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############################################################################
#
# File: nocr.icn
#
# Subject: Program to convert MS-DOS text files to UNIX
#
# Author: Richard L. Goerwitz
#
# Date: December 30, 1991
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# Version: 1.4
#
############################################################################
#
# This program simply converts \r\n to \n in each line of each of the
# files supplied as command-line arguments, thereby effecting conversion
# of MS-DOS format text files to the corresponding UNIX format.
#
# usage: nocr file1 [file2 [etc.]]
#
# No check done to see whether the file is in fact a text file.
#
############################################################################
#
# Requires: UNIX or MS-DOS
#
# See also: yescr.icn
#
############################################################################
procedure main(a)
local fname, infile, outfile, line, temp_name
# Static variables, initial clause not really necessary in main().
static slash, l, ms, DOSos, nok, ok
initial {
nok := string(~&letters)
ok := repl("X",*nok)
# Find us a place to put temporary files.
if find("UNIX",&features) then {
slash := "/"
l := 10
ms := ""
}
else if find("MS-DOS", &features) then {
slash := "\\"
l := 8
ms := "u"
DOSos := 1
}
# Don't take this out unless you're sure of what you're doing.
else stop("nocr: tested only under UNIX and MS-DOS")
}
# Check to see if we have any arguments.
*a = 0 & stop("usage: nocr file1 [file2...]")
# Start popping filenames off of the argument list.
while fname := pop(a) do {
# Open input file.
infile := open(fname,"r") | (er_out(fname), next)
# Get temporary file name.
every temp_name :=
pathname(fname, slash) ||
map(left(basename(fname,slash),l,"X"), nok, ok) ||
"." || right(0 to 999,3,"0")
do close(open(temp_name)) | break
# Open temporary file.
outfile := open(\temp_name,"w"||ms) | (er_out(fname), next)
if \DOSos then {
# Infile above was opened in translate mode (removing the CR),
# while outfile was opened in untranslate mode (automatically
# writing the line in UNIX format).
while write(outfile,read(infile))
}
else {
# If not running under DOS, then we're under UNIX (unless
# we've been hacked). Trim CR manually, then write.
while line := read(infile) do {
if line[-1] == "\x0D" then
line[-1] := ""
write(outfile, line)
}
}
# Close opened input and output files.
close(infile) | stop("nocr: cannot close, ",fname,"; aborting")
close(outfile) | stop("nocr: cannot close, ",temp_name,"; aborting")
# Remove physical input file.
remove(fname) | stop("nocr: cannot remove ",fname,"; aborting")
# Give temp name the same name as the input file, completing the
# conversion process.
rename(temp_name,fname) |
stop("nocr: Can't find temp file ",temp_name,"; aborting")
}
end
procedure er_out(s)
write(&errout,"nocr: cannot open ",s," for reading")
return
end
procedure basename(s,slash)
s ? {
while tab(find(slash)+1)
return tab(0)
}
end
procedure pathname(s,slash)
local s2
s2 := ""
s ? {
while s2 ||:= tab(find(slash)+1)
return s2
}
end
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