| Tristan Matthews | 0461646 | 2013-11-14 16:09:34 -0500 | [diff] [blame] | 1 | #! /usr/bin/perl -w |
| 2 | |
| 3 | # Script to turn PCRE man pages into HTML |
| 4 | |
| 5 | |
| 6 | # Subroutine to handle font changes and other escapes |
| 7 | |
| 8 | sub do_line { |
| 9 | my($s) = $_[0]; |
| 10 | |
| 11 | $s =~ s/</</g; # Deal with < and > |
| 12 | $s =~ s/>/>/g; |
| 13 | $s =~ s"\\fI(.*?)\\f[RP]"<i>$1</i>"g; |
| 14 | $s =~ s"\\fB(.*?)\\f[RP]"<b>$1</b>"g; |
| 15 | $s =~ s"\\e"\\"g; |
| 16 | $s =~ s/(?<=Copyright )\(c\)/©/g; |
| 17 | $s; |
| 18 | } |
| 19 | |
| 20 | # Subroutine to ensure not in a paragraph |
| 21 | |
| 22 | sub end_para { |
| 23 | if ($inpara) |
| 24 | { |
| 25 | print TEMP "</PRE>\n" if ($inpre); |
| 26 | print TEMP "</P>\n"; |
| 27 | } |
| 28 | $inpara = $inpre = 0; |
| 29 | $wrotetext = 0; |
| 30 | } |
| 31 | |
| 32 | # Subroutine to start a new paragraph |
| 33 | |
| 34 | sub new_para { |
| 35 | &end_para(); |
| 36 | print TEMP "<P>\n"; |
| 37 | $inpara = 1; |
| 38 | } |
| 39 | |
| 40 | |
| 41 | # Main program |
| 42 | |
| 43 | $innf = 0; |
| 44 | $inpara = 0; |
| 45 | $inpre = 0; |
| 46 | $wrotetext = 0; |
| 47 | $toc = 0; |
| 48 | $ref = 1; |
| 49 | |
| 50 | while ($#ARGV >= 0 && $ARGV[0] =~ /^-/) |
| 51 | { |
| 52 | $toc = 1 if $ARGV[0] eq "-toc"; |
| 53 | shift; |
| 54 | } |
| 55 | |
| 56 | # Initial output to STDOUT |
| 57 | |
| 58 | print <<End ; |
| 59 | <html> |
| 60 | <head> |
| 61 | <title>$ARGV[0] specification</title> |
| 62 | </head> |
| 63 | <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> |
| 64 | <h1>$ARGV[0] man page</h1> |
| 65 | <p> |
| 66 | Return to the <a href="index.html">PCRE index page</a>. |
| 67 | </p> |
| 68 | <p> |
| 69 | This page is part of the PCRE HTML documentation. It was generated automatically |
| 70 | from the original man page. If there is any nonsense in it, please consult the |
| 71 | man page, in case the conversion went wrong. |
| 72 | <br> |
| 73 | End |
| 74 | |
| 75 | print "<ul>\n" if ($toc); |
| 76 | |
| 77 | open(TEMP, ">/tmp/$$") || die "Can't open /tmp/$$ for output\n"; |
| 78 | |
| 79 | while (<STDIN>) |
| 80 | { |
| 81 | # Handle lines beginning with a dot |
| 82 | |
| 83 | if (/^\./) |
| 84 | { |
| 85 | # Some of the PCRE man pages used to contain instances of .br. However, |
| 86 | # they should have all been removed because they cause trouble in some |
| 87 | # (other) automated systems that translate man pages to HTML. Complain if |
| 88 | # we find .br or .in (another macro that is deprecated). |
| 89 | |
| 90 | if (/^\.br/ || /^\.in/) |
| 91 | { |
| 92 | print STDERR "\n*** Deprecated macro encountered - rewrite needed\n"; |
| 93 | print STDERR "*** $_\n"; |
| 94 | die "*** Processing abandoned\n"; |
| 95 | } |
| 96 | |
| 97 | # Instead of .br, relevent "literal" sections are enclosed in .nf/.fi. |
| 98 | |
| 99 | elsif (/^\.nf/) |
| 100 | { |
| 101 | $innf = 1; |
| 102 | } |
| 103 | |
| 104 | elsif (/^\.fi/) |
| 105 | { |
