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