factor/vm/byte_arrays.cpp

68 lines
1.9 KiB
C++
Raw Normal View History

2009-05-02 05:04:19 -04:00
#include "master.hpp"
namespace factor {
2009-05-04 02:46:13 -04:00
// Allocates memory
byte_array* factor_vm::allot_byte_array(cell size) {
byte_array* array = allot_uninitialized_array<byte_array>(size);
memset(array + 1, 0, size);
return array;
2009-05-02 05:04:19 -04:00
}
// Allocates memory
void factor_vm::primitive_byte_array() {
cell size = unbox_array_size();
ctx->push(tag<byte_array>(allot_byte_array(size)));
2009-05-02 05:04:19 -04:00
}
// Allocates memory
void factor_vm::primitive_uninitialized_byte_array() {
cell size = unbox_array_size();
ctx->push(tag<byte_array>(allot_uninitialized_array<byte_array>(size)));
2009-05-02 05:04:19 -04:00
}
// Allocates memory
void factor_vm::primitive_resize_byte_array() {
data_root<byte_array> array(ctx->pop(), this);
check_tagged(array);
cell capacity = unbox_array_size();
ctx->push(tag<byte_array>(reallot_array(array.untagged(), capacity)));
2009-05-02 05:04:19 -04:00
}
// Allocates memory
void growable_byte_array::grow_bytes(cell len) {
count += len;
if (count >= array_capacity(elements.untagged()))
elements = elements.parent->reallot_array(elements.untagged(), count * 2);
}
// Allocates memory
void growable_byte_array::append_bytes(void* elts, cell len) {
cell old_count = count;
grow_bytes(len);
memcpy(&elements->data<uint8_t>()[old_count], elts, len);
2009-05-02 10:19:09 -04:00
}
// Allocates memory
void growable_byte_array::append_byte_array(cell byte_array_) {
data_root<byte_array> byte_array(byte_array_, elements.parent);
2009-05-02 10:19:09 -04:00
cell len = array_capacity(byte_array.untagged());
cell new_size = count + len;
factor_vm* parent = elements.parent;
if (new_size >= array_capacity(elements.untagged()))
elements = parent->reallot_array(elements.untagged(), new_size * 2);
2009-05-02 10:19:09 -04:00
memcpy(&elements->data<uint8_t>()[count], byte_array->data<uint8_t>(), len);
2009-05-02 10:19:09 -04:00
count += len;
2009-05-02 10:19:09 -04:00
}
// Allocates memory
void growable_byte_array::trim() {
factor_vm* parent = elements.parent;
elements = parent->reallot_array(elements.untagged(), count);
2009-05-02 05:04:19 -04:00
}
2009-05-04 02:46:13 -04:00
}