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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - basic_istream::read(s, n) should use sgetn(s, n) rather than calling sbumpc() for each character."
href="http://llvm.org/bugs/show_bug.cgi?id=15427">15427</a>
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<th>Summary</th>
<td>basic_istream::read(s, n) should use sgetn(s, n) rather than calling sbumpc() for each character.
</td>
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<th>Product</th>
<td>libc++
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
</td>
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<th>Assignee</th>
<td>hhinnant@apple.com
</td>
</tr>
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<th>Reporter</th>
<td>tuhertz@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
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<pre>basic_istream::read(s, n) should call basic_streambuf's sgetn(s, n) as
basic_ostream::write(s, n) calling sputn(s, n).
in basic_istream::read(char_type* __s, streamsize __n)
- for (; __gc_ < __n; ++__gc_)
- {
- typename traits_type::int_type __i = this->rdbuf()->sbumpc();
- if (traits_type::eq_int_type(__i, traits_type::eof()))
- {
- this->setstate(ios_base::failbit | ios_base::eofbit);
- break;
- }
- *__s++ = traits_type::to_char_type(__i);
- }
+ __gc_ = this->rdbuf()->sgetn(__s, __n);
+ if (__gc_ != __n)
+ this->setstate(ios_base::failbit | ios_base::eofbit);</pre>
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