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Annotation of 42BSD/usr.lib/libln/yyless.c, revision 1.1

1.1     ! root        1: /*     @(#)yyless.c    4.1     12/25/82        */
        !             2: 
        !             3: yyless(x)
        !             4: {
        !             5: extern char yytext[];
        !             6: register char *lastch, *ptr;
        !             7: extern int yyleng;
        !             8: extern int yyprevious;
        !             9: lastch = yytext+yyleng;
        !            10: if (x>=0 && x <= yyleng)
        !            11:        ptr = x + yytext;
        !            12: else
        !            13:        ptr = x;
        !            14: while (lastch > ptr)
        !            15:        yyunput(*--lastch);
        !            16: *lastch = 0;
        !            17: if (ptr >yytext)
        !            18:        yyprevious = *--lastch;
        !            19: yyleng = ptr-yytext;
        !            20: }

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