Commit | Line | Data |
---|---|---|
86a59229 | 1 | #!/usr/bin/perl |
4633a7c4 LW |
2 | |
3 | use Config; | |
4 | use File::Basename qw(&basename &dirname); | |
8a5546a1 | 5 | use Cwd; |
231bc313 JH |
6 | use subs qw(link); |
7 | ||
6ef9d486 | 8 | sub link { # This is a cut-down version of installperl:link(). |
231bc313 JH |
9 | my($from,$to) = @_; |
10 | my($success) = 0; | |
11 | ||
12 | eval { | |
13 | CORE::link($from, $to) | |
14 | ? $success++ | |
15 | : ($from =~ m#^/afs/# || $to =~ m#^/afs/#) | |
16 | ? die "AFS" # okay inside eval {} | |
17 | : die "Couldn't link $from to $to: $!\n"; | |
18 | }; | |
19 | if ($@) { | |
231bc313 JH |
20 | require File::Copy; |
21 | File::Copy::copy($from, $to) | |
22 | ? $success++ | |
23 | : warn "Couldn't copy $from to $to: $!\n"; | |
24 | } | |
25 | $success; | |
26 | } | |
4633a7c4 LW |
27 | |
28 | # List explicitly here the variables you want Configure to | |
29 | # generate. Metaconfig only looks for shell variables, so you | |
30 | # have to mention them as if they were shell variables, not | |
31 | # %Config entries. Thus you write | |
32 | # $startperl | |
33 | # to ensure Configure will look for $Config{startperl}. | |
34 | ||
35 | # This forces PL files to create target in same directory as PL file. | |
36 | # This is so that make depend always knows where to find PL derivatives. | |
8a5546a1 | 37 | $origdir = cwd; |
44a8e56a | 38 | chdir dirname($0); |
39 | $file = basename($0, '.PL'); | |
774d564b | 40 | $file .= '.com' if $^O eq 'VMS'; |
4633a7c4 LW |
41 | |
42 | open OUT,">$file" or die "Can't create $file: $!"; | |
43 | ||
44 | print "Extracting $file (with variable substitutions)\n"; | |
45 | ||
46 | # In this section, perl variables will be expanded during extraction. | |
47 | # You can use $Config{...} to use Configure variables. | |
48 | ||
49 | print OUT <<"!GROK!THIS!"; | |
5f05dabc | 50 | $Config{startperl} |
51 | eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}' | |
52 | if \$running_under_some_shell; | |
c0393c90 JH |
53 | my \$startperl; |
54 | my \$perlpath; | |
ed6d8ea1 JH |
55 | (\$startperl = <<'/../') =~ s/\\s*\\z//; |
56 | $Config{startperl} | |
57 | /../ | |
58 | (\$perlpath = <<'/../') =~ s/\\s*\\z//; | |
59 | $Config{perlpath} | |
60 | /../ | |
a687059c LW |
61 | !GROK!THIS! |
62 | ||
4633a7c4 LW |
63 | # In the following, perl variables are not expanded during extraction. |
64 | ||
65 | print OUT <<'!NO!SUBS!'; | |
a687059c | 66 | |
9ae2b9a0 | 67 | $0 =~ s/^.*?(\w+)[\.\w]*$/$1/; |
86a59229 WL |
68 | |
69 | # (p)sed - a stream editor | |
70 | # History: Aug 12 2000: Original version. | |
d16f50bd | 71 | # Mar 25 2002: Rearrange generated Perl program. |
e2f73067 | 72 | # Jul 23 2007: Fix bug in regex stripping (M.Thorland) |
86a59229 WL |
73 | |
74 | use strict; | |
75 | use integer; | |
76 | use Symbol; | |
8d063cd8 | 77 | |
d83e3bda JM |
78 | =head1 NAME |
79 | ||
ba34211e | 80 | psed - a stream editor |
d83e3bda JM |
81 | |
82 | =head1 SYNOPSIS | |
83 | ||
ba34211e JH |
84 | psed [-an] script [file ...] |
85 | psed [-an] [-e script] [-f script-file] [file ...] | |
86 | ||
87 | s2p [-an] [-e script] [-f script-file] | |
d83e3bda JM |
88 | |
89 | =head1 DESCRIPTION | |
90 | ||
86a59229 WL |
91 | A stream editor reads the input stream consisting of the specified files |
92 | (or standard input, if none are given), processes is line by line by | |
93 | applying a script consisting of edit commands, and writes resulting lines | |
94 | to standard output. The filename `C<->' may be used to read standard input. | |
95 | ||
96 | The edit script is composed from arguments of B<-e> options and | |
97 | script-files, in the given order. A single script argument may be specified | |
98 | as the first parameter. | |
99 | ||
100 | If this program is invoked with the name F<s2p>, it will act as a | |
f7964948 | 101 | sed-to-Perl translator. See L<"SED SCRIPT TRANSLATION">. |
d83e3bda | 102 | |
86a59229 | 103 | B<sed> returns an exit code of 0 on success or >0 if an error occurred. |
d83e3bda | 104 | |
86a59229 | 105 | =head1 OPTIONS |
d83e3bda | 106 | |
86a59229 | 107 | =over 4 |
d83e3bda | 108 | |
86a59229 | 109 | =item B<-a> |
d83e3bda | 110 | |
86a59229 WL |
111 | A file specified as argument to the B<w> edit command is by default |
112 | opened before input processing starts. Using B<-a>, opening of such | |
113 | files is delayed until the first line is actually written to the file. | |
114 | ||
115 | =item B<-e> I<script> | |
116 | ||
117 | The editing commands defined by I<script> are appended to the script. | |
118 | Multiple commands must be separated by newlines. | |
119 | ||
120 | =item B<-f> I<script-file> | |
121 | ||
122 | Editing commands from the specified I<script-file> are read and appended | |
123 | to the script. | |
d83e3bda JM |
124 | |
125 | =item B<-n> | |
126 | ||
86a59229 WL |
127 | By default, a line is written to standard output after the editing script |
128 | has been applied to it. The B<-n> option suppresses automatic printing. | |
129 | ||
130 | =back | |
131 | ||
132 | =head1 COMMANDS | |
133 | ||
134 | B<sed> command syntax is defined as | |
135 | ||
136 | Z<> Z<> Z<> Z<>[I<address>[B<,>I<address>]][B<!>]I<function>[I<argument>] | |
137 | ||
138 | with whitespace being permitted before or after addresses, and between | |
139 | the function character and the argument. The I<address>es and the | |
140 | address inverter (C<!>) are used to restrict the application of a | |
141 | command to the selected line(s) of input. | |
142 | ||
143 | Each command must be on a line of its own, except where noted in | |
144 | the synopses below. | |
145 | ||
146 | The edit cycle performed on each input line consist of reading the line | |
147 | (without its trailing newline character) into the I<pattern space>, | |
148 | applying the applicable commands of the edit script, writing the final | |
149 | contents of the pattern space and a newline to the standard output. | |
150 | A I<hold space> is provided for saving the contents of the | |
151 | pattern space for later use. | |
152 | ||
153 | =head2 Addresses | |
154 | ||
155 | A sed address is either a line number or a pattern, which may be combined | |
156 | arbitrarily to construct ranges. Lines are numbered across all input files. | |
157 | ||
158 | Any address may be followed by an exclamation mark (`C<!>'), selecting | |
159 | all lines not matching that address. | |
d83e3bda | 160 | |
86a59229 | 161 | =over 4 |
d83e3bda | 162 | |
86a59229 WL |
163 | =item I<number> |
164 | ||
165 | The line with the given number is selected. | |
166 | ||
167 | =item B<$> | |
168 | ||
169 | A dollar sign (C<$>) is the line number of the last line of the input stream. | |
170 | ||
171 | =item B</>I<regular expression>B</> | |
172 | ||
173 | A pattern address is a basic regular expression (see | |
f7964948 | 174 | L<"BASIC REGULAR EXPRESSIONS">), between the delimiting character C</>. |
86a59229 WL |
175 | Any other character except C<\> or newline may be used to delimit a |
176 | pattern address when the initial delimiter is prefixed with a | |
177 | backslash (`C<\>'). | |
d83e3bda JM |
178 | |
179 | =back | |
180 | ||
86a59229 | 181 | If no address is given, the command selects every line. |
d83e3bda | 182 | |
86a59229 WL |
183 | If one address is given, it selects the line (or lines) matching the |
184 | address. | |
d83e3bda | 185 | |
86a59229 WL |
186 | Two addresses select a range that begins whenever the first address |
187 | matches, and ends (including that line) when the second address matches. | |
188 | If the first (second) address is a matching pattern, the second | |
189 | address is not applied to the very same line to determine the end of | |
190 | the range. Likewise, if the second address is a matching pattern, the | |
191 | first address is not applied to the very same line to determine the | |
192 | begin of another range. If both addresses are line numbers, | |
193 | and the second line number is less than the first line number, then | |
194 | only the first line is selected. | |
d83e3bda | 195 | |
d83e3bda | 196 | |
86a59229 | 197 | =head2 Functions |
d83e3bda | 198 | |
86a59229 WL |
199 | The maximum permitted number of addresses is indicated with each |
200 | function synopsis below. | |
d83e3bda | 201 | |
86a59229 WL |
202 | The argument I<text> consists of one or more lines following the command. |
203 | Embedded newlines in I<text> must be preceded with a backslash. Other | |
204 | backslashes in I<text> are deleted and the following character is taken | |
205 | literally. | |
d83e3bda | 206 | |
86a59229 | 207 | =over 4 |
d83e3bda | 208 | |
86a59229 WL |
209 | =cut |
210 | ||
211 | my %ComTab; | |
d16f50bd | 212 | my %GenKey; |
86a59229 WL |
213 | #-------------------------------------------------------------------------- |
214 | $ComTab{'a'}=[ 1, 'txt', \&Emit, '{ push( @Q, <<'."'TheEnd' ) }\n" ]; #ok | |
215 | ||
216 | =item [1addr]B<a\> I<text> | |
217 | ||
218 | Write I<text> (which must start on the line following the command) | |
219 | to standard output immediately before reading the next line | |
