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simplify vdprintf implementation greatly based on recent vfprintf changes

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since vfprintf will provide a temporary buffer in the case where the
target FILE has a zero buffer size, don't bother setting up a real
buffer for vdprintf. this also allows us to skip the call to fflush
since we know everything will be written out before vfprintf returns.
This commit is contained in:
Rich Felker
2011-04-04 16:30:39 -04:00
parent bd57e2b43a
commit 98c5583ad5
1 changed files with 2 additions and 5 deletions
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7
src/stdio/vdprintf.c
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@ -7,13 +7,10 @@ static size_t wrap_write(FILE *f, const unsigned char *buf, size_t len)
int vdprintf(int fd, const char *fmt, va_list ap) int vdprintf(int fd, const char *fmt, va_list ap)
{ {
int r;
unsigned char buf[BUFSIZ];
FILE f = { FILE f = {
.fd = fd, .lbf = EOF, .write = wrap_write, .fd = fd, .lbf = EOF, .write = wrap_write,
.buf = buf+UNGET, .buf_size = sizeof buf - UNGET, .buf = (void *)fmt, .buf_size = 0,
.lock = -1 .lock = -1
}; };
r = vfprintf(&f, fmt, ap); return vfprintf(&f, fmt, ap);
return fflush(&f) ? EOF : r;
} }