1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// Type infos and methods for Pointer types
#include <ctype.h>
#include <err.h>
#include <gc.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/param.h>
#include "integers.h"
#include "metamethods.h"
#include "tables.h"
#include "text.h"
#include "types.h"
#include "util.h"
public Text_t Pointer$as_text(const void *x, bool colorize, const TypeInfo_t *type) {
auto ptr_info = type->PointerInfo;
if (!x) {
Text_t typename = generic_as_text(NULL, false, ptr_info.pointed);
Text_t text;
if (colorize)
text = Text$concat(Text("\x1b[34;1m"), Text$from_str(ptr_info.sigil), typename, Text("\x1b[m"));
else
text = Text$concat(Text$from_str(ptr_info.sigil), typename);
return text;
}
const void *ptr = *(const void**)x;
if (!ptr) {
Text_t typename = generic_as_text(NULL, false, ptr_info.pointed);
if (colorize)
return Text$concat(Text("\x1b[34;1m!"), typename, Text("\x1b[m"));
else
return Text$concat(Text("!"), typename);
}
static const void *root = NULL;
static Table_t pending = {};
bool top_level = (root == NULL);
// Check for recursive references, so if `x.foo = x`, then it prints as
// `@Foo{foo=@~1}` instead of overflowing the stack:
if (top_level) {
root = ptr;
} else if (ptr == root) {
return Text$format(colorize ? "\x1b[34;1m%s~1\x1b[m" : "%s~1", ptr_info.sigil);
} else {
TypeInfo_t rec_table = *Table$info(type, &Int64$info);
int64_t *id = Table$get(pending, x, &rec_table);
if (id)
return Text$format(colorize ? "\x1b[34;1m%s~%ld\x1b[m" : "%s~%ld", ptr_info.sigil, *id);
int64_t next_id = pending.entries.length + 2;
Table$set(&pending, x, &next_id, &rec_table);
}
Text_t pointed = generic_as_text(ptr, colorize, ptr_info.pointed);
if (top_level) {
pending = (Table_t){}; // Restore
root = NULL;
}
Text_t text;
if (colorize)
text = Text$concat(Text("\x1b[34;1m"), Text$from_str(ptr_info.sigil), Text("\x1b[m"), pointed);
else
text = Text$concat(Text$from_str(ptr_info.sigil), pointed);
return text;
}
PUREFUNC public int32_t Pointer$compare(const void *x, const void *y, const TypeInfo_t*) {
const void *xp = *(const void**)x, *yp = *(const void**)y;
return (xp > yp) - (xp < yp);
}
PUREFUNC public bool Pointer$equal(const void *x, const void *y, const TypeInfo_t*) {
const void *xp = *(const void**)x, *yp = *(const void**)y;
return xp == yp;
}
PUREFUNC public bool Pointer$is_none(const void *x, const TypeInfo_t*)
{
return *(void**)x == NULL;
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
|
