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 %% 9 int cc = 0, wc = 0, lc = 0; 10 11 {word}{ws}* ++wc; cc += yyleng; 12 {word}{ws}*\n ++wc; cc += yyleng; ++lc; 13 {words}{word}{ws}* wc += 2; cc += yyleng; 14 {words}{word}{ws}*\n wc += 2; cc += yyleng; ++lc; 15 {words}{2}{word}{ws}* wc += 3; cc += yyleng; 16 {words}{2}{word}{ws}*\n wc += 3; cc += yyleng; ++lc; 17 {words}{3}{word}{ws}* wc += 4; cc += yyleng; 18 {words}{3}{word}{ws}*\n wc += 4; cc += yyleng; ++lc; 19 20 {ws}+ cc += yyleng; 21 22 \n+ cc += yyleng; lc += yyleng; 23 24 <<EOF>> { 25 printf( "%8d %8d %8d\n", lc, wc, cc ); 26 yyterminate(); 27 } 28
