Merge pull request 'merge 14-argument-handler int command-line-interface' (#36) from 14-argument-handler into command-line-interface

Reviewed-on: #36

focussg.c

@@ -0,0 +1,88 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include "BlogDB.h"
+
+static int HelpMessage();
+static int VersionMessage();
+static int ShortArg(char currentArg[], int argIndex, char *argv[]);
+static int LongArg(char currentArg[], int argIndex, char *argv[]);
+
+
+int HelpMessage()
+{
+    printf("Usage: focussg [OPTION]\n");
+    printf("FoCuSSG (Fordsmand's C Static Site Generator)\n");
+    printf("\n");
+    printf("  -h, --help       Show this help message.\n");
+    printf("  -V, --version    Show the version number of FoCuSSG.\n");
+    exit(0);
+}
+
+int VersionMessage()
+{
+    printf("Pre-Release\n");
+    exit(0);
+}
+
+int ShortArg(char currentArg[], int argIndex, char *argv[])
+{
+    char* options;
+    options = &currentArg[1];
+
+    int count = strlen(options);
+
+    if (count == 0) { HelpMessage(); exit(0); }
+
+    for (int i = 0; i < count; ++i) {
+        switch (options[i]) {
+            case 'h':
+                HelpMessage();
+                break;
+            case 'V':
+                VersionMessage();
+                break;
+            case 0: // Missing character, should never happen
+                exit(1);
+                break;
+            default:
+                HelpMessage();
+                break;
+        }
+    }
+}
+
+int LongArg(char currentArg[], int argIndex, char *argv[])
+{
+    char* option;
+    option = &currentArg[2];
+
+    if (strcmp(option, "help") == 0) 
+        HelpMessage();
+    else if (strcmp(option, "version") == 0) 
+        VersionMessage();
+    else if (strcmp(option, "") == 0) 
+        HelpMessage();
+    else 
+        HelpMessage();
+}
+
+
+int main(int argc, char *argv[])
+{
+    if (argc == 1) HelpMessage();
+
+    for (int i = 1; i < argc; ++i) 
+    {
+        if (argv[i][0] != '-') 
+            HelpMessage();
+        else if (argv[i][1] != '-') 
+            ShortArg(argv[i], i, argv);
+        else
+            LongArg(argv[i], i, argv);
+    }
+
+    return 0;
+}