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vxworks相关论文

unspecified.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b>
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
N/A
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>

<hr>
<a name="rand"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>rand</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>rand</i>(&nbsp;)</strong> - generate a pseudo-random integer between 0 and <b>RAND_MAX</b>  (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>

int rand (void)</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine generates a pseudo-random integer between 0 and <b>RAND_MAX</b>.
The seed value for <b><i><a href="./ansiStdlib.html#rand">rand</a></i>(&nbsp;)</b> can be reset with <b><i><a href="./ansiStdlib.html#srand">srand</a></i>(&nbsp;)</b>.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
A pseudo-random integer.
<p>
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>, <b><i><a href="./ansiStdlib.html#srand">srand</a></i>(&nbsp;)</b>

<hr>
<a name="srand"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>srand</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>srand</i>(&nbsp;)</strong> - reset the value of the seed used to generate random numbers (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>void * srand
    (
    uint_t seed /* random number seed */
    )</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine resets the seed value used by <b><i><a href="./ansiStdlib.html#rand">rand</a></i>(&nbsp;)</b>.  If <b><i><a href="./ansiStdlib.html#srand">srand</a></i>(&nbsp;)</b> is then
called with the same seed value, the sequence of pseudo-random numbers is
repeated.  If <b><i><a href="./ansiStdlib.html#rand">rand</a></i>(&nbsp;)</b> is called before any calls to <b><i><a href="./ansiStdlib.html#srand">srand</a></i>(&nbsp;)</b> have been made,
the same sequence shall be generated as when <b><i><a href="./ansiStdlib.html#srand">srand</a></i>(&nbsp;)</b> is first called with
the seed value of 1.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
N/A
<p>
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>, <b><i><a href="./ansiStdlib.html#rand">rand</a></i>(&nbsp;)</b>

<hr>
<a name="strtod"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>strtod</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>strtod</i>(&nbsp;)</strong> - convert the initial portion of a string to a double (ANSI) </p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>double strtod
    (
    const char * s,     /* string to convert */
    char * *     endptr /* ptr to final string */
    )</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine converts the initial portion of a specified string <i>s</i> to a
double.  First, it decomposes the input string into three parts:  an initial, 
possibly empty, sequence of white-space characters (as specified by the 
<b><i><a href="./ansiCtype.html#isspace">isspace</a></i>(&nbsp;)</b> function); a subject sequence resembling a floating-point
constant; and a final string of one or more unrecognized characters, 
including the terminating null character of the input string.  Then, it
attempts to convert the subject sequence to a floating-point number, and 
returns the result.
<p>
The expected form of the subject sequence is an optional plus or minus
decimal-point character, then an optional exponent part but no floating
suffix.  The subject sequence is defined as the longest initial
subsequence of the input string, starting with the first non-white-space
character, that is of the expected form.  The subject sequence contains
no characters if the input string is empty or consists entirely of 
white space, or if the first non-white-space character is other than a 
sign, a digit, or a decimal-point character.
<p>
If the subject sequence has the expected form, the sequence of characters
starting with the first digit or the decimal-point character (whichever
occurs first) is interpreted as a floating constant, except that the 
decimal-point character is used in place of a period, and that if neither
an exponent part nor a decimal-point character appears, a decimal point is
assumed to follow the last digit in the string.  If the subject sequence
begins with a minus sign, the value resulting form the conversion is negated.
A pointer to the final string is stored in the object pointed to by <i>endptr</i>,
provided that <i>endptr</i> is not a null pointer.
<p>
In other than the "C" locale, additional implementation-defined subject
sequence forms may be accepted.  VxWorks supports only the "C" locale.
<p>
If the subject sequence is empty or does not have the expected form, no
conversion is performed; the value of <i>s</i> is stored in the object pointed
to by <i>endptr</i>, provided that <i>endptr</i> is not a null pointer.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
<p>
The converted value, if any.  If no conversion could be performed, it
returns zero.  If the correct value is outside the range of representable
values, it returns plus or minus <b>HUGE_VAL</b> (according to the sign of the
value), and stores the value of the macro ERANGE in <b>errno</b>.  If the
correct value would cause underflow, it returns zero and stores the value
of the macro ERANGE in <b>errno</b>.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>

