587 lines
18 KiB
C
587 lines
18 KiB
C
/* $Id$ */
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/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJ_ERRNO_H__
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#define __PJ_ERRNO_H__
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/**
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* @file errno.h
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* @brief PJLIB Error Subsystem
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*/
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#include <pj/types.h>
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#include <pj/compat/errno.h>
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#include <stdarg.h>
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PJ_BEGIN_DECL
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/**
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* @defgroup pj_errno Error Subsystem
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* @{
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*
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* The PJLIB Error Subsystem is a framework to unify all error codes
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* produced by all components into a single error space, and provide
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* uniform set of APIs to access them. With this framework, any error
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* codes are encoded as pj_status_t value. The framework is extensible,
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* application may register new error spaces to be recognized by
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* the framework.
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*
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* @section pj_errno_retval Return Values
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*
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* All functions that returns @a pj_status_t returns @a PJ_SUCCESS if the
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* operation was completed successfully, or non-zero value to indicate
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* error. If the error came from operating system, then the native error
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* code is translated/folded into PJLIB's error namespace by using
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* #PJ_STATUS_FROM_OS() macro. The function will do this automatically
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* before returning the error to caller.
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*
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* @section err_services Retrieving and Displaying Error Messages
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*
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* The framework provides the following APIs to retrieve and/or display
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* error messages:
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*
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* - #pj_strerror(): this is the base API to retrieve error string
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* description for the specified pj_status_t error code.
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*
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* - #PJ_PERROR() macro: use this macro similar to PJ_LOG to format
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* an error message and display them to the log
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*
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* - #pj_perror(): this function is similar to PJ_PERROR() but unlike
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* #PJ_PERROR(), this function will always be included in the
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* link process. Due to this reason, prefer to use #PJ_PERROR()
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* if the application is concerned about the executable size.
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*
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* Application MUST NOT pass native error codes (such as error code from
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* functions like GetLastError() or errno) to PJLIB functions expecting
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* @a pj_status_t.
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*
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* @section err_extending Extending the Error Space
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*
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* Application may register new error space to be recognized by the
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* framework by using #pj_register_strerror(). Use the range started
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* from PJ_ERRNO_START_USER to avoid conflict with existing error
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* spaces.
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*
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*/
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/**
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* Guidelines on error message length.
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*/
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#define PJ_ERR_MSG_SIZE 80
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/**
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* Buffer for title string of #PJ_PERROR().
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*/
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#ifndef PJ_PERROR_TITLE_BUF_SIZE
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# define PJ_PERROR_TITLE_BUF_SIZE 120
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#endif
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/**
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* Get the last platform error/status, folded into pj_status_t.
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* @return OS dependent error code, folded into pj_status_t.
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* @remark This function gets errno, or calls GetLastError() function and
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* convert the code into pj_status_t with PJ_STATUS_FROM_OS. Do
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* not call this for socket functions!
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* @see pj_get_netos_error()
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*/
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PJ_DECL(pj_status_t) pj_get_os_error(void);
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/**
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* Set last error.
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* @param code pj_status_t
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*/
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PJ_DECL(void) pj_set_os_error(pj_status_t code);
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/**
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* Get the last error from socket operations.
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* @return Last socket error, folded into pj_status_t.
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*/
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PJ_DECL(pj_status_t) pj_get_netos_error(void);
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/**
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* Set error code.
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* @param code pj_status_t.
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*/
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PJ_DECL(void) pj_set_netos_error(pj_status_t code);
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/**
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* Get the error message for the specified error code. The message
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* string will be NULL terminated.
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*
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* @param statcode The error code.
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* @param buf Buffer to hold the error message string.
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* @param bufsize Size of the buffer.
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*
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* @return The error message as NULL terminated string,
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* wrapped with pj_str_t.
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*/
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PJ_DECL(pj_str_t) pj_strerror( pj_status_t statcode,
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char *buf, pj_size_t bufsize);
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/**
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* A utility macro to print error message pertaining to the specified error
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* code to the log. This macro will construct the error message title
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* according to the 'title_fmt' argument, and add the error string pertaining
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* to the error code after the title string. A colon (':') will be added
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* automatically between the title and the error string.
