warutf8.cpp

来自「ftpserver very good sample」· C++ 代码 · 共 84 行

#include "StdAfx.h"
#include "WarUnicode.h"
#include "WarUtf8.h"   // class implemented

#ifndef WAR_MALLOC_H_INCLUDED
#   define WAR_MALLOC_H_INCLUDED
#   include <malloc.h>
#endif

#ifndef WAR_WCHAR_T_INCLUDED
#   define WAR_WCHAR_T_INCLUDED
#   include<wchar.h>
#endif


#ifndef WAR_EXCEPTION_H
#   include "WarException.h"
#endif

/////////////////////////////// PUBLIC ///////////////////////////////////////

//============================= LIFECYCLE ====================================




//============================= OPERATORS ====================================



//============================= OPERATIONS ===================================
//============================= ACCESS     ===================================
//============================= INQUIRY    ===================================


bool WarUtf8::IsUtf8(const war_ccstr_t from)
{
    if (!from || !*from)
        return false;

    return war_utf8_valid((const unsigned char *)from, strlen(from));
}

bool WarUtf8::IsUtf8(const std::string& from)
{
    if (from.empty())
        return false;

    return war_utf8_valid((const unsigned char *)from.c_str(), 
        from.length());
}



/////////////////////////////// PROTECTED  ///////////////////////////////////

/////////////////////////////// PRIVATE    ///////////////////////////////////

void WarUtf8::ToUnicode(war_ccstr_t from)
{
    size_t from_len = strlen(from);
    wchar_t *pwide_buf = (wchar_t *)alloca((from_len +1) * sizeof(wchar_t));
    int result = war_utf8_to_ucs4(pwide_buf, from_len, (const unsigned char *)from);
    if (result <= 0)
        WarThrow(WarError(WAR_CHRCNV_NOT_UTF8), NULL);

    pwide_buf[result] = 0;
    mUtf8Encoded = from;
    mUnicode = pwide_buf;
}

void WarUtf8::ToUtf8(const war_cwstr_t from)
{
    size_t from_len = wcslen(from);
    unsigned char *pnarrow_buf = 
        (unsigned char *)alloca((from_len +1) * 6);
    size_t result = war_ucs4_to_utf8(from, from_len, pnarrow_buf);   

    pnarrow_buf[result] = 0;
    mUnicode = from;
    mUtf8Encoded = (war_ccstr_t)pnarrow_buf;
}