1### ==================================================================== 2### @Awk-file{ 3### author = "Nelson H. F. Beebe", 4### version = "1.00", 5### date = "09 October 1996", 6### time = "15:57:06 MDT", 7### filename = "journal-toc.awk", 8### address = "Center for Scientific Computing 9### Department of Mathematics 10### University of Utah 11### Salt Lake City, UT 84112 12### USA", 13### telephone = "+1 801 581 5254", 14### FAX = "+1 801 581 4148", 15### URL = "http://www.math.utah.edu/~beebe", 16### checksum = "25092 977 3357 26493", 17### email = "beebe@math.utah.edu (Internet)", 18### codetable = "ISO/ASCII", 19### keywords = "BibTeX, bibliography, HTML, journal table of 20### contents", 21### supported = "yes", 22### docstring = "Create a journal cover table of contents from 23### <at>Article{...} entries in a journal BibTeX 24### .bib file for checking the bibliography 25### database against the actual journal covers. 26### The output can be either plain text, or HTML. 27### 28### Usage: 29### bibclean -max-width 0 BibTeX-file(s) | \ 30### bibsort -byvolume | \ 31### awk -f journal-toc.awk \ 32### [-v HTML=nnn] [-v INDENT=nnn] \ 33### [-v BIBFILEURL=url] >foo.toc 34### 35### or if the bibliography is already sorted 36### by volume, 37### 38### bibclean -max-width 0 BibTeX-file(s) | \ 39### awk -f journal-toc.awk \ 40### [-v HTML=nnn] [-v INDENT=nnn] \ 41### [-v BIBFILEURL=url] >foo.toc 42### 43### A non-zero value of the command-line option, 44### HTML=nnn, results in HTML output instead of 45### the default plain ASCII text (corresponding 46### to HTML=0). The 47### 48### The INDENT=nnn command-line option specifies 49### the number of blanks to indent each logical 50### level of HTML. The default is INDENT=4. 51### INDENT=0 suppresses indentation. The INDENT 52### option has no effect when the default HTML=0 53### (plain text output) option is in effect. 54### 55### When HTML output is selected, the 56### BIBFILEURL=url command-line option provides a 57### way to request hypertext links from table of 58### contents page numbers to the complete BibTeX 59### entry for the article. These links are 60### created by appending a sharp (#) and the 61### citation label to the BIBFILEURL value, which 62### conforms with the practice of 63### bibtex-to-html.awk. 64### 65### The HTML output form may be useful as a more 66### compact representation of journal article 67### bibliography data than the original BibTeX 68### file provides. Of course, the 69### table-of-contents format provides less 70### information, and is considerably more 71### troublesome for a computer program to parse. 72### 73### When URL key values are provided, they will 74### be used to create hypertext links around 75### article titles. This supports journals that 76### provide article contents on the World-Wide 77### Web. 78### 79### For parsing simplicity, this program requires 80### that BibTeX 81### 82### key = "value" 83### 84### and 85### 86### @String{name = "value"} 87### 88### specifications be entirely contained on 89### single lines, which is readily provided by 90### the `bibclean -max-width 0' filter. It also 91### requires that bibliography entries begin and 92### end at the start of a line, and that 93### quotation marks, rather than balanced braces, 94### delimit string values. This is a 95### conventional format that again can be 96### guaranteed by bibclean. 