Intel(R) Fortran Compiler for Linux* Systems User's Guide Volume I ...

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Intel® Fortran Compiler for Linux* Systems User's Guide Volume I: Building Applications List-directed Namelist Unformatted External file, direct access Formatted Unformatted Internal file Formatted List-directed Unformatted READ, WRITE, PRINT, ACCEPT, TYPE READ, WRITE, PRINT, ACCEPT, TYPE READ, WRITE, REWRITE READ, WRITE, REWRITE READ, WRITE, REWRITE READ, WRITE READ, WRITE None 140 Note You can use the REWRITE statement only for relative files, using direct access. Files and File Characteristics Files and File Characteristics Overview See these topics: File Organization Internal Files and Scratch Files Record Types Record Overhead Record Length File Organization File organization refers to the way records are physically arranged on a storage device. Intel Fortran supports two kinds of file organization: • Sequential
Intel® Fortran Compiler for Linux* Systems User's Guide, Volume I: Building Applications • Relative The default file organization is always ORGANIZATION= 'SEQUENTIAL' for an OPEN statement. The organization of a file is specified by means of the ORGANIZATION specifier in the OPEN statement. You can store sequential files on magnetic tape or disk devices, and can use other peripheral devices, such as terminals, pipes, and line printers as sequential files. You must store relative files on a disk device. Sequential Organization A sequentially organized file consists of records arranged in the sequence in which they are written to the file (the first record written is the first record in the file, the second record written is the second record in the file, and so on). As a result, records can be added only at the end of the file. Sequential files are usually read sequentially, starting with the first record in the file. Sequential files with a fixed-length record type that are stored on disk can also be accessed by relative record number (direct access). Relative Organization Within a relative file are numbered positions, called cells. These cells are of fixed equal length and are consecutively numbered from 1 to n, where 1 is the first cell, and n is the last available cell in the file. Each cell either contains a single record or is empty. Records in a relative file are accessed according to cell number. A cell number is a record's relative record number (its location relative to the beginning of the file). By specifying relative record numbers, you can directly retrieve, add, or delete records regardless of their locations (direct access). (Detecting deleted records is only available if you specified the -vms option when the program was compiled.) When creating a relative file, use the RECL value to determine the size of the fixed-length cells. Within the cells, you can store records of varying length, as long as their size does not exceed the cell size. Internal Files and Scratch Files Intel Fortran also supports two other types of files that are not file organizations: 141
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Intel(R) Fortran Compiler for Linux
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Table Of Contents Table Of Contents
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Table Of Contents Predefined Prepro
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Table Of Contents -e90 or -e95 ....
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Table Of Contents -[no]fpconstant .
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Table Of Contents -noinclude ......
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Table Of Contents -par_threshold n.
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Table Of Contents Using Debugger Co
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Table Of Contents Limitations of Nu
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Table Of Contents Specifiers for Fi
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Table Of Contents Programming with
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Table Of Contents Run-Time Message
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About the Intel® Fortran Compiler
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Intel® Fortran Compiler for Linux*
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Index ! !DEC$ prefix ..............
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Index -assume dummy_aliases compile
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Index common blocks allocating ....
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Index compiler option -convert meth
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Index additional...................
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Index file information OPEN stateme
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Index FOR$IOS_FLTOVF error message
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Index FOR$IOS_TOOMANREC error messa
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Index -fvisibility-keyword compiler
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Index -ip_no_pinlining compiler opt
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Index manuals additional...........
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Index -nus compiler option.........
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Index -pad_source compiler option..
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Index record characteristics OPEN s
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Index signal routine calling ......
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Index uninstall.sh file ...........
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Intel(R) Fortran Compiler for Linux* Systems User's Guide Volume I ...

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