220 | of input, either by executing the B<N> function or by beginning a new cycle. | |
221 | ||
222 | =cut | |
223 | ||
224 | #-------------------------------------------------------------------------- | |
225 | $ComTab{'b'}=[ 2, 'str', \&Branch, '{ goto XXX; }' ]; #ok | |
226 | ||
227 | =item [2addr]B<b> [I<label>] | |
228 | ||
229 | Branch to the B<:> function with the specified I<label>. If no label | |
230 | is given, branch to the end of the script. | |
231 | ||
232 | =cut | |
233 | ||
234 | #-------------------------------------------------------------------------- | |
235 | $ComTab{'c'}=[ 2, 'txt', \&Change, <<'-X-' ]; #ok | |
236 | { print <<'TheEnd'; } $doPrint = 0; goto EOS; | |
237 | -X- | |
238 | ### continue OK => next CYCLE; | |
239 | ||
240 | =item [2addr]B<c\> I<text> | |
241 | ||
242 | The line, or range of lines, selected by the address is deleted. | |
243 | The I<text> (which must start on the line following the command) | |
244 | is written to standard output. With an address range, this occurs at | |
245 | the end of the range. | |
246 | ||
247 | =cut | |
248 | ||
249 | #-------------------------------------------------------------------------- | |
250 | $ComTab{'d'}=[ 2, '', \&Emit, <<'-X-' ]; #ok | |
251 | { $doPrint = 0; | |
252 | goto EOS; | |
253 | } | |
254 | -X- | |
255 | ### continue OK => next CYCLE; | |
256 | ||
257 | =item [2addr]B<d> | |
258 | ||
259 | Deletes the pattern space and starts the next cycle. | |
260 | ||
261 | =cut | |
262 | ||
263 | #-------------------------------------------------------------------------- | |
264 | $ComTab{'D'}=[ 2, '', \&Emit, <<'-X-' ]; #ok | |
265 | { s/^.*\n?//; | |
266 | if(length($_)){ goto BOS } else { goto EOS } | |
267 | } | |
268 | -X- | |
269 | ### continue OK => next CYCLE; | |
270 | ||
271 | =item [2addr]B<D> | |
272 | ||
273 | Deletes the pattern space through the first embedded newline or to the end. | |
274 | If the pattern space becomes empty, a new cycle is started, otherwise | |
275 | execution of the script is restarted. | |
276 | ||
277 | =cut | |
278 | ||
279 | #-------------------------------------------------------------------------- | |
280 | $ComTab{'g'}=[ 2, '', \&Emit, '{ $_ = $Hold };' ]; #ok | |
281 | ||
282 | =item [2addr]B<g> | |
283 | ||
284 | Replace the contents of the pattern space with the hold space. | |
285 | ||
286 | =cut | |
287 | ||
288 | #-------------------------------------------------------------------------- | |
289 | $ComTab{'G'}=[ 2, '', \&Emit, '{ $_ .= "\n"; $_ .= $Hold };' ]; #ok | |
290 | ||
291 | =item [2addr]B<G> | |
292 | ||
293 | Append a newline and the contents of the hold space to the pattern space. | |
294 | ||
295 | =cut | |
296 | ||
297 | #-------------------------------------------------------------------------- | |
298 | $ComTab{'h'}=[ 2, '', \&Emit, '{ $Hold = $_ }' ]; #ok | |
299 | ||
300 | =item [2addr]B<h> | |
301 | ||
302 | Replace the contents of the hold space with the pattern space. | |
303 | ||
304 | =cut | |
305 | ||
306 | #-------------------------------------------------------------------------- | |
307 | $ComTab{'H'}=[ 2, '', \&Emit, '{ $Hold .= "\n"; $Hold .= $_; }' ]; #ok | |
308 | ||
309 | =item [2addr]B<H> | |
310 | ||
311 | Append a newline and the contents of the pattern space to the hold space. | |
312 | ||
313 | =cut | |
314 | ||
315 | #-------------------------------------------------------------------------- | |
316 | $ComTab{'i'}=[ 1, 'txt', \&Emit, '{ print <<'."'TheEnd' }\n" ]; #ok | |
317 | ||
318 | =item [1addr]B<i\> I<text> | |
319 | ||
320 | Write the I<text> (which must start on the line following the command) | |
321 | to standard output. | |
322 | ||
323 | =cut | |
324 | ||
325 | #-------------------------------------------------------------------------- | |
326 | $ComTab{'l'}=[ 2, '', \&Emit, '{ _l() }' ]; #okUTF8 | |
327 | ||
328 | =item [2addr]B<l> | |
329 | ||
330 | Print the contents of the pattern space: non-printable characters are | |
331 | shown in C-style escaped form; long lines are split and have a trailing | |
332 | `C<\>' at the point of the split; the true end of a line is marked with | |
333 | a `C<$>'. Escapes are: `\a', `\t', `\n', `\f', `\r', `\e' for | |
334 | BEL, HT, LF, FF, CR, ESC, respectively, and `\' followed by a three-digit | |
335 | octal number for all other non-printable characters. | |
336 | ||
337 | =cut | |
338 | ||
339 | #-------------------------------------------------------------------------- | |
340 | $ComTab{'n'}=[ 2, '', \&Emit, <<'-X-' ]; #ok | |
341 | { print $_, "\n" if $doPrint; | |
d16f50bd | 342 | printQ() if @Q; |
86a59229 WL |
343 | $CondReg = 0; |
344 | last CYCLE unless getsARGV(); | |
345 | chomp(); | |
346 | } | |
347 | -X- | |
348 | ||
349 | =item [2addr]B<n> | |
350 | ||
351 | If automatic printing is enabled, write the pattern space to the standard | |
352 | output. Replace the pattern space with the next line of input. If | |
353 | there is no more input, processing is terminated. | |
354 | ||
355 | =cut | |
356 | ||
357 | #-------------------------------------------------------------------------- | |
358 | $ComTab{'N'}=[ 2, '', \&Emit, <<'-X-' ]; #ok | |
d16f50bd | 359 | { printQ() if @Q; |
86a59229 WL |
360 | $CondReg = 0; |
361 | last CYCLE unless getsARGV( $h ); | |
362 | chomp( $h ); | |
363 | $_ .= "\n$h"; | |
364 | } | |
365 | -X- | |
366 | ||
367 | =item [2addr]B<N> | |
368 | ||
369 | Append a newline and the next line of input to the pattern space. If | |
370 | there is no more input, processing is terminated. | |
371 | ||
372 | =cut | |
373 | ||
374 | #-------------------------------------------------------------------------- | |
375 | $ComTab{'p'}=[ 2, '', \&Emit, '{ print $_, "\n"; }' ]; #ok | |
376 | ||
377 | =item [2addr]B<p> | |
378 | ||
379 | Print the pattern space to the standard output. (Use the B<-n> option | |
380 | to suppress automatic printing at the end of a cycle if you want to | |
381 | avoid double printing of lines.) | |
382 | ||
383 | =cut | |
384 | ||
385 | #-------------------------------------------------------------------------- | |
386 | $ComTab{'P'}=[ 2, '', \&Emit, <<'-X-' ]; #ok | |
387 | { if( /^(.*)/ ){ print $1, "\n"; } } | |
388 | -X- | |
389 | ||
390 | =item [2addr]B<P> | |
391 | ||
392 | Prints the pattern space through the first embedded newline or to the end. | |
393 | ||
394 | =cut | |
395 | ||
396 | #-------------------------------------------------------------------------- | |
397 | $ComTab{'q'}=[ 1, '', \&Emit, <<'-X-' ]; #ok | |
398 | { print $_, "\n" if $doPrint; | |
399 | last CYCLE; | |
400 | } | |
401 | -X- | |
402 | ||
403 | =item [1addr]B<q> | |
404 | ||
405 | Branch to the end of the script and quit without starting a new cycle. | |
406 | ||
407 | =cut | |
408 | ||
409 | #-------------------------------------------------------------------------- | |
410 | $ComTab{'r'}=[ 1, 'str', \&Emit, "{ _r( '-X-' ) }" ]; #ok | |
86a59229 WL |
411 | |
412 | =item [1addr]B<r> I<file> | |
413 | ||
414 | Copy the contents of the I<file> to standard output immediately before | |
415 | the next attempt to read a line of input. Any error encountered while | |
416 | reading I<file> is silently ignored. | |
417 | ||
418 | =cut | |
419 | ||
420 | #-------------------------------------------------------------------------- | |
421 | $ComTab{'s'}=[ 2, 'sub', \&Emit, '' ]; #ok | |
422 | ||
423 | =item [2addr]B<s/>I<regular expression>B</>I<replacement>B</>I<flags> | |
424 | ||
425 | Substitute the I<replacement> string for the first substring in | |
426 | the pattern space that matches the I<regular expression>. | |
427 | Any character other than backslash or newline can be used instead of a | |
428 | slash to delimit the regular expression and the replacement. | |
429 | To use the delimiter as a literal character within the regular expression | |
430 | and the replacement, precede the character by a backslash (`C<\>'). | |
431 | ||
432 | Literal newlines may be embedded in the replacement string by | |
433 | preceding a newline with a backslash. | |
434 | ||
435 | Within the replacement, an ampersand (`C<&>') is replaced by the string | |
436 | matching the regular expression. The strings `C<\1>' through `C<\9>' are | |
f7964948 | 437 | replaced by the corresponding subpattern (see L<"BASIC REGULAR EXPRESSIONS">). |
86a59229 WL |
438 | To get a literal `C<&>' or `C<\>' in the replacement text, precede it |
439 | by a backslash. | |
440 | ||
441 | The following I<flags> modify the behaviour of the B<s> command: | |
442 | ||
443 | =over 8 | |
444 | ||
445 | =item B<g> | |
446 | ||
447 | The replacement is performed for all matching, non-overlapping substrings | |
448 | of the pattern space. | |
449 | ||
450 | =item B<1>..B<9> | |
451 | ||
452 | Replace only the n-th matching substring of the pattern space. | |
453 | ||
454 | =item B<p> | |
455 | ||
456 | If the substitution was made, print the new value of the pattern space. | |
457 | ||
458 | =item B<w> I<file> | |
459 | ||
460 | If the substitution was made, write the new value of the pattern space | |
461 | to the specified file. | |
462 | ||
463 | =back | |
464 | ||
465 | =cut | |
