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C or C++ code for an extension must include the header file
gawkapi.h, which declares the functions and defines the data
types used to communicate with gawk.
This (rather large) section describes the API in detail.
| • Extension API Functions Introduction: | Introduction to the API functions. | |
| • General Data Types: | The data types. | |
| • Memory Allocation Functions: | Functions for allocating memory. | |
| • Constructor Functions: | Functions for creating values. | |
| • Registration Functions: | Functions to register things with
gawk.
| |
| • Printing Messages: | Functions for printing messages. | |
• Updating ERRNO: | Functions for updating ERRNO.
| |
| • Requesting Values: | How to get a value. | |
| • Accessing Parameters: | Functions for accessing parameters. | |
| • Symbol Table Access: | Functions for accessing global variables. | |
| • Array Manipulation: | Functions for working with arrays. | |
| • Redirection API: | How to access and manipulate redirections. | |
| • Extension API Variables: | Variables provided by the API. | |
| • Extension API Boilerplate: | Boilerplate code for using the API. | |
| • Changes from API V1: | Changes from V1 of the API. |