#include "types.h"
#include "stat.h"
#include "user.h"

char buf[512];

void
wc(int fd, char *name)
{
    int i, n;
    int l, w, c, inword;
    
    l = w = c = 0;
    inword = 0;
    while((n = read(fd, buf, sizeof(buf))) > 0){
        for(i=0; i<n; i++){
            c++;
            if(buf[i] == '\n')
                l++;
            if(strchr(" \r\t\n\v", buf[i]))
                inword = 0;
            else if(!inword){
                w++;
                inword = 1;
            }
        }
    }
    if(n < 0){
        printf(1, "wc: read error\n");
        exit();
    }
    printf(1, "%d %d %d %s\n", l, w, c, name);
}

int
main(int argc, char *argv[])
{
    int fd, i;
    
    if(argc <= 1){
        wc(0, "");
        exit();
    }
    
    for(i = 1; i < argc; i++){
        if((fd = open(argv[i], 0)) < 0){
            printf(1, "wc: cannot open %s\n", argv[i]);
            exit();
        }
        wc(fd, argv[i]);
        close(fd);
    }
    exit();
}