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*
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* This function is similar to pj_perror() function, but has the advantage
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* that the function call can be omitted from the link process if the
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* log level argument is below PJ_LOG_MAX_LEVEL threshold.
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*
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* Note that the title string constructed from the title_fmt will be built on
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* a string buffer which size is PJ_PERROR_TITLE_BUF_SIZE, which normally is
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* allocated from the stack. By default this buffer size is small (around
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* 120 characters). Application MUST ensure that the constructed title string
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* will not exceed this limit, since not all platforms support truncating
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* the string.
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*
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* @see pj_perror()
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*
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* @param level The logging verbosity level, valid values are 0-6. Lower
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* number indicates higher importance, with level zero
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* indicates fatal error. Only numeral argument is
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* permitted (e.g. not variable).
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* @param arg Enclosed 'printf' like arguments, with the following
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* arguments:
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* - the sender (NULL terminated string),
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* - the error code (pj_status_t)
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* - the format string (title_fmt), and
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* - optional variable number of arguments suitable for the
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* format string.
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*
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* Sample:
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* \verbatim
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PJ_PERROR(2, (__FILE__, PJ_EBUSY, "Error making %s", "coffee"));
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\endverbatim
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* @hideinitializer
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*/
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#define PJ_PERROR(level,arg) do { \
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pj_perror_wrapper_##level(arg); \
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} while (0)
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/**
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* A utility function to print error message pertaining to the specified error
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* code to the log. This function will construct the error message title
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* according to the 'title_fmt' argument, and add the error string pertaining
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* to the error code after the title string. A colon (':') will be added
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* automatically between the title and the error string.
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*
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* Unlike the PJ_PERROR() macro, this function takes the \a log_level argument
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* as a normal argument, unlike in PJ_PERROR() where a numeral value must be
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* given. However this function will always be linked to the executable,
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* unlike PJ_PERROR() which can be omitted when the level is below the
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* PJ_LOG_MAX_LEVEL.
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*
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* Note that the title string constructed from the title_fmt will be built on
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* a string buffer which size is PJ_PERROR_TITLE_BUF_SIZE, which normally is
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* allocated from the stack. By default this buffer size is small (around
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* 120 characters). Application MUST ensure that the constructed title string
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* will not exceed this limit, since not all platforms support truncating
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* the string.
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*
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* @see PJ_PERROR()
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*/
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PJ_DECL(void) pj_perror(int log_level, const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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/**
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* Type of callback to be specified in #pj_register_strerror()
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*
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* @param e The error code to lookup.
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* @param msg Buffer to store the error message.
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* @param max Length of the buffer.
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*
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* @return The error string.
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*/
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typedef pj_str_t (*pj_error_callback)(pj_status_t e, char *msg, pj_size_t max);
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/**
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* Register strerror message handler for the specified error space.
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* Application can register its own handler to supply the error message
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* for the specified error code range. This handler will be called
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* by #pj_strerror().
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*
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* @param start_code The starting error code where the handler should
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* be called to retrieve the error message.
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* @param err_space The size of error space. The error code range then
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* will fall in start_code to start_code+err_space-1
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* range.
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* @param f The handler to be called when #pj_strerror() is
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* supplied with error code that falls into this range.
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*
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* @return PJ_SUCCESS or the specified error code. The
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* registration may fail when the error space has been
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* occupied by other handler, or when there are too many
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* handlers registered to PJLIB.
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*/
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PJ_DECL(pj_status_t) pj_register_strerror(pj_status_t start_code,
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pj_status_t err_space,
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pj_error_callback f);
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/**
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* @hideinitializer
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* Return platform os error code folded into pj_status_t code. This is
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* the macro that is used throughout the library for all PJLIB's functions
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* that returns error from operating system. Application may override
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* this macro to reduce size (e.g. by defining it to always return
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* #PJ_EUNKNOWN).
