libabacus/src/tree.c

71 lines
2.2 KiB
C

#include "tree.h"
#include <stdlib.h>
int libab_tree_has_vector(libab_tree_variant variant) {
return variant == TREE_BASE || variant == TREE_OP ||
variant == TREE_PREFIX_OP || variant == TREE_POSTFIX_OP ||
variant == TREE_BLOCK || variant == TREE_IF ||
variant == TREE_CALL || variant == TREE_WHILE ||
variant == TREE_DOWHILE || variant == TREE_FUN ||
variant == TREE_RETURN || variant == TREE_RESERVED_OP;
}
int libab_tree_has_string(libab_tree_variant variant) {
return variant == TREE_ID || variant == TREE_NUM || variant == TREE_OP ||
variant == TREE_PREFIX_OP || variant == TREE_POSTFIX_OP ||
variant == TREE_FUN || variant == TREE_FUN_PARAM ||
variant == TREE_RESERVED_OP;
}
int libab_tree_has_scope(libab_tree_variant variant) {
return variant == TREE_BASE || variant == TREE_BLOCK ||
variant == TREE_IF || variant == TREE_WHILE ||
variant == TREE_DOWHILE;
}
int libab_tree_has_type(libab_tree_variant variant) {
return variant == TREE_FUN_PARAM || variant == TREE_FUN;
}
void libab_tree_free(libab_tree* tree) {
int free_string = 0;
int free_vector = 0;
int free_type = 0;
free_vector = libab_tree_has_vector(tree->variant);
free_string = libab_tree_has_string(tree->variant);
free_type = libab_tree_has_type(tree->variant);
if (free_string)
free(tree->string_value);
if (free_vector)
vec_free(&tree->children);
if (free_type)
libab_ref_free(&tree->type);
}
int _tree_foreach_free(void* data, va_list args) {
libab_tree_free_recursive(data);
return 0;
}
int _tree_needs_free(libab_tree* tree) {
return ((tree->variant == TREE_FUN && --(tree->int_value) == 0) |
(tree->variant != TREE_FUN));
}
void libab_tree_free_recursive(libab_tree* tree) {
if(_tree_needs_free(tree)) {
if (libab_tree_has_vector(tree->variant)) {
vec_foreach(&tree->children, NULL, compare_always, _tree_foreach_free);
}
libab_tree_free(tree);
free(tree);
}
}
void libab_tree_refcount_free(libab_tree* tree) {
if(_tree_needs_free(tree)) {
libab_tree_free(tree);
free(tree);
}
}