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