You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
397 lines
12 KiB
397 lines
12 KiB
/* /////////////////////////////////////////////////////////////////////////
|
|
* File: stlsoft/string/view_slice_functions.hpp
|
|
*
|
|
* Purpose: String view slice functions.
|
|
*
|
|
* Created: 25th April 2005
|
|
* Updated: 4th July 2012
|
|
*
|
|
* Thanks: To Pablo Aguilar for inspiration for these functions, and
|
|
* collaboration on their implementation.
|
|
*
|
|
* Home: http://stlsoft.org/
|
|
*
|
|
* Copyright (c) 2005-2012, Matthew Wilson and Synesis Software
|
|
* Copyright (c) 2005, Pablo Aguilar
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
* - Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
|
|
* any contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ////////////////////////////////////////////////////////////////////// */
|
|
|
|
|
|
/** \file stlsoft/string/view_slice_functions.hpp
|
|
*
|
|
* \brief [C++ only] String view slice functions
|
|
* (\ref group__library__string "String" Library).
|
|
*/
|
|
|
|
#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS
|
|
#define STLSOFT_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS
|
|
|
|
#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
# define STLSOFT_VER_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS_MAJOR 2
|
|
# define STLSOFT_VER_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS_MINOR 1
|
|
# define STLSOFT_VER_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS_REVISION 6
|
|
# define STLSOFT_VER_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS_EDIT 26
|
|
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
|
|
|
/* /////////////////////////////////////////////////////////////////////////
|
|
* Compatibility
|
|
*/
|
|
|
|
/*
|
|
[Incompatibilies-start]
|
|
STLSOFT_COMPILER_IS_MWERKS: __MWERKS__<0x3000
|
|
STLSOFT_COMPILER_IS_WATCOM:
|
|
[Incompatibilies-end]
|
|
*/
|
|
|
|
/* /////////////////////////////////////////////////////////////////////////
|
|
* Includes
|
|
*/
|
|
|
|
#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
|
|
# include <stlsoft/stlsoft.h>
|
|
#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */
|
|
#if defined(STLSOFT_COMPILER_IS_MWERKS) && \
|
|
((__MWERKS__ & 0xff00) < 0x3000)
|
|
# error stlsoft/string/view_slice_functions.hpp not compatible with Metrowerks 7.x (v2.4)
|
|
#endif /* compiler */
|
|
#ifndef STLSOFT_INCL_STLSOFT_SHIMS_ACCESS_HPP_STRING
|
|
# include <stlsoft/shims/access/string.hpp>
|
|
#endif /* !STLSOFT_INCL_STLSOFT_SHIMS_ACCESS_HPP_STRING */
|
|
#if defined(STLSOFT_COMPILER_IS_GCC)
|
|
# ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_SIMPLE_STRING
|
|
# include <stlsoft/string/simple_string.hpp>
|
|
# endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_SIMPLE_STRING */
|
|
#endif
|
|
#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_STRING_VIEW
|
|
# include <stlsoft/string/string_view.hpp>
|
|
#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_STRING_VIEW */
|
|
|
|
#ifdef STLSOFT_UNITTEST
|
|
# include <string>
|
|
# ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_SIMPLE_STRING
|
|
# include <stlsoft/string/simple_string.hpp>
|
|
# endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_SIMPLE_STRING */
|
|
#endif /* STLSOFT_UNITTEST */
|
|
|
|
/* /////////////////////////////////////////////////////////////////////////
|
|
* Namespace
|
|
*/
|
|
|
|
#ifndef _STLSOFT_NO_NAMESPACE
|
|
namespace stlsoft
|
|
{
|
|
#endif /* _STLSOFT_NO_NAMESPACE */
|
|
|
|
/* /////////////////////////////////////////////////////////////////////////
