func readFileContents()

in Sources/TSCBasic/FileSystem.swift [402:430]

• 25 lines of code
• 7 McCabe index (conditional complexity)

    func readFileContents(_ path: AbsolutePath) throws -> ByteString {
        // Open the file.
        let fp = fopen(path.pathString, "rb")
        if fp == nil {
            throw FileSystemError(errno: errno, path)
        }
        defer { fclose(fp) }

        // Read the data one block at a time.
        let data = BufferedOutputByteStream()
        var tmpBuffer = [UInt8](repeating: 0, count: 1 << 12)
        while true {
            let n = fread(&tmpBuffer, 1, tmpBuffer.count, fp)
            if n < 0 {
                if errno == EINTR { continue }
                throw FileSystemError(.ioError(code: errno), path)
            }
            if n == 0 {
                let errno = ferror(fp)
                if errno != 0 {
                    throw FileSystemError(.ioError(code: errno), path)
                }
                break
            }
            data <<< tmpBuffer[0..<n]
        }

        return data.bytes
    }