utf8_helper.cpp
author Volker Birk <vb@pep-project.org>
Fri, 24 Apr 2015 20:24:47 +0200
changeset 10 15fd256d4adb
parent 0 0aa9866d751c
child 37 863fc3ccd19d
permissions -rw-r--r--
moving into cpp file
     1 #include "stdafx.h"
     2 #include "utf8_helper.h"
     3 
     4 using namespace ATL;
     5 using namespace std;
     6 
     7 namespace pEp {
     8     namespace utility {
     9 
    10         string utf8_string(wstring wstr, NORM_FORM norm)
    11         {
    12             if (wstr.size() == 0)
    13                 return string();
    14 
    15             wstring _wstr_normalized;
    16 
    17             if (norm == NormalizationOther)
    18                 _wstr_normalized = wstr;
    19             else {
    20                 int size = NormalizeString(norm, wstr.c_str(), -1, NULL, 0);
    21                 assert(size > 0);
    22                 if (size > 0) {
    23                     wchar_t *buf = new wchar_t[size];
    24                     NormalizeString(norm, wstr.c_str(), -1, buf, size);
    25                     _wstr_normalized = buf;
    26                     delete[] buf;
    27                 }
    28                 else
    29                     throw out_of_range("input wstring is not valid while normalizing.");
    30             }
    31             string result;
    32 
    33             int size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, _wstr_normalized.c_str(), -1, NULL, 0, NULL, NULL);
    34             assert(size);
    35             if (size) {
    36                 char *buf = new char[size];
    37                 WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, _wstr_normalized.c_str(), -1, buf, size, NULL, NULL);
    38                 result = buf;
    39                 delete[] buf;
    40             }
    41             else
    42                 throw out_of_range("input wstring is not valid while converting UTF-16 to UTF-8.");
    43 
    44             return result;
    45         }
    46 
    47         string utf8_string(BSTR bstr, NORM_FORM norm)
    48         {
    49             return utf8_string((wstring) (wchar_t *) _bstr_t(bstr, true), norm);
    50         }
    51 
    52         wstring utf16_string(string str)
    53         {
    54             if (str.size() == 0)
    55                 return wstring();
    56 
    57             wstring result;
    58 
    59             int size = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.c_str(), -1, NULL, 0);
    60             assert(size);
    61             if (size) {
    62                 wchar_t * buf = new wchar_t[size];
    63                 MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.c_str(), -1, buf, size);
    64                 result = buf;
    65                 delete[] buf;
    66             }
    67             else
    68                 throw out_of_range("input string is not valid while converting UTF-8 to UTF-16.");
    69 
    70             return result;
    71         }
    72 
    73         _bstr_t utf16_bstr(string str)
    74         {
    75             return _bstr_t(utf16_string(str).c_str());
    76         }
    77 
    78         CComSafeArray<BSTR> string_array(const ::stringlist_t *stringlist)
    79         {
    80             CComSafeArray<BSTR> sa_string_list;
    81             int n = 0;
    82             for (const ::stringlist_t *k = stringlist; k != NULL; k = k->next) {
    83                 if (k->value) {
    84                     HRESULT _result = sa_string_list.Add(utf16_bstr(k->value).Detach(), false);
    85                     assert(_result == S_OK);
    86                     if (_result == E_OUTOFMEMORY)
    87                         throw std::bad_alloc();
    88                     ++n;
    89                 }
    90             }
    91 
    92             return sa_string_list;
    93         }
    94 
    95         ::stringlist_t * new_stringlist(const SAFEARRAY * safearray)
    96         {
    97             CComSafeArray<BSTR> sa(safearray);
    98             int n_strings = 0;
    99             ::stringlist_t *_stringlist = ::new_stringlist((const char *) NULL);
   100             assert(_stringlist);
   101             if (_stringlist == NULL)
   102                 throw std::bad_alloc();
   103 
   104             n_strings = sa.GetUpperBound() - sa.GetLowerBound() + 1;
   105             ::stringlist_t *k = _stringlist;
   106             for (int i = 0, j = sa.GetLowerBound(); i < n_strings; ++i, ++j) {
   107                 k = ::stringlist_add(k, utf8_string(sa.GetAt(j)).c_str());
   108                 assert(k);
   109                 if (k == NULL) {
   110                     ::free_stringlist(_stringlist);
   111                     throw std::bad_alloc();
   112                 }
   113             }
   114 
   115             return _stringlist;
   116         }
   117 
   118     }
   119 }