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#include "token.h"
#include "slice.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
Token *
token_create(Slice slice, unsigned int type)
{
Token *token = malloc(sizeof(Token));
if (token == NULL) {
perror("token_create:malloc");
return NULL;
}
token->slice = slice;
token->type = type;
token->string_ptr = 0;
token->prev = NULL;
token->next = NULL;
return token;
}
void
token_destroy(Token *token)
{
while (token != NULL) {
Token *next = token->next;
if (token->type == TOK_GROUP) {
token_destroy(token->group.tokens);
token_destroy(token->group.scope);
}
free(token);
token = next;
}
}
Token *
token_append(Token **list, Token *elem)
{
if (*list == NULL) {
*list = elem;
return *list;
}
Token *end = token_last(*list);
end->next = elem;
elem->prev = end;
return *list;
}
Token *
token_prepend(Token **list, Token *elem)
{
elem->next = *list;
if (*list)
(*list)->prev = elem;
*list = elem;
return *list;
}
void
token_delete(Token **list, Token *elem)
{
token_extract(list, elem);
free(elem);
}
Token *
token_extract(Token **list, Token *elem)
{
if (elem->prev != NULL)
elem->prev->next = elem->next;
if (elem->next != NULL)
elem->next->prev = elem->prev;
if (*list == elem)
*list = elem->next;
elem->prev = NULL;
elem->next = NULL;
return elem;
}
Token *
token_search(Token *list, unsigned int type)
{
while (list != NULL) {
if (list->type == type)
return list;
list = list->next;
}
return NULL;
}
Token *
token_search_closing(Token *list, unsigned int type, unsigned int opn)
{
int count = 0;
while (list != NULL) {
if (list->type == opn)
count += 1;
if (list->type == type) {
count -= 1;
if (count <= 0)
return list;
}
list = list->next;
}
return NULL;
}
Token *
token_print(Token *token, int recurse, int depth)
{
Token *tok = token;
while (token != NULL) {
for (int i = 0; i < depth * 2; i++)
putchar(' ');
if (token->type == TOK_GROUP) {
printf("type: TOK_GROUP group.type: %c\n",
token->group.type);
if (token->group.scope != NULL)
token_print(token->group.scope, 1, depth);
token_print(token->group.tokens, 1, depth + 1);
} else {
printf("type: %c slice: \"", token->type);
slice_write(token->slice);
printf("\"");
if (token->type == TOK_STRING)
printf(" string_ptr: %ld", token->string_ptr);
printf("\n");
}
if (!recurse)
return tok;
token = token->next;
}
return tok;
}
int
token_isgroup(Token *token, unsigned int type)
{
return (token->type == TOK_GROUP && token->group.type == type);
}
int
token_len(Token *token)
{
int len = 0;
while (token != NULL) {
len += 1;
token = token->next;
}
return len;
}
Token *
token_last(Token *token)
{
if (token == NULL)
return NULL;
while (token->next != NULL)
token = token->next;
return token;
}
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