97### 98### This program requires `new' awk, as described 99### in the book 100### 101### Alfred V. Aho, Brian W. Kernighan, and 102### Peter J. Weinberger, 103### ``The AWK Programming Language'', 104### Addison-Wesley (1988), ISBN 105### 0-201-07981-X, 106### 107### such as provided by programs named (GNU) 108### gawk, nawk, and recent AT&T awk. 109### 110### The checksum field above contains a CRC-16 111### checksum as the first value, followed by the 112### equivalent of the standard UNIX wc (word 113### count) utility output of lines, words, and 114### characters. This is produced by Robert 115### Solovay's checksum utility.", 116### } 117### ==================================================================== 118 119BEGIN { initialize() } 120 121/^ *@ *[Ss][Tt][Rr][Ii][Nn][Gg] *\{/ { do_String(); next } 122 123/^ *@ *[Pp][Rr][Ee][Aa][Mm][Bb][Ll][Ee]/ { next } 124 125/^ *@ *[Aa][Rr][Tt][Ii][Cc][Ll][Ee]/ { do_Article(); next } 126 127/^ *@/ { do_Other(); next } 128 129/^ *author *= *\"/ { do_author(); next } 130 131/^ *journal *= */ { do_journal(); next } 132 133/^ *volume *= *\"/ { do_volume(); next } 134 135/^ *number *= *\"/ { do_number(); next } 136 137/^ *year *= *\"/ { do_year(); next } 138 139/^ *month *= */ { do_month(); next } 140 141/^ *title *= *\"/ { do_title(); next } 142 143/^ *pages *= *\"/ { do_pages(); next } 144 145/^ *URL *= *\"/ { do_URL(); next } 146 147/^ *} *$/ { if (In_Article) do_end_entry(); next } 148 149END { terminate() } 150 151 152######################################################################## 153# NB: The programming conventions for variables in this program are: # 154# UPPERCASE global constants and user options # 155# Initialuppercase global variables # 156# lowercase local variables # 157# Any deviation is an error! # 158######################################################################## 159 160 161function do_Article() 162{ 163 In_Article = 1 164 165 Citation_label = $0 166 sub(/^[^\{]*\{/,"",Citation_label) 167 sub(/ *, *$/,"",Citation_label) 168 169 Author = "" 170 Title = "" 171 Journal = "" 172 Volume = "" 173 Number = "" 174 Month = "" 175 Year = "" 176 Pages = "" 177 Url = "" 178} 179 180 181function do_author() 182{ 183 Author = TeX_to_HTML(get_value($0)) 184} 185 186 187function do_end_entry( k,n,parts) 188{ 189 n = split(Author,parts," and ") 190 if (Last_number != Number) 191 do_new_issue() 192 for (k = 1; k < n; ++k) 193 print_toc_line(parts[k] " and", "", "") 194 Title_prefix = html_begin_title() 195 Title_suffix = html_end_title() 196 if (html_length(Title) <= (MAX_TITLE_CHARS + MIN_LEADERS)) # complete title fits on line 197 print_toc_line(parts[n], Title, html_begin_pages() Pages html_end_pages()) 198 else # need to split long title over multiple lines 199 do_long_title(parts[n], Title, html_begin_pages() Pages html_end_pages()) 200} 201 202 203function do_journal() 204{ 205 if ($0 ~ /[=] *"/) # have journal = "quoted journal name", 206 Journal = get_value($0) 207 else # have journal = journal-abbreviation, 208 { 209 Journal = get_abbrev($0) 210 if (Journal in String) # replace abbrev by its expansion 211 Journal = String[Journal] 212 } 213 