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Overview
Comment:Support .asciz and fix unit test breakage in scanner
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Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256:f23325b630014e86991313393783d6f49ef2b3e25ed83d2c64e42779f008550a
User & Date: kc5tja 2019-09-05 03:10:06
Context
2019-09-05
03:41
.skip and .zero support check-in: 447c21378e user: kc5tja tags: trunk
03:10
Support .asciz and fix unit test breakage in scanner check-in: f23325b630 user: kc5tja tags: trunk
02:51
.ascii support check-in: 29d317a6a2 user: kc5tja tags: trunk
Changes
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Changes to dev/src/bcpl/assemrv/parser.b. 

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LET parse(s, d, errp) BE {
	LET sym = scanner_sym(s)

	// Don't even try unless a chain of errors can be constructed.
	UNLESS errp DO RETURN

	IF sym = scs_dword DO scanner_next(s) <> const(s, d, errp, IR_DWORD) <> RETURN
	IF sym = scs_word DO scanner_next(s) <> const(s, d, errp, IR_WORD) <> RETURN
	IF sym = scs_half DO scanner_next(s) <> const(s, d, errp, IR_HALF) <> RETURN
	IF sym = scs_byte DO scanner_next(s) <> const(s, d, errp, IR_BYTE) <> RETURN
	IF sym = scs_8byte DO scanner_next(s) <> const(s, d, errp, IR_8BYTE) <> RETURN
	IF sym = scs_4byte DO scanner_next(s) <> const(s, d, errp, IR_4BYTE) <> RETURN
	IF sym = scs_2byte DO scanner_next(s) <> const(s, d, errp, IR_2BYTE) <> RETURN


	error(errp, s, err_syntax_error)
}

AND error(errp, scanner, errcode) BE {
	LET errdesc = getvec(ed_sizeof)
	IF errdesc DO {
................................................................................
		errdesc!ed_code := errcode

		errdesc!ed_next := !errp
		!errp := errdesc
	}
}

AND const(s, d, errp, order) BE {
	LET expr = VEC expr_sizeof

	zerovec(expr, expr_sizeof)

	const_part(s, d, errp, expr, order)
	IF !errp DO RETURN
	WHILE scanner_sym(s) = ',' DO {
		scanner_next(s)
		const_part(s, d, errp, expr, order)
		IF !errp DO RETURN
	}
}

AND const_part(s, d, errp, expr, order) BE {
	expression(s, d, errp, expr)
	IF !errp DO RETURN

	IF expr!expr_type = et_integer DO {
		dynvec_put_at(d, IR_LIT, d!dv_length)
		dynvec_put_at(d, expr!expr_value, d!dv_length)
		dynvec_put_at(d, order, d!dv_length)
		RETURN
	}

	IF expr!expr_type = et_string DO {

		LET s = @expr!expr_string

		FOR i = 1 TO s%0 DO {
			dynvec_put_at(d, IR_LIT, d!dv_length)
			dynvec_put_at(d, s%i, d!dv_length)
			dynvec_put_at(d, order, d!dv_length)

		}
		RETURN
	}


	error(errp, s, err_int_str_expr_expected) <> RETURN





}

AND expression(s, d, errp, expr) BE {
	LET sym = scanner_sym(s)

	IF sym = scs_integer DO {
		expr!expr_type := et_integer







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LET parse(s, d, errp) BE {
	LET sym = scanner_sym(s)

	// Don't even try unless a chain of errors can be constructed.
	UNLESS errp DO RETURN

	IF sym = scs_dword DO scanner_next(s) <> const(s, d, errp, IR_DWORD, FALSE) <> RETURN
	IF sym = scs_word DO scanner_next(s) <> const(s, d, errp, IR_WORD, FALSE) <> RETURN
	IF sym = scs_half DO scanner_next(s) <> const(s, d, errp, IR_HALF, FALSE) <> RETURN
	IF sym = scs_byte DO scanner_next(s) <> const(s, d, errp, IR_BYTE, FALSE) <> RETURN
	IF sym = scs_8byte DO scanner_next(s) <> const(s, d, errp, IR_8BYTE, FALSE) <> RETURN
	IF sym = scs_4byte DO scanner_next(s) <> const(s, d, errp, IR_4BYTE, FALSE) <> RETURN
	IF sym = scs_2byte DO scanner_next(s) <> const(s, d, errp, IR_2BYTE, FALSE) <> RETURN
	IF sym = scs_asciz DO scanner_next(s) <> const(s, d, errp, IR_BYTE, TRUE) <> RETURN

