716 lines
19 KiB
C
716 lines
19 KiB
C
/* sectioning.c -- for @chapter, @section, ..., @contents ...
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$Id: sectioning.c,v 1.10 2003/05/13 16:37:54 karl Exp $
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Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Originally written by Karl Heinz Marbaise <kama@hippo.fido.de>. */
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#include "system.h"
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#include "cmds.h"
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#include "macro.h"
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#include "makeinfo.h"
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#include "node.h"
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#include "toc.h"
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#include "sectioning.h"
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#include "xml.h"
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/* See comment in sectioning.h. */
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section_alist_type section_alist[] = {
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{ "unnumberedsubsubsec", 5, ENUM_SECT_NO, TOC_YES },
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{ "unnumberedsubsec", 4, ENUM_SECT_NO, TOC_YES },
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{ "unnumberedsec", 3, ENUM_SECT_NO, TOC_YES },
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{ "unnumbered", 2, ENUM_SECT_NO, TOC_YES },
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{ "appendixsubsubsec", 5, ENUM_SECT_APP, TOC_YES }, /* numbered like A.X.X.X */
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{ "appendixsubsec", 4, ENUM_SECT_APP, TOC_YES },
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{ "appendixsec", 3, ENUM_SECT_APP, TOC_YES },
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{ "appendixsection", 3, ENUM_SECT_APP, TOC_YES },
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{ "appendix", 2, ENUM_SECT_APP, TOC_YES },
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{ "subsubsec", 5, ENUM_SECT_YES, TOC_YES },
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{ "subsubsection", 5, ENUM_SECT_YES, TOC_YES },
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{ "subsection", 4, ENUM_SECT_YES, TOC_YES },
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{ "section", 3, ENUM_SECT_YES, TOC_YES },
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{ "chapter", 2, ENUM_SECT_YES, TOC_YES },
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{ "subsubheading", 5, ENUM_SECT_NO, TOC_NO },
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{ "subheading", 4, ENUM_SECT_NO, TOC_NO },
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{ "heading", 3, ENUM_SECT_NO, TOC_NO },
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{ "chapheading", 2, ENUM_SECT_NO, TOC_NO },
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{ "majorheading", 2, ENUM_SECT_NO, TOC_NO },
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{ "top", 1, ENUM_SECT_NO, TOC_YES },
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{ NULL, 0, 0, 0 }
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};
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/* The argument of @settitle, used for HTML. */
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char *title = NULL;
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#define APPENDIX_MAGIC 1024
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#define UNNUMBERED_MAGIC 2048
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/* Number memory for every level @chapter, @section,
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@subsection, @subsubsection. */
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static int numbers [] = { 0, 0, 0, 0 };
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/* enum_marker == APPENDIX_MAGIC then we are counting appendencies
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enum_marker == UNNUMBERED_MAGIC then we are within unnumbered area.
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Handling situations like this:
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@unnumbered ..
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@section ... */
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static int enum_marker = 0;
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/* Organized by level commands. That is, "*" == chapter, "=" == section. */
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static char *scoring_characters = "*=-.";
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/* Amount to offset the name of sectioning commands to levels by. */
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static int section_alist_offset = 0;
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/* num == ENUM_SECT_NO means unnumbered (should never call this)
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num == ENUM_SECT_YES means numbered
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num == ENUM_SECT_APP means numbered like A.1 and so on */
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char *
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get_sectioning_number (level, num)
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int level;
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int num;
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{
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static char s[100]; /* should ever be enough for 99.99.99.99
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Appendix A.1 */
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char *p;
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int i;
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s[0] = 0;
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/* create enumeration in front of chapter, section, subsection and so on. */
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for (i = 0; i < level; i++)
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{
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p = s + strlen (s);
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if ((i == 0) && (enum_marker == APPENDIX_MAGIC))
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sprintf (p, "%c.", numbers[i] + 64); /* Should be changed to
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be more portable */
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else
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sprintf (p, "%d.", numbers[i]);
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}
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/* the last number is never followed by a dot */
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p = s + strlen (s);
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if ((num == ENUM_SECT_APP)
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&& (i == 0)
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&& (enum_marker == APPENDIX_MAGIC))
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sprintf (p, _("Appendix %c "), numbers[i] + 64);
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else
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sprintf (p, "%d ", numbers[i]);
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return s;
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}
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/* Set the level of @top to LEVEL. Return the old level of @top. */
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int
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set_top_section_level (level)
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int level;
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{
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int i, result = -1;
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for (i = 0; section_alist[i].name; i++)
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if (strcmp (section_alist[i].name, "top") == 0)
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{
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result = section_alist[i].level;
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section_alist[i].level = level;
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break;
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}
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return result;
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}
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/* return the index of the given sectioning command in section_alist */
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int
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search_sectioning (text)
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char *text;
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{
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int i;
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char *t;
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/* ignore the optional command prefix */
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if (text[0] == COMMAND_PREFIX)
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text++;
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for (i = 0; (t = section_alist[i].name); i++)
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{
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if (strcmp (t, text) == 0)
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{
