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Code Issues Releases Activity

Dict parsing

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This commit is contained in:
Romein van Buren
2025-06-12 10:43:02 +02:00
parent 8bf5cfeffd
commit 7dc88d96e9
3 changed files with 111 additions and 27 deletions
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59
fmp/fmp_file.go
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@ -18,24 +18,6 @@ const (
sectorHeaderSize = 20
)
type FmpFile struct {
VersionDate time.Time
CreatorName string
FileSize uint
NumSectors uint
Stream io.ReadSeeker
Sectors []*FmpSector
Chunks []*FmpChunk
}
type FmpSector struct {
Deleted bool
Level uint8
PrevSectorID uint32
NextSectorID uint32
Chunks []*FmpChunk
}
func OpenFile(path string) (*FmpFile, error) {
info, err := os.Stat(path)
if err != nil {
@ -48,7 +30,7 @@ func OpenFile(path string) (*FmpFile, error) {
}
defer stream.Close()
ctx := &FmpFile{Stream: stream}
ctx := &FmpFile{Stream: stream, Dictionary: &FmpDict{}}
if err := ctx.readHeader(); err != nil {
return nil, err
}
@ -57,6 +39,8 @@ func OpenFile(path string) (*FmpFile, error) {
ctx.NumSectors = ctx.FileSize / sectorSize
ctx.Sectors = make([]*FmpSector, ctx.NumSectors)
currentPath := make([]uint16, 0)
for i := uint(0); i < ctx.NumSectors; i++ {
sector, err := ctx.readSector()
if err == io.EOF {
@ -67,6 +51,43 @@ func OpenFile(path string) (*FmpFile, error) {
}
ctx.Sectors[i] = sector
ctx.Chunks = append(ctx.Chunks, sector.Chunks...)
for _, chunk := range sector.Chunks {
switch chunk.Type {
case FMP_CHUNK_PATH_PUSH:
currentPath = append(currentPath, uint16(chunk.Value[0]))
case FMP_CHUNK_PATH_POP:
if len(currentPath) > 0 {
currentPath = currentPath[:len(currentPath)-1]
}
case FMP_CHUNK_SIMPLE_DATA:
ctx.Dictionary.set(currentPath, chunk.Value)
case FMP_CHUNK_SEGMENTED_DATA:
// Todo: take index into account
ctx.Dictionary.set(
currentPath,
append(ctx.Dictionary.get(currentPath), chunk.Value...),
)
case FMP_CHUNK_SIMPLE_KEY_VALUE:
ctx.Dictionary.set(
append(currentPath, uint16(chunk.Key)),
chunk.Value,
)
case FMP_CHUNK_LONG_KEY_VALUE:
ctx.Dictionary.set(
append(currentPath, uint16(chunk.Key)), // todo: ??
chunk.Value,
)
case FMP_CHUNK_NOOP:
// noop
}
}
}
return ctx, nil