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Vxworks API操作系统和驱动程序设计API。压缩的HTML文件

<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>isprint(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>isprint(&nbsp;)</strong> - test whether a character is printable, including the space character (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int isprint
    (
    int c                     /* character to test */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine returns true if <i>c</i> is a printing character or the space
character.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
Non-zero if and only if <i>c</i> is printable, including the space
character.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="ispunct"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>ispunct(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>ispunct(&nbsp;)</strong> - test whether a character is punctuation (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int ispunct
    (
    int c                     /* character to test */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine tests whether a character is punctuation, i.e., a printing
character for which neither <b><a href="./ansiCtype.html#isspace">isspace</a>(&nbsp;)</b> nor <b><a href="./ansiCtype.html#isalnum">isalnum</a>(&nbsp;)</b> is true.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
Non-zero if and only if <i>c</i> is a punctuation character.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="isspace"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>isspace(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>isspace(&nbsp;)</strong> - test whether a character is a white-space character (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int isspace
    (
    int c                     /* character to test */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine tests whether a character is one of
the standard white-space characters, as follows:
<p>
<table>
<tr valign=top>
<td align=left>        space           </td><td align=left> "\0"</tr>
<tr valign=top>
<td align=left>        horizontal tab  </td><td align=left> \t</tr>
<tr valign=top>
<td align=left>        vertical tab    </td><td align=left> \v</tr>
<tr valign=top>
<td align=left>        carriage return </td><td align=left> \r</tr>
<tr valign=top>
<td align=left>        new-line        </td><td align=left> \n</tr>
<tr valign=top>
<td align=left>        form-feed       </td><td align=left> \f</tr>
<tr valign=top>
<td align=left></tr>
</tr>

</table>

</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
Non-zero if and only if <i>c</i> is a space, tab, carriage return,
new-line, or form-feed character.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="isupper"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>isupper(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>isupper(&nbsp;)</strong> - test whether a character is an upper-case letter (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int isupper
    (
    int c                     /* character to test */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine tests whether <i>c</i> is an upper-case letter.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
Non-zero if and only if <i>c</i> is an upper-case letter.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="isxdigit"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>isxdigit(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>isxdigit(&nbsp;)</strong> - test whether a character is a hexadecimal digit (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int isxdigit
    (
    int c                     /* character to test */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine tests whether <i>c</i> is a hexadecimal-digit character.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
Non-zero if and only if <i>c</i> is a hexadecimal digit.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="tolower"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>tolower(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>tolower(&nbsp;)</strong> - convert an upper-case letter to its lower-case equivalent (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int tolower
    (
    int c                     /* character to convert */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine converts an upper-case letter to the corresponding lower-case
letter.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
<p>
If <i>c</i> is an upper-case letter, it returns the lower-case equivalent;
otherwise, it returns the argument unchanged.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

<hr>
<a name="toupper"></a>
<p align=right>
<a href="rtnIndex.htm"><i>OS Libraries :  Routines</i></a></p>

</blockquote><h1>toupper(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong>toupper(&nbsp;)</strong> - convert a lower-case letter to its upper-case equivalent (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int toupper
    (
    int c                     /* character to convert */
    )
</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine converts a lower-case letter to the corresponding upper-case
letter.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>ctype.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
<p>
If <i>c</i> is a lower-case letter, it returns the upper-case equivalent;
otherwise, it returns the argument unchanged.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiCtype.html#top">ansiCtype</a></b>

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