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<?xml version="1.0" encoding="UTF-8"?>
<!--

 This file is part of GtkSourceView

 Authors: Marco Barisione, Emanuele Aina
 Copyright (C) 2005-2007 Marco Barisione <barisione@gmail.com>
 Copyright (C) 2005-2007 Emanuele Aina

 GtkSourceView is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 GtkSourceView is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this library; if not, see <http://www.gnu.org/licenses/>.

-->
<language id="c" name="C" version="2.0" _section="Source">
  <metadata>
    <property name="mimetypes">text/x-c;text/x-csrc;image/x-xpixmap</property>
    <property name="globs">*.c</property>
    <property name="line-comment-start">//</property>
    <property name="block-comment-start">/*</property>
    <property name="block-comment-end">*/</property>
    <property name="suggested-suffix">.c</property>
  </metadata>

  <styles>
    <style id="comment"                name="Comment"                map-to="def:comment"/>
    <style id="string"                 name="String"                 map-to="def:string"/>
    <style id="preprocessor"           name="Preprocessor"           map-to="def:preprocessor"/>
    <style id="common-defines"         name="Common Defines"         map-to="def:special-constant"/>
    <style id="included-file"          name="Included File"          map-to="def:string"/>
    <style id="included-relative-file" name="Included Relative File" map-to="c:included-file"/>
    <style id="char"                   name="Character"              map-to="def:character"/>
    <style id="keyword"                name="Keyword"                map-to="def:keyword"/>
    <style id="type-keyword"           name="Type Keyword"           map-to="c:keyword"/>
    <style id="operator"               name="Operator"               map-to="def:operator"/>
    <style id="type"                   name="Data Type"              map-to="def:type"/>
    <style id="storage-class"          name="Storage Class"          map-to="def:type"/>
    <style id="printf"                 name="printf Conversion"      map-to="def:special-char"/>
    <style id="escaped-character"      name="Escaped Character"      map-to="def:special-char"/>
    <style id="floating-point"         name="Floating point number"  map-to="def:floating-point"/>
    <style id="decimal"                name="Decimal number"         map-to="def:decimal"/>
    <style id="binary"                 name="Binary number"          map-to="def:base-n-integer"/>
    <style id="octal"                  name="Octal number"           map-to="def:base-n-integer"/>
    <style id="hexadecimal"            name="Hexadecimal number"     map-to="def:base-n-integer"/>
    <style id="boolean"                name="Boolean value"          map-to="def:boolean"/>
    <style id="nullptr"                name="Null Pointer Value"     map-to="def:special-constant"/>
    <style id="standard-stream"        name="Standard stream"        map-to="def:constant"/>
    <style id="signal-name"            name="Signal name"            map-to="def:constant"/>
    <style id="error"                  name="Error"                  map-to="def:error"/>
  </styles>

  <definitions>

    <!--regexs-->
    <define-regex id="preproc-start">^\s*#\s*</define-regex>
    <define-regex id="escaped-character" extended="true">
      \\(                   # leading backslash
      [\\\"\'nrbtfav\?] |   # escaped character
      [0-7]{1,3} |          # one, two, or three octal digits
      x[0-9A-Fa-f]+ |       # 'x' followed by hex digits
      u[0-9A-Fa-f]{4} |     # 'u' followed by 4 hex digits
      U[0-9A-Fa-f]{8}       # 'U' followed by 8 hex digits
      )
    </define-regex>
    <define-regex id="integer-suffix">(?:ll?|LL?)[uU]|[uU]?(?:ll?|LL?)|[uU]?</define-regex>

    <!--contexts NOT used on the main context-->
    <!-- TODO: what about scanf? -->
    <!-- man 3 printf -->
    <context id="printf" style-ref="printf" extend-parent="false">
      <match extended="true">
        \%\%|\%
        (?:[1-9][0-9]*\$)?        # argument
        [#0\-\ \+\'I]*            # flags
        (?:[1-9][0-9]*|\*)?       # width
        (?:\.\-?(?:[0-9]+|\*))?   # precision
        (?:hh|ll|[hlLqjzt])?      # length modifier
        ([diouxXeEfFgGaAcsCSpnm]| # conversion specifier
          \[\^?\]?[^\]]*\])         # specific to scanf
      </match>
    </context>

    <!--contexts used on the main context-->
    <!-- Preprocessor -->
    <context id="if0-comment" style-ref="comment">
      <start>\%{preproc-start}if\b\s*0\b</start>
      <end>\%{preproc-start}(endif|else|elif)\b</end>
      <include>
        <context id="if-in-if0">
          <start>\%{preproc-start}if(n?def)?\b</start>
          <end>\%{preproc-start}endif\b</end>
          <include>
            <context ref="if-in-if0"/>
            <context ref="def:in-comment"/>
          </include>
        </context>
        <context ref="def:in-comment"/>
      </include>
    </context>

