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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 <arch/i386/stdlib.h>
#include <arch/i386/string.h>
#include <arch/i386/limits.h>
#include <arch/stdarg.h>
#include <arch/ctype.h>
#include "sprintf.h"
FILE
(sscanf);
#define STD_SIZE 0
#define SHORT_SIZE 1
#define LONG_SIZE 2
int vsscanf(char *buf
,char *fmt
,va_list parms
)
{
int scanned
= 0,size
= 0,suppress
= 0;
int w
= 0,flag
= 0,l
= 0;
char c
,*c_ptr
;
long int n1
,*n1l
;
int *n1b
;
short int *n1s
;
long unsigned n2
,*n2l
,parsing
= 0;
unsigned *n2b
;
short unsigned *n2s
;
double n3
,*n3l
;
float *n3s
;
char *base
= buf
;
while (*fmt
!= 0) {
if (*fmt
!= '%' && !parsing
) {
/* No token detected */
fmt
++;
}
else {
/* We need to make a conversion */
if (*fmt
== '%') {
fmt
++;
parsing
= 1;
size
= STD_SIZE
;
suppress
= 0;
w
= 0;
flag
= 0;
l
= 0;
}
/* Parse token */
switch(*fmt
) {
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
);
/* We use SPACE_PAD to parse %10s
commands where the number is the
maximum number of char to store!
*/
flag
|= SPACE_PAD
;
fmt
= base
-1;
}
break;
case 'c' : c
= *buf
++;
c_ptr
= va_arg(parms
, char *);
*c_ptr
= c
;
scanned
++;
parsing
= 0;
break;
case 's' : c_ptr
= va_arg(parms
, char *);
while (*buf
!= 0 && isspace(*buf
)) buf
++;
l
= 0;
while (*buf
!= 0 && !isspace(*buf
)) {
if (!(flag
& SPACE_PAD
)) *c_ptr
++ = *buf
;
else if (l
< w
) {
*c_ptr
++ = *buf
;
l
++;
}
buf
++;
}
*c_ptr
= 0;
scanned
++;
parsing
= 0;
break;
case 'i' :
case 'd' : buf
= strscn
(buf
,"1234567890-+");
n1
= strtoi
(buf
,10,&base
);
buf
= base
;
if (!suppress
) {
switch (size
) {
case STD_SIZE
: n1b
= va_arg(parms
, int *);
*n1b
= (int)n1
;
break;
case LONG_SIZE
: n1l
= va_arg(parms
, long int *);
*n1l
= n1
;
break;
case SHORT_SIZE
: n1s
= va_arg(parms
, short int *);
*n1s
= (short)(n1
);
break;
}
scanned
++;
}
parsing
= 0;
break;
case 'u' : buf
= strscn
(buf
,"1234567890");
n2
= strtou
(buf
,10,&base
);
buf
= base
;
if (!suppress
) {
switch (size
) {
case STD_SIZE
: n2b
= va_arg(parms
, unsigned *);
*n2b
= (unsigned)n2
;
break;
case LONG_SIZE
: n2l
= va_arg(parms
, long unsigned *);
*n2l
= n2
;
break;
case SHORT_SIZE
: n2s
= va_arg(parms
, short unsigned *);
*n2s
= (short)(n2
);
break;
}
scanned
++;
}
parsing
= 0;
break;
case 'x' : buf
= strscn
(buf
,"1234567890xabcdefABCDEF");
n2
= strtou
(buf
,16,&base
);
buf
= base
;
if (!suppress
) {
switch (size
) {
case STD_SIZE
: n2b
= va_arg(parms
, unsigned *);
*n2b
= (unsigned)n2
;
break;
case LONG_SIZE
: n2l
= va_arg(parms
, long unsigned *);
*n2l
= n2
;
break;
case SHORT_SIZE
: n2s
= va_arg(parms
, short unsigned *);
*n2s
= (short)(n2
);
break;
}
scanned
++;
}
parsing
= 0;
break;
case 'f' :
case 'g' :
case 'e' : buf
= strscn
(buf
,"1234567890.e+-");
n3
= strtod(buf
,&base
);
buf
= base
;
if (!suppress
) {
switch (size
) {
case STD_SIZE
: n3l
= va_arg(parms
, double *);
*n3l
= n3
;
break;
case LONG_SIZE
: n3l
= va_arg(parms
, double *);
*n3l
= n3
;
break;
case SHORT_SIZE
: n3s
= va_arg(parms
, float *);
*n3s
= (float)(n3
);
break;
}
scanned
++;
}
parsing
= 0;
break;
case 'l' : size
= LONG_SIZE
;
break;
case 'h' :
case 'n' : size
= SHORT_SIZE
;
break;
case '*' : suppress
= 1;
break;
default : parsing
= 0;
break;
}
fmt
++;
}
}
return(scanned
);
}
int sscanf(char *buf
,char *fmt
,...
)
{
va_list parms
;
int result
;
va_start(parms
,fmt
);
result
= vsscanf(buf
,fmt
,parms
);
va_end(parms
);
return(result
);
}