The Tor Browser: intl/lwbrk/src/nsUniscribeBreaker.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsComplexBreaker.h"

     8 #include <windows.h>

    10 #include <usp10.h>

    12 #include "nsUTF8Utils.h"

    13 #include "nsString.h"

    14 #include "nsTArray.h"

    16 void

    17 NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,

    18                         uint8_t* aBreakBefore)

    19 {

    20   NS_ASSERTION(aText, "aText shouldn't be null");

    22   int outItems = 0;

    23   HRESULT result;

    24   nsAutoTArray<SCRIPT_ITEM, 64> items;

    25   char16ptr_t text = aText;

    27   memset(aBreakBefore, false, aLength);

    29   if (!items.AppendElements(64))

    30     return;

    32   do {

    33     result = ScriptItemize(text, aLength, items.Length(), nullptr, nullptr,

    34                            items.Elements(), &outItems);

    36     if (result == E_OUTOFMEMORY) {

    37       if (!items.AppendElements(items.Length()))

    38         return;

    39     }

    40   } while (result == E_OUTOFMEMORY);

    42   for (int iItem = 0; iItem < outItems; ++iItem)  {

    43     uint32_t endOffset = (iItem + 1 == outItems ? aLength : items[iItem + 1].iCharPos);

    44     uint32_t startOffset = items[iItem].iCharPos;

    45     nsAutoTArray<SCRIPT_LOGATTR, 64> sla;

    47     if (!sla.AppendElements(endOffset - startOffset))

    48       return;

    50     if (ScriptBreak(text + startOffset, endOffset - startOffset,

    51                     &items[iItem].a,  sla.Elements()) < 0)

    52       return;

    54     for (uint32_t j=0; j+startOffset < endOffset; ++j) {

    55        aBreakBefore[j+startOffset] = sla[j].fSoftBreak;

    56     }

    57   }

    58 }

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