node-sqlanywhere/src/sacapidll.cpp at master · JFLeblay/node-sqlanywhere · GitHub

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// ***************************************************************************

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

// While not a requirement of the license, if you do modify this file, we

// would appreciate hearing about it. Please email

// sqlany_interfaces@sap.com

// ***************************************************************************

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

#if defined( _WIN32 )

#include <windows.h>

#define DEFAULT_LIBRARY_NAME "dbcapi.dll"

#else

#include <dlfcn.h>

/* assume we are running on a UNIX platform */

#if defined( __APPLE__ )

#define LIB_EXT "dylib"

#else

#define LIB_EXT "so"

#endif

#if defined( _REENTRANT ) || defined( _THREAD_SAFE ) \

|| defined( __USE_REENTRANT )

/* if building a thread-safe library, we need to load

the thread-safe dbcapi library */

#define DEFAULT_LIBRARY_NAME "libdbcapi_r." LIB_EXT

#else

#define DEFAULT_LIBRARY_NAME "libdbcapi." LIB_EXT

#endif

#include "sacapidll.h"

static

void * loadLibrary( const char * name )

/*************************************/

{

void * handle;

#if defined( _WIN32 )

handle = LoadLibrary( name );

#else

handle = dlopen( name, RTLD_LAZY );

#endif

return handle;

}

static

void unloadLibrary( void * handle )

/**********************************/

{

#if defined( _WIN32 )

FreeLibrary( (HMODULE)handle );

#else

dlclose( handle );

#endif

}

static

void * findSymbol( void * dll_handle, const char * name )

/*******************************************************/

{

#if defined( _WIN32 )

return GetProcAddress( (HMODULE)dll_handle, name );

#else

return dlsym( dll_handle, name );

#endif

}

#define LookupSymbol( api, sym ) \

api->sym = (sym ## _func)findSymbol( api->dll_handle, #sym );

#define LookupSymbolAndCheck( api, sym ) \

api->sym = (sym ## _func)findSymbol( api->dll_handle, #sym ); \

if( api->sym == NULL ) { \

unloadLibrary( api->dll_handle ); \

return 0; \

}

int sqlany_initialize_interface( SQLAnywhereInterface * api, const char * path )

/*******************************************************************************/

{

char * env;

memset( api, 0, sizeof(*api));

if( path != NULL ) {

api->dll_handle = loadLibrary( path );

if( api->dll_handle != NULL ) {

goto loaded;

}

env = getenv( "SQLANY_API_DLL" );

if( env != NULL ) {

api->dll_handle = loadLibrary( env );

if( api->dll_handle != NULL ) {

goto loaded;

}

api->dll_handle = loadLibrary( DEFAULT_LIBRARY_NAME );

if( api->dll_handle != NULL ) {

goto loaded;

}

return 0;

loaded:

LookupSymbolAndCheck( api, sqlany_init );

LookupSymbolAndCheck( api, sqlany_fini );

LookupSymbolAndCheck( api, sqlany_new_connection );

LookupSymbolAndCheck( api, sqlany_free_connection );

LookupSymbolAndCheck( api, sqlany_make_connection );

LookupSymbolAndCheck( api, sqlany_connect );

LookupSymbolAndCheck( api, sqlany_disconnect );

LookupSymbolAndCheck( api, sqlany_execute_immediate );

LookupSymbolAndCheck( api, sqlany_prepare );

LookupSymbolAndCheck( api, sqlany_free_stmt );

LookupSymbolAndCheck( api, sqlany_num_params );

LookupSymbolAndCheck( api, sqlany_describe_bind_param );

LookupSymbolAndCheck( api, sqlany_bind_param );

LookupSymbolAndCheck( api, sqlany_send_param_data );

LookupSymbolAndCheck( api, sqlany_reset );

LookupSymbolAndCheck( api, sqlany_get_bind_param_info );

LookupSymbolAndCheck( api, sqlany_execute );

LookupSymbolAndCheck( api, sqlany_execute_direct );

LookupSymbolAndCheck( api, sqlany_fetch_absolute );

LookupSymbolAndCheck( api, sqlany_fetch_next );

LookupSymbolAndCheck( api, sqlany_get_next_result );

LookupSymbolAndCheck( api, sqlany_affected_rows );

LookupSymbolAndCheck( api, sqlany_num_cols );

LookupSymbolAndCheck( api, sqlany_num_rows );

LookupSymbolAndCheck( api, sqlany_get_column );

LookupSymbolAndCheck( api, sqlany_get_data );

LookupSymbolAndCheck( api, sqlany_get_data_info );

LookupSymbolAndCheck( api, sqlany_get_column_info );

LookupSymbolAndCheck( api, sqlany_commit );

LookupSymbolAndCheck( api, sqlany_rollback );

LookupSymbolAndCheck( api, sqlany_client_version );

LookupSymbolAndCheck( api, sqlany_error );

LookupSymbolAndCheck( api, sqlany_sqlstate );

LookupSymbolAndCheck( api, sqlany_clear_error );

#if _SACAPI_VERSION+0 >= SQLANY_API_VERSION_2

/* We don't report an error if we don't find the v2 entry points.

That allows the calling app to revert to v1 */

LookupSymbol( api, sqlany_init_ex );

LookupSymbol( api, sqlany_fini_ex );

LookupSymbol( api, sqlany_new_connection_ex );

LookupSymbol( api, sqlany_make_connection_ex );

LookupSymbol( api, sqlany_client_version_ex );

LookupSymbolAndCheck( api, sqlany_cancel );

#endif

#if _SACAPI_VERSION+0 >= SQLANY_API_VERSION_3

/* We don't report an error if we don't find the v3 entry points.

That allows the calling app to revert to v1 */

LookupSymbol( api, sqlany_register_callback );

#endif

#if _SACAPI_VERSION+0 >= SQLANY_API_VERSION_4

/* We don't report an error if we don't find the v4 entry points.

That allows the calling app to revert to v1 */

LookupSymbol( api, sqlany_set_batch_size );

LookupSymbol( api, sqlany_set_param_bind_type );

LookupSymbol( api, sqlany_get_batch_size );

LookupSymbol( api, sqlany_set_rowset_size );

LookupSymbol( api, sqlany_get_rowset_size );

LookupSymbol( api, sqlany_set_column_bind_type );

LookupSymbol( api, sqlany_bind_column );

LookupSymbol( api, sqlany_clear_column_bindings );

LookupSymbol( api, sqlany_fetched_rows );

LookupSymbol( api, sqlany_set_rowset_pos );

#endif

#if _SACAPI_VERSION+0 >= SQLANY_API_VERSION_5

LookupSymbol( api, sqlany_reset_param_data );

LookupSymbol( api, sqlany_error_length );

#endif

api->initialized = 1;

return 1;

}

#undef LookupSymbolAndCheck

void sqlany_finalize_interface( SQLAnywhereInterface * api )

/***********************************************************/

{

if( !api->initialized ) {

return;

}

unloadLibrary( api->dll_handle );

memset( api, 0, sizeof(*api));

}

node-sqlanywhere/src/sacapidll.cpp at master · JFLeblay/node-sqlanywhere · GitHub

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