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#ifndef __SQLITE_H
#define __SQLITE_H
#include <cassert>
#include <stdexcept>
#include <string>
#include <sqlite3.h>
namespace sqlite {
using std::string;
class exception : public std::runtime_error {
public:
int rcode;
explicit exception(const string& w,int rc=-1)
: std::runtime_error(w), rcode(rc) { }
~exception() throw() { }
};
class db_t {
public:
sqlite3 *_D;
db_t()
: _D(0) { }
db_t(const char *f)
: _D(0) { open(f); }
~db_t() { close(); }
operator const sqlite3*(void) const { return _D; }
operator sqlite3*(void) { return _D; }
void close() {
if(_D) {
sqlite3_close(_D);
_D = 0;
}
}
void open(const char *f) {
close();
int r = sqlite3_open(f,&_D);
if(r!=SQLITE_OK) {
string msg = sqlite3_errmsg(_D); sqlite3_close(_D);
throw exception("Failed to open SQLite database: "+msg,r);
}
}
void exec(const char *sql) {
assert(_D);
char *errm;
int r = sqlite3_exec(_D,sql,NULL,NULL,&errm);
if(r!=SQLITE_OK)
throw exception(string("Failed to sqlite3_exec():")+errm,r);
}
void get_table(const char *sql,char ***resp,int *nr,int *nc) {
assert(_D);
char *errm;
int r = sqlite3_get_table(_D,sql,resp,nr,nc,&errm);
if(r!=SQLITE_OK)
throw exception(string("Failed to sqlite3_get_table():")+errm,r);
}
};
template<typename T>
class mem_t {
public:
T _M;
mem_t(T M) :_M(M) { }
~mem_t() { if(_M) sqlite3_free(_M); }
operator const T&(void) const { return _M; }
operator T&(void) { return _M; }
mem_t operator=(T M) {
if(_M) sqlite3_free(_M);
_M = M;
}
};
class table_t {
public:
char **_T;
table_t() : _T(0) { }
table_t(char **T) : _T(T) { }
~table_t() { if(_T) sqlite3_free_table(_T); }
operator char**&(void) { return _T; }
operator char ***(void) {
if(_T) sqlite3_free_table(_T);
return &_T; }
const char *get(int r,int c,int nc) {
assert(_T);
return _T[r*nc+c];
}
};
}
#endif /* __SQLITE_H */
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