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#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.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 total_lines;
int total_bytes;
int total_words;
};
int
wc(const char *filename, struct wc_values *data)
{
FILE *file = fopen(filename, "r");
if(file == NULL) {
fprintf(stderr, "wc: %s: %s\n", filename, strerror(errno));
return 1;
}
size_t c;
char buf;
int newlines, spaces, bytes = 0;
newlines = spaces = bytes = 0;
while((c = fread(&buf, 1, 1, file)) > 0) {
if(!isascii(buf))
buf = toascii(buf);
bytes++;
if(buf == '\n')
newlines++;
if(isspace(buf))
spaces++;
}
data->bytes = bytes;
data->lines = newlines;
data->words = spaces;
data->total_bytes += data->bytes;
data->total_lines += data->lines;
data->total_words += data->words;
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;
data.total_bytes = data.total_lines = data.total_words = 0;
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) {
return_value = wc("/dev/stdin", &data); /* lol */
print_values("stdin", data);
} else
for(int i = optind; i < argc; i++) {
if(argv[i][0] == '-' && argv[i][1] == '\0')
return_value = wc("/dev/stdin", &data);
else
return_value = wc(argv[i], &data);
if(return_value == 0)
print_values(argv[i], data);
}
if(argc > optind + 1)
printf("%i %i %i total\n",
data.total_lines,
data.total_words,
data.total_bytes);
return return_value;
}
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