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#include <stdio.h>
#include <ctype.h>
#include <getopt.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
int show_lines, show_words, show_bytes;
struct wc_values data;
struct wc_values
{
int lines;
int bytes;
int words;
};
int
wc(const char *filename, struct wc_values *data)
{
FILE *file = fopen(filename,"r");
if(file == NULL) {
fprintf(stderr,"error opening file %s: %s\n",
filename,
strerror(errno));
return -1;
}
char c;
int newlines, spaces, bytes = 0;
newlines = spaces = bytes = 0;
while((c = fgetc(file)) > 0)
{
bytes++;
if(c == '\n')
newlines++;
if(isspace(c))
spaces++;
}
data->bytes = bytes;
data->lines = newlines;
data->words = spaces;
fclose(file);
return 0;
}
void
print_values(const char *filename, struct wc_values data)
{
if(show_bytes && show_lines && show_words)
printf("%i %i %i",
data.lines,
data.words,
data.bytes);
else
{
if(!show_lines)
printf("%i ",data.lines);
if(!show_words)
printf("%i ",data.words);
if(!show_bytes)
printf("%i ",data.bytes);
}
printf(" %s\n",filename);
}
int
main(int argc, char *argv[])
{
int c;
struct wc_values data;
int return_value = 0; /* Please let me know a better name */
show_lines = show_words = show_bytes = 1;
/* Process arguments */
while((c = getopt(argc,argv,"lwcm")) > 0)
{
switch(c)
{
case 'l':
show_lines = 0;
break;
case 'w':
show_words = 0;
break;
case 'c':
case 'm':
show_bytes = 0;
break;
}
}
if(optind == argc)
{
wc("/dev/stdin",&data); /* lol */
print_values("stdin",data);
}
else for(int i = optind; i<argc; i++)
{
if(argv[i][0] == '-')
return_value = wc("/dev/stdin",&data);
else
return_value = wc(argv[i],&data);
if (return_value == 0)
print_values(argv[i],data);
}
return 0;
}
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