C

2025-06-10T00:29:28Z

Matthewmcnabb: Fix/remove broken "see also" links

'''C''' is a programming langage developed by Dennis Ritchie at Bell Labs in early 70s for software running on Unix. VSI C is a standard conforming implementation of the C programming language with VSI extensions. The VSI C
compiler runs under the OpenVMS Alpha and I64 Operating Systems and generates optimized and position-independent code.

VSI C is a native-mode language product, and is integrated into the Common Language Environments. All OpenVMS system services are available to programs written in VSI C. VSI C programs can invoke, as functions, modules written
in other languages.

= VSI C Features=
VSI C features include:
* support for RMS sequential files and associated access methods in addition to stream file-access methods
* standard-conformance checking, optional code-quality and portability diagnostics, linter features of [[SCA|VSI Source Code Analyzer]]
* complete debug and traceback records for use with [[OpenVMS Debugger]]
* IEEE 754 floating-point support
* support for installing several C versions on the same node
* separate modes of compulation to support each of the six C dialects (strict ANSI89, strict C99, relaxed ASI, common, Microsoft compatibility mode)\
* data types for numeric, nonnumeric, and systems programming etc. (for more features, see [https://vmssoftware.com/docs/VSI_OpenVMS_layered_products/VSI_C_spd.pdf VSI C for OpenVMS Software Product Description])

==Licensing==
A software license is required in order to use the VSI C software product.
* For Integrity servers, the license is a Concurrent Use license. Version update licenses are not available for the Integrity servers platform. Rights to use future revisions of VSI C are available only through a Support
Agreement or through a new license purchase.
* For AlphaServer systems, the license to use VSI C is included in the ALPHA-LP license.

=See also=
* [https://docs.vmssoftware.com/docs/vsi-c-user-s-guide-for-openvms-systems.pdf VSI C User's Guide for OpenVMS Systems]
* [https://docs.vmssoftware.com/vsi-c-language-reference-manual/ VSI C Language Reference Manual]
* [https://docs.vmssoftware.com/vsi-c-run-time-library-reference-manual-for-openvms-systems/ VSI C Runtime Library Reference Manual]
* [http://www.eight-cubed.com/examples.shtml C programming examples on Eight-cubed.com]
* [http://www3.sympatico.ca/n.rieck/demo_vms_html/openvms_demo_index.html C programming examples by Neil Rieck]

[[Category:VSI Products]]
[[Category:VMS Compilers]]

VMS IDE Quick Start

2025-05-20T00:12:41Z

Matthewmcnabb: Add to VMS IDE wiki category

These are quick instructions for using VMS IDE for those already familiar with Visual Studio Code. It is assumed that you have VSCode installed.

The way VMS IDE works is it connects a directory on Linux/Windows/wherever VSCode is installed to a directory on VMS and synchronizes your files between these directories, so you can edit in VSCode and then build/run on VMS. So, before you start, you need a working SSH connection to a VMS system (username/password or keyfile) with a directory on it where you will be working.

==Setting Up VMS IDE==

1. Download the VMS IDE extension.

2. Download and unzip this [https://products.vmssoftware.com/hubfs/VMS%20-%20Product%20Announcements/vms-ide-template-workspace.zip workspace template].

3. Click File -> Open Workspace from File and choose ide-test.code-workspace from the workspace template directory.

4. Inside of VMS IDE, open ide-test.code-workspace and fill in your hostname or IP, username, and password or keyfile for the OpenVMS system.

5. Inside of VMS IDE, open .vscode/settings.json and fill in the vmssoftware.synchronizer.project.root with the path to your directory on VMS relative to the login directory of the user (for example, if you're JDOE and the directory is [JDOE.IDETEST], write "idetest"; if it's [JDOE.DEV.IDETEST], write "dev/idetest").

6. Put your project files that you will be working on in your new workspace directory. To start working on them, perform a full zip upload; press Ctrl+P and choose VMS-IDE: Upload files via Zip. If everything went well, check out your files on VMS, otherwise examine the log.

==Using VMS IDE==

To open the command menu in VSCode, press Ctrl+P. There are three commands you can use to upload VSCode files to VMS:

* VMS-IDE: Upload Files via Zip (zips up files on the VSCode machine, SFTP's the zip archive to VMS and unzips there; good for starting/starting over).
* VMS-IDE: Upload Files (compares files on both systems and SFTP's the missing/modified files to VMS).
* VMS-IDE: Quick Upload (SFTP's to VMS the files changed/created since last upload).

We suggest you define a keyboard shortcut for quick upload:

1. Press Ctrl+K then Ctrl+S to open the VSCode Keyboard Shortcuts editor.

2. Using the search bar, find VMS IDE comands.

3. Double click the keybinding column next to the command in question, then follow the instructions in the popup to set the shortcut.

When starting to work on a VMS project with VMS IDE, always use 'Upload via Zip' first. Verify that the files are uploaded to VMS. Then, when you change the files, use 'Quick upload' or 'Upload files' to synchronize your changes with VMS.

You can also build your project on VMS with VMS IDE with MMS or DCL scripts. Check out [[Build_Configurations]] to see how it's done.

You can use the VMS Debugger inside of VMS IDE. See [[VMS_IDE_Debugger]] for instructions.

[[Category:VMS IDE]]

VSI OpenVMS Wiki - User contributions [en]

C

VMS IDE Quick Start