зеркало из https://github.com/mozilla/pjs.git
327 строки
12 KiB
C
327 строки
12 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** 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 the Netscape Portable Runtime (NSPR).
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998-2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* 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 prerror_h___
|
|
#define prerror_h___
|
|
|
|
#include "prtypes.h"
|
|
|
|
PR_BEGIN_EXTERN_C
|
|
|
|
typedef PRInt32 PRErrorCode;
|
|
|
|
#define PR_NSPR_ERROR_BASE -6000
|
|
|
|
#include "prerr.h"
|
|
|
|
/*
|
|
** Set error will preserve an error condition within a thread context.
|
|
** The values stored are the NSPR (platform independent) translation of
|
|
** the error. Also, if available, the platform specific oserror is stored.
|
|
** If there is no appropriate OS error number, a zero my be supplied.
|
|
*/
|
|
NSPR_API(void) PR_SetError(PRErrorCode errorCode, PRInt32 oserr);
|
|
|
|
/*
|
|
** The text value specified may be NULL. If it is not NULL and the text length
|
|
** is zero, the string is assumed to be a null terminated C string. Otherwise
|
|
** the text is assumed to be the length specified and possibly include NULL
|
|
** characters (e.g., a multi-national string).
|
|
**
|
|
** The text will be copied into to thread structure and remain there
|
|
** until the next call to PR_SetError.
|
|
*/
|
|
NSPR_API(void) PR_SetErrorText(
|
|
PRIntn textLength, const char *text);
|
|
|
|
/*
|
|
** Return the current threads last set error code.
|
|
*/
|
|
NSPR_API(PRErrorCode) PR_GetError(void);
|
|
|
|
/*
|
|
** Return the current threads last set os error code. This is used for
|
|
** machine specific code that desires the underlying os error.
|
|
*/
|
|
NSPR_API(PRInt32) PR_GetOSError(void);
|
|
|
|
/*
|
|
** Get the length of the error text. If a zero is returned, then there
|
|
** is no text. Otherwise, the value returned is sufficient to contain
|
|
** the error text currently available.
|
|
*/
|
|
NSPR_API(PRInt32) PR_GetErrorTextLength(void);
|
|
|
|
/*
|
|
** Copy the current threads current error text. Then actual number of bytes
|
|
** copied is returned as the result. If the result is zero, the 'text' area
|
|
** is unaffected.
|
|
*/
|
|
NSPR_API(PRInt32) PR_GetErrorText(char *text);
|
|
|
|
|
|
/*
|
|
Copyright (C) 1987, 1988 Student Information Processing Board of the
|
|
Massachusetts Institute of Technology.
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted, provided
|
|
that the above copyright notice appear in all copies and that both that
|
|
copyright notice and this permission notice appear in supporting
|
|
documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
|
|
used in advertising or publicity pertaining to distribution of the software
|
|
without specific, written prior permission. M.I.T. and the M.I.T. S.I.P.B.
|
|
make no representations about the suitability of this software for any
|
|
purpose. It is provided "as is" without express or implied warranty.
|
|
*/
|
|
|
|
|
|
/*
|
|
* NOTE:
|
|
* The interfaces for error-code-translation described in the rest of
|
|
* this file are preliminary in the 3.1 release of nspr and are subject
|
|
* to change in future releases.
