1 #include "JSONChildren.h"
2 #include "JSONNode.h"
3
4 /*
5 * reserves a certain number of bytes, in memory saving mode it creates a special
6 * type of child container that will not autoshrink
7 */
reserve2(jsonChildren * & mine,json_index_t amount)8 void jsonChildren::reserve2(jsonChildren *& mine, json_index_t amount) json_nothrow {
9 if (mine -> array != 0){
10 if (mine -> mycapacity < amount){
11 mine -> inc(amount - mine -> mycapacity);
12 #ifdef JSON_LESS_MEMORY
13 mine = jsonChildren_Reserved::newChildren_Reserved(mine, amount);
14 #endif
15 }
16 } else {
17 mine -> reserve(amount);
18 }
19 }
20
21 /*
22 clang objects to testing pointers to be non-null:
23 warning: 'this' pointer cannot be null in well-defined C++ code ...
24 */
inc(void)25 void jsonChildren::inc(void) json_nothrow {
26 // JSON_ASSERT(this != 0, JSON_TEXT("Children is null inc"));
27 if (json_unlikely(mysize == mycapacity)){ //it's full
28 if (json_unlikely(mycapacity == 0)){ //the array hasn't been created yet
29 // JSON_ASSERT(!array, JSON_TEXT("Expanding a 0 capacity array, but not null"));
30 #ifdef JSON_LESS_MEMORY
31 array = json_malloc<JSONNode*>(1);
32 mycapacity = 1;
33 #else
34 array = json_malloc<JSONNode*>(8); //8 seems average for JSON, and it's only 64 bytes
35 mycapacity = 8;
36 #endif
37 } else {
38 #ifdef JSON_LESS_MEMORY
39 mycapacity += 1; //increment the size of the array
40 #else
41 mycapacity <<= 1; //double the size of the array
42 #endif
43 array = json_realloc<JSONNode*>(array, mycapacity);
44 }
45 }
46 }
47
48
inc(json_index_t amount)49 void jsonChildren::inc(json_index_t amount) json_nothrow {
50 // JSON_ASSERT(this != 0, JSON_TEXT("Children is null inc(amount)"));
51 if (json_unlikely(amount == 0)) return;
52 if (json_likely(mysize + amount >= mycapacity)){ //it's full
53 if (json_unlikely(mycapacity == 0)){ //the array hasn't been created yet
54 // JSON_ASSERT(!array, JSON_TEXT("Expanding a 0 capacity array, but not null"));
55 #ifdef JSON_LESS_MEMORY
56 array = json_malloc<JSONNode*>(amount);
57 mycapacity = amount;
58 #else
59 array = json_malloc<JSONNode*>(amount > 8 ? amount : 8); //8 seems average for JSON, and it's only 64 bytes
60 mycapacity = amount > 8 ? amount : 8;
61 #endif
62 } else {
63 #ifdef JSON_LESS_MEMORY
64 mycapacity = mysize + amount; //increment the size of the array
65 #else
66 while(mysize + amount > mycapacity){
67 mycapacity <<= 1; //double the size of the array
68 }
69 #endif
70 array = json_realloc<JSONNode*>(array, mycapacity);
71 }
72 }
73 }
74
75 //actually deletes everything within the vector, this is safe to do on an empty or even a null array
deleteAll(void)76 void jsonChildren::deleteAll(void) json_nothrow {
77 // JSON_ASSERT(this != 0, JSON_TEXT("Children is null deleteAll"));
78 json_foreach(this, runner){
79 // JSON_ASSERT(*runner != 0, JSON_TEXT("a null pointer within the children"));
80 JSONNode::deleteJSONNode(*runner); //this is why I can't do forward declaration
81 }
82 }
83
doerase(JSONNode ** position,json_index_t number)84 void jsonChildren::doerase(JSONNode ** position, json_index_t number) json_nothrow {
85 // JSON_ASSERT(this != 0, JSON_TEXT("Children is null doerase"));
86 // JSON_ASSERT(array != 0, JSON_TEXT("erasing something from a null array 2"));
87 // JSON_ASSERT(position >= array, JSON_TEXT("position is beneath the start of the array 2"));
88 // JSON_ASSERT(position + number <= array + mysize, JSON_TEXT("erasing out of bounds 2"));
89 if (position + number >= array + mysize){
90 mysize = (json_index_t)(position - array);
91 #ifndef JSON_ISO_STRICT
92 // JSON_ASSERT((long long)position - (long long)array >= 0, JSON_TEXT("doing negative allocation"));
93 #endif
94 } else {
95 std::memmove(position, position + number, (mysize - (position - array) - number) * sizeof(JSONNode *));
96 mysize -= number;
97 }
98 }
99