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scs-extract/scs/meta.go

89 lines
1.9 KiB
Go

package scs
const offsetBlockSize = 16 // byte
type (
iMetaEntry interface {
Fill(*catalogMetaEntry)
}
metaEntry struct {
t metaEntryType
p iMetaEntry
}
metaEntryBrokenOctal [3]byte
metaEntryBrokenOctalImage [4]byte
metaEntryType struct {
Index metaEntryBrokenOctal
Type catalogMetaEntryType
}
metaEntryDir struct {
CompressedSize metaEntryBrokenOctal
Flags byte
Size uint32
Unknown2 uint32
OffsetBlock uint32
}
metaEntryFile struct {
CompressedSize metaEntryBrokenOctal
Flags byte
Size uint32
Unknown2 uint32
OffsetBlock uint32
}
metaEntryImage struct {
Unknown1 uint64
TextureWidth uint16
TextureHeight uint16
ImgFlags uint32
SampleFlags uint32
CompressedSize metaEntryBrokenOctalImage
Unknown3 [8]byte
OffsetBlock uint32
}
)
func (m metaEntry) Fill(c *catalogMetaEntry) {
c.Index = m.t.Index.Uint32()
m.p.Fill(c)
}
func (m metaEntryDir) Fill(c *catalogMetaEntry) {
c.IsDirectory = true
c.Offset = uint64(m.OffsetBlock) * offsetBlockSize
c.CompressedSize = m.CompressedSize.Uint32()
c.Size = m.Size
c.Flags = m.Flags
}
func (m metaEntryFile) Fill(c *catalogMetaEntry) {
c.Offset = uint64(m.OffsetBlock) * offsetBlockSize
c.CompressedSize = m.CompressedSize.Uint32()
c.Size = m.Size
c.Flags = m.Flags
}
func (m metaEntryImage) Fill(c *catalogMetaEntry) {
c.Offset = uint64(m.OffsetBlock) * offsetBlockSize
c.CompressedSize = m.CompressedSize.Uint32()
c.Size = m.CompressedSize.Uint32()
c.IsCompressed = m.CompressedSize.IsCompressed()
}
func (m metaEntryBrokenOctal) Uint32() uint32 {
return uint32(m[0]) + uint32(m[1])<<8 + uint32(m[2])<<16
}
func (m metaEntryBrokenOctalImage) IsCompressed() bool {
return (m[3] & 0xf0) != 0 //nolint:mnd
}
func (m metaEntryBrokenOctalImage) Uint32() uint32 {
return uint32(m[0]) + uint32(m[1])<<8 + uint32(m[2])<<16 + uint32(m[3])<<24
}