466 | ||
467 | #-------------------------------------------------------------------------- | |
468 | $ComTab{'t'}=[ 2, 'str', \&Branch, '{ goto XXX if _t() }' ]; #ok | |
469 | ||
470 | =item [2addr]B<t> [I<label>] | |
471 | ||
472 | Branch to the B<:> function with the specified I<label> if any B<s> | |
473 | substitutions have been made since the most recent reading of an input line | |
474 | or execution of a B<t> function. If no label is given, branch to the end of | |
475 | the script. | |
476 | ||
477 | ||
478 | =cut | |
479 | ||
480 | #-------------------------------------------------------------------------- | |
481 | $ComTab{'w'}=[ 2, 'str', \&Write, "{ _w( '-X-' ) }" ]; #ok | |
482 | ||
483 | =item [2addr]B<w> I<file> | |
484 | ||
485 | The contents of the pattern space are written to the I<file>. | |
486 | ||
487 | =cut | |
488 | ||
489 | #-------------------------------------------------------------------------- | |
490 | $ComTab{'x'}=[ 2, '', \&Emit, '{ ($Hold, $_) = ($_, $Hold) }' ]; #ok | |
491 | ||
492 | =item [2addr]B<x> | |
493 | ||
494 | Swap the contents of the pattern space and the hold space. | |
495 | ||
496 | =cut | |
497 | ||
498 | #-------------------------------------------------------------------------- | |
499 | $ComTab{'y'}=[ 2, 'tra', \&Emit, '' ]; #ok | |
500 | =item [2addr]B<y>B</>I<string1>B</>I<string2>B</> | |
501 | ||
2a467c83 | 502 | In the pattern space, replace all characters occurring in I<string1> by the |
86a59229 WL |
503 | character at the corresponding position in I<string2>. It is possible |
504 | to use any character (other than a backslash or newline) instead of a | |
505 | slash to delimit the strings. Within I<string1> and I<string2>, a | |
506 | backslash followed by any character other than a newline is that literal | |
507 | character, and a backslash followed by an `n' is replaced by a newline | |
508 | character. | |
509 | ||
510 | =cut | |
d83e3bda | 511 | |
86a59229 WL |
512 | #-------------------------------------------------------------------------- |
513 | $ComTab{'='}=[ 1, '', \&Emit, '{ print "$.\n" }' ]; #ok | |
514 | ||
515 | =item [1addr]B<=> | |
516 | ||
517 | Prints the current line number on the standard output. | |
518 | ||
519 | =cut | |
520 | ||
521 | #-------------------------------------------------------------------------- | |
522 | $ComTab{':'}=[ 0, 'str', \&Label, '' ]; #ok | |
523 | ||
524 | =item [0addr]B<:> [I<label>] | |
525 | ||
526 | The command specifies the position of the I<label>. It has no other effect. | |
527 | ||
528 | =cut | |
529 | ||
530 | #-------------------------------------------------------------------------- | |
531 | $ComTab{'{'}=[ 2, '', \&BeginBlock, '{' ]; #ok | |
532 | $ComTab{'}'}=[ 0, '', \&EndBlock, ';}' ]; #ok | |
533 | # ';' to avoid warning on empty {}-block | |
534 | ||
535 | =item [2addr]B<{> [I<command>] | |
536 | ||
537 | =item [0addr]B<}> | |
538 | ||
539 | These two commands begin and end a command list. The first command may | |
540 | be given on the same line as the opening B<{> command. The commands | |
541 | within the list are jointly selected by the address(es) given on the | |
542 | B<{> command (but may still have individual addresses). | |
543 | ||
544 | =cut | |
545 | ||
546 | #-------------------------------------------------------------------------- | |
547 | $ComTab{'#'}=[ 0, 'str', \&Comment, '' ]; #ok | |
548 | ||
549 | =item [0addr]B<#> [I<comment>] | |
550 | ||
551 | The entire line is ignored (treated as a comment). If, however, the first | |
552 | two characters in the script are `C<#n>', automatic printing of output is | |
553 | suppressed, as if the B<-n> option were given on the command line. | |
554 | ||
555 | =back | |
556 | ||
557 | =cut | |
558 | ||
559 | use vars qw{ $isEOF $Hold %wFiles @Q $CondReg $doPrint }; | |
560 | ||
561 | my $useDEBUG = exists( $ENV{PSEDDEBUG} ); | |
562 | my $useEXTBRE = $ENV{PSEDEXTBRE} || ''; | |
563 | $useEXTBRE =~ s/[^<>wWyB]//g; # gawk RE's handle these | |
564 | ||
565 | my $doAutoPrint = 1; # automatic printing of pattern space (-n => 0) | |
566 | my $doOpenWrite = 1; # open w command output files at start (-a => 0) | |
567 | my $svOpenWrite = 0; # save $doOpenWrite | |
96021e87 JM |
568 | |
569 | # lower case $0 below as a VMSism. The VMS build procedure creates the | |
570 | # s2p file traditionally in upper case on the disk. When VMS is in a | |
571 | # case preserved or case sensitive mode, $0 will be returned in the exact | |
572 | # case which will be on the disk, and that is not predictable at this time. | |
573 | ||
574 | my $doGenerate = lc($0) eq 's2p'; | |
86a59229 WL |
575 | |
576 | # Collected and compiled script | |
577 | # | |
d16f50bd WL |
578 | my( @Commands, %Defined, @BlockStack, %Label, $labNum, $Code, $Func ); |
579 | $Code = ''; | |
86a59229 WL |
580 | |
581 | ################## | |
582 | # Compile Time | |
583 | # | |
584 | # Labels | |
585 | # | |
586 | # Error handling | |
587 | # | |
588 | sub Warn($;$){ | |
589 | my( $msg, $loc ) = @_; | |
590 | $loc ||= ''; | |
591 | $loc .= ': ' if length( $loc ); | |
592 | warn( "$0: $loc$msg\n" ); | |
593 | } | |
594 | ||
595 | $labNum = 0; | |
596 | sub newLabel(){ | |
597 | return 'L_'.++$labNum; | |
598 | } | |
599 | ||
600 | # safeHere: create safe here delimiter and modify opcode and argument | |
601 | # | |
602 | sub safeHere($$){ | |
603 | my( $codref, $argref ) = @_; | |
604 | my $eod = 'EOD000'; | |
605 | while( $$argref =~ /^$eod$/m ){ | |
606 | $eod++; | |
607 | } | |
608 | $$codref =~ s/TheEnd/$eod/e; | |
609 | $$argref .= "$eod\n"; | |
610 | } | |
611 | ||
612 | # Emit: create address logic and emit command | |
613 | # | |
614 | sub Emit($$$$$$){ | |
615 | my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_; | |
616 | my $cond = ''; | |
617 | if( defined( $addr1 ) ){ | |
618 | if( defined( $addr2 ) ){ | |
619 | $addr1 .= $addr2 =~ /^\d+$/ ? "..$addr2" : "...$addr2"; | |
620 | } else { | |
621 | $addr1 .= ' == $.' if $addr1 =~ /^\d+$/; | |
622 | } | |
623 | $cond = $negated ? "unless( $addr1 )\n" : "if( $addr1 )\n"; | |
624 | } | |
625 | ||
626 | if( $opcode eq '' ){ | |
627 | $Code .= "$cond$arg\n"; | |
628 | ||
629 | } elsif( $opcode =~ s/-X-/$arg/e ){ | |
630 | $Code .= "$cond$opcode\n"; | |
631 | ||
632 | } elsif( $opcode =~ /TheEnd/ ){ | |
633 | safeHere( \$opcode, \$arg ); | |
634 | $Code .= "$cond$opcode$arg"; | |
635 | ||
636 | } else { | |
637 | $Code .= "$cond$opcode\n"; | |
638 | } | |
639 | 0; | |
640 | } | |
641 | ||
642 | # Write (w command, w flag): store pathname | |
643 | # | |
644 | sub Write($$$$$$){ | |
645 | my( $addr1, $addr2, $negated, $opcode, $path, $fl ) = @_; | |
646 | $wFiles{$path} = ''; | |
647 | Emit( $addr1, $addr2, $negated, $opcode, $path, $fl ); | |
648 | } | |
649 | ||
650 | ||
651 | # Label (: command): label definition | |
652 | # | |
653 | sub Label($$$$$$){ | |
654 | my( $addr1, $addr2, $negated, $opcode, $lab, $fl ) = @_; | |
655 | my $rc = 0; | |
656 | $lab =~ s/\s+//; | |
657 | if( length( $lab ) ){ | |
658 | my $h; | |
659 | if( ! exists( $Label{$lab} ) ){ | |
660 | $h = $Label{$lab}{name} = newLabel(); | |
661 | } else { | |
662 | $h = $Label{$lab}{name}; | |
663 | if( exists( $Label{$lab}{defined} ) ){ | |
664 | my $dl = $Label{$lab}{defined}; | |
665 | Warn( "duplicate label $lab (first defined at $dl)", $fl ); | |
666 | $rc = 1; | |
667 | } | |
668 | } | |
669 | $Label{$lab}{defined} = $fl; | |
670 | $Code .= "$h:;\n"; | |
671 | } | |
672 | $rc; | |
673 | } | |
674 | ||
675 | # BeginBlock ({ command): push block start | |
676 | # | |
677 | sub BeginBlock($$$$$$){ | |
678 | my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_; | |
679 | push( @BlockStack, [ $fl, $addr1, $addr2, $negated ] ); | |
680 | Emit( $addr1, $addr2, $negated, $opcode, $arg, $fl ); | |
681 | } | |
682 | ||
683 | # EndBlock (} command): check proper nesting | |
684 | # | |
685 | sub EndBlock($$$$$$){ | |
686 | my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_; | |
687 | my $rc; | |
688 | my $jcom = pop( @BlockStack ); | |
689 | if( defined( $jcom ) ){ | |
690 | $rc = Emit( $addr1, $addr2, $negated, $opcode, $arg, $fl ); | |
691 | } else { | |
692 | Warn( "unexpected `}'", $fl ); | |
693 | $rc = 1; | |
694 | } | |
695 | $rc; | |
696 | } | |
697 | ||
698 | # Branch (t, b commands): check or create label, substitute default | |
699 | # | |
700 | sub Branch($$$$$$){ | |
701 | my( $addr1, $addr2, $negated, $opcode, $lab, $fl ) = @_; | |
702 | $lab =~ s/\s+//; # no spaces at end | |
703 | my $h; | |
704 | if( length( $lab ) ){ | |
705 | if( ! exists( $Label{$lab} ) ){ | |
706 | $h = $Label{$lab}{name} = newLabel(); | |
707 | } else { | |
708 | $h = $Label{$lab}{name}; | |
709 | } | |
710 | push( @{$Label{$lab}{used}}, $fl ); | |
711 | } else { | |
712 | $h = 'EOS'; | |
713 | } | |
714 | $opcode =~ s/XXX/$h/e; | |
715 | Emit( $addr1, $addr2, $negated, $opcode, '', $fl ); | |
716 | } | |
717 | ||
718 | # Change (c command): is special due to range end watching | |
719 | # | |
720 | sub Change($$$$$$){ | |
721 | my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_; | |
