- FORTRAN READ LAST LINE FROM FILE PDF
- FORTRAN READ LAST LINE FROM FILE PORTABLE
- FORTRAN READ LAST LINE FROM FILE ISO
Before commenting a file, think about how you or some other user may want to process that information. Where possible, comments should be in a well-defined parseable format such as the ``keyword = value' syntax used by JPL's Spaceflight Operations Center (SFOC) and Planetary Data System (PDS). Comments in a file should provide summary and pedigree information that would assist users of that data, or should at least include a pointer to that information, such as the name and address of a person who knows it. While the purpose of this document is not to define the kind of information that these comments should include, the following suggestions may be helpful.
FORTRAN READ LAST LINE FROM FILE PDF
The SPICELIB routine is the ONLY routine that you may use to store comments in a DAF.īeck World At Risk Pdf Writer.
FORTRAN READ LAST LINE FROM FILE PORTABLE
If you abide by this rule, your commented DAF files will be portable to practically any computer platform. The maximum line length in the comment area should not exceed 80 characters. The following restrictions apply to the comment area of a DAF: - The comment area may contain ONLY text (printable ASCII characters, namely ASCII 32-126). We call this text ``comments,' and the comment records themselves are the physical area of the file that we call the ``comment area.' ' A DAF may contain any number of comment records, and there are DAF subroutines that add and remove comment records. One of the DAF record types is a ``comment record.' ' (These were referred to in some older documentation as ``reserved records.' ') Comment records store lines of text. A DAF is a direct access FORTRAN 77 file which is organized into five types of physical records. However, we briefly introduce DAF here in order to explain the comment area.įor additional information about the DAF architecture and its associated subroutines, refer to the DAF Required Reading. Typically, you need know little about DAFs when reading these files using their associated reader subroutines or when accessing the comment area using the SPC subroutines. The Comment Area SPK, binary PCK, and CK files are instances of the SPICELIB Double Precision Array File (DAF). This SPC Required Reading is a supplement to the DAF Required Reading.
FORTRAN READ LAST LINE FROM FILE ISO
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User application programs can manipulate the comment area of a DAF-based binary format file-for example an SPK, binary PCK, or CK-by calling the family of subroutines described in this document. Usually the easiest way to comment DAF and DAS files is to use the SPICE program COMMNT, which is able to add, read, delete, or extract comments to or from a DAF or DAS file. You may comment text SPICE kernels simply by editing the files using any text editor. The SPICE system contains three types of kernel files: sequential text kernel files and two types of direct access binary kernel files: DAF and DAS.
However, the presence of comments does not interfere with the use of the data. These comments are internal to the file and thus attached to the data. Introduction Within the SPICE system, every kernel file may have its own internal documentation, called comments, that describe the type of data contained within the file, for example, its origin, pedigree, recommended use, and catalog information. Abstract SPC routines deal with the comment area of binary kernel files based on the DAF architecture - SPKs, CKs, binary PCKs.
SPC Required Reading: Comments in binary DAFs Table of Contents SPC Required Reading: Comments in binary DAFs Last revised on 2004 DEC 26 by B. I want to write over the values of an input text file for a particular line number in the file.
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