1 files changed, 109 insertions, 0 deletions
diff --git a/src/cli.c b/src/cli.c
new file mode 100644
index 0000000..9f4a6bd
--- /dev/null
+++ b/src/cli.c
@@ -0,0 +1,109 @@
+/* cli.c -- Code for providing a command-line interface.
+
+   Copyright (C) 2017 Jakob Tsar-Fox, All Rights Reserved.
+
+   This file is part of Nekopack.
+
+   Nekopack is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation, either version 3 of the License, or (at
+   your option) any later version.
+
+   Nekopack is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Nekopack. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <getopt.h>
+
+#include "cli.h"
+#include "crypto.h" /* New, maybe clean up the section on game crypto? */
+
+
+/* Returns a params structure parsed from `argv`. */
+struct params parse_args(int argc, char **argv) {
+    struct params p = {0};
+    
+    if (argc < 2) {
+        p.mode = USAGE;
+        return p;
+    }
+    p.mode = EXTRACT;
+    
+    int cur = 0, opt_index = 0, count = 0;
+    static struct option long_opts[] = {
+        {"help", no_argument, NULL, 'h'},
+        {"version", no_argument, NULL, 'v'},
+        {"quiet", no_argument, NULL, 'q'},
+        {"extract", no_argument, NULL, 'e'},
+        {"list", no_argument, NULL, 'l'},
+        {"output", no_argument, NULL, 'o'},
+        {"game", no_argument, NULL, 'g'},
+        {NULL, 0, NULL, 0}
+    };
+
+    do {
+        count++;
+        cur = getopt_long(argc, argv, "hvelqo:", long_opts, &opt_index);
+        switch (cur) {
+            case 'h':
+                p.mode = HELP;
+                return p;
+            case 'v':
+                p.mode = VERSION;
+                return p;
+            case 'q':
+                p.quiet = true;
+                break;
+            case 'o':
+                count++;
+                p.out_len = strlen(optarg);
+                p.out = malloc(p.out_len + 2);
+                strcpy(p.out, optarg);
+                if (p.out[p.out_len - 1] != '/')
+                    p.out[p.out_len] = '/';
+                break;
+            case 'g':
+                count++;
+                if (!strcmp(optarg, "nekopara_volume_0"))
+                    p.game = NEKOPARA_VOLUME_0;
+                else if (!strcmp(optarg, "nekopara_volume_0_steam"))
+                    p.game = NEKOPARA_VOLUME_0_STEAM;
+                else if (!strcmp(optarg, "nekopara_volume_1"))
+                    p.game = NEKOPARA_VOLUME_1;
+                else if (!strcmp(optarg, "nekopara_volume_1_steam"))
+                    p.game = NEKOPARA_VOLUME_1_STEAM;
+            case 'e':
+                p.mode = EXTRACT;
+                break;
+            case 'l':
+                p.mode = LIST;
+        }
+    } while (cur >= 0);
+
+    if (count == argc) {
+        p.mode = USAGE;
+        return p;
+    }
+    p.vararg_index = count;
+
+    if (p.out == NULL) {
+        p.out_len = 2;
+        p.out = malloc(3);
+        strcpy(p.out, "./");
+    }
+
+    return p;
+}
+
+
+/* Frees allocated memory associated with `p`. */
+void params_free(struct params p) {
+    free(p.out);
+}