722 | my $kwd = $negated ? 'unless' : 'if'; | |
723 | if( defined( $addr2 ) ){ | |
724 | $addr1 .= $addr2 =~ /^\d+$/ ? "..$addr2" : "...$addr2"; | |
725 | if( ! $negated ){ | |
726 | $addr1 = '$icnt = ('.$addr1.')'; | |
727 | $opcode = 'if( $icnt =~ /E0$/ )' . $opcode; | |
728 | } | |
729 | } else { | |
730 | $addr1 .= ' == $.' if $addr1 =~ /^\d+$/; | |
731 | } | |
732 | safeHere( \$opcode, \$arg ); | |
733 | $Code .= "$kwd( $addr1 ){\n $opcode$arg}\n"; | |
734 | 0; | |
735 | } | |
736 | ||
737 | ||
738 | # Comment (# command): A no-op. Who would've thought that! | |
739 | # | |
740 | sub Comment($$$$$$){ | |
741 | my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_; | |
742 | ### $Code .= "# $arg\n"; | |
743 | 0; | |
744 | } | |
745 | ||
e2f73067 WL |
746 | # stripRegex from the current command. If we're in the first |
747 | # part of s///, trailing spaces have to be kept as the initial | |
748 | # part of the replacement string. | |
749 | # | |
b588327e | 750 | sub stripRegex($$;$){ |
e2f73067 | 751 | my( $del, $sref, $sub ) = @_; |
86a59229 WL |
752 | my $regex = $del; |
753 | print "stripRegex:$del:$$sref:\n" if $useDEBUG; | |
754 | while( $$sref =~ s{^(.*?)(\\*)\Q$del\E(\s*)}{}s ){ | |
755 | my $sl = $2; | |
756 | $regex .= $1.$sl.$del; | |
757 | if( length( $sl ) % 2 == 0 ){ | |
e2f73067 WL |
758 | if( $sub && (length( $3 ) > 0) ){ |
759 | $$sref = $3 . $$sref; | |
760 | } | |
86a59229 WL |
761 | return $regex; |
762 | } | |
763 | $regex .= $3; | |
764 | } | |
765 | undef(); | |
766 | } | |
767 | ||
768 | # stripTrans: take a <del> terminated string from y command | |
769 | # honoring and cleaning up of \-escaped <del>'s | |
770 | # | |
771 | sub stripTrans($$){ | |
772 | my( $del, $sref ) = @_; | |
773 | my $t = ''; | |
774 | print "stripTrans:$del:$$sref:\n" if $useDEBUG; | |
775 | while( $$sref =~ s{^(.*?)(\\*)\Q$del\E}{}s ){ | |
776 | my $sl = $2; | |
777 | $t .= $1; | |
778 | if( length( $sl ) % 2 == 0 ){ | |
779 | $t .= $sl; | |
780 | $t =~ s/\\\\/\\/g; | |
781 | return $t; | |
782 | } | |
783 | chop( $sl ); | |
784 | $t .= $sl.$del.$3; | |
785 | } | |
786 | undef(); | |
787 | } | |
788 | ||
789 | # makey - construct Perl y/// from sed y/// | |
790 | # | |
791 | sub makey($$$){ | |
792 | my( $fr, $to, $fl ) = @_; | |
793 | my $error = 0; | |
794 | ||
795 | # Ensure that any '-' is up front. | |
796 | # Diagnose duplicate contradicting mappings | |
797 | my %tr; | |
798 | for( my $i = 0; $i < length($fr); $i++ ){ | |
799 | my $fc = substr($fr,$i,1); | |
800 | my $tc = substr($to,$i,1); | |
801 | if( exists( $tr{$fc} ) && $tr{$fc} ne $tc ){ | |
3484938b | 802 | Warn( "ambiguous translation for character `$fc' in `y' command", |
86a59229 WL |
803 | $fl ); |
804 | $error++; | |
805 | } | |
806 | $tr{$fc} = $tc; | |
807 | } | |
808 | $fr = $to = ''; | |
809 | if( exists( $tr{'-'} ) ){ | |
810 | ( $fr, $to ) = ( '-', $tr{'-'} ); | |
811 | delete( $tr{'-'} ); | |
812 | } else { | |
813 | $fr = $to = ''; | |
814 | } | |
815 | # might just as well sort it... | |
816 | for my $fc ( sort keys( %tr ) ){ | |
817 | $fr .= $fc; | |
818 | $to .= $tr{$fc}; | |
819 | } | |
820 | # make embedded delimiters and newlines safe | |
821 | $fr =~ s/([{}])/\$1/g; | |
822 | $to =~ s/([{}])/\$1/g; | |
823 | $fr =~ s/\n/\\n/g; | |
824 | $to =~ s/\n/\\n/g; | |
825 | return $error ? undef() : "{ y{$fr}{$to}; }"; | |
826 | } | |
827 | ||
828 | ###### | |
829 | # makes - construct Perl s/// from sed s/// | |
830 | # | |
831 | sub makes($$$$$$$){ | |
832 | my( $regex, $subst, $path, $global, $print, $nmatch, $fl ) = @_; | |
833 | ||
834 | # make embedded newlines safe | |
835 | $regex =~ s/\n/\\n/g; | |
836 | $subst =~ s/\n/\\n/g; | |
837 | ||
838 | my $code; | |
839 | # n-th occurrence | |
840 | # | |
841 | if( length( $nmatch ) ){ | |
842 | $code = <<TheEnd; | |
843 | { \$n = $nmatch; | |
844 | while( --\$n && ( \$s = m ${regex}g ) ){} | |
845 | \$s = ( substr( \$_, pos() ) =~ s ${regex}${subst}s ) if \$s; | |
846 | \$CondReg ||= \$s; | |
847 | TheEnd | |
848 | } else { | |
849 | $code = <<TheEnd; | |
850 | { \$s = s ${regex}${subst}s${global}; | |
851 | \$CondReg ||= \$s; | |
852 | TheEnd | |
853 | } | |
854 | if( $print ){ | |
855 | $code .= ' print $_, "\n" if $s;'."\n"; | |
856 | } | |
857 | if( defined( $path ) ){ | |
858 | $wFiles{$path} = ''; | |
859 | $code .= " _w( '$path' ) if \$s;\n"; | |
d16f50bd | 860 | $GenKey{'w'} = 1; |
86a59229 WL |
861 | } |
862 | $code .= "}"; | |
863 | } | |
864 | ||
865 | =head1 BASIC REGULAR EXPRESSIONS | |
866 | ||
867 | A I<Basic Regular Expression> (BRE), as defined in POSIX 1003.2, consists | |
868 | of I<atoms>, for matching parts of a string, and I<bounds>, specifying | |
869 | repetitions of a preceding atom. | |
870 | ||
871 | =head2 Atoms | |
872 | ||
873 | The possible atoms of a BRE are: B<.>, matching any single character; | |
874 | B<^> and B<$>, matching the null string at the beginning or end | |
875 | of a string, respectively; a I<bracket expressions>, enclosed | |
876 | in B<[> and B<]> (see below); and any single character with no | |
877 | other significance (matching that character). A B<\> before one | |
878 | of: B<.>, B<^>, B<$>, B<[>, B<*>, B<\>, matching the character | |
879 | after the backslash. A sequence of atoms enclosed in B<\(> and B<\)> | |
880 | becomes an atom and establishes the target for a I<backreference>, | |
881 | consisting of the substring that actually matches the enclosed atoms. | |
882 | Finally, B<\> followed by one of the digits B<0> through B<9> is a | |
883 | backreference. | |
884 | ||
885 | A B<^> that is not first, or a B<$> that is not last does not have | |
886 | a special significance and need not be preceded by a backslash to | |
887 | become literal. The same is true for a B<]>, that does not terminate | |
888 | a bracket expression. | |
889 | ||
890 | An unescaped backslash cannot be last in a BRE. | |
891 | ||
892 | =head2 Bounds | |
893 | ||
894 | The BRE bounds are: B<*>, specifying 0 or more matches of the preceding | |
895 | atom; B<\{>I<count>B<\}>, specifying that many repetitions; | |
896 | B<\{>I<minimum>B<,\}>, giving a lower limit; and | |
897 | B<\{>I<minimum>B<,>I<maximum>B<\}> finally defines a lower and upper | |
898 | bound. | |
899 | ||
900 | A bound appearing as the first item in a BRE is taken literally. | |
901 | ||
902 | =head2 Bracket Expressions | |
903 | ||
904 | A I<bracket expression> is a list of characters, character ranges | |
905 | and character classes enclosed in B<[> and B<]> and matches any | |
906 | single character from the represented set of characters. | |
907 | ||
908 | A character range is written as two characters separated by B<-> and | |
909 | represents all characters (according to the character collating sequence) | |
910 | that are not less than the first and not greater than the second. | |
911 | (Ranges are very collating-sequence-dependent, and portable programs | |
912 | should avoid relying on them.) | |
913 | ||
914 | A character class is one of the class names | |
915 | ||
916 | alnum digit punct | |
917 | alpha graph space | |
918 | blank lower upper | |
919 | cntrl print xdigit | |
920 | ||
921 | enclosed in B<[:> and B<:]> and represents the set of characters | |
922 | as defined in ctype(3). | |
923 | ||
924 | If the first character after B<[> is B<^>, the sense of matching is | |
925 | inverted. | |
926 | ||
927 | To include a literal `C<^>', place it anywhere else but first. To | |
928 | include a literal 'C<]>' place it first or immediately after an | |
929 | initial B<^>. To include a literal `C<->' make it the first (or | |
930 | second after B<^>) or last character, or the second endpoint of | |
931 | a range. | |
932 | ||
933 | The special bracket expression constructs C<[[:E<lt>:]]> and C<[[:E<gt>:]]> | |
934 | match the null string at the beginning and end of a word respectively. | |
935 | (Note that neither is identical to Perl's `\b' atom.) | |
936 | ||
937 | =head2 Additional Atoms | |
938 | ||
939 | Since some sed implementations provide additional regular expression | |
940 | atoms (not defined in POSIX 1003.2), B<psed> is capable of translating | |
941 | the following backslash escapes: | |
942 | ||
943 | =over 4 | |
944 | ||
945 | =item B<\E<lt>> This is the same as C<[[:E<gt>:]]>. | |
946 | ||
947 | =item B<\E<gt>> This is the same as C<[[:E<lt>:]]>. | |
948 | ||
949 | =item B<\w> This is an abbreviation for C<[[:alnum:]_]>. | |
950 | ||
951 | =item B<\W> This is an abbreviation for C<[^[:alnum:]_]>. | |
952 | ||
953 | =item B<\y> Match the empty string at a word boundary. | |
954 | ||
955 | =item B<\B> Match the empty string between any two either word or non-word characters. | |
956 | ||
957 | =back | |
958 | ||
959 | To enable this feature, the environment variable PSEDEXTBRE must be set | |
960 | to a string containing the requested characters, e.g.: | |
961 | C<PSEDEXTBRE='E<lt>E<gt>wW'>. | |
962 | ||
963 | =cut | |
964 | ||
965 | ##### | |
966 | # bre2p - convert BRE to Perl RE | |
967 | # | |
968 | sub peek(\$$){ | |
969 | my( $pref, $ic ) = @_; | |
970 | $ic < length($$pref)-1 ? substr( $$pref, $ic+1, 1 ) : ''; | |
971 | } | |
