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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "value.h"
#include "lexer.h"
// #ifdef ENABLE_MEMPOOL
#include "mempool.h"
MEMPOOL_GENERATE(value, struct value, 64)
#define value_alloc() value_mempool_allocate()
#define value_free(v) value_mempool_free(v)
// #else
// #define value_alloc() malloc(sizeof(struct value))
// #define value_free(v) free(v)
// #endif
const char * const value_type_string[] = {
VALUE_TYPES(TO_STRING)
};
#define FN(fn, ...) return fn(buf, buf_sz, __VA_ARGS__)
#define VALUE_STRING_TABLE(X, v, buf, buf_sz) \
X(VALUE_NIL, FN(snprintf, "(nil)")) \
X(VALUE_ATOM, FN(snprintf, "%s", vvalue_atom(v))) \
X(VALUE_STR, FN(snprintf, "%s", vvalue_str(v))) \
X(VALUE_INT, FN(snprintf, "%d", vvalue_num(v))) \
X(VALUE_CONS, FN(cons_print, &vvalue_cons(v))) \
X(VALUE_PROC, FN(proc_print, &vvalue_proc(v))) \
X(VALUE_MACRO, FN(proc_print, &vvalue_proc(v))) \
X(VALUE_PROC_BUILTIN, \
FN(snprintf, "%p", *(void **)&vvalue_proc_builtin(v).proc))
#define NOREFS(value) (value_dec_refs(value) == 0)
#define VALUE_DESTROY_TABLE(X, v) \
X(VALUE_NIL, (void)NOREFS(v)) \
X(VALUE_ATOM, if(NOREFS(v)) free(vvalue_atom(v))) \
X(VALUE_STR, if(NOREFS(v)) free(vvalue_str(v))) \
X(VALUE_INT, (void)NOREFS(v)) \
X(VALUE_CONS, if(NOREFS(v)) { \
value_destroy(vvalue_cons(v).left); \
value_destroy(vvalue_cons(v).right);}) \
X(VALUE_PROC, if(NOREFS(v)) proc_destroy(&vvalue_proc(v))) \
X(VALUE_MACRO, if(NOREFS(v)) proc_destroy(&vvalue_proc(v))) \
X(VALUE_PROC_BUILTIN, (void)NOREFS(v))
#define CREATE(vtype, value) return value_create(vtype, value)
#define VALUE_FROM_TOKEN_TABLE(X, t) \
X(TOKEN_INT, CREATE(VALUE_INT, &t->value.num)) \
X(TOKEN_STR, \
char *str = str_alloc_copy(t->value.str); \
CREATE(VALUE_STR, &str)) \
X(TOKEN_ID, \
char *atom = str_alloc_copy(t->value.id); \
CREATE(VALUE_ATOM, &atom))
#define CASE_APPLY(vtype, apply) \
case vtype: ; apply; break;
#define VALUE_MEMBER_TABLE(X) \
X(VALUE_ATOM, atom) \
X(VALUE_STR, str) \
X(VALUE_INT, num) \
X(VALUE_CONS, cons) \
X(VALUE_PROC, proc) \
X(VALUE_MACRO, proc) \
X(VALUE_PROC_BUILTIN, proc_builtin)
static char *str_alloc_copy(char *src);
static int cons_print(char *buf, size_t buf_sz, struct cons *cons);
static int proc_print(char *buf, size_t buf_sz, struct proc *proc);
static void proc_destroy(struct proc *proc);
#define MEMBER_COPY(vtype, member) \
case vtype: memcpy(&vvalue_##member(_value), value, \
sizeof(vvalue_##member(_value))); \
break;
value_t value_create(enum value_type type, void *value)
{
value_t _value = value_alloc();
value_set_type(_value, type);
switch(type) {
VALUE_MEMBER_TABLE(MEMBER_COPY);
default: break;
}
value_set_refs(_value, 1);
return _value;
}
void value_destroy(value_t value)
{
if(!value) return;
switch(value->type) {
VALUE_DESTROY_TABLE(CASE_APPLY, value);
}
if(vvalue_refs(value) == 0)
value_free(value);
}
value_t value_from_token(struct token *token)
{
switch(token->type)
{
VALUE_FROM_TOKEN_TABLE(CASE_APPLY, token)
default:
err("Cannot turn token '%s' to a value",
token_type_string[token->type]);
return VALUE_EMPTY;
}
}
value_t value_copy(value_t value)
{
if(!value) return value;
value_inc_refs(value);
return value;
}
int value_string(value_t value, size_t buf_sz, char *buf)
{
if(!value) return snprintf(buf, buf_sz, "(empty)");
switch(value->type) {
VALUE_STRING_TABLE(CASE_APPLY, value, buf, buf_sz)
}
return 0;
}
char *value_static_string(value_t value)
{
static char str[1024] = {0};
if(value_string(value, sizeof(str), str) > 0)
return str;
return NULL;
}
#ifdef DEBUG
void value_print(value_t value)
{
printf("%-12s %s", value ?
value_type_string[vvalue_type(value)] : "",
value_static_string(value));
}
#endif
static char *str_alloc_copy(char *src)
{
if(!src) return src;
size_t len = strlen(src) + 1;
return memcpy(malloc(len), src, len);
}
static int cons_print(char *buf, size_t buf_sz, struct cons *cons)
{
#define HAS_SPACE if(offset < buf_sz)
#define SET_CHAR(ch) HAS_SPACE { buf[offset++] = ch; }
#define SET_VALUE_STRING(v) \
HAS_SPACE { \
offset += value_string(v, buf_sz-offset, buf+offset); \
} /*else { \
offset += value_string(v, 0, NULL); \
} */
size_t offset = 0;
SET_CHAR('(');
SET_VALUE_STRING(cons->left);
value_t right = cons->right;
while(vvalue_type(right) == VALUE_CONS) {
SET_CHAR(' ');
SET_VALUE_STRING(right->value.cons.left);
right = right->value.cons.right;
}
if(vvalue_type(right) != VALUE_NIL) {
SET_CHAR(' ');
SET_CHAR('.');
SET_CHAR(' ');
SET_VALUE_STRING(right);
}
SET_CHAR(')');
SET_CHAR('\0') else {
if(buf_sz == 0) goto exit;
char str[] = "...)";
if(buf_sz <= sizeof(str)) {
buf[0] = '\0';
goto exit;
}
memcpy(buf+buf_sz - sizeof(str), str, sizeof(str));
}
exit:
return (int)offset-1; // -1 because of \0
}
static int proc_print(char *buf, size_t buf_sz, struct proc *proc)
{
(void)buf; (void)buf_sz;
(void)proc;
NOT_IMPLEMENTED();
return 0;
}
static void proc_destroy(struct proc *proc)
{
for(size_t i = 0; i < proc->argc; i++) value_destroy(proc->arg_keys[i]);
free(proc->arg_keys);
toklist_dealloc(proc->body);
env_destroy(proc->parent_env);
}
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