1 %{ 2 3 /* 4 * wc.lex : A simple example of using FLEX 5 * to create a wc-like utility. 6 * 7 * See MISC/fastwc/ in the flex distribution for examples 8 * of how to write this scanner for maximum performance. 9 */ 10 11 int numchars = 0; 12 int numwords = 0; 13 int numlines = 0; 14 int totchars = 0; 15 int totwords = 0; 16 int totlines = 0; 17 18 /* 19 * rules start from here 20 */ 21 22 %} 23 24 %% 25 26 [\n] { numchars++; numlines++; } 27 [\r] { numchars++; } 28 [^ \t\n]+ { numwords++; numchars += yyleng; } 29 . { numchars++; } 30 31 %% 32 33 /* 34 * additional C code start from here. This supplies 35 * all the argument processing etc. 36 */ 37 38 int main(int argc, char *argv[]) 39 { 40 int loop,first=1; 41 int lflag = 0; /* 1 if we count # of lines */ 42 int wflag = 0; /* 1 if we count # of words */ 43 int cflag = 0; /* 1 if we count # of characters */ 44 int fflag = 0; /* 1 if we have a file name */ 45 46 for(loop=1; loop<argc; loop++){ 47 if(argv[loop][0] == '-'){ 48 switch(argv[loop][1]){ 49 case 'l': 50 lflag = 1; 51 break; 52 case 'w': 53 wflag = 1; 54 break; 55 case 'c': 56 cflag = 1; 57 break; 58 default: 59 fprintf(stderr,"unknown option -%c\n", 60 argv[loop][1]); 61 } 62 } 63 } 64 if(lflag == 0 && wflag == 0 && cflag == 0){ 65 lflag = wflag = cflag = 1; /* default to all on */ 66 } 67 68 for(loop=1; loop<argc; loop++){ 69 if(argv[loop][0] != '-'){ 70 fflag = 1; 71 numlines = numchars = numwords = 0; 72 if((yyin = fopen(argv[loop],"rb")) != NULL){ 73 if(first){ 74 first = 0; 75 } else { 76 YY_NEW_FILE; 77 } 78 (void) yylex(); 79 fclose(yyin); 80 totwords += numwords; 81 totchars += numchars; 82 totlines += numlines; 83 printf("file : %25s :",argv[loop]) ; 84 if(lflag){ 85 fprintf(stdout,"lines %5d ",numlines); 86 } 87 if(cflag){ 88 fprintf(stdout,"characters %5d ",numchars); 89 } 90 if(wflag){ 91 fprintf(stdout,"words %5d ",numwords); 92 } 93 fprintf(stdout,"\n"); 94 }else{ 95 fprintf(stderr,"wc : file not found %s\n",argv[loop]); 96 } 97 } 98 } 99 if(!fflag){ 100 fprintf(stderr,"usage : wc [-l -w -c] file [file...]\n"); 101 fprintf(stderr,"-l = count lines\n"); 102 fprintf(stderr,"-c = count characters\n"); 103 fprintf(stderr,"-w = count words\n"); 104 exit(1); 105 } 106 for(loop=0;loop<79; loop++){ 107 fprintf(stdout,"-"); 108 } 109 fprintf(stdout,"\n"); 110 fprintf(stdout,"total : %25s ","") ; 111 if(lflag){ 112 fprintf(stdout,"lines %5d ",totlines); 113 } 114 if(cflag){ 115 fprintf(stdout,"characters %5d ",totchars); 116 } 117 if(wflag){ 118 fprintf(stdout,"words %5d ",totwords); 119 } 120 fprintf(stdout,"\n"); 121 return(0); 122 } 123