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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* OPTIM: is it faster to store void *end? */
typedef struct {
size_t len;
size_t cap;
MaxAlign data[];
} ArrHeader;
static inline ArrHeader *arr_hdr(void *arr) {
ArrHeader *hdr = (ArrHeader *)((char *)arr - offsetof(ArrHeader, data));
return hdr;
}
static inline size_t arr_len(void *arr) {
if (arr == NULL) return 0;
return arr_hdr(arr)->len;
}
static void arr_resv_(void **arr, size_t n, size_t item_sz) {
if (*arr == NULL) {
ArrHeader *hdr = err_malloc(item_sz * n + sizeof(ArrHeader) + 1); /* +1 => prevent ptr overflow */
hdr->len = 0;
hdr->cap = n;
*arr = hdr->data;
} else {
ArrHeader *hdr = arr_hdr(*arr);
hdr->cap = n;
hdr = err_realloc(hdr, item_sz * n + sizeof(ArrHeader) + 1);
if (hdr->len > hdr->cap) hdr->len = hdr->cap;
*arr = hdr->data;
}
}
static void arr_resva_(void **arr, size_t n, size_t item_sz, Allocator *a) {
if (*arr == NULL) {
ArrHeader *hdr = allocr_malloc(a, item_sz * n + sizeof(ArrHeader));
hdr->len = 0;
hdr->cap = n;
*arr = hdr->data;
} else {
ArrHeader *hdr = arr_hdr(*arr);
hdr = allocr_realloc(a, hdr, item_sz * hdr->cap + sizeof(ArrHeader), item_sz * n + sizeof(ArrHeader));
hdr->cap = n;
if (hdr->len > hdr->cap) hdr->len = hdr->cap;
*arr = hdr->data;
}
}
static void arr_clear_(void **arr) {
if (*arr) {
free(arr_hdr(*arr));
*arr = NULL;
}
}
static void arr_set_len_(void **arr, size_t n, size_t item_sz) {
if (n == 0) {
arr_clear_(arr);
return;
}
arr_resv_(arr, n, item_sz);
arr_hdr(*arr)->len = n;
}
static void arr_set_lena_(void **arr, size_t n, size_t item_sz, Allocator *a) {
if (n == 0) {
/* OPTIM: arr_cleara */
}
arr_resva_(arr, n, item_sz, a);
arr_hdr(*arr)->len = n;
}
static void *arr_add_(void **arr, size_t item_sz) {
ArrHeader *hdr;
if (*arr == NULL) {
arr_resv_(arr, 10, item_sz);
hdr = arr_hdr(*arr);
} else {
hdr = arr_hdr(*arr);
if (hdr->len >= hdr->cap) {
arr_resv_(arr, hdr->len * 2 + 1, item_sz);
hdr = arr_hdr(*arr);
}
}
return &(((char *)hdr->data)[(hdr->len++) * item_sz]);
}
static void *arr_adda_(void **arr, size_t item_sz, Allocator *a) {
ArrHeader *hdr;
if (*arr == NULL) {
arr_resva_(arr, 10, item_sz, a);
hdr = arr_hdr(*arr);
} else {
hdr = arr_hdr(*arr);
if (hdr->len >= hdr->cap) {
arr_resva_(arr, hdr->len * 2 + 1, item_sz, a);
hdr = arr_hdr(*arr);
}
}
return &(((char *)hdr->data)[(hdr->len++) * item_sz]);
}
static void *arr_last_(void *arr, size_t item_sz) {
if (arr) {
ArrHeader *hdr = arr_hdr(arr);
return hdr->len == 0 ? NULL : (char *)hdr->data + (hdr->len-1) * item_sz;
} else {
return NULL;
}
}
/* OPTIM: shrink array */
static void arr_remove_last_(void **arr, size_t item_sz) {
assert(arr_hdr(*arr)->len);
arr_hdr(*arr)->len--; (void)item_sz;
}
static void arr_copya_(void **out, void *in, size_t item_sz, Allocator *a) {
size_t len = arr_len(in);
arr_resva_(out, len, item_sz, a);
memcpy(*out, in, len * item_sz);
}
#ifdef __GNUC__
#define typeof __typeof__
#endif
#if defined(__GNUC__) || defined(__TINYC__)
#define HAS_TYPEOF 1
#endif
#if HAS_TYPEOF
/*
this is to cast the return value of arr_add so that gcc produces a warning if you
do something like:
float *arr = NULL;
// ...
int *x = arr_add(&arr);
You shouldn't rely on this, though, e.g. by doing
*arr_add(&arr) = 17;
*/
#define arr_ptr_type(arr) __typeof__(*(arr))
#else
#define arr_ptr_type(arr) void *
#endif
#define arr_add(arr) (arr_ptr_type(arr))arr_add_((void **)(arr), sizeof **(arr))
#define arr_adda(arr, allocr) (arr_ptr_type(arr))arr_adda_((void **)(arr), sizeof **(arr), allocr)
#define arr_resv(arr, n) arr_resv_((void **)(arr), n, sizeof **(arr))
#define arr_resva(arr, n, allocr) arr_resva_((void **)(arr), n, sizeof **(arr), allocr)
#define arr_set_len(arr, n) arr_set_len_((void **)(arr), n, sizeof **(arr))
#define arr_set_lena(arr, n, a) arr_set_lena_((void **)(arr), n, sizeof **(arr), a)
#define arr_clear(arr) arr_clear_((void **)(arr)), (void)sizeof **arr /* second part makes sure most of the time that you don't accidentally call it without taking the address */
#define arr_last(arr) arr_last_((void *)(arr), sizeof *(arr))
#define arr_foreach(arr, type, var) for (type *var = arr_len(arr) ? arr : NULL, *var##_foreach_end = arr_last(arr); var; var == var##_foreach_end ? var = NULL : var++)
#define arr_remove_last(arr) arr_remove_last_((void **)(arr), sizeof **(arr))
#define arr_copya(out, in, a) do { assert(sizeof *(in) == sizeof **(out)); arr_copya_((void **)(out), (in), sizeof **(out), (a)); } while(0)
#ifdef TOC_DEBUG
static void arr_test(void) {
int *foos = NULL;
for (int i = 0; i < 1000; i++) {
*(int *)arr_add(&foos) = i;
}
for (int i = 0; i < (int)arr_len(foos); i++) {
assert(foos[i] == i);
}
int lastx = -1;
arr_foreach(foos, int, x) {
assert(*x == lastx + 1);
lastx = *x;
}
arr_clear(&foos);
}
#endif
|
