331 lines
7.5 KiB
C++
331 lines
7.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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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// Moz headers (alphabetical)
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#include "nsCRTGlue.h"
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#include "nsError.h"
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#include "nsIFile.h"
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#include "nsINIParser.h"
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#include "mozilla/FileUtils.h" // AutoFILE
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// System headers (alphabetical)
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef XP_WIN
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#include <windows.h>
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#endif
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#if defined(XP_WIN)
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#define READ_BINARYMODE L"rb"
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#else
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#define READ_BINARYMODE "r"
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#endif
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using namespace mozilla;
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#ifdef XP_WIN
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inline FILE*
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TS_tfopen(const char* aPath, const wchar_t* aMode)
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{
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wchar_t wPath[MAX_PATH];
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MultiByteToWideChar(CP_UTF8, 0, aPath, -1, wPath, MAX_PATH);
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return _wfopen(wPath, aMode);
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}
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#else
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inline FILE*
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TS_tfopen(const char* aPath, const char* aMode)
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{
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return fopen(aPath, aMode);
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}
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#endif
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// Stack based FILE wrapper to ensure that fclose is called, copied from
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// toolkit/mozapps/update/updater/readstrings.cpp
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class AutoFILE
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{
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public:
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explicit AutoFILE(FILE* aFp = nullptr) : fp_(aFp) {}
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~AutoFILE()
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{
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if (fp_) {
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fclose(fp_);
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}
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}
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operator FILE*() { return fp_; }
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FILE** operator&() { return &fp_; }
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void operator=(FILE* aFp) { fp_ = aFp; }
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private:
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FILE* fp_;
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};
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nsresult
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nsINIParser::Init(nsIFile* aFile)
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{
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/* open the file. Don't use OpenANSIFileDesc, because you mustn't
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pass FILE* across shared library boundaries, which may be using
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different CRTs */
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AutoFILE fd;
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#ifdef XP_WIN
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nsAutoString path;
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nsresult rv = aFile->GetPath(path);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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fd = _wfopen(path.get(), READ_BINARYMODE);
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#else
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nsAutoCString path;
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aFile->GetNativePath(path);
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fd = fopen(path.get(), READ_BINARYMODE);
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#endif
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if (!fd) {
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return NS_ERROR_FAILURE;
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}
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return InitFromFILE(fd);
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}
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nsresult
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nsINIParser::Init(const char* aPath)
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{
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/* open the file */
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AutoFILE fd(TS_tfopen(aPath, READ_BINARYMODE));
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if (!fd) {
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return NS_ERROR_FAILURE;
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}
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return InitFromFILE(fd);
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}
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static const char kNL[] = "\r\n";
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static const char kEquals[] = "=";
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static const char kWhitespace[] = " \t";
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static const char kRBracket[] = "]";
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nsresult
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nsINIParser::InitFromFILE(FILE* aFd)
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{
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/* get file size */
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if (fseek(aFd, 0, SEEK_END) != 0) {
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return NS_ERROR_FAILURE;
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}
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long flen = ftell(aFd);
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/* zero-sized file, or an error */
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if (flen <= 0) {
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return NS_ERROR_FAILURE;
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}
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/* malloc an internal buf the size of the file */
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mFileContents = MakeUnique<char[]>(flen + 2);
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if (!mFileContents) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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/* read the file in one swoop */
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if (fseek(aFd, 0, SEEK_SET) != 0) {
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return NS_BASE_STREAM_OSERROR;
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}
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int rd = fread(mFileContents.get(), sizeof(char), flen, aFd);
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if (rd != flen) {
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return NS_BASE_STREAM_OSERROR;
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}
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// We write a UTF16 null so that the file is easier to convert to UTF8
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mFileContents[flen] = mFileContents[flen + 1] = '\0';
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char* buffer = &mFileContents[0];
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if (flen >= 3 &&
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mFileContents[0] == '\xEF' &&
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mFileContents[1] == '\xBB' &&
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mFileContents[2] == '\xBF') {
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// Someone set us up the Utf-8 BOM
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// This case is easy, since we assume that BOM-less
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// files are Utf-8 anyway. Just skip the BOM and process as usual.
