大佬教程收集整理的这篇文章主要介绍了关注SQLite,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
好久没有关注sqlite,这两天忽然想到它,就来看看,没想到sqlite都已经更新了好几版了。今天下了个最新的源代码,编译试试,发现编译dll后没lib文件,这让我有点郁闷,我再把以前我编译过的版本拿出来看看,靠,新的源码中竟然没提供def文件,怪不得搞不出lib文件。没撤,只好Google一下怎么搞出lib文件,以下是一种方法我们可以照葫芦画瓢。
来源于:http://code.js-code.com/article/p-yciibesb-bqv.html
VC中使用SQLite
sqlite官方下载只提供给我们一个sqlite3.dll跟一个sqlite3.def文件,并没有提供用于VC++6.0的lib文件,可以利用sqlite3.def文件生成,步骤如下:
1.将sqlite3.h(D:\sqlite-amalgamation-3_6_23.zip)拷贝到C:\Program files\Microsoft Visual studio\VC98\Include目录下,这时编译可通过,但链接错误,因为没有liB文件()
2.启动一个命令行程序,进入VC的安装目录C:\Program files\Microsoft Visual studio\VC98\Bin,在这个目录下面有一个liB.exe文件,使用它就能生成sqlite3.lib文件,将sqlite3.def文件放到相同目录,或者绝对路径也可以, 然后在命令行输入如下命令:
liB /MACHINE:IX86 /DEF:sqlite3.def
该命令生成两个文件:sqlite3.lib和sqlite3.exp
运行该命令时,如果提示找不到MSPDB60.DLL文件,可从其它目录拷贝至Bin目录下
3.将生成的sqlite3.lib拷贝到lib目录下,将sqlite3.dll拷贝到C:\WINNT\system32目录下
4.将sqlite3.lib加入到工程链接中,Project->SetTings,link选项卡,Object/library modules最后添入sqlite3.lib
D:\sqlitedll-3_6_23里有.dll和.def文件
生成的lib在bin下
这里还有一篇http://code.js-code.com/article/p-daizqzib-zk.html
sqlite毕竟是C的,我们使用起来比较麻烦不爽,现在都讲究面向对象,那我们就应该把它封装一下,唉,你想到的,别人早就做到了。这里有个sqlite C++的封装库,下载地址为http://www.sqlite.com.cn/Mysqlite/7/95.Html
//////////////////////////////////////////////////////////////////////////////// // Cppsqlite3 - A C++ wrapper around the sqlite3 embedded database library. // // copyright (C) 2004 Rob groves. All Rights Reserved. rob.groves@bTinternet.com // // Permission to use,copy,modify,and diStribute this software and its // documentation for any purpose,without fee,and without a written // agreement,is hereby granted,provIDed that the above copyright notice,// this paragraph and the following two paragraphs appear in all copIEs,// modifications,and diStributions. // // IN NO EVENT SHALL THE AUTHOR BE liABLE TO ANY PARTY FOR DIRECT,// INDIRECT,SPECIAL,INCIDENTAL,OR CONSEQUENTIAL damAGES,INCLUDING LOST // PROFITS,ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS documentATION,// EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBIliTY OF SUCH damAGE. // // THE AUTHOR SPECIFICALLY disCLAims ANY WARRANTIES,INCLUDING,BUT NOT // liMITED TO,THE IMPLIED WARRANTIES OF MERCHANTABIliTY AND fitness FOR A // PARTIculaR PURPOSE. THE SOFTWARE AND ACCOMPANYING documentATION,IF // ANY,PROVIDED HEREUNDER IS PROVIDED "AS IS". THE AUTHOR HAS NO OBliGATION // TO PROVIDE MAINTENANCE,SUPPORT,updatES,ENHANCEMENTS,OR MODIFICATIONs. // // V3.0 03/08/2004 -Initial Version for sqlite3 // // V3.1 16/09/2004 -Implemented getXXXXFIEld using sqlite3 functions // -Added CppsqliteDB3::tableExists() //////////////////////////////////////////////////////////////////////////////// #ifndef _Cppsqlite3_H_ #define _Cppsqlite3_H_ #include "sqlite3.h" #include <cstdio> #include <cString> #define CPP@R_749_5607@ERROR 1000 class Cppsqlite3Exception { public: Cppsqlite3Exception(const int nerrCode,char* szErrMess,bool bdeleteMsg=truE); Cppsqlite3Exception(const cppsqlite3Exception& E); virtual ~Cppsqlite3Exception(); const int errorCode() { return mnErrCode; } const char* errormessage() { return mpszErrMess; } static const char* errorCodeAsString(int nerrCodE); private: int mnErrCode; char* mpszErrMess; }; class Cppsqlite3Buffer { public: Cppsqlite3Buffer(); ~Cppsqlite3Buffer(); const char* format(const char* szFormat,...); operator const char*() { return mpBuf; } voID clear(); private: char* mpBuf; }; class Cppsqlite3Binary { public: Cppsqlite3Binary(); ~Cppsqlite3Binary(); voID setBinary(const unsigned char* pBuf,int nLen); voID setEncoded(const unsigned char* pBuf); const unsigned char* getEncoded(); const unsigned char* getBinary(); int getBinaryLength(); unsigned char* allocBuffer(int nLen); voID clear(); private: unsigned char* mpBuf; int mnBinaryLen; int mnBufferLen; int mnEncodedLen; bool mbEncoded; }; class Cppsqlite3query { public: Cppsqlite3query(); Cppsqlite3query(const cppsqlite3query& rquery); Cppsqlite3query(sqlite3* pDB,sqlite3_stmt* pVM,bool bEof,bool bOwnVM=truE); Cppsqlite3query& operator=(const cppsqlite3query& rquery); virtual ~Cppsqlite3query(); int numFIElds(); int fIEldindex(const char* szFIEld); const char* fIEldname(int nCol); const char* fIEldDeclType(int nCol); int fIEldDataType(int nCol); const char* fIEldValue(int nFIEld); const char* fIEldValue(const char* szFIEld); int