    <context id="include-relative" end-at-line-end="true">
      <start extended="true">
        (\%{preproc-start}(include|import))\s*
        (".*?")
      </start>
      <include>
        <context sub-pattern="1" where="start" style-ref="preprocessor"/>
        <context id="included-relative-file" sub-pattern="3" where="start" style-ref="included-relative-file" class="path"/>
        <context ref="def:line-continue"/>
        <context ref="def:c-like-comment"/>
        <context ref="def:c-like-comment-multiline"/>
      </include>
    </context>
    <context id="include" end-at-line-end="true">
      <start extended="true">
        (\%{preproc-start}(include|import))\s*
        (&lt;.*?&gt;)?
      </start>
      <include>
        <context sub-pattern="1" where="start" style-ref="preprocessor"/>
        <context id="included-file" sub-pattern="3" where="start" style-ref="included-file" class="path"/>
        <context ref="def:line-continue"/>
        <context ref="def:c-like-comment"/>
        <context ref="def:c-like-comment-multiline"/>
      </include>
    </context>

    <context id="preprocessor-with-c-code" end-at-line-end="true">
      <start extended="true">
        \%{preproc-start}
          ((el)?if|
            define(\s+\w+(\([^)]*\)?)?)?
          )
      </start>
      <include>
        <context sub-pattern="0" where="start" style-ref="preprocessor"/>
        <context ref="def:line-continue"/>
        <context ref="comments:*"/>
        <context ref="no-preprocessor:*"/>
      </include>
    </context>

    <context id="preprocessor" end-at-line-end="true">
      <start extended="true">
        (\%{preproc-start}
          (undef|pragma|ident|(el)?ifn?def|else|endif|line|error|warning|embed)
        )\b
      </start>
      <include>
        <context sub-pattern="1" where="start" style-ref="preprocessor"/>
        <context ref="def:line-continue"/>
        <context ref="comments:*"/>
        <context ref="string"/>
      </include>
    </context>

    <context id="misplaced-char" style-ref="error">
      <match>[#\\]</match>
    </context>

    <context id="string" style-ref="string" end-at-line-end="true" class="string" class-disabled="no-spell-check">
      <start>(L|u8|u|U)?"</start>
      <end>"</end>
      <include>
        <context ref="printf"/>
        <context id="escaped-character" style-ref="escaped-character">
          <match>\%{escaped-character}</match>
        </context>
        <context ref="def:line-continue"/>
      </include>
    </context>

    <context id="char" style-ref="char" class="string">
      <match>(L|u8|u|U)?'(\%{escaped-character}|.)'</match>
    </context>

    <!-- http://www.lysator.liu.se/c/ANSI-C-grammar-l.html -->
    <context id="float">
      <match extended="true" case-sensitive="false">
        (?&lt;![\w\.])
        (((\.\d+ | \d+\.\d*) (e[+-]?\d+)? |
          (\d+e[+-]?\d+) |
          (0x[a-f\d]*\.?[a-f\d]*p[+-]?\d+))
         [fl]?)
        (\w*)
      </match>
      <include>
        <context sub-pattern="1" style-ref="floating-point"/>
        <context sub-pattern="7" style-ref="error"/>
      </include>
    </context>

    <context id="hexadecimal">
      <match extended="true" case-sensitive="false">
        (?&lt;![\w\.])
        (0x[a-f\d]+\%{integer-suffix})
        (\w*)
      </match>
      <include>
        <context sub-pattern="1" style-ref="hexadecimal"/>
        <context sub-pattern="2" style-ref="error"/>
      </include>
    </context>

    <context id="octal">
      <match extended="true">
        (?&lt;![\w\.])
        (0[0-7]+\%{integer-suffix})
        (\w*)
      </match>
      <include>
        <context sub-pattern="1" style-ref="octal"/>
        <context sub-pattern="2" style-ref="error"/>
      </include>
    </context>

    <context id="binary">
      <match extended="true">
        (?&lt;![\w\.])
        (0[bB][01]+\%{integer-suffix})
        (\w*)
      </match>
      <include>
        <context sub-pattern="1" style-ref="binary"/>
        <context sub-pattern="2" style-ref="error"/>
      </include>
    </context>

    <context id="decimal">
      <match extended="true">
        (?&lt;![\w\.])
        ((?:0|[1-9]\d*)\%{integer-suffix})
        (\w*)
      </match>
      <include>
        <context sub-pattern="1" style-ref="decimal"/>
        <context sub-pattern="2" style-ref="error"/>
      </include>
    </context>

    <context id="keywords" style-ref="keyword">
      <keyword>asm</keyword>
      <keyword>break</keyword>
      <keyword>case</keyword>
      <keyword>constexpr</keyword>
      <keyword>continue</keyword>
      <keyword>default</keyword>
      <keyword>do</keyword>
      <keyword>else</keyword>
      <keyword>for</keyword>
      <keyword>fortran</keyword>
      <keyword>goto</keyword>
      <keyword>if</keyword>
      <keyword>return</keyword>
      <keyword>switch</keyword>
      <keyword>while</keyword>
    </context>

    <context id="type-keywords" style-ref="type-keyword">
      <keyword>enum</keyword>
      <keyword>struct</keyword>
      <keyword>typedef</keyword>
      <keyword>union</keyword>
    </context>

