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#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util/versie.h"
static void usage(FILE *f) {
fprintf(f,
"Gebruik: rn [-hV] [BESTAND]...\n"
"\n"
"Nummereer elke regel van elk BESTAND.\n"
"Als geen bestanden gegeven zijn, of het bestand is -, nummereer dan standaard invoer.\n"
"\n"
" -p Regelnummers per BESTAND.\n"
" -h Toon deze hulptekst\n"
" -V Toon versienummer\n");
}
// Returns pointer to argument array containing the file names
static char** parse_options(int argc, char **argv, bool *perFile) {
int opt;
while ((opt = getopt(argc, argv, "phV")) != -1) {
switch (opt) {
case 'p':
*perFile = true;
break;
case 'h':
usage(stdout);
exit(0);
case 'V':
drukkedoos_print_versie(stdout);
exit(0);
case '?':
usage(stderr);
exit(1);
}
}
return argv + optind;
}
static void process(const char *fname, FILE *file, bool perFile, size_t *n) {
if (perFile) *n = 1;
char *line = NULL;
size_t linen = 0;
ssize_t nread = 0;
while ((errno = 0, nread = getline(&line, &linen, file)) != -1) {
printf("%6lu %s", *n, line);
*n += 1;
}
free(line);
if (errno != 0) {
printf("tak: fout bij lezen uit bestand '%s'\n", fname);
exit(1);
}
}
int entry_rn(int argc, char **argv) {
bool perFile = false;
char **args = parse_options(argc, argv, &perFile);
size_t n = 1;
if (*args == NULL) {
process("stdin", stdin, perFile, &n);
return 0;
}
while (*args != NULL) {
if (!strcmp(*args, "-")) {
process("stdin", stdin, perFile, &n);
} else {
FILE *file = fopen(*args, "r");
if (file == NULL) {
fprintf(stderr, "rn: %s: kon bestand niet openen\n", *args);
return 1;
}
process(*args, file, perFile, &n);
fclose(file);
}
args++;
}
return 0;
}
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