sys/libfmt/vnsprint.c


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#include "internal.h"

int
fmt·vnsprint(int len, char *buf, char *fmt, va_list args)
{
    fmt·State io;

    if(len <= 0)
        return -1;

    io.n = 0;
    io.buffer.beg = io.buffer.cur = buf;
    io.buffer.end = buf+len-1;
    io.flush = nil;
    io.file  = nil;

    va_copy(io.args, args);

    fmt·setlocale(&io, nil, nil, nil);
    fmt·do(&io, fmt);

    va_end(io.args);

    *(io.buffer.cur) = 0;
    return io.buffer.cur - io.buffer.beg;
}