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