1 /* Fastest version of wc: add rules to pick up newlines, too */ 2 3 ws [ \t] 4 nonws [^ \t\n] 5 word {ws}*{nonws}+ 6 words {word}{ws}+ 7 8 %option main noyywrap 9 %% 10 int cc = 0, wc = 0, lc = 0; 11 12 {word}{ws}* ++wc; cc += yyleng; 13 {word}{ws}*\n ++wc; cc += yyleng; ++lc; 14 {words}{word}{ws}* wc += 2; cc += yyleng; 15 {words}{word}{ws}*\n wc += 2; cc += yyleng; ++lc; 16 {words}{2}{word}{ws}* wc += 3; cc += yyleng; 17 {words}{2}{word}{ws}*\n wc += 3; cc += yyleng; ++lc; 18 {words}{3}{word}{ws}* wc += 4; cc += yyleng; 19 {words}{3}{word}{ws}*\n wc += 4; cc += yyleng; ++lc; 20 21 {ws}+ cc += yyleng; 22 23 \n+ cc += yyleng; lc += yyleng; 24 25 <<EOF>> { 26 printf( "%8d %8d %8d\n", lc, wc, cc ); 27 yyterminate(); 28 } 29