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