| 106 | $innf = 0; |
| 107 | } |
| 108 | |
| 109 | # Handling .sp is subtle. If it is inside a literal section, do nothing if |
| 110 | # the next line is a non literal text line; similarly, if not inside a |
| 111 | # literal section, do nothing if a literal follows. The point being that |
| 112 | # the <pre> and </pre> that delimit literal sections will do the spacing. |
| 113 | # Always skip if no previous output. |
| 114 | |
| 115 | elsif (/^\.sp/) |
| 116 | { |
| 117 | if ($wrotetext) |
| 118 | { |
| 119 | $_ = <STDIN>; |
| 120 | if ($inpre) |
| 121 | { |
| 122 | print TEMP "\n" if (/^[\s.]/); |
| 123 | } |
| 124 | else |
| 125 | { |
| 126 | print TEMP "<br>\n<br>\n" if (!/^[\s.]/); |
| 127 | } |
| 128 | redo; # Now process the lookahead line we just read |
| 129 | } |
| 130 | } |
| 131 | elsif (/^\.TP/ || /^\.PP/ || /^\.P/) |
| 132 | { |
| 133 | &new_para(); |
| 134 | } |
| 135 | elsif (/^\.SH\s*("?)(.*)\1/) |
| 136 | { |
| 137 | # Ignore the NAME section |
| 138 | if ($2 =~ /^NAME\b/) |
| 139 | { |
| 140 | <STDIN>; |
| 141 | next; |
| 142 | } |
| 143 | |
| 144 | &end_para(); |
| 145 | my($title) = &do_line($2); |
| 146 | if ($toc) |
| 147 | { |
| 148 | printf("<li><a name=\"TOC%d\" href=\"#SEC%d\">$title</a>\n", |
| 149 | $ref, $ref); |
| 150 | printf TEMP ("<br><a name=\"SEC%d\" href=\"#TOC1\">$title</a><br>\n", |
| 151 | $ref, $ref); |
| 152 | $ref++; |
| 153 | } |
| 154 | else |
| 155 | { |
| 156 | print TEMP "<br><b>\n$title\n</b><br>\n"; |
| 157 | } |
| 158 | } |
| 159 | elsif (/^\.SS\s*("?)(.*)\1/) |
| 160 | { |
| 161 | &end_para(); |
| 162 | my($title) = &do_line($2); |
| 163 | print TEMP "<br><b>\n$title\n</b><br>\n"; |
| 164 | } |
| 165 | elsif (/^\.B\s*(.*)/) |
| 166 | { |
| 167 | &new_para() if (!$inpara); |
| 168 | $_ = &do_line($1); |
| 169 | s/"(.*?)"/$1/g; |
| 170 | print TEMP "<b>$_</b>\n"; |
| 171 | $wrotetext = 1; |
| 172 | } |
| 173 | elsif (/^\.I\s*(.*)/) |
| 174 | { |
| 175 | &new_para() if (!$inpara); |
| 176 | $_ = &do_line($1); |
| 177 | s/"(.*?)"/$1/g; |
| 178 | print TEMP "<i>$_</i>\n"; |
| 179 | $wrotetext = 1; |
| 180 | } |
| 181 | |
| 182 | # A comment that starts "HREF" takes the next line as a name that |
| 183 | # is turned into a hyperlink, using the text given, which might be |
| 184 | # in a special font. If it ends in () or (digits) or punctuation, they |
| 185 | # aren't part of the link. |
| 186 | |
| 187 | elsif (/^\.\\"\s*HREF/) |
| 188 | { |
| 189 | $_=<STDIN>; |
| 190 | chomp; |
| 191 | $_ = &do_line($_); |
| 192 | $_ =~ s/\s+$//; |
| 193 | $_ =~ /^(?:<.>)?([^<(]+)(?:\(\))?(?:<\/.>)?(?:\(\d+\))?[.,;:]?$/; |
| 194 | print TEMP "<a href=\"$1.html\">$_</a>\n"; |
| 195 | } |
| 196 | |
| 197 | # A comment that starts "HTML" inserts literal HTML |
| 198 | |
| 199 | elsif (/^\.\\"\s*HTML\s*(.*)/) |
| 200 | { |
| 201 | print TEMP $1; |
| 202 | } |
| 203 | |
| 204 | # A comment that starts < inserts that HTML at the end of the |
| 205 | # *next* input line - so as not to get a newline between them. |