    <context id="operators" style-ref="operator">
      <keyword>(_A|a)lignof</keyword>
      <keyword>defined</keyword>
      <keyword>_Generic</keyword>
      <keyword>offsetof</keyword>
      <keyword>_Pragma</keyword>
      <keyword>sizeof</keyword>
      <keyword>(_S|s)tatic_assert</keyword>
      <keyword>typeof</keyword>
    </context>

    <context id="types" style-ref="type">
      <keyword>(_B|b)ool</keyword>
      <keyword>_Complex</keyword>
      <keyword>_Imaginary</keyword>
      <keyword>char</keyword>
      <keyword>double</keyword>
      <keyword>float</keyword>
      <keyword>int</keyword>
      <keyword>long</keyword>
      <keyword>short</keyword>
      <keyword>signed</keyword>
      <keyword>unsigned</keyword>
      <keyword>va_list</keyword>
      <keyword>void</keyword>
      <keyword>[a-z_][0-9a-z_]+(_t|_T)</keyword>
    </context>

    <context id="storage-class" style-ref="storage-class">
      <keyword>(_A|a)lignas</keyword>
      <keyword>_Atomic</keyword>
      <keyword>(_N|n)oreturn</keyword>
      <keyword>(_T|t)hread_local</keyword>
      <keyword>auto</keyword>
      <keyword>const</keyword>
      <keyword>extern</keyword>
      <keyword>inline</keyword>
      <keyword>register</keyword>
      <keyword>restrict</keyword>
      <keyword>static</keyword>
      <keyword>volatile</keyword>
    </context>

    <!-- C99 booleans -->
    <context id="boolean" style-ref="boolean">
      <keyword>true</keyword>
      <keyword>false</keyword>
    </context>

    <context id="nullptr" style-ref="nullptr">
      <keyword>nullptr</keyword>
    </context>

    <context id="common-defines" style-ref="common-defines">
      <keyword>NULL</keyword>
      <keyword>MAX</keyword>
      <keyword>MIN</keyword>
      <keyword>TRUE</keyword>
      <keyword>FALSE</keyword>
      <keyword>__LINE__</keyword>
      <keyword>__DATE__</keyword>
      <keyword>__FILE__</keyword>
      <keyword>__func__</keyword>
      <keyword>__TIME__</keyword>
      <keyword>__STDC(_VERSION)?__</keyword>
      <keyword>__VA_ARGS__</keyword>
    </context>

    <context id="standard-streams" style-ref="standard-stream">
      <keyword>stdin</keyword>
      <keyword>stdout</keyword>
      <keyword>stderr</keyword>
    </context>

    <context id="signals" style-ref="signal-name">
      <keyword>SIGABRT</keyword>
      <keyword>SIGALRM</keyword>
      <keyword>SIGCHLD</keyword>
      <keyword>SIGCONT</keyword>
      <keyword>SIGFPE</keyword>
      <keyword>SIGHUP</keyword>
      <keyword>SIGILL</keyword>
      <keyword>SIGINT</keyword>
      <keyword>SIGKILL</keyword>
      <keyword>SIGPIPE</keyword>
      <keyword>SIGQUIT</keyword>
      <keyword>SIGSEGV</keyword>
      <keyword>SIGSTOP</keyword>
      <keyword>SIGTERM</keyword>
      <keyword>SIGTRAP</keyword>
      <keyword>SIGTSTP</keyword>
      <keyword>SIGTTIN</keyword>
      <keyword>SIGTTOU</keyword>
      <keyword>SIGUSR1</keyword>
      <keyword>SIGUSR2</keyword>
    </context>

    <context id="comments">
      <include>
        <context ref="gtk-doc:inline-docs-section"/>
        <context ref="def:c-like-comment" style-ref="comment"/>
        <context ref="def:c-like-comment-multiline" style-ref="comment"/>
        <context ref="def:c-like-close-comment-outside-comment" style-ref="error"/>
      </include>
    </context>

    <context id="no-preprocessor">
      <include>
        <context ref="string"/>
        <context ref="char"/>
        <context ref="float"/>
        <context ref="hexadecimal"/>
        <context ref="octal"/>
        <context ref="binary"/>
        <context ref="decimal"/>
        <context ref="keywords"/>
        <context ref="type-keywords"/>
        <context ref="operators"/>
        <context ref="types"/>
        <context ref="storage-class"/>
        <context ref="boolean"/>
        <context ref="nullptr"/>
        <context ref="common-defines"/>
        <context ref="standard-streams"/>
        <context ref="signals"/>
      </include>
    </context>

    <!--Main context-->
    <context id="c" class="no-spell-check">
      <include>
        <context ref="def:line-continue" ignore-style="true"/>
        <context ref="comments:*"/>
        <context ref="if0-comment"/>
        <context ref="include-relative"/>
        <context ref="include"/>
        <context ref="preprocessor"/>
        <context ref="preprocessor-with-c-code"/>
        <context ref="no-preprocessor:*"/>
        <context ref="misplaced-char"/>
      </include>
    </context>

  </definitions>
</language>

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