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| | /*
* Copyright (C) 2024 olang maintainers
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "arena.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
arena_t
arena_new(size_t size)
{
arena_t arena;
arena.offset = 0;
arena.region = malloc(sizeof(uint8_t) * size);
arena.size = size;
return arena;
}
void *
arena_alloc(arena_t *arena, size_t size)
{
if ((arena->offset + size) > arena->size) {
return NULL;
}
void *pointer = arena->region + arena->offset;
arena->offset += size;
return pointer;
}
void
arena_release(arena_t *arena)
{
arena->offset = 0;
}
void
arena_free(arena_t *arena)
{
arena->size = 0;
free(arena->region);
}
char *
arena_strdup(arena_t *arena, const char *s)
{
size_t slen = strlen(s);
char *result = arena_alloc(arena, slen + 1);
if (result == NULL) {
return NULL;
}
memcpy(result, s, slen + 1);
return result;
}
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