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*
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* Note:
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* This macro MUST return non-zero value regardless whether zero is
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* passed as the argument. The reason is to protect logic error when
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* the operating system doesn't report error codes properly.
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*
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* @param os_code Platform OS error code. This value may be evaluated
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* more than once.
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* @return The platform os error code folded into pj_status_t.
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*/
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#ifndef PJ_RETURN_OS_ERROR
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# define PJ_RETURN_OS_ERROR(os_code) (os_code ? \
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PJ_STATUS_FROM_OS(os_code) : -1)
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#endif
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/**
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* @hideinitializer
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* Fold a platform specific error into an pj_status_t code.
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*
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* @param e The platform os error code.
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* @return pj_status_t
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* @warning Macro implementation; the syserr argument may be evaluated
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* multiple times.
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*/
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#if PJ_NATIVE_ERR_POSITIVE
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# define PJ_STATUS_FROM_OS(e) (e == 0 ? PJ_SUCCESS : e + PJ_ERRNO_START_SYS)
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#else
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# define PJ_STATUS_FROM_OS(e) (e == 0 ? PJ_SUCCESS : PJ_ERRNO_START_SYS - e)
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#endif
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/**
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* @hideinitializer
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* Fold an pj_status_t code back to the native platform defined error.
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*
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* @param e The pj_status_t folded platform os error code.
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* @return pj_os_err_type
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* @warning macro implementation; the statcode argument may be evaluated
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* multiple times. If the statcode was not created by
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* pj_get_os_error or PJ_STATUS_FROM_OS, the results are undefined.
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*/
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#if PJ_NATIVE_ERR_POSITIVE
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# define PJ_STATUS_TO_OS(e) (e == 0 ? PJ_SUCCESS : e - PJ_ERRNO_START_SYS)
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#else
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# define PJ_STATUS_TO_OS(e) (e == 0 ? PJ_SUCCESS : PJ_ERRNO_START_SYS - e)
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#endif
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/**
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* @defgroup pj_errnum PJLIB's Own Error Codes
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* @ingroup pj_errno
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* @{
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*/
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/**
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* Use this macro to generate error message text for your error code,
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* so that they look uniformly as the rest of the libraries.
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*
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* @param code The error code
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* @param msg The error test.
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*/
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#ifndef PJ_BUILD_ERR
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# define PJ_BUILD_ERR(code,msg) { code, msg " (" #code ")" }
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#endif
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/**
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* @hideinitializer
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* Unknown error has been reported.
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*/
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#define PJ_EUNKNOWN (PJ_ERRNO_START_STATUS + 1) /* 70001 */
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/**
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* @hideinitializer
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* The operation is pending and will be completed later.
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*/
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#define PJ_EPENDING (PJ_ERRNO_START_STATUS + 2) /* 70002 */
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/**
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* @hideinitializer
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* Too many connecting sockets.
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*/
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#define PJ_ETOOMANYCONN (PJ_ERRNO_START_STATUS + 3) /* 70003 */
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/**
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* @hideinitializer
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* Invalid argument.
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*/
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#define PJ_EINVAL (PJ_ERRNO_START_STATUS + 4) /* 70004 */
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/**
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* @hideinitializer
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* Name too long (eg. hostname too long).
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*/
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#define PJ_ENAMETOOLONG (PJ_ERRNO_START_STATUS + 5) /* 70005 */
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/**
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* @hideinitializer
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* Not found.
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*/
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#define PJ_ENOTFOUND (PJ_ERRNO_START_STATUS + 6) /* 70006 */
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/**
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* @hideinitializer
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* Not enough memory.
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*/
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#define PJ_ENOMEM (PJ_ERRNO_START_STATUS + 7) /* 70007 */
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/**
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* @hideinitializer
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* Bug detected!
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*/
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#define PJ_EBUG (PJ_ERRNO_START_STATUS + 8) /* 70008 */
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/**
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* @hideinitializer
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* Operation timed out.
