Compaq C
User's Guide for OpenVMS Systems

Appendix D
Appendix D	Compaq C Compiler Messages
Appendix E
Appendix E	Compaq C Limits
E.1	Contents of <float.h>
E.2	Contents of <limits.h>
Glossary
Glossary	Glossary
Index
Index
Examples
1-1	Echo Program Using Command-Line Arguments
1-2	Watch Out for Pointers to Pointers (**)
1-3	Trivial 64-Bit Exploitation
1-4	Preceding Example No Longer Trivial
2-1	External Data Declarations and Definitions
2-2	Main Program Section
2-3	Function Initializing RMS Data Structures
2-4	Internal Functions
2-5	Utility Function: Adding Records
2-6	Utility Function: Deleting Records
2-7	Utility Function: Typing the File
2-8	Utility Function: Printing the File
2-9	Utility Function: Updating the File
3-1	Passing Floating-Point Arguments by Immediate Value
3-2	Passing Arguments by Reference
3-3	Passing Arguments by Descriptor
3-4	Passing Compile-Time String Descriptors
3-5	Compaq C Function Calling a Compaq FORTRAN Subprogram
3-6	Compaq FORTRAN Subprogram Calling a Compaq C Function
3-7	Compaq C Function Emulating a Compaq FORTRAN CHARACTER*(*) Function
3-8	VAX MACRO Program Calling a Compaq C Function
3-9	Compaq C Program Calling a VAX MACRO Program
3-10	Compaq C Function Calling a Compaq BASIC Function
3-11	Compaq BASIC Program Calling a Compaq C Function
3-12	Compaq C Function Calling a Compaq Pascal Routine
3-13	Compaq Pascal Program Calling a Compaq C Function
3-14	Sharing Data with a FORTRAN Program in Named Program Sections
3-15	Sharing Data with a FORTRAN Program in a Compaq C Structure
3-16	Sharing Data with a PL/I Program in Named Program Sections
3-17	Sharing Data with a PL/I Program in a Compaq C Structure
3-18	Sharing Data with a MACRO Program in a Compaq C Structure
3-19	Checking System Service Return Values
3-20	Using Variable-Length Argument Lists
3-21	Testing for Success
3-22	Testing for Specific Return Status Values
3-23	Passing Arguments to System Services
3-24	Determining$QIO Completion
3-25	Using Time Routines
4-1	Using Global Variables
4-2	Using the globalvalue Specifier
5-1	#pragma extern_model Example
C-1	Debugging Sample Program SCALARS.C
C-2	Debugging Sample Program ARRAY.C
C-3	Debugging Sample Program STRING.C
C-4	Debugging Sample Program STRUCT.C
C-5	Debugging Sample Program ARSTRUCT.C
C-6	Debugging Sample Program POWER.C
C-7	A Sample Debugging Session
Figures
1-1	DCL Commands for Developing Programs
3-1	The Call Stack
3-2	Structure of an OpenVMS VAX Argument List
3-3	Example of an OpenVMS VAX Argument List
3-4	Passing Arguments by Immediate Value
3-5	Bit Fields Within a Return Status Value
3-6	Internal Representation of a Status Value
4-1	OpenVMS VAX Structure Alignment
4-2	OpenVMS Bit-Field Alignment
Tables
1	Conventions Used in this Guide
1-1	/ACCEPT Qualifier Options
1-2	/ANNOTATIONS Qualifier Options
1-3	/ARCHITECTURE Qualifier Options
1-4	/ASSUME Qualifier Options
1-5	/CHECK =POINTER_SIZE Qualifier Options
1-6	/COMMENTS Qualifier Options
1-7	Debugger Compilation Options
1-8	/EXTERN_MODEL Qualifier Options
1-9	/FLOAT Qualifier Options
1-10	/IEEE_MODE Options
1-11	/MACHINE_CODE Qualifier Options (VAX ONLY)
1-12	/MMS_DEPENDENCIES Qualifier Options
1-13	/NAMES Qualifier Option1 Values
1-14	/NAMES Qualifier Option2 Values
1-15	/NESTED_INCLUDE_DIRECTORY Qualifier Options
1-16	/OPTIMIZE Qualifier Options
1-17	/PDSC_MASK Qualifier Options
1-18	/POINTER_SIZE Qualifier Options
1-19	/PRECISION Qualifier Options
1-20	/PREFIX_LIBRARY_ENTRIES Qualifier Options
1-21	/PROTOTYPE Qualifier Options
1-22	/REENTRANCY Qualifier Options
1-23	/SHOW Qualifier Options
1-24	/STANDARD Qualifier Options
1-25	/WARNINGS Qualifier Options
1-26	OpenVMS Linker Default File Types for Input Files
2-1	Common RMS Run-Time Processing Functions
2-2	Compaq C RMS Header Files
2-3	RMS Data Structures
3-1	VAX Register Usage
3-2	Alpha Register Usage
3-3	Status Values of SYS$SETEF
3-4	Status Values of SYS$READEF
3-5	Valid Class Codes
3-6	Atomic Data Types
3-7	Status Values of SYS$SETPRN
3-8	Valid Parameter-Passing Mechanisms in Compaq C
3-9	Default Passing Mechanisms
3-10	OpenVMS Run-Time Library Facilities
3-11	OpenVMS System Services
3-12	Compaq C Implementation
3-13	Possible Severity Values
3-14	Facility Codes
4-1	Location, Lifetime, and the Storage-Class Keywords
4-2	Floating-Point Formats
4-3	Program-Section Attributes
4-4	External Models and Definitions
4-5	Combinations of Storage-Class Specifiers and Modifiers (ALPHA ONLY)
4-6	Combinations of Storage-Class Specifiers and Modifiers (VAX ONLY)
4-7	Combination Attributes
5-1	Comparison of Mixing Different extern_models
6-1	Predefined System Identification Macros
6-2	:_ ,_ DECC_VER Version-Type Encodings
6-3	Standards Macros---All platforms
A-1	Trigraphs
A-2	Non-ANSI Keywords
A-3	New and Traditional Spellings of Macros
C-1	Commands to Manipulate Tokens and Placeholders
C-2	Mapping Between CDD/Repository and Compaq C Data Types