DataViewer

A blazingly fast, memory-efficient, terminal-based viewer for CSV files and other delimited data.

Features

• High Performance: Uses memory-mapped I/O to handle files of any size with minimal memory usage.
• Smart Parsing: Automatically detects common delimiters (,, ;, |, \t).
• Encoding Support: Correctly renders UTF-8 and Latin-1 encoded files.

Building

Dependencies

• A C compiler (gcc or clang)
• make
• ncurses development libraries

On macOS (with Homebrew):

brew install ncurses

On Debian/Ubuntu:

sudo apt-get update && sudo apt-get install build-essential libncurses-dev

Compilation

Build the optimized release version:

make

Build a debug version with address sanitizer:

make debug

Usage

To view a file:

./bin/dv <your_file.csv>

In-App Commands

Key(s)	Action
q	Quit the application
h	Show the help screen
Arrow Keys	Navigate between cells/rows
Page Up/Dn	Scroll up or down by one page
Home/End	Jump to the top/bottom of file
y	Copy cell content to clipboard

Development

Run the test suite:

make test

Clean the build artifacts:

make clean