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#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 = enc64(out, len, b, ilen);
break;
case '<':
rv = enc32(out, len, b, ilen);
break;
case 'H':
rv = enc16(out, len, b, ilen);
break;
default:
rv = -1;
break;
}
if(rv < 0)
goto error;
if((f->flags & FmtLong) != 0 && f->r != '[')
for(p = buf; *p; p++)
*p = tolower(*p);
fmtstrcpy(f, buf);
if(buf != obuf)
free(buf);
return 0;
error:
return fmtstrcpy(f, "<encodefmt>");
}
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