YAP support for InputOutput¶

The main core features of the Prolog engine.

• File and Directory Operations

• YAP Old Style Socket and Pipe Interface

• Term Writing in Prolog.

• Time System Interface

• Operating System Interface

• Unix Signal Handling

• Read Term From A Stream

• Interface to the OS number rg.

• Access to Operating System Functionality

• Stream Operations

• Formatted Output

• Memory-Based Streams

• (DEC-10) Edinburgh Input/Output

• Support for console-based interaction.

• Character Encoding and Manipulation.

• Character-Based Input/Output

• Aliases: Giving Names to Streams

• File Name Resolution

Some of the Input/Output predicates described below will in certain conditions provide error messages and abort only if the file_errors flag is set.

If this flag is cleared the same predicates will just fail. Details on setting and clearing this flag are given under 7.7.