78 lines
1.1 KiB
C
78 lines
1.1 KiB
C
#include <u.h>
|
|
#include <libc.h>
|
|
#include <ctype.h>
|
|
|
|
int
|
|
encodefmt(Fmt *f)
|
|
{
|
|
char *out;
|
|
char *buf;
|
|
int len;
|
|
int ilen;
|
|
int rv;
|
|
uchar *b;
|
|
char *p;
|
|
char obuf[64]; // rsc optimization
|
|
|
|
if(!(f->flags&FmtPrec) || f->prec < 1)
|
|
goto error;
|
|
|
|
b = va_arg(f->args, uchar*);
|
|
if(b == 0)
|
|
return fmtstrcpy(f, "<nil>");
|
|
|
|
ilen = f->prec;
|
|
f->prec = 0;
|
|
f->flags &= ~FmtPrec;
|
|
switch(f->r){
|
|
case '<':
|
|
len = (8*ilen+4)/5 + 3;
|
|
break;
|
|
case '[':
|
|
len = (8*ilen+5)/6 + 4;
|
|
break;
|
|
case 'H':
|
|
len = 2*ilen + 1;
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
|
|
if(len > sizeof(obuf)){
|
|
buf = malloc(len);
|
|
if(buf == nil)
|
|
goto error;
|
|
} else
|
|
buf = obuf;
|
|
|
|
// convert
|
|
out = buf;
|
|
switch(f->r){
|
|
case '<':
|
|
rv = enc32(out, len, b, ilen);
|
|
break;
|
|
case '[':
|
|
rv = enc64(out, len, b, ilen);
|
|
break;
|
|
case 'H':
|
|
rv = enc16(out, len, b, ilen);
|
|
if(rv >= 0 && (f->flags & FmtLong))
|
|
for(p = buf; *p; p++)
|
|
*p = tolower(*p);
|
|
break;
|
|
default:
|
|
rv = -1;
|
|
break;
|
|
}
|
|
if(rv < 0)
|
|
goto error;
|
|
|
|
fmtstrcpy(f, buf);
|
|
if(buf != obuf)
|
|
free(buf);
|
|
return 0;
|
|
|
|
error:
|
|
return fmtstrcpy(f, "<encodefmt>");
|
|
}
|