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https://github.com/vrogier/ocilib

OCILIB (C and C++ Drivers for Oracle) - Open source C and C++ library for accessing Oracle databases
https://github.com/vrogier/ocilib

api driver oci ocilib oracle oracle-database sql

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OCILIB (C and C++ Drivers for Oracle) - Open source C and C++ library for accessing Oracle databases

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README 

        
 /*

 * OCILIB - C Driver for Oracle (C Wrapper for Oracle OCI)

 *

 * Website: http://www.ocilib.net

 *

 * Copyright (c) 2007-2023 Vincent ROGIER 

 *

 */

 

===========================================================================

DESCRIPTION 

===========================================================================



OCILIB is an open source and portable Oracle Driver that delivers really fast and reliable access to Oracle databases.



The OCILIB library:



    * offers a rich, full featured and easy to use API

    * runs on all Oracle platforms

    * is written in pure ISO C code with native ISO C Unicode support

    * encapsulates OCI (Oracle Call Interface)

    * is the most complete available OCI wrapper

 

===========================================================================

VERSION 

===========================================================================



see VERSION file.



===========================================================================

FEATURES 

===========================================================================

   

    * Full ANSI and Unicode support on all platforms (ISO C wide strings or UTF8 strings)

    * Full 32/64 bits compatibility

    * Compatible with all Oracle version >= 8.0

    * Automatic adaptation to the runtime Oracle client version

    * Runtime loading of Oracle libraries

    * Built-in error handling (global and thread context)

    * Full support for SQL API and Object API

    * Full support for ALL Oracle SQL and PL/SQL datatypes (scalars, objects, refs, collections, ..)

    * Full support for PL/SQL (blocks, cursors, Index by Tables and Nested tables)

    * Support for non scalar datatype with trough library objects 

    * Oracle Pooling (connections and sessions pools)

    * Oracle XA connectivity (X/Open Distributed Transaction Processing XA interface)

    * Oracle AQ (Advanced Queues)

    * Oracle TAF (Transparent Application Failover) and HA (High availabality) support 

    * Binding array Interface

    * Returning DML feature

    * Scrollable statements

    * Statement cache

    * Direct Path loading

    * Remote Instances Startup/Shutdown

    * Oracle Database Change notification / Continuous Query Notification

    * Oracle warnings support

    * Global and local transactions 

    * Describe database schema objects

    * Hash tables API

    * Portable Threads and mutexes API



===========================================================================

DOWNLOAD 

===========================================================================



Available at:



URL : http://www.ocilib.net



===========================================================================

LICENSE

===========================================================================



The source code is free source code licensed under the Apache License, Version 2.0.



(see the file LICENSE)



===========================================================================

COMPATIBILITY

===========================================================================



This current source is pure ISO C and should compile with any C90 Compliant compiler

for ANSI version and C99 for Unicode versions.

 

 Validated Platforms (32/64bits): 

 

 - Windows 

 - UP/UX 

 - Linux 

 - Solaris 

 - AIX

 - Mac OS X

 - OpenvMS (full validation pending)



 Validated Compilers : 



 - GCC / MinGW

 - MS Compilers 

 - XLC  

 - CCs 

 - LabView



 Validated Oracle versions : 

 

 - Oracle 8 

 - Oracle 9

 - Oracle 10

 - Oracle 11

 - Oracle 12

 - Oracle 18

 - Oracle 19

 - Oracle 21

  

===========================================================================

INSTALLATION AND LIBRARY BUILDS ON MS WINDOWS

===========================================================================



Precompiled OCILIB dynamic libraries are provided for Microsoft Windows :



     - ocilib\lib32 : 32bits binaires

     - ocilib\lib64 : 64bits binaires



Precompiled OCILIB static libraries are provided for Microsoft Windows :



     - ocilib\lib32 : 32bits binaries



2 methods :



1/

     - add the ocilib\include  directory to your include's path

     - add the ocilib\lib32|64 directory to your libraries path

     - add the ocilib\lib32|64 directory to your windows path



2/

     - copy  ocilib\include\ocilib.h to any place located in your include's path

     - copy  ocilib\lib32|64\ocilib[x].lib to any place located in your libraries path

     - copy  ocilib\lib32|64\ocilib[x].dll to any place located in your windows path

     - copy  ocilib\lib32\libocilib[x].a to any place located in your windows path



* BUILDING OCILIB FROM SOURCES *



OCILIB supports 3 builds options on Windows platforms :



1/ oracle import (linkage or runtime loading)



On win32, the provided build were compiled using is runtime loading.

If you want to import Oracle OCI at linkage time , you need to rebuild the libraries



Defines :



     - OCI_IMPORT_LINKAGE for linkage at compile time

     - OCI_IMPORT_RUNTIME for runtime loading



if no import mode is set, the library sets the default to OCI_IMPORT_LINKAGE



2/ charset (ansi, wide, mixed)



this pakcage provides 2 OCILIB Dlls (32bits and 64bits) :



      - ociliba.dll (ANSI / UTF8 version)

      - ocilibw.dll (UNICODE/UFT16/USC2/wchar_t version) 



this package provides 3 OCILIB static libs (32 bits only) :



      - libociliba.a (ANSI / UTF8 version)

      - libocilibw.a (UNICODE/UFT16/USC2/wchar_t version)  



Defines :



     - OCI_CHARSET_ANSI for ansi / UTF8

     - OCI_CHARSET_WIDE for unicode (wide strings)



if no charset mode is set, the library sets the default to OCI_CHARSET_ANSI 



3/ calling convention



On win32, the default calling convention is __stdcall.