	error(errp, s, err_syntax_error)
}

AND error(errp, scanner, errcode) BE {
	LET errdesc = getvec(ed_sizeof)
	IF errdesc DO {
................................................................................
		errdesc!ed_code := errcode

		errdesc!ed_next := !errp
		!errp := errdesc
	}
}

AND const(s, d, errp, order, null_after_strings) BE {
	LET expr = VEC expr_sizeof

	zerovec(expr, expr_sizeof)

	const_part(s, d, errp, expr, order, null_after_strings)
	IF !errp DO RETURN
	WHILE scanner_sym(s) = ',' DO {
		scanner_next(s)
		const_part(s, d, errp, expr, order, null_after_strings)
		IF !errp DO RETURN
	}
}

AND const_part(s, d, errp, expr, order, null_after_strings) BE {
	expression(s, d, errp, expr)
	IF !errp DO RETURN

	TEST expr!expr_type = et_integer
	THEN append_order(d, order, expr!expr_value)





	ELSE TEST expr!expr_type = et_string
	THEN {
		LET s = @expr!expr_string

		FOR i = 1 TO s%0 DO append_order(d, order, s%i)



		IF null_after_strings DO append_order(d, order, 0)
	}


	ELSE error(errp, s, err_int_str_expr_expected)
}


AND append_order(d, order, v) BE {
	dynvec_put_at(d, IR_LIT, d!dv_length)
	dynvec_put_at(d, v, d!dv_length)
	dynvec_put_at(d, order, d!dv_length)
}

AND expression(s, d, errp, expr) BE {
	LET sym = scanner_sym(s)

	IF sym = scs_integer DO {
		expr!expr_type := et_integer

Changes to dev/src/bcpl/assemrv/test_parser.b. 

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GET "globals_dynvec"
GET "globals_scanner"
GET "globals_utils"
GET "globals_parser"


LET testlist() = VALOF {
	MANIFEST { ntests = 22 }
	LET tl = getvec(ntests)
	tl!0 := ntests
	tl!1 := test_dword
	tl!2 := test_dword_chain
	tl!3 := test_dword_string
	tl!4 := test_word
	tl!5 := test_word_chain
................................................................................
	tl!16 := test_4byte
	tl!17 := test_4byte_chain
	tl!18 := test_4byte_string
	tl!19 := test_2byte
	tl!20 := test_2byte_chain
	tl!21 := test_2byte_string
	tl!22 := test_ascii_string

	RESULTIS tl
}


// Parser Tests: Utilities

AND free_errors(p) BE {
................................................................................

	parse(s, d, @errlist)
	UNLESS EQ(errlist, 0, 5) DO GOTO unwind

	UNLESS EQ(d!dv_length, 21, 100) DO GOTO unwind
	FOR i = 0 TO 20 DO UNLESS EQ(dynvec_at(d, i), expected!i, 200+i) DO GOTO unwind





























































	err := 0

unwind:
	IF errlist DO free_errors(errlist)
	IF d DO dynvec_free(d)
	IF s DO scanner_free(s)
	IF scb DO endstream(scb)
	RESULTIS err
}









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GET "globals_dynvec"
GET "globals_scanner"
GET "globals_utils"
GET "globals_parser"


LET testlist() = VALOF {
	MANIFEST { ntests = 23 }
	LET tl = getvec(ntests)
	tl!0 := ntests
	tl!1 := test_dword
	tl!2 := test_dword_chain
	tl!3 := test_dword_string
	tl!4 := test_word
	tl!5 := test_word_chain
................................................................................
	tl!16 := test_4byte
	tl!17 := test_4byte_chain
	tl!18 := test_4byte_string
	tl!19 := test_2byte
	tl!20 := test_2byte_chain
	tl!21 := test_2byte_string
	tl!22 := test_ascii_string
	tl!23 := test_asciz_string
	RESULTIS tl
}


