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Code Issues Activity

Codechange: address CodeQL issue "Multiplication result converted to larger type" (#10306)

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Most are very unlikely to ever be triggered in our codebase; two
stand out: linkgraph and money cheat. Those, potentially, could
wrap earlier than expected.
This commit is contained in:
Patric Stout
2023-01-02 21:30:02 +01:00
committed by GitHub
parent fcbe390353
commit 1fb101eabb
26 changed files with 74 additions and 66 deletions
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4
src/blitter/32bpp_anim.cpp
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@@ -478,9 +478,9 @@ void Blitter_32bppAnim::ScrollBuffer(void *video, int &left, int &top, int &widt
Blitter_32bppBase::ScrollBuffer(video, left, top, width, height, scroll_x, scroll_y);
}
int Blitter_32bppAnim::BufferSize(int width, int height)
size_t Blitter_32bppAnim::BufferSize(uint width, uint height)
{
return width * height * (sizeof(uint32) + sizeof(uint16));
return (sizeof(uint32) + sizeof(uint16)) * width * height;
}
void Blitter_32bppAnim::PaletteAnimate(const Palette &palette)

2
src/blitter/32bpp_anim.hpp
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@@ -43,7 +43,7 @@ public:
void CopyFromBuffer(void *video, const void *src, int width, int height) override;
void CopyToBuffer(const void *video, void *dst, int width, int height) override;
void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override;
int BufferSize(int width, int height) override;
size_t BufferSize(uint width, uint height) override;
void PaletteAnimate(const Palette &palette) override;
Blitter::PaletteAnimation UsePaletteAnimation() override;

4
src/blitter/32bpp_base.cpp
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@@ -140,9 +140,9 @@ void Blitter_32bppBase::ScrollBuffer(void *video, int &left, int &top, int &widt
}
}
int Blitter_32bppBase::BufferSize(int width, int height)
size_t Blitter_32bppBase::BufferSize(uint width, uint height)
{
return width * height * sizeof(uint32);
return sizeof(uint32) * width * height;
}
void Blitter_32bppBase::PaletteAnimate(const Palette &palette)

2
src/blitter/32bpp_base.hpp
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@@ -27,7 +27,7 @@ public:
void CopyToBuffer(const void *video, void *dst, int width, int height) override;
void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) override;
void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override;
int BufferSize(int width, int height) override;
size_t BufferSize(uint width, uint height) override;
void PaletteAnimate(const Palette &palette) override;
Blitter::PaletteAnimation UsePaletteAnimation() override;
int GetBytesPerPixel() override { return 4; }

9
src/blitter/40bpp_anim.cpp
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@@ -31,9 +31,10 @@ void Blitter_40bppAnim::SetPixel(void *video, int x, int y, uint8 colour)
if (_screen_disable_anim) {
Blitter_32bppOptimized::SetPixel(video, x, y, colour);
} else {
*((Colour *)video + x + y * _screen.pitch) = _black_colour;
size_t y_offset = static_cast<size_t>(y) * _screen.pitch;
*((Colour *)video + x + y_offset) = _black_colour;
VideoDriver::GetInstance()->GetAnimBuffer()[((uint32 *)video - (uint32 *)_screen.dst_ptr) + x + y * _screen.pitch] = colour;
VideoDriver::GetInstance()->GetAnimBuffer()[((uint32 *)video - (uint32 *)_screen.dst_ptr) + x + y_offset] = colour;
}
}
@@ -500,9 +501,9 @@ void Blitter_40bppAnim::ScrollBuffer(void *video, int &left, int &top, int &widt
Blitter_32bppBase::ScrollBuffer(video, left, top, width, height, scroll_x, scroll_y);
}
int Blitter_40bppAnim::BufferSize(int width, int height)
size_t Blitter_40bppAnim::BufferSize(uint width, uint height)
{
return width * height * (sizeof(uint32) + sizeof(uint8));
return (sizeof(uint32) + sizeof(uint8)) * width * height;
}
Blitter::PaletteAnimation Blitter_40bppAnim::UsePaletteAnimation()

2
src/blitter/40bpp_anim.hpp
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@@ -29,7 +29,7 @@ public:
void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override;
void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override;
Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override;
int BufferSize(int width, int height) override;
size_t BufferSize(uint width, uint height) override;
Blitter::PaletteAnimation UsePaletteAnimation() override;
bool NeedsAnimationBuffer() override;

4
src/blitter/8bpp_base.cpp
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@@ -144,9 +144,9 @@ void Blitter_8bppBase::ScrollBuffer(void *video, int &left, int &top, int &width
}
}
int Blitter_8bppBase::BufferSize(int width, int height)
size_t Blitter_8bppBase::BufferSize(uint width, uint height)
{
return width * height;
return static_cast<size_t>(width) * height;
}
void Blitter_8bppBase::PaletteAnimate(const Palette &palette)

2
src/blitter/8bpp_base.hpp
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@@ -25,7 +25,7 @@ public:
void CopyToBuffer(const void *video, void *dst, int width, int height) override;
void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) override;
void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override;
int BufferSize(int width, int height) override;
size_t BufferSize(uint width, uint height) override;
void PaletteAnimate(const Palette &palette) override;
Blitter::PaletteAnimation UsePaletteAnimation() override;
int GetBytesPerPixel() override { return 1; }

2
src/blitter/base.hpp
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@@ -170,7 +170,7 @@ public:
* @param height The height of the buffer-to-be.
* @return The size needed for the buffer.
*/
virtual int BufferSize(int width, int height) = 0;
virtual size_t BufferSize(uint width, uint height) = 0;
/**
* Called when the 8bpp palette is changed; you should redraw all pixels on the screen that

2
src/blitter/null.hpp
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@@ -27,7 +27,7 @@ public:
void CopyToBuffer(const void *video, void *dst, int width, int height) override {};
void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) override {};
void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override {};
int BufferSize(int width, int height) override { return 0; };
size_t BufferSize(uint width, uint height) override { return 0; };
void PaletteAnimate(const Palette &palette) override { };
Blitter::PaletteAnimation UsePaletteAnimation() override { return Blitter::PALETTE_ANIMATION_NONE; };