9.12 Fixeols
9.12 Fixeols
The fixeols command takes two filename arguments: an input file and an
output file. It reads in the input file and writes it to the output file changing all
the end of line control character sequences to the local format. It can also take
one filename argument, in which case it replaces the target file with its
Syntax  : fixeols = "fixeols" s filename [s filename]
1 Introduction
Examples: fixeols imported.hak result.kln
2 Interface
          fixeols sloth.dat
3 Scanner
The fixeols command works by parsing the input file into alternating runs of
4 Parser
printable characters (ASCII 20 to ASCII 126) and runs of non printable
5 Analyser
characters (all the others). It then parses each run of non printable characters
6 Tangle
from left to right into subruns of non printables not containing the same
7 Weave
character twice. It then replaces each subrun with a native EOL. (Note: A
native EOL can be inserted into a text file in a portable manner simply by
8 Shell
writing "
" to the text output stream). For example, if a native EOL is X, and
9 Commands
ABCD are non printable characters, and the file to be converted is
10 Glossary
11 References
thisABisABCDanABABexampleABCCCof the conversion.
then fixeols would produce
thisXisXanXXexampleXXXof the conversion.
The fixeols command was devised to solve the problem created sometimes
when text files are moved from one machine to another (e.g. with the Kermit
program) using a binary transfer mode rather than a text transfer mode. If such
a transfer is made, and the text file line termination conventions differ on the
two machines, one can wind up with a set of text files with improperly
terminated lines. This can cause problems on a number of fronts, but in
particular affects regression testing which relies heavily on exact comparisons
between files. The fixeols command provides a solution to this problem by
providing a portable way to "purify" text files whose end of lines have become
incorrect. The regression testing scripts all apply fixeols to their input and
output files before each test.
Copyright   Ross N. Williams 1992,1999. All rights reserved.
http://www.ross.net/funnelweb/reference/commands_fixeols.html [3/3/2000 10:44:55 PM]

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