geTintFIEld(int nFIEld,int nNullValue=0); int geTintFIEld(const char* szFIEld,int nNullValue=0); double getfloatFIEld(int nFIEld,double fNullValue=0.0); double getfloatFIEld(const char* szFIEld,double fNullValue=0.0); const char* getStringFIEld(int nFIEld,const char* szNullValue=""); const char* getStringFIEld(const char* szFIEld,const char* szNullValue=""); const unsigned char* getBlobFIEld(int nFIEld,int& nLen); const unsigned char* getBlobFIEld(const char* szFIEld,int& nLen); bool fIEldisNull(int nFIEld); bool fIEldisNull(const char* szFIEld); bool eof(); voID nextRow(); voID finalize(); private: voID checkVM(); sqlite3* mpDB; sqlite3_stmt* mpVM; bool mbEof; int mnCols; bool mbOwnVM; }; class Cppsqlite3table { public: Cppsqlite3table(); Cppsqlite3table(const cppsqlite3table& rtablE); Cppsqlite3table(char** paszResults,int nRows,int nCols); virtual ~Cppsqlite3table(); Cppsqlite3table& operator=(const cppsqlite3table& rtablE); int numFIElds(); int numRows(); const char* fIEldname(int nCol); const char* fIEldValue(int nFIEld); const char* fIEldValue(const char* szFIEld); int geTintFIEld(int nFIEld,const char* szNullValue=""); bool fIEldisNull(int nFIEld); bool fIEldisNull(const char* szFIEld); voID setRow(int nRow); voID finalize(); private: voID checkResults(); int mnCols; int mnRows; int mnCurrentRow; char** mpaszResults; }; class Cppsqlite3Statement { public: Cppsqlite3Statement(); Cppsqlite3Statement(const cppsqlite3Statement& rStatement); Cppsqlite3Statement(sqlite3* pDB,sqlite3_stmt* pVM); virtual ~Cppsqlite3Statement(); Cppsqlite3Statement& operator=(const cppsqlite3Statement& rStatement); int execDML(); Cppsqlite3query exeCQuery(); voID bind(int nParam,const char* szvalue); voID bind(int nParam,const int nvalue); voID bind(int nParam,const double DWvalue); voID bind(int nParam,const unsigned char* blobValue,int nLen); voID bindNull(int nParam); voID reset(); voID finalize(); private: voID checkDB(); voID checkVM(); sqlite3* mpDB; sqlite3_stmt* mpVM; }; class Cppsqlite3DB { public: Cppsqlite3DB(); virtual ~Cppsqlite3DB(); voID open(const char* szfilE); voID close(); bool tableExists(const char* sztablE); int execDML(const char* szSQL); Cppsqlite3query exeCQuery(const char* szSQL); int execScalar(const char* szSQL); Cppsqlite3table gettable(const char* szSQL); Cppsqlite3Statement compileStatement(const char* szSQL); @R_749_5607@int64 lastRowID(); voID interrupt() { sqlite3_interrupt(mpDB); } voID setBusyTimeout(int nR_474_11845@illisecs); static const char* sqliteVersion() { return @R_749_5607@VERSION; } private: Cppsqlite3DB(const cppsqlite3DB& db); Cppsqlite3DB& operator=(const cppsqlite3DB& db); sqlite3_stmt* compile(const char* szSQL); voID checkDB(); sqlite3* mpDB; int mnBusyTimeoutms; }; #endif
//////////////////////////////////////////////////////////////////////////////// // Cppsqlite3 - A C++ wrapper around the sqlite3 embedded database library. // // copyright (C) 2004 Rob groves. All Rights Reserved. rob.groves@bTinternet.com // // Permission to use,OR MODIFICATIONs. // // V3.0 03/08/2004 -Initial Version for sqlite3 // // V3.1 16/09/2004 -Implemented getXXXXFIEld using sqlite3 functions // -Added CppsqliteDB3::tableExists() //////////////////////////////////////////////////////////////////////////////// #include "Cppsqlite3.h" #include <cstdlib> // named constant for passing to Cppsqlite3Exception when passing it a String // that cAnnot be deleted. static const bool DONT_deletE_MSG=false; //////////////////////////////////////////////////////////////////////////////// // Prototypes for sqlite functions not included in sqlite DLL,but copIEd below // from sqlite encode.c //////////////////////////////////////////////////////////////////////////////// int sqlite3_encode_binary(const unsigned char *in,int n,unsigned char *out); int sqlite3_decode_binary(const unsigned char *in,unsigned char *out); //////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////// Cppsqlite3Exception::Cppsqlite3Exception(const int nerrCode,bool bdeleteMsg/*=true*/) : mnErrCode(nErrCodE) { mpszErrMess = sqlite3_mprintf("%s[%d]: %s",errorCodeAsString(nErrCodE),nErrCode,szErrMess ? szErrMess : ""); if (bdeleteMsg && szErrMess) { sqlite3_free(szErrMess); } } Cppsqlite3Exception::Cppsqlite3Exception(const