MrGeorgen/advanced_C_standard_library
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added remove and free functions for arrays

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MrGeorgen
2020-07-21 21:27:35 +02:00
parent cf9856d061
commit 95511ebe32
4 changed files with 22 additions and 0 deletions
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3
include/acl/array.h
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@ -1,5 +1,8 @@
#ifndef array_h
#define array_h
#include <stddef.h>
void acl_arraylist_free(void *arraylist);
void* acl_arraylist_remove(void *arraylist_void, size_t index);
void* acl_arraylist_create(size_t array_size, size_t sizeof_one_element);
void* acl_arraylist_append(void *arraylist_void, void *element_void);
#endif

19
src/array.c
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@ -30,8 +30,27 @@ void* acl_arraylist_append(void *arraylist_void, void *element) {
if(arraylist->len == arraylist->cap) {
arraylist->cap = arraylist->len + 10;
arraylist = realloc(arraylist, arraylist->cap * arraylist->sizeof_one_element + sizeof *arraylist);
if(!arraylist) return NULL;
}
memcpy((char*)(arraylist + 1) + arraylist->sizeof_one_element * arraylist->len, element, arraylist->sizeof_one_element);
++arraylist->len;
return arraylist+1;
}
void acl_arraylist_free(void *arraylist) {
free((union arraylist_meta*)arraylist-1);
}
void* acl_arraylist_remove(void *arraylist_void, size_t index) {
union arraylist_meta *arraylist = (union arraylist_meta*)arraylist_void - 1;
char *arraylist_char = arraylist_void;
if(index != arraylist->len - 1) {
memcpy(arraylist_char + arraylist->sizeof_one_element * index, arraylist_char + arraylist->sizeof_one_element * (arraylist->len - 1), arraylist->sizeof_one_element);
}
--arraylist->len;
if(arraylist->len < arraylist->cap - 10) {
arraylist->cap = arraylist->len;
arraylist = realloc(arraylist, arraylist->cap * arraylist->sizeof_one_element + sizeof *arraylist);
}
return arraylist;
}