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Merge pull request #410 from KostyaKow/array

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Array
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irungentoo 2013-08-09 09:07:03 -07:00
commit b9991e1d3c
1 changed files with 69 additions and 80 deletions
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149
testing/misc_tools.h
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@ -24,17 +24,14 @@
#ifndef MISC_TOOLS_H
#define MISC_TOOLS_H
unsigned char * hex_string_to_bin(char hex_string[]);
#include <stdlib.h>
#include <stdint.h>
/* WARNING(msg) takes a printf()-styled string and prints it
* with some additional details.
* ERROR(exit_status, msg) does the same thing as WARNING(), but
* also exits the program with the given exit status.
* Examples:
* WARNING("<insert warning message here>");
* int exit_status = 2;
* ERROR(exit_status, "exiting with status %i", exit_status);
*/
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>
@ -51,6 +48,10 @@ unsigned char * hex_string_to_bin(char hex_string[]);
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 "); \
@ -59,81 +60,20 @@ unsigned char * hex_string_to_bin(char hex_string[]);
} while (0)
#else
#define WARNING(...)
#define INFO(...)
#undef ERROR
#define ERROR(...)
#endif // DEBUG
/************************Linked List***********************
* This is a simple linked list implementation, very similar
* to Linux kernel's /include/linux/list.h (which we can't
* use because Tox is GPLv3 and Linux is GPLv2.)
*
* TODO: Make the lists easier to use with some sweat pre-
* processor syntactic sugar.
* http://wiki.tox.im/index.php/Internal_functions_and_data_structures#Linked_List
**********************************************************/
/* Example usage
This sample program makes a new struct which contains a
character and a tox_list_t. It then prompts a user for
input until he enters q or e. It then adds each character
to the list, and uses a special for loop to print them.
It then removes all the 'z' characters, and prints the list
again.
//Notice that the data to be put in the list *contains* tox_list_t;
//usually, this is the other way around!
typedef struct tox_string {
char c;
tox_list_t tox_lst; //Notice that tox_lst is *NOT* a pointer.
} tox_string_t;
int main()
{
tox_list_t head;
tox_list_new(&head); //initialize head
//input a new character, until user enters q or e
char c = '\0';
while (c != 'q' && c != 'e') {
scanf("%c", &c);
tox_string_t* tmp = malloc(sizeof(tox_string_t));
tmp->c = c;
tox_list_add(&head, &tmp->tox_lst); //add it to the list
}
TOX_LIST_FOR_EACH() takes a struct tox_list and a name for a temporary pointer to use in the loop.
TOX_LIST_GET_VALUE() uses magic to return an instance of a structure that contains tox_list_t.
You have to give it a temporary tox_string_t, name of tox_list_t member inside our structure (tox_lst),
and the type of structure to return.
TOX_LIST_FOR_EACH(head, tmp)
printf("%c", TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c);
TOX_LIST_FOR_EACH(head, tmp) {
if (TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c == 'z') {
//If you delete tmp, you have to quit the loop, or it will go on infinitly.
//This will be fixed later on.
tox_list_remove(tmp);
break;
}
}
printf("\n");
TOX_LIST_FOR_EACH(head, tmp)
printf("%c", TOX_LIST_GET_VALUE(*tmp, tox_lst, tox_string_t).c);
return 0;
}
*/
#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)))))
((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)
@ -145,12 +85,14 @@ typedef struct tox_list {
} tox_list_t;
/* Returns a new tox_list_t. */
static inline void tox_list_new(tox_list_t* lst) {
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) {
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;
@ -160,12 +102,59 @@ static inline void tox_list_add(tox_list_t* lst, tox_list_t* new_lst) {
new_lst->prev = lst;
}
static inline void tox_list_remove(tox_list_t* lst) {
#ifdef DEBUG /* TODO: check how debugging is done in Tox. */
assert(lst->next != lst && lst->prev != lst);
#endif
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