14191219880

Committed 01 Apr 2025 08:44AM CUT coverage: 99.832%. Remained the same

Build # 14191219880

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github

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web-flow

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Add awesome-go badge (#229)

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8298 of 8312 relevant lines covered (99.83%)

20284.26 hits per line

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100.0

/ecs/column.go

package ecs

import (
        "reflect"
        "unsafe"
)

// column storage for components in an table.
type column struct {
        pointer    unsafe.Pointer // pointer to the first element
        data       reflect.Value  // data buffer
        itemSize   uintptr        // memory size of items
        target     Entity         // target entity if for a relation component
        index      uint32         // index of the column in the containing table
        isRelation bool           // whether this column is for a relation component
}

// newColumn creates a new column for a given type and capacity.
func newColumn(index uint32, tp reflect.Type, itemSize uintptr, isRelation bool, target Entity, capacity uint32) column {
        // TODO: should be use a slice instead of an array here?
        data := reflect.New(reflect.ArrayOf(int(capacity), tp)).Elem()
        pointer := data.Addr().UnsafePointer()

        return column{
                index:      index,
                data:       data,
                pointer:    pointer,
                itemSize:   itemSize,
                isRelation: isRelation,
                target:     target,
        }
}

// Get returns a pointer to the component at the given index.
func (c *column) Get(index uintptr) unsafe.Pointer {
        return unsafe.Add(c.pointer, index*c.itemSize)
}

func (c *column) SetLast(other *column, ownLen uint32, count uint32) {
        start := ownLen - count
        src := other.Get(0)
        dst := c.Get(uintptr(start))
        copyPtr(src, dst, c.itemSize*uintptr(count))
}

// Set overwrites the component at the given index.
func (c *column) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {
        dst := c.Get(uintptr(index))
        if c.itemSize == 0 {
                return dst
        }

        copyPtr(comp, dst, uintptr(c.itemSize))
        return dst
}

// Zero resets the memory at the given index.
func (c *column) Zero(index uintptr, zero unsafe.Pointer) {
        if c.itemSize == 0 {
                return
        }
        dst := unsafe.Add(c.pointer, index*c.itemSize)
        copyPtr(zero, dst, uintptr(c.itemSize))
}

// Zero resets a block of storage in one buffer.
func (c *column) ZeroRange(start, len uint32, zero unsafe.Pointer) {
        size := uint32(c.itemSize)
        if size == 0 {
                return
        }
        var i uint32
        for i = 0; i < len; i++ {
                dst := unsafe.Add(c.pointer, (i+start)*size)
                copyPtr(zero, dst, c.itemSize)
        }
}

func (c *column) Reset(ownLen uint32, zero unsafe.Pointer) {
        if ownLen == 0 {
                return
        }
        if ownLen <= 64 { // A coarse estimate where manually zeroing is faster
                c.ZeroRange(0, ownLen, zero)
        } else {
                c.data.SetZero()
        }
}

// entityColumn storage for entities in an table.
type entityColumn struct {
        pointer unsafe.Pointer // pointer to the first element
        data    reflect.Value  // data buffer
}

// newColumn creates a new column for a given type and capacity.
func newEntityColumn(capacity uint32) entityColumn {
        // TODO: should be use a slice instead of an array here?
        data := reflect.New(reflect.ArrayOf(int(capacity), entityType)).Elem()
        pointer := data.Addr().UnsafePointer()

        return entityColumn{
                data:    data,
                pointer: pointer,
        }
}

// Get returns a pointer to the component at the given index.
func (c *entityColumn) Get(index uintptr) unsafe.Pointer {
        return unsafe.Add(c.pointer, index*entitySize)
}

func (c *entityColumn) SetLast(other *entityColumn, ownLen uint32, count uint32) {
        start := ownLen - count
        src := other.Get(0)
        dst := c.Get(uintptr(start))
        copyPtr(src, dst, entitySize*uintptr(count))
}

// Set overwrites the component at the given index.
func (c *entityColumn) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {
        dst := c.Get(uintptr(index))

