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Annotation of 42BSD/usr.lib/libln/yyless.c, revision 1.1.1.1

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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