libc/private/debug_format.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _DEBUG_FORMAT_H
#define _DEBUG_FORMAT_H

#include <sys/cdefs.h>
#include <stdarg.h>
#include <stddef.h>

__BEGIN_DECLS

// Formatting routines for the C library's internal debugging.
// Unlike the usual alternatives, these don't allocate.

__LIBC_HIDDEN__ int __libc_format_buffer(char* buffer, size_t buffer_size, const char* format, ...)
    __attribute__((__format__(printf, 3, 4)));

__LIBC_HIDDEN__ int __libc_format_fd(int fd, const char* format, ...)
    __attribute__((__format__(printf, 2, 3)));

__LIBC_HIDDEN__ int __libc_format_log(int priority, const char* tag, const char* format, ...)
    __attribute__((__format__(printf, 3, 4)));

__LIBC_HIDDEN__ int __libc_format_log_va_list(int priority, const char* tag, const char* format,
                                              va_list ap);

__END_DECLS

#endif /* _DEBUG_FORMAT_H */