OpenVMS Source-Code Demos

EBCDIC_ASCII.BAS

1000	%title "ebcdic-ascii_xxx.bas"
	%ident                      "version 102.1"				!
	declare string constant k_version = "102.1"			,	!			&
				k_program = "ebcdic-ascii"			!
	!====================================================================================================
	! title  : ebcdic-ascii_xxx.bas
	! author : Neil Rieck (email:n.rieck@sympatico.ca)
	! created: 2003.04.28
	! purpose: to demo routines to be used with OpenVMS BASIC programs communicating with TN3270 devices
	! history:
	! ver who when   what
	! --- --- ------ ------------------------------------------------------------------------------------
	! 100 NSR 020214 1. wrote "ebcdic-ascii.c"
	! 101 NSR 030428 1. converted "ebcdic-ascii.c" for use with Compaq-BASIC programs
	! 102 NSR 120723 1. added lib$tra_ebc_asc() and lib$tra_asc_ebc()
	!====================================================================================================
	option type=explicit							!
	!
	%include "lib$routines" %from %library "sys$library:basic$starlet"	! lib$ (needed for easy way)
	%include "$libdef"      %from %library "sys$library:basic$starlet"	! lib$_normal
	!
	declare string constant k_hex_string = "0123456789ABCDEF"		!
	!
	declare string	a_to_e$			,&
			e_to_a$			,&
			junk$			,&
			junk1$			,&
			junk2$			,&
			junk3$			,&
			junk9$			,&
		long	handler_error%		,&
			rc%			,&
			d0			,&
			d1			,&
			i%
	!======================================================================
	!	main
	!======================================================================
	main:									!
	print k_program +"_"+ k_version						!
	print string$(len(k_program +"_"+ k_version), asc("="))			! underline (how will this optimize?)
	gosub build_translation_strings						! initialize for hard way
	!
	junk1$ = "this is a test"						! test 1
	gosub translate_hard							!
	gosub translate_easy							!
	!
	junk1$ = "abcdefghijklmnopqrstuvwxyz0123456789"				! test 2
	gosub translate_hard							!
	gosub translate_easy							!
	!
	junk1$ = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"				! test 3
	gosub translate_hard							!
	gosub translate_easy							!
	!
	junk1$ = ""								! test 4
	for i% = 32 to 126							! use all viewable ascii characters
	    junk1$ = junk1$ + chr$(i%)						!
	next i%									!
	print "-i- NOTE: ignore the error relating to pos #65 (because ` <> ')"	!
	gosub translate_hard							!
	!
	goto fini								!
	!
	!=======================================================================
	!	ascii -> ebcic -> ascii
	!
	!	entry: junk1$ = data to convert
	!=======================================================================
	!
	!	translate easy (vms system calls)
	!
	translate_easy:								!
	print "-i-easyway"							!
	!
	!	unlike other lib$ functions, this one returns sys$_normal rather than lib$_normal
	!
	rc% = lib$tra_asc_ebc(junk1$,junk2$)					! ascii to ebcdic
!~~~	if rc% <> lib$_normal then						x
	if (rc% and 7%) <> 1% then						!
	    print "-e-lib$tra_asc_ebc rc: "+ str$(rc%)				!
	end if									!
	!
	!	unlike other lib$ functions, this one returns sys$_normal rather than lib$_normal
	!
	rc% = lib$tra_ebc_asc(junk2$,junk3$)					! ebcdic to ascii
!~~~	if rc% <> lib$_normal then						x
	if (rc% and 7%) <> 1% then						!
	    print "-e-lib$tra_ebc_asc rc: "+ str$(rc%)				!
	end if									!
	goto compare_data							!
	!
	!	translate hard (BASIC only)
	!
	translate_hard:								!
	print "-i-hardway"							!
	junk2$ = xlate$( junk1$, a_to_e$)					! convert to ebcdic
	junk3$ = xlate$( junk2$, e_to_a$)					! convert to ascii
	goto compare_data							!
	!
	!	compare data strings
	!
	compare_data:								!
	print "ascii src: ";junk1$						! original data
	print "ebcdic   : ";junk2$						!
	print "ascii    : ";junk3$						!
	if junk1$ <> junk3$ then						!
	    print "ruler    : 000000000111111111122222222223333333333444444444455555555556666666666777777"
	    print "ruler    : 123456789012345678901234567890123456789012345678901234567890123456789012345"
	    print "-e- error, ascii strings don't match at position(s):";	!
	    for i% = 1 to len(junk1$)						!
		print " ";str$(i%);	if mid$(junk1$,i%,1) <> mid$(junk3$,i%,1)
	    next i%								!
	    print								!
	else									!
	    print "-i- pass, ascii strings match"				!
	end if									!
	print "##################################################"		!
	return									!
	!
	!=======================================================================
	!	build translation strings (prep to use BASIC's xlate$ function)
	!=======================================================================
	build_translation_strings:
	!
	!	build translation string "a-to-e" (ascii to ebcdic)
	!
	handler_error%	= 0
	for i% = 0 to 255
	    read junk$								! read hex string data
	    when error in
		cause error 155 if len(junk$)<>4
		d0 = pos(k_hex_string, mid$(junk$,4,1),1)-1			! digit 0
		d1 = pos(k_hex_string, mid$(junk$,3,1),1)-1			! digit 1
		a_to_e$ = a_to_e$ + chr$( d1 * 16 + d0)				! build string
	    use									!
		handler_error% = err						!
	    end when								!
	    if handler_error% <> 0 then						!
		print "-e- fatal error "+str$(handler_error%)+ " during a-to-e init"
		print "    i: ";str$(i%);" data: ";junk$			!
		goto fini							!
	    end if								!
	next i%									!
	!
	!	build translation string "e-to-a" (ebcdic to ascii)
	!
	for i% = 0 to 255
	    read junk$								! read hex string data
	    when error in
		d0 = pos(k_hex_string, mid$(junk$,4,1),1)-1			! digit 0
		d1 = pos(k_hex_string, mid$(junk$,3,1),1)-1			! digit 1
		e_to_a$ = e_to_a$ + chr$( d1 * 16 + d0)				! build string
		handler_error% = 0						! all is well
	    use									!
		handler_error% = err						! oops
	    end when								!
	    if handler_error% <> 0 then						!
		print "-e- fatal error "+str$(handler_error%)+ " during e-to-a init"
		print "    i: "; str$(i%); " data: "; junk$			!
		goto fini							!
	    end if								!
	next i%									!
	!
	return									!
	!
	!====================================================================================================
	!	note: These tables are pasted from my "c" program. To improve program efficiency, they
	!	should be convert to numeric constants.
	!====================================================================================================
	!
	!	ASCII_to_EBCDIC data
	!
	data	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,	&
		0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,	&
		0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61,	&
		0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F,	&
		0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,	&
		0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D,	&
		0x7D, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,	&
 		0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xC0, 0x6A, 0xD0, 0xA1, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
		0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,	&
	!													&
	!	EBCDIC_to_ASCII data										&
	!													&
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,	&
		0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,	&
		0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,	&
		0x2E, 0x2E, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x2E, 0x3F,	&
		0x20, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,	&
		0x26, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E,	&
		0x2D, 0x2F, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x7C, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,	&
		0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,	&
		0x2E, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,	&
		0x2E, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,	&
		0x2E, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x2E, 0x2E, 0x2E, 0x5B, 0x2E, 0x2E,	&
		0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x5D, 0x2E, 0x2E,	&
		0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,	&
		0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,	&
		0x5C, 0x2E, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,	&
		0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E
	!
	!========================================================================================================
	!
	fini:
	end