1 files changed, 331 insertions, 0 deletions
diff --git a/xpcom/glue/nsINIParser.cpp b/xpcom/glue/nsINIParser.cpp
new file mode 100644
index 000000000..53eae7292
--- /dev/null
+++ b/xpcom/glue/nsINIParser.cpp
@@ -0,0 +1,331 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Moz headers (alphabetical)
+#include "nsCRTGlue.h"
+#include "nsError.h"
+#include "nsIFile.h"
+#include "nsINIParser.h"
+#include "mozilla/FileUtils.h" // AutoFILE
+
+// System headers (alphabetical)
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef XP_WIN
+#include <windows.h>
+#endif
+
+#if defined(XP_WIN)
+#define READ_BINARYMODE L"rb"
+#else
+#define READ_BINARYMODE "r"
+#endif
+
+using namespace mozilla;
+
+#ifdef XP_WIN
+inline FILE*
+TS_tfopen(const char* aPath, const wchar_t* aMode)
+{
+  wchar_t wPath[MAX_PATH];
+  MultiByteToWideChar(CP_UTF8, 0, aPath, -1, wPath, MAX_PATH);
+  return _wfopen(wPath, aMode);
+}
+#else
+inline FILE*
+TS_tfopen(const char* aPath, const char* aMode)
+{
+  return fopen(aPath, aMode);
+}
+#endif
+
+// Stack based FILE wrapper to ensure that fclose is called, copied from
+// toolkit/mozapps/update/updater/readstrings.cpp
+
+class AutoFILE
+{
+public:
+  explicit AutoFILE(FILE* aFp = nullptr) : fp_(aFp) {}
+  ~AutoFILE()
+  {
+    if (fp_) {
+      fclose(fp_);
+    }
+  }
+  operator FILE*() { return fp_; }
+  FILE** operator&() { return &fp_; }
+  void operator=(FILE* aFp) { fp_ = aFp; }
+private:
+  FILE* fp_;
+};
+
+nsresult
+nsINIParser::Init(nsIFile* aFile)
+{
+  /* open the file. Don't use OpenANSIFileDesc, because you mustn't
+     pass FILE* across shared library boundaries, which may be using
+     different CRTs */
+
+  AutoFILE fd;
+
+#ifdef XP_WIN
+  nsAutoString path;
+  nsresult rv = aFile->GetPath(path);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  fd = _wfopen(path.get(), READ_BINARYMODE);
+#else
+  nsAutoCString path;
+  aFile->GetNativePath(path);
+
+  fd = fopen(path.get(), READ_BINARYMODE);
+#endif
+
+  if (!fd) {
+    return NS_ERROR_FAILURE;
+  }
+
+  return InitFromFILE(fd);
+}
+
+nsresult
+nsINIParser::Init(const char* aPath)
+{
+  /* open the file */
+  AutoFILE fd(TS_tfopen(aPath, READ_BINARYMODE));
+  if (!fd) {
+    return NS_ERROR_FAILURE;
+  }
+
+  return InitFromFILE(fd);
+}
+
+static const char kNL[] = "\r\n";
+static const char kEquals[] = "=";
+static const char kWhitespace[] = " \t";
+static const char kRBracket[] = "]";
+
+nsresult
+nsINIParser::InitFromFILE(FILE* aFd)
+{
+  /* get file size */
+  if (fseek(aFd, 0, SEEK_END) != 0) {
+    return NS_ERROR_FAILURE;
+  }
+
+  long flen = ftell(aFd);
+  /* zero-sized file, or an error */
+  if (flen <= 0) {
+    return NS_ERROR_FAILURE;
+  }
+
+  /* malloc an internal buf the size of the file */
+  mFileContents = MakeUnique<char[]>(flen + 2);
+  if (!mFileContents) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  /* read the file in one swoop */
+  if (fseek(aFd, 0, SEEK_SET) != 0) {
+    return NS_BASE_STREAM_OSERROR;
+  }
+
+  int rd = fread(mFileContents.get(), sizeof(char), flen, aFd);
+  if (rd != flen) {
+    return NS_BASE_STREAM_OSERROR;
+  }
+
+  // We write a UTF16 null so that the file is easier to convert to UTF8
+  mFileContents[flen] = mFileContents[flen + 1] = '\0';
+
+  char* buffer = &mFileContents[0];
+
+  if (flen >= 3 &&
+      mFileContents[0] == '\xEF' &&
+      mFileContents[1] == '\xBB' &&
+      mFileContents[2] == '\xBF') {
+    // Someone set us up the Utf-8 BOM
+    // This case is easy, since we assume that BOM-less
+    // files are Utf-8 anyway.  Just skip the BOM and process as usual.
