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<html lang="en">
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<title>Characters implementation - Using the GNU Compiler Collection (GCC)</title>
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<a name="Characters-implementation"></a>
Next: <a rel="next" accesskey="n" href="Integers-implementation.html#Integers-implementation">Integers implementation</a>,
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<h3 class="section">4.4 Characters</h3>
<ul>
<li><cite>The number of bits in a byte (C90 3.4, C99 3.6).</cite>
<p>Determined by ABI.
<li><cite>The values of the members of the execution character set (C90
and C99 5.2.1).</cite>
<p>Determined by ABI.
<li><cite>The unique value of the member of the execution character set produced
for each of the standard alphabetic escape sequences (C90 and C99 5.2.2).</cite>
<p>Determined by ABI.
<li><cite>The value of a </cite><code>char</code><cite> object into which has been stored any
character other than a member of the basic execution character set
(C90 6.1.2.5, C99 6.2.5).</cite>
<p>Determined by ABI.
<li><cite>Which of </cite><code>signed char</code><cite> or </cite><code>unsigned char</code><cite> has the same
range, representation, and behavior as “plain” </cite><code>char</code><cite> (C90
6.1.2.5, C90 6.2.1.1, C99 6.2.5, C99 6.3.1.1).</cite>
<p><a name="index-fsigned_002dchar-1714"></a><a name="index-funsigned_002dchar-1715"></a>Determined by ABI. The options <samp><span class="option">-funsigned-char</span></samp> and
<samp><span class="option">-fsigned-char</span></samp> change the default. See <a href="C-Dialect-Options.html#C-Dialect-Options">Options Controlling C Dialect</a>.
<li><cite>The mapping of members of the source character set (in character
constants and string literals) to members of the execution character
set (C90 6.1.3.4, C99 6.4.4.4, C90 and C99 5.1.1.2).</cite>
<p>Determined by ABI.
<li><cite>The value of an integer character constant containing more than one
character or containing a character or escape sequence that does not map
to a single-byte execution character (C90 6.1.3.4, C99 6.4.4.4).</cite>
<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
<li><cite>The value of a wide character constant containing more than one
multibyte character, or containing a multibyte character or escape
sequence not represented in the extended execution character set (C90
6.1.3.4, C99 6.4.4.4).</cite>
<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
<li><cite>The current locale used to convert a wide character constant consisting
of a single multibyte character that maps to a member of the extended
execution character set into a corresponding wide character code (C90
6.1.3.4, C99 6.4.4.4).</cite>
<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
<li><cite>The current locale used to convert a wide string literal into
corresponding wide character codes (C90 6.1.4, C99 6.4.5).</cite>
<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
<li><cite>The value of a string literal containing a multibyte character or escape
sequence not represented in the execution character set (C90 6.1.4, C99 6.4.5).</cite>
<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
</ul>
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