So the OCILIB function using a variable number or parameters (OCI_xxxxFmt) won't work

If you need them, modify the preprocessor options to change OCI_API to __cdecl and rebuild !



Defines :



     - OCI_API =  __stdcall to link OCILIB to any language independent module

     - OCI_API = __cdecl (or no value) for C/C++ only !



if no charset mode is set, the library sets the default to no value



To rebuild the dynamic libraries (MS Visual Studio) :



      - open the dll project ocilib\proj\dll\ocilib_dll_vs200x.sln

      - do a batch build



To rebuild the static libraries (Code::blocks) :



      - open the static project ocilib\proj\mingw\ocilib_static_lib_mingw.cbp

      - do a batch build



* BUILDING THE DEMO *



1/ run an already built demo



     - run ocilib_demo.exe located in ocilib\proj\test\Win32|64\release [build]



2/ build a demo 



     - open the test project ocilib\proj\test\ocilib_demo_vs200x.sln or ocilib_demo_codeblocks.cbp

     - choose an configuration

     - build



* MAKE ANY PROGRAM WITH OCILIB *



1/ use the prebuilt Dlls



     - add ocilib/include folder to your compiler includes path

     - add ocilib/lib folder to your linker library path

     - For MinGW only, rename/copy ocilib[x].lib to libocilib[x].a

     - add ocilib[x].lib (or -locilib[x] from MinGw) to your linking options

     - add OCI_CHARSET_XXX macro to your preprocessor options

     - add OCI_API macro definition to your preprocessor options (set it to __stdcall)



2/ use the prebuilt Dlls



     - add ocilib/include folder to your compiler includes path

     - add ocilib/lib folder to your linker library path

     - add libocilib[x].a to your linking options

     - add OCI_CHARSET_XXX macro to your preprocessor options

     - add OCI_API macro definition to your preprocessor options (set it to __stdcall)



3/ link source code



     - add the source files located in ocilib/src to your project and defines the 3 build options

 

 

===========================================================================

INSTALLATION AND LIBRARY BUILDS ON LINUX AND UNIX BASED SYSTEMS

===========================================================================



OCILIB is available on MS Windows and Linux /Unix systems.



* BUILDING OCILIB FROM SOURCES *



Installation on Linux / Unix systems



see INSTALL file for installation options.



To install, use GNU install :



>./configure

>./make

>./make install



you migth need to `su` to make install



Make sure Oracle library path and the ocilib library path are defined in

your shared library variable (LB_LIBRARY_PATH, LDPATH, SHLIB_PATH....)



Custom install options



`--with-oracle-charset'



     Specify charset uses with Oracle OCI libraries

     Possible values are : ansi|wide

     Default is : ansi



`--with-oracle-import'



     Specify how OCILIB is importing Oracle OCI libraries

     Possible values are : linkage|runtime

     Default is : linkage

     in runtime import mode, Oracle libraries and environment are 

     not checked during compilation time.



`--with-oracle-home'



     Specify your Oracle home location.  (for regular Oracle client installation)

     Default is $ORACLE_HOME

     Only used if import mode is linkage



`--with-oracle-headers-path'



     Specify your OCI public headers path (for Oracle Instant client)

     Only used if import mode is linkage



`--with-oracle-lib-path'



     Specify your OCI shared library path (for Oracle Instant client)

     this directory must contains the libclntsh library.

     You might need to create a symbolic link without version number.

     Only used if import mode is linkage



`--with-custom-loader'



     Specify the linker the flag for adding support for loaders other than ld

     Default value is '-ldl'.

     Only used if import mode is runtime



* BUILDING THE DEMO *



copy demo.c and Makefile_demo from the folder $(OCILIB_PREFIX)/share/doc/ocilib/demo



(OCILIB_PREFIX is the installation lib folder - default is /usr/local)



to any of our full access directory and then compile :



>make -f Makefile_demo



* MAKE ANY PROGRAM WITH OCILIB *



Add the following to your makefile



1/ define charset



add -DOCI_CHARSET_xxxx  to your CFLAGS



where xxxx can be : ANSI | WIDE



2 / link OCILIB library



add -L$(OCILIB_PREFIX)/lib -locilib to your LDFLAGS



where OCILIB_PREFIX is the installation lib folder - default is /usr/local



2 / link Oracle library (if import mode = linkage which is default)



add -L$(ORACLE_HOME)/lib -lclntsh to your LDFLAGS



===========================================================================

FEED BACK, BUG REPORTS

===========================================================================



URL : http://www.ocilib.net/support



===========================================================================

DOCUMENTATION

===========================================================================



Included in the library archive, it's installed in $(OCILIB_PREFIX)/share/doc/ocilib/html/



Online : http://www.ocilib.net/documentation/html



===========================================================================

USE OF OCILIB

===========================================================================



Please, Let me know about projects using OCILIB.



Send me a mail at  with a brief description of your project



Thanks.