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prefread.h
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prefread.h
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.
*
* The Initial Developer of the Original Code is Darin Fisher.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef prefread_h__
#define prefread_h__
#include "prtypes.h"
#include "prefapi.h"
PR_BEGIN_EXTERN_C
/**
* Callback function used to notify consumer of preference name value pairs.
* The pref name and value must be copied by the implementor of the callback
* if they are needed beyond the scope of the callback function.
*
* @param closure
* user data passed to PREF_InitParseState
* @param pref
* preference name
* @param val
* preference value
* @param type
* preference type (PREF_STRING, PREF_INT, or PREF_BOOL)
* @param defPref
* preference type (PR_TRUE: default, PR_FALSE: user preference)
*/
typedef void (*PrefReader)(void *closure,
const char *pref,
PrefValue val,
PrefType type,
PRBool defPref);
/* structure fields are private */
typedef struct PrefParseState {
PrefReader reader;
void *closure;
int state; /* PREF_PARSE_... */
int nextstate; /* sometimes used... */
const char *smatch; /* string to match */
int sindex; /* next char of smatch to check */
/* also, counter in \u parsing */
PRUnichar utf16[2]; /* parsing UTF16 (\u) escape */
int esclen; /* length in esctmp */
char esctmp[6]; /* raw escape to put back if err */
char quotechar; /* char delimiter for quotations */
char *lb; /* line buffer (only allocation) */
char *lbcur; /* line buffer cursor */
char *lbend; /* line buffer end */
char *vb; /* value buffer (ptr into lb) */
PrefType vtype; /* PREF_STRING,INT,BOOL */
PRBool fdefault; /* PR_TRUE if (default) pref */
} PrefParseState;
/**
* PREF_InitParseState
*
* Called to initialize a PrefParseState instance.
*
* @param ps
* PrefParseState instance.
* @param reader
* PrefReader callback function, which will be called once for each
* preference name value pair extracted.
* @param closure
* PrefReader closure.
*/
void PREF_InitParseState(PrefParseState *ps, PrefReader reader, void *closure);
/**
* PREF_FinalizeParseState
*
* Called to release any memory in use by the PrefParseState instance.
*
* @param ps
* PrefParseState instance.
*/
void PREF_FinalizeParseState(PrefParseState *ps);
/**
* PREF_ParseBuf
*
* Called to parse a buffer containing some portion of a preference file. This
* function may be called repeatedly as new data is made available. The
* PrefReader callback function passed PREF_InitParseState will be called as
* preference name value pairs are extracted from the data.
*
* @param ps
* PrefParseState instance. Must have been initialized.
* @param buf
* Raw buffer containing data to be parsed.
* @param bufLen
* Length of buffer.
*
* @return PR_FALSE if buffer contains malformed content.
*/
PRBool PREF_ParseBuf(PrefParseState *ps, const char *buf, int bufLen);
PR_END_EXTERN_C
#endif /* prefread_h__ */