972 | ||
973 | sub bre2p($$$){ | |
974 | my( $del, $pat, $fl ) = @_; | |
975 | my $led = $del; | |
976 | $led =~ tr/{([</})]>/; | |
977 | $led = '' if $led eq $del; | |
978 | ||
979 | $pat = substr( $pat, 1, length($pat) - 2 ); | |
980 | my $res = ''; | |
981 | my $bracklev = 0; | |
982 | my $backref = 0; | |
983 | my $parlev = 0; | |
984 | for( my $ic = 0; $ic < length( $pat ); $ic++ ){ | |
985 | my $c = substr( $pat, $ic, 1 ); | |
986 | if( $c eq '\\' ){ | |
987 | ### backslash escapes | |
988 | my $nc = peek($pat,$ic); | |
989 | if( $nc eq '' ){ | |
990 | Warn( "`\\' cannot be last in pattern", $fl ); | |
991 | return undef(); | |
992 | } | |
993 | $ic++; | |
994 | if( $nc eq $del ){ ## \<pattern del> => \<pattern del> | |
995 | $res .= "\\$del"; | |
996 | ||
997 | } elsif( $nc =~ /([[.*\\n])/ ){ | |
998 | ## check for \-escaped magics and \n: | |
999 | ## \[ \. \* \\ \n stay as they are | |
1000 | $res .= '\\'.$nc; | |
1001 | ||
1002 | } elsif( $nc eq '(' ){ ## \( => ( | |
1003 | $parlev++; | |
1004 | $res .= '('; | |
1005 | ||
1006 | } elsif( $nc eq ')' ){ ## \) => ) | |
1007 | $parlev--; | |
1008 | $backref++; | |
1009 | if( $parlev < 0 ){ | |
1010 | Warn( "unmatched `\\)'", $fl ); | |
1011 | return undef(); | |
1012 | } | |
1013 | $res .= ')'; | |
1014 | ||
1015 | } elsif( $nc eq '{' ){ ## repetition factor \{<i>[,[<j>]]\} | |
1016 | my $endpos = index( $pat, '\\}', $ic ); | |
1017 | if( $endpos < 0 ){ | |
1018 | Warn( "unmatched `\\{'", $fl ); | |
1019 | return undef(); | |
1020 | } | |
1021 | my $rep = substr( $pat, $ic+1, $endpos-($ic+1) ); | |
1022 | $ic = $endpos + 1; | |
1023 | ||
1024 | if( $res =~ /^\^?$/ ){ | |
1025 | $res .= "\\{$rep\}"; | |
1026 | } elsif( $rep =~ /^(\d+)(,?)(\d*)?$/ ){ | |
1027 | my $min = $1; | |
1028 | my $com = $2 || ''; | |
1029 | my $max = $3; | |
1030 | if( length( $max ) ){ | |
1031 | if( $max < $min ){ | |
1032 | Warn( "maximum less than minimum in `\\{$rep\\}'", | |
1033 | $fl ); | |
1034 | return undef(); | |
1035 | } | |
1036 | } else { | |
1037 | $max = ''; | |
1038 | } | |
1039 | # simplify some | |
1040 | if( $min == 0 && $max eq '1' ){ | |
1041 | $res .= '?'; | |
1042 | } elsif( $min == 1 && "$com$max" eq ',' ){ | |
1043 | $res .= '+'; | |
1044 | } elsif( $min == 0 && "$com$max" eq ',' ){ | |
1045 | $res .= '*'; | |
1046 | } else { | |
1047 | $res .= "{$min$com$max}"; | |
1048 | } | |
1049 | } else { | |
1050 | Warn( "invalid repeat clause `\\{$rep\\}'", $fl ); | |
1051 | return undef(); | |
1052 | } | |
1053 | ||
1054 | } elsif( $nc =~ /^[1-9]$/ ){ | |
1055 | ## \1 .. \9 => \1 .. \9, but check for a following digit | |
1056 | if( $nc > $backref ){ | |
1057 | Warn( "invalid backreference ($nc)", $fl ); | |
1058 | return undef(); | |
1059 | } | |
1060 | $res .= "\\$nc"; | |
1061 | if( peek($pat,$ic) =~ /[0-9]/ ){ | |
1062 | $res .= '(?:)'; | |
1063 | } | |
1064 | ||
1065 | } elsif( $useEXTBRE && ( $nc =~ /[$useEXTBRE]/ ) ){ | |
1066 | ## extensions - at most <>wWyB - not in POSIX | |
1067 | if( $nc eq '<' ){ ## \< => \b(?=\w), be precise | |
1068 | $res .= '\\b(?<=\\W)'; | |
1069 | } elsif( $nc eq '>' ){ ## \> => \b(?=\W), be precise | |
1070 | $res .= '\\b(?=\\W)'; | |
1071 | } elsif( $nc eq 'y' ){ ## \y => \b | |
1072 | $res .= '\\b'; | |
1073 | } else { ## \B, \w, \W remain the same | |
1074 | $res .= "\\$nc"; | |
1075 | } | |
1076 | } elsif( $nc eq $led ){ | |
1077 | ## \<closing bracketing-delimiter> - keep '\' | |
1078 | $res .= "\\$nc"; | |
1079 | ||
1080 | } else { ## \ <char> => <char> ("as if `\' were not present") | |
1081 | $res .= $nc; | |
1082 | } | |
1083 | ||
1084 | } elsif( $c eq '.' ){ ## . => . | |
1085 | $res .= $c; | |
1086 | ||
1087 | } elsif( $c eq '*' ){ ## * => * but \* if there's nothing preceding it | |
1088 | if( $res =~ /^\^?$/ ){ | |
1089 | $res .= '\\*'; | |
1090 | } elsif( substr( $res, -1, 1 ) ne '*' ){ | |
1091 | $res .= $c; | |
1092 | } | |
1093 | ||
1094 | } elsif( $c eq '[' ){ | |
1095 | ## parse []: [^...] [^]...] [-...] | |
1096 | my $add = '['; | |
1097 | if( peek($pat,$ic) eq '^' ){ | |
1098 | $ic++; | |
1099 | $add .= '^'; | |
1100 | } | |
1101 | my $nc = peek($pat,$ic); | |
1102 | if( $nc eq ']' || $nc eq '-' ){ | |
1103 | $add .= $nc; | |
1104 | $ic++; | |
1105 | } | |
1106 | # check that [ is not trailing | |
1107 | if( $ic >= length( $pat ) - 1 ){ | |
1108 | Warn( "unmatched `['", $fl ); | |
1109 | return undef(); | |
1110 | } | |
1111 | # look for [:...:] and x-y | |
1112 | my $rstr = substr( $pat, $ic+1 ); | |
1113 | if( $rstr =~ /^((?:\[:\(\w+|[><]\):\]|[^]-](?:-[^]])?)*)/ ){ | |
1114 | my $cnt = $1; | |
1115 | $ic += length( $cnt ); | |
1116 | $cnt =~ s/([\\\$])/\\$1/g; # `\', `$' are magic in Perl [] | |
1117 | # try some simplifications | |
1118 | my $red = $cnt; | |
1119 | if( $red =~ s/0-9// ){ | |
1120 | $cnt = $red.'\d'; | |
1121 | if( $red =~ s/A-Z// && $red =~ s/a-z// && $red =~ s/_// ){ | |
1122 | $cnt = $red.'\w'; | |
1123 | } | |
1124 | } | |
1125 | $add .= $cnt; | |
1126 | ||
1127 | # POSIX 1003.2 has this (optional) for begin/end word | |
1128 | $add = '\\b(?=\\W)' if $add eq '[[:<:]]'; | |
1129 | $add = '\\b(?<=\\W)' if $add eq '[[:>:]]'; | |
1130 | ||
1131 | } | |
1132 | ||
1133 | ## may have a trailing `-' before `]' | |
1134 | if( $ic < length($pat) - 1 && | |
1135 | substr( $pat, $ic+1 ) =~ /^(-?])/ ){ | |
1136 | $ic += length( $1 ); | |
1137 | $add .= $1; | |
1138 | # another simplification | |
1139 | $add =~ s/^\[(\^?)(\\[dw])]$/ $1 eq '^' ? uc($2) : $2 /e; | |
1140 | $res .= $add; | |
1141 | } else { | |
1142 | Warn( "unmatched `['", $fl ); | |
1143 | return undef(); | |
1144 | } | |
3cb6de81 | 1145 | |
86a59229 WL |
1146 | } elsif( $c eq $led ){ ## unescaped <closing bracketing-delimiter> |
1147 | $res .= "\\$c"; | |
d83e3bda | 1148 | |
86a59229 WL |
1149 | } elsif( $c eq ']' ){ ## unmatched ] is not magic |
1150 | $res .= ']'; | |
d83e3bda | 1151 | |
86a59229 WL |
1152 | } elsif( $c =~ /[|+?{}()]/ ){ ## not magic in BRE, but in Perl: \-quote |
1153 | $res .= "\\$c"; | |
d83e3bda | 1154 | |
86a59229 WL |
1155 | } elsif( $c eq '^' ){ ## not magic unless 1st, but in Perl: \-quote |
1156 | $res .= length( $res ) ? '\\^' : '^'; | |
d83e3bda | 1157 | |
86a59229 WL |
1158 | } elsif( $c eq '$' ){ ## not magic unless last, but in Perl: \-quote |
1159 | $res .= $ic == length( $pat ) - 1 ? '$' : '\\$'; | |
8d063cd8 | 1160 | |
86a59229 WL |
1161 | } else { |
1162 | $res .= $c; | |
1163 | } | |
8d063cd8 | 1164 | } |
0a12ae7d | 1165 | |
86a59229 WL |
1166 | if( $parlev ){ |
1167 | Warn( "unmatched `\\('", $fl ); | |
1168 | return undef(); | |
8d063cd8 | 1169 | } |
0a12ae7d | 1170 | |
86a59229 WL |
1171 | # final cleanup: eliminate raw HTs |
1172 | $res =~ s/\t/\\t/g; | |
1173 | return $del . $res . ( $led ? $led : $del ); | |
1174 | } | |
0a12ae7d | 1175 | |
86a59229 WL |
1176 | |
1177 | ##### | |
1178 | # sub2p - convert sed substitution to Perl substitution | |
1179 | # | |
1180 | sub sub2p($$$){ | |
1181 | my( $del, $subst, $fl ) = @_; | |
1182 | my $led = $del; | |
1183 | $led =~ tr/{([</})]>/; | |
1184 | $led = '' if $led eq $del; | |
1185 | ||
1186 | $subst = substr( $subst, 1, length($subst) - 2 ); | |
1187 | my $res = ''; | |
1188 | ||
1189 | for( my $ic = 0; $ic < length( $subst ); $ic++ ){ | |
1190 | my $c = substr( $subst, $ic, 1 ); | |
1191 | if( $c eq '\\' ){ | |
1192 | ### backslash escapes | |
1193 | my $nc = peek($subst,$ic); | |
1194 | if( $nc eq '' ){ | |
1195 | Warn( "`\\' cannot be last in substitution", $fl ); | |
1196 | return undef(); | |
1197 | } | |
1198 | $ic++; | |
1199 | if( $nc =~ /[\\$del$led]/ ){ ## \ and delimiter | |
1200 | $res .= '\\' . $nc; | |
1201 | } elsif( $nc =~ /[1-9]/ ){ ## \1 - \9 => ${1} - ${9} | |
1202 | $res .= '${' . $nc . '}'; | |
1203 | } else { ## everything else (includes &): omit \ | |
1204 | $res .= $nc; | |
1205 | } | |
1206 | } elsif( $c eq '&' ){ ## & => $& | |
1207 | $res .= '$&'; | |
1208 | } elsif( $c =~ /[\$\@$led]/ ){ ## magic in Perl's substitution string | |
1209 | $res .= '\\' . $c; | |
1210 | } else { | |
1211 | $res .= $c; | |
8d063cd8 | 1212 | } |
8d063cd8 LW |
1213 | } |
1214 | ||
86a59229 WL |
1215 | # final cleanup: eliminate raw HTs |
1216 | $res =~ s/\t/\\t/g; | |
1217 | return ( $led ? $del : $led ) . $res . ( $led ? $led : $del ); | |
1218 | } | |
0a12ae7d | 1219 | |
86a59229 WL |
1220 | |
1221 | sub Parse(){ | |
1222 | my $error = 0; | |
1223 | my( $pdef, $pfil, $plin ); | |
1224 | for( my $icom = 0; $icom < @Commands; $icom++ ){ | |
1225 | my $cmd = $Commands[$icom]; | |
1226 | print "Parse:$cmd:\n" if $useDEBUG; | |
1227 | $cmd =~ s/^\s+//; | |
1228 | next unless length( $cmd ); | |
1229 | my $scom = $icom; | |
1230 | if( exists( $Defined{$icom} ) ){ | |
1231 | $pdef = $Defined{$icom}; | |
1232 | if( $pdef =~ /^ #(\d+)/ ){ | |
1233 | $pfil = 'expression #'; | |
1234 | $plin = $1; | |
1235 | } else { | |
1236 | $pfil = "$pdef l."; | |
1237 | $plin = 1; | |
1238 | } | |
1239 | } else { | |
1240 | $plin++; | |
1241 | } | |
1242 | my $fl = "$pfil$plin"; | |
1243 | ||
1244 | # insert command as comment in gnerated code | |
1245 | # | |
1246 | $Code .= "# $cmd\n" if $doGenerate; | |
1247 | ||
