1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
|
#!/usr/bin/env ruby
# -*- ruby -*-
# $Id: h2rb,v 1.1 2002/04/02 10:56:13 ttate Exp $
require 'mkmf'
require 'ftools'
$recursive = false
$force = false
$conly = true
$inc_path = []
$infilename= nil
$insert_require = true
def valid_ruby_code?(code)
begin
eval("BEGIN {return true}; #{code}")
rescue SyntaxError
return false
end
return false
end
def print_usage
print <<EOF
h2rb [-r] [-I <path>] [-d] [<filename>]
EOF
end
while( ARGV[0] )
case( ARGV[0] )
when "-r"
ARGV.shift
$recursive = true
when "-R"
ARGV.shift
$recursive = false
when "-l"
ARGV.shift
$insert_require = true
when "-L"
ARGV.shift
$insert_require = false
when "-c"
ARGV.shift
$conly = true
when "-C"
ARGV.shift
$conly = false
when "-f"
ARGV.shift
$force = true
when "-F"
ARGV.shift
$force = false
when "-I"
ARGV.shift
$inc_path << ARGV.shift
when "-d"
ARGV.shift
$DEBUG = true
when "-h","--help"
print_usage()
exit 0
when /-.*/
$stderr.print("unknown option '#{ARGV[0]}'.\n")
print_usage()
exit 0
else
$infilename = ARGV.shift
end
end
$inc_dir = File.join(CONFIG["prefix"], "lib", "ruby",
CONFIG["MAJOR"] + "." + CONFIG["MINOR"],
"dl")
class H2RBError < StandardError; end
class H2RB
def initialize(inc_dir = nil, inc_path = nil, insert_require = nil)
@inc_path = inc_path || []
@inc_dir = inc_dir || '.'
@indent = 0
@parsed_files = []
@insert_require = insert_require || false
end
def find_path(file)
if( ! file )
return nil
end
if( File.exist?(file) )
if( file[0] == ?/ )
return file
else
return file
end
end
@inc_path.each{|path|
full = File.join(path, file)
if( File.exist?(full) )
return full
end
}
return nil
end
def strip_comment(line)
if( @commented )
if( e = line.index("*/") )
line[0..(e+1)] = ""
@commented = false
else
line = ""
end
else
if( s = line.index("/*") )
if( e = line.index("*/") )
line[s..(e+1)] = ""
else
line[s..-1] = ""
@commented = true
end
elsif( s = line.index("//") )
line[s..(-1)] = ""
end
end
line.gsub!(/\s+$/,"")
return line
end
def up_indent
@indent += 1
end
def down_indent
@indent -= 1
if( @indent < 0 )
raise
end
end
def indent
" " * @indent
end
def rescue_begin
line = "#{indent}begin"
up_indent
return line
end
def rescue_nameerror
down_indent
line = [
"#{indent}rescue NameError => e",
"#{indent} raise e if( $DEBUG )",
"#{indent}end"].join($/)
return line
end
def parse_enum(line)
if( line =~ /enum\s+(\S+\s+)?\{(.+)\}/ )
enum_name = $1
enum_block = $2
if( enum_name )
line = "#{indent}# -- enum #{enum_name}\n"
else
line = "#{indent}# -- enum\n"
end
enums = enum_block.split(/,/).collect{|e| e.strip}
i = 0
enums.each{|elem|
var,val = elem.split(/=/).collect{|e| e.strip}
if( val )
i = val.to_i
end
line += "#{indent}#{var} = #{i.to_s}\n"
i += 1
}
line += "#{indent}# -- end of enum"
return line
else
return nil
end
end
def parse_define(line)
case line
when /^#\s*define\s+(\S+)\(\)/
line = nil
when /^#\s*define\s+(\S+)\((.+)\)\s+(.+)$/
if( @conly )
line = nil
else
defname = $1
defargs = $2
defval = $3
if( !valid_ruby_code?(defval) )
defval = "nil # #{defval}"
end
if( defname[0,1] =~ /^[A-Z]$/ )
line = "#{indent}#{defname} = proc{|#{defargs}| #{defval}}"
else
line = [
"#{indent}def #{defname}(#{defargs})",
"#{indent} #{defval}",
"#{indent}end"
].join("\n")
end
end
when /^#\s*define\s+(\S+)\((.+)\)$/
if( @conly )
line = nil
else
defname = $1
defargs = $2
defval = nil
if( !valid_ruby_code?(defval) )
defval = "nil # #{defval}"
end
if( defname[0,1] =~ /^[A-Z]$/ )
line = "#{indent}#{defname} = proc{|#{defargs}| #{defval}}"
else
line = [
"#{indent}def #{defname}(#{defargs})",
"#{indent} #{defval}",
"#{indent}end"
].join("\n")
end
end
when /^#\s*define\s+(\S+)\s+(.+)$/
defname = $1
defval = $2
if( !valid_ruby_code?(defval) )
defval = "nil # #{defval}"
end
line = [rescue_begin, "#{indent}#{defname} = #{defval}", rescue_nameerror].join($/)
when /^#\s*define\s+(\S+)$/
defname = $1
line = "#{indent}#{defname} = nil"
else
line = nil
end
return line
end
def parse_undef(line)
case line
when /^#\s*undef\s+([A-Z]\S+)$/
defname = $1
line = "#{indent}remove_const(:#{defname})"
when /^#\s*undef\s+(\S+)$/
defname = $1
line = "#{indent}#{defname} = nil"
else
line = nil
end
return line
end
def parse_ifdef(line)
case line
when /^#\s*ifdef\s+(\S+)$/
defname = $1
line = [
rescue_begin,
"#{indent}if( defined?(#{defname}) && ! #{defname}.nil? )"].join($/)
else
line = nil
end
return line
end
def parse_ifndef(line)
case line
when /^#\s*ifndef\s+(\S+)$/
defname = $1
line = [
rescue_begin,
"#{indent}if( ! defined?(#{defname}) || #{defname}.nil? )"].join($/)
else
line = nil
end
return line
end
def parse_if(line)
case line
when /^#\s*if\s+(.+)$/
cond = $1
cond.gsub!(/defined(.+)/){ "defined?(#{$1}) && ! #{$1}.nil?" }
if( valid_ruby_code?(cond) )
line = "#{indent}if( #{cond} )"
else
line = "#{indent}if( false ) # #{cond}"
end
line = [rescue_begin, line].join($/)
else
line = nil
end
return line
end
def parse_elif(line)
case line
when /^#\s*elif\s+(.+)$/
cond = $1
cond.gsub!("defined","defined?")