cppsqlite3Exception& E) : mnErrCode(e.mnErrCodE) { mpszErrMess = 0; if (e.mpszErrMess) { mpszErrMess = sqlite3_mprintf("%s",e.mpszErrMess); } } const char* Cppsqlite3Exception::errorCodeAsString(int nerrCodE) { switch (nErrCodE) { case @R_749_5607@OK : return "@R_749_5607@OK"; case @R_749_5607@ERROR : return "@R_749_5607@ERROR"; case @R_749_5607@INTERNAL : return "@R_749_5607@INTERNAL"; case @R_749_5607@PERM : return "@R_749_5607@PERM"; case @R_749_5607@ABORT : return "@R_749_5607@ABORT"; case @R_749_5607@BUSY : return "@R_749_5607@BUSY"; case @R_749_5607@LOCKED : return "@R_749_5607@LOCKED"; case @R_749_5607@NOMEM : return "@R_749_5607@NOMEM"; case @R_749_5607@Readonly : return "@R_749_5607@Readonly"; case @R_749_5607@INTERRUPT : return "@R_749_5607@INTERRUPT"; case @R_749_5607@IOERR : return "@R_749_5607@IOERR"; case @R_749_5607@CORRUPT : return "@R_749_5607@CORRUPT"; case @R_749_5607@NOTFOUND : return "@R_749_5607@NOTFOUND"; case @R_749_5607@FulL : return "@R_749_5607@FulL"; case @R_749_5607@CANtopEN : return "@R_749_5607@CANtopEN"; case @R_749_5607@PROTOCol : return "@R_749_5607@PROTOCol"; case @R_749_5607@EMPTY : return "@R_749_5607@EMPTY"; case @R_749_5607@scheR_474_11845@A : return "@R_749_5607@scheR_474_11845@A"; case @R_749_5607@TOOBIG : return "@R_749_5607@TOOBIG"; case @R_749_5607@CONSTraiNT : return "@R_749_5607@CONSTraiNT"; case @R_749_5607@mIsmaTCH : return "@R_749_5607@mIsmaTCH"; case @R_749_5607@mISUSE : return "@R_749_5607@mISUSE"; case @R_749_5607@NolFS : return "@R_749_5607@NolFS"; case @R_749_5607@AUTH : return "@R_749_5607@AUTH"; case @R_749_5607@FORMAT : return "@R_749_5607@FORMAT"; case @R_749_5607@RANGE : return "@R_749_5607@RANGE"; case @R_749_5607@ROW : return "@R_749_5607@ROW"; case @R_749_5607@DONE : return "@R_749_5607@DONE"; case CPP@R_749_5607@ERROR : return "CPP@R_749_5607@ERROR"; default: return "UNKNowN_ERROR"; } } Cppsqlite3Exception::~Cppsqlite3Exception() { if (mpszErrMess) { sqlite3_free(mpszErrMess); mpszErrMess = 0; } } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3Buffer::Cppsqlite3Buffer() { mpBuf = 0; } Cppsqlite3Buffer::~Cppsqlite3Buffer() { clear(); } voID Cppsqlite3Buffer::clear() { if (mpBuf) { sqlite3_free(mpBuf); mpBuf = 0; } } const char* Cppsqlite3Buffer::format(const char* szFormat,...) { clear(); va_List va; va_start(va,szFormat); mpBuf = sqlite3_vmprintf(szFormat,va); va_end(va); return mpBuf; } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3Binary::Cppsqlite3Binary() : mpBuf(0),mnBinaryLen(0),mnBufferLen(0),mnEncodedLen(0),mbEncoded(false) { } Cppsqlite3Binary::~Cppsqlite3Binary() { clear(); } voID Cppsqlite3Binary::setBinary(const unsigned char* pBuf,int nLen) { mpBuf = allocBuffer(nLen); memcpy(mpBuf,pBuf,nLen); } voID Cppsqlite3Binary::setEncoded(const unsigned char* pBuf) { clear(); mnEncodedLen = strlen((const char*)pBuf); mnBufferLen = mnEncodedLen + 1; // Allow for NulL terminator mpBuf = (unsigned char*)malloc(mnBufferLen); if (!mpBuf) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"CAnnot allocate memory",DONT_deletE_MSG); } memcpy(mpBuf,mnBufferLen); mbEncoded = true; } const unsigned char* Cppsqlite3Binary::getEncoded() { if (!mbEncoded) { unsigned char* ptmp = (unsigned char*)malloc(mnBinaryLen); memcpy(ptmp,mpBuf,mnBinaryLen); mnEncodedLen = sqlite3_encode_binary(ptmp,mnBinaryLen,mpBuf); free(ptmp); mbEncoded = true; } return mpBuf; } const unsigned char* Cppsqlite3Binary::getBinary() { if (mbEncoded) { // in/out buffers can be the same mnBinaryLen = sqlite3_decode_binary(mpBuf,mpBuf); if (mnBinaryLen == -1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"CAnnot decode binary",DONT_deletE_MSG); } mbEncoded = false; } return mpBuf; } int Cppsqlite3Binary::getBinaryLength() { getBinary(); return mnBinaryLen; } unsigned char* Cppsqlite3Binary::allocBuffer(int nLen) { clear(); // Allow extra space for encoded binary as per comments in // sqlite encode.c See bottom of this file for implementation // of sqlite functions use 3 instead of 2 just to be sure ;-) mnBinaryLen = nLen; mnBufferLen = 3 + (257*nLen)/254; mpBuf = (unsigned char*)malloc(mnBufferLen); if (!mpBuf) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } mbEncoded = false; return mpBuf; } voID Cppsqlite3Binary::clear() { if (mpBuf) { mnBinaryLen = 0; mnBufferLen = 0; free(mpBuf); mpBuf = 0; } } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3query::Cppsqlite3query() { mpVM = 0; mbEof = true; mnCols = 0; mbOwnVM = false; } Cppsqlite3query::Cppsqlite3query(const cppsqlite3query& rquery) { mpVM = rquery.mpVM; // Only one object can own the VM const_cast<Cppsqlite3query&>(rquery).mpVM = 0; mbEof = rquery.mbEof; mnCols = rquery.mnCols; mbOwnVM = rquery.mbOwnVM; } Cppsqlite3query::Cppsqlite3query(sqlite3* pDB,bool bOwnVM/*=true*/) { mpDB = pDB; mpVM = pVM; mbEof = bEof; mnCols = sqlite3_column_count(mpVM); mbOwnVM = bOwnVM; } Cppsqlite3query::~Cppsqlite3query() { try { finalize(); } catch (...) { } } Cppsqlite3query& Cppsqlite3query::operator=(const cppsqlite3query& rquery) { try { finalize(); } catch (...) { } mpVM = rquery.mpVM; // Only one object can own the VM const_cast<Cppsqlite3query&>(rquery).mpVM = 0; mbEof = rquery.mbEof; mnCols = rquery.mnCols; mbOwnVM = rquery.mbOwnVM; return *this; } int Cppsqlite3query::numFIElds() { checkVM(); return mnCols; } const char* Cppsqlite3query::fIEldValue(int nFIEld) { checkVM(); if (nFIEld < 0 || nFIEld > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"InvalID fIEld index requested",DONT_deletE_MSG); } return (const char*)sqlite3_column_text(mpVM,nFIEld); } const char* Cppsqlite3query::fIEldValue(const char* szFIEld) { int nFIEld = fIEldindex(szFIEld); return (const char*)sqlite3_column_text(mpVM,nFIEld); } int Cppsqlite3query::geTintFIEld(int nFIEld,int nNullValue/*=0*/) { if (fIEldDataType(nFIEld) == @R_749_5607@NulL) { return nNullValue; } else { return sqlite3_column_int(mpVM,nFIEld); } } int Cppsqlite3query::geTintFIEld(const char* szFIEld,int nNullValue/*=0*/) { int nFIEld = fIEldindex(szFIEld); return geTintFIEld(nFIEld,nNullvalue); } double Cppsqlite3query::getfloatFIEld(int nFIEld,double fNullValue/*=0.0*/) { if (fIEldDataType(nFIEld) == @R_749_5607@NulL) { return fNullValue; } else { return sqlite3_column_double(mpVM,nFIEld); } } double Cppsqlite3query::getfloatFIEld(const char* szFIEld,double fNullValue/*=0.0*/) { int nFIEld = fIEldindex(szFIEld); return getfloatFIEld(nFIEld,fNullvalue); } const char* Cppsqlite3query::getStringFIEld(int nFIEld,const char* szNullValue/*=""*/) { if (fIEldDataType(nFIEld) == @R_749_5607@NulL) { return szNullValue; } else { return (const char*)sqlite3_column_text(mpVM,nFIEld); } } const char* Cppsqlite3query::getStringFIEld(const char* szFIEld,const char* szNullValue/*=""*/) { int nFIEld = fIEldindex(szFIEld); return getStringFIEld(nFIEld,szNullvalue); } const unsigned char* Cppsqlite3query::getBlobFIEld(int nFIEld,int& nLen) { checkVM(); if (nFIEld < 0 || nFIEld > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } nLen = sqlite3_column_bytes(mpVM,nFIEld); return (const unsigned char*)sqlite3_column_blob(mpVM,nFIEld); } const unsigned char* Cppsqlite3query::getBlobFIEld(const char* szFIEld,int& nLen) { int nFIEld = fIEldindex(szFIEld); return getBlobFIEld(nFIEld,nLen); } bool Cppsqlite3query::fIEldisNull(int nFIEld) { return (fIEldDataType(nFIEld) == @R_749_5607@null); } bool Cppsqlite3query::fIEldisNull(const char* szFIEld) { int nFIEld = fIEldindex(szFIEld); return (fIEldDataType(nFIEld) == @R_749_5607@null); } int Cppsqlite3query::fIEldindex(const char* szFIEld) { checkVM(); if (szFIEld) { for (int nFIEld = 0; nFIEld < mnCols; nFIEld++) { const char* szTemp = sqlite3_column_name(mpVM,nFIEld); if (strcmp(szFIEld,szTemp) == 0) { return nFIEld; } } } throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"InvalID fIEld name requested",DONT_deletE_MSG); } const char* Cppsqlite3query::fIEldname(int nCol) { checkVM(); if (nCol < 0 || nCol > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } return sqlite3_column_name(mpVM,nCol); } const char* Cppsqlite3query::fIEldDeclType(int nCol) { checkVM(); if (nCol < 0 || nCol > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } return sqlite3_column_decltype(mpVM,nCol); } int Cppsqlite3query::fIEldDataType(int nCol) { checkVM(); if (nCol < 0 || nCol > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } return sqlite3_column_type(mpVM,nCol); } bool Cppsqlite3query::eof() { checkVM(); return mbEof; } voID Cppsqlite3query::nextRow() { checkVM(); int nRet = sqlite3_step(mpVM); if (nRet == @R_749_5607@DONE) { // no rows mbEof = true; } else if (nRet == @R_749_5607@ROW) { // more rows,nothing to do } else { nRet = sqlite3_finalize(mpVM); mpVM = 0; const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,(char*)szError,DONT_deletE_MSG); } } voID Cppsqlite3query::finalize() { if (mpVM && mbOwnVM) { int nRet = sqlite3_finalize(mpVM); mpVM = 0; if (nRet != @R_749_5607@OK) { const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } } voID Cppsqlite3query::checkVM() { if (mpVM == 0) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"Null Virtual Machine pointer",DONT_deletE_MSG); } } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3table::Cppsqlite3table() { mpaszResults = 0; mnRows = 0; mnCols = 0; mnCurrentRow = 0; } Cppsqlite3table::Cppsqlite3table(const cppsqlite3table& rtablE) { mpaszResults = rtable.mpaszResults; // Only one object can own the results const_cast<Cppsqlite3table&>(rtablE).mpaszResults = 0; mnRows = rtable.mnRows; mnCols = rtable.mnCols; mnCurrentRow = rtable.mnCurrentRow; } Cppsqlite3table::Cppsqlite3table(char** paszResults,int nCols) { mpaszResults = paszResults; mnRows = nRows; mnCols = nCols; mnCurrentRow = 0; } Cppsqlite3table::~Cppsqlite3table() { try { finalize(); } catch (...) { } } Cppsqlite3table& Cppsqlite3table::operator=(const cppsqlite3table& rtablE) { try { finalize(); } catch (...) { } mpaszResults = rtable.mpaszResults; // Only one object can own the results const_cast<Cppsqlite3table&>(rtablE).mpaszResults = 0; mnRows = rtable.mnRows; mnCols = rtable.mnCols; mnCurrentRow = rtable.mnCurrentRow; return *this; } voID Cppsqlite3table::finalize() { if (mpaszResults) { sqlite3_free_table(mpaszResults); mpaszResults = 0; } } int Cppsqlite3table::numFIElds() { checkResults(); return mnCols; } int Cppsqlite3table::numRows() { checkResults(); return mnRows; } const char* Cppsqlite3table::fIEldValue(int nFIEld) { checkResults(); if (nFIEld < 0 || nFIEld > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } int nIndex = (mnCurrentRow*mnCols) + mnCols + nFIEld; return mpaszResults[nIndex]; } const char* Cppsqlite3table::fIEldValue(const char* szFIEld) { checkResults(); if (szFIEld) { for (int nFIEld = 0; nFIEld < mnCols; nFIEld++) { if (strcmp(szFIEld,mpaszResults[nFIEld]) == 0) { int nIndex = (mnCurrentRow*mnCols) + mnCols + nFIEld; return mpaszResults[nIndex]; } } } throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } int Cppsqlite3table::geTintFIEld(int nFIEld,int nNullValue/*=0*/) { if (fIEldisNull(nFIEld)) { return nNullValue; } else { return atoi(fIEldValue(nFIEld)); } } int Cppsqlite3table::geTintFIEld(const char* szFIEld,int nNullValue/*=0*/) { if (fIEldisNull(szFIEld)) { return nNullValue; } else { return atoi(fIEldValue(szFIEld)); } } double Cppsqlite3table::getfloatFIEld(int nFIEld,double fNullValue/*=0.0*/) { if (fIEldisNull(nFIEld)) { return fNullValue; } else { return atof(fIEldValue(nFIEld)); } } double Cppsqlite3table::getfloatFIEld(const char* szFIEld,double fNullValue/*=0.0*/) { if (fIEldisNull(szFIEld)) { return fNullValue; } else { return atof(fIEldValue(szFIEld)); } } const char* Cppsqlite3table::getStringFIEld(int nFIEld,const char* szNullValue/*=""*/) { if (fIEldisNull(nFIEld)) { return szNullValue; } else { return fIEldValue(nFIEld); } } const char* Cppsqlite3table::getStringFIEld(const char* szFIEld,const char* szNullValue/*=""*/) { if (fIEldisNull(szFIEld)) { return szNullValue; } else { return fIEldValue(szFIEld); } } bool Cppsqlite3table::fIEldisNull(int nFIEld) { checkResults(); return (fIEldValue(nFIEld) == 0); } bool Cppsqlite3table::fIEldisNull(const char* szFIEld) { checkResults(); return (fIEldValue(szFIEld) == 0); } const char* Cppsqlite3table::fIEldname(int nCol) { checkResults(); if (nCol < 0 || nCol > mnCols-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } return mpaszResults[nCol]; } voID Cppsqlite3table::setRow(int nRow) { checkResults(); if (nRow < 0 || nRow > mnRows-1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"InvalID row index requested",DONT_deletE_MSG); } mnCurrentRow = nRow; } voID Cppsqlite3table::checkResults() { if (mpaszResults == 0) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"Null Results pointer",DONT_deletE_MSG); } } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3Statement::Cppsqlite3Statement() { mpDB = 0; mpVM = 0; } Cppsqlite3Statement::Cppsqlite3Statement(const cppsqlite3Statement& rStatement) { mpDB = rStatement.mpDB; mpVM = rStatement.mpVM; // Only one object can own VM const_cast<Cppsqlite3Statement&>(rStatement).mpVM = 0; } Cppsqlite3Statement::Cppsqlite3Statement(sqlite3* pDB,sqlite3_stmt* pVM) { mpDB = pDB; mpVM = pVM; } Cppsqlite3Statement::~Cppsqlite3Statement() { try { finalize(); } catch (...) { } } Cppsqlite3Statement& Cppsqlite3Statement::operator=(const cppsqlite3Statement& rStatement) { mpDB = rStatement.mpDB; mpVM = rStatement.mpVM; // Only one object can own VM const_cast<Cppsqlite3Statement&>(rStatement).mpVM = 0; return *this; } int Cppsqlite3Statement::execDML() { checkDB(); checkVM(); const char* szError=0; int nRet = sqlite3_step(mpVM); if (nRet == @R_749_5607@DONE) { int nRowsChanged = sqlite3_changes(mpDB); nRet = sqlite3_reset(mpVM); if (nRet != @R_749_5607@OK) { szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } return nRowsChanged; } else { nRet = sqlite3_reset(mpVM); szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } Cppsqlite3query Cppsqlite3Statement::exeCQuery() { checkDB(); checkVM(); int nRet = sqlite3_step(mpVM); if (nRet == @R_749_5607@DONE) { // no rows return Cppsqlite3query(mpDB,mpVM,true/*eof*/,falsE); } else if (nRet == @R_749_5607@ROW) { // at least 1 row return Cppsqlite3query(mpDB,false/*eof*/,falsE); } else { nRet = sqlite3_reset(mpVM); const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } voID Cppsqlite3Statement::bind(int nParam,const char* szvalue) { checkVM(); int nRes = sqlite3_bind_text(mpVM,nParam,szValue,-1,@R_749_5607@TRANSIENT); if (nRes != @R_749_5607@OK) { throw Cppsqlite3Exception(nRes,"Error binding String param",const int nvalue) { checkVM(); int nRes = sqlite3_bind_int(mpVM,nvalue); if (nRes != @R_749_5607@OK) { throw Cppsqlite3Exception(nRes,"Error binding int param",const double dvalue) { checkVM(); int nRes = sqlite3_bind_double(mpVM,dvalue); if (nRes != @R_749_5607@OK) { throw Cppsqlite3Exception(nRes,"Error binding double param",int nLen) { checkVM(); int nRes = sqlite3_bind_blob(mpVM,(const void*)blobValue,nLen,"Error binding blob param",DONT_deletE_MSG); } } voID Cppsqlite3Statement::bindNull(int nParam) { checkVM(); int nRes = sqlite3_bind_null(mpVM,nParam); if (nRes != @R_749_5607@OK) { throw Cppsqlite3Exception(nRes,"Error binding NulL param",DONT_deletE_MSG); } } voID Cppsqlite3Statement::reset() { if (mpVM) { int nRet = sqlite3_reset(mpVM); if (nRet != @R_749_5607@OK) { const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } } voID Cppsqlite3Statement::finalize() { if (mpVM) { int nRet = sqlite3_finalize(mpVM); mpVM = 0; if (nRet != @R_749_5607@OK) { const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } } voID Cppsqlite3Statement::checkDB() { if (mpDB == 0) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"Database not open",DONT_deletE_MSG); } } voID Cppsqlite3Statement::checkVM() { if (mpVM == 0) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } } //////////////////////////////////////////////////////////////////////////////// Cppsqlite3DB::Cppsqlite3DB() { mpDB = 0; mnBusyTimeoutms = 60000; // 60 seconds } Cppsqlite3DB::Cppsqlite3DB(const cppsqlite3DB& db) { mpDB = db.mpDB; mnBusyTimeoutms = 60000; // 60 seconds } Cppsqlite3DB::~Cppsqlite3DB() { close(); } Cppsqlite3DB& Cppsqlite3DB::operator=(const cppsqlite3DB& db) { mpDB = db.mpDB; mnBusyTimeoutms = 60000; // 60 seconds return *this; } voID Cppsqlite3DB::open(const char* szfilE) { int nRet = sqlite3_open(szfile,&mpDB); if (nRet != @R_749_5607@OK) { const char* szError = sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } setBusyTimeout(mnBusyTimeoutms); } voID Cppsqlite3DB::close() { if (mpDB) { sqlite3_close(mpDB); mpDB = 0; } } Cppsqlite3Statement Cppsqlite3DB::compileStatement(const char* szSQL) { checkDB(); sqlite3_stmt* pVM = compile(szSQL); return Cppsqlite3Statement(mpDB,pVM); } bool Cppsqlite3DB::tableExists(const char* sztablE) { char szSQL[128]; sprintf(szSQL,"SELEct count(*) from sqlite_master where type='table' and name='%s'",sztablE); int nRet = execScalar(szSQL); return (nRet > 0); } int Cppsqlite3DB::execDML(const char* szSQL) { checkDB(); char* szError=0; int nRet = sqlite3_exec(mpDB,szSQL,&szError); if (nRet == @R_749_5607@OK) { return sqlite3_changes(mpDB); } else { throw Cppsqlite3Exception(nRet,szError); } } Cppsqlite3query Cppsqlite3DB::exeCQuery(const