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*/
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#define PJ_ETIMEDOUT (PJ_ERRNO_START_STATUS + 9) /* 70009 */
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/**
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* @hideinitializer
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* Too many objects.
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*/
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#define PJ_ETOOMANY (PJ_ERRNO_START_STATUS + 10)/* 70010 */
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/**
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* @hideinitializer
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* Object is busy.
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*/
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#define PJ_EBUSY (PJ_ERRNO_START_STATUS + 11)/* 70011 */
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/**
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* @hideinitializer
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* The specified option is not supported.
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*/
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#define PJ_ENOTSUP (PJ_ERRNO_START_STATUS + 12)/* 70012 */
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/**
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* @hideinitializer
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* Invalid operation.
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*/
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#define PJ_EINVALIDOP (PJ_ERRNO_START_STATUS + 13)/* 70013 */
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/**
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* @hideinitializer
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* Operation is cancelled.
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*/
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#define PJ_ECANCELLED (PJ_ERRNO_START_STATUS + 14)/* 70014 */
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/**
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* @hideinitializer
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* Object already exists.
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*/
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#define PJ_EEXISTS (PJ_ERRNO_START_STATUS + 15)/* 70015 */
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/**
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* @hideinitializer
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* End of file.
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*/
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#define PJ_EEOF (PJ_ERRNO_START_STATUS + 16)/* 70016 */
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/**
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* @hideinitializer
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* Size is too big.
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*/
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#define PJ_ETOOBIG (PJ_ERRNO_START_STATUS + 17)/* 70017 */
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/**
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* @hideinitializer
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* Error in gethostbyname(). This is a generic error returned when
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* gethostbyname() has returned an error.
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*/
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#define PJ_ERESOLVE (PJ_ERRNO_START_STATUS + 18)/* 70018 */
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/**
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* @hideinitializer
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* Size is too small.
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*/
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#define PJ_ETOOSMALL (PJ_ERRNO_START_STATUS + 19)/* 70019 */
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/**
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* @hideinitializer
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* Ignored
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*/
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#define PJ_EIGNORED (PJ_ERRNO_START_STATUS + 20)/* 70020 */
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/**
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* @hideinitializer
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* IPv6 is not supported
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*/
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#define PJ_EIPV6NOTSUP (PJ_ERRNO_START_STATUS + 21)/* 70021 */
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/**
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* @hideinitializer
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* Unsupported address family
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*/
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#define PJ_EAFNOTSUP (PJ_ERRNO_START_STATUS + 22)/* 70022 */
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/**
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* @hideinitializer
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* Object no longer exists
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*/
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#define PJ_EGONE (PJ_ERRNO_START_STATUS + 23)/* 70023 */
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/**
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* @hideinitializer
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* Socket is stopped
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*/
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#define PJ_ESOCKETSTOP (PJ_ERRNO_START_STATUS + 24)/* 70024 */
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/** @} */ /* pj_errnum */
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/** @} */ /* pj_errno */
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/**
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* PJ_ERRNO_START is where PJLIB specific error values start.
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*/
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#define PJ_ERRNO_START 20000
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/**
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* PJ_ERRNO_SPACE_SIZE is the maximum number of errors in one of
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* the error/status range below.
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*/
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#define PJ_ERRNO_SPACE_SIZE 50000
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/**
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* PJ_ERRNO_START_STATUS is where PJLIB specific status codes start.
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* Effectively the error in this class would be 70000 - 119000.
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*/
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#define PJ_ERRNO_START_STATUS (PJ_ERRNO_START + PJ_ERRNO_SPACE_SIZE)
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/**
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* PJ_ERRNO_START_SYS converts platform specific error codes into
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* pj_status_t values.
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* Effectively the error in this class would be 120000 - 169000.
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*/
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#define PJ_ERRNO_START_SYS (PJ_ERRNO_START_STATUS + PJ_ERRNO_SPACE_SIZE)
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/**
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* PJ_ERRNO_START_USER are reserved for applications that use error
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* codes along with PJLIB codes.
