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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 <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "scope.h"
scope_t *
scope_new(arena_t *arena)
{
assert(arena);
scope_t *scope = (scope_t *)arena_alloc(arena, sizeof(scope_t));
if (scope == NULL) {
fprintf(stderr, "[FATAL] Out of memory: scope_new: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
scope->arena = arena;
scope->symbols = map_new(arena);
return scope;
}
symbol_t *
symbol_new(arena_t *arena, string_view_t id)
{
assert(arena);
symbol_t *symbol = (symbol_t *)arena_alloc(arena, sizeof(symbol_t));
if (symbol == NULL) {
fprintf(stderr, "[FATAL] Out of memory: symbol_new: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
symbol->id = id;
return symbol;
}
symbol_t *
scope_lookup(scope_t *scope, string_view_t id)
{
assert(scope);
while (scope != NULL) {
char cstr_id[id.size + 1];
cstr_id[id.size] = 0;
memcpy(cstr_id, id.chars, id.size);
symbol_t *symbol = (symbol_t *)map_get(scope->symbols, cstr_id);
if (symbol != NULL) {
return symbol;
}
scope = scope->parent;
}
return NULL;
}
void
scope_insert(scope_t *scope, symbol_t *symbol)
{
assert(scope);
assert(symbol);
char id[symbol->id.size + 1];
id[symbol->id.size] = 0;
memcpy(id, symbol->id.chars, symbol->id.size);
map_put(scope->symbols, id, symbol);
}
scope_t *
scope_push(scope_t *scope)
{
assert(scope);
scope_t *child = scope_new(scope->arena);
child->parent = scope;
return child;
}
scope_t *
scope_pop(scope_t *scope)
{
assert(scope);
assert(scope->parent);
return scope->parent;
}
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