char* szSQL) { checkDB(); sqlite3_stmt* pVM = compile(szSQL); int nRet = sqlite3_step(pVM); if (nRet == @R_749_5607@DONE) { // no rows return Cppsqlite3query(mpDB,pVM,true/*eof*/); } else if (nRet == @R_749_5607@ROW) { // at least 1 row return Cppsqlite3query(mpDB,false/*eof*/); } else { nRet = sqlite3_finalize(pVM); const char* szError= sqlite3_errmsg(mpDB); throw Cppsqlite3Exception(nRet,DONT_deletE_MSG); } } int Cppsqlite3DB::execScalar(const char* szSQL) { Cppsqlite3query q = exeCQuery(szSQL); if (q.eof() || q.numFIElds() < 1) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,"InvalID scalar query",DONT_deletE_MSG); } return atoi(q.fIEldValue(0)); } Cppsqlite3table Cppsqlite3DB::gettable(const char* szSQL) { checkDB(); char* szError=0; char** paszResults=0; int nRet; int nRows(0); int nCols(0); nRet = sqlite3_get_table(mpDB,&paszResults,&nrows,&nCols,&szError); if (nRet == @R_749_5607@OK) { return Cppsqlite3table(paszResults,nRows,nCols); } else { throw Cppsqlite3Exception(nRet,szError); } } @R_749_5607@int64 Cppsqlite3DB::lastRowID() { return sqlite3_last_insert_rowID(mpDB); } voID Cppsqlite3DB::setBusyTimeout(int nR_474_11845@illisecs) { mnBusyTimeoutms = nMillisecs; sqlite3_busy_timeout(mpDB,mnBusyTimeoutms); } voID Cppsqlite3DB::checkDB() { if (!mpDB) { throw Cppsqlite3Exception(CPP@R_749_5607@ERROR,DONT_deletE_MSG); } } sqlite3_stmt* Cppsqlite3DB::compile(const char* szSQL) { checkDB(); char* szError=0; const char* szTail=0; sqlite3_stmt* pVM; int nRet = sqlite3_prepare(mpDB,&pVM,&szTail); if (nRet != @R_749_5607@OK) { throw Cppsqlite3Exception(nRet,szError); } return pVM; } //////////////////////////////////////////////////////////////////////////////// // sqlite encode.c reproduced here,containing implementation notes and source // for sqlite3_encode_binary() and sqlite3_decode_binary() //////////////////////////////////////////////////////////////////////////////// /* ** 2002 April 25 ** ** The author disclaims copyright to this source code. In place of ** a legal notice,here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely,never taking more than you give. ** ************************************************************************* ** This file contains Helper routInes used to translate binary data into ** a null-terminated String (suitable for use in sqlitE) and BACk again. ** these are convenIEnce routInes for use by people who want to store binary ** data in an sqlite database. The code in this file is not used by any other ** part of the sqlite library. ** ** $ID: encode.c,v 1.10 2004/01/14 21:59:23 drh Exp $ */ /* ** How This Encoder Works ** ** The output is allowed to contain any character except 0x27 (') and ** 0x00. This is accomplished by using an escape character to encode ** 0x27 and 0x00 as a two-byte sequence. The escape character is always ** 0x01. An 0x00 is encoded as the two byte sequence 0x01 0x01. The ** 0x27 character is encoded as the two byte sequence 0x01 0x03. Finally,** the escape character itself is encoded as the two-character sequence ** 0x01 0x02. ** ** To summarize,the encoder works by using an escape sequences as follows: ** ** 0x00 -> 0x01 0x01 ** 0x01 -> 0x01 0x02 ** 0x27 -> 0x01 0x03 ** ** If that were all the encoder dID,it would work,but in certain cases ** it Could double the size of the encoded String. For example,to ** encode a String of 100 0x27 characters would require 100 instances of ** the 0x01 0x03 escape sequence resulTing in a 200-character output. ** We would prefer to keep the size of the encoded String smaller than ** this. ** ** To minimize the enCoding size,we first add a fixed offset value to each ** byte in the sequence. The addition is modulo 256. (That is to say,if ** the sum of the original character value and the offset exceeds 256,then ** the higher order bits are truncated.) The offset is chosen to minimize ** the number of characters in the String that need to be escaped. For ** example,in the case above where the String was composed of 100 0x27 ** characters,the offset might be 0x01. Each of the 0x27 characters would ** then be converted into an 0x28 character which would not need to be ** escaped at all and so the 100 character input String would be converted ** into just 100 characters of output. Actually 101 characters of output - ** we have to