Initialisierung

lib/plist/ptrarray.c

@@ -0,0 +1,61 @@
+/*
+ * ptrarray.c
+ * simple pointer array implementation
+ *
+ * Copyright (c) 2011 Nikias Bassen, All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "ptrarray.h"
+
+ptrarray_t *ptr_array_new(int capacity)
+{
+	ptrarray_t *pa = (ptrarray_t*)malloc(sizeof(ptrarray_t));
+	pa->pdata = (void**)malloc(sizeof(void*) * capacity);
+	pa->capacity = capacity;
+	pa->capacity_step = (capacity > 4096) ? 4096 : capacity;
+	pa->len = 0;
+	return pa;
+}
+
+void ptr_array_free(ptrarray_t *pa)
+{
+	if (!pa) return;
+	if (pa->pdata) {
+		free(pa->pdata);
+	}
+	free(pa);
+}
+
+void ptr_array_add(ptrarray_t *pa, void *data)
+{
+	if (!pa || !pa->pdata || !data) return;
+	size_t remaining = pa->capacity-pa->len;
+	if (remaining == 0) {
+		pa->pdata = realloc(pa->pdata, sizeof(void*) * (pa->capacity + pa->capacity_step));
+		pa->capacity += pa->capacity_step;
+	}
+	pa->pdata[pa->len] = data;
+	pa->len++;
+}
+
+void* ptr_array_index(ptrarray_t *pa, size_t array_index)
+{
+	if (!pa) return NULL;
+	if (array_index >= pa->len) {
+		return NULL;
+	}
+	return pa->pdata[array_index];
+}