|
|
*/
|
|
|
|
/*
|
|
** Description: Localizable error code to string function.
|
|
**
|
|
**
|
|
** NSPR provides a mechanism for converting an error code to a
|
|
** descriptive string, in a caller-specified language.
|
|
**
|
|
** Error codes themselves are 32 bit (signed) integers. Typically,
|
|
** the high order 24 bits are an identifier of which error table the
|
|
** error code is from, and the low order 8 bits are a sequential error
|
|
** number within the table. NSPR supports error tables whose first
|
|
** error code is not a multiple of 256, such error code assignments
|
|
** should be avoided when possible.
|
|
**
|
|
** Error table 0 is defined to match the UNIX system call error table
|
|
** (sys_errlist); this allows errno values to be used directly in the
|
|
** library. Other error table numbers are typically formed by
|
|
** compacting together the first four characters of the error table
|
|
** name. The mapping between characters in the name and numeric
|
|
** values in the error code are defined in a system-independent
|
|
** fashion, so that two systems that can pass integral values between
|
|
** them can reliably pass error codes without loss of meaning; this
|
|
** should work even if the character sets used are not the
|
|
** same. (However, if this is to be done, error table 0 should be
|
|
** avoided, since the local system call error tables may differ.)
|
|
**
|
|
** Libraries defining error codes need only provide a table mapping
|
|
** error code numbers to names and default English descriptions,
|
|
** calling a routine to install the table, making it ``known'' to NSPR
|
|
** library. Once installed, a table may not be removed. Any error
|
|
** code the library generates can be converted to the corresponding
|
|
** error message. There is also a default format for error codes
|
|
** accidentally returned before making the table known, which is of
|
|
** the form "unknown code foo 32", where "foo" would be the name of
|
|
** the table.
|
|
**
|
|
** Normally, the error code conversion routine only supports the
|
|
** languages "i-default" and "en", returning the error-table-provided
|
|
** English description for both languages. The application may
|
|
** provide a localization plugin, allowing support for additional
|
|
** languages.
|
|
**
|
|
**/
|
|
|
|
/**********************************************************************/
|
|
/************************* TYPES AND CONSTANTS ************************/
|
|
/**********************************************************************/
|
|
|
|
/*
|
|
* PRLanguageCode --
|
|
*
|
|
* NSPR represents a language code as a non-negative integer.
|
|
* Languages 0 is always "i-default" the language you get without
|
|
* explicit negotiation. Language 1 is always "en", English
|
|
* which has been explicitly negotiated. Additional language
|
|
* codes are defined by an application-provided localization plugin.
|
|
*/
|
|
typedef PRUint32 PRLanguageCode;
|
|
#define PR_LANGUAGE_I_DEFAULT 0 /* i-default, the default language */
|
|
#define PR_LANGUAGE_EN 1 /* English, explicitly negotiated */
|
|
|
|
/*
|
|
* struct PRErrorMessage --
|
|
*
|
|
* An error message in an error table.
|
|
*/
|
|
struct PRErrorMessage {
|
|
const char * name; /* Macro name for error */
|
|
const char * en_text; /* Default English text */
|
|
};
|
|
|
|
/*
|
|
* struct PRErrorTable --
|
|
*
|
|
* An error table, provided by a library.
|
|
*/
|
|
struct PRErrorTable {
|
|
const struct PRErrorMessage * msgs; /* Array of error information */
|
|
const char *name; /* Name of error table source */
|
|
PRErrorCode base; /* Error code for first error in table */
|
|
int n_msgs; /* Number of codes in table */
|
|
};
|
|
|
|
/*
|
|
* struct PRErrorCallbackPrivate --
|
|
*
|
|
* A private structure for the localization plugin
|
|
*/
|
|
struct PRErrorCallbackPrivate;
|
|
|
|
/*
|
|
* struct PRErrorCallbackTablePrivate --
|
|
*
|
|
* A data structure under which the localization plugin may store information,
|
|
* associated with an error table, that is private to itself.
|
|
*/
|
|
struct PRErrorCallbackTablePrivate;
|
|
|
|
/*
|
|
* PRErrorCallbackLookupFn --
|
|
*
|
|
* A function of PRErrorCallbackLookupFn type is a localization
|
|
* plugin callback which converts an error code into a description
|
|
* in the requested language. The callback is provided the
|
|
* appropriate error table, private data for the plugin and the table.
|
|
* The callback returns the appropriate UTF-8 encoded description, or NULL
|
|
* if no description can be found.
