src/libfmt/open.c


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#include "internal.h"

static int
flush(fmt·State *io)
{
    int n, fd;

    fd = (uintptr)io->file;
    n  = io->buffer.cur - io->buffer.beg;
    if(n && write(fd, io->buffer.beg, n) != n)
        return -1;

    io->buffer.cur  = io->buffer.beg;
    return io->n;
}

int
fmt·open(int fd, int len, char *buf, fmt·State *io)
{
    io->buffer.beg = buf;
    io->buffer.cur = buf;
    io->buffer.end = buf+len;
    io->flush = flush;
    io->file  = (void*)(uintptr)fd;
    io->flag  = 0;
    io->n     = 0;
    /* no heap needed */
    io->heap = nil;
    io->mem  = (mem·Reallocator){ 0 };

    fmt·setlocale(io, nil, nil, nil);

    return 0;
}