mirror of
https://github.com/VCMP-SqMod/SqMod.git
synced 2024-11-09 01:07:16 +01:00
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
// ------------------------------------------------------------------------------------------------
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#include "Handle/Statement.hpp"
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// ------------------------------------------------------------------------------------------------
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namespace SqMod {
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// ------------------------------------------------------------------------------------------------
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void StmtHnd::Validate() const
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{
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// Is the handle valid?
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if ((m_Hnd == nullptr) || (m_Hnd->mPtr == nullptr))
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{
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STHROWF("Invalid SQLite statement reference");
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}
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}
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// ------------------------------------------------------------------------------------------------
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StmtHnd::Handle::~Handle()
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{
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// Is there anything to finalize?
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if (!mPtr)
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{
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return; // Nothing to finalize
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}
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// Are we dealing with a memory leak? Technically shouldn't reach this situation!
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else if (mRef != 0)
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{
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// Should we deal with undefined behavior instead? How bad is one statement left alive?
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_SqMod->LogErr("SQLite statement is still referenced (%s)", mQuery.c_str());
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}
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else
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{
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// Attempt to finalize the statement
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if ((sqlite3_finalize(mPtr)) != SQLITE_OK)
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{
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_SqMod->LogErr("Unable to finalize SQLite statement [%s]", mConn.ErrMsg());
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}
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}
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}
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// ------------------------------------------------------------------------------------------------
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void StmtHnd::Handle::Create(CSStr query)
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{
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// Make sure a previous statement doesn't exist
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if (mPtr)
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{
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STHROWF("Unable to prepare statement. Statement already prepared");
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}
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// Is the specified database connection is valid?
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else if (!mConn)
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{
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STHROWF("Unable to prepare statement. Invalid connection handle");
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}
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// Save the query string and therefore multiple strlen(...) calls
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mQuery.assign(query ? query : _SC(""));
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// Is the specified query string we just saved, valid?
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if (mQuery.empty())
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{
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STHROWF("Unable to prepare statement. Invalid query string");
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}
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// Attempt to prepare a statement with the specified query string
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else if ((mStatus = sqlite3_prepare_v2(mConn, mQuery.c_str(), (Int32)mQuery.size(),
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&mPtr, nullptr)) != SQLITE_OK)
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{
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// Clear the query string since it failed
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mQuery.clear();
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// Explicitly make sure the handle is null
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mPtr = nullptr;
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// Now it's safe to throw the error
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STHROWF("Unable to prepare statement [%s]", mConn.ErrMsg());
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}
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else
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{
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// Obtain the number of available columns
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mColumns = sqlite3_column_count(mPtr);
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}
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}
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// ------------------------------------------------------------------------------------------------
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Int32 StmtHnd::Handle::GetColumnIndex(CSStr name)
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{
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// Validate the handle
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if (!mPtr)
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{
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STHROWF("Invalid SQLite statement");
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}
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// Are the names cached?
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else if (mIndexes.empty())
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{
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for (Int32 i = 0; i < mColumns; ++i)
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{
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// Get the column name at the current index
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CSStr name = (CSStr)sqlite3_column_name(mPtr, i);
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// Validate the name
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if (!name)
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{
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STHROWF("Unable to retrieve column name for index (%d)", i);
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}
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// Save it to guarantee the same lifetime as this instance
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else
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{
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mIndexes[name] = i;
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}
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}
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}
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// Attempt to find the specified column
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const Indexes::iterator itr = mIndexes.find(name);
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// Was there a column with the specified name?
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if (itr != mIndexes.end())
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{
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return itr->second;
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}
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// No such column exists (expecting the invoker to validate the result)
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return -1;
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}
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} // Namespace:: SqMod
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