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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - arparse library assumes enum are 64 bit"
href="https://bugs.dpdk.org/show_bug.cgi?id=1409">1409</a>
</td>
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<tr>
<th>Summary</th>
<td>arparse library assumes enum are 64 bit
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>24.03
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>core
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>stephen@networkplumber.org
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">MSVC correctly flags that this line in rte_argparse.h is incorrect:
RTE_ARGPARSE_ARG_RESERVED_FIELD = RTE_GENMASK64(63, 48),
The problem is that enum values are just an alias for int, and it can be 32
bits.
Taken from the current C Standard (C99):
<a href="http://www.open">http://www.open</a> std.org/JTC1/SC22/WG14/www/docs/n1256.pdf
6.7.2.2 Enumeration specifiers
[...]
Constraints
The expression that defines the value of an enumeration constant shall be an
integer constant expression that has a value representable as an int.
[...]
Each enumerated type shall be compatible with char, a signed integer type, or
an unsigned integer type. The choice of type is implementation-defined, but
shall be capable of representing the values of all the members of the
enumeration.
Since rte_argparse only uses 10 bits now. The suggested fix here is to:
1. Assume 32 bits
2. Get rid of the reserved field - reserved fields are bad idea
</pre>
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