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/*
* Copyright (c) 2026, Chloe M.
* Provided under the BSD-3 clause
*/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "cescal/symbol.h"
/*
* Push a symbol into a symbol table
*
* @symtab: Symbol table to push to
* @symbol: Symbol to push
*
* Returns zero on success
*/
static int
symbol_table_push(struct symbol_table *symtab, struct symbol *symbol)
{
if (symtab == NULL || symbol == NULL) {
errno = EINVAL;
return -1;
}
symbol->next = NULL;
if (symtab->head == NULL || symtab->tail == NULL) {
symtab->head = symbol;
symtab->tail = symbol;
} else {
symtab->head->next = symbol;
symtab->head = symbol;
}
return 0;
}
int
symbol_table_init(struct symbol_table *symtab)
{
if (symtab == NULL) {
errno = EINVAL;
return -1;
}
symtab->head = NULL;
symtab->tail = NULL;
return 0;
}
int
symbol_allocate(struct symbol_table *symtab, const char *name,
symtype_t type, struct symbol **res)
{
struct symbol *symbol;
if (symtab == NULL || name == NULL) {
errno = EINVAL;
return -1;
}
if (res == NULL) {
errno = EINVAL;
return -1;
}
symbol = malloc(sizeof(*symbol));
if (symbol == NULL) {
errno = -ENOMEM;
return -1;
}
symbol->name = strdup(name);
symbol->type = type;
if (symbol_table_push(symtab, symbol) < 0) {
free(symbol);
return -1;
}
*res = symbol;
return 0;
}
void
symbol_table_destroy(struct symbol_table *symtab)
{
struct symbol *symbol, *tmp;
if (symtab == NULL) {
return;
}
symbol = symtab->tail;
while (symbol != NULL) {
tmp = symbol;
if (tmp->name != NULL)
free(tmp->name);
free(tmp);
symbol = symbol->next;
}
}
struct symbol *
symbol_byname(struct symbol_table *symtab, const char *name)
{
struct symbol *symbol;
if (symtab == NULL || name == NULL) {
return NULL;
}
symbol = symtab->head;
while (symbol != NULL) {
if (*symbol->name != *name) {
symbol = symbol->next;
continue;
}
if (strcmp(symbol->name, name) == 0) {
return symbol;
}
symbol = symbol->next;
}
return NULL;
}
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