1 files changed, 270 insertions, 0 deletions
diff --git a/intl/icu/source/common/ulist.c b/intl/icu/source/common/ulist.c
new file mode 100644
index 000000000..a31c60408
--- /dev/null
+++ b/intl/icu/source/common/ulist.c
@@ -0,0 +1,270 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+*   Copyright (C) 2009-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+******************************************************************************
+*/
+
+#include "ulist.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uenumimp.h"
+
+typedef struct UListNode UListNode;
+struct UListNode {
+    void *data;
+    
+    UListNode *next;
+    UListNode *previous;
+    
+    /* When data is created with uprv_malloc, needs to be freed during deleteList function. */
+    UBool forceDelete;
+};
+
+struct UList {
+    UListNode *curr;
+    UListNode *head;
+    UListNode *tail;
+    
+    int32_t size;
+};
+
+static void ulist_addFirstItem(UList *list, UListNode *newItem);
+
+U_CAPI UList *U_EXPORT2 ulist_createEmptyList(UErrorCode *status) {
+    UList *newList = NULL;
+    
+    if (U_FAILURE(*status)) {
+        return NULL;
+    }
+    
+    newList = (UList *)uprv_malloc(sizeof(UList));
+    if (newList == NULL) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return NULL;
+    }
+    
+    newList->curr = NULL;
+    newList->head = NULL;
+    newList->tail = NULL;
+    newList->size = 0;
+    
+    return newList;
+}
+
+/*
+ * Function called by addItemEndList or addItemBeginList when the first item is added to the list.
+ * This function properly sets the pointers for the first item added.
+ */
+static void ulist_addFirstItem(UList *list, UListNode *newItem) {
+    newItem->next = NULL;
+    newItem->previous = NULL;
+    list->head = newItem;
+    list->tail = newItem;
+}
+
+static void ulist_removeItem(UList *list, UListNode *p) {
+    if (p->previous == NULL) {
+        // p is the list head.
+        list->head = p->next;
+    } else {
+        p->previous->next = p->next;
+    }
+    if (p->next == NULL) {
+        // p is the list tail.
+        list->tail = p->previous;
+    } else {
+        p->next->previous = p->previous;
+    }
+    if (p == list->curr) {
+        list->curr = p->next;
+    }
+    --list->size;
+    if (p->forceDelete) {
+        uprv_free(p->data);
+    }
+    uprv_free(p);
+}
+
+U_CAPI void U_EXPORT2 ulist_addItemEndList(UList *list, const void *data, UBool forceDelete, UErrorCode *status) {
+    UListNode *newItem = NULL;
+    
+    if (U_FAILURE(*status) || list == NULL || data == NULL) {
+        if (forceDelete) {
+            uprv_free((void *)data);
+        }
+        return;
+    }
+    
+    newItem = (UListNode *)uprv_malloc(sizeof(UListNode));
+    if (newItem == NULL) {
+        if (forceDelete) {
+            uprv_free((void *)data);
+        }
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    newItem->data = (void *)(data);
+    newItem->forceDelete = forceDelete;
+    
+    if (list->size == 0) {
+        ulist_addFirstItem(list, newItem);
+    } else {
+        newItem->next = NULL;
+        newItem->previous = list->tail;
+        list->tail->next = newItem;
+        list->tail = newItem;
+    }
+    
+    list->size++;
+}
+
+U_CAPI void U_EXPORT2 ulist_addItemBeginList(UList *list, const void *data, UBool forceDelete, UErrorCode *status) {
+    UListNode *newItem = NULL;
+    
+    if (U_FAILURE(*status) || list == NULL || data == NULL) {
+        if (forceDelete) {
+            uprv_free((void *)data);
+        }
+        return;
+    }
+    
+    newItem = (UListNode *)uprv_malloc(sizeof(UListNode));
