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Annotation of 42BSD/usr.lib/libU77/ftell_.c, revision 1.1.1.1

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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