch;
|
||
|
|
case 'u': case 'U':
|
||
|
|
/*fmtnum(value,base,dosign,ljust,len,zpad) */
|
||
|
|
if( longflag ){
|
||
|
|
value = va_arg( args, long );
|
||
|
|
} else {
|
||
|
|
value = va_arg( args, int );
|
||
|
|
}
|
||
|
|
fmtnum( value, 10,0, ljust, len, zpad ); break;
|
||
|
|
case 'o': case 'O':
|
||
|
|
/*fmtnum(value,base,dosign,ljust,len,zpad) */
|
||
|
|
if( longflag ){
|
||
|
|
value = va_arg( args, long );
|
||
|
|
} else {
|
||
|
|
value = va_arg( args, int );
|
||
|
|
}
|
||
|
|
fmtnum( value, 8,0, ljust, len, zpad ); break;
|
||
|
|
case 'd': case 'D':
|
||
|
|
if( longflag ){
|
||
|
|
value = va_arg( args, long );
|
||
|
|
} else {
|
||
|
|
value = va_arg( args, int );
|
||
|
|
}
|
||
|
|
fmtnum( value, 10,1, ljust, len, zpad ); break;
|
||
|
|
case 'x':
|
||
|
|
if( longflag ){
|
||
|
|
value = va_arg( args, long );
|
||
|
|
} else {
|
||
|
|
value = va_arg( args, int );
|
||
|
|
}
|
||
|
|
fmtnum( value, 16,0, ljust, len, zpad ); break;
|
||
|
|
case 'X':
|
||
|
|
if( longflag ){
|
||
|
|
value = va_arg( args, long );
|
||
|
|
} else {
|
||
|
|
value = va_arg( args, int );
|
||
|
|
}
|
||
|
|
fmtnum( value,-16,0, ljust, len, zpad ); break;
|
||
|
|
case 's':
|
||
|
|
strvalue = va_arg( args, char *);
|
||
|
|
fmtstr( strvalue,ljust,len,zpad ); break;
|
||
|
|
case 'c':
|
||
|
|
ch = va_arg( args, int );
|
||
|
|
dopr_outch( ch ); break;
|
||
|
|
case '%': dopr_outch( ch ); continue;
|
||
|
|
default:
|
||
|
|
dostr( "???????" );
|
||
|
|
}
|
||
|
|
longflag = 0;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
dopr_outch( ch );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*output = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fmtstr( value, ljust, len, zpad )
|
||
|
|
char *value;
|
||
|
|
int ljust, len, zpad;
|
||
|
|
{
|
||
|
|
int padlen, strlen; /* amount to pad */
|
||
|
|
|
||
|
|
if( value == 0 ){
|
||
|
|
value = "<NULL>";
|
||
|
|
}
|
||
|
|
for( strlen = 0; value[strlen]; ++ strlen ); /* strlen */
|
||
|
|
padlen = len - strlen;
|
||
|
|
if( padlen < 0 ) padlen = 0;
|
||
|
|
if( ljust ) padlen = -padlen;
|
||
|
|
while( padlen > 0 ) {
|
||
|
|
dopr_outch( ' ' );
|
||
|
|
--padlen;
|
||
|
|
}
|
||
|
|
dostr( value );
|
||
|
|
while( padlen < 0 ) {
|
||
|
|
dopr_outch( ' ' );
|
||
|
|
++padlen;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fmtnum( value, base, dosign, ljust, len, zpad )
|
||
|
|
long value;
|
||
|
|
int base, dosign, ljust, len, zpad;
|
||
|
|
{
|
||
|
|
int signvalue = 0;
|
||
|
|
unsigned long uvalue;
|
||
|
|
char convert[20];
|
||
|
|
int place = 0;
|
||
|
|
int padlen = 0; /* amount to pad */
|
||
|
|
int caps = 0;
|
||
|
|
|
||
|
|
/* DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad %d\n",
|
||
|
|
value, base, dosign, ljust, len, zpad )); */
|
||
|
|
uvalue = value;
|
||
|
|
if( dosign ){
|
||
|
|
if( value < 0 ) {
|
||
|
|
signvalue = '-';
|
||
|
|
uvalue = -value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if( base < 0 ){
|
||
|
|
caps = 1;
|
||
|
|
base = -base;
|
||
|
|
}
|
||
|
|
do{
|
||
|
|
convert[place++] =
|
||
|
|
(caps? "0123456789ABCDEF":"0123456789abcdef")
|
||
|
|
[uvalue % (unsigned)base ];
|
||
|
|
uvalue = (uvalue / (unsigned)base );
|
||
|
|
}while(uvalue);
|
||
|
|
convert[place] = 0;
|
||
|
|
padlen = len - place;
|
||
|
|
if( padlen < 0 ) padlen = 0;
|
||
|
|
if( ljust ) padlen = -padlen;
|
||
|
|
/* DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n",
|
||
|
|
convert,place,signvalue,padlen)); */
|
||
|
|
if( zpad && padlen > 0 ){
|
||
|
|
if( signvalue ){
|
||
|
|
dopr_outch( signvalue );
|
||
|
|
--padlen;
|
||
|
|
signvalue = 0;
|
||
|
|
}
|
||
|
|
while( padlen > 0 ){
|
||
|
|
dopr_outch( zpad );
|
||
|
|
--padlen;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while( padlen > 0 ) {
|
||
|
|
dopr_outch( ' ' );
|
||
|
|
--padlen;
|
||
|
|
}
|
||
|
|
if( signvalue ) dopr_outch( signvalue );
|
||
|
|
while( place > 0 ) dopr_outch( convert[--place] );
|
||
|
|
while( padlen < 0 ){
|
||
|
|
dopr_outch( ' ' );
|
||
|
|
++padlen;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
dostr( str )
|
||
|
|
char *str;
|
||
|
|
{
|
||
|
|
while(*str) dopr_outch(*str++);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
dopr_outch( c )
|
||
|
|
int c;
|
||
|
|
{
|
||
|
|
if( iscntrl(c) && c != '\n' && c != '\t' ){
|
||
|
|
c = '@' + (c & 0x1F);
|
||
|
|
if( end == 0 || output < end ){
|
||
|
|
*output++ = '^';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if( end == 0 || output < end ){
|
||
|
|
*output++ = c;
|
||
|
|
}
|
||
|
|
}
|