google/codesearch
Codesearch
Codesearch is an indexed code search engine and large-scale source indexer designed to execute regular expressions across extensive source code trees. It functions as a tool for finding specific text patterns in large codebases by analyzing and indexing massive volumes of source files for rapid retrieval.
The system utilizes a specialized trigram-based search index to accelerate complex regular expression queries. This indexing approach filters candidate documents via three-character sequences before applying full regular expression scans to ensure high performance on large datasets.
The engine handles Unicode text processing for UTF-8 and Latin-1 encoded content, ensuring consistent character matching and casing across different languages. Its capabilities cover source code indexing, pattern matching, and high-performance regular expression search.
Features
- Code Pattern Searches - Finds specific text patterns across large codebases by applying regular expressions to a source index.
- Trigram Indexes - Utilizes a trigram-based inverted index to filter candidate documents before applying full regular expression scans.
- Source Code Indexing - Analyzes large volumes of source code to create a searchable index for rapid retrieval of code segments.
- Regexp Code Search Engines - Provides a high-performance search engine using an inverted trigram index to execute regular expressions across code trees.
- Trigram-Based Indexing - Uses a specialized trigram-based index to filter candidate files and accelerate complex regular expression queries.
- Multi-Repository Code Searches - Enables finding specific text patterns or code segments across massive repositories using fast indexing.
- Regex Search Engines - Executes complex regular expression queries over large datasets with high performance via trigram filtering.
- Document Filtering - Identifies potential matches by executing regular expression queries against an optimized index to narrow document sets.
- Full-Text Inverted Indexes - Implements an inverted index that maps text fragments to file locations for rapid code retrieval.
- Text Pattern Search - Matches regular expressions against strings to identify the exact positions and boundaries of the found text.
- Filter-and-Scan Pipelines - Uses a fast initial index filter followed by a precise regular expression pass to locate exact boundaries.
- Code Analysis and Quality - Fast code search tool.