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return i;
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}
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}
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return -1;
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}
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/* Return an integer which identifies the type section present in TEXT. */
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int
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what_section (text)
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char *text;
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{
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int index, j;
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char *temp;
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int return_val;
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find_section_command:
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for (j = 0; text[j] && cr_or_whitespace (text[j]); j++);
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if (text[j] != COMMAND_PREFIX)
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return -1;
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text = text + j + 1;
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/* We skip @c, @comment, and @?index commands. */
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if ((strncmp (text, "comment", strlen ("comment")) == 0) ||
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(text[0] == 'c' && cr_or_whitespace (text[1])) ||
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(strcmp (text + 1, "index") == 0))
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{
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while (*text++ != '\n');
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goto find_section_command;
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}
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/* Handle italicized sectioning commands. */
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if (*text == 'i')
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text++;
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for (j = 0; text[j] && !cr_or_whitespace (text[j]); j++);
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temp = xmalloc (1 + j);
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strncpy (temp, text, j);
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temp[j] = 0;
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index = search_sectioning (temp);
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free (temp);
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if (index >= 0)
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{
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return_val = section_alist[index].level + section_alist_offset;
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if (return_val < 0)
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return_val = 0;
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else if (return_val > 5)
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return_val = 5;
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return return_val;
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}
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return -1;
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}
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void
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sectioning_underscore (cmd)
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char *cmd;
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{
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/* If we're not indenting the first paragraph, we shall make it behave
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like @noindent is called directly after the section heading. */
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if (! do_first_par_indent)
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cm_noindent ();
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if (xml)
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{
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char *temp;
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int level;
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temp = xmalloc (2 + strlen (cmd));
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temp[0] = COMMAND_PREFIX;
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strcpy (&temp[1], cmd);
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level = what_section (temp);
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level -= 2;
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free (temp);
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xml_close_sections (level);
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/* Mark the beginning of the section
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If the next command is printindex, we will remove
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the section and put an Index instead */
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flush_output ();
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xml_last_section_output_position = output_paragraph_offset;
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xml_insert_element (xml_element (cmd), START);
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xml_insert_element (TITLE, START);
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xml_open_section (level, cmd);
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get_rest_of_line (0, &temp);
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execute_string ("%s\n", temp);
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free (temp);
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xml_insert_element (TITLE, END);
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}
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else
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{
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char character;
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char *temp;
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int level;
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temp = xmalloc (2 + strlen (cmd));
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temp[0] = COMMAND_PREFIX;
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strcpy (&temp[1], cmd);
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level = what_section (temp);
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free (temp);
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level -= 2;
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if (level < 0)
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level = 0;
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if (html)
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sectioning_html (level, cmd);
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else
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{
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character = scoring_characters[level];
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insert_and_underscore (level, character, cmd);
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}
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}
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}
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/* insert_and_underscore and sectioning_html are the
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only functions which call this.
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I have created this, because it was exactly the same
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code in both functions. */
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static char *
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handle_enum_increment (level, index)
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int level;
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int index;
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{
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/* special for unnumbered */
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if (number_sections && section_alist[index].num == ENUM_SECT_NO)
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{
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if (level == 0
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&& enum_marker != UNNUMBERED_MAGIC)
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enum_marker = UNNUMBERED_MAGIC;
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}
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/* enumerate only things which are allowed */
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if (number_sections && section_alist[index].num)
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{
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/* reset the marker if we get into enumerated areas */
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if (section_alist[index].num == ENUM_SECT_YES
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&& level == 0
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&& enum_marker == UNNUMBERED_MAGIC)
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enum_marker = 0;
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/* This is special for appendix; if we got the first
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time an appendix command then we are entering appendix.