1248 | # The Address(es) | |
1249 | # | |
1250 | my( $negated, $naddr, $addr1, $addr2 ); | |
1251 | $naddr = 0; | |
1252 | if( $cmd =~ s/^(\d+)\s*// ){ | |
1253 | $addr1 = "$1"; $naddr++; | |
1254 | } elsif( $cmd =~ s/^\$\s*// ){ | |
1255 | $addr1 = 'eofARGV()'; $naddr++; | |
1256 | } elsif( $cmd =~ s{^(/)}{} || $cmd =~ s{^\\(.)}{} ){ | |
1257 | my $del = $1; | |
1258 | my $regex = stripRegex( $del, \$cmd ); | |
1259 | if( defined( $regex ) ){ | |
1260 | $addr1 = 'm '.bre2p( $del, $regex, $fl ).'s'; | |
1261 | $naddr++; | |
1262 | } else { | |
1263 | Warn( "malformed regex, 1st address", $fl ); | |
1264 | $error++; | |
1265 | next; | |
1266 | } | |
1267 | } | |
1268 | if( defined( $addr1 ) && $cmd =~ s/,\s*// ){ | |
1269 | if( $cmd =~ s/^(\d+)\s*// ){ | |
1270 | $addr2 = "$1"; $naddr++; | |
1271 | } elsif( $cmd =~ s/^\$\s*// ){ | |
1272 | $addr2 = 'eofARGV()'; $naddr++; | |
1273 | } elsif( $cmd =~ s{^(/)}{} || $cmd =~ s{^\\(.)}{} ){ | |
1274 | my $del = $1; | |
1275 | my $regex = stripRegex( $del, \$cmd ); | |
1276 | if( defined( $regex ) ){ | |
1277 | $addr2 = 'm '. bre2p( $del, $regex, $fl ).'s'; | |
1278 | $naddr++; | |
1279 | } else { | |
1280 | Warn( "malformed regex, 2nd address", $fl ); | |
1281 | $error++; | |
1282 | next; | |
1283 | } | |
1284 | } else { | |
1285 | Warn( "invalid address after `,'", $fl ); | |
1286 | $error++; | |
1287 | next; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | # address modifier `!' | |
1292 | # | |
1293 | $negated = $cmd =~ s/^!\s*//; | |
1294 | if( defined( $addr1 ) ){ | |
1295 | print "Parse: addr1=$addr1" if $useDEBUG; | |
1296 | if( defined( $addr2 ) ){ | |
1297 | print ", addr2=$addr2 " if $useDEBUG; | |
1298 | # both numeric and addr1 > addr2 => eliminate addr2 | |
1299 | undef( $addr2 ) if $addr1 =~ /^\d+$/ && | |
1300 | $addr2 =~ /^\d+$/ && $addr1 > $addr2; | |
1301 | } | |
9ef589d8 | 1302 | } |
86a59229 WL |
1303 | print 'negated' if $useDEBUG && $negated; |
1304 | print " command:$cmd\n" if $useDEBUG; | |
1305 | ||
1306 | # The Command | |
1307 | # | |
1308 | if( $cmd !~ s/^([:#={}abcdDgGhHilnNpPqrstwxy])\s*// ){ | |
1309 | my $h = substr( $cmd, 0, 1 ); | |
1310 | Warn( "unknown command `$h'", $fl ); | |
1311 | $error++; | |
8d063cd8 LW |
1312 | next; |
1313 | } | |
86a59229 | 1314 | my $key = $1; |
8d063cd8 | 1315 | |
86a59229 | 1316 | my $tabref = $ComTab{$key}; |
d16f50bd | 1317 | $GenKey{$key} = 1; |
86a59229 WL |
1318 | if( $naddr > $tabref->[0] ){ |
1319 | Warn( "excess address(es)", $fl ); | |
1320 | $error++; | |
8d063cd8 LW |
1321 | next; |
1322 | } | |
1323 | ||
86a59229 WL |
1324 | my $arg = ''; |
1325 | if( $tabref->[1] eq 'str' ){ | |
1326 | # take remainder - don't care if it is empty | |
1327 | $arg = $cmd; | |
1328 | $cmd = ''; | |
1329 | ||
1330 | } elsif( $tabref->[1] eq 'txt' ){ | |
1331 | # multi-line text | |
1332 | my $goon = $cmd =~ /(.*)\\$/; | |
1333 | if( length( $1 ) ){ | |
1334 | Warn( "extra characters after command ($cmd)", $fl ); | |
1335 | $error++; | |
8d063cd8 | 1336 | } |
86a59229 WL |
1337 | while( $goon ){ |
1338 | $icom++; | |
1339 | if( $icom > $#Commands ){ | |
1340 | Warn( "unexpected end of script", $fl ); | |
1341 | $error++; | |
1342 | last; | |
1343 | } | |
1344 | $cmd = $Commands[$icom]; | |
1345 | $Code .= "# $cmd\n" if $doGenerate; | |
1346 | $goon = $cmd =~ s/\\$//; | |
1347 | $cmd =~ s/\\(.)/$1/g; | |
1348 | $arg .= "\n" if length( $arg ); | |
1349 | $arg .= $cmd; | |
8d063cd8 | 1350 | } |
86a59229 WL |
1351 | $arg .= "\n" if length( $arg ); |
1352 | $cmd = ''; | |
8d063cd8 | 1353 | |
86a59229 WL |
1354 | } elsif( $tabref->[1] eq 'sub' ){ |
1355 | # s/// | |
1356 | if( ! length( $cmd ) ){ | |
1357 | Warn( "`s' command requires argument", $fl ); | |
1358 | $error++; | |
1359 | next; | |
1360 | } | |
1361 | if( $cmd =~ s{^([^\\\n])}{} ){ | |
1362 | my $del = $1; | |
e2f73067 | 1363 | my $regex = stripRegex( $del, \$cmd, "s" ); |
86a59229 WL |
1364 | if( ! defined( $regex ) ){ |
1365 | Warn( "malformed regular expression", $fl ); | |
1366 | $error++; | |
1367 | next; | |
a687059c | 1368 | } |
86a59229 WL |
1369 | $regex = bre2p( $del, $regex, $fl ); |
1370 | ||
1371 | # a trailing \ indicates embedded NL (in replacement string) | |
1372 | while( $cmd =~ s/(?<!\\)\\$/\n/ ){ | |
1373 | $icom++; | |
1374 | if( $icom > $#Commands ){ | |
1375 | Warn( "unexpected end of script", $fl ); | |
1376 | $error++; | |
1377 | last; | |
8d063cd8 | 1378 | } |
86a59229 WL |
1379 | $cmd .= $Commands[$icom]; |
1380 | $Code .= "# $Commands[$icom]\n" if $doGenerate; | |
9ef589d8 | 1381 | } |
86a59229 WL |
1382 | |
1383 | my $subst = stripRegex( $del, \$cmd ); | |
1384 | if( ! defined( $regex ) ){ | |
1385 | Warn( "malformed substitution expression", $fl ); | |
1386 | $error++; | |
0a12ae7d LW |
1387 | next; |
1388 | } | |
86a59229 WL |
1389 | $subst = sub2p( $del, $subst, $fl ); |
1390 | ||
1391 | # parse s/// modifier: g|p|0-9|w <file> | |
1392 | my( $global, $nmatch, $print, $write ) = | |
1393 | ( '', '', 0, undef ); | |
1394 | while( $cmd =~ s/^([gp0-9])// ){ | |
1395 | $1 eq 'g' ? ( $global = 'g' ) : | |
1396 | $1 eq 'p' ? ( $print = $1 ) : ( $nmatch .= $1 ); | |
1397 | } | |
1398 | $write = $1 if $cmd =~ s/w\s*(.*)$//; | |
1399 | ### $nmatch =~ s/^(\d)\1*$/$1/; ### may be dangerous? | |
1400 | if( $global && length( $nmatch ) || length( $nmatch ) > 1 ){ | |
1401 | Warn( "conflicting flags `$global$nmatch'", $fl ); | |
1402 | $error++; | |
0a12ae7d LW |
1403 | next; |
1404 | } | |
86a59229 WL |
1405 | |
1406 | $arg = makes( $regex, $subst, | |
1407 | $write, $global, $print, $nmatch, $fl ); | |
1408 | if( ! defined( $arg ) ){ | |
1409 | $error++; | |
8d063cd8 LW |
1410 | next; |
1411 | } | |
86a59229 WL |
1412 | |
1413 | } else { | |
1414 | Warn( "improper delimiter in s command", $fl ); | |
1415 | $error++; | |
1416 | next; | |
1417 | } | |
1418 | ||
1419 | } elsif( $tabref->[1] eq 'tra' ){ | |
1420 | # y/// | |
1421 | # a trailing \ indicates embedded newline | |
1422 | while( $cmd =~ s/(?<!\\)\\$/\n/ ){ | |
1423 | $icom++; | |
1424 | if( $icom > $#Commands ){ | |
1425 | Warn( "unexpected end of script", $fl ); | |
1426 | $error++; | |
1427 | last; | |
1428 | } | |
1429 | $cmd .= $Commands[$icom]; | |
1430 | $Code .= "# $Commands[$icom]\n" if $doGenerate; | |
1431 | } | |
1432 | if( ! length( $cmd ) ){ | |
1433 | Warn( "`y' command requires argument", $fl ); | |
1434 | $error++; | |
1435 | next; | |
1436 | } | |
1437 | my $d = substr( $cmd, 0, 1 ); $cmd = substr( $cmd, 1 ); | |
1438 | if( $d eq '\\' ){ | |
1439 | Warn( "`\\' not valid as delimiter in `y' command", $fl ); | |
1440 | $error++; | |
1441 | next; | |
1442 | } | |
1443 | my $fr = stripTrans( $d, \$cmd ); | |
1444 | if( ! defined( $fr ) || ! length( $cmd ) ){ | |
1445 | Warn( "malformed `y' command argument", $fl ); | |
1446 | $error++; | |
1447 | next; | |
1448 | } | |
1449 | my $to = stripTrans( $d, \$cmd ); | |
1450 | if( ! defined( $to ) ){ | |
1451 | Warn( "malformed `y' command argument", $fl ); | |
1452 | $error++; | |
1453 | next; | |
1454 | } | |
1455 | if( length($fr) != length($to) ){ | |
1456 | Warn( "string lengths in `y' command differ", $fl ); | |
1457 | $error++; | |
1458 | next; | |
1459 | } | |
1460 | if( ! defined( $arg = makey( $fr, $to, $fl ) ) ){ | |
1461 | $error++; | |
1462 | next; | |
8d063cd8 | 1463 | } |
8d063cd8 | 1464 | |
8d063cd8 LW |
1465 | } |
1466 | ||
86a59229 WL |
1467 | # $cmd must be now empty - exception is { |
1468 | if( $cmd !~ /^\s*$/ ){ | |
1469 | if( $key eq '{' ){ | |
1470 | # dirty hack to process command on '{' line | |
1471 | $Commands[$icom--] = $cmd; | |
1472 | } else { | |
1473 | Warn( "extra characters after command ($cmd)", $fl ); | |
1474 | $error++; | |
1475 | next; | |
1476 | } | |
8d063cd8 LW |
1477 | } |
1478 | ||
86a59229 WL |
1479 | # Make Code |
1480 | # | |
1481 | if( &{$tabref->[2]}( $addr1, $addr2, $negated, | |
1482 | $tabref->[3], $arg, $fl ) ){ | |
1483 | $error++; | |
8d063cd8 | 1484 | } |
86a59229 | 1485 | } |
8d063cd8 | 1486 | |
86a59229 WL |
1487 | while( @BlockStack ){ |
1488 | my $bl = pop( @BlockStack ); | |
1489 | Warn( "start of unterminated `{'", $bl ); | |
1490 | $error++; | |
1491 | } | |
8d063cd8 | 1492 | |
86a59229 WL |
1493 | for my $lab ( keys( %Label ) ){ |
1494 | if( ! exists( $Label{$lab}{defined} ) ){ | |
1495 | for my $used ( @{$Label{$lab}{used}} ){ | |
1496 | Warn( "undefined label `$lab'", $used ); | |
1497 | $error++; | |
1498 | } | |
8d063cd8 | 1499 | } |
86a59229 | 1500 | } |
8d063cd8 | 1501 | |
86a59229 WL |
1502 | exit( 1 ) if $error; |
1503 | } | |
8d063cd8 | 1504 | |
8d063cd8 | 1505 | |
86a59229 WL |
1506 | ############## |
1507 | #### MAIN #### | |
1508 | ############## | |
8d063cd8 | 1509 | |
86a59229 WL |
1510 | sub usage(){ |
1511 | print STDERR "Usage: sed [-an] command [file...]\n"; | |
1512 | print STDERR " [-an] [-e command] [-f script-file] [file...]\n"; | |
1513 | } | |
8d063cd8 | 1514 | |
86a59229 WL |
1515 | ################### |
1516 | # Here we go again... | |
1517 | # | |
1518 | my $expr = 0; | |
1519 | while( @ARGV && $ARGV[0] =~ /^-(.)(.*)$/ ){ | |
1520 | my $opt = $1; | |
1521 | my $arg = $2; | |
