/usr/share/gtksourceview-2.0/language-specs/c.lang is in libgtksourceview2.0-common 2.10.5-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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<!--
Authors: Marco Barisione, Emanuele Aina
Copyright (C) 2005-2007 Marco Barisione <barisione@gmail.com>
Copyright (C) 2005-2007 Emanuele Aina
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
-->
<language id="c" _name="C" version="2.0" _section="Sources">
<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>
</metadata>
<styles>
<style id="comment" _name="Comment" map-to="def:comment"/>
<style id="error" _name="Error" map-to="def:error"/>
<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="char" _name="Character" map-to="def:character"/>
<style id="keyword" _name="Keyword" map-to="def:keyword"/>
<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="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"/>
</styles>
<definitions>
<!-- 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
</match>
</context>
<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
)
</define-regex>
<context id="c" class="no-spell-check">
<include>
<!-- gtk-doc -->
<context ref="gtk-doc:inline-docs-section"/>
<!-- Comments -->
<context id="comment" style-ref="comment" end-at-line-end="true" class="comment" class-disabled="no-spell-check">
<start>//</start>
<include>
<context ref="def:in-line-comment"/>
</include>
</context>
<context id="comment-multiline" style-ref="comment" class="comment" class-disabled="no-spell-check">
<start>/\*</start>
<end>\*/</end>
<include>
<context ref="def:in-comment"/>
</include>
</context>
<context id="close-comment-outside-comment" style-ref="error">
<match>\*/(?!\*)</match>
</context>
<!-- Preprocessor -->
<define-regex id="preproc-start">^\s*#\s*</define-regex>
<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" style-ref="preprocessor">
<match extended="true">
\%{preproc-start}
(include|import)\s*
(".*?"|<.*>)
</match>
<include>
<context id="included-file" sub-pattern="2" style-ref="included-file"/>
</include>
</context>
<context id="preprocessor" style-ref="preprocessor" end-at-line-end="true">
<start extended="true">
\%{preproc-start}
(define|undef|error|pragma|ident|if(n?def)?|else|elif|endif|line|warning)
\b
</start>
<include>
<context ref="def:line-continue" ignore-style="true"/>
<context ref="string" ignore-style="true"/>
<context ref="comment"/>
<context ref="comment-multiline"/>
</include>
</context>
<context id="string" style-ref="string" end-at-line-end="true" class="string" class-disabled="no-spell-check">
<start>L?"</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">
<match>L?'(\%{escaped-character}|.)'</match>
</context>
<!-- http://www.lysator.liu.se/c/ANSI-C-grammar-l.html -->
<context id="float" style-ref="floating-point">
<match extended="true">
(?<![\w\.])
((\.[0-9]+ | [0-9]+\.[0-9]*) ([Ee][+-]?[0-9]*)? |
([0-9]+[Ee][+-]?[0-9]*))
[fFlL]?
(?![\w\.])
</match>
</context>
<context id="hexadecimal" style-ref="hexadecimal">
<match extended="true">
(?<![\w\.])
0[xX][a-fA-F0-9]+[uUlL]*
(?![\w\.])
</match>
</context>
<context id="octal" style-ref="octal">
<match extended="true">
(?<![\w\.])
0[0-7]+[uUlL]*
(?![\w\.])
</match>
</context>
<context id="decimal" style-ref="decimal">
<match extended="true">
(?<![\w\.])
[0-9]+[uUlL]*
(?![\w\.])
</match>
</context>
<!-- Keywords -->
<context id="keywords" style-ref="keyword" class="keyword">
<keyword>asm</keyword>
<keyword>break</keyword>
<keyword>case</keyword>
<keyword>continue</keyword>
<keyword>default</keyword>
<keyword>do</keyword>
<keyword>else</keyword>
<keyword>enum</keyword>
<keyword>for</keyword>
<keyword>fortran</keyword>
<keyword>goto</keyword>
<keyword>if</keyword>
<keyword>return</keyword>
<keyword>sizeof</keyword>
<keyword>struct</keyword>
<keyword>switch</keyword>
<keyword>typedef</keyword>
<keyword>union</keyword>
<keyword>while</keyword>
</context>
<context id="types" style-ref="type" class="type">
<keyword>_Bool</keyword>
<keyword>_Complex</keyword>
<keyword>_Imaginary</keyword>
<keyword>bool</keyword>
<keyword>char</keyword>
<keyword>double</keyword>
<keyword>float</keyword>
<keyword>int</keyword>
<keyword>long</keyword>
<keyword>short</keyword>
<keyword>signed</keyword>
<keyword>size_t</keyword>
<keyword>unsigned</keyword>
<keyword>void</keyword>
</context>
<context id="storage-class" style-ref="storage-class" class="storage-class">
<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>
<context id="common-defines" style-ref="common-defines" class="common-defines">
<keyword>NULL</keyword>
<keyword>MAX</keyword>
<keyword>MIN</keyword>
<keyword>TRUE</keyword>
<keyword>FALSE</keyword>
<keyword>__LINE__</keyword>
<keyword>__DATA__</keyword>
<keyword>__FILE__</keyword>
<keyword>__func__</keyword>
<keyword>__TIME__</keyword>
<keyword>__STDC__</keyword>
</context>
<!-- C99 booleans -->
<context id="boolean" style-ref="boolean" class="boolean">
<keyword>true</keyword>
<keyword>false</keyword>
</context>
</include>
</context>
</definitions>
</language>
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