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/* misc_tools.h
*
* Miscellaneous functions and data structures for doing random things.
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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 3 of the License, or
* (at your option) any later version.
*
* Tox 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.
*
* You should have received a copy of the GNU General Public License
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef MISC_TOOLS_H
#define MISC_TOOLS_H
#include <stdlib.h>
#include <stdint.h>
unsigned char *hex_string_to_bin(char hex_string[]);
/*********************Debugging Macros********************
* wiki.tox.im/index.php/Internal_functions_and_data_structures#Debugging
*********************************************************/
#ifdef DEBUG
#include <assert.h>
#include <stdio.h>
#include <string.h>
#define DEBUG_PRINT(str, ...) do { \
char msg[1000]; \
sprintf(msg, "%s(): line %d (file %s): %s%%c\n", __FUNCTION__, __LINE__, __FILE__, str); \
fprintf(stderr, msg, __VA_ARGS__); \
} while (0)
#define WARNING(...) do { \
fprintf(stderr, "warning in "); \
DEBUG_PRINT(__VA_ARGS__, ' '); \
} while (0)
#define INFO(...) do { \
DEBUG_PRINT(__VA_ARGS__, ' '); \
} while (0)
#undef ERROR
#define ERROR(exit_status, ...) do { \
fprintf(stderr, "error in "); \
DEBUG_PRINT(__VA_ARGS__, ' '); \
exit(exit_status); \
} while (0)
#else
#define WARNING(...)
#define INFO(...)
#undef ERROR
#define ERROR(...)
#endif // DEBUG
/************************Linked List***********************
* http://wiki.tox.im/index.php/Internal_functions_and_data_structures#Linked_List
**********************************************************/
#define MEMBER_OFFSET(var_name_in_parent, parent_type) \
(&(((parent_type*)0)->var_name_in_parent))
#define GET_PARENT(var, var_name_in_parent, parent_type) \
((parent_type*)((uint64_t)(&(var)) - (uint64_t)(MEMBER_OFFSET(var_name_in_parent, parent_type))))
#define TOX_LIST_FOR_EACH(lst, tmp_name) \
for (tox_list_t* tmp_name = lst.next; tmp_name != &lst; tmp_name = tmp_name->next)
#define TOX_LIST_GET_VALUE(tmp_name, name_in_parent, parent_type) GET_PARENT(tmp_name, name_in_parent, parent_type)
typedef struct tox_list {
struct tox_list *prev, *next;
} tox_list_t;
/* Returns a new tox_list_t. */
static inline void tox_list_new(tox_list_t *lst)
{
lst->prev = lst->next = lst;
}
/* Inserts a new tox_lst after lst and returns it. */
static inline void tox_list_add(tox_list_t *lst, tox_list_t *new_lst)
{
tox_list_new(new_lst);
new_lst->next = lst->next;
new_lst->next->prev = new_lst;
lst->next = new_lst;
new_lst->prev = lst;
}
static inline void tox_list_remove(tox_list_t *lst)
{
lst->prev->next = lst->next;
lst->next->prev = lst->prev;
}
/****************************Array***************************
* Array to store pointers which tracks it's own size.
* TODO: Figure out if it shold store values instead of
* pointers?
* TODO: Add wiki info usage.
************************************************************/
struct tox_array {
void **data;
uint32_t size, length;
};
static inline void tox_array_init(struct tox_array *arr)
{
arr->size = 1;
arr->length = 0;
arr->data = malloc(sizeof(void *));
}
static inline void tox_array_delete(struct tox_array *arr)
{
free(arr->data);
arr->size = arr->length = 0;
}
/* shrinks arr so it will not have unused space. If you want to have
* addtional space, extra species the amount of extra space.
*/
static inline void tox_array_shrink_to_fit(struct tox_array *arr, int32_t extra)
{
arr->size = arr->length + extra;
arr->data = realloc(arr->data, arr->size * sizeof(void *));
}
static inline void _tox_array_push(struct tox_array *arr, void *new)
{
if (arr->length + 1 >= arr->size)
tox_array_shrink_to_fit(arr, arr->size);
arr->data[arr->length++] = new;
}
#define tox_array_push(arr, new) _tox_array_push(arr, (void*)new)
static inline void *tox_array_pop(struct tox_array *arr)
{
if (arr->length - 1 < arr->size / 4)
tox_array_shrink_to_fit(arr, arr->length * 2);
return arr->data[arr->length--];
}
#endif // MISC_TOOLS_H
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