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%
% PSI Programmer's Manual
%
% Fundamental PSI Functions Intro.
%
% Daniel Crawford, 26 January, 1996
%
Each \PSIthree\ module (e.g. \PSIcscf) must perform two specific
tasks, regardless of the individual module's specific purpose(s): (1)
obtaining user input options and (2) writing to and reading from
binary files (e.g. the checkpoint file). \PSIthree\ programs written
in the C programming language make use of two libraries which
provide all the tools necessary to carry out these functions:
\begin{itemize}
\item \library{libipv1.a} --- the input parser
\item \library{libpsio.a} --- the I/O interface
\end{itemize}
In addition, the libraries \library{libciomr.a} and \library{libqt.a}
provide important functions for memory allocation, mathematics, and
code timing. In the next section, we will discuss the basic
components of a \PSIthree\ C-language program, followed by detailed
descriptions of the input parsing and I/O libraries.
\subsection{The Structure of a \PSIthree\ C Program}\label{C_Program}
\input{c_program}
\subsection{The Input Parser}\label{C_IP}
\input{ip}
\subsection{The Binary Input/Output System}\label{C_IO_New}
\input{io_new}
%\subsection{The Old Binary Input and Output System}\label{C_IO}
%\input{io}
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