+    buffer = &mFileContents[3];
+  }
+
+#ifdef XP_WIN
+  if (flen >= 2 &&
+      mFileContents[0] == '\xFF' &&
+      mFileContents[1] == '\xFE') {
+    // Someone set us up the Utf-16LE BOM
+    buffer = &mFileContents[2];
+    // Get the size required for our Utf8 buffer
+    flen = WideCharToMultiByte(CP_UTF8,
+                               0,
+                               reinterpret_cast<LPWSTR>(buffer),
+                               -1,
+                               nullptr,
+                               0,
+                               nullptr,
+                               nullptr);
+    if (flen == 0) {
+      return NS_ERROR_FAILURE;
+    }
+
+    UniquePtr<char[]> utf8Buffer(new char[flen]);
+    if (WideCharToMultiByte(CP_UTF8, 0, reinterpret_cast<LPWSTR>(buffer), -1,
+                            utf8Buffer.get(), flen, nullptr, nullptr) == 0) {
+      return NS_ERROR_FAILURE;
+    }
+    mFileContents = Move(utf8Buffer);
+    buffer = mFileContents.get();
+  }
+#endif
+
+  char* currSection = nullptr;
+
+  // outer loop tokenizes into lines
+  while (char* token = NS_strtok(kNL, &buffer)) {
+    if (token[0] == '#' || token[0] == ';') { // it's a comment
+      continue;
+    }
+
+    token = (char*)NS_strspnp(kWhitespace, token);
+    if (!*token) { // empty line
+      continue;
+    }
+
+    if (token[0] == '[') { // section header!
+      ++token;
+      currSection = token;
+
+      char* rb = NS_strtok(kRBracket, &token);
+      if (!rb || NS_strtok(kWhitespace, &token)) {
+        // there's either an unclosed [Section or a [Section]Moretext!
+        // we could frankly decide that this INI file is malformed right
+        // here and stop, but we won't... keep going, looking for
+        // a well-formed [section] to continue working with
+        currSection = nullptr;
+      }
+
+      continue;
+    }
+
+    if (!currSection) {
+      // If we haven't found a section header (or we found a malformed
+      // section header), don't bother parsing this line.
+      continue;
+    }
+
+    char* key = token;
+    char* e = NS_strtok(kEquals, &token);
+    if (!e || !token) {
+      continue;
+    }
+
+    INIValue* v;
+    if (!mSections.Get(currSection, &v)) {
+      v = new INIValue(key, token);
+      if (!v) {
+        return NS_ERROR_OUT_OF_MEMORY;
+      }
+
+      mSections.Put(currSection, v);
+      continue;
+    }
+
+    // Check whether this key has already been specified; overwrite
+    // if so, or append if not.
+    while (v) {
+      if (!strcmp(key, v->key)) {
+        v->value = token;
+        break;
+      }
+      if (!v->next) {
+        v->next = MakeUnique<INIValue>(key, token);
+        if (!v->next) {
+          return NS_ERROR_OUT_OF_MEMORY;
+        }
+        break;
+      }
+      v = v->next.get();
+    }
+    NS_ASSERTION(v, "v should never be null coming out of this loop");
+  }
+
+  return NS_OK;
+}
+
+nsresult
+nsINIParser::GetString(const char* aSection, const char* aKey,
+                       nsACString& aResult)
+{
+  INIValue* val;
+  mSections.Get(aSection, &val);
+
+  while (val) {
+    if (strcmp(val->key, aKey) == 0) {
+      aResult.Assign(val->value);
+      return NS_OK;
+    }
+
+    val = val->next.get();
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+nsresult
+nsINIParser::GetString(const char* aSection, const char* aKey,
+                       char* aResult, uint32_t aResultLen)
+{
+  INIValue* val;
+  mSections.Get(aSection, &val);
+
+  while (val) {
+    if (strcmp(val->key, aKey) == 0) {
+      strncpy(aResult, val->value, aResultLen);
+      aResult[aResultLen - 1] = '\0';
+      if (strlen(val->value) >= aResultLen) {
+        return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
+      }
+
+      return NS_OK;
+    }
+
+    val = val->next.get();
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+nsresult
+nsINIParser::GetSections(INISectionCallback aCB, void* aClosure)
+{
+  for (auto iter = mSections.Iter(); !iter.Done(); iter.Next()) {
+    if (!aCB(iter.Key(), aClosure)) {
+      break;
+    }
+  }
+  return NS_OK;
+}
+
+nsresult
+nsINIParser::GetStrings(const char* aSection,
+                        INIStringCallback aCB, void* aClosure)
+{
+  INIValue* val;
+
+  for (mSections.Get(aSection, &val);
+       val;
+       val = val->next.get()) {
+
+    if (!aCB(val->key, val->value, aClosure)) {
+      return NS_OK;
+    }
+  }
+
+  return NS_OK;
+}