Single header Parser Combinators for C

CParseC is a single-header C library that provides parser combinators inspired by Haskell's Parsec, enabling developers to write flexible, maintainable parsers in plain C99 without external dependencies. The library offers zero-copy parsing with user-supplied memory management and uses macros for inlining-friendly code, demonstrating performance advantages—such as being 1.3x faster than Rust's rust-csv library and 20x faster than attoparsec-csv when parsing CSV files. It includes composable macros for common parsing patterns like string matching, alternation, repetition, and separator-based parsing, making it a practical alternative to hand-written parsers or code generators like Flex and Bison.