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/**
* @file library.c
*
* @brief Helper functions and definitions.
*
*/
/*
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <stdarg.h>
#include <pthread.h>
#include "library.h"
#include <printf_hook.h>
ENUM(status_names, SUCCESS, DESTROY_ME,
"SUCCESS",
"FAILED",
"OUT_OF_RES",
"ALREADY_DONE",
"NOT_SUPPORTED",
"INVALID_ARG",
"NOT_FOUND",
"PARSE_ERROR",
"VERIFY_ERROR",
"INVALID_STATE",
"DESTROY_ME",
"NEED_MORE",
);
/**
* Described in header.
*/
void *clalloc(void * pointer, size_t size)
{
void *data;
data = malloc(size);
memcpy(data, pointer,size);
return (data);
}
/**
* Described in header.
*/
void memxor(u_int8_t dest[], u_int8_t src[], size_t n)
{
size_t i;
for (i = 0; i < n; i++)
{
dest[i] ^= src[i];
}
}
/**
* We use a single mutex for all refcount variables. This
* is not optimal for performance, but the critical section
* is not that long...
* TODO: Consider to include a mutex in each refcount_t variable.
*/
static pthread_mutex_t ref_mutex = PTHREAD_MUTEX_INITIALIZER;
/**
* Described in header.
*
* TODO: May be implemented with atomic CPU instructions
* instead of a mutex.
*/
void ref_get(refcount_t *ref)
{
pthread_mutex_lock(&ref_mutex);
(*ref)++;
pthread_mutex_unlock(&ref_mutex);
}
/**
* Described in header.
*
* TODO: May be implemented with atomic CPU instructions
* instead of a mutex.
*/
bool ref_put(refcount_t *ref)
{
bool more_refs;
pthread_mutex_lock(&ref_mutex);
more_refs = --(*ref);
pthread_mutex_unlock(&ref_mutex);
return !more_refs;
}
/**
* output handler in printf() for time_t
*/
static int print_time(FILE *stream, const struct printf_info *info,
const void *const *args)
{
static const char* months[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
time_t *time = *((time_t**)(args[0]));
bool utc = TRUE;
struct tm t;
if (info->alt)
{
utc = *((bool*)(args[1]));
}
if (time == UNDEFINED_TIME)
{
return fprintf(stream, "--- -- --:--:--%s----",
info->alt ? " UTC " : " ");
}
if (utc)
{
gmtime_r(time, &t);
}
else
{
localtime_r(time, &t);
}
return fprintf(stream, "%s %02d %02d:%02d:%02d%s%04d",
months[t.tm_mon], t.tm_mday, t.tm_hour, t.tm_min,
t.tm_sec, utc ? " UTC " : " ", t.tm_year + 1900);
}
/**
* output handler in printf() for time deltas
*/
static int print_time_delta(FILE *stream, const struct printf_info *info,
const void *const *args)
{
char* unit = "second";
time_t *arg1, *arg2;
time_t delta;
arg1 = *((time_t**)(args[0]));
if (info->alt)
{
arg2 = *((time_t**)(args[1]));
delta = abs(*arg1 - *arg2);
}
else
{
delta = *arg1;
}
if (delta > 2 * 60 * 60 * 24)
{
delta /= 60 * 60 * 24;
unit = "day";
}
else if (delta > 2 * 60 * 60)
{
delta /= 60 * 60;
unit = "hour";
}
else if (delta > 2 * 60)
{
delta /= 60;
unit = "minute";
}
return fprintf(stream, "%d %s%s", delta, unit, (delta == 1)? "":"s");
}
/**
* register printf() handlers for time_t
*/
static void __attribute__ ((constructor))print_register()
{
register_printf_function(PRINTF_TIME, print_time, arginfo_ptr_alt_ptr_int);
register_printf_function(PRINTF_TIME_DELTA, print_time_delta, arginfo_ptr_alt_ptr_ptr);
}
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