| Chapter 13 |
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13
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Using HP COBOL in the Alpha, I64, or VAX Common Language Environment
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13.1
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Routines, Procedures, and Functions
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13.2
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The OpenVMS Calling Standard (OpenVMS)
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13.2.1
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Register and Stack Usage (Alpha, I64)
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13.2.2
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Return of the Function Value
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13.2.3
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The Argument List
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13.3
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OpenVMS System Routines (OpenVMS)
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13.3.1
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OpenVMS Run-Time Library Routines
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13.3.2
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System Services
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13.4
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Calling Routines
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13.4.1
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Determining the Type of Call (OpenVMS)
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13.4.2
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Defining the Argument (OpenVMS)
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13.4.3
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Calling the External Routine (OpenVMS)
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13.4.4
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Calling System Routines (OpenVMS)
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13.4.4.1
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System Routine Arguments (OpenVMS)
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13.4.4.2
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Calling a System Routine in a Function Call (OpenVMS)
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13.4.4.3
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Calling a System Routine in a Procedure Call (OpenVMS)
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13.4.5
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Checking the Condition Value (OpenVMS)
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13.4.5.1
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Library Return Status and Condition Value Symbols (OpenVMS)
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13.4.6
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Locating the Result (OpenVMS)
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13.5
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Establishing and Removing User Condition Handlers (OpenVMS)
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13.6
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Examples (OpenVMS)
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| Chapter 14 |
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14
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Using the REFORMAT Utility
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14.1
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Running the REFORMAT Utility
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14.2
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ANSI-to-Terminal Format Conversion
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14.3
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Terminal-to-ANSI Format Conversion
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14.4
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REFORMAT Error Messages
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| Chapter 15 |
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15
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Optimizing Your HP COBOL Program
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15.1
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Specifying Optimization on the Compiler Command Line (Alpha, I64)
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15.2
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Specifying Alignment of Data for Optimum Performance (Alpha, I64)
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15.3
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Using COMP Data Items for Speed
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15.4
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Other Ways to Improve the Performance of Operations on Numeric Data
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15.4.1
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Mixing Scale Factors and Data Types
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15.4.2
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Limiting Significant Digits
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15.4.3
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Reducing the Compexity of Arithmetic Expressions
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15.4.4
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Selection of Data Types (OpenVMS)
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15.5
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Choices in Procedure Division Statements
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15.5.1
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Using Indexing Instead of Subscripting
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15.5.2
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Using SEARCH ALL Instead of SEARCH
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15.5.3
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Selecting Hypersort or SORT-32 for Sorting Tasks
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15.5.4
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Minimizing USE Procedures with LINKAGE SECTION References
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15.6
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I/O Operations
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15.6.1
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Using the APPLY Clause
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15.6.1.1
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Using the PREALLOCATION Phrase of the APPLY Clause (OpenVMS)
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15.6.1.2
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Using the EXTENSION Phrase of the APPLY Clause (OpenVMS)
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15.6.1.3
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Using the DEFERRED-WRITE Phrase of the APPLY Clause (OpenVMS)
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15.6.1.4
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Using the FILL-SIZE ON Phrase of the APPLY Clause (OpenVMS)
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15.6.1.5
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Using the WINDOW Phrase of the APPLY Clause (OpenVMS)
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15.6.2
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Using Multiple Buffers
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15.6.3
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Sharing Record Areas
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15.6.4
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Using COMP Unsigned Longword Integers
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15.7
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Optimizing File Design (OpenVMS)
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15.7.1
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Sequential Files
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15.7.2
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Relative Files
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15.7.2.1
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Maximum Record Number (MRN)
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15.7.2.2
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Cell Size
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15.7.2.3
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Bucket Size
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15.7.2.4
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File Size
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15.7.3
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Indexed Files
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15.7.3.1
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Optimizing Indexed File I/O
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15.7.3.2
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Calculating Key Index Levels
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15.7.3.3
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Caching Index Roots
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15.8
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Image Activation Optimization (Tru64 UNIX)
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