<hr>
<a name="strtol"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>strtol</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>strtol</i>(&nbsp;)</strong> - convert a string to a long integer (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>long strtol
    (
    const char * nptr,   /* string to convert */
    char * *     endptr, /* ptr to final string */
    int          base    /* radix */
    )</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine converts the initial portion of a string <i>nptr</i> to <b>long int</b>
representation.  First, it decomposes the input string into three parts:
an initial, possibly empty, sequence of white-space characters (as
specified by <b><i><a href="./ansiCtype.html#isspace">isspace</a></i>(&nbsp;)</b>); a subject sequence resembling an integer
represented in some radix determined by the value of <i>base</i>; and a final
string of one or more unrecognized characters, including the terminating
NULL character of the input string.  Then, it attempts to convert the
subject sequence to an integer number, and returns the result.
<p>
If the value of <i>base</i> is zero, the expected form of the subject sequence
is that of an integer constant, optionally preceded by a plus or minus
sign, but not including an integer suffix.  If the value of <i>base</i> is
between 2 and 36, the expected form of the subject sequence is a sequence
of letters and digits representing an integer with the radix specified by
<i>base</i> optionally preceded by a plus or minus sign, but not including an
integer suffix.  The letters from a (or A) through to z (or Z) are
ascribed the values 10 to 35; only letters whose ascribed values are less
than <i>base</i> are premitted.  If the value of <i>base</i> is 16, the characters
0x or 0X may optionally precede the sequence of letters and digits,
following the sign if present.
<p>
The subject sequence is defined as the longest initial subsequence of the 
input string, starting with the first non-white-space character, that is of 
the expected form.  The subject sequence contains no characters if the 
input string is empty or consists entirely of white space, or if the first
non-white-space character is other than a sign or a permissible letter or
digit.
<p>
If the subject sequence has the expected form and the value of <i>base</i> is
zero, the sequence of characters starting with the first digit is
interpreted as an integer constant.  If the subject sequence has the
expected form and the value of <i>base</i> is between 2 and 36, it is used as
the <i>base</i> for conversion, ascribing to each latter its value as given
above.  If the subject sequence begins with a minus sign, the value
resulting from the conversion is negated.  A pointer to the final string
is stored in the object pointed to by <i>endptr</i>, provided that <i>endptr</i> is
not a NULL pointer.
<p>
In other than the "C" locale, additional implementation-defined subject
sequence forms may be accepted.  VxWorks supports only the "C" locale;
it assumes that the upper- and lower-case alphabets and digits are
each contiguous.
<p>
If the subject sequence is empty or does not have the expected form, no
conversion is performed; the value of <i>nptr</i> is stored in the object
pointed to by <i>endptr</i>, provided that <i>endptr</i> is not a NULL pointer.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
<p>
The converted value, if any.  If no conversion could be performed, it
returns zero.  If the correct value is outside the range of representable
values, it returns <b>LONG_MAX</b> or <b>LONG_MIN</b> (according to the sign of the
value), and stores the value of the macro ERANGE in <b>errno</b>.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>

<hr>
<a name="strtoul"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>strtoul</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>strtoul</i>(&nbsp;)</strong> - convert a string to an unsigned long integer (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>ulong_t strtoul
    (
    const char * nptr,   /* string to convert */
    char * *     endptr, /* ptr to final string */
    int          base    /* radix */
    )</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This routine converts the initial portion of a string <i>nptr</i> to
<b>unsigned long int</b> representation.  First, it decomposes the input
string into three parts:  an initial, possibly empty, sequence of
white-space characters (as specified by <b><i><a href="./ansiCtype.html#isspace">isspace</a></i>(&nbsp;)</b>); a subject sequence
resembling an unsigned integer represented in some radix determined by
the value <i>base</i>; and a final string of one or more unrecognized
characters, including the terminating null character of the input string.
Then, it attempts to convert the subject sequence to an unsigned integer,
and returns the result.
<p>
If the value of <i>base</i> is zero, the expected form of the subject sequence
is that of an integer constant, optionally preceded by a plus or minus
sign, but not including an integer suffix.  If the value of <i>base</i> is
between 2 and 36, the expected form of the subject sequence is a sequence
of letters and digits representing an integer with the radix specified by
letters from a (or A) through z (or Z) which are ascribed the values 10 to
35; only letters whose ascribed values are less than <i>base</i> are
premitted.  If the value of <i>base</i> is 16, the characters 0x or 0X may
optionally precede the sequence of letters and digits, following the sign
if present.
<p>
The subject sequence is defined as the longest initial subsequence of the
input string, starting with the first non-white-space character, that is
of the expected form.  The subject sequence contains no characters if the
input string is empty or consists entirely of white space, or if the first
non-white-space character is other than a sign or a permissible letter or
digit.
<p>
If the subject sequence has the expected form and the value of <i>base</i> is
zero, the sequence of characters starting with the first digit is
interpreted as an integer constant.  If the subject sequence has the
expected form and the value of <i>base</i> is between 2 and 36, it is used as
the <i>base</i> for conversion, ascribing to each letter its value as given
above.  If the subject sequence begins with a minus sign, the value
resulting from the conversion is negated.  A pointer to the final string
is stored in the object pointed to by <i>endptr</i>, provided that <i>endptr</i> is
not a null pointer.
<p>
In other than the "C" locale, additional implementation-defined subject
sequence forms may be accepted.  VxWorks supports only the "C" locale;
it assumes that the upper- and lower-case alphabets and digits are
each contiguous.
<p>
If the subject sequence is empty or does not have the expected form, no
conversion is performed; the value of <i>nptr</i> is stored in the object
pointed to by <i>endptr</i>, provided that <i>endptr</i> is not a null pointer.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
<p>
The converted value, if any.  If no conversion could be performed it
returns zero.  If the correct value is outside the range of representable
values, it returns <b>ULONG_MAX</b>, and stores the value of the macro ERANGE in
<i>errno</i>.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>

<hr>
<a name="system"></a>
<p align=right>
<a href="rtnIndex.html"><i>Libraries :  Routines</i></a></p>

</blockquote><h1><i>system</i>(&nbsp;)</h1> <blockquote></a></blockquote><h4>NAME</h4><blockquote>  
<p><strong><i>system</i>(&nbsp;)</strong> - pass a string to a command processor (Unimplemented) (ANSI)</p>

</blockquote><h4>SYNOPSIS</h4><blockquote><p>
<pre>int system
    (
    const char * string /* pointer to string */
    )</pre>

</blockquote><h4>DESCRIPTION</h4><blockquote><p>
This function is not applicable to VxWorks.
<p>
</blockquote><h4>INCLUDE FILES</h4><blockquote><p>
<b>stdlib.h</b> 
<p>
</blockquote><h4>RETURNS</h4><blockquote><p>
OK, always.
</blockquote><h4>SEE ALSO</h4><blockquote><p>
<b><a href="./ansiStdlib.html#top">ansiStdlib</a></b>

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