gsub(/\\-/,"",Journal) # remove discretionary hyphens 214} 215 216 217function do_long_title(author,title,pages, last_title,n) 218{ 219 title = trim(title) # discard leading and trailing space 220 while (length(title) > 0) 221 { 222 n = html_breakpoint(title,MAX_TITLE_CHARS+MIN_LEADERS) 223 last_title = substr(title,1,n) 224 title = substr(title,n+1) 225 sub(/^ +/,"",title) # discard any leading space 226 print_toc_line(author, last_title, (length(title) == 0) ? pages : "") 227 author = "" 228 } 229} 230 231 232function do_month( k,n,parts) 233{ 234 Month = ($0 ~ /[=] *"/) ? get_value($0) : get_abbrev($0) 235 gsub(/[\"]/,"",Month) 236 gsub(/ *# *\\slash *# */," / ",Month) 237 gsub(/ *# *-+ *# */," / ",Month) 238 n = split(Month,parts," */ *") 239 Month = "" 240 for (k = 1; k <= n; ++k) 241 Month = Month ((k > 1) ? " / " : "") \ 242 ((parts[k] in Month_expansion) ? Month_expansion[parts[k]] : parts[k]) 243} 244 245 246function do_new_issue() 247{ 248 Last_number = Number 249 if (HTML) 250 { 251 if (Last_volume != Volume) 252 { 253 Last_volume = Volume 254 print_line(prefix(2) "<BR>") 255 } 256 html_end_toc() 257 html_begin_issue() 258 print_line(prefix(2) Journal "<BR>") 259 } 260 else 261 { 262 print_line("") 263 print_line(Journal) 264 } 265 266 print_line(strip_html(vol_no_month_year())) 267 268 if (HTML) 269 { 270 html_end_issue() 271 html_toc_entry() 272 html_begin_toc() 273 } 274 else 275 print_line("") 276} 277 278 279function do_number() 280{ 281 Number = get_value($0) 282} 283 284 285function do_Other() 286{ 287 In_Article = 0 288} 289 290 291function do_pages() 292{ 293 Pages = get_value($0) 294 sub(/--[?][?]/,"",Pages) 295} 296 297 298function do_String() 299{ 300 sub(/^[^\{]*\{/,"",$0) # discard up to and including open brace 301 sub(/\} *$/,"",$0) # discard from optional whitespace and trailing brace to end of line 302 String[get_key($0)] = get_value($0) 303} 304 305 306function do_title() 307{ 308 Title = TeX_to_HTML(get_value($0)) 309} 310 311 312function do_URL( parts) 313{ 314 Url = get_value($0) 315 split(Url,parts,"[,;]") # in case we have multiple URLs 316 Url = trim(parts[1]) 317} 318 319 320function do_volume() 321{ 322 Volume = get_value($0) 323} 324 325 326function do_year() 327{ 328 Year = get_value($0) 329} 330 331 332function get_abbrev(s) 333{ # return abbrev from ``key = abbrev,'' 334 sub(/^[^=]*= */,"",s) # discard text up to start of non-blank value 335 sub(/ *,? *$/,"",s) # discard trailing optional whitspace, quote, 336 # optional comma, and optional space 337 return (s) 338} 339 340 341function get_key(s) 342{ # return kay from ``key = "value",'' 343 sub(/^ */,"",s) # discard leading space 344 sub(/ *=.*$/,"",s) # discard everthing after key 345 346 return (s) 347} 348 349 350function get_value(s) 351{ # return value from ``key = "value",'' 352 sub(/^[^\"]*\" */,"",s) # discard text up to start of non-blank value 353 sub(/ *\",? *$/,"",s) # discard trailing optional whitspace, quote, 354 # optional comma, and optional space 355 return (s) 356} 357 358 359function html_accents(s) 360{ 361 if (index(s,"\\") > 0) # important optimization 362 { 363 # Convert common lower-case accented letters according to the 364 # table on p. 169 of in Peter Flynn's ``The World Wide Web 365 # Handbook'', International Thomson Computer Press, 1995, ISBN 366 # 1-85032-205-8. The official table of ISO Latin 1 SGML 367 # entities used in HTML can be found in the file 368 # /usr/local/lib/html-check/lib/ISOlat1.sgml (your path 369 # may differ). 