1 files changed, 168 insertions, 0 deletions
diff --git a/xpcom/base/nsINIParser.h b/xpcom/base/nsINIParser.h
new file mode 100644
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+++ b/xpcom/base/nsINIParser.h
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+/* -*- 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/. */
+
+// This file was shamelessly copied from mozilla/xpinstall/wizard/unix/src2
+
+#ifndef nsINIParser_h__
+#define nsINIParser_h__
+
+#ifdef MOZILLA_INTERNAL_API
+#  define nsINIParser nsINIParser_internal
+#endif
+
+#include "nscore.h"
+#include "nsClassHashtable.h"
+#include "mozilla/UniquePtr.h"
+
+#include <stdio.h>
+
+class nsIFile;
+
+class nsINIParser {
+ public:
+  nsINIParser() {}
+  ~nsINIParser() = default;
+
+  /**
+   * Initialize the INIParser with a nsIFile. If this method fails, no
+   * other methods should be called. This method reads and parses the file,
+   * the class does not hold a file handle open. An instance must only be
+   * initialized once.
+   */
+  nsresult Init(nsIFile* aFile);
+
+  nsresult InitFromString(const nsCString& aStr);
+
+  /**
+   * Callback for GetSections
+   * @return false to stop enumeration, or true to continue.
+   */
+  typedef bool (*INISectionCallback)(const char* aSection, void* aClosure);
+
+  /**
+   * Enumerate the sections within the INI file.
+   */
+  nsresult GetSections(INISectionCallback aCB, void* aClosure);
+
+  /**
+   * Callback for GetStrings
+   * @return false to stop enumeration, or true to continue
+   */
+  typedef bool (*INIStringCallback)(const char* aString, const char* aValue,
+                                    void* aClosure);
+
+  /**
+   * Enumerate the strings within a section. If the section does
+   * not exist, this function will silently return.
+   */
+  nsresult GetStrings(const char* aSection, INIStringCallback aCB,
+                      void* aClosure);
+
+  /**
+   * Get the value of the specified key in the specified section
+   * of the INI file represented by this instance.
+   *
+   * @param aSection      section name
+   * @param aKey          key name
+   * @param aResult       the value found
+   * @throws NS_ERROR_FAILURE if the specified section/key could not be
+   *                          found.
+   */
+  nsresult GetString(const char* aSection, const char* aKey,
+                     nsACString& aResult);
+
+  /**
+   * Alternate signature of GetString that uses a pre-allocated buffer
+   * instead of a nsACString (for use in the standalone glue before
+   * the glue is initialized).
+   *
+   * @throws NS_ERROR_LOSS_OF_SIGNIFICANT_DATA if the aResult buffer is not
+   *         large enough for the data. aResult will be filled with as
+   *         much data as possible.
+   *
+   * @see GetString [1]
+   */
+  nsresult GetString(const char* aSection, const char* aKey, char* aResult,
+                     uint32_t aResultLen);
+
+  /**
+   * Sets the value of the specified key in the specified section. The section
+   * is created if it does not already exist.
+   *
+   * @oaram aSection      section name
+   * @param aKey          key name
+   * @param aValue        the value to set
+   */
+  nsresult SetString(const char* aSection, const char* aKey,
+                     const char* aValue);
+
+  /**
+   * Deletes the value of the specified key in the specified section.
+   *
+   * @param aSection      section name
+   * @param aKey          key name
+   *
+   * @throws NS_ERROR_FAILURE if the string was not set.
+   */
+  nsresult DeleteString(const char* aSection, const char* aKey);
+
+  /**
+   * Deletes the specified section.
+   *
+   * @param aSection      section name
+   *
+   * @throws NS_ERROR_FAILURE if the section did not exist.
+   */
+  nsresult DeleteSection(const char* aSection);
+
+  /**
+   * Renames the specified section.
+   *
+   * @param aSection      section name
+   * @param aNewName      new section name
+   *
+   * @throws NS_ERROR_FAILURE if the section did not exist.
+   * @throws NS_ERROR_ILLEGAL_VALUE if the new section name already exists.
+   */
+  nsresult RenameSection(const char* aSection, const char* aNewName);
+
+  /**
+   * Writes the ini data to disk.
+   * @param aFile         the file to write to
+   * @throws NS_ERROR_FAILURE on failure.
+   */
+  nsresult WriteToFile(nsIFile* aFile);
+
+  void WriteToString(nsACString& aOutput);
+
+ private:
+  struct INIValue {
+    INIValue(const char* aKey, const char* aValue)
+        : key(strdup(aKey)), value(strdup(aValue)) {}
+
+    ~INIValue() {
+      delete key;
+      delete value;
+    }
+
+    void SetValue(const char* aValue) {
+      delete value;
+      value = strdup(aValue);
+    }
+
+    const char* key;
+    const char* value;
+    mozilla::UniquePtr<INIValue> next;
+  };
+
+  nsClassHashtable<nsCharPtrHashKey, INIValue> mSections;
+
+  bool IsValidSection(const char* aSection);
+  bool IsValidKey(const char* aKey);
+  bool IsValidValue(const char* aValue);
+};
+
+#endif /* nsINIParser_h__ */