diff

Documentation

Index

• func MapOldLineToNew(entries []DiffEntry) map[int]int
• func SplitLines(content string) []string
• type DiffEntry
  • func ComputeLineDiff(oldContent, newContent string) []DiffEntry

Functions

func MapOldLineToNew

func MapOldLineToNew(entries []DiffEntry) map[int]int

MapOldLineToNew builds a mapping from old line numbers to new line numbers using the diff entries. For unchanged lines it maps directly. For removed lines it maps to the nearest subsequent new line in the new document. Returns a map[int]int where key=old line, value=new line.

func SplitLines

func SplitLines(content string) []string

SplitLines splits content into lines, returning an empty slice for empty input.

Types

type DiffEntry

type DiffEntry struct {
	Type    string `json:"type"`               // "unchanged", "added", or "removed"
	OldLine int    `json:"old_line,omitempty"` // 1-based line number in old content (0 if added)
	NewLine int    `json:"new_line,omitempty"` // 1-based line number in new content (0 if removed)
	Text    string `json:"text"`
}

DiffEntry represents a single line in the diff output.

func ComputeLineDiff

func ComputeLineDiff(oldContent, newContent string) []DiffEntry

ComputeLineDiff computes a line-level diff between oldContent and newContent using Hirschberg's algorithm (divide-and-conquer LCS in O(n) space). Each line is classified as "unchanged", "added", or "removed".