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#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#include "sblist.h"
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#define MY_PAGE_SIZE 4096
sblist* sblist_new(size_t itemsize, size_t blockitems) {
sblist* ret = (sblist*) malloc(sizeof(sblist));
sblist_init(ret, itemsize, blockitems);
return ret;
}
static void sblist_clear(sblist* l) {
l->items = NULL;
l->capa = 0;
l->count = 0;
}
void sblist_init(sblist* l, size_t itemsize, size_t blockitems) {
if(l) {
l->blockitems = blockitems ? blockitems : MY_PAGE_SIZE / itemsize;
l->itemsize = itemsize;
sblist_clear(l);
}
}
void sblist_free_items(sblist* l) {
if(l) {
if(l->items) free(l->items);
sblist_clear(l);
}
}
void sblist_free(sblist* l) {
if(l) {
sblist_free_items(l);
free(l);
}
}
char* sblist_item_from_index(sblist* l, size_t idx) {
return l->items + (idx * l->itemsize);
}
void* sblist_get(sblist* l, size_t item) {
if(item < l->count) return (void*) sblist_item_from_index(l, item);
return NULL;
}
int sblist_set(sblist* l, void* item, size_t pos) {
if(pos >= l->count) return 0;
memcpy(sblist_item_from_index(l, pos), item, l->itemsize);
return 1;
}
int sblist_grow_if_needed(sblist* l) {
char* temp;
if(l->count == l->capa) {
temp = realloc(l->items, (l->capa + l->blockitems) * l->itemsize);
if(!temp) return 0;
l->capa += l->blockitems;
l->items = temp;
}
return 1;
}
int sblist_add(sblist* l, void* item) {
if(!sblist_grow_if_needed(l)) return 0;
l->count++;
return sblist_set(l, item, l->count - 1);
}
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