1 /*
2 * The authors of this software are Rob Pike and Ken Thompson,
3 * with contributions from Mike Burrows and Sean Dorward.
4 *
5 * Copyright (c) 2002-2006 by Lucent Technologies.
6 * Portions Copyright (c) 2004 Google Inc.
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose without fee is hereby granted, provided that this entire notice
10 * is included in all copies of any software which is or includes a copy
11 * or modification of this software and in all copies of the supporting
12 * documentation for such software.
13 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
14 * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES
15 * NOR GOOGLE INC MAKE ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING
16 * THE MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
17 */
18
19 #include <u.h>
20 #include <libc.h>
21 #include "fmtdef.h"
22
23 /* format the output into f->to and return the number of characters fmted */
24
25 /* BUG: THIS FILE IS NOT UPDATED TO THE NEW SPEC */
26 int
27 dorfmt(Fmt *f, const Rune *fmt)
28 {
29 Rune *rt, *rs;
30 int r;
31 char *t, *s;
32 int nfmt;
33
34 nfmt = f->nfmt;
35 for(;;){
36 if(f->runes){
37 rt = (Rune*)f->to;
38 rs = (Rune*)f->stop;
39 while((r = *fmt++) && r != '%'){
40 FMTRCHAR(f, rt, rs, r);
41 }
42 f->nfmt += rt - (Rune *)f->to;
43 f->to = rt;
44 if(!r)
45 return f->nfmt - nfmt;
46 f->stop = rs;
47 }else{
48 t = (char*)f->to;
49 s = (char*)f->stop;
50 while((r = *fmt++) && r != '%'){
51 FMTRUNE(f, t, f->stop, r);
52 }
53 f->nfmt += t - (char *)f->to;
54 f->to = t;
55 if(!r)
56 return f->nfmt - nfmt;
57 f->stop = s;
58 }
59
60 fmt = (Rune*)__fmtdispatch(f, (Rune*)fmt, 1);
61 if(fmt == nil)
62 return -1;
63 }
64 return 0; /* not reached */
65 }