        copyPtr(comp, dst, entitySize)
        return dst
}

1	package ecs
2
3	import (
4	"reflect"
5	"unsafe"
6	)
7
8	// column storage for components in an table.
9	type column struct {
10	pointer unsafe.Pointer // pointer to the first element
11	data reflect.Value // data buffer
12	itemSize uintptr // memory size of items
13	target Entity // target entity if for a relation component
14	index uint32 // index of the column in the containing table
15	isRelation bool // whether this column is for a relation component
16	}
17
18	// newColumn creates a new column for a given type and capacity.
19	func newColumn(index uint32, tp reflect.Type, itemSize uintptr, isRelation bool, target Entity, capacity uint32) column {	2,373✔
20	// TODO: should be use a slice instead of an array here?	2,373✔
21	data := reflect.New(reflect.ArrayOf(int(capacity), tp)).Elem()	2,373✔
22	pointer := data.Addr().UnsafePointer()	2,373✔
23		2,373✔
24	return column{	2,373✔
25	index: index,	2,373✔
26	data: data,	2,373✔
27	pointer: pointer,	2,373✔
28	itemSize: itemSize,	2,373✔
29	isRelation: isRelation,	2,373✔
30	target: target,	2,373✔
31	}	2,373✔
32	}	2,373✔
33
34	// Get returns a pointer to the component at the given index.
35	func (c *column) Get(index uintptr) unsafe.Pointer {	2,016,607✔
36	return unsafe.Add(c.pointer, index*c.itemSize)	2,016,607✔
37	}	2,016,607✔
38
39	func (c column) SetLast(other column, ownLen uint32, count uint32) {	463✔
40	start := ownLen - count	463✔
41	src := other.Get(0)	463✔
42	dst := c.Get(uintptr(start))	463✔
43	copyPtr(src, dst, c.itemSize*uintptr(count))	463✔
44	}	463✔
45
46	// Set overwrites the component at the given index.
47	func (c *column) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {	883✔
48	dst := c.Get(uintptr(index))	883✔
49	if c.itemSize == 0 {	939✔
50	return dst	56✔
51	}	56✔
52
53	copyPtr(comp, dst, uintptr(c.itemSize))	827✔
54	return dst	827✔
55	}
56
57	// Zero resets the memory at the given index.
58	func (c *column) Zero(index uintptr, zero unsafe.Pointer) {	498,420✔
59	if c.itemSize == 0 {	498,649✔
60	return	229✔
61	}	229✔
62	dst := unsafe.Add(c.pointer, index*c.itemSize)	498,191✔
63	copyPtr(zero, dst, uintptr(c.itemSize))	498,191✔
64	}
65
66	// Zero resets a block of storage in one buffer.
67	func (c *column) ZeroRange(start, len uint32, zero unsafe.Pointer) {	876✔
68	size := uint32(c.itemSize)	876✔
69	if size == 0 {	907✔
70	return	31✔
71	}	31✔
72	var i uint32	845✔
73	for i = 0; i < len; i++ {	11,934✔
74	dst := unsafe.Add(c.pointer, (i+start)*size)	11,089✔
75	copyPtr(zero, dst, c.itemSize)	11,089✔
76	}	11,089✔
77	}
78
79	func (c *column) Reset(ownLen uint32, zero unsafe.Pointer) {	889✔
80	if ownLen == 0 {	892✔
81	return	3✔
82	}	3✔
83	if ownLen <= 64 { // A coarse estimate where manually zeroing is faster	1,762✔
84	c.ZeroRange(0, ownLen, zero)	876✔
85	} else {	886✔
86	c.data.SetZero()	10✔
87	}	10✔
88	}
89
90	// entityColumn storage for entities in an table.
91	type entityColumn struct {
92	pointer unsafe.Pointer // pointer to the first element
93	data reflect.Value // data buffer
94	}
95
96	// newColumn creates a new column for a given type and capacity.
97	func newEntityColumn(capacity uint32) entityColumn {	826✔
98	// TODO: should be use a slice instead of an array here?	826✔
99	data := reflect.New(reflect.ArrayOf(int(capacity), entityType)).Elem()	826✔
100	pointer := data.Addr().UnsafePointer()	826✔
101		826✔
102	return entityColumn{	826✔
103	data: data,	826✔
104	pointer: pointer,	826✔
105	}	826✔
106	}	826✔
107
108	// Get returns a pointer to the component at the given index.
109	func (c *entityColumn) Get(index uintptr) unsafe.Pointer {	2,972,665✔
110	return unsafe.Add(c.pointer, index*entitySize)	2,972,665✔
111	}	2,972,665✔
112
113	func (c entityColumn) SetLast(other entityColumn, ownLen uint32, count uint32) {	215✔
114	start := ownLen - count	215✔
115	src := other.Get(0)	215✔
116	dst := c.Get(uintptr(start))	215✔
117	copyPtr(src, dst, entitySize*uintptr(count))	215✔
118	}	215✔
119
120	// Set overwrites the component at the given index.
121	func (c *entityColumn) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {	499,779✔
122	dst := c.Get(uintptr(index))	499,779✔
123		499,779✔
124	copyPtr(comp, dst, entitySize)	499,779✔
125	return dst	499,779✔
126	}	499,779✔

mlange-42 / ark / 14191219880

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