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buffer = &mFileContents[3];
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}
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#ifdef XP_WIN
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if (flen >= 2 &&
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mFileContents[0] == '\xFF' &&
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mFileContents[1] == '\xFE') {
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// Someone set us up the Utf-16LE BOM
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buffer = &mFileContents[2];
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// Get the size required for our Utf8 buffer
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flen = WideCharToMultiByte(CP_UTF8,
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0,
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reinterpret_cast<LPWSTR>(buffer),
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-1,
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nullptr,
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0,
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nullptr,
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nullptr);
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if (flen == 0) {
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return NS_ERROR_FAILURE;
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}
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UniquePtr<char[]> utf8Buffer(new char[flen]);
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if (WideCharToMultiByte(CP_UTF8, 0, reinterpret_cast<LPWSTR>(buffer), -1,
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utf8Buffer.get(), flen, nullptr, nullptr) == 0) {
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return NS_ERROR_FAILURE;
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}
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mFileContents = Move(utf8Buffer);
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buffer = mFileContents.get();
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}
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#endif
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char* currSection = nullptr;
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// outer loop tokenizes into lines
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while (char* token = NS_strtok(kNL, &buffer)) {
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if (token[0] == '#' || token[0] == ';') { // it's a comment
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continue;
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}
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token = (char*)NS_strspnp(kWhitespace, token);
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if (!*token) { // empty line
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continue;
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}
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if (token[0] == '[') { // section header!
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++token;
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currSection = token;
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char* rb = NS_strtok(kRBracket, &token);
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if (!rb || NS_strtok(kWhitespace, &token)) {
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// there's either an unclosed [Section or a [Section]Moretext!
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// we could frankly decide that this INI file is malformed right
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// here and stop, but we won't... keep going, looking for
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// a well-formed [section] to continue working with
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currSection = nullptr;
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}
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continue;
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}
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if (!currSection) {
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// If we haven't found a section header (or we found a malformed
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// section header), don't bother parsing this line.
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continue;
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}
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char* key = token;
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char* e = NS_strtok(kEquals, &token);
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if (!e || !token) {
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continue;
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}
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INIValue* v;
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if (!mSections.Get(currSection, &v)) {
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v = new INIValue(key, token);
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if (!v) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mSections.Put(currSection, v);
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continue;
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}
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// Check whether this key has already been specified; overwrite
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// if so, or append if not.
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while (v) {
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if (!strcmp(key, v->key)) {
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v->value = token;
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break;
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}
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if (!v->next) {
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v->next = MakeUnique<INIValue>(key, token);
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if (!v->next) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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break;
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}
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v = v->next.get();
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}
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NS_ASSERTION(v, "v should never be null coming out of this loop");
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}
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return NS_OK;
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}
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nsresult
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nsINIParser::GetString(const char* aSection, const char* aKey,
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nsACString& aResult)
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{
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INIValue* val;
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mSections.Get(aSection, &val);
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while (val) {
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if (strcmp(val->key, aKey) == 0) {
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aResult.Assign(val->value);
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return NS_OK;
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}
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val = val->next.get();
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}
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return NS_ERROR_FAILURE;
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}
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nsresult
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nsINIParser::GetString(const char* aSection, const char* aKey,
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char* aResult, uint32_t aResultLen)
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{
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INIValue* val;
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mSections.Get(aSection, &val);
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while (val) {
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if (strcmp(val->key, aKey) == 0) {
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strncpy(aResult, val->value, aResultLen);
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aResult[aResultLen - 1] = '\0';
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if (strlen(val->value) >= aResultLen) {
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return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
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}
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return NS_OK;
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}
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val = val->next.get();
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}
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return NS_ERROR_FAILURE;
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}
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nsresult
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nsINIParser::GetSections(INISectionCallback aCB, void* aClosure)
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{
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for (auto iter = mSections.Iter(); !iter.Done(); iter.Next()) {
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if (!aCB(iter.Key(), aClosure)) {
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break;
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}
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}
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return NS_OK;
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}
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nsresult
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nsINIParser::GetStrings(const char* aSection,
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INIStringCallback aCB, void* aClosure)
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{
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INIValue* val;
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for (mSections.Get(aSection, &val);
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val;
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val = val->next.get()) {
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if (!aCB(val->key, val->value, aClosure)) {
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return NS_OK;
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}
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}
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return NS_OK;
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}
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