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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 does not have expected length: %ld > %ld\n",\
len,\
array->length);\
}
void* array_at(const array_t* array, size_t idx) {
CRASH_IF_OOB(array, idx + 1);
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);
return (array_t) {
.length = length,
.__data = (char*)array->__data + start * array->elemsz
};
}
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);
return (array_t) {
.length = length,
.elemsz = elemsz,
.__data = data_ptr,
};
}
void array_heap_destroy(array_t array) {
free(array.__data);
}
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