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#include "./main.h"
void printhelp(void) {
fprintf(stderr, "even: a binary by ZachIR to check if a number is even or ");
fprintf(stderr, "odd.\n");
fprintf(stderr, "even [-hcv]\n");
fprintf(stderr, "even [--help]\n");
fprintf(stderr, "even [--copyright]\n");
fprintf(stderr, "even [--version]\n");
fprintf(stderr, "even [-q] [--quiet] NUMBER\n");
fprintf(stderr, "\t-h: prints this help message\n");
fprintf(stderr, "\t-c: prints the copyright information\n");
fprintf(stderr, "\t-v: prints the version\n");
fprintf(stderr, "\t-q: just uses error codes, no text\n");
return;
}
void printcopyright(void) {
fprintf(stderr, "Copyright (c) 2024 Zachary Smith\n");
fprintf(stderr, "even is Free software under the MIT license, and is ");
fprintf(stderr, "provided without warranty of any kind.\n");
return;
}
void printversion(void) {
fprintf(stderr, "even version %s, 2024\n", VERSION);
return;
}
int main(int argc, char **argv) {
bool quiet;
bool value;
long result;
quiet = false;
value = false;
result = 0;
char *end = NULL;
if (argc > 1) {
for (int i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'h':
printhelp();
return SUCCESS;
case 'c':
printcopyright();
return SUCCESS;
case 'v':
printversion();
return SUCCESS;
case 'q':
quiet = true;
break;
}
}
result = strtol(argv[i], &end, 10);
if ((end == argv[i]) || (end[0] != '\0')) {
fprintf(stderr, "Please provide an integer, not %s!\n", argv[i]);
return ERR;
}
value = true;
}
} else {
printhelp();
return ERR;
}
if (value) {
if (result % 2 == 0) {
if (!quiet) {
fprintf(stdout, "even\n");
}
return 0;
} else {
if (!quiet) {
fprintf(stdout, "odd\n");
return 0;
}
return 1;
}
}
return ERR;
}
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