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#include <u.h>
#include <libc.h>
#include "fmtdef.h"
static int
runeFmtStrFlush(Fmt *f)
{
Rune *s;
int n;
if(f->start == nil)
return 0;
n = (uintptr)f->farg;
n *= 2;
s = (Rune*)f->start;
f->start = realloc(s, sizeof(Rune)*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 = (Rune*)f->start + ((Rune*)f->to - s);
f->stop = (Rune*)f->start + n - 1;
return 1;
}
int
runefmtstrinit(Fmt *f)
{
int n;
memset(f, 0, sizeof *f);
f->runes = 1;
n = 32;
f->start = malloc(sizeof(Rune)*n);
if(f->start == nil)
return -1;
f->to = f->start;
f->stop = (Rune*)f->start + n - 1;
f->flush = runeFmtStrFlush;
f->farg = (void*)(uintptr)n;
f->nfmt = 0;
return 0;
}
/*
* print into an allocated string buffer
*/
Rune*
runevsmprint(char *fmt, va_list args)
{
Fmt f;
int n;
if(runefmtstrinit(&f) < 0)
return nil;
VA_COPY(f.args,args);
n = dofmt(&f, fmt);
VA_END(f.args);
if(f.start == nil)
return nil;
if(n < 0){
free(f.start);
return nil;
}
*(Rune*)f.to = '\0';
return (Rune*)f.start;
}
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