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1#
2# This script parses a command_table file into something which is a bit
3# easier for an awk script to understand.
4#
5# Input syntax: a .ct file
6#
7# Output syntax:
8# (for the command_table line)
9#	command_table  <command_table>
10#
11#(for each request definition)
12#	BOR
13#	sub: <subroutine name>
14#	hlp: <help text>
15#	cmd: <command>
16#	opt: <option>
17#	EOR
18# (there may be more than one 'cmd' or 'opt' line
19#
20# A number sent to the output represents a parse error --- it will be
21# followed by the next line which will have the form:
22#	ERROR: <error text>
23#
24# The design of this output syntax is such that it should be easy for
25# an awk script to parse.
26
27#
28# The first section of this script is just to cannoicalize the file.
29# It removes comments, and puts each command_table request onto a single
30# line
31#
32:FIRST
33y/	/ /
34s/^ *//
35s/#.*$//
36/; *$/!{
37N
38y/	/ /
39s/\n */ /
40bFIRST
41}
42s/, */, /g
43#
44# Now we take care of some syntatic sugar.....
45#
46/^unimplemented/ {
47	s/^unimplemented [A-Za-z_0-9]*/request ss_unimplemented/
48	s/;/, (dont_list, dont_summarize);/
49}
50/^unknown/ {
51	s/^unknown /request ss_unknown, "", /
52}
53#
54# Dispatch based on the keyword....  illegal keywords are prefixed by ERROR:
55# and are handled by the awk script.
56#
57/^command_table /bCMD
58/^request /bREQUEST
59/^end;/bEND
60s/ .*//
61s/^/ERROR: unknown keyword: /
62=
63b
64#
65# Handle the command_table keyword
66#
67:CMD
68s/;$//
69p
70d
71b
72#
73# Handle the request keyword --- this is the heart of the sed script.
74#
75:REQUEST
76s/^request *//
77h
78i\
79BOR
80# First, parse out the subroutine name
81s/^/sub: /
82s/,.*//
83p
84# Next, parse out the help message, being careful to handle a quoted string
85g
86s/^[^,]*, *//
87h
88/^"/ {
89	s/^"//
90	s/".*//
91	x
92	s/^"[^"]*", *//
93	x
94	b EMITHLP
95}
96s/[^a-zA-Z0-9].*//
97x
98s/[a-zA-Z0-9]*, *//
99x
100:EMITHLP
101s/^/hlp: /
102p
103# Next take care of the command names
104:CMDLIST
105g
106/^(/b OPTIONS
107/^;/b EOR
108/^"/ {
109	s/^"//
110	s/".*//
111	x
112	s/^"[^"]*"//
113	s/, *//
114	x
115	b EMITREQ
116}
117s/[^A-Za-z_0-9].*//
118x
119s/[A-Za-z_0-9]*//
120s/, *//
121x
122:EMITREQ
123s/^/cmd: /
124p
125b CMDLIST
126#
127# Here we parse the list of options.
128#
129: OPTIONS
130g
131s/^(//
132h
133: OPTLIST
134/^)/ b EOR
135/^[^A-Za-z_0-9]/ {
136	=
137	c\
138ERROR: parse error in options list
139}
140s/[^A-Za-z_0-9].*//
141x
142s/[A-Za-z_0-9]*//
143s/, *//
144x
145s/^/opt: /
146p
147g
148b OPTLIST
149: EOR
150c\
151EOR\
152
153d
154b
155#
156# Handle the end keyword --- it's basically ignored.
157#
158:END
159d
160b
161