XLIB Programming Manual, Rel. 5, Third Edition

Appendix D. The basecalc Application

This appendix lists the complete source code for the basecalc application described in Chapter 12. Source code for all examples in this book is available as described in the Preface.

The X Programmer’s Calculator (basecalc) was described in Chapter 14.

This appendix presents the complete code for basecalc, including the following files and routines that were not shown in Chapter 14.

basecalc.h

Include file for this application.

convButton

Changes the current base and converts a value, if any.

digitButton

Gets a digit and assigns it to the variable Value.

displayVal

Calculates appropriate format string for base.

initTty

Performs system calls to get user’s current erase, delete, and interrupt characters.

keyToWin

Translates a keycode as if a pad had been selected.

makePixmap

Makes a pixmap from bitmap data, shown and described in Chapter 6.

operButton

An operation, either does it or waits for next value and =.

printInBase

Composes the string that should be displayed. Called from Sprintf.

specButton

Clears a digit, an entry, or all, or toggles unsigned mode.

Sprintf

A modified version of the standard C utility sprintf, which does not print in binary. Sprintf calls printInBase.

winPressed

Determines whether pad pressed was a digit, an operator, a conversion, or a special pad.

Example D-1 shows the basecalc.h include file. This include file sets up the structures and global variables used in the calculator application.

Example D-1. The complete basecalc.h file

/* Window flags ...