third_party/ulib/musl/src/stdio/__toread.c

#include <stdio_impl.h>

int __toread(FILE* f) {
    f->mode |= f->mode - 1;
    if (f->wpos > f->wbase)
        f->write(f, 0, 0);
    f->wpos = f->wbase = f->wend = 0;
    if (f->flags & F_NORD) {
        f->flags |= F_ERR;
        return EOF;
    }
    f->rpos = f->rend = f->buf + f->buf_size;
    return (f->flags & F_EOF) ? EOF : 0;
}