src/base/bufio/ungetc.c


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#include "internal.h"

int
bio·ungetc(io·Header *io)
{
    if(io->state == io·BufEnd)
        io->state = io·BufRdr;
    if(io->state != io·BufRdr)
        return io·BufEof;

    io->ilen--;
    return 0;
}