Scientific Computing in the C^H Programming Language

Abstract

We have developed a general-purpose block-structured interpretive programming Ianguage. The syntax and semantics of this language called CHare similar to C. CHretains most features of C from the scientific computing point of view. In this paper, the extension of C to CHfor numerical computation of real numbers will be described. Metanumbers of −0.0, 0.0, Inf, −Inf, and NaN are introduced in CH. Through these metanumbers, the power of the IEEE 754 arithmetic standard is easily available to the programmer. These metanumbers are extended to commonly used mathematical functions in the spirit of the IEEE 754 standard and ANSI C. The definitions for manipulation of these metanumbers in I/O; arithmetic, relational, and logic operations; and built-in polymorphic mathematical functions are defined. The capabilities of bitwise, assignment, address and indirection, increment and decrement, as well as type conversion operations in ANSI C are extended in CH. In this paper, mainly new linguistic features of CHin comparison to C will be described. Example programs programmed in CHwith metanumbers and polymorphic mathematical functions will demonstrate capabilities of CHin scientific computing.

A model for computing the dual stiffness matrix of the human knee joint

“…The computation of the dual stiffness matrix, and its following handling, in these examples have been implemented using the Ch programming language, a programming language developed by Cheng, 16,18,19 making use of the linear dual algebra routines developed by Pennestrı`et al 13,20,21 …”

An embeddable mobile agent platform supporting runtime code mobility, interaction and coordination of mobile agents and host systems

“…An embeddable C/C++ interpreter, Ch [36][37][38], was chosen to be the Agent Execution Engine (AEE) to run C/C++ mobile agent codes. Using Ch as a runtime execution environment has several advantages over other alternatives.…”

“…Since most of the systems are written in C/C++, Mobile-C chose C/C++ as the mobile agent language for easy interfacing with control programs and underlying hardware. Additionally, Mobile-C adopted an embeddable C/ C++ interpreter, Ch [36][37][38], as the Agent Execution Engine (AEE) to support the interpretive execution of C/C++ mobile agent codes. As opposed to a standalone mobile agent platform, the Mobile-C library was developed thereafter to make Mobile-C embeddable in any C/C++ programs to support code mobility.…”

Communication and migration of an embeddable mobile agent platform supporting runtime code mobility

“…Most of the systems are written in C/C++; Mobile-C chose C/C++ as the mobile agent language because C has an advantage for easy interfacing with control programs and underlying hardware. Additionally, Mobile-C integrated an embeddable C/C++ interpreter, Ch [27][28][29], as the Agent Execution Engine (AEE) in order to run the mobile agent code. The migration of mobile agent in Mobile-C is achieved through FIPA agent communication language (ACL) messages.…”