go-btrieve

Golang library for Btrieve / Actian Zen / PSQL

Notes:

This library will be updated, over time, as needed. While it is currently not fully complete (by far), it does offer the critical pieces needed to open and access a Btrieve file on a Windows system.

The library supports both Windows 32-bit (WBTRV32.DLL) and Windows 64-bit (w64btrv.dll) architectures. It has been tested with PSQL 9, PSQL 11, Zen 13, and Zen 14.

Please note that 64-bit binaries cannot load 32-bit DLLs and vice-versa. If you need to deploy to a 32-bit system, you must first build the program. Also note that as of go v 12, there seems to be a bug where the 32-bit exe does not properly work on older (Windows 2k3, etc.) systems, but these exe's do seem to work on later versions, such as Win2k19. To set the OS and architecture targets, you must set 2 environmental variables.

• GOOS=Windows
• GOARCH=386

Example code to open a file (in read only mode), read the first record, and close the file.

func example() {
	var (
		posblk     = make([]uint16, 160)
		dataBuffer = make([]byte, 256)
		dataLength = uint32(len(dataBuffer))
		dbfile     = []byte(`file.dat` + "\x00")
		keyBuffer  = make([]byte, 255)
		keyNumber  = int8(-2) // read only mode
		ist        uint16
    	)

	ist, err = btrieve.BTRV(btrieve.B_OPEN, posblk, dataBuffer, dataLength, dbfile, keyNumber)
	if err != nil {
		log.Printf("Error initializing btrieve. %s", err.Error())
	} else if ist != 0 {
		log.Println("Error opening %s. %d", string(dfbile), ist)
	} else {
		log.Printf("Successfully opened %s.", string(dbfile))
		// Success
		keyNumber = int8(0)
		ist, _ = btrieve.BTRV(btrieve.B_GET_FIRST, posblk, dataBuffer, dataLength, keyBuffer, keyNumber)
		fmt.Println("KEY", string(keyBuffer))
        	fmt.Println("DATA", string(dataBuffer))

    		ist, _ = btrieve.BTRV(btrieve.B_CLOSE, posblk, dataBuffer, dataLength, dbfile, keyNumber)
    		if ist != 0 {
	    		log.Printf("Error closing %s. %s", string(dbfile), err.Error())
	    	}

    		btrieve.Release()
	}
}

Hope this library helps!