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/*
* 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.
*/
/*
* Plan 9 port version must include libc.h in order to
* get Plan 9 debugging malloc, which sometimes returns
* different pointers than the standard malloc.
*/
#ifdef PLAN9PORT
#include <u.h>
#include <libc.h>
#include "fmtdef.h"
#else
#include <stdlib.h>
#include "plan9.h"
#include "fmt.h"
#include "fmtdef.h"
#endif
static int
fmtStrFlush(Fmt *f)
{
char *s;
int n;
if(f->start == nil)
return 0;
n = (int)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*)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*)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);
return nil;
}
return fmtstrflush(&f);
}
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