record the offset used as the first byte in the sequence so ** that the String can be decoded. Since the offset value is stored as ** part of the output String and the output String is not allowed to contain ** characters 0x00 or 0x27,the offset cAnnot be 0x00 or 0x27. ** ** Here,then,are the enCoding steps: ** ** (1) Choose an offset value and make it the first character of ** output. ** ** (2) copy each input character into the output buffer,one by ** one,adding the offset value as you copy. ** ** (3) If the value of an input character plus offset is 0x00,replace ** that one character by the two-character sequence 0x01 0x01. ** If the sum is 0x01,replace it with 0x01 0x02. If the sum ** is 0x27,replace it with 0x01 0x03. ** ** (4) Put a 0x00 terminator at the end of the output. ** ** DeCoding is obvIoUs: ** ** (5) copy encoded characters except the first into the decode ** buffer. Set the first encoded character asIDe for use as ** the offset in step 7 below. ** ** (6) Convert each 0x01 0x01 sequencE into a single character 0x00. ** Convert 0x01 0x02 into 0x01. Convert 0x01 0x03 into 0x27. ** ** (7) Subtract the offset value that was the first character of ** the encoded buffer from all characters in the output buffer. ** ** The only tricky part is step (1) - how to compute an offset value to ** minimize the size of the output buffer. This is accomplished by tesTing ** all offset values and picking the one that results in the feWest number ** of escapes. To do that,we first scan the entire input and count the ** number of occurances of each character value in the input. Suppose ** the number of 0x00 characters is N(0),the number of occurances of 0x01 ** is N(1),and so forth up to the number of occurances of 0xff is N(255). ** An offset of 0 is not allowed so we don't have to test it. the number ** of escapes @R_502_4173@ for an offset of 1 is N(1)+N(2)+N(40). the number ** of escapes @R_502_4173@ for an offset of 2 is N(2)+N(3)+N(41). And so forth. ** In this way we find the offset that gives the minimum number of escapes,** and thus minimizes the length of the output String. */ /* ** Encode a binary buffer "in" of size n bytes so that it contains ** no instances of characters '\'' or '\000'. The output is ** null-terminated and can be used as a String value in an INSERT ** or updatE statement. Use sqlite3_decode_binary() to convert the ** String BACk into its original binary. ** ** The result is written into a preallocated output buffer "out". ** "out" must be able to hold at least 2 +(257*n)/254 bytes. ** In other words,the output will be expanded by as much as 3 ** bytes for every 254 bytes of input plus 2 bytes of fixed overhead. ** (This is approximately 2 + 1.0118*n or about a 1.2% size increase.) ** ** The return value is the number of characters in the encoded ** String,excluding the "\000" terminator. */ int sqlite3_encode_binary(const unsigned char *in,unsigned char *out){ int i,j,e,m; int cnt[256]; if( n<=0 ){ out[0] = 'x'; out[1] = 0; return 1; } memset(cnt,sizeof(cnt)); for(i=n-1; i>=0; i--){ cnt[in[i]]++; } m = n; for(i=1; i<256; i++){ int sum; if( i=='\'' ) conTinue; sum = cnt[i] + cnt[(i+1)&0xff] + cnt[(i+'\'')&0xff]; if( sum<m ){ m = sum; e = i; if( m==0 ) break; } } out[0] = e; j = 1; for(i=0; i<n; i++){ int c = (in[i] - E)&0xff; if( c==0 ){ out[j++] = 1; out[j++] = 1; }else if( c==1 ){ out[j++] = 1; out[j++] = 2; }else if( c=='\'' ){ out[j++] = 1; out[j++] = 3; }else{ out[j++] = c; } } out[j] = 0; return j; } /* ** Decode the String "in" into binary data and write it into "out". ** This routIne reverses the enCoding created by sqlite3_encode_binary(). ** The output will always be a few bytes less than the input. the number ** of bytes of output is returned. If the input is not a well-formed ** enCoding,-1 is returned. ** ** The "in" and "out" parameters may point to the same buffer in order ** to decode a String in place. */ int sqlite3_decode_binary(const unsigned char *in,c,e; e = *(in++); i = 0; while( (c = *(in++))!=0 ){ if( c==1 ){ c = *(in++); if( c==1 ){ c = 0; }else if( c==2 ){ c = 1; }else if( c==3 ){ c = '\''; }else{ return -1; } } out[i++] = (c + E)&0xff; } return i;
}
这里还有一个外国哥们写的一个sqlite C++类http://www.adp-gmbh.ch/sqlite/wrapper.html,具体哪个好,还没比较过,试试吧
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