1 files changed, 76 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..0e06431
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,76 @@
+#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 *output;
+
+  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], &output, 10);
+      value = true;
+    }
+  }
+  if (value) {
+    if (result % 2 == 0) {
+      if (quiet) {
+        fprintf(stdout, "even\n");
+      }
+      return 0;
+    } else {
+      if (quiet) {
+        fprintf(stdout, "odd\n");
+      }
+      return 1;
+    }
+  }
+  return ERR;
+}