+    if (newItem == NULL) {
+        if (forceDelete) {
+            uprv_free((void *)data);
+        }
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    newItem->data = (void *)(data);
+    newItem->forceDelete = forceDelete;
+    
+    if (list->size == 0) {
+        ulist_addFirstItem(list, newItem);
+    } else {
+        newItem->previous = NULL;
+        newItem->next = list->head;
+        list->head->previous = newItem;
+        list->head = newItem;
+    }
+    
+    list->size++;
+}
+
+U_CAPI UBool U_EXPORT2 ulist_containsString(const UList *list, const char *data, int32_t length) {
+    if (list != NULL) {
+        const UListNode *pointer;
+        for (pointer = list->head; pointer != NULL; pointer = pointer->next) {
+            if (length == uprv_strlen(pointer->data)) {
+                if (uprv_memcmp(data, pointer->data, length) == 0) {
+                    return TRUE;
+                }
+            }
+        }
+    }
+    return FALSE;
+}
+
+U_CAPI UBool U_EXPORT2 ulist_removeString(UList *list, const char *data) {
+    if (list != NULL) {
+        UListNode *pointer;
+        for (pointer = list->head; pointer != NULL; pointer = pointer->next) {
+            if (uprv_strcmp(data, pointer->data) == 0) {
+                ulist_removeItem(list, pointer);
+                // Remove only the first occurrence, like Java LinkedList.remove(Object).
+                return TRUE;
+            }
+        }
+    }
+    return FALSE;
+}
+
+U_CAPI void *U_EXPORT2 ulist_getNext(UList *list) {
+    UListNode *curr = NULL;
+    
+    if (list == NULL || list->curr == NULL) {
+        return NULL;
+    }
+    
+    curr = list->curr;
+    list->curr = curr->next;
+    
+    return curr->data;
+}
+
+U_CAPI int32_t U_EXPORT2 ulist_getListSize(const UList *list) {
+    if (list != NULL) {
+        return list->size;
+    }
+    
+    return -1;
+}
+
+U_CAPI void U_EXPORT2 ulist_resetList(UList *list) {
+    if (list != NULL) {
+        list->curr = list->head;
+    }
+}
+
+U_CAPI void U_EXPORT2 ulist_deleteList(UList *list) {
+    UListNode *listHead = NULL;
+
+    if (list != NULL) {
+        listHead = list->head;
+        while (listHead != NULL) {
+            UListNode *listPointer = listHead->next;
+
+            if (listHead->forceDelete) {
+                uprv_free(listHead->data);
+            }
+
+            uprv_free(listHead);
+            listHead = listPointer;
+        }
+        uprv_free(list);
+        list = NULL;
+    }
+}
+
+U_CAPI void U_EXPORT2 ulist_close_keyword_values_iterator(UEnumeration *en) {
+    if (en != NULL) {
+        ulist_deleteList((UList *)(en->context));
+        uprv_free(en);
+    }
+}
+
+U_CAPI int32_t U_EXPORT2 ulist_count_keyword_values(UEnumeration *en, UErrorCode *status) {
+    if (U_FAILURE(*status)) {
+        return -1;
+    }
+    
+    return ulist_getListSize((UList *)(en->context));
+}
+
+U_CAPI const char * U_EXPORT2 ulist_next_keyword_value(UEnumeration *en, int32_t *resultLength, UErrorCode *status) {
+    const char *s;
+    if (U_FAILURE(*status)) {
+        return NULL;
+    }
+
+    s = (const char *)ulist_getNext((UList *)(en->context));
+    if (s != NULL && resultLength != NULL) {
+        *resultLength = uprv_strlen(s);
+    }
+    return s;
+}
+
+U_CAPI void U_EXPORT2 ulist_reset_keyword_values_iterator(UEnumeration *en, UErrorCode *status) {
+    if (U_FAILURE(*status)) {
+        return ;
+    }
+    
+    ulist_resetList((UList *)(en->context));
+}
+
+U_CAPI UList * U_EXPORT2 ulist_getListFromEnum(UEnumeration *en) {
+    return (UList *)(en->context);
+}