|
|
* Helper classes
|
|
*/
|
|
|
|
#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
|
|
template <ss_typename_param_k S>
|
|
struct string_view_helper_traits
|
|
{
|
|
typedef S string_type;
|
|
typedef ss_typename_type_k string_type::value_type char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
|
|
# if !defined(STLSOFT_COMPILER_IS_MSVC) || \
|
|
_MSC_VER >= 1310
|
|
STLSOFT_TEMPLATE_SPECIALISATION
|
|
struct string_view_helper_traits<ss_char_a_t*>
|
|
{
|
|
typedef ss_char_a_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
# endif /* compiler */
|
|
|
|
STLSOFT_TEMPLATE_SPECIALISATION
|
|
struct string_view_helper_traits<ss_char_a_t const*>
|
|
{
|
|
typedef ss_char_a_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
|
|
# ifdef STLSOFT_CF_STATIC_ARRAY_SIZE_DETERMINATION_SUPPORT
|
|
template <size_t N>
|
|
struct string_view_helper_traits<ss_char_a_t [N]>
|
|
{
|
|
typedef ss_char_a_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
template <size_t N>
|
|
struct string_view_helper_traits<ss_char_a_t const [N]>
|
|
{
|
|
typedef ss_char_a_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
# endif /* STLSOFT_CF_STATIC_ARRAY_SIZE_DETERMINATION_SUPPORT */
|
|
|
|
# if !defined(STLSOFT_COMPILER_IS_MSVC) || \
|
|
_MSC_VER >= 1310
|
|
STLSOFT_TEMPLATE_SPECIALISATION
|
|
struct string_view_helper_traits<ss_char_w_t*>
|
|
{
|
|
typedef ss_char_w_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
# endif /* compiler */
|
|
|
|
STLSOFT_TEMPLATE_SPECIALISATION
|
|
struct string_view_helper_traits<ss_char_w_t const*>
|
|
{
|
|
typedef ss_char_w_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
|
|
# ifdef STLSOFT_CF_STATIC_ARRAY_SIZE_DETERMINATION_SUPPORT
|
|
template <size_t N>
|
|
struct string_view_helper_traits<ss_char_w_t [N]>
|
|
{
|
|
typedef ss_char_w_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
template <size_t N>
|
|
struct string_view_helper_traits<ss_char_w_t const [N]>
|
|
{
|
|
typedef ss_char_w_t char_type;
|
|
typedef basic_string_view<char_type> view_type;
|
|
};
|
|
# endif /* STLSOFT_CF_STATIC_ARRAY_SIZE_DETERMINATION_SUPPORT */
|
|
|
|
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
|
|
|
/* /////////////////////////////////////////////////////////////////////////
|
|
* Slice functions
|
|
*/
|
|
|
|
#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
template <ss_typename_param_k C>
|
|
inline basic_string_view<C> left_view_helper(C const* s, ss_size_t n)
|
|
{
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
|
|
if(n > len)
|
|
{
|
|
// Want more than is available, so get all
|
|
n = len;
|
|
}
|
|
|
|
return basic_string_view<C>(s, n);
|
|
}
|
|
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_a_t> left_view(ss_char_a_t const* s, ss_size_t n)
|
|
{
|
|
return left_view_helper(s, n);
|
|
}
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_w_t> left_view(ss_char_w_t const* s, ss_size_t n)
|
|
{
|
|
return left_view_helper(s, n);
|
|
}
|
|
|
|
template <ss_typename_param_k S>
|
|
inline ss_typename_type_ret_k string_view_helper_traits<S>::view_type left_view(S const& s, ss_size_t n)
|
|
{
|
|
typedef string_view_helper_traits<S> traits_t;
|
|
typedef ss_typename_type_k traits_t::view_type view_t;
|
|
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
|
|
if(n > len)
|
|
{
|
|
// Want more than is available, so get all
|
|
n = len;
|
|
}
|
|
|
|
return view_t(s.data(), n);
|
|
}
|
|
|
|
#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
template <ss_typename_param_k C>
|
|
