SQLite3封装类

概述源代码链接： http://www.adp-gmbh.ch/sqlite/wrapper.html 国内博客：http://www.cnblogs.com/ballwql/archive/2011/03/28/1997494.html /* SQLiteWrapper.h Copyright (C) 2004 René Nyffenegger This source cod

源代码链接： http://www.adp-gmbh.ch/sqlite/wrapper.HTML

国内博客：http://www.cnblogs.com/ballwql/archive/2011/03/28/1997494.HTML

/*    sqliteWrapper.h   copyright (C) 2004 René Nyffenegger   This source code is provIDed 'as-is',without any express or implIEd   warranty. In no event will the author be held liable for any damages   arising from the use of this software.   Permission is granted to anyone to use this software for any purpose,including commercial applications,and to alter it and redistribute it   freely,subject to the following restrictions:   1. The origin of this source code must not be misrepresented; you must not      claim that you wrote the original source code. If you use this source code      in a product,an ackNowledgment in the product documentation would be      appreciated but is not required.   2. Altered source versions must be plainly marked as such,and must not be      misrepresented as being the original source code.   3. This notice may not be removed or altered from any source distribution.   René Nyffenegger rene.nyffenegger@adp-gmbh.ch*/#ifndef sqlITE_WRAPPER_H__#define sqlITE_WRAPPER_H__#include <string>#include <vector>#include "sqlite3.h"class sqliteStatement {  private:    // sqliteStatement's ctor only to be called by sqliteWrapper    frIEnd class sqliteWrapper;    sqliteStatement(std::string const& statement,sqlite3* db);  public:    sqliteStatement();    enum dataType {      INT = sqlITE_INTEGER,FLT = sqlITE_float,TXT = sqlITE_TEXT,BLB = sqlITE_BLOB,Nul = sqlITE_NulL,};    dataType DataType(int pos_zero_indexed);    int         ValueInt   (int pos_zero_indexed);    std::string ValueString(int pos_zero_indexed);//    sqliteStatement(const sqliteStatement&);   ~sqliteStatement();    //sqliteStatement& operator=(sqliteStatement const&);    bool Bind    (int pos_zero_indexed,std::string const& value);    bool Bind    (int pos_zero_indexed,double             value);    bool Bind    (int pos_zero_indexed,int                value);    bool BindNull(int pos_zero_indexed);    bool Execute();    bool NextRow();    /*   Call reset if not depending on the NextRow cleaning up.         For example for select count(*) statements*/    bool reset();    bool RestartSelect();  private:    //voID DecreaseRefCounter();    //int* ref_counter_; // not yet used...    sqlite3_stmt* stmt_;};class sqliteWrapper {  public:    sqliteWrapper();    bool Open(std::string const& db_file);    class ResultRecord {      public:        std::vector<std::string> fIElds_;    };    class Resulttable {      frIEnd class sqliteWrapper;      public:        Resulttable() : ptr_cur_record_(0) {}            std::vector<ResultRecord> records_;             ResultRecord* next() {          if (ptr_cur_record_ < records_.size()) {            return &(records_[ptr_cur_record_++]);          }          return 0;        }          private:         voID reset() {           records_.clear();           ptr_cur_record_=0;         }          private:        unsigned int ptr_cur_record_;    };    bool SelectStmt           (std::string const& stmt,Resulttable& res);    bool DirectStatement      (std::string const& stmt);    sqliteStatement* Statement(std::string const& stmt);    std::string LastError();    // Transaction related    bool Begin   ();    bool Commit  ();    bool Rollback();  private:    static int SelectCallback(voID *p_data,int num_fIElds,char **p_fIElds,char **p_col_names);    sqlite3* db_;};#endif

