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Annotation of 42BSD/usr.lib/libU77/ftell_.c, revision 1.1

1.1     ! root        1: /*
        !             2: char id_ftell[] = "@(#)ftell_.c        1.2";
        !             3:  *
        !             4:  * return current file position
        !             5:  *
        !             6:  * calling sequence:
        !             7:  *     integer curpos, ftell
        !             8:  *     curpos = ftell(lunit)
        !             9:  * where:
        !            10:  *     lunit is an open logical unit
        !            11:  *     curpos will be the current offset in bytes from the start of the
        !            12:  *             file associated with that logical unit
        !            13:  *             or a (negative) system error code.
        !            14:  */
        !            15: 
        !            16: #include       "../libI77/fiodefs.h"
        !            17: #include       "../libI77/f_errno.h"
        !            18: 
        !            19: extern unit units[];
        !            20: 
        !            21: long ftell_(lu)
        !            22: long *lu;
        !            23: {
        !            24:        if (*lu < 0 || *lu >= MXUNIT)
        !            25:                return(-(long)(errno=F_ERUNIT));
        !            26:        if (!units[*lu].ufd)
        !            27:                return(-(long)(errno=F_ERNOPEN));
        !            28:        return(ftell(units[*lu].ufd));
        !            29: }

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