inline basic_string_view<C> right_view_helper(C const* s, ss_size_t n)
|
|
{
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
|
|
if(n > len)
|
|
{
|
|
// Want more than is available, so get all, from start
|
|
n = len;
|
|
}
|
|
else
|
|
{
|
|
// Want less than is available, so get n from end
|
|
s += (len - n);
|
|
}
|
|
|
|
return basic_string_view<C>(s, n);
|
|
}
|
|
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_a_t> right_view(ss_char_a_t const* s, ss_size_t n)
|
|
{
|
|
return right_view_helper(s, n);
|
|
}
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_w_t> right_view(ss_char_w_t const* s, ss_size_t n)
|
|
{
|
|
return right_view_helper(s, n);
|
|
}
|
|
|
|
template <ss_typename_param_k S>
|
|
inline ss_typename_type_ret_k string_view_helper_traits<S>::view_type right_view(S const& s, ss_size_t n)
|
|
{
|
|
typedef string_view_helper_traits<S> traits_t;
|
|
typedef ss_typename_type_k traits_t::view_type view_t;
|
|
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
ss_size_t off = 0;
|
|
|
|
if(n > len)
|
|
{
|
|
// Want more than is available, so get all, from start
|
|
n = len;
|
|
}
|
|
else
|
|
{
|
|
off = len - n;
|
|
}
|
|
|
|
return view_t(s.data() + off, n);
|
|
}
|
|
|
|
#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
template <ss_typename_param_k C>
|
|
inline basic_string_view<C> mid_view_helper(C const* s, ss_size_t start, ss_size_t n)
|
|
{
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
ss_size_t off = 0;
|
|
|
|
if(start > len)
|
|
{
|
|
// Want more than is available, so we start at the end
|
|
off = len;
|
|
}
|
|
else
|
|
{
|
|
off = start;
|
|
}
|
|
|
|
if(off + n > len)
|
|
{
|
|
// Want more than is available starting at off, so we just get what is available
|
|
n = len - off;
|
|
}
|
|
|
|
return basic_string_view<C>(s + off, n);
|
|
}
|
|
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_a_t> mid_view(ss_char_a_t const* s, ss_size_t start, ss_size_t n)
|
|
{
|
|
return mid_view_helper(s, start, n);
|
|
}
|
|
|
|
/** \brief
|
|
*
|
|
* \ingroup group__library__string
|
|
*/
|
|
inline basic_string_view<ss_char_w_t> mid_view(ss_char_w_t const* s, ss_size_t start, ss_size_t n)
|
|
{
|
|
return mid_view_helper(s, start, n);
|
|
}
|
|
|
|
template <ss_typename_param_k S>
|
|
inline ss_typename_type_ret_k string_view_helper_traits<S>::view_type mid_view(S const& s, ss_size_t start, ss_size_t n)
|
|
{
|
|
typedef string_view_helper_traits<S> traits_t;
|
|
typedef ss_typename_type_k traits_t::view_type view_t;
|
|
|
|
const ss_size_t len = stlsoft_ns_qual(c_str_len)(s);
|
|
ss_size_t off = 0;
|
|
|
|
if(start > len)
|
|
{
|
|
// Want more than is available, so we start at the end
|
|
off = len;
|
|
}
|
|
else
|
|
{
|
|
off = start;
|
|
}
|
|
|
|
if(off + n > len)
|
|
{
|
|
// Want more than is available starting at off, so we just get what is available
|
|
n = len - off;
|
|
}
|
|
|
|
return view_t(s.data() + off, n);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
// Unit-testing
|
|
|
|
#ifdef STLSOFT_UNITTEST
|
|
# include "./unittest/view_slice_functions_unittest_.h"
|
|
#endif /* STLSOFT_UNITTEST */
|
|
|
|
/* ////////////////////////////////////////////////////////////////////// */
|
|
|
|
#ifndef _STLSOFT_NO_NAMESPACE
|
|
} // namespace stlsoft
|
|
#endif /* _STLSOFT_NO_NAMESPACE */
|
|
|
|
/* ////////////////////////////////////////////////////////////////////// */
|
|
|
|
#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_VIEW_SLICE_FUNCTIONS */
|
|
|
|
/* ///////////////////////////// end of file //////////////////////////// */
|