/* * The authors of this software are Rob Pike and Ken Thompson. *              Copyright (c) 2002 by Lucent Technologies. * 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 MAKE ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. */#include "lib9.h"#include "fmtdef.h" static intfmtStrFlush(Fmt *f){	char *s;	int n; 	if(f->start == nil)		return 0;	n = (int)f->farg;	n += 256;	f->farg = (void*)n;	s = f->start;	f->start = realloc(s, n);	if(f->start == nil){		free(s);		f->to = nil;		f->stop = nil;		return 0;	}	f->to = (char*)f->start + ((char*)f->to - s);	f->stop = (char*)f->start + n - 1;	return 1;} intfmtstrinit(Fmt *f){	int n; 	memset(f, 0, sizeof(*f));	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*)n;	f->nfmt = 0;	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);		f.start = nil;		return nil;	}	return fmtstrflush(&f);}