Return to nonnull.c CVS log

Up to [CSRG BSD Unix] / 43BSD / contrib / icon / operators

Annotation of 43BSD/contrib/icon/operators/nonnull.c, revision 1.1

1.1     ! root        1: #include "../h/rt.h"
        !             2: 
        !             3: /*
        !             4:  * \x - test x for non-null value.
        !             5:  */
        !             6: 
        !             7: nonnull(nargs, arg1, arg0)
        !             8: int nargs;
        !             9: struct descrip arg1, arg0;
        !            10:    {
        !            11: 
        !            12:    DclSave
        !            13:    SetBound;
        !            14: 
        !            15:    /*
        !            16:     * If x is not null, it is returned, otherwise, the function fails.
        !            17:     *  Because the pre-dereference value of x is the return value (if
        !            18:     *  any), x is copied into arg0.
        !            19:     */
        !            20:    arg0 = arg1;
        !            21:    DeRef(arg1)
        !            22:    if (NULLDESC(arg1))
        !            23:       fail();
        !            24:    ClearBound;
        !            25:    }
        !            26: 
        !            27: Opblock(nonnull,1,"\\")

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.