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Thats the point we have to start countint with A, B and so on. */
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if (section_alist[index].num == ENUM_SECT_APP
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&& level == 0
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&& enum_marker != APPENDIX_MAGIC)
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{
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enum_marker = APPENDIX_MAGIC;
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numbers [0] = 0; /* this means we start with Appendix A */
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}
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/* only increment counters if we are not in unnumbered
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area. This handles situations like this:
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@unnumbered .... This sets enum_marker to UNNUMBERED_MAGIC
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@section .... */
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if (enum_marker != UNNUMBERED_MAGIC)
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{
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int i;
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/* reset all counters which are one level deeper */
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for (i = level; i < 3; i++)
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numbers [i + 1] = 0;
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numbers[level]++;
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return xstrdup
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(get_sectioning_number (level, section_alist[index].num));
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}
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} /* if (number_sections)... */
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return xstrdup ("");
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}
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/* Insert the text following input_text_offset up to the end of the line
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in a new, separate paragraph. Directly underneath it, insert a
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line of WITH_CHAR, the same length of the inserted text. */
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void
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insert_and_underscore (level, with_char, cmd)
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int level;
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int with_char;
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char *cmd;
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{
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int i, len;
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int index;
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int old_no_indent;
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unsigned char *starting_pos, *ending_pos;
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char *temp;
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close_paragraph ();
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filling_enabled = indented_fill = 0;
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old_no_indent = no_indent;
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no_indent = 1;
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if (macro_expansion_output_stream && !executing_string)
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append_to_expansion_output (input_text_offset + 1);
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get_rest_of_line (0, &temp);
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starting_pos = output_paragraph + output_paragraph_offset;
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index = search_sectioning (cmd);
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if (index < 0)
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{
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/* should never happen, but a poor guy, named Murphy ... */
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warning (_("Internal error (search_sectioning) \"%s\"!"), cmd);
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return;
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}
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/* This is a bit tricky: we must produce "X.Y SECTION-NAME" in the
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Info output and in TOC, but only SECTION-NAME in the macro-expanded
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output. */
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/* Step 1: produce "X.Y" and add it to Info output. */
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add_word (handle_enum_increment (level, index));
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/* Step 2: add "SECTION-NAME" to both Info and macro-expanded output. */
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if (macro_expansion_output_stream && !executing_string)
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{
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char *temp1 = xmalloc (2 + strlen (temp));
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sprintf (temp1, "%s\n", temp);
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remember_itext (input_text, input_text_offset);
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me_execute_string (temp1);
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free (temp1);
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}
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else
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execute_string ("%s\n", temp);
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/* Step 3: pluck "X.Y SECTION-NAME" from the output buffer and
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insert it into the TOC. */
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ending_pos = output_paragraph + output_paragraph_offset;
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if (section_alist[index].toc == TOC_YES)
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toc_add_entry (substring (starting_pos, ending_pos - 1),
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level, current_node, NULL);
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free (temp);
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len = (ending_pos - starting_pos) - 1;
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for (i = 0; i < len; i++)
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add_char (with_char);
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insert ('\n');
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close_paragraph ();
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filling_enabled = 1;
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no_indent = old_no_indent;
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}
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/* Insert the text following input_text_offset up to the end of the
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line as an HTML heading element of the appropriate `level' and
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tagged as an anchor for the current node.. */
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void
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sectioning_html (level, cmd)
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int level;
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char *cmd;
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{
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static int toc_ref_count = 0;
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int index;
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int old_no_indent;
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unsigned char *starting_pos, *ending_pos;
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char *temp, *toc_anchor = NULL;
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close_paragraph ();
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filling_enabled = indented_fill = 0;
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old_no_indent = no_indent;
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no_indent = 1;
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/* level 0 (chapter) is <h2>, everything else is <h3>. We don't want
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to go lower than that because browsers then start rendering the
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headings smaller than the text. */
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add_word_args ("<h%d class=\"%s\">", MIN (3, level + 2), cmd);
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/* If we are outside of any node, produce an anchor that
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the TOC could refer to. */
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if (!current_node || !*current_node)
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{
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static const char a_name[] = "<a name=\"";
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starting_pos = output_paragraph + output_paragraph_offset;
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add_word_args ("%sTOC%d\">", a_name, toc_ref_count++);
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toc_anchor = substring (starting_pos + sizeof (a_name) - 1,
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output_paragraph + output_paragraph_offset);
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/* This must be added after toc_anchor is extracted, since
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toc_anchor cannot include the closing </a>. For details,
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see toc.c:toc_add_entry and toc.c:contents_update_html.
