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National Instruments Corporation

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LabWindows/CVI Programmer Reference Manual

Contents

About This Manual

Organization of This Manual ...........................................................................................xiii
Conventions Used in This Manual...................................................................................xiv

Related Documentation .....................................................................................xv
Customer Communication.................................................................................xvi

Chapter 1
LabWindows/CVI Compiler

Overview..........................................................................................................................1-1
LabWindows/CVI Compiler Specifics ............................................................................1-1

Compiler Limits.................................................................................................1-1
Compiler Options ..............................................................................................1-2
Compiler Defines...............................................................................................1-2

C Language Non-Conformance .......................................................................................1-2
C Language Extensions ...................................................................................................1-2

Keywords That Are Not ANSI C Standard .......................................................1-2
Calling Conventions (Windows 95/NT Only)...................................................1-2
Import and Export Qualifiers.............................................................................1-3
C++ Comment Markers.....................................................................................1-4
Duplicate Typedefs............................................................................................1-4
Structure Packing Pragma (Windows 3.1 and Windows 95/NT Only).............1-4
Program Entry Points (Windows 95/NT Only) .................................................1-5

C Library Issues ...............................................................................................................1-5

Using the Low-Level I/O Functions..................................................................1-5

C Data Types and 32-Bit Compiler Issues.......................................................................1-6

Data Types.........................................................................................................1-6
Converting 16-Bit Source Code to 32-Bit Source Code ...................................1-6

Debugging Levels ............................................................................................................1-8
User Protection ................................................................................................................1-8

Array Indexing and Pointer Protection Errors...................................................1-8

Pointer Arithmetic (Non-Fatal) ...........................................................1-8
Pointer Assignment (Non-Fatal) .........................................................1-9
Pointer Dereference Errors (Fatal) ......................................................1-9
Pointer Comparison (Non-Fatal).........................................................1-10
Pointer Subtraction (Non-Fatal)..........................................................1-10
Pointer Casting (Non-Fatal) ................................................................1-10

Dynamic Memory Protection Errors .................................................................1-11

Memory Deallocation (Non-Fatal)......................................................1-11
Memory Corruption (Fatal).................................................................1-11

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