/* * The authors of this software are Rob Pike and Ken Thompson, * with contributions from Mike Burrows and Sean Dorward. * * Copyright (c) 2002-2006 by Lucent Technologies. * Portions Copyright (c) 2004 Google Inc. * * Permission to use, copy, modify, and distribute this software for any * purpose without fee is hereby granted, provided that this entire notice * is included in all copies of any software which is or includes a copy * or modification of this software and in all copies of the supporting * documentation for such software. * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES * NOR GOOGLE INC MAKE ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING * THE MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. */ #include #include #include "fmtdef.h" static int fmtStrFlush(Fmt *f) { char *s; int n; if(f->start == nil) return 0; n = (uintptr)f->farg; n *= 2; s = (char*)f->start; f->start = realloc(s, n); if(f->start == nil){ f->farg = nil; f->to = nil; f->stop = nil; free(s); return 0; } f->farg = (void*)(uintptr)n; f->to = (char*)f->start + ((char*)f->to - s); f->stop = (char*)f->start + n - 1; return 1; } int fmtstrinit(Fmt *f) { int n; memset(f, 0, sizeof *f); f->runes = 0; n = 32; f->start = malloc(n); if(f->start == nil) return -1; f->to = f->start; f->stop = (char*)f->start + n - 1; f->flush = fmtStrFlush; f->farg = (void*)(uintptr)n; f->nfmt = 0; fmtlocaleinit(f, nil, nil, nil); return 0; } /* * print into an allocated string buffer */ char* vsmprint(char *fmt, va_list args) { Fmt f; int n; if(fmtstrinit(&f) < 0) return nil; VA_COPY(f.args,args); n = dofmt(&f, fmt); VA_END(f.args); if(n < 0){ free(f.start); return nil; } return fmtstrflush(&f); }