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Also, the anchor close must be output before the section name
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in case the name itself contains an anchor. */
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add_word ("</a>");
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}
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starting_pos = output_paragraph + output_paragraph_offset;
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if (macro_expansion_output_stream && !executing_string)
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append_to_expansion_output (input_text_offset + 1);
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get_rest_of_line (0, &temp);
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index = search_sectioning (cmd);
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if (index < 0)
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{
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/* should never happen, but a poor guy, named Murphy ... */
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warning (_("Internal error (search_sectioning) \"%s\"!"), cmd);
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return;
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}
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/* Produce "X.Y" and add it to HTML output. */
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add_word (handle_enum_increment (level, index));
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/* add the section name to both HTML and macro-expanded output. */
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if (macro_expansion_output_stream && !executing_string)
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{
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remember_itext (input_text, input_text_offset);
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me_execute_string (temp);
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write_region_to_macro_output ("\n", 0, 1);
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}
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else
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execute_string ("%s", temp);
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ending_pos = output_paragraph + output_paragraph_offset;
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/* Pluck ``X.Y SECTION-NAME'' from the output buffer and insert it
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into the TOC. */
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if (section_alist[index].toc == TOC_YES)
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toc_add_entry (substring (starting_pos, ending_pos),
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level, current_node, toc_anchor);
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free (temp);
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if (outstanding_node)
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outstanding_node = 0;
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add_word_args ("</h%d>", level + 2);
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close_paragraph();
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filling_enabled = 1;
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no_indent = old_no_indent;
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}
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/* Shift the meaning of @section to @chapter. */
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void
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cm_raisesections ()
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{
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discard_until ("\n");
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section_alist_offset--;
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}
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/* Shift the meaning of @chapter to @section. */
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void
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cm_lowersections ()
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{
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discard_until ("\n");
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section_alist_offset++;
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}
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/* The command still works, but prints a warning message in addition. */
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void
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cm_ideprecated (arg, start, end)
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int arg, start, end;
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{
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warning (_("%c%s is obsolete; use %c%s instead"),
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COMMAND_PREFIX, command, COMMAND_PREFIX, command + 1);
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sectioning_underscore (command + 1);
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}