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* Effectively the error in this class would be 170000 - 219000.
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*/
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#define PJ_ERRNO_START_USER (PJ_ERRNO_START_SYS + PJ_ERRNO_SPACE_SIZE)
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/*
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* Below are list of error spaces that have been taken so far:
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* - PJSIP_ERRNO_START (PJ_ERRNO_START_USER)
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* - PJMEDIA_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE)
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* - PJSIP_SIMPLE_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*2)
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* - PJLIB_UTIL_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*3)
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* - PJNATH_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*4)
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* - PJMEDIA_AUDIODEV_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*5)
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* - PJ_SSL_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*6)
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* - PJMEDIA_VIDEODEV_ERRNO_START (PJ_ERRNO_START_USER + PJ_ERRNO_SPACE_SIZE*7)
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*/
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/* Internal */
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void pj_errno_clear_handlers(void);
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/****** Internal for PJ_PERROR *******/
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/**
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* @def pj_perror_wrapper_1(arg)
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* Internal function to write log with verbosity 1. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 1.
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* @param arg Log expression.
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*/
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#if PJ_LOG_MAX_LEVEL >= 1
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#define pj_perror_wrapper_1(arg) pj_perror_1 arg
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/** Internal function. */
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PJ_DECL(void) pj_perror_1(const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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#else
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#define pj_perror_wrapper_1(arg)
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#endif
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/**
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* @def pj_perror_wrapper_2(arg)
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* Internal function to write log with verbosity 2. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 2.
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* @param arg Log expression.
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*/
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#if PJ_LOG_MAX_LEVEL >= 2
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#define pj_perror_wrapper_2(arg) pj_perror_2 arg
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/** Internal function. */
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PJ_DECL(void) pj_perror_2(const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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#else
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#define pj_perror_wrapper_2(arg)
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#endif
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/**
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* @def pj_perror_wrapper_3(arg)
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* Internal function to write log with verbosity 3. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 3.
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* @param arg Log expression.
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*/
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#if PJ_LOG_MAX_LEVEL >= 3
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#define pj_perror_wrapper_3(arg) pj_perror_3 arg
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/** Internal function. */
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PJ_DECL(void) pj_perror_3(const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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#else
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#define pj_perror_wrapper_3(arg)
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#endif
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/**
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* @def pj_perror_wrapper_4(arg)
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* Internal function to write log with verbosity 4. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 4.
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* @param arg Log expression.
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*/
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#if PJ_LOG_MAX_LEVEL >= 4
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#define pj_perror_wrapper_4(arg) pj_perror_4 arg
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/** Internal function. */
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PJ_DECL(void) pj_perror_4(const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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#else
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#define pj_perror_wrapper_4(arg)
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#endif
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/**
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* @def pj_perror_wrapper_5(arg)
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* Internal function to write log with verbosity 5. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 5.
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* @param arg Log expression.
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*/
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|
#if PJ_LOG_MAX_LEVEL >= 5
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#define pj_perror_wrapper_5(arg) pj_perror_5 arg
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/** Internal function. */
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PJ_DECL(void) pj_perror_5(const char *sender, pj_status_t status,
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const char *title_fmt, ...);
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#else
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#define pj_perror_wrapper_5(arg)
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#endif
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/**
|
|
* @def pj_perror_wrapper_6(arg)
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* Internal function to write log with verbosity 6. Will evaluate to
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* empty expression if PJ_LOG_MAX_LEVEL is below 6.
|
|
* @param arg Log expression.
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|
*/
|
|
#if PJ_LOG_MAX_LEVEL >= 6
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|
#define pj_perror_wrapper_6(arg) pj_perror_6 arg
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|
/** Internal function. */
|
|
PJ_DECL(void) pj_perror_6(const char *sender, pj_status_t status,
|
|
const char *title_fmt, ...);
|
|
#else
|
|
#define pj_perror_wrapper_6(arg)
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|
#endif
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PJ_END_DECL
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#endif /* __PJ_ERRNO_H__ */
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