/*    sqliteWrapper.cpp   copyright (C) 2004 René Nyffenegger   This source code is provIDed 'as-is',and must not be      misrepresented as being the original source code.   3. This notice may not be removed or altered from any source distribution.   René Nyffenegger rene.nyffenegger@adp-gmbh.ch*/#include "sqliteWrapper.h"// Todo: raus#include <windows.h>sqliteWrapper::sqliteWrapper() : db_(0) {}bool sqliteWrapper::Open(std::string const& db_file) {  if (sqlite3_open(db_file.c_str(),&db_) != sqlITE_OK) {    return false;  }  return true;} bool sqliteWrapper::SelectStmt(std::string const& stmt,Resulttable& res) {  char *errmsg;  int   ret;  res.reset();  ret = sqlite3_exec(db_,stmt.c_str(),SelectCallback,static_cast<voID*> (&res),&errmsg);  if (ret != sqlITE_OK) {    return false;  }  return true;//  if (ret != sqlITE_OK) {//    std::cout << stmt << " [" << errmsg << "]" << std::endl;//  }}// Todo parameter p_col_namesint sqliteWrapper::SelectCallback(voID *p_data,char** p_col_names) {  Resulttable* res = reinterpret_cast<Resulttable*>(p_data);  ResultRecord record;#ifdef sqlITE_WRAPPER_REPORT_ColUMN_nameS  // Hubert Castelain: column names in the first row of res if res is empty  if(res->records_.size()==0) {    ResultRecord col_names;    for(int i=0; i < num_fIElds; i++) {      if(p_fIElds[i]) col_names.fIElds_.push_back (p_col_names[i]);      else        col_names.fIElds_.push_back("(null)"); // or what else ?    }    res->records_.push_back(col_names);  }#endif  for(int i=0; i < num_fIElds; i++) {    // Hubert Castelain: special treatment if null    if (p_fIElds[i]) record.fIElds_.push_back(p_fIElds[i]);    else             record.fIElds_.push_back("<null>");  }  res->records_.push_back(record);  return 0;}sqliteStatement* sqliteWrapper::Statement(std::string const& statement) {  sqliteStatement* stmt;  try {    stmt = new sqliteStatement(statement,db_);    return stmt;  }  catch (const char* e) {    return 0;  }}sqliteStatement::sqliteStatement(std::string const& statement,sqlite3* db) {  if ( sqlite3_prepare(         db,statement.c_str(),// stmt        -1,// If than zero,then stmt is read up to the first nul terminator        &stmt_,0                   // Pointer to unused portion of stmt       )       != sqlITE_OK) {    throw sqlite3_errmsg(db);  }  if (!stmt_) {    throw "stmt_ is 0";  }}sqliteStatement::~sqliteStatement() {  // Hubert Castelain 28/8/2005  // Prevent the database remaining locked after some statement.  // Syntax: int sqlite3_finalize(sqlite3_stmt *pStmt);  if(stmt_) sqlite3_finalize(stmt_);}sqliteStatement::sqliteStatement() :  stmt_       (0){}bool sqliteStatement::Bind(int pos_zero_indexed,std::string const& value) {  if (sqlite3_bind_text (         stmt_,pos_zero_indexed+1,// Index of wildcard         value.c_str(),value.length(),// length of text         sqlITE_TRANSIENT     // sqlITE_TRANSIENT: sqlite makes its own copy         )       != sqlITE_OK) {     return false;  }  return true;}bool sqliteStatement::Bind(int pos_zero_indexed,double value) {  if (sqlite3_bind_double(          stmt_,// Index of wildcard          value          )        != sqlITE_OK) {      return false;  }  return true;}bool sqliteStatement::Bind(int pos_zero_indexed,int value) {  if (sqlite3_bind_int(          stmt_,// Index of wildcard           value           )        != sqlITE_OK) {      return false;  }  return true;}bool sqliteStatement::BindNull(int pos_zero_indexed) {  if (sqlite3_bind_null(          stmt_,pos_zero_indexed+1  // Index of wildcard          )        != sqlITE_OK) {      return false;  }  return true;}bool sqliteStatement::Execute() {  int rc = sqlite3_step(stmt_);  if (rc == sqlITE_BUSY) {    ::MessageBox(0,"sqlITE_BUSY",0);     return false;  }  if (rc == sqlITE_ERROR) {    ::MessageBox(0,"sqlITE_ERROR",0);     return false;  }  if (rc == sqlITE_MISUSE) {    ::MessageBox(0,0);     return false;  }  if (rc != sqlITE_DONE) {    //sqlite3_reset(stmt_);    return false;  }  sqlite3_reset(stmt_);  return true;}sqliteStatement::dataType sqliteStatement::DataType(int pos_zero_indexed) {  return dataType(sqlite3_column_type(stmt_,pos_zero_indexed));}int sqliteStatement::ValueInt(int pos_zero_indexed) {  return sqlite3_column_int(stmt_,pos_zero_indexed);}std::string sqliteStatement::ValueString(int pos_zero_indexed) {  return std::string(reinterpret_cast<const char*>(sqlite3_column_text(stmt_,pos_zero_indexed)));}bool sqliteStatement::RestartSelect() {  sqlite3_reset(stmt_);  return true;}bool sqliteStatement::reset() {  int rc = sqlite3_step(stmt_);  sqlite3_reset(stmt_);  if (rc == sqlITE_ROW) return true;  return false;}bool sqliteStatement::NextRow() {  int rc = sqlite3_step(stmt_);  if (rc == sqlITE_ROW   ) {    return true;  }  if (rc == sqlITE_DONE  ) {    sqlite3_reset(stmt_);    return false;  }   else if (rc == sqlITE_MISUSE) {    ::MessageBox(0,"sqliteStatement::NextRow sqlITE_MISUSE",0);  }   else if (rc == sqlITE_BUSY  ) {    ::MessageBox(0,"sqliteStatement::NextRow sqlITE_BUSY",0);  }   else if (rc == sqlITE_ERROR ) {    ::MessageBox(0,"sqliteStatement::NextRow sqlITE_ERROR",0);  }  return false;}bool sqliteWrapper::DirectStatement(std::string const& stmt) {  char *errmsg;  int   ret;  ret = sqlite3_exec(db_,&errmsg);  if(ret != sqlITE_OK) {    return false;  }  return true;  //if(ret != sqlITE_OK) {  //  std::cout << stmt << " [" << errmsg << "]" << std::endl;  //}}std::string sqliteWrapper::LastError() {  return sqlite3_errmsg(db_);}bool sqliteWrapper::Begin() {  return DirectStatement("begin");}bool sqliteWrapper::Commit() {  return DirectStatement("commit");}bool sqliteWrapper::Rollback() {  return DirectStatement("rollback");}

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