1522 | shift( @ARGV ); | |
1523 | if( $opt eq 'e' ){ | |
1524 | if( length( $arg ) ){ | |
1525 | push( @Commands, split( "\n", $arg ) ); | |
1526 | } elsif( @ARGV ){ | |
1527 | push( @Commands, shift( @ARGV ) ); | |
1528 | } else { | |
1529 | Warn( "option -e requires an argument" ); | |
1530 | usage(); | |
1531 | exit( 1 ); | |
1532 | } | |
1533 | $expr++; | |
1534 | $Defined{$#Commands} = " #$expr"; | |
1535 | next; | |
1536 | } | |
1537 | if( $opt eq 'f' ){ | |
1538 | my $path; | |
1539 | if( length( $arg ) ){ | |
1540 | $path = $arg; | |
1541 | } elsif( @ARGV ){ | |
1542 | $path = shift( @ARGV ); | |
1543 | } else { | |
1544 | Warn( "option -f requires an argument" ); | |
1545 | usage(); | |
1546 | exit( 1 ); | |
1547 | } | |
1548 | my $fst = $#Commands + 1; | |
1549 | open( SCRIPT, "<$path" ) || die( "$0: $path: could not open ($!)\n" ); | |
1550 | my $cmd; | |
1551 | while( defined( $cmd = <SCRIPT> ) ){ | |
1552 | chomp( $cmd ); | |
1553 | push( @Commands, $cmd ); | |
1554 | } | |
1555 | close( SCRIPT ); | |
1556 | if( $#Commands >= $fst ){ | |
1557 | $Defined{$fst} = "$path"; | |
8d063cd8 | 1558 | } |
86a59229 WL |
1559 | next; |
1560 | } | |
1561 | if( $opt eq '-' && $arg eq '' ){ | |
1562 | last; | |
1563 | } | |
1564 | if( $opt eq 'h' || $opt eq '?' ){ | |
1565 | usage(); | |
1566 | exit( 0 ); | |
1567 | } | |
1568 | if( $opt eq 'n' ){ | |
1569 | $doAutoPrint = 0; | |
1570 | } elsif( $opt eq 'a' ){ | |
1571 | $doOpenWrite = 0; | |
1572 | } else { | |
1573 | Warn( "illegal option `$opt'" ); | |
1574 | usage(); | |
1575 | exit( 1 ); | |
1576 | } | |
1577 | if( length( $arg ) ){ | |
1578 | unshift( @ARGV, "-$arg" ); | |
1579 | } | |
1580 | } | |
8d063cd8 | 1581 | |
86a59229 WL |
1582 | # A singleton command may be the 1st argument when there are no options. |
1583 | # | |
1584 | if( @Commands == 0 ){ | |
1585 | if( @ARGV == 0 ){ | |
1586 | Warn( "no script command given" ); | |
1587 | usage(); | |
1588 | exit( 1 ); | |
1589 | } | |
1590 | push( @Commands, split( "\n", shift( @ARGV ) ) ); | |
1591 | $Defined{0} = ' #1'; | |
1592 | } | |
8d063cd8 | 1593 | |
86a59229 | 1594 | print STDERR "Files: @ARGV\n" if $useDEBUG; |
8d063cd8 | 1595 | |
86a59229 WL |
1596 | # generate leading code |
1597 | # | |
d16f50bd | 1598 | $Func = <<'[TheEnd]'; |
86a59229 | 1599 | |
d16f50bd WL |
1600 | # openARGV: open 1st input file |
1601 | # | |
86a59229 WL |
1602 | sub openARGV(){ |
1603 | unshift( @ARGV, '-' ) unless @ARGV; | |
1604 | my $file = shift( @ARGV ); | |
1605 | open( ARG, "<$file" ) | |
1606 | || die( "$0: can't open $file for reading ($!)\n" ); | |
1607 | $isEOF = 0; | |
1608 | } | |
8d063cd8 | 1609 | |
d16f50bd WL |
1610 | # getsARGV: Read another input line into argument (default: $_). |
1611 | # Move on to next input file, and reset EOF flag $isEOF. | |
86a59229 WL |
1612 | sub getsARGV(;\$){ |
1613 | my $argref = @_ ? shift() : \$_; | |
1614 | while( $isEOF || ! defined( $$argref = <ARG> ) ){ | |
1615 | close( ARG ); | |
1616 | return 0 unless @ARGV; | |
1617 | my $file = shift( @ARGV ); | |
1618 | open( ARG, "<$file" ) | |
1619 | || die( "$0: can't open $file for reading ($!)\n" ); | |
1620 | $isEOF = 0; | |
1621 | } | |
1622 | 1; | |
1623 | } | |
8d063cd8 | 1624 | |
d16f50bd WL |
1625 | # eofARGV: end-of-file test |
1626 | # | |
86a59229 WL |
1627 | sub eofARGV(){ |
1628 | return @ARGV == 0 && ( $isEOF = eof( ARG ) ); | |
1629 | } | |
8d063cd8 | 1630 | |
d16f50bd WL |
1631 | # makeHandle: Generates another file handle for some file (given by its path) |
1632 | # to be written due to a w command or an s command's w flag. | |
86a59229 WL |
1633 | sub makeHandle($){ |
1634 | my( $path ) = @_; | |
1635 | my $handle; | |
1636 | if( ! exists( $wFiles{$path} ) || $wFiles{$path} eq '' ){ | |
1637 | $handle = $wFiles{$path} = gensym(); | |
1638 | if( $doOpenWrite ){ | |
1639 | if( ! open( $handle, ">$path" ) ){ | |
1640 | die( "$0: can't open $path for writing: ($!)\n" ); | |
1641 | } | |
9ef589d8 | 1642 | } |
86a59229 WL |
1643 | } else { |
1644 | $handle = $wFiles{$path}; | |
1645 | } | |
1646 | return $handle; | |
1647 | } | |
9ef589d8 | 1648 | |
d16f50bd WL |
1649 | # printQ: Print queued output which is either a string or a reference |
1650 | # to a pathname. | |
86a59229 WL |
1651 | sub printQ(){ |
1652 | for my $q ( @Q ){ | |
1653 | if( ref( $q ) ){ | |
d16f50bd | 1654 | # flush open w files so that reading this file gets it all |
86a59229 WL |
1655 | if( exists( $wFiles{$$q} ) && $wFiles{$$q} ne '' ){ |
1656 | open( $wFiles{$$q}, ">>$$q" ); | |
1657 | } | |
d16f50bd | 1658 | # copy file to stdout: slow, but safe |
86a59229 | 1659 | if( open( RF, "<$$q" ) ){ |
d16f50bd | 1660 | while( defined( my $line = <RF> ) ){ |
86a59229 WL |
1661 | print $line; |
1662 | } | |
1663 | close( RF ); | |
1664 | } | |
1665 | } else { | |
1666 | print $q; | |
a687059c | 1667 | } |
86a59229 WL |
1668 | } |
1669 | undef( @Q ); | |
1670 | } | |
1671 | ||
d16f50bd WL |
1672 | [TheEnd] |
1673 | ||
1674 | # generate the sed loop | |
1675 | # | |
1676 | $Code .= <<'[TheEnd]'; | |
1677 | sub openARGV(); | |
1678 | sub getsARGV(;\$); | |
1679 | sub eofARGV(); | |
1680 | sub printQ(); | |
1681 | ||
1682 | # Run: the sed loop reading input and applying the script | |
1683 | # | |
86a59229 WL |
1684 | sub Run(){ |
1685 | my( $h, $icnt, $s, $n ); | |
1686 | # hack (not unbreakable :-/) to avoid // matching an empty string | |
1687 | my $z = "\000"; $z =~ /$z/; | |
1688 | # Initialize. | |
1689 | openARGV(); | |
1690 | $Hold = ''; | |
1691 | $CondReg = 0; | |
1692 | $doPrint = $doAutoPrint; | |
1693 | CYCLE: | |
1694 | while( getsARGV() ){ | |
1695 | chomp(); | |
1696 | $CondReg = 0; # cleared on t | |
1697 | BOS:; | |
1698 | [TheEnd] | |
1699 | ||
1700 | # parse - avoid opening files when doing s2p | |
1701 | # | |
1702 | ( $svOpenWrite, $doOpenWrite ) = ( $doOpenWrite, $svOpenWrite ) | |
1703 | if $doGenerate; | |
1704 | Parse(); | |
1705 | ( $svOpenWrite, $doOpenWrite ) = ( $doOpenWrite, $svOpenWrite ) | |
1706 | if $doGenerate; | |
1707 | ||
1708 | # append trailing code | |
1709 | # | |
1710 | $Code .= <<'[TheEnd]'; | |
1711 | EOS: if( $doPrint ){ | |
1712 | print $_, "\n"; | |
1713 | } else { | |
1714 | $doPrint = $doAutoPrint; | |
a687059c | 1715 | } |
86a59229 | 1716 | printQ() if @Q; |
a687059c | 1717 | } |
86a59229 WL |
1718 | |
1719 | exit( 0 ); | |
a687059c | 1720 | } |
86a59229 WL |
1721 | [TheEnd] |
1722 | ||
d16f50bd WL |
1723 | |
1724 | # append optional functions, prepend prototypes | |
1725 | # | |
1726 | my $Proto = "# prototypes\n"; | |
1727 | if( $GenKey{'l'} ){ | |
1728 | $Proto .= "sub _l();\n"; | |
1729 | $Func .= <<'[TheEnd]'; | |
1730 | # _l: l command processing | |
1731 | # | |
1732 | sub _l(){ | |
1733 | my $h = $_; | |
1734 | my $mcpl = 70; | |
1735 | # transform non printing chars into escape notation | |
1736 | $h =~ s/\\/\\\\/g; | |
1737 | if( $h =~ /[^[:print:]]/ ){ | |
1738 | $h =~ s/\a/\\a/g; | |
1739 | $h =~ s/\f/\\f/g; | |
1740 | $h =~ s/\n/\\n/g; | |
1741 | $h =~ s/\t/\\t/g; | |
1742 | $h =~ s/\r/\\r/g; | |
1743 | $h =~ s/\e/\\e/g; | |
1744 | $h =~ s/([^[:print:]])/sprintf("\\%03o", ord($1))/ge; | |
1745 | } | |
1746 | # split into lines of length $mcpl | |
1747 | while( length( $h ) > $mcpl ){ | |
1748 | my $l = substr( $h, 0, $mcpl-1 ); | |
1749 | $h = substr( $h, $mcpl ); | |
1750 | # remove incomplete \-escape from end of line | |
1751 | if( $l =~ s/(?<!\\)(\\[0-7]{0,2})$// ){ | |
1752 | $h = $1 . $h; | |
1753 | } | |
1754 | print $l, "\\\n"; | |
1755 | } | |
1756 | print "$h\$\n"; | |
1757 | } | |
1758 | ||
1759 | [TheEnd] | |
1760 | } | |
1761 | ||
1762 | if( $GenKey{'r'} ){ | |
1763 | $Proto .= "sub _r(\$);\n"; | |
1764 | $Func .= <<'[TheEnd]'; | |
1765 | # _r: r command processing: Save a reference to the pathname. | |
1766 | # | |
1767 | sub _r($){ | |
1768 | my $path = shift(); | |
1769 | push( @Q, \$path ); | |
1770 | } | |
1771 | ||
1772 | [TheEnd] | |
1773 | } | |
1774 | ||
1775 | if( $GenKey{'t'} ){ | |
1776 | $Proto .= "sub _t();\n"; | |
1777 | $Func .= <<'[TheEnd]'; | |
1778 | # _t: t command - condition register test/reset | |
1779 | # | |
1780 | sub _t(){ | |
1781 | my $res = $CondReg; | |
1782 | $CondReg = 0; | |
1783 | $res; | |
1784 | } | |
1785 | ||
1786 | [TheEnd] | |
1787 | } | |
1788 | ||
1789 | if( $GenKey{'w'} ){ | |
1790 | $Proto .= "sub _w(\$);\n"; | |
1791 | $Func .= <<'[TheEnd]'; | |
1792 | # _w: w command and s command's w flag - write to file | |
1793 | # | |
1794 | sub _w($){ | |
1795 | my $path = shift(); | |
1796 | my $handle = $wFiles{$path}; | |
1797 | if( ! $doOpenWrite && ! defined( fileno( $handle ) ) ){ | |
1798 | open( $handle, ">$path" ) | |
1799 | || die( "$0: $path: cannot open ($!)\n" ); | |
1800 | } | |
1801 | print $handle $_, "\n"; | |
1802 | } | |
1803 | ||
1804 | [TheEnd] | |
1805 | } | |
1806 | ||
1807 | $Code = $Proto . $Code; | |
1808 | ||
86a59229 WL |
1809 | # magic "#n" - same as -n option |
1810 | # | |
1811 | $doAutoPrint = 0 if substr( $Commands[0], 0, 2 ) eq '#n'; | |
a687059c | 1812 | |
86a59229 WL |
1813 | # eval code - check for errors |
1814 | # | |
d16f50bd WL |
1815 | print "Code:\n$Code$Func" if $useDEBUG; |