// Parser Tests: Utilities

AND free_errors(p) BE {
................................................................................

	parse(s, d, @errlist)
	UNLESS EQ(errlist, 0, 5) DO GOTO unwind

	UNLESS EQ(d!dv_length, 21, 100) DO GOTO unwind
	FOR i = 0 TO 20 DO UNLESS EQ(dynvec_at(d, i), expected!i, 200+i) DO GOTO unwind

	err := 0

unwind:
	IF errlist DO free_errors(errlist)
	IF d DO dynvec_free(d)
	IF s DO scanner_free(s)
	IF scb DO endstream(scb)
	RESULTIS err
}

AND test_asciz_string(r) = VALOF {
	LET err = failat
	LET scb, s, d = 0, 0, 0
	LET expected = TABLE IR_LIT, 6, IR_BYTE,
	                     IR_LIT, 'A', IR_BYTE,
	                     IR_LIT, 'b', IR_BYTE,
	                     IR_LIT, 'a', IR_BYTE,
	                     IR_LIT, 'c', IR_BYTE,
	                     IR_LIT, 'a', IR_BYTE,
	                     IR_LIT, 'b', IR_BYTE,
	                     IR_LIT, 0, IR_BYTE,
	                     IR_LIT, 'N', IR_BYTE,
	                     IR_LIT, 'a', IR_BYTE,
	                     IR_LIT, 'm', IR_BYTE,
	                     IR_LIT, 'i', IR_BYTE,
	                     IR_LIT, 'n', IR_BYTE,
	                     IR_LIT, 'a', IR_BYTE,
	                     IR_LIT, 'n', IR_BYTE,
	                     IR_LIT, 'u', IR_BYTE,
	                     IR_LIT, 0, IR_BYTE
	LET errlist = 0

	IF r DO RESULTIS r
	testid := "test_ascii_string"

	scb := findinoutput("RAM:")
	UNLESS NEQ(scb, 0, 0) DO GOTO unwind
	{
		LET outs = output()
		selectoutput(scb)
		writef(".asciz 6, *"Abacab*", *"Naminanu*"*n")
		selectoutput(outs)
		rewindstream(scb)
	}

	s := make_scanner()
	UNLESS NEQ(s, 0, 1) DO GOTO unwind
	UNLESS EQ(scanner_get_stream(s, scb, "RAM:"), TRUE, 3) DO GOTO unwind
	scanner_nextchar(s)
	scanner_next(s)

	d := make_dynvec()
	UNLESS NEQ(d, 0, 4) DO GOTO unwind

	parse(s, d, @errlist)
	UNLESS EQ(errlist, 0, 5) DO GOTO unwind

	UNLESS EQ(d!dv_length, 51, 100) DO GOTO unwind
	FOR i = 0 TO 50 DO UNLESS EQ(dynvec_at(d, i), expected!i, 200+i) DO GOTO unwind

	err := 0

unwind:
	IF errlist DO free_errors(errlist)
	IF d DO dynvec_free(d)
	IF s DO scanner_free(s)
	IF scb DO endstream(scb)
	RESULTIS err
}

Changes to dev/src/bcpl/assemrv/test_scanner.b. 

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	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_byte,    100) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_2byte,   101) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_4byte,   102) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_8byte,   103) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_half,    104) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_word,    105) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_dword,   106) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_ascii,   107) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_asciz,   108) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_asciz,   109) DO GOTO unwind	// .string synonym to .asciz
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_zero,    110) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_p2align, 111) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_balign,  112) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_equ,     113) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_equ,     114) DO GOTO unwind	// .set synonym to .equ








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	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_byte,    100) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_2byte,   101) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_4byte,   102) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_8byte,   103) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_half,    104) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_word,    105) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_dword,   106) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_byte,    107) DO GOTO unwind	// .ascii synonym to .byte
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_asciz,   108) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_asciz,   109) DO GOTO unwind	// .string synonym to .asciz
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_zero,    110) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_p2align, 111) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_balign,  112) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_equ,     113) DO GOTO unwind
	scanner_next(s); UNLESS EQ(scanner_sym(s), scs_equ,     114) DO GOTO unwind	// .set synonym to .equ

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