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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "wasm-vector.h"
#include "wasm-allocator.h"
#define INITIAL_VECTOR_CAPACITY 8
void wasm_ensure_capacity(WasmAllocator* allocator,
void** data,
size_t* capacity,
size_t desired_size,
size_t elt_byte_size) {
if (desired_size > *capacity) {
size_t new_capacity = *capacity ? *capacity * 2 : INITIAL_VECTOR_CAPACITY;
while (new_capacity < desired_size)
new_capacity *= 2;
size_t new_byte_size = new_capacity * elt_byte_size;
*data = wasm_realloc(allocator, *data, new_byte_size, WASM_DEFAULT_ALIGN);
*capacity = new_capacity;
}
}
void wasm_resize_vector(struct WasmAllocator* allocator,
void** data,
size_t* size,
size_t* capacity,
size_t desired_size,
size_t elt_byte_size) {
size_t old_size = *size;
wasm_ensure_capacity(allocator, data, capacity, desired_size, elt_byte_size);
if (desired_size > old_size) {
memset((void*)((size_t)*data + old_size * elt_byte_size), 0,
(desired_size - old_size) * elt_byte_size);
}
*size = desired_size;
}
void* wasm_append_element(WasmAllocator* allocator,
void** data,
size_t* size,
size_t* capacity,
size_t elt_byte_size) {
wasm_ensure_capacity(allocator, data, capacity, *size + 1, elt_byte_size);
void* p = (void*)((size_t)*data + (*size)++ * elt_byte_size);
memset(p, 0, elt_byte_size);
return p;
}
void wasm_extend_elements(WasmAllocator* allocator,
void** dst,
size_t* dst_size,
size_t* dst_capacity,
const void** src,
size_t src_size,
size_t elt_byte_size) {
wasm_ensure_capacity(allocator, dst, dst_capacity, *dst_size + src_size,
elt_byte_size);
memcpy((void*)((size_t)*dst + (*dst_size * elt_byte_size)), *src,
src_size * elt_byte_size);
*dst_size += src_size;
}
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