xpcom/io/nsNativeCharsetUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 //-----------------------------------------------------------------------------
   8 // Non-Windows
   9 //-----------------------------------------------------------------------------
  10 #ifndef XP_WIN
  11
  12 #  include "nsAString.h"
  13 #  include "nsReadableUtils.h"
  14 #  include "nsString.h"
  15
  16 nsresult NS_CopyNativeToUnicode(const nsACString& aInput, nsAString& aOutput) {
  17   CopyUTF8toUTF16(aInput, aOutput);
  18   return NS_OK;
  19 }
  20
  21 nsresult NS_CopyUnicodeToNative(const nsAString& aInput, nsACString& aOutput) {
  22   CopyUTF16toUTF8(aInput, aOutput);
  23   return NS_OK;
  24 }
  25
  26 //-----------------------------------------------------------------------------
  27 // XP_WIN
  28 //-----------------------------------------------------------------------------
  29 #else
  30
  31 #  include <windows.h>
  32 #  include "nsString.h"
  33 #  include "nsAString.h"
  34 #  include "nsReadableUtils.h"
  35
  36 using namespace mozilla;
  37
  38 nsresult NS_CopyNativeToUnicode(const nsACString& aInput, nsAString& aOutput) {
  39   uint32_t inputLen = aInput.Length();
  40
  41   nsACString::const_iterator iter;
  42   aInput.BeginReading(iter);
  43
  44   const char* buf = iter.get();
  45
  46   // determine length of result
  47   uint32_t resultLen = 0;
  48   int n = ::MultiByteToWideChar(CP_ACP, 0, buf, inputLen, nullptr, 0);
  49   if (n > 0) {
  50     resultLen += n;
  51   }
  52
  53   // allocate sufficient space
  54   if (!aOutput.SetLength(resultLen, fallible)) {
  55     return NS_ERROR_OUT_OF_MEMORY;
  56   }
  57   if (resultLen > 0) {
  58     char16ptr_t result = aOutput.BeginWriting();
  59     ::MultiByteToWideChar(CP_ACP, 0, buf, inputLen, result, resultLen);
  60   }
  61   return NS_OK;
  62 }
  63
  64 nsresult NS_CopyUnicodeToNative(const nsAString& aInput, nsACString& aOutput) {
  65   uint32_t inputLen = aInput.Length();
  66
  67   nsAString::const_iterator iter;
  68   aInput.BeginReading(iter);
  69
  70   char16ptr_t buf = iter.get();
  71
  72   // determine length of result
  73   uint32_t resultLen = 0;
  74
  75   int n = ::WideCharToMultiByte(CP_ACP, 0, buf, inputLen, nullptr, 0, nullptr,
  76                                 nullptr);
  77   if (n > 0) {
  78     resultLen += n;
  79   }
  80
  81   // allocate sufficient space
  82   if (!aOutput.SetLength(resultLen, fallible)) {
  83     return NS_ERROR_OUT_OF_MEMORY;
  84   }
  85   if (resultLen > 0) {
  86     char* result = aOutput.BeginWriting();
  87
  88     // default "defaultChar" is '?', which is an illegal character on windows
  89     // file system.  That will cause file uncreatable. Change it to '_'
  90     const char defaultChar = '_';
  91
  92     ::WideCharToMultiByte(CP_ACP, 0, buf, inputLen, result, resultLen,
  93                           &defaultChar, nullptr);
  94   }
  95   return NS_OK;
  96 }
  97
  98 #endif