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264 lines
8.9 KiB
264 lines
8.9 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: stlsoft/conversion/number/grouping_functions.hpp
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*
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* Purpose: Number formatting functions.
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*
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* Created: 28th August 2005
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* Updated: 30th July 2012
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 2005-2012, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////////// */
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/** \file stlsoft/conversion/number/grouping_functions.hpp
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*
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* \brief [C++ only] Definition of the stlsoft::format_thousands() formatting
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* function
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* (\ref group__library__conversion "Conversion" Library).
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*/
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#ifndef STLSOFT_INCL_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS
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#define STLSOFT_INCL_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define STLSOFT_VER_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS_MAJOR 1
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# define STLSOFT_VER_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS_MINOR 0
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# define STLSOFT_VER_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS_REVISION 5
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# define STLSOFT_VER_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS_EDIT 13
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
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# include <stlsoft/stlsoft.h>
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#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */
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#ifndef STLSOFT_INCL_STLSOFT_CONVERSION_HPP_INTEGER_TO_STRING
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# include <stlsoft/conversion/integer_to_string.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_CONVERSION_HPP_INTEGER_TO_STRING */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER
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# include <stlsoft/memory/auto_buffer.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER */
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#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_TRAITS
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# include <stlsoft/string/char_traits.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_TRAITS */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft
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{
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Functions
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*/
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/** \brief
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*
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* \ingroup group__library__conversion
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*
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* \param dest Pointer to buffer to receive translation. If NULL, function returns required size.
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* \param cchDest Size of available buffer. Ignored if dest is NULL.
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* \param picture Grouping picture. May not be NULL. Behaviour is undefined if contains any characters other than <code>fmtSep</code> and digits.
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* \param rawNumber The raw number form. May not be NULL. Behaviour is undefined contains any characters other than digits.
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* \param fmtSep The separator in the format.
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* \param outputSep The separator in the output.
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*/
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template <ss_typename_param_k C>
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inline
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ss_size_t
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translate_thousands(
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C* dest
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, ss_size_t cchDest
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, C const* picture
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, C const* rawNumber
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, C fmtSep
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, C outputSep
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)
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{
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typedef char_traits<C> traits_t;
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const ss_size_t cchRawNumber = traits_t::length(rawNumber);
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auto_buffer<C> res(1 + 2 * cchRawNumber);
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C const* pic_next;
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for(pic_next = picture; fmtSep == *pic_next; ++pic_next)
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{}
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STLSOFT_ASSERT('0' != *pic_next);
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STLSOFT_ASSERT('0' < *pic_next);
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C const* raw_end = rawNumber + cchRawNumber;
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C const* const raw_begin = rawNumber;
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C* res_end = &*(res.end() - 1);
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ss_size_t num = static_cast<ss_size_t>(*pic_next - '0'); // Derive the first
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ss_size_t n = num;
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*res_end = '\0';
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for(--raw_end, --res_end; raw_end != raw_begin; --raw_end, --res_end)
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{
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*res_end = *raw_end;
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if( 0 != n &&
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0 == --n)
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{
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if('\0' == *pic_next)
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{
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}
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else if('0' == *pic_next)
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{
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n = num;
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}
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else
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{
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C const* pic_end_next = ++pic_next;
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for(; *pic_end_next == fmtSep; ++pic_end_next)
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{}
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pic_next = pic_end_next;
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if('\0' == *pic_next)
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{
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*--res_end = outputSep;
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}
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else if('0' == *pic_next)
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{
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n = num;
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}
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else
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{
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num = static_cast<ss_size_t>(*pic_next - '0');
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n = num;
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}
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}
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if(0 != n)
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{
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*--res_end = outputSep;
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}
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}
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}
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*res_end = *raw_end;
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ss_size_t cch = static_cast<ss_size_t>(res.end() - res_end);
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if(NULL != dest)
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{
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if(cch > cchDest)
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{
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cch = cchDest;
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}
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traits_t::copy(dest, res_end, cch);
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}
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return cch;
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}
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/** \brief
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*
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* \ingroup group__library__conversion
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*
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* \param dest Pointer to buffer to receive translation. If NULL, function returns required size.
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* \param cchDest Size of available buffer. Ignored if dest is NULL.
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* \param picture Grouping picture. May not be NULL. Behaviour is undefined if contains any characters other than <code>fmtSep</code> and digits.
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* \param number The raw number form. May not be NULL. Behaviour is undefined contains any characters other than digits.
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* \param fmtSep The separator in the format.
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* \param outputSep The separator in the output.
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k I
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>
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inline
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ss_size_t
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format_thousands(
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C* dest
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, ss_size_t cchDest
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, C const* picture
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, I const& number
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, C fmtSep
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, C outputSep
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)
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{
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C szRawNumber[21]; // 21 is large enough for any 64-bit number (signed or unsigned)
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C const* rawNumber = integer_to_string(szRawNumber, STLSOFT_NUM_ELEMENTS(szRawNumber), static_cast<unsigned int>(number));
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STLSOFT_STATIC_ASSERT(sizeof(C) <= 8);
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return translate_thousands(dest, cchDest, picture, rawNumber, fmtSep, outputSep);
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}
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/** \brief
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*
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* \ingroup group__library__conversion
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*
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* \param dest Pointer to buffer to receive translation. If NULL, function returns required size.
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* \param cchDest Size of available buffer. Ignored if dest is NULL.
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* \param picture Grouping picture. May not be NULL. Behaviour is undefined if contains any characters other than <code>fmtSep</code> and digits.
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* \param number The raw number form. May not be NULL. Behaviour is undefined contains any characters other than digits.
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k I
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>
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inline
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ss_size_t
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format_thousands(
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C* dest
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, ss_size_t cchDest
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, C const* picture
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, I const& number
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)
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{
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return format_thousands<C, I>(dest, cchDest, picture, number, ';', ',');
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}
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/* /////////////////////////////////////////////////////////////////////////
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* Unittest
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*/
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#ifdef STLSOFT_UNITTEST
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# include "./unittest/grouping_functions_unittest_.h"
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#endif /* STLSOFT_UNITTEST */
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/* ////////////////////////////////////////////////////////////////////// */
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#ifndef _STLSOFT_NO_NAMESPACE
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} // namespace stlsoft
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !STLSOFT_INCL_STLSOFT_CONVERSION_NUMBER_HPP_GROUPING_FUNCTIONS */
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/* ///////////////////////////// end of file //////////////////////////// */
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