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iplindex.icn
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2000-07-29
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132 lines
############################################################################
#
# File: iplindex.icn
#
# Subject: Program to produce indexed listing of the program library
#
# Author: Ralph E. Griswold
#
# Date: March 3, 1996
#
###########################################################################
#
# This file is in the public domain.
#
############################################################################
#
# The following options are supported:
#
# -k i width keyword field, default 16
# -p i width of field for program name, default 12
#
# Some noise words are omitted (see "exceptions" in the program text).
# If a file named except.wrd is open and readable in the current directory,
# the words in it are used instead.
#
# This program is pretty simple. Possible extensions include ways
# of specifying words to be omitted, more flexible output formatting, and
# so on. Another "embellisher's delight".
#
# This program was derived from kwic.icn by Steve Wampler.
#
# The format of the output was suggested by Gregg Townsend.
#
############################################################################
#
# Links: options
#
############################################################################
link options
global line, loc, exceptions, key_width, program_width, tag
record pair(name, line)
procedure main(args)
local exceptfile, opts
opts := options(args, "k+p+")
key_width := \opts["k"] | 16
program_width := \opts["p"] | 12
if exceptfile := open("except.wrd") then {
exceptions := set()
every insert(exceptions, lcword(exceptfile))
close(exceptfile)
}
else
exceptions := set(["and", "for", "into", "all", "from", "get", "put",
"compute", "perform", "apply", "model", "value", "model", "operator",
"out", "problem", "produce", "such", "use", "operation",
"between", "data", "different", "down", "miscellaneous", "non",
"obtaining", "using", "value", "values", "various", "with",
"begin", "end", "not", "way", "possible", "required", "until",
"that", "within", "once", "the"
])
write(left("keyword", key_width), left("location", program_width),
"description")
write()
every write(filter(indexer(&input)))
end
procedure indexer(file)
local index, word
# Each word, in lowercase form, is a key in the table "index".
# The corresponding values are lists of the lines for that word.
index := table()
every word := lcword(file) do {
if not member(exceptions,word) then {
/index[word] := []
index[word] := put(index[word],line)
}
}
index := sort(index,3)
# while get(index) do
# suspend !get(index)
while name := get(index) do
suspend pair(name, !get(index))
end
procedure lcword(file)
local name, word
static chars
initial {
chars := &letters ++ &digits
tag := table()
}
every line := !file do {
line ?:= {
name := tab(find(": ")) # program name
move(2) # skip trash
tab(0) # rest is now line
}
tag[line] := name # name for the line
line ? {
while tab(loc := upto(chars)) do {
word := map(tab(many(chars)))
if *word > 2 & not(any('(')) then suspend word
}
}
}
end
procedure filter(result)
return left(result.name, key_width) ||
left(tag[result.line], program_width) || result.line
end