370 371 gsub(/{\\\a}/, "\\à", s) 372 gsub(/{\\'a}/, "\\á", s) 373 gsub(/{\\[\^]a}/,"\\â", s) 374 gsub(/{\\~a}/, "\\ã", s) 375 gsub(/{\\\"a}/, "\\ä", s) 376 gsub(/{\\aa}/, "\\å", s) 377 gsub(/{\\ae}/, "\\æ", s) 378 379 gsub(/\{\\c\{c\}\}/,"\\ç", s) 380 381 gsub(/\{\\\e\}/, "\\è", s) 382 gsub(/\{\\'e\}/, "\\é", s) 383 gsub(/\{\\[\^]e\}/,"\\ê", s) 384 gsub(/\{\\\"e\}/, "\\ë", s) 385 386 gsub(/\{\\\i\}/, "\\ì", s) 387 gsub(/\{\\'i\}/, "\\í", s) 388 gsub(/\{\\[\^]i\}/,"\\î", s) 389 gsub(/\{\\\"i\}/, "\\ï", s) 390 391 # ignore eth and thorn 392 393 gsub(/\{\\~n\}/, "\\ñ", s) 394 395 gsub(/\{\\\o\}/, "\\ò", s) 396 gsub(/\{\\'o\}/, "\\ó", s) 397 gsub(/\{\\[\^]o\}/, "\\ô", s) 398 gsub(/\{\\~o\}/, "\\õ", s) 399 gsub(/\{\\\"o\}/, "\\ö", s) 400 gsub(/\{\\o\}/, "\\ø", s) 401 402 gsub(/\{\\\u\}/, "\\ù", s) 403 gsub(/\{\\'u\}/, "\\ú", s) 404 gsub(/\{\\[\^]u\}/,"\\û", s) 405 gsub(/\{\\\"u\}/, "\\ü", s) 406 407 gsub(/\{\\'y\}/, "\\ý", s) 408 gsub(/\{\\\"y\}/, "\\ÿ", s) 409 410 # Now do the same for upper-case accents 411 412 gsub(/\{\\\A\}/, "\\À", s) 413 gsub(/\{\\'A\}/, "\\Á", s) 414 gsub(/\{\\[\^]A\}/, "\\Â", s) 415 gsub(/\{\\~A\}/, "\\Ã", s) 416 gsub(/\{\\\"A\}/, "\\Ä", s) 417 gsub(/\{\\AA\}/, "\\Å", s) 418 gsub(/\{\\AE\}/, "\\Æ", s) 419 420 gsub(/\{\\c\{C\}\}/,"\\Ç", s) 421 422 gsub(/\{\\\e\}/, "\\È", s) 423 gsub(/\{\\'E\}/, "\\É", s) 424 gsub(/\{\\[\^]E\}/, "\\Ê", s) 425 gsub(/\{\\\"E\}/, "\\Ë", s) 426 427 gsub(/\{\\\I\}/, "\\Ì", s) 428 gsub(/\{\\'I\}/, "\\Í", s) 429 gsub(/\{\\[\^]I\}/, "\\Î", s) 430 gsub(/\{\\\"I\}/, "\\Ï", s) 431 432 # ignore eth and thorn 433 434 gsub(/\{\\~N\}/, "\\Ñ", s) 435 436 gsub(/\{\\\O\}/, "\\Ò", s) 437 gsub(/\{\\'O\}/, "\\Ó", s) 438 gsub(/\{\\[\^]O\}/, "\\Ô", s) 439 gsub(/\{\\~O\}/, "\\Õ", s) 440 gsub(/\{\\\"O\}/, "\\Ö", s) 441 gsub(/\{\\O\}/, "\\Ø", s) 442 443 gsub(/\{\\\U\}/, "\\Ù", s) 444 gsub(/\{\\'U\}/, "\\Ú", s) 445 gsub(/\{\\[\^]U\}/, "\\Û", s) 446 gsub(/\{\\\"U\}/, "\\Ü", s) 447 448 gsub(/\{\\'Y\}/, "\\Ý", s) 449 450 gsub(/\{\\ss\}/, "\\ß", s) 451 452 # Others not mentioned in Flynn's book 453 gsub(/\{\\'\\i\}/,"\\í", s) 454 gsub(/\{\\'\\j\}/,"j", s) 455 } 456 return (s) 457} 458 459 460function html_begin_issue() 461{ 462 print_line("") 463 print_line(prefix(2) "<HR>") 464 print_line("") 465 print_line(prefix(2) "<H1>") 466 print_line(prefix(3) "<A NAME=\"" html_label() "\">") 467} 468 469 470function html_begin_pages() 471{ 472 return ((HTML && (BIBFILEURL != "")) ? ("<A HREF=\"" BIBFILEURL "#" Citation_label "\">") : "") 473} 474 475 476function html_begin_pre() 477{ 478 In_PRE = 1 479 print_line("<PRE>") 480} 481 482 483function html_begin_title() 484{ 485 return ((HTML && (Url != "")) ? ("<A HREF=\"" Url "\">") : "") 486} 487 488 489function html_begin_toc() 490{ 491 html_end_toc() 492 html_begin_pre() 493} 494 495 496function html_body( k) 497{ 498 for (k = 1; k <= BodyLines; ++k) 499 print Body[k] 500} 501 502function html_breakpoint(title,maxlength, break_after,k) 503{ 504 # Return the largest character position in title AFTER which we 505 # can break the title across lines, without exceeding maxlength 506 # visible characters. 