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|
/*****************************************************************
|
| AP4 - Strings
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL 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 2, or (at your option)
| any later version.
|
| Bento4|GPL 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 Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4String.h"
#include "Ap4Types.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| AP4_String::EmptyString
+---------------------------------------------------------------------*/
char AP4_String::EmptyString = 0;
/*----------------------------------------------------------------------
| AP4_String::AP4_String
+---------------------------------------------------------------------*/
AP4_String::AP4_String() : m_Chars(&EmptyString), m_Length(0) {}
/*----------------------------------------------------------------------
| AP4_String::AP4_String
+---------------------------------------------------------------------*/
AP4_String::AP4_String(const char* s) {
if (s == NULL) {
m_Chars = &EmptyString;
m_Length = 0;
return;
}
m_Length = (AP4_Size)AP4_StringLength(s);
m_Chars = new char[m_Length+1];
AP4_CopyMemory(m_Chars, s, m_Length+1);
}
/*----------------------------------------------------------------------
| AP4_String::AP4_String
+---------------------------------------------------------------------*/
AP4_String::AP4_String(const char* s, AP4_Size size) :
m_Chars(new char[size+1]),
m_Length(size)
{
m_Chars[size] = 0;
AP4_CopyMemory(m_Chars, s, size);
}
/*----------------------------------------------------------------------
| AP4_String::AP4_String
+---------------------------------------------------------------------*/
AP4_String::AP4_String(const AP4_String& s) {
m_Length = s.m_Length;
m_Chars = new char[m_Length+1];
AP4_CopyMemory(m_Chars, s.m_Chars, m_Length+1);
}
/*----------------------------------------------------------------------
| AP4_String::AP4_String
+---------------------------------------------------------------------*/
AP4_String::AP4_String(AP4_Size size) {
m_Length = size;
m_Chars = new char[m_Length+1];
for (unsigned int i=0; i<size+1; i++) m_Chars[i] = 0;
}
/*----------------------------------------------------------------------
| AP4_String::~AP4_String
+---------------------------------------------------------------------*/
AP4_String::~AP4_String()
{
if (m_Chars != &EmptyString) delete[] m_Chars;
}
/*----------------------------------------------------------------------
| AP4_String::operator=
+---------------------------------------------------------------------*/
const AP4_String&
AP4_String::operator=(const AP4_String& s)
{
if (&s == this) return s;
if (m_Chars != &EmptyString) delete[] m_Chars;
m_Length = s.m_Length;
m_Chars = new char[m_Length+1];
AP4_CopyMemory(m_Chars, s.m_Chars, m_Length+1);
return *this;
}
/*----------------------------------------------------------------------
| AP4_String::operator=
+---------------------------------------------------------------------*/
const AP4_String&
AP4_String::operator=(const char* s)
{
if (s == NULL) {
if (m_Chars != &EmptyString) delete[] m_Chars;
m_Chars = &EmptyString;
m_Length = 0;
} else {
Assign(s, (AP4_Size)AP4_StringLength(s));
}
return *this;
}
/*----------------------------------------------------------------------
| AP4_String::operator==
+---------------------------------------------------------------------*/
bool
AP4_String::operator==(const AP4_String& s) const
{
if (m_Length != s.m_Length) return false;
for (unsigned int i=0; i<m_Length; i++) {
if (m_Chars[i] != s.m_Chars[i]) return false;
}
return true;
}
/*----------------------------------------------------------------------
| AP4_String::operator==
+---------------------------------------------------------------------*/
bool
AP4_String::operator==(const char* s) const
{
AP4_Size s_length = (AP4_Size)AP4_StringLength(s);
if (m_Length != s_length) return false;
for (unsigned int i=0; i<s_length; i++) {
if (m_Chars[i] != s[i]) return false;
}
return true;
}
/*----------------------------------------------------------------------
| AP4_String::Assign
+---------------------------------------------------------------------*/
void
AP4_String::Assign(const char* s, AP4_Size size)
{
if (m_Chars != &EmptyString) delete[] m_Chars;
m_Length = size;
m_Chars = new char[m_Length+1];
AP4_CopyMemory(m_Chars, s, m_Length);
m_Chars[size] = '\0';
}
/*----------------------------------------------------------------------
| AP4_String::Find
+---------------------------------------------------------------------*/
int
AP4_String::Find(char c, unsigned int start) const
{
const char* chars = GetChars();
for (unsigned int i=start; i<m_Length; i++) {
if (chars[i] == c) return i;
}
return -1;
}
|
