Linux/windows 字符串处理CString类

#include <ctype.h> #include <limits.h> #include "cdp_stringex.h" #include "cdp_templ.h" //#include "cdp_logger.h" namespace CDP { // 字符串的结尾字符 char g_CharNil = '\0'; CString g_EmptyString = ""; CString::CString() { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; } CString::CString(const CString& stringSrc) { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; if(AllocBuffer(stringSrc.GetLength())) { m_iLength = stringSrc.GetLength(); memcpy(m_pchData, (PCSTR)stringSrc, m_iLength + 1); } } CString::CString(char ch, int nLength) { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; if(AllocBuffer(nLength)) { m_iLength = nLength; if('\0' == ch) { m_iLength = 0; } memset(m_pchData, ch, nLength); m_pchData[m_iLength] = '\0'; } } CString::CString(const char* lpch, int nLength) { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; if(AllocBuffer(nLength)) { if(NULL != lpch) { memcpy(m_pchData, lpch, nLength); m_pchData[nLength] = '\0'; m_iLength = strlen(m_pchData); } } } CString::CString(const char* lpsz) { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; int nLength = SafeStrlen(lpsz); if(AllocBuffer(nLength)) { if(NULL != lpsz) { m_iLength = nLength; memcpy(m_pchData, lpsz, m_iLength); m_pchData[m_iLength] = '\0'; } } } CString::CString(int iValue) { m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; *this = iValue; } // 分配内存 // First time: alloc nLen + 1, after: 2 * nLen + 1 TBool CString::AllocBuffer(int nLen) { if(nLen <= 0) { return False; } if(NULL == m_pchData) { m_pchData = (char *)malloc(nLen + 1); if(NULL == m_pchData) { return False; } memset(m_pchData, 0, nLen + 1); m_iBufferLength = nLen + 1; return True; } else { if(m_iBufferLength >= nLen + 1) { return True; } int iBufferLength = nLen * 2 + 1; char* pszTmp = (char *)malloc(iBufferLength); if(NULL != pszTmp) { memcpy(pszTmp, m_pchData, m_iBufferLength); memset(pszTmp + m_iBufferLength, 0, iBufferLength - m_iBufferLength); free(m_pchData); m_pchData = pszTmp; m_iBufferLength = iBufferLength; return True; } else { return False; } } } void CString::FreeData() { if(NULL != m_pchData) { free(m_pchData); } m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; } void CString::Release() { if(NULL != m_pchData) { free(m_pchData); } m_pchData = NULL; m_iLength = 0; m_iBufferLength = 0; } void CString::Empty() { if(NULL != m_pchData) { memset(m_pchData, 0, m_iBufferLength); m_iLength = 0; } } CString::~CString() { Release(); } void CString::SetValue(const char* lpch, int nLength) { if(0 == nLength || NULL == lpch) { Empty(); } if(AllocBuffer(nLength)) { memcpy(m_pchData, lpch, nLength); m_pchData[nLength] = '\0'; m_iLength = nLength; } } const CString& CString::operator=(const CString& stringSrc) { if(this == &stringSrc) { return *this; } int nLength = stringSrc.GetLength(); SetValue((PCSTR)stringSrc, nLength); return *this; } // 赋值操作 const CString& CString::operator=(const char* lpsz) { int nLength = SafeStrlen(lpsz); SetValue(lpsz, nLength); return *this; } const CString& CString::operator=(int iValue) { Format("%d", iValue); return *this; } // 字符串连接 void CString::ConcatCopy(int nSrc1Len, const char* lpszSrc1Data, int nSrc2Len, const char* lpszSrc2Data) { int nLength = nSrc1Len + nSrc2Len; if(nLength <= 0) { Empty(); } if(AllocBuffer(nLength)) { if(NULL != lpszSrc1Data && nSrc1Len > 0) { memcpy(m_pchData, lpszSrc1Data, nSrc1Len); } if(NULL != lpszSrc2Data && nSrc2Len > 0) { memcpy(m_pchData + nSrc1Len, lpszSrc2Data, nSrc2Len); } m_iLength = nLength; m_pchData[m_iLength] = '\0'; } } CString operator+(const CString& string1, const CString& string2) { CString s; s.ConcatCopy(string1.GetLength(), (PCSTR)string1, string2.GetLength(), (PCSTR)string2); return s; } CString operator+(const CString& string, const char* lpsz) { assert(lpsz == NULL || isValidStr(lpsz)); CString s; s.ConcatCopy(string.GetLength(), (PCSTR)string, CString::SafeStrlen(lpsz), lpsz); return s; } CString operator+(const char* lpsz, const CString& string) { assert(lpsz == NULL || isValidStr(lpsz)); CString s; s.ConcatCopy(CString::SafeStrlen(lpsz), lpsz, string.GetLength(), (PCSTR)string); return s; } void CString::Concat(int nSrcLen, const char* lpszSrcData) { // 不能连接空字符串 if (nSrcLen <= 0 || NULL == lpszSrcData) { return; } int nLength = m_iLength + nSrcLen; if(AllocBuffer(nLength)) { memcpy(m_pchData + m_iLength, lpszSrcData, nSrcLen); m_pchData[nLength] = '\0'; m_iLength = nLength; } } const CString& CString::operator+=(const char* lpsz) { Concat(SafeStrlen(lpsz), lpsz); return *this; } const CString& CString::operator+=(char ch) { Concat(1, &ch); return *this; } const CString& CString::operator+=(const CString& string) { Concat(string.GetLength(), string.m_pchData); return *this; } // 直接操作字符串内存的函数 char* CString::GetBuffer() { return m_pchData; } void CString::FreeExtra() { if(NULL == m_pchData || m_iLength >= m_iBufferLength - 1) { return; } if(0 == m_iLength) { this->Release(); return; } char* pszTmp = (char *)malloc(m_iLength + 1); if(NULL != pszTmp) { return; } else { memcpy(pszTmp, m_pchData, m_iLength); pszTmp[m_iLength] = '\0'; free(m_pchData); m_pchData = pszTmp; m_iBufferLength = m_iLength + 1; } } // 字符串高级操作函数 // 查找操作 int CString::Find(char ch) const { return Find(ch, 0); } int CString::Find(char ch, int nStart) const { if (nStart >= m_iLength) return -1; // find first single character char* lpsz = strchr(m_pchData + nStart, (unsigned char)ch); // return -1 if not found and index otherwise return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } int CString::FindOneOf(const char* lpszCharSet) const { if(NULL == lpszCharSet) { return NULL; } char* lpsz = strpbrk(m_pchData, lpszCharSet); return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } int CString::ReverseFind(char ch) const { // find last single character char* lpsz = strrchr(m_pchData, (unsigned char) ch); // return -1 if not found, distance from beginning otherwise return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } // 子串查找 int CString::Find(const char* lpszSub) const { return Find(lpszSub, 0); } int CString::Find(const char* lpszSub, int nStart) const { if(NULL == lpszSub) { return -1; } if (nStart > m_iLength) return -1; // 查找第一个匹配的字符串 char* lpsz = strstr(m_pchData + nStart, lpszSub); // -1表示没有找到 return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } void CString::MakeUpper() { //CopyBeforeWrite(); CStrOP::ToUpper(m_pchData); } void CString::MakeLower() { //CopyBeforeWrite(); CStrOP::ToLower(m_pchData); } void CString::MakeReverse() { //CopyBeforeWrite(); CStrOP::Reverse(m_pchData); } void CString::SetAt(int nIndex, char ch) { if(nIndex < 0 || nIndex >= m_iLength) { return; } //CopyBeforeWrite(); m_pchData[nIndex] = ch; if(ch == '\0') { m_iLength = nIndex; } } // 赋值操作 const CString& CString::operator=(char ch) { SetValue(&ch, 1); return *this; } // 字符串和字符连接运算符 // String + ch CString operator+(const CString& string1, char ch) { CString s = string1; s.Concat(1, &ch); return s; } // ch