507 if (html_length(title) > maxlength) # then need to split title across lines 508 { 509 # In the presence of HTML markup, the initialization of 510 # k here is complicated, because we need to advance it 511 # until html_length(title) is at least maxlength, 512 # without invoking the expensive html_length() function 513 # too frequently. The need to split the title makes the 514 # alternative of delayed insertion of HTML markup much 515 # more complicated. 516 break_after = 0 517 for (k = min(maxlength,length(title)); k < length(title); ++k) 518 { 519 if (substr(title,k+1,1) == " ") 520 { # could break after position k 521 if (html_length(substr(title,1,k)) <= maxlength) 522 break_after = k 523 else # advanced too far, retreat back to last break_after 524 break 525 } 526 } 527 if (break_after == 0) # no breakpoint found by forward scan 528 { # so switch to backward scan 529 for (k = min(maxlength,length(title)) - 1; \ 530 (k > 0) && (substr(title,k+1,1) != " "); --k) 531 ; # find space at which to break title 532 if (k < 1) # no break point found 533 k = length(title) # so must print entire string 534 } 535 else 536 k = break_after 537 } 538 else # title fits on one line 539 k = length(title) 540 return (k) 541} 542 543 544 545function html_end_issue() 546{ 547 print_line(prefix(3) "</A>") 548 print_line(prefix(2) "</H1>") 549} 550 551 552function html_end_pages() 553{ 554 return ((HTML && (BIBFILEURL != "")) ? "</A>" : "") 555} 556 557 558function html_end_pre() 559{ 560 if (In_PRE) 561 { 562 print_line("</PRE>") 563 In_PRE = 0 564 } 565} 566 567 568function html_end_title() 569{ 570 return ((HTML && (Url != "")) ? "</A>" : "") 571} 572 573 574function html_end_toc() 575{ 576 html_end_pre() 577} 578 579 580function html_fonts(s, arg,control_word,k,level,n,open_brace) 581{ 582 open_brace = index(s,"{") 583 if (open_brace > 0) # important optimization 584 { 585 level = 1 586 for (k = open_brace + 1; (level != 0) && (k <= length(s)); ++k) 587 { 588 if (substr(s,k,1) == "{") 589 level++ 590 else if (substr(s,k,1) == "}") 591 level-- 592 } 593 594 # {...} is now found at open_brace ... (k-1) 595 for (control_word in Font_decl_map) # look for {\xxx ...} 596 { 597 if (substr(s,open_brace+1,length(control_word)+1) ~ \ 598 ("\\" control_word "[^A-Za-z]")) 599 { 600 n = open_brace + 1 + length(control_word) 601 arg = trim(substr(s,n,k - n)) 602 if (Font_decl_map[control_word] == "toupper") # arg -> ARG 603 arg = toupper(arg) 604 else if (Font_decl_map[control_word] != "") # arg -> <TAG>arg</TAG> 605 arg = "<" Font_decl_map[control_word] ">" arg "</" Font_decl_map[control_word] ">" 606 return (substr(s,1,open_brace-1) arg html_fonts(substr(s,k))) 607 } 608 } 609 for (control_word in Font_cmd_map) # look for \xxx{...} 610 { 611 if (substr(s,open_brace - length(control_word),length(control_word)) ~ \ 612 ("\\" control_word)) 613 { 614 n = open_brace + 1 615 arg = trim(substr(s,n,k - n)) 616 if (Font_cmd_map[control_word] == "toupper") # arg -> ARG 617 arg = toupper(arg) 618 else if (Font_cmd_map[control_word] != "") # arg -> <TAG>arg</TAG> 619 arg = "<" Font_cmd_map[control_word] ">" arg "</" Font_cmd_map[control_word] ">" 620 n = open_brace - length(control_word) - 1 621 return (substr(s,1,n) arg html_fonts(substr(s,k))) 622 } 623 } 624 } 625 return (s) 626} 627 628 629function html_header() 630{ 631 USER = ENVIRON["USER"] 632 if (USER == "") 633 USER = ENVIRON["LOGNAME"] 634 if (USER == "") 635 USER = "????" 