|
|
*/
|
|
typedef const char *
|
|
PRErrorCallbackLookupFn(PRErrorCode code, PRLanguageCode language,
|
|
const struct PRErrorTable *table,
|
|
struct PRErrorCallbackPrivate *cb_private,
|
|
struct PRErrorCallbackTablePrivate *table_private);
|
|
|
|
/*
|
|
* PRErrorCallbackNewTableFn --
|
|
*
|
|
* A function PRErrorCallbackNewTableFn type is a localization plugin
|
|
* callback which is called once with each error table registered
|
|
* with NSPR. The callback is provided with the error table and
|
|
* the plugin's private structure. The callback returns any table private
|
|
* data it wishes to associate with the error table. Does not need to be thread
|
|
* safe.
|
|
*/
|
|
typedef struct PRErrorCallbackTablePrivate *
|
|
PRErrorCallbackNewTableFn(const struct PRErrorTable *table,
|
|
struct PRErrorCallbackPrivate *cb_private);
|
|
|
|
/**********************************************************************/
|
|
/****************************** FUNCTIONS *****************************/
|
|
/**********************************************************************/
|
|
|
|
/***********************************************************************
|
|
** FUNCTION: PR_ErrorToString
|
|
** DESCRIPTION:
|
|
** Returns the UTF-8 message for an error code in
|
|
** the requested language. May return the message
|
|
** in the default language if a translation in the requested
|
|
** language is not available. The returned string is
|
|
** valid for the duration of the process. Never returns NULL.
|
|
**
|
|
***********************************************************************/
|
|
NSPR_API(const char *) PR_ErrorToString(PRErrorCode code,
|
|
PRLanguageCode language);
|
|
|
|
|
|
/***********************************************************************
|
|
** FUNCTION: PR_ErrorToName
|
|
** DESCRIPTION:
|
|
** Returns the macro name for an error code, or NULL
|
|
** if the error code is not known. The returned string is
|
|
** valid for the duration of the process.
|
|
**
|
|
** Does not work for error table 0, the system error codes.
|
|
**
|
|
***********************************************************************/
|
|
NSPR_API(const char *) PR_ErrorToName(PRErrorCode code);
|
|
|
|
|
|
/***********************************************************************
|
|
** FUNCTION: PR_ErrorLanguages
|
|
** DESCRIPTION:
|
|
** Returns the RFC 1766 language tags for the language
|
|
** codes PR_ErrorToString() supports. The returned array is valid
|
|
** for the duration of the process. Never returns NULL. The first
|
|
** item in the returned array is the language tag for PRLanguageCode 0,
|
|
** the second is for PRLanguageCode 1, and so on. The array is terminated
|
|
** with a null pointer.
|
|
**
|
|
***********************************************************************/
|
|
NSPR_API(const char * const *) PR_ErrorLanguages(void);
|
|
|
|
|
|
/***********************************************************************
|
|
** FUNCTION: PR_ErrorInstallTable
|
|
** DESCRIPTION:
|
|
** Registers an error table with NSPR. Must be done exactly once per
|
|
** table. Memory pointed to by `table' must remain valid for the life
|
|
** of the process.
|
|
**
|
|
** NOT THREAD SAFE!
|
|
**
|
|
***********************************************************************/
|
|
NSPR_API(PRErrorCode) PR_ErrorInstallTable(const struct PRErrorTable *table);
|
|
|
|
|
|
/***********************************************************************
|
|
** FUNCTION: PR_ErrorInstallCallback
|
|
** DESCRIPTION:
|
|
** Registers an error localization plugin with NSPR. May be called
|
|
** at most one time. `languages' contains the language codes supported
|
|
** by this plugin. Languages 0 and 1 must be "i-default" and "en"
|
|
** respectively. `lookup' and `newtable' contain pointers to
|
|
** the plugin callback functions. `cb_private' contains any information
|
|
** private to the plugin functions.
|
|
**
|
|
** NOT THREAD SAFE!
|
|
**
|
|
***********************************************************************/
|
|
NSPR_API(void) PR_ErrorInstallCallback(const char * const * languages,
|
|
PRErrorCallbackLookupFn *lookup,
|
|
PRErrorCallbackNewTableFn *newtable,
|
|
struct PRErrorCallbackPrivate *cb_private);
|
|
|
|
PR_END_EXTERN_C
|
|
|
|
#endif /* prerror_h___ */
|