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 11 * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY 12 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. 13 */ 14 #include <u.h> 15 #include <libc.h> 16 #include "fmtdef.h" 17 18 /* format the output into f->to and return the number of characters fmted */ 19 20 int 21 dorfmt(Fmt *f, const Rune *fmt) 22 { 23 Rune *rt, *rs; 24 int r; 25 char *t, *s; 26 int nfmt; 27 28 nfmt = f->nfmt; 29 for(;;){ 30 if(f->runes){ 31 rt = f->to; 32 rs = f->stop; 33 while((r = *fmt++) && r != '%'){ 34 FMTRCHAR(f, rt, rs, r); 35 } 36 f->nfmt += rt - (Rune *)f->to; 37 f->to = rt; 38 if(!r) 39 return f->nfmt - nfmt; 40 f->stop = rs; 41 }else{ 42 t = f->to; 43 s = f->stop; 44 while((r = *fmt++) && r != '%'){ 45 FMTRUNE(f, t, f->stop, r); 46 } 47 f->nfmt += t - (char *)f->to; 48 f->to = t; 49 if(!r) 50 return f->nfmt - nfmt; 51 f->stop = s; 52 } 53 54 fmt = __fmtdispatch(f, (Rune*)fmt, 1); 55 if(fmt == nil) 56 return -1; 57 } 58 return 0; /* not reached */ 59 } 60