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- #include <u.h>
- #include <libc.h>
- int
- vsnprint(char *buf, int len, char *fmt, va_list args)
- {
- Fmt f;
- if(len <= 0)
- return -1;
- f.runes = 0;
- f.start = buf;
- f.to = buf;
- f.stop = buf + len - 1;
- f.flush = nil;
- f.farg = nil;
- f.nfmt = 0;
- f.args = args;
- dofmt(&f, fmt);
- *(char*)f.to = '\0';
- return (char*)f.to - buf;
- }
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