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Improved efficiency and code reuse with templates and pure functions
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@KOLANICH
KOLANICH committed Dec 26, 2019
1 parent 741ffcd commit a6eb4f4
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Showing 2 changed files with 51 additions and 191 deletions.
241 changes: 50 additions & 191 deletions include/SQLiteCpp/Statement.h
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Original file line number Diff line number Diff line change
Expand Up @@ -227,110 +227,52 @@ class Statement
*/
void bind(const int aIndex);

/**
* @brief Bind an int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const int aValue)
{
bind(getIndex(apName), aValue);
}
/**
* @brief Bind a 32bits unsigned int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const unsigned aValue)
template<typename T>
inline void bind(const char* apName, const T &aValue)
{
bind(getIndex(apName), aValue);
}

#if (LONG_MAX == INT_MAX) // 4 bytes "long" type means the data model is ILP32 or LLP64 (Win64 Visual C++ and MinGW)
/**
* @brief Bind a 32bits long value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const long aValue)
template<typename T> inline void bindNoCopy(const char* apName, const T& aValue)
{
bind(apName, static_cast<int>(aValue));
}
#else // 8 bytes "long" type means the data model is LP64 (Most Unix-like, Windows when using Cygwin; z/OS)
/**
* @brief Bind a 64bits long value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const long aValue)
{
bind(apName, static_cast<long long>(aValue));
}
#endif
/**
* @brief Bind a 64bits int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const long long aValue)
{
bind(getIndex(apName), aValue);
}
/**
* @brief Bind a double (64bits float) value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const char* apName, const double aValue)
{
bind(getIndex(apName), aValue);
}
/**
* @brief Bind a string value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
void bind(const char* apName, const std::string& aValue)
{
bind(getIndex(apName), aValue);
bindNoCopy(getIndex(apName), aValue);
}
/**
* @brief Bind a text value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
void bind(const char* apName, const char* apValue)

#if __cplusplus >= 201103L
#define ENABLE_IF_CONST_CHAR_OR_VOID \
template<\
typename T\
, class = typename std::enable_if<\
std::is_same<T, const char>::value\
|| std::is_same<T, const void>::value\
>::type\
>


ENABLE_IF_CONST_CHAR_OR_VOID
void bind(const char* apName, T* apValue)
{
bind(getIndex(apName), apValue);
}
/**
* @brief Bind a binary blob value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
void bind(const char* apName, const void* apValue, const int aSize)
{
bind(getIndex(apName), apValue, aSize);
}
/**
* @brief Bind a string value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* The string can contain null characters as it is binded using its size.
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
void bindNoCopy(const char* apName, const std::string& aValue)
ENABLE_IF_CONST_CHAR_OR_VOID
void bindNoCopy(const char* apName, T* apValue)
{
bindNoCopy(getIndex(apName), aValue);
bindNoCopy(getIndex(apName), apValue);
}
/**
* @brief Bind a text value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* Main usage is with null-terminated literal text (aka in code static strings)
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
void bindNoCopy(const char* apName, const char* apValue)

ENABLE_IF_CONST_CHAR_OR_VOID
void bind(const char* apName, T* apValue, const int aSize)
{
bindNoCopy(getIndex(apName), apValue);
bind(getIndex(apName), apValue, aSize);
}
/**
* @brief Bind a binary blob value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
void bindNoCopy(const char* apName, const void* apValue, const int aSize)
ENABLE_IF_CONST_CHAR_OR_VOID
void bindNoCopy(const char* apName, T* apValue, const int aSize)
{
bindNoCopy(getIndex(apName), apValue, aSize);
}
#endif


/**
* @brief Bind a NULL value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
Expand All @@ -341,120 +283,37 @@ class Statement
bind(getIndex(apName));
}


