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#include "array.h"
#include "crash.h"
#include <string.h>
#include <stdlib.h>
#define CRASH_IF_OOB(array, len) {\
if (len > array.length)\
crash("Array access out of bounds: %ld > %ld\n", len, array.length);\
}
void* array_at(const array_t array, size_t idx) {
CRASH_IF_OOB(array, idx);
return (char*)array.__data + idx*array.elemsz;
}
array_t array_slice(const array_t array, size_t start, size_t length) {
CRASH_IF_OOB(array, start + length);
array_t slice = {
.length = length,
.__data = (char*)array.__data + start * array.elemsz
};
return slice;
}
array_t array_init(void* data, size_t length, size_t elemsz) {
array_t array = {.length = length, .elemsz = elemsz, .__data = data};
return array;
}
array_t array_heap_alloc(size_t length, size_t elemsz) {
void* data_ptr = calloc(length, elemsz);
if (data_ptr == NULL)
crash(
"Out of memory allocating %ld elements of size %ld\n",
length,
elemsz);
array_t container = {
.length = length,
.elemsz = elemsz,
.__data = data_ptr,
};
return container;
}
void array_heap_destroy(array_t array) {
free(array.__data);
}
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