1816 | eval $Code . $Func; | |
86a59229 | 1817 | if( $@ ){ |
d16f50bd | 1818 | print "Code:\n$Code$Func"; |
86a59229 | 1819 | die( "$0: internal error - generated incorrect Perl code: $@\n" ); |
9ef589d8 LW |
1820 | } |
1821 | ||
86a59229 WL |
1822 | if( $doGenerate ){ |
1823 | ||
1824 | # write full Perl program | |
1825 | # | |
1826 | ||
d16f50bd | 1827 | # bang line, declarations, prototypes |
86a59229 WL |
1828 | print <<TheEnd; |
1829 | #!$perlpath -w | |
1830 | eval 'exec $perlpath -S \$0 \${1+"\$@"}' | |
1831 | if 0; | |
9ae2b9a0 | 1832 | \$0 =~ s/^.*?(\\w+)\[\\.\\w+\]*\$/\$1/; |
86a59229 WL |
1833 | |
1834 | use strict; | |
1835 | use Symbol; | |
1836 | use vars qw{ \$isEOF \$Hold \%wFiles \@Q \$CondReg | |
1837 | \$doAutoPrint \$doOpenWrite \$doPrint }; | |
1838 | \$doAutoPrint = $doAutoPrint; | |
1839 | \$doOpenWrite = $doOpenWrite; | |
1840 | TheEnd | |
1841 | ||
1842 | my $wf = "'" . join( "', '", keys( %wFiles ) ) . "'"; | |
1843 | if( $wf ne "''" ){ | |
1844 | print <<TheEnd; | |
1845 | sub makeHandle(\$); | |
1846 | for my \$p ( $wf ){ | |
1847 | exit( 1 ) unless makeHandle( \$p ); | |
9ef589d8 | 1848 | } |
86a59229 WL |
1849 | TheEnd |
1850 | } | |
9ef589d8 | 1851 | |
86a59229 | 1852 | print $Code; |
d16f50bd WL |
1853 | print "Run();\n"; |
1854 | print $Func; | |
86a59229 | 1855 | exit( 0 ); |
1aa91729 | 1856 | |
86a59229 WL |
1857 | } else { |
1858 | ||
1859 | # execute: make handles (and optionally open) all w files; run! | |
86a59229 WL |
1860 | for my $p ( keys( %wFiles ) ){ |
1861 | exit( 1 ) unless makeHandle( $p ); | |
1862 | } | |
d16f50bd | 1863 | Run(); |
1aa91729 | 1864 | } |
86a59229 WL |
1865 | |
1866 | ||
1867 | =head1 ENVIRONMENT | |
1868 | ||
1869 | The environment variable C<PSEDEXTBRE> may be set to extend BREs. | |
1870 | See L<"Additional Atoms">. | |
1871 | ||
1872 | =head1 DIAGNOSTICS | |
1873 | ||
1874 | =over 4 | |
1875 | ||
3484938b | 1876 | =item ambiguous translation for character `%s' in `y' command |
86a59229 WL |
1877 | |
1878 | The indicated character appears twice, with different translations. | |
1879 | ||
1880 | =item `[' cannot be last in pattern | |
1881 | ||
1882 | A `[' in a BRE indicates the beginning of a I<bracket expression>. | |
1883 | ||
1884 | =item `\' cannot be last in pattern | |
1885 | ||
1886 | A `\' in a BRE is used to make the subsequent character literal. | |
1887 | ||
1888 | =item `\' cannot be last in substitution | |
1889 | ||
2a467c83 | 1890 | A `\' in a substitution string is used to make the subsequent character literal. |
86a59229 WL |
1891 | |
1892 | =item conflicting flags `%s' | |
1893 | ||
1894 | In an B<s> command, either the `g' flag and an n-th occurrence flag, or | |
1895 | multiple n-th occurrence flags are specified. Note that only the digits | |
1896 | `1' through `9' are permitted. | |
1897 | ||
1898 | =item duplicate label %s (first defined at %s) | |
1899 | ||
1900 | =item excess address(es) | |
1901 | ||
1902 | The command has more than the permitted number of addresses. | |
1903 | ||
1904 | =item extra characters after command (%s) | |
1905 | ||
1906 | =item illegal option `%s' | |
1907 | ||
1908 | =item improper delimiter in s command | |
1909 | ||
1910 | The BRE and substitution may not be delimited with `\' or newline. | |
1911 | ||
1912 | =item invalid address after `,' | |
1913 | ||
1914 | =item invalid backreference (%s) | |
1915 | ||
1916 | The specified backreference number exceeds the number of backreferences | |
1917 | in the BRE. | |
1918 | ||
1919 | =item invalid repeat clause `\{%s\}' | |
1920 | ||
1921 | The repeat clause does not contain a valid integer value, or pair of | |
1922 | values. | |
1923 | ||
1924 | =item malformed regex, 1st address | |
1925 | ||
1926 | =item malformed regex, 2nd address | |
1927 | ||
1928 | =item malformed regular expression | |
1929 | ||
1930 | =item malformed substitution expression | |
1931 | ||
1932 | =item malformed `y' command argument | |
1933 | ||
1934 | The first or second string of a B<y> command is syntactically incorrect. | |
1935 | ||
1936 | =item maximum less than minimum in `\{%s\}' | |
1937 | ||
1938 | =item no script command given | |
1939 | ||
1940 | There must be at least one B<-e> or one B<-f> option specifying a | |
1941 | script or script file. | |
1942 | ||
1943 | =item `\' not valid as delimiter in `y' command | |
1944 | ||
1945 | =item option -e requires an argument | |
1946 | ||
1947 | =item option -f requires an argument | |
1948 | ||
1949 | =item `s' command requires argument | |
1950 | ||
1951 | =item start of unterminated `{' | |
1952 | ||
1953 | =item string lengths in `y' command differ | |
1954 | ||
863b2ca0 | 1955 | The translation table strings in a B<y> command must have equal lengths. |
86a59229 WL |
1956 | |
1957 | =item undefined label `%s' | |
1958 | ||
1959 | =item unexpected `}' | |
1960 | ||
1961 | A B<}> command without a preceding B<{> command was encountered. | |
1962 | ||
1963 | =item unexpected end of script | |
1964 | ||
1965 | The end of the script was reached although a text line after a | |
1966 | B<a>, B<c> or B<i> command indicated another line. | |
1967 | ||
1968 | =item unknown command `%s' | |
1969 | ||
1970 | =item unterminated `[' | |
1971 | ||
1972 | A BRE contains an unterminated bracket expression. | |
1973 | ||
1974 | =item unterminated `\(' | |
1975 | ||
1976 | A BRE contains an unterminated backreference. | |
1977 | ||
1978 | =item `\{' without closing `\}' | |
1979 | ||
1980 | A BRE contains an unterminated bounds specification. | |
1981 | ||
1982 | =item `\)' without preceding `\(' | |
1983 | ||
1984 | =item `y' command requires argument | |
1985 | ||
1986 | =back | |
1987 | ||
1988 | =head1 EXAMPLE | |
1989 | ||
1990 | The basic material for the preceding section was generated by running | |
1991 | the sed script | |
1992 | ||
1993 | #no autoprint | |
1994 | s/^.*Warn( *"\([^"]*\)".*$/\1/ | |
1995 | t process | |
1996 | b | |
1997 | :process | |
1998 | s/$!/%s/g | |
1999 | s/$[_[:alnum:]]\{1,\}/%s/g | |
2000 | s/\\\\/\\/g | |
2001 | s/^/=item / | |
2002 | p | |
2003 | ||
2004 | on the program's own text, and piping the output into C<sort -u>. | |
2005 | ||
2006 | ||
2007 | =head1 SED SCRIPT TRANSLATION | |
2008 | ||
2009 | If this program is invoked with the name F<s2p> it will act as a | |
2010 | sed-to-Perl translator. After option processing (all other | |
2011 | arguments are ignored), a Perl program is printed on standard | |
2012 | output, which will process the input stream (as read from all | |
2013 | arguments) in the way defined by the sed script and the option setting | |
2014 | used for the translation. | |
2015 | ||
2016 | =head1 SEE ALSO | |
2017 | ||
2018 | perl(1), re_format(7) | |
2019 | ||
2020 | =head1 BUGS | |
2021 | ||
2022 | The B<l> command will show escape characters (ESC) as `C<\e>', but | |
2023 | a vertical tab (VT) in octal. | |
2024 | ||
2025 | Trailing spaces are truncated from labels in B<:>, B<t> and B<b> commands. | |
2026 | ||
2027 | The meaning of an empty regular expression (`C<//>'), as defined by B<sed>, | |
2028 | is "the last pattern used, at run time". This deviates from the Perl | |
2029 | interpretation, which will re-use the "last last successfully executed | |
2030 | regular expression". Since keeping track of pattern usage would create | |
2031 | terribly cluttered code, and differences would only appear in obscure | |
2032 | context (where other B<sed> implementations appear to deviate, too), | |
2033 | the Perl semantics was adopted. Note that common usage of this feature, | |
2034 | such as in C</abc/s//xyz/>, will work as expected. | |
2035 | ||
2036 | Collating elements (of bracket expressions in BREs) are not implemented. | |
2037 | ||
2038 | =head1 STANDARDS | |
2039 | ||
2040 | This B<sed> implementation conforms to the IEEE Std1003.2-1992 ("POSIX.2") | |
2041 | definition of B<sed>, and is compatible with the I<OpenBSD> | |
2042 | implementation, except where otherwise noted (see L<"BUGS">). | |
2043 | ||
2044 | =head1 AUTHOR | |
2045 | ||
2046 | This Perl implementation of I<sed> was written by Wolfgang Laun, | |
2047 | I<Wolfgang.Laun@alcatel.at>. | |
2048 | ||
2049 | =head1 COPYRIGHT and LICENSE | |
2050 | ||
2051 | This program is free and open software. You may use, modify, | |
2052 | distribute, and sell this program (and any modified variants) in any | |
2053 | way you wish, provided you do not restrict others from doing the same. | |
2054 | ||
2055 | =cut | |
2056 | ||
a687059c | 2057 | !NO!SUBS! |
4633a7c4 LW |
2058 | |
2059 | close OUT or die "Can't close $file: $!"; | |
2060 | chmod 0755, $file or die "Can't reset permissions for $file: $!\n"; | |
d38b618a | 2061 | unlink 'psed'; |
96021e87 | 2062 | print "Linking $file to psed.\n"; |
d38b618a | 2063 | if (defined $Config{d_link}) { |
96021e87 | 2064 | link $file, 'psed'; |
d38b618a A |
2065 | } else { |
2066 | unshift @INC, '../lib'; | |
2067 | require File::Copy; | |
2068 | File::Copy::syscopy('s2p', 'psed'); | |
2069 | } | |
4633a7c4 | 2070 | exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':'; |
8a5546a1 | 2071 | chdir $origdir; |