line = "#{indent}elsif( #{cond} )"
else
line = nil
end
return line
end
def parse_else(line)
case line
when /^#\s*else\s*/
line = "#{indent}else"
else
line = nil
end
return line
end
def parse_endif(line)
case line
when /^#\s*endif\s*$/
line = ["#{indent}end", rescue_nameerror].join($/)
else
line = nil
end
return line
end
def parse_include(line)
if( ! @insert_require )
return nil
end
file = nil
case line
when /^#\s*include "(.+)"$/
file = $1
line = "#{indent}require '#{file}'"
when /^#\s*include \<(.+)\>$/
file = $1
line = "#{indent}require '#{file}'"
else
line = nil
end
if( @recursive && file && (!@parsed_files.include?(file)) )
parse(file, @recursive, @force, @conly)
end
return line
end
def open_files(infilename)
if( ! infilename )
return [$stdin, $stdout]
end
old_infilename = infilename
infilename = find_path(infilename)
if( ! infilename )
$stderr.print("'#{old_infilename}' was not found.\n")
return [nil,nil]
end
if( infilename )
if( infilename[0,1] == '/' )
outfilename = File.join(@inc_dir, infilename[1..-1] + ".rb")
else
outfilename = infilename + ".rb"
end
File.mkpath(File.dirname(outfilename))
else
outfilename = nil
end
if( infilename )
fin = File.open(infilename,"r")
else
fin = $stdin
end
if( outfilename )
if( File.exist?(outfilename) && (!@force) )
$stderr.print("'#{outfilename}' have already existed.\n")
return [fin, nil]
end
fout = File.open(outfilename,"w")
else
fout = $stdout
end
$stderr.print("#{infilename} -> #{outfilename}\n")
if( fout )
dir = File.dirname(outfilename)
if( dir[0,1] != "." && dir != "" )
fout.print("if( ! $LOAD_PATH.include?('#{dir}') )\n",
" $LOAD_PATH.push('#{dir}')\n",
"end\n")
end
end
return [fin,fout]
end
def parse(infilename = nil, recursive = false, force = false, conly = false)
@commented = false
@recursive = recursive
@force = force
@conly = conly
@parsed_files << infilename
fin,fout = open_files(infilename)
if( !fin )
return
end
begin
line_number = 0
pre_line = nil
fin.each_line{|line|
line_number += 1
line.chop!
if( $DEBUG )
$stderr.print("#{line_number}:(#{@indent}):", line, "\n")
end
if( pre_line )
line = pre_line + line
pre_line = nil
end
if( line[-1,1] == "\\" )
pre_line = line[0..-2]
next
end
if( eidx = line.index("enum ") )
pre_line = line[eidx .. -1]
if( i = line.index("{") && j = line.index("}") )
line = line[0..j]
pre_line = nil
else
next
end
end
line = strip_comment(line)
case line
when /^enum\s/
line = parse_enum(line)
when /^#\s*define\s/
line = parse_define(line)
when /^#\s*undef\s/
line = parse_undef(line)
when /^#\s*ifdef\s/
line = parse_ifdef(line)
up_indent
when /^#\s*ifndef\s/
line = parse_ifndef(line)
up_indent
when /^#\s*if\s/
line = parse_if(line)
up_indent
when /^#\s*elif\s/
down_indent
line = parse_elif(line)
up_indent
when /^#\s*else/
down_indent
line = parse_else(line)
up_indent
when /^#\s*endif/
down_indent
line = parse_endif(line)
when /^#\s*include\s/
line = parse_include(line)
else
line = nil
end
if( line && fout )
fout.print(line, " # #{line_number}",$/)
end
}
ensure
fin.close if fin
fout.close if fout
end
end
end
h2rb = H2RB.new($inc_dir, $inc_path, $insert_require)
h2rb.parse($infilename, $recursive, $force, $conly)
|