122 lines
2.7 KiB
Text
122 lines
2.7 KiB
Text
%{
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/*
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* wc.lex : A simple example of using FLEX
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* to create a wc-like utility.
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*
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* See MISC/fastwc/ in the flex distribution for examples
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* of how to write this scanner for maximum performance.
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*/
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int numchars = 0;
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int numwords = 0;
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int numlines = 0;
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int totchars = 0;
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int totwords = 0;
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int totlines = 0;
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/*
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* rules start from here
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*/
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%}
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%%
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[\n] { numchars++; numlines++; }
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[\r] { numchars++; }
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[^ \t\n]+ { numwords++; numchars += yyleng; }
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. { numchars++; }
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%%
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/*
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* additional C code start from here. This supplies
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* all the argument processing etc.
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*/
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int main(int argc, char *argv[])
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{
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int loop,first=1;
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int lflag = 0; /* 1 if we count # of lines */
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int wflag = 0; /* 1 if we count # of words */
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int cflag = 0; /* 1 if we count # of characters */
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int fflag = 0; /* 1 if we have a file name */
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for(loop=1; loop<argc; loop++){
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if(argv[loop][0] == '-'){
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switch(argv[loop][1]){
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case 'l':
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lflag = 1;
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break;
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case 'w':
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wflag = 1;
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break;
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case 'c':
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cflag = 1;
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break;
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default:
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fprintf(stderr,"unknown option -%c\n",
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argv[loop][1]);
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}
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}
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}
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if(lflag == 0 && wflag == 0 && cflag == 0){
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lflag = wflag = cflag = 1; /* default to all on */
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}
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for(loop=1; loop<argc; loop++){
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if(argv[loop][0] != '-'){
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fflag = 1;
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numlines = numchars = numwords = 0;
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if((yyin = fopen(argv[loop],"rb")) != NULL){
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if(first){
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first = 0;
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} else {
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YY_NEW_FILE;
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}
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(void) yylex();
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fclose(yyin);
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totwords += numwords;
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totchars += numchars;
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totlines += numlines;
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printf("file : %25s :",argv[loop]) ;
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if(lflag){
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fprintf(stdout,"lines %5d ",numlines);
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}
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if(cflag){
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fprintf(stdout,"characters %5d ",numchars);
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}
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if(wflag){
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fprintf(stdout,"words %5d ",numwords);
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}
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fprintf(stdout,"\n");
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}else{
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fprintf(stderr,"wc : file not found %s\n",argv[loop]);
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}
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}
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}
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if(!fflag){
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fprintf(stderr,"usage : wc [-l -w -c] file [file...]\n");
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fprintf(stderr,"-l = count lines\n");
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fprintf(stderr,"-c = count characters\n");
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fprintf(stderr,"-w = count words\n");
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exit(1);
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}
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for(loop=0;loop<79; loop++){
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fprintf(stdout,"-");
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}
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fprintf(stdout,"\n");
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fprintf(stdout,"total : %25s ","") ;
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if(lflag){
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fprintf(stdout,"lines %5d ",totlines);
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}
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if(cflag){
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fprintf(stdout,"characters %5d ",totchars);
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}
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if(wflag){
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fprintf(stdout,"words %5d ",totwords);
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}
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fprintf(stdout,"\n");
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return(0);
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}
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