1*0d601874SDavid du Colombier /* 2*0d601874SDavid du Colombier * The authors of this software are Rob Pike and Ken Thompson. 3*0d601874SDavid du Colombier * Copyright (c) 2002 by Lucent Technologies. 4*0d601874SDavid du Colombier * Permission to use, copy, modify, and distribute this software for any 5*0d601874SDavid du Colombier * purpose without fee is hereby granted, provided that this entire notice 6*0d601874SDavid du Colombier * is included in all copies of any software which is or includes a copy 7*0d601874SDavid du Colombier * or modification of this software and in all copies of the supporting 8*0d601874SDavid du Colombier * documentation for such software. 9*0d601874SDavid du Colombier * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED 10*0d601874SDavid du Colombier * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE 11*0d601874SDavid du Colombier * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY 12*0d601874SDavid du Colombier * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. 13*0d601874SDavid du Colombier */ 148ccd4a63SDavid du Colombier #include <u.h> 158ccd4a63SDavid du Colombier #include <libc.h> 168ccd4a63SDavid du Colombier #include "fmtdef.h" 178ccd4a63SDavid du Colombier 188ccd4a63SDavid du Colombier static int 198ccd4a63SDavid du Colombier runeFmtStrFlush(Fmt *f) 208ccd4a63SDavid du Colombier { 218ccd4a63SDavid du Colombier Rune *s; 228ccd4a63SDavid du Colombier int n; 238ccd4a63SDavid du Colombier 248ccd4a63SDavid du Colombier if(f->start == nil) 258ccd4a63SDavid du Colombier return 0; 26*0d601874SDavid du Colombier n = (uintptr)f->farg; 278ccd4a63SDavid du Colombier n *= 2; 28*0d601874SDavid du Colombier s = (Rune*)f->start; 298ccd4a63SDavid du Colombier f->start = realloc(s, sizeof(Rune)*n); 308ccd4a63SDavid du Colombier if(f->start == nil){ 318ccd4a63SDavid du Colombier f->farg = nil; 328ccd4a63SDavid du Colombier f->to = nil; 338ccd4a63SDavid du Colombier f->stop = nil; 348ccd4a63SDavid du Colombier free(s); 358ccd4a63SDavid du Colombier return 0; 368ccd4a63SDavid du Colombier } 37*0d601874SDavid du Colombier f->farg = (void*)(uintptr)n; 388ccd4a63SDavid du Colombier f->to = (Rune*)f->start + ((Rune*)f->to - s); 398ccd4a63SDavid du Colombier f->stop = (Rune*)f->start + n - 1; 408ccd4a63SDavid du Colombier return 1; 418ccd4a63SDavid du Colombier } 428ccd4a63SDavid du Colombier 438ccd4a63SDavid du Colombier int 448ccd4a63SDavid du Colombier runefmtstrinit(Fmt *f) 458ccd4a63SDavid du Colombier { 468ccd4a63SDavid du Colombier int n; 478ccd4a63SDavid du Colombier 488ccd4a63SDavid du Colombier memset(f, 0, sizeof *f); 498ccd4a63SDavid du Colombier f->runes = 1; 508ccd4a63SDavid du Colombier n = 32; 518ccd4a63SDavid du Colombier f->start = malloc(sizeof(Rune)*n); 528ccd4a63SDavid du Colombier if(f->start == nil) 538ccd4a63SDavid du Colombier return -1; 548ccd4a63SDavid du Colombier f->to = f->start; 558ccd4a63SDavid du Colombier f->stop = (Rune*)f->start + n - 1; 568ccd4a63SDavid du Colombier f->flush = runeFmtStrFlush; 57*0d601874SDavid du Colombier f->farg = (void*)(uintptr)n; 588ccd4a63SDavid du Colombier f->nfmt = 0; 598ccd4a63SDavid du Colombier return 0; 608ccd4a63SDavid du Colombier } 618ccd4a63SDavid du Colombier 628ccd4a63SDavid du Colombier /* 638ccd4a63SDavid du Colombier * print into an allocated string buffer 648ccd4a63SDavid du Colombier */ 658ccd4a63SDavid du Colombier Rune* 668ccd4a63SDavid du Colombier runevsmprint(char *fmt, va_list args) 678ccd4a63SDavid du Colombier { 688ccd4a63SDavid du Colombier Fmt f; 698ccd4a63SDavid du Colombier int n; 708ccd4a63SDavid du Colombier 718ccd4a63SDavid du Colombier if(runefmtstrinit(&f) < 0) 728ccd4a63SDavid du Colombier return nil; 73*0d601874SDavid du Colombier VA_COPY(f.args,args); 748ccd4a63SDavid du Colombier n = dofmt(&f, fmt); 75*0d601874SDavid du Colombier VA_END(f.args); 768ccd4a63SDavid du Colombier if(f.start == nil) 778ccd4a63SDavid du Colombier return nil; 788ccd4a63SDavid du Colombier if(n < 0){ 798ccd4a63SDavid du Colombier free(f.start); 808ccd4a63SDavid du Colombier return nil; 818ccd4a63SDavid du Colombier } 828ccd4a63SDavid du Colombier *(Rune*)f.to = '\0'; 83*0d601874SDavid du Colombier return (Rune*)f.start; 848ccd4a63SDavid du Colombier } 85