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/* Copyright (C) 2023 Aryadev Chavali
* You may distribute and modify this code under the terms of the
* GPLv2 license. You should have received a copy of the GPLv2
* license with this file. If not, please write to:
* aryadev@aryadevchavali.com.
* Created: 2023-10-15
* Author: Aryadev Chavali
* Description: Dynamically sized byte array
*/
#include <assert.h>
#include <malloc.h>
#include <string.h>
#include "./darr.h"
void darr_init(darr_t *darr, size_t size)
{
if (size == 0)
size = DARR_DEFAULT_SIZE;
*darr = (darr_t){
.data = calloc(size, 1),
.used = 0,
.available = size,
};
}
void darr_ensure_capacity(darr_t *darr, size_t requested)
{
if (darr->used + requested >= darr->available)
{
darr->available =
MAX(darr->used + requested, darr->available * DARR_REALLOC_MULT);
darr->data = realloc(darr->data, darr->available);
}
}
void darr_append_byte(darr_t *darr, byte byte)
{
darr_ensure_capacity(darr, 1);
darr->data[darr->used++] = byte;
}
void darr_append_bytes(darr_t *darr, byte *bytes, size_t n)
{
darr_ensure_capacity(darr, n);
memcpy(darr->data + darr->used, bytes, n);
darr->used += n;
}
byte darr_at(darr_t *darr, size_t index)
{
if (index >= darr->used)
// TODO: Error (index is out of bounds)
return 0;
return darr->data[index];
}
void darr_write_file(darr_t *bytes, FILE *fp)
{
size_t size = fwrite(bytes->data, bytes->used, 1, fp);
assert(size == 1);
}
darr_t darr_read_file(FILE *fp)
{
darr_t darr = {0};
fseek(fp, 0, SEEK_END);
long size = ftell(fp);
darr_init(&darr, size);
fseek(fp, 0, SEEK_SET);
fread(darr.data, size, 1, fp);
return darr;
}
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