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- #include <u.h>
- #include <libc.h>
- #include "fmtdef.h"
- /*
- * generic routine for flushing a formatting buffer
- * to a file descriptor
- */
- int
- _fmtFdFlush(Fmt *f)
- {
- int n;
- n = (char*)f->to - (char*)f->start;
- if(n && write((int)f->farg, f->start, n) != n)
- return 0;
- f->to = f->start;
- return 1;
- }
- int
- vfprint(int fd, char *fmt, va_list args)
- {
- Fmt f;
- char buf[256];
- int n;
- fmtfdinit(&f, fd, buf, sizeof(buf));
- f.args = args;
- n = dofmt(&f, fmt);
- if(n > 0 && _fmtFdFlush(&f) == 0)
- return -1;
- return n;
- }
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