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/*
* esh, the Unix shell with Lisp-like syntax.
* Copyright (C) 1999 Ivan Tkatchev
* This source code is under the GPL.
*/
#include <stdlib.h>
#include <unistd.h>
#include "gc.h"
#include "list.h"
#include "hash.h"
extern int stderr_handler_fd;
list* ls_cons(void* data, list* ls) {
list* nw = (list*)gc_alloc(sizeof(list), "ls_cons");
nw->data = data;
nw->next = ls;
nw->type = TYPE_STRING;
nw->flag = FLAG_NONE;
return nw;
}
void ls_type_set(list* ls, char type) {
ls->type = type;
}
inline char ls_type(list* ls) {
return ls->type;
}
void ls_flag_set(list* ls, char flag) {
ls->flag = flag;
}
inline char ls_flag(list* ls) {
return ls->flag;
}
void ls_free(list* ls) {
if (!ls) return;
if (ls->next) {
ls_free(ls->next);
}
if (ls->type == TYPE_LIST) {
ls_free(ls->data);
}
gc_free(ls);
}
void ls_free_all(list* ls) {
if (!ls) return;
if (ls->next) {
ls_free_all(ls->next);
}
switch (ls->type) {
case TYPE_LIST:
ls_free_all(ls->data);
break;
case TYPE_STRING:
case TYPE_PROC:
if (ls->data)
gc_free(ls->data);
break;
case TYPE_FD:
if (gc_refs(ls->data) == 1) {
int* fd = ls->data;
if (fd[0] != STDIN_FILENO &&
fd[0] != stderr_handler_fd) {
close(fd[0]);
}
if (fd[1] != STDOUT_FILENO &&
fd[1] != STDERR_FILENO &&
fd[1] != fd[0] &&
fd[1] != stderr_handler_fd) {
close(fd[1]);
}
}
gc_free(ls->data);
break;
case TYPE_HASH:
hash_free(ls->data, gc_free, ls_free_all);
gc_free(ls->data);
break;
case TYPE_VOID:
case TYPE_BOOL:
break;
}
gc_free(ls);
}
void ls_free_shallow(list* ls) {
if (!ls) return;
if (ls->next) {
ls_free_shallow(ls->next);
}
gc_free(ls);
}
list* ls_reverse(list* ls) {
list* ret = NULL;
list* i = ls;
while (i) {
ret = ls_cons(i->data, ret);
ret->type = i->type;
ret->flag = i->flag;
i = i->next;
}
ls_free_shallow(ls);
return ret;
}
inline list* ls_next(list* ls) {
return ls->next;
}
inline void* ls_data(list* ls) {
return ls->data;
}
list* ls_copy(list* arg) {
list* ret = arg;
for (; arg != NULL; arg = ls_next(arg)) {
gc_inc_ref(arg);
switch (ls_type(arg)) {
case TYPE_LIST:
ls_copy(ls_data(arg));
break;
case TYPE_STRING:
case TYPE_FD:
case TYPE_PROC:
gc_inc_ref(ls_data(arg));
break;
case TYPE_HASH:
hash_inc_ref(ls_data(arg));
gc_inc_ref(ls_data(arg));
break;
case TYPE_VOID:
case TYPE_BOOL:
break;
}
}
return ret;
}
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