Renamed input buffer to history

history.c

@@ -0,0 +1,69 @@
+/* 
+ * history.c
+ *
+ * Copyright (C) 2012 James Booth <boothj5@gmail.com>
+ * 
+ * This file is part of Profanity.
+ *
+ * Profanity 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.
+ *
+ * Profanity 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 Profanity.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <string.h>
+
+#define MAX_HISTORY 100
+
+static char *_history[MAX_HISTORY];
+static int _size;
+static int _pos;
+
+void history_init(void)
+{
+    _size = 0;
+    _pos = -1;
+}
+
+void history_append(char *inp)
+{
+    if (_size < MAX_HISTORY) {
+        _history[_size] = (char*) malloc(strlen(inp) * sizeof(char));
+        strcpy(_history[_size], inp);
+        _pos = _size;
+        _size++;
+    }
+}
+
+char *history_previous(void)
+{
+    if (_size == 0 || _pos == -1)
+        return NULL;
+
+    return _history[_pos--];
+}
+
+char *history_next(void)
+{
+    if (_size == 0)
+        return NULL;
+    if (_pos == (_size - 1))
+        return NULL;
+    if (_pos + 2 >= _size)
+        return NULL;
+    
+    int pos = _pos + 2;
+    _pos++;
+ 
+    return _history[pos];
+}
+