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