1 files changed, 229 insertions, 0 deletions
diff --git a/vcl/source/fontsubset/list.cxx b/vcl/source/fontsubset/list.cxx
new file mode 100644
index 000000000..aca585678
--- /dev/null
+++ b/vcl/source/fontsubset/list.cxx
@@ -0,0 +1,229 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/*[]---------------------------------------------------[]*/
+/*|                                                     |*/
+/*|     list.c - bidirectional list class               |*/
+/*|                                                     |*/
+/*|                                                     |*/
+/*|  Author: Alexander Gelfenbain                       |*/
+/*[]---------------------------------------------------[]*/
+
+#include <assert.h>
+#include <cstdlib>
+
+#include "list.h"
+
+namespace {
+
+/*- private data types */
+struct lnode {
+    struct lnode *next;
+    struct lnode *prev;
+
+    void *value;
+
+};
+
+}
+
+struct list_ {
+    lnode *head, *tail, *cptr;
+    size_t aCount;
+    list_destructor eDtor;
+};
+
+/*- private methods */
+
+static lnode *newNode(void *el)
+{
+    lnode *ptr = static_cast<lnode *>(std::malloc(sizeof(lnode)));
+    assert(ptr != nullptr);
+
+    ptr->value = el;
+
+    return ptr;
+}
+
+static lnode *appendPrim(list pThis, void *el)
+{
+    lnode *ptr = newNode(el);
+    lnode **flink, *blink;
+
+    if (pThis->tail != nullptr) {
+        flink = &(pThis->tail->next);
+        blink = pThis->tail;
+    } else {
+        flink = &pThis->head;
+        blink = nullptr;
+        pThis->cptr = ptr;                         /*- list was empty - set current to this element */
+    }
+
+    *flink  = ptr;
+    pThis->tail = ptr;
+
+    ptr->prev = blink;
+    ptr->next = nullptr;
+
+    pThis->aCount++;
+    return ptr;
+}
+
+/*- public methods  */
+list listNewEmpty()                           /*- default ctor */
+{
+    list pThis = static_cast<list>(std::malloc(sizeof(struct list_)));
+    assert(pThis != nullptr);
+
+    pThis->aCount = 0;
+    pThis->eDtor = nullptr;
+    pThis->head = pThis->tail = pThis->cptr = nullptr;
+
+    return pThis;
+}
+
+void listDispose(list pThis)                       /*- dtor */
+{
+    assert(pThis != nullptr);
+    listClear(pThis);
+    std::free(pThis);
+}
+
+void listSetElementDtor(list pThis, list_destructor f)
+{
+    assert(pThis != nullptr);
+    pThis->eDtor = f;
+}
+
+/* calling this function on an empty list is a run-time error */
+void *listCurrent(list pThis)
+{
+    assert(pThis != nullptr);
+    assert(pThis->cptr != nullptr);
+    return pThis->cptr->value;
+}
+
+int   listCount(list pThis)
+{
+    assert(pThis != nullptr);
+    return pThis->aCount;
+}
+
+int   listIsEmpty(list pThis)
+{
+    assert(pThis != nullptr);
+    return pThis->aCount == 0;
+}
+
+int    listNext(list pThis)
+{
+    return listSkipForward(pThis, 1);
+}
+
+int    listSkipForward(list pThis, int n)
+{
+    int m = 0;
+    assert(pThis != nullptr);
+
+    if (pThis->cptr == nullptr) return 0;
+
+    while (n != 0) {
+        if (pThis->cptr->next == nullptr) break;
+        pThis->cptr = pThis->cptr->next;
+        n--;
+        m++;
+    }
+    return m;
+}
+
+int    listToFirst(list pThis)
+{
+    assert(pThis != nullptr);
+
+    if (pThis->cptr != pThis->head) {
+        pThis->cptr = pThis->head;
+        return 1;
+    }
+    return 0;
+}
+
+int    listToLast(list pThis)
+{
+    assert(pThis != nullptr);
+
+    if (pThis->cptr != pThis->tail) {
+        pThis->cptr = pThis->tail;
+        return 1;
+    }
+    return 0;
+}
+
+list   listAppend(list pThis, void *el)
+{
+    assert(pThis != nullptr);
+
+    appendPrim(pThis, el);
+    return pThis;
+}
+
+list   listRemove(list pThis)
+{
+    lnode *ptr = nullptr;
+    if (pThis->cptr == nullptr) return pThis;
+
+    if (pThis->cptr->next != nullptr) {
+        ptr  = pThis->cptr->next;
+        pThis->cptr->next->prev = pThis->cptr->prev;
+    } else {
+        pThis->tail = pThis->cptr->prev;
+    }
+
+    if (pThis->cptr->prev != nullptr) {
+        if (ptr == nullptr) ptr = pThis->cptr->prev;
+        pThis->cptr->prev->next = pThis->cptr->next;
+    } else {
+        pThis->head = pThis->cptr->next;
+    }
+
+    if (pThis->eDtor) pThis->eDtor(pThis->cptr->value);        /* call the dtor callback */
+
+    std::free(pThis->cptr);
+    pThis->aCount--;
+    pThis->cptr = ptr;
+    return pThis;
+}
+
+list   listClear(list pThis)
+{
+    lnode *node = pThis->head, *ptr;
+
+    while (node) {
+        ptr = node->next;
+        if (pThis->eDtor) pThis->eDtor(node->value);           /* call the dtor callback */
+        std::free(node);
+        pThis->aCount--;
+        node = ptr;
+    }
+
+    pThis->head = pThis->tail = pThis->cptr = nullptr;
+    assert(pThis->aCount == 0);
+    return pThis;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */