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88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef fopen_hooks_h__
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#define fopen_hooks_h__
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/**
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* This file is force-included in hunspell code. Its purpose is to add
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* readahead to fopen() calls in hunspell without modifying its code, in order
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* to ease future upgrades.
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*
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* This file is force-included through mozilla-config.h which is generated
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* during the configure step.
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*/
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#include "mozilla/FileUtils.h"
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#include <stdio.h>
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#include <string.h>
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#if defined(XP_WIN)
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#include "nsNativeCharsetUtils.h"
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#include "nsString.h"
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#include <fcntl.h>
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#include <windows.h>
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// Hunspell defines a function named near. Windef.h #defines near.
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#undef near
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// mozHunspell defines a function named RemoveDirectory.
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#undef RemoveDirectory
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#endif /* defined(XP_WIN) */
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inline FILE*
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hunspell_fopen_readahead(const char* filename, const char* mode)
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{
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if (!filename || !mode) {
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return nullptr;
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}
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// Fall back to libc's fopen for modes not supported by ReadAheadFile
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if (!strchr(mode, 'r') || strchr(mode, '+')) {
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return fopen(filename, mode);
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}
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int fd = -1;
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#if defined(XP_WIN)
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// filename is obtained via the nsIFile::nativePath attribute, so
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// it is using the Windows ANSI code page, NOT UTF-8!
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nsAutoString utf16Filename;
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nsresult rv = NS_CopyNativeToUnicode(nsDependentCString(filename),
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utf16Filename);
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if (NS_FAILED(rv)) {
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return nullptr;
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}
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HANDLE handle = INVALID_HANDLE_VALUE;
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mozilla::ReadAheadFile(utf16Filename.get(), 0, SIZE_MAX, &handle);
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if (handle == INVALID_HANDLE_VALUE) {
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return nullptr;
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}
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int flags = _O_RDONLY;
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// MSVC CRT's _open_osfhandle only supports adding _O_TEXT, not _O_BINARY
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if (strchr(mode, 't')) {
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// Force translated mode
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flags |= _O_TEXT;
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}
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// Import the Win32 fd into the CRT
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fd = _open_osfhandle((intptr_t)handle, flags);
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if (fd < 0) {
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CloseHandle(handle);
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return nullptr;
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}
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#else
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mozilla::ReadAheadFile(filename, 0, SIZE_MAX, &fd);
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if (fd < 0) {
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return nullptr;
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}
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#endif /* defined(XP_WIN) */
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FILE* file = fdopen(fd, mode);
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if (!file) {
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close(fd);
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}
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return file;
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}
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#define fopen(filename, mode) hunspell_fopen_readahead(filename, mode)
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#endif /* fopen_hooks_h__ */
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