72 lines
1.1 KiB
C
72 lines
1.1 KiB
C
#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;
|
|
}
|