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Annotation of 43BSD/contrib/icon/rt/defstr.c, revision 1.1.1.1

1.1       root        1: #include "../h/rt.h"
                      2: 
                      3: /*
                      4:  * defstr - if dp is null, default to def; otherwise, convert to string.
                      5:  *  *dp gets a descriptor for the resulting string.  buf is used as
                      6:  *  a scratch buffer for the conversion (if necessary).
                      7:  */
                      8: 
                      9: defstr(dp, buf, def)
                     10: struct descrip *dp;
                     11: char *buf;
                     12: struct descrip *def;
                     13:    {
                     14:    DeRef(*dp)
                     15:    if (NULLDESC(*dp)) {
                     16:       *dp = *def;
                     17:       return 1;
                     18:       }
                     19:    if (cvstr(dp, buf) == NULL)
                     20:       runerr(103, dp);
                     21:    return 0;
                     22:    }

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