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Added bounds checking to buffer

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This commit is contained in:
Sasha Koshka 2022-11-06 15:25:55 -05:00
parent ff7240d553
commit f98b551ba2
1 changed files with 24 additions and 3 deletions
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27
buffer.go
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@ -49,6 +49,15 @@ type Buffer struct {
} }
} }
func (buffer *Buffer) isOutOfBounds (x, y int) (outOfBounds bool) {
outOfBounds =
x < 0 ||
y < 0 ||
x >= buffer.width ||
y >= buffer.height
return
}
func (buffer *Buffer) Size () (width, height int) { func (buffer *Buffer) Size () (width, height int) {
width = buffer.width width = buffer.width
height = buffer.height height = buffer.height
@ -62,19 +71,23 @@ func (buffer *Buffer) SetSize (width, height int) {
} }
func (buffer *Buffer) Cell (x, y int) (cell Cell) { func (buffer *Buffer) Cell (x, y int) (cell Cell) {
if buffer.isOutOfBounds(x, y) { return }
cell = buffer.content[x + y * buffer.width] cell = buffer.content[x + y * buffer.width]
return return
} }
func (buffer *Buffer) SetColor (x, y int, color Color) { func (buffer *Buffer) SetColor (x, y int, color Color) {
if buffer.isOutOfBounds(x, y) { return }
buffer.content[x + y * buffer.width].color = color buffer.content[x + y * buffer.width].color = color
} }
func (buffer *Buffer) SetStyle (x, y int, style Style) { func (buffer *Buffer) SetStyle (x, y int, style Style) {
if buffer.isOutOfBounds(x, y) { return }
buffer.content[x + y * buffer.width].style = style buffer.content[x + y * buffer.width].style = style
} }
func (buffer *Buffer) SetRune (x, y int, content rune) { func (buffer *Buffer) SetRune (x, y int, content rune) {
if buffer.isOutOfBounds(x, y) { return }
buffer.content[x + y * buffer.width].content = content buffer.content[x + y * buffer.width].content = content
} }
@ -110,18 +123,24 @@ func (buffer *DamageBuffer) SetSize (width, height int) {
} }
func (buffer *DamageBuffer) SetColor (x, y int, color Color) { func (buffer *DamageBuffer) SetColor (x, y int, color Color) {
if buffer.isOutOfBounds(x, y) { return }
index := x + y * buffer.width
buffer.clean[index] = buffer.content[index].color == color
buffer.Buffer.SetColor(x, y, color) buffer.Buffer.SetColor(x, y, color)
buffer.clean[x + y * buffer.width] = false
} }
func (buffer *DamageBuffer) SetStyle (x, y int, style Style) { func (buffer *DamageBuffer) SetStyle (x, y int, style Style) {
if buffer.isOutOfBounds(x, y) { return }
index := x + y * buffer.width
buffer.clean[index] = buffer.content[index].style == style
buffer.Buffer.SetStyle(x, y, style) buffer.Buffer.SetStyle(x, y, style)
buffer.clean[x + y * buffer.width] = false
} }
func (buffer *DamageBuffer) SetRune (x, y int, content rune) { func (buffer *DamageBuffer) SetRune (x, y int, content rune) {
if buffer.isOutOfBounds(x, y) { return }
index := x + y * buffer.width
buffer.clean[index] = buffer.content[index].content == content
buffer.Buffer.SetRune(x, y, content) buffer.Buffer.SetRune(x, y, content)
buffer.clean[x + y * buffer.width] = false
} }
func (buffer *DamageBuffer) Write (bytes []byte) (bytesWritten int, err error) { func (buffer *DamageBuffer) Write (bytes []byte) (bytesWritten int, err error) {
@ -141,10 +160,12 @@ func (buffer *DamageBuffer) Write (bytes []byte) (bytesWritten int, err error) {
} }
func (buffer *DamageBuffer) Clean (x, y int) (clean bool) { func (buffer *DamageBuffer) Clean (x, y int) (clean bool) {
if buffer.isOutOfBounds(x, y) { return }
clean = buffer.clean[x + y * buffer.width] clean = buffer.clean[x + y * buffer.width]
return return
} }
func (buffer *DamageBuffer) MarkClean (x, y int) { func (buffer *DamageBuffer) MarkClean (x, y int) {
if buffer.isOutOfBounds(x, y) { return }
buffer.clean[x + y * buffer.width] = true buffer.clean[x + y * buffer.width] = true
} }