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136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is MPEG4IP.
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*
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* The Initial Developer of the Original Code is Cisco Systems Inc.
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* Portions created by Cisco Systems Inc. are
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* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
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*
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* Contributor(s):
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* Dave Mackie dmackie@cisco.com
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*/
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#ifndef __MP4_ARRAY_INCLUDED__
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#define __MP4_ARRAY_INCLUDED__
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typedef u_int32_t MP4ArrayIndex;
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class MP4Array {
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public:
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MP4Array() {
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m_numElements = 0;
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m_maxNumElements = 0;
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}
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inline bool ValidIndex(MP4ArrayIndex index) {
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if (m_numElements == 0 || index > m_numElements - 1) {
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return false;
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}
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return true;
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}
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inline MP4ArrayIndex Size(void) {
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return m_numElements;
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}
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inline MP4ArrayIndex MaxSize(void) {
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return m_maxNumElements;
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}
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protected:
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MP4ArrayIndex m_numElements;
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MP4ArrayIndex m_maxNumElements;
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};
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// macro to generate subclasses
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// we use this as an alternative to templates
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// due to the excessive compile time price of extensive template usage
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template <class type>
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class MP4TArray : public MP4Array
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{
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public:
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MP4TArray() {
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m_elements = NULL;
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}
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~MP4TArray() {
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MP4Free(m_elements);
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}
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inline void Add(type newElement) {
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Insert(newElement, m_numElements);
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}
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void Insert(type newElement, MP4ArrayIndex newIndex) {
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if (newIndex > m_numElements) {
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throw new MP4Error(ERANGE, "MP4Array::Insert");
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}
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if (m_numElements == m_maxNumElements) {
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m_maxNumElements = MAX(m_maxNumElements, 1) * 2;
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m_elements = (type*)MP4ReallocArray(m_elements,
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m_maxNumElements, sizeof(type));
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}
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memmove(&m_elements[newIndex + 1], &m_elements[newIndex],
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(m_numElements - newIndex) * sizeof(type));
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m_elements[newIndex] = newElement;
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m_numElements++;
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}
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void Delete(MP4ArrayIndex index) {
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if (!ValidIndex(index)) {
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throw new MP4Error(ERANGE, "MP4Array::Delete");
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}
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m_numElements--;
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if (index < m_numElements) {
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memmove(&m_elements[index], &m_elements[index + 1],
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(m_numElements - index) * sizeof(type));
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}
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}
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void Resize(MP4ArrayIndex newSize) {
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m_numElements = newSize;
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m_maxNumElements = newSize;
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m_elements = (type*)MP4ReallocArray(m_elements,
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m_maxNumElements, sizeof(type));
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}
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type& operator[](MP4ArrayIndex index) {
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if (!ValidIndex(index)) {
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throw new MP4Error(ERANGE, "index %u of %u", "MP4Array::[]", index, m_numElements);
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}
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return m_elements[index];
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}
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protected:
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type* m_elements;
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};
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#define MP4ARRAY_DECL(name, type) typedef MP4TArray<type> name##Array;
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MP4ARRAY_DECL(MP4Integer8, u_int8_t)
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MP4ARRAY_DECL(MP4Integer16, u_int16_t)
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MP4ARRAY_DECL(MP4Integer32, u_int32_t)
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MP4ARRAY_DECL(MP4Integer64, u_int64_t)
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MP4ARRAY_DECL(MP4Float32, float)
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MP4ARRAY_DECL(MP4Float64, double)
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MP4ARRAY_DECL(MP4String, char*)
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MP4ARRAY_DECL(MP4Bytes, u_int8_t*)
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#endif /* __MP4_ARRAY_INCLUDED__ */
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