636 "hostname" | getline HOSTNAME 637 "date" | getline DATE 638 ("ypcat passwd | grep '^" USER ":' | awk -F: '{print $5}'") | getline PERSONAL_NAME 639 if (PERSONAL_NAME == "") 640 ("grep '^" USER ":' /etc/passwd | awk -F: '{print $5}'") | getline PERSONAL_NAME 641 642 643 print "<!-- WARNING: Do NOT edit this file. It was converted from -->" 644 print "<!-- BibTeX format to HTML by journal-toc.awk version " VERSION_NUMBER " " VERSION_DATE " -->" 645 print "<!-- on " DATE " -->" 646 print "<!-- for " PERSONAL_NAME " (" USER "@" HOSTNAME ") -->" 647 print "" 648 print "" 649 print "<!DOCTYPE HTML public \"-//IETF//DTD HTML//EN\">" 650 print "" 651 print "<HTML>" 652 print prefix(1) "<HEAD>" 653 print prefix(2) "<TITLE>" 654 print prefix(3) Journal 655 print prefix(2) "</TITLE>" 656 print prefix(2) "<LINK REV=\"made\" HREF=\"mailto:" USER "@" HOSTNAME "\">" 657 print prefix(1) "</HEAD>" 658 print "" 659 print prefix(1) "<BODY>" 660} 661 662 663function html_label( label) 664{ 665 label = Volume "(" Number "):" Month ":" Year 666 # gsub(/[^A-Za-z0-9():,;.\/\-]/,"",label) 667 gsub(/[^[:alnum:]():,;.\/\-]/,"",label) 668 return (label) 669} 670 671 672function html_length(s) 673{ # Return visible length of s, ignoring any HTML markup 674 if (HTML) 675 { 676 gsub(/<\/?[^>]*>/,"",s) # remove SGML tags 677 # gsub(/&[A-Za-z0-9]+;/,"",s) # remove SGML entities 678 gsub(/&[[:alnum:]]+;/,"",s) # remove SGML entities 679 } 680 return (length(s)) 681} 682 683 684function html_toc() 685{ 686 print prefix(2) "<H1>" 687 print prefix(3) "Table of contents for issues of " Journal 688 print prefix(2) "</H1>" 689 print HTML_TOC 690} 691 692 693function html_toc_entry() 694{ 695 HTML_TOC = HTML_TOC " <A HREF=\"#" html_label() "\">" 696 HTML_TOC = HTML_TOC vol_no_month_year() 697 HTML_TOC = HTML_TOC "</A><BR>" "\n" 698} 699 700 701function html_trailer() 702{ 703 html_end_pre() 704 print prefix(1) "</BODY>" 705 print "</HTML>" 706} 707 708 709function initialize() 710{ 711 # NB: Update these when the program changes 712 VERSION_DATE = "[09-Oct-1996]" 713 VERSION_NUMBER = "1.00" 714 715 HTML = (HTML == "") ? 0 : (0 + HTML) 716 717 if (INDENT == "") 718 INDENT = 4 719 720 if (HTML == 0) 721 INDENT = 0 # indentation suppressed in ASCII mode 722 723 LEADERS = " . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ." 724 725 MAX_TITLE_CHARS = 36 # 36 produces a 79-char output line when there is 726 # just an initial page number. If this is 727 # increased, the LEADERS string may need to be 728 # lengthened. 729 730 MIN_LEADERS = 4 # Minimum number of characters from LEADERS 731 # required when leaders are used. The total 732 # number of characters that can appear in a 733 # title line is MAX_TITLE_CHARS + MIN_LEADERS. 