| 206 | |
| 207 | elsif (/^\.\\"\s*(<.*>)/) |
| 208 | { |
| 209 | my($markup) = $1; |
| 210 | $_=<STDIN>; |
| 211 | chomp; |
| 212 | $_ = &do_line($_); |
| 213 | $_ =~ s/\s+$//; |
| 214 | print TEMP "$_$markup\n"; |
| 215 | } |
| 216 | |
| 217 | # A comment that starts JOIN joins the next two lines together, with one |
| 218 | # space between them. Then that line is processed. This is used in some |
| 219 | # displays where two lines are needed for the "man" version. JOINSH works |
| 220 | # the same, except that it assumes this is a shell command, so removes |
| 221 | # continuation backslashes. |
| 222 | |
| 223 | elsif (/^\.\\"\s*JOIN(SH)?/) |
| 224 | { |
| 225 | my($one,$two); |
| 226 | $one = <STDIN>; |
| 227 | $two = <STDIN>; |
| 228 | $one =~ s/\s*\\e\s*$// if (defined($1)); |
| 229 | chomp($one); |
| 230 | $two =~ s/^\s+//; |
| 231 | $_ = "$one $two"; |
| 232 | redo; # Process the joined lines |
| 233 | } |
| 234 | |
| 235 | # .EX/.EE are used in the pcredemo page to bracket the entire program, |
| 236 | # which is unmodified except for turning backslash into "\e". |
| 237 | |
| 238 | elsif (/^\.EX\s*$/) |
| 239 | { |
| 240 | print TEMP "<PRE>\n"; |
| 241 | while (<STDIN>) |
| 242 | { |
| 243 | last if /^\.EE\s*$/; |
| 244 | s/\\e/\\/g; |
| 245 | s/&/&/g; |
| 246 | s/</</g; |
| 247 | s/>/>/g; |
| 248 | print TEMP; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | # Ignore anything not recognized |
| 253 | |
| 254 | next; |
| 255 | } |
| 256 | |
| 257 | # Line does not begin with a dot. Replace blank lines with new paragraphs |
| 258 | |
| 259 | if (/^\s*$/) |
| 260 | { |
| 261 | &end_para() if ($wrotetext); |
| 262 | next; |
| 263 | } |
| 264 | |
| 265 | # Convert fonts changes and output an ordinary line. Ensure that indented |
| 266 | # lines are marked as literal. |
| 267 | |
| 268 | $_ = &do_line($_); |
| 269 | &new_para() if (!$inpara); |
| 270 | |
| 271 | if (/^\s/) |
| 272 | { |
| 273 | if (!$inpre) |
| 274 | { |
| 275 | print TEMP "<pre>\n"; |
| 276 | $inpre = 1; |
| 277 | } |
| 278 | } |
| 279 | elsif ($inpre) |
| 280 | { |
| 281 | print TEMP "</pre>\n"; |
| 282 | $inpre = 0; |
| 283 | } |
| 284 | |
| 285 | # Add <br> to the end of a non-literal line if we are within .nf/.fi |
| 286 | |
| 287 | $_ .= "<br>\n" if (!$inpre && $innf); |
| 288 | |
| 289 | print TEMP; |
| 290 | $wrotetext = 1; |
| 291 | } |
| 292 | |
| 293 | # The TOC, if present, will have been written - terminate it |
| 294 | |
| 295 | print "</ul>\n" if ($toc); |
| 296 | |
| 297 | # Copy the remainder to the standard output |
| 298 | |
| 299 | close(TEMP); |
| 300 | open(TEMP, "/tmp/$$") || die "Can't open /tmp/$$ for input\n"; |
| 301 | |
| 302 | print while (<TEMP>); |
| 303 | |
| 304 | print <<End ; |
| 305 | <p> |
| 306 | Return to the <a href="index.html">PCRE index page</a>. |
| 307 | </p> |
| 308 | End |
| 309 | |
| 310 | close(TEMP); |
| 311 | unlink("/tmp/$$"); |
| 312 | |
| 313 | # End |