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/*
* Support for printing out to stdout/stderr/elsewhere -- functions to use
* instead of printf, etc.
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* 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 MPEG TS, PS and ES tools.
*
* The Initial Developer of the Original Code is Amino Communications Ltd.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Amino Communications Ltd, Swavesey, Cambridge UK
*
* ***** END LICENSE BLOCK *****
*/
#ifndef _printing_fns
#define _printing_fns
#include "printing_defns.h"
// ============================================================
// Functions for printing
// ============================================================
/*
* Prints the given string, as a normal message.
*/
extern void print_msg(const char *text);
/*
* Prints the given string, as an error message.
*/
extern void print_err(const char *text);
/*
* Prints the given format text, as a normal message.
*/
extern void fprint_msg(const char *format, ...);
/*
* Prints the given formatted text, as an error message.
*/
extern void fprint_err(const char *format, ...);
/*
* Prints the given formatted text, as a normal or error message.
* If `is_msg`, then as a normal message, else as an error
*/
extern void fprint_msg_or_err(int is_msg, const char *format, ...);
/*
* Flush the message output
*/
extern void flush_msg(void);
// ============================================================
// Choosing what the printing functions do
// ============================================================
/*
* Calling this causes errors to go to stderr, and all other output
* to go to stdout. This is the "traditional" mechanism used by
* Unices.
*/
extern void redirect_output_stderr(void);
/*
* Calling this causes all output to go to stdout. This is simpler,
* and is likely to be more use to most users.
*
* This is the default state.
*/
extern void redirect_output_stdout(void);
/*
* This allows the user to specify a set of functions to use for
* formatted printing and non-formatted printing of errors and
* other messages.
*
* It is up to the caller to ensure that all of the functions
* make sense. All four functions must be specified.
*
* * `new_print_message_fn` takes a string and prints it out to the "normal"
* output stream.
* * `new_print_error_fn` takes a string and prints it out to the error output
* stream.
* * `new_fprint_message_fn` takes a printf-style format string and the
* appropriate arguments, and writes the result out to the "normal" output.
* * `new_fprint_error_fn` takes a printf-style format string and the
* appropriate arguments, and writes the result out to the "error" output.
* * `new_flush_msg_fn` flushes the "normal" message output.
*
* Returns 0 if all goes well, 1 if something goes wrong.
*/
extern int redirect_output( void (*new_print_message_fn) (const char *message),
void (*new_print_error_fn) (const char *message),
void (*new_fprint_message_fn) (const char *format, va_list arg_ptr),
void (*new_fprint_error_fn) (const char *format, va_list arg_ptr),
void (*new_flush_msg_fn) (void)
);
// Just for the moment
extern void test_C_printing(void);
#endif // _printing_fns
// Local Variables:
// tab-width: 8
// indent-tabs-mode: nil
// c-basic-offset: 2
// End:
// vim: set tabstop=8 shiftwidth=2 expandtab:
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