734 # Leaders are omitted when the title length is 735 # between MAX_TITLE_CHARS and this sum. 736 737 MIN_LEADERS_SPACE = " " # must be at least MIN_LEADERS characters long 738 739 Month_expansion["jan"] = "January" 740 Month_expansion["feb"] = "February" 741 Month_expansion["mar"] = "March" 742 Month_expansion["apr"] = "April" 743 Month_expansion["may"] = "May" 744 Month_expansion["jun"] = "June" 745 Month_expansion["jul"] = "July" 746 Month_expansion["aug"] = "August" 747 Month_expansion["sep"] = "September" 748 Month_expansion["oct"] = "October" 749 Month_expansion["nov"] = "November" 750 Month_expansion["dec"] = "December" 751 752 Font_cmd_map["\\emph"] = "EM" 753 Font_cmd_map["\\textbf"] = "B" 754 Font_cmd_map["\\textit"] = "I" 755 Font_cmd_map["\\textmd"] = "" 756 Font_cmd_map["\\textrm"] = "" 757 Font_cmd_map["\\textsc"] = "toupper" 758 Font_cmd_map["\\textsl"] = "I" 759 Font_cmd_map["\\texttt"] = "t" 760 Font_cmd_map["\\textup"] = "" 761 762 Font_decl_map["\\bf"] = "B" 763 Font_decl_map["\\em"] = "EM" 764 Font_decl_map["\\it"] = "I" 765 Font_decl_map["\\rm"] = "" 766 Font_decl_map["\\sc"] = "toupper" 767 Font_decl_map["\\sf"] = "" 768 Font_decl_map["\\tt"] = "TT" 769 Font_decl_map["\\itshape"] = "I" 770 Font_decl_map["\\upshape"] = "" 771 Font_decl_map["\\slshape"] = "I" 772 Font_decl_map["\\scshape"] = "toupper" 773 Font_decl_map["\\mdseries"] = "" 774 Font_decl_map["\\bfseries"] = "B" 775 Font_decl_map["\\rmfamily"] = "" 776 Font_decl_map["\\sffamily"] = "" 777 Font_decl_map["\\ttfamily"] = "TT" 778} 779 780function min(a,b) 781{ 782 return (a < b) ? a : b 783} 784 785 786function prefix(level) 787{ 788 # Return a prefix of up to 60 blanks 789 790 if (In_PRE) 791 return ("") 792 else 793 return (substr(" ", \ 794 1, INDENT * level)) 795} 796 797 798function print_line(line) 799{ 800 if (HTML) # must buffer in memory so that we can accumulate TOC 801 Body[++BodyLines] = line 802 else 803 print line 804} 805 806 807function print_toc_line(author,title,pages, extra,leaders,n,t) 808{ 809 # When we have a multiline title, the hypertext link goes only 810 # on the first line. A multiline hypertext link looks awful 811 # because of long underlines under the leading indentation. 812 813 if (pages == "") # then no leaders needed in title lines other than last one 814 t = sprintf("%31s %s%s%s", author, Title_prefix, title, Title_suffix) 815 else # last title line, with page number 816 { 817 n = html_length(title) # potentially expensive 818 extra = n % 2 # extra space for aligned leader dots 819 if (n <= MAX_TITLE_CHARS) # then need leaders 820 leaders = substr(LEADERS, 1, MAX_TITLE_CHARS + MIN_LEADERS - extra - \ 821 min(MAX_TITLE_CHARS,n)) 822 else # title (almost) fills line, so no leaders 823 leaders = substr(MIN_LEADERS_SPACE,1, \ 824 (MAX_TITLE_CHARS + MIN_LEADERS - extra - n)) 825 t = sprintf("%31s %s%s%s%s%s %4s", \ 826 author, Title_prefix, title, Title_suffix, \ 827 (extra ? " " : ""), leaders, pages) 828 } 829 830 Title_prefix = "" # forget any hypertext 831 Title_suffix = "" # link material 832 833 # Efficency note: an earlier version accumulated the body in a 834 # single scalar like this: "Body = Body t". Profiling revealed 835 # this statement as the major hot spot, and the change to array 836 # storage made the program more than twice as fast. This 837 # suggests that awk might benefit from an optimization of 838 # "s = s t" that uses realloc() instead of malloc(). 