gecko-dev/xpcom/glue/nsINIParser.h
2012-05-21 12:12:37 +01:00

126 lines
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "nsAutoPtr.h"
#include <stdio.h>
class nsILocalFile;
class NS_COM_GLUE nsINIParser
{
public:
nsINIParser() { }
~nsINIParser() { }
/**
* Initialize the INIParser with a nsILocalFile. 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(nsILocalFile* aFile);
/**
* Initialize the INIParser with a file path. 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(const char *aPath);
/**
* 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, PRUint32 aResultLen);
private:
struct INIValue
{
INIValue(const char *aKey, const char *aValue)
: key(aKey), value(aValue) { }
const char *key;
const char *value;
nsAutoPtr<INIValue> next;
};
struct GSClosureStruct
{
INISectionCallback usercb;
void *userclosure;
};
nsClassHashtable<nsDepCharHashKey, INIValue> mSections;
nsAutoArrayPtr<char> mFileContents;
nsresult InitFromFILE(FILE *fd);
static PLDHashOperator GetSectionsCB(const char *aKey,
INIValue *aData, void *aClosure);
};
#endif /* nsINIParser_h__ */