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Add boost/thread/detail/string_to_unsigned.hpp

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This commit is contained in:
Peter Dimov
2023-10-14 03:21:14 +03:00
parent 5cbc8db036
commit 710e6fd278
3 changed files with 111 additions and 0 deletions
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55
include/boost/thread/detail/string_to_unsigned.hpp Normal file
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@@ -0,0 +1,55 @@
#ifndef BOOST_THREAD_DETAIL_STRING_TO_UNSIGNED_HPP_INCLUDED
#define BOOST_THREAD_DETAIL_STRING_TO_UNSIGNED_HPP_INCLUDED
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <string>
#include <climits>
namespace boost
{
namespace thread_detail
{
inline bool string_to_unsigned( std::string const& s, unsigned& v )
{
v = 0;
if( s.empty() )
{
return false;
}
for( char const* p = s.c_str(); *p; ++p )
{
unsigned char ch = static_cast<unsigned char>( *p );
if( ch < '0' || ch > '9' )
{
return false;
}
if( v > UINT_MAX / 10 )
{
return false;
}
unsigned q = static_cast<unsigned>( ch - '0' );
if( v == UINT_MAX / 10 && q > UINT_MAX % 10 )
{
return false;
}
v = v * 10 + q;
}
return true;
}
} // namespace thread_detail
} // namespace boost
#endif // #ifndef BOOST_THREAD_DETAIL_STRING_TO_UNSIGNED_HPP_INCLUDED

1
test/Jamfile.v2
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@@ -1103,5 +1103,6 @@ rule generate_self_contained_header_tests
test-suite detail
:
[ run detail/string_trim_test.cpp ]
[ run detail/string_to_unsigned_test.cpp ]
;
}

55
test/detail/string_to_unsigned_test.cpp Normal file
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@@ -0,0 +1,55 @@
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/thread/detail/string_to_unsigned.hpp>
#include <boost/core/lightweight_test.hpp>
int main()
{
using boost::thread_detail::string_to_unsigned;
unsigned v;
BOOST_TEST_NOT( string_to_unsigned( "", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST_NOT( string_to_unsigned( " ", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST_NOT( string_to_unsigned( "+1", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST_NOT( string_to_unsigned( "-1", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST_NOT( string_to_unsigned( "abc", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST( string_to_unsigned( "0", v ) ) && BOOST_TEST_EQ( v, 0 );
BOOST_TEST( string_to_unsigned( "1", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "12", v ) ) && BOOST_TEST_EQ( v, 12 );
BOOST_TEST( string_to_unsigned( "123", v ) ) && BOOST_TEST_EQ( v, 123 );
BOOST_TEST( string_to_unsigned( "1234", v ) ) && BOOST_TEST_EQ( v, 1234 );
BOOST_TEST( string_to_unsigned( "12345", v ) ) && BOOST_TEST_EQ( v, 12345 );
BOOST_TEST( string_to_unsigned( "123456", v ) ) && BOOST_TEST_EQ( v, 123456 );
BOOST_TEST( string_to_unsigned( "1234567", v ) ) && BOOST_TEST_EQ( v, 1234567 );
BOOST_TEST( string_to_unsigned( "12345678", v ) ) && BOOST_TEST_EQ( v, 12345678 );
BOOST_TEST( string_to_unsigned( "123456789", v ) ) && BOOST_TEST_EQ( v, 123456789 );
BOOST_TEST( string_to_unsigned( "1234567890", v ) ) && BOOST_TEST_EQ( v, 1234567890 );
BOOST_TEST_NOT( string_to_unsigned( "12345678901", v ) ) && BOOST_TEST_EQ( v, 1234567890 );
BOOST_TEST_NOT( string_to_unsigned( "123456789012", v ) ) && BOOST_TEST_EQ( v, 1234567890 );
BOOST_TEST( string_to_unsigned( "4294967295", v ) ) && BOOST_TEST_EQ( v, 4294967295 );
BOOST_TEST_NOT( string_to_unsigned( "4294967296", v ) ) && BOOST_TEST_EQ( v, 429496729 );
BOOST_TEST( string_to_unsigned( "01", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "0001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "00001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "0000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "00000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "0000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "00000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "000000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "0000000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST( string_to_unsigned( "00000000000001", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST_NOT( string_to_unsigned( "1a", v ) ) && BOOST_TEST_EQ( v, 1 );
BOOST_TEST_NOT( string_to_unsigned( "2 ", v ) ) && BOOST_TEST_EQ( v, 2 );
return boost::report_errors();
}