/**
* @brief Bind an int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
inline void bind(const std::string& aName, const int aValue)
template<typename T>
void bind(const std::string& aName, T &v)
{
bind(aName.c_str(), aValue);
}
/**
* @brief Bind a 32bits unsigned int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
inline void bind(const std::string& aName, const unsigned aValue)
{
bind(aName.c_str(), aValue);
bind(aName.c_str(), v);
}

#if (LONG_MAX == INT_MAX) // 4 bytes "long" type means the data model is ILP32 or LLP64 (Win64 Visual C++ and MinGW)
/**
* @brief Bind a 32bits long value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const std::string& aName, const long aValue)
{
bind(aName.c_str(), static_cast<int>(aValue));
}
#else // 8 bytes "long" type means the data model is LP64 (Most Unix-like, Windows when using Cygwin; z/OS)
/**
* @brief Bind a 64bits long value to a parameter "?", "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
void bind(const std::string& aName, const long aValue)
{
bind(aName.c_str(), static_cast<long long>(aValue));
}
#endif
/**
* @brief Bind a 64bits int value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
inline void bind(const std::string& aName, const long long aValue)
{
bind(aName.c_str(), aValue);
}
/**
* @brief Bind a double (64bits float) value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*/
inline void bind(const std::string& aName, const double aValue)
{
bind(aName.c_str(), aValue);
}
/**
* @brief Bind a string value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
inline void bind(const std::string& aName, const std::string& aValue)
{
bind(aName.c_str(), aValue);
}
/**
* @brief Bind a text value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
inline void bind(const std::string& aName, const char* apValue)
{
bind(aName.c_str(), apValue);
}
/**
* @brief Bind a binary blob value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @note Uses the SQLITE_TRANSIENT flag, making a copy of the data, for SQLite internal use
*/
inline void bind(const std::string& aName, const void* apValue, const int aSize)
#if __cplusplus >= 201103L
ENABLE_IF_CONST_CHAR_OR_VOID
inline void bind(const std::string& aName, T* v)
{
bind(aName.c_str(), apValue, aSize);
bind(aName.c_str(), v);
}
/**
* @brief Bind a string value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* The string can contain null characters as it is binded using its size.
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
inline void bindNoCopy(const std::string& aName, const std::string& aValue)
{
bindNoCopy(aName.c_str(), aValue);
}
/**
* @brief Bind a text value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* Main usage is with null-terminated literal text (aka in code static strings)
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
inline void bindNoCopy(const std::string& aName, const char* apValue)

ENABLE_IF_CONST_CHAR_OR_VOID
inline void bind(const std::string& aName, T* v, const int aSize)
{
bindNoCopy(aName.c_str(), apValue);
bind(aName.c_str(), v, aSize);
}
/**
* @brief Bind a binary blob value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @warning Uses the SQLITE_STATIC flag, avoiding a copy of the data. The string must remains unchanged while executing the statement.
*/
inline void bindNoCopy(const std::string& aName, const void* apValue, const int aSize)

ENABLE_IF_CONST_CHAR_OR_VOID
inline void bindNoCopy(const std::string& aName, T* v)
{
bindNoCopy(aName.c_str(), apValue, aSize);
bindNoCopy(aName.c_str(), v);
}
/**
* @brief Bind a NULL value to a named parameter "?NNN", ":VVV", "@VVV" or "$VVV" in the SQL prepared statement (aIndex >= 1)
*
* @see clearBindings() to set all bound parameters to NULL.
*/
inline void bind(const std::string& aName) // bind NULL value

ENABLE_IF_CONST_CHAR_OR_VOID
inline void bindNoCopy(const std::string& aName, T* v, const int aSize)
{
bind(aName.c_str());
bindNoCopy(aName.c_str(), v, aSize);
}
#endif

////////////////////////////////////////////////////////////////////////////

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1 change: 1 addition & 0 deletions src/Statement.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,7 @@ void Statement::clearBindings()
check(ret);
}


int Statement::getIndex(const char * const apName)
{
return sqlite3_bind_parameter_index(mStmtPtr, apName);
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