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/* Project: OSLib
* Description: The OS Construction Kit
* Date: 1.6.2000
* Idea by: Luca Abeni & Gerardo Lamastra
*
* OSLib is an SO project aimed at developing a common, easy-to-use
* low-level infrastructure for developing OS kernels and Embedded
* Applications; it partially derives from the HARTIK project but it
* currently is independently developed.
*
* OSLib is distributed under GPL License, and some of its code has
* been derived from the Linux kernel source; also some important
* ideas come from studying the DJGPP go32 extender.
*
* We acknowledge the Linux Community, Free Software Foundation,
* D.J. Delorie and all the other developers who believe in the
* freedom of software and ideas.
*
* For legalese, check out the included GPL license.
*/
#include <ll/i386/stdlib.h>
#include <ll/i386/string.h>
#include <ll/i386/limits.h>
#include <ll/i386/float.h>
#include <ll/i386/mem.h>
#include <ll/stdarg.h>
#include <ll/ctype.h>
#include <ll/math.h>
#include "sprintf.h"
FILE
(sprintf);
#define STD_SIZE 0
#define SHORT_SIZE 1
#define LONG_SIZE 2
int vsprintf(char *buf
,char *fmt
,va_list parms
)
{
int scanned
= 0,w
= 0,prec
= 0,l
= 0,size
= 0;
int n1
= 0;
unsigned n2
= 0,parsing
= 0,flag
= 0;
double n3
= 0.0;
char *base
= buf
;
char *sp
= NULL
;
void *fp
= NULL
;
while (*fmt
!= 0) {
if (*fmt
!= '%' && !parsing
) {
/* No token detected */
*buf
++ = *fmt
++;
scanned
++;
}
else {
/* We need to make a conversion */
if (*fmt
== '%') {
fmt
++;
parsing
= 1;
w
= 10;
prec
= 4;
size
= STD_SIZE
;
flag
= 0;
}
/* Parse token */
switch(*fmt
) {
case '%' : *buf
++ = '%';
scanned
++;
parsing
= 0;
break;
case 'c' : *buf
++ = va_arg(parms
, char);
scanned
++;
parsing
= 0;
break;
case 'i' :
case 'd' : switch (size
) {
case STD_SIZE
: n1
= va_arg(parms
, int);
break;
case LONG_SIZE
: n1
= va_arg(parms
, long int);
break;
case SHORT_SIZE
: n1
= va_arg(parms
, short int);
break;
}
l
= dcvt
(n1
,buf
,10,w
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'u' : switch (size
) {
case STD_SIZE
: n2
= va_arg(parms
, unsigned);
break;
case LONG_SIZE
: n2
= va_arg(parms
, unsigned long);
break;
case SHORT_SIZE
: n2
= va_arg(parms
, unsigned short);
break;
}
l
= ucvt
(n2
,buf
,10,w
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'x' : switch (size
) {
case STD_SIZE
: n2
= va_arg(parms
, unsigned);
break;
case LONG_SIZE
: n2
= va_arg(parms
, unsigned long);
break;
case SHORT_SIZE
: n2
= va_arg(parms
, unsigned short);
break;
}
l
= ucvt
(n2
,buf
,16,w
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'p' : fp
= va_arg(parms
, void *);
n2
= (unsigned long)(fp
);
l
= ucvt
(n2
,buf
,16,w
,0);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 's' : sp
= va_arg(parms
, char *);
while (*sp
!= 0) {
*buf
++ = *sp
++;
l
++;
}
scanned
+= l
;
parsing
= 0;
break;
case 'f' : switch (size
) {
case STD_SIZE
: n3
= va_arg(parms
, double);
break;
case LONG_SIZE
: n3
= va_arg(parms
, double);
break;
/*
It seems that the compilers push a float as
a double ... Need to check!
*/
case SHORT_SIZE
: n3
= va_arg(parms
, double);
break;
}
l
= fcvt
(n3
,buf
,w
,prec
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'e' : switch (size
) {
case STD_SIZE
: n3
= va_arg(parms
, double);
break;
case LONG_SIZE
: n3
= va_arg(parms
, double);
break;
/*
It seems that the compilers push a float as
a double ... Need to check!
*/
case SHORT_SIZE
: n3
= va_arg(parms
, double);
break;
}
l
= ecvt
(n3
,buf
,w
,prec
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'g' : switch (size
) {
case STD_SIZE
: n3
= va_arg(parms
, double);
break;
case LONG_SIZE
: n3
= va_arg(parms
, double);
break;
/*
It seems that the compilers push a float as
a double ... Need to check!
*/
case SHORT_SIZE
: n3
= va_arg(parms
, double);
break;
}
l
= gcvt
(n3
,buf
,w
,prec
,flag
);
scanned
+= l
;
buf
+= l
;
parsing
= 0;
break;
case 'l' : size
= LONG_SIZE
;
break;
case 'n' :
case 'h' : size
= SHORT_SIZE
;
break;
case '+' : flag
|= ADD_PLUS
;
break;
case '-' : flag
|= LEFT_PAD
;
break;
case '.' : parsing
= 2;
flag
|= RESPECT_WIDTH
;
break;
case '1' :
case '2' :
case '3' :
case '4' :
case '5' :
case '6' :
case '7' :
case '8' :
case '9' :
case '0' : if (parsing
== 1) {
w
= strtou
(fmt
,10,&base
);
/* MG */
/* if the first numeral is zero a ZERO pad is */
/* required */
/* but not if LEFT_PAD is set*/
if (*fmt
!='0'||flag
&LEFT_PAD
)
flag
|= SPACE_PAD
;
else
flag
|= ZERO_PAD
;
fmt
= base
-1;
} else if (parsing
== 2) {
prec
= strtou
(fmt
,10,&base
);
fmt
= base
-1;
parsing
= 1;
}
break;
default : parsing
= 0;
break;
}
fmt
++;
}
}
*buf
= 0;
return(scanned
);
}
int sprintf(char *buf
,char *fmt
,...
)
{
va_list parms
;
int result
;
va_start(parms
,fmt
);
result
= vsprintf(buf
,fmt
,parms
);
va_end(parms
);
return(result
);
}