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Annotation of 43BSD/contrib/icon/functions/trim.c, revision 1.1

1.1     ! root        1: #include "../h/rt.h"
        !             2: 
        !             3: /*
        !             4:  * trim(s,c) - trim trailing characters in c from s.
        !             5:  */
        !             6: 
        !             7: Xtrim(nargs, arg2, arg1, arg0)
        !             8: int nargs;
        !             9: struct descrip arg2, arg1, arg0;
        !            10:    {
        !            11:    char *sloc;
        !            12:    char sbuf[MAXSTRING];
        !            13:    int *cs, csbuf[CSETSIZE];
        !            14:    static int spcset[CSETSIZE] = /* just a blank */
        !            15:       cset_display(0, 0, 01, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
        !            16: 
        !            17:    /*
        !            18:     * s must be a string; c defaults to a cset containing a blank.
        !            19:     */
        !            20:    if (cvstr(&arg1, sbuf) == NULL)
        !            21:       runerr(103, &arg1);
        !            22:    defcset(&arg2, &cs, csbuf, spcset);
        !            23: 
        !            24:    /*
        !            25:     * Start at the end of s and then back up until a character that is
        !            26:     *  not in c is found.  The actual trimming is done by having a descriptor
        !            27:     *  that points at the string of s, but has a reduced length.
        !            28:     */
        !            29:    arg0 = arg1;
        !            30:    sloc = STRLOC(arg1) + STRLEN(arg1) - 1;
        !            31:    while (sloc >= STRLOC(arg1) && tstb(*sloc, cs)) {
        !            32:       sloc--;
        !            33:       STRLEN(arg0)--;
        !            34:       }
        !            35:    }
        !            36: 
        !            37: Procblock(trim,2)

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