839 if (HTML) 840 Body[++BodyLines] = t 841 else 842 print t 843} 844 845 846function protect_SGML_characters(s) 847{ 848 gsub(/&/,"\\&",s) # NB: this one MUST be first 849 gsub(/</,"\\<",s) 850 gsub(/>/,"\\>",s) 851 gsub(/\"/,"\\"",s) 852 return (s) 853} 854 855 856function strip_braces(s, k) 857{ # strip non-backslashed braces from s and return the result 858 859 return (strip_char(strip_char(s,"{"),"}")) 860} 861 862 863function strip_char(s,c, k) 864{ # strip non-backslashed instances of c from s, and return the result 865 k = index(s,c) 866 if (k > 0) # then found the character 867 { 868 if (substr(s,k-1,1) != "\\") # then not backslashed char 869 s = substr(s,1,k-1) strip_char(substr(s,k+1),c) # so remove it (recursively) 870 else # preserve backslashed char 871 s = substr(s,1,k) strip_char(s,k+1,c) 872 } 873 return (s) 874} 875 876 877function strip_html(s) 878{ 879 gsub(/<\/?[^>]*>/,"",s) 880 return (s) 881} 882 883 884function terminate() 885{ 886 if (HTML) 887 { 888 html_end_pre() 889 890 HTML = 0 # NB: stop line buffering 891 html_header() 892 html_toc() 893 html_body() 894 html_trailer() 895 } 896} 897 898 899function TeX_to_HTML(s, k,n,parts) 900{ 901 # First convert the four SGML reserved characters to SGML entities 902 if (HTML) 903 { 904 gsub(/>/, "\\>", s) 905 gsub(/</, "\\<", s) 906 gsub(/"/, "\\"", s) 907 } 908 909 gsub(/[$][$]/,"$$",s) # change display math to triple dollars for split 910 n = split(s,parts,/[$]/)# split into non-math (odd) and math (even) parts 911 912 s = "" 913 for (k = 1; k <= n; ++k) # unbrace non-math part, leaving math mode intact 914 s = s ((k > 1) ? "$" : "") \ 915 ((k % 2) ? strip_braces(TeX_to_HTML_nonmath(parts[k])) : \ 916 TeX_to_HTML_math(parts[k])) 917 918 gsub(/[$][$][$]/,"$$",s) # restore display math 919 920 return (s) 921} 922 923 924function TeX_to_HTML_math(s) 925{ 926 # Mostly a dummy for now, but HTML 3 could support some math translation 927 928 gsub(/\\&/,"\\&",s) # reduce TeX ampersands to SGML entities 929 930 return (s) 931} 932 933 934function TeX_to_HTML_nonmath(s) 935{ 936 if (index(s,"\\") > 0) # important optimization 937 { 938 gsub(/\\slash +/,"/",s) # replace TeX slashes with conventional ones 939 gsub(/ *\\emdash +/," --- ",s) # replace BibNet emdashes with conventional ones 940 gsub(/\\%/,"%",s) # reduce TeX percents to conventional ones 941 gsub(/\\[$]/,"$",s) # reduce TeX dollars to conventional ones 942 gsub(/\\#/,"#",s) # reduce TeX sharps to conventional ones 943 944 if (HTML) # translate TeX markup to HTML 945 { 946 gsub(/\\&/,"\\&",s) # reduce TeX ampersands to SGML entities 947 s = html_accents(s) 948 s = html_fonts(s) 949 } 950 else # plain ASCII text output: discard all TeX markup 951 { 952 gsub(/\\\&/, "\\&", s) # reduce TeX ampersands to conventional ones 953 954 #gsub(/\\[a-z][a-z] +/,"",s) # remove TeX font changes 955 gsub(/\\[[:lower:]][[:lower:]] +/,"",s) # remove TeX font changes 956 #gsub(/\\[^A-Za-z]/,"",s) # remove remaining TeX control symbols 957 gsub(/\\[^[:alpha:]]/,"",s) # remove remaining TeX control symbols 958 } 959 } 960 return (s) 961} 962 963 964function trim(s) 965{ 966 gsub(/^[ \t]+/,"",s) 967 gsub(/[ \t]+$/,"",s) 968 return (s) 969} 970 971 972function vol_no_month_year() 973{ 974 return ("Volume " wrap(Volume) ", Number " wrap(Number) ", " wrap(Month) ", " wrap(Year)) 975} 976 977 978function wrap(value) 979{ 980 return (HTML ? ("<STRONG>" value "</STRONG>") : value) 981} 982