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/* Treat this just like @unnumbered. The only difference is
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in node defaulting. */
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void
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cm_top ()
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{
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/* It is an error to have more than one @top. */
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if (top_node_seen && strcmp (current_node, "Top") != 0)
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{
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TAG_ENTRY *tag = tag_table;
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||
line_error (_("Node with %ctop as a section already exists"),
|
||
COMMAND_PREFIX);
|
||
|
||
while (tag)
|
||
{
|
||
if (tag->flags & TAG_FLAG_IS_TOP)
|
||
{
|
||
file_line_error (tag->filename, tag->line_no,
|
||
_("Here is the %ctop node"), COMMAND_PREFIX);
|
||
return;
|
||
}
|
||
tag = tag->next_ent;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
top_node_seen = 1;
|
||
|
||
/* It is an error to use @top before using @node. */
|
||
if (!tag_table)
|
||
{
|
||
char *top_name;
|
||
|
||
get_rest_of_line (0, &top_name);
|
||
line_error (_("%ctop used before %cnode, defaulting to %s"),
|
||
COMMAND_PREFIX, COMMAND_PREFIX, top_name);
|
||
execute_string ("@node Top, , (dir), (dir)\n@top %s\n", top_name);
|
||
free (top_name);
|
||
return;
|
||
}
|
||
|
||
cm_unnumbered ();
|
||
|
||
/* The most recently defined node is the top node. */
|
||
tag_table->flags |= TAG_FLAG_IS_TOP;
|
||
|
||
/* Now set the logical hierarchical level of the Top node. */
|
||
{
|
||
int orig_offset = input_text_offset;
|
||
|
||
input_text_offset = search_forward (node_search_string, orig_offset);
|
||
|
||
if (input_text_offset > 0)
|
||
{
|
||
int this_section;
|
||
|
||
/* We have encountered a non-top node, so mark that one exists. */
|
||
non_top_node_seen = 1;
|
||
|
||
/* Move to the end of this line, and find out what the
|
||
sectioning command is here. */
|
||
while (input_text[input_text_offset] != '\n')
|
||
input_text_offset++;
|
||
|
||
if (input_text_offset < input_text_length)
|
||
input_text_offset++;
|
||
|
||
this_section = what_section (input_text + input_text_offset);
|
||
|
||
/* If we found a sectioning command, then give the top section
|
||
a level of this section - 1. */
|
||
if (this_section != -1)
|
||
set_top_section_level (this_section - 1);
|
||
}
|
||
input_text_offset = orig_offset;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* The remainder of the text on this line is a chapter heading. */
|
||
void
|
||
cm_chapter ()
|
||
{
|
||
sectioning_underscore ("chapter");
|
||
}
|
||
|
||
/* The remainder of the text on this line is a section heading. */
|
||
void
|
||
cm_section ()
|
||
{
|
||
sectioning_underscore ("section");
|
||
}
|
||
|
||
/* The remainder of the text on this line is a subsection heading. */
|
||
void
|
||
cm_subsection ()
|
||
{
|
||
sectioning_underscore ("subsection");
|
||
}
|
||
|
||
/* The remainder of the text on this line is a subsubsection heading. */
|
||
void
|
||
cm_subsubsection ()
|
||
{
|
||
sectioning_underscore ("subsubsection");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an unnumbered heading. */
|
||
void
|
||
cm_unnumbered ()
|
||
{
|
||
sectioning_underscore ("unnumbered");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an unnumbered section heading. */
|
||
void
|
||
cm_unnumberedsec ()
|
||
{
|
||
sectioning_underscore ("unnumberedsec");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an unnumbered
|
||
subsection heading. */
|
||
void
|
||
cm_unnumberedsubsec ()
|
||
{
|
||
sectioning_underscore ("unnumberedsubsec");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an unnumbered
|
||
subsubsection heading. */
|
||
void
|
||
cm_unnumberedsubsubsec ()
|
||
{
|
||
sectioning_underscore ("unnumberedsubsubsec");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an appendix heading. */
|
||
void
|
||
cm_appendix ()
|
||
{
|
||
sectioning_underscore ("appendix");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an appendix section heading. */
|
||
void
|
||
cm_appendixsec ()
|
||
{
|
||
sectioning_underscore ("appendixsec");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an appendix subsection heading. */
|
||
void
|
||
cm_appendixsubsec ()
|
||
{
|
||
sectioning_underscore ("appendixsubsec");
|
||
}
|
||
|
||
/* The remainder of the text on this line is an appendix
|
||
subsubsection heading. */
|
||
void
|
||
cm_appendixsubsubsec ()
|
||
{
|
||
sectioning_underscore ("appendixsubsubsec");
|
||
}
|
||
|
||
/* Compatibility functions substitute for chapter, section, etc. */
|
||
void
|
||
cm_majorheading ()
|
||
{
|
||
sectioning_underscore ("majorheading");
|
||
}
|
||
|
||
void
|
||
cm_chapheading ()
|
||
{
|
||
sectioning_underscore ("chapheading");
|
||
}
|
||
|
||
void
|
||
cm_heading ()
|
||
{
|
||
sectioning_underscore ("heading");
|
||
}
|
||
|
||
void
|
||
cm_subheading ()
|
||
{
|
||
sectioning_underscore ("subheading");
|
||
}
|
||
|
||
void
|
||
cm_subsubheading ()
|
||
{
|
||
sectioning_underscore ("subsubheading");
|
||
}
|