type Chunk struct {
	Buffer      MappingsBuffer
	QuotedNames [][]byte

	// This end state will be used to rewrite the start of the following source
	// map chunk so that the delta-encoded VLQ numbers are preserved.
	EndState SourceMapState

	// There probably isn't a source mapping at the end of the file (nor should
	// there be) but if we're appending another source map chunk after this one,
	// we'll need to know how many characters were in the last line we generated.
	FinalGeneratedColumn int

	ShouldIgnore bool
}

type ChunkBuilder struct {
	// contains filtered or unexported fields
}

type LineColumnOffset struct {
	Lines   int
	Columns int
}

type LineOffsetTable struct {
	// contains filtered or unexported fields
}

type Mapping struct {
	GeneratedLine   int32 // 0-based
	GeneratedColumn int32 // 0-based count of UTF-16 code units

	SourceIndex    int32       // 0-based
	OriginalLine   int32       // 0-based
	OriginalColumn int32       // 0-based count of UTF-16 code units
	OriginalName   ast.Index32 // 0-based, optional
}

type MappingsBuffer struct {
	Data            []byte
	FirstNameOffset ast.Index32
}

type SourceContent struct {
	// This stores both the unquoted and the quoted values. We try to use the
	// already-quoted value if possible so we don't need to re-quote it
	// unnecessarily for maximum performance.
	Quoted string

	// But sometimes we need to re-quote the value, such as when it contains
	// non-ASCII characters and we are in ASCII-only mode. In that case we quote
	// this parsed UTF-16 value.
	Value []uint16
}

type SourceMap struct {
	Sources        []string
	SourcesContent []SourceContent
	Mappings       []Mapping
	Names          []string
}

type SourceMapPieces struct {
	Prefix   []byte
	Mappings []byte
	Suffix   []byte
}

type SourceMapShift struct {
	Before LineColumnOffset
	After  LineColumnOffset
}

type SourceMapState struct {
	// This isn't stored in the source map. It's only used by the bundler to join
	// source map chunks together correctly.
	GeneratedLine int

	// These are stored in the source map in VLQ format.
	GeneratedColumn int
	SourceIndex     int
	OriginalLine    int
	OriginalColumn  int
	OriginalName    int
	HasOriginalName bool
}