lang-bootstrap/05/idents.b
2022-01-18 16:29:48 -05:00

51 lines
1 KiB
Brainfuck

; an "identifier list" is a list of identifiers and 64-bit values associated with them
; the values should be non-zero because 0 is returned for undefined identifiers.
function ident_list_create
argument nbytes
local list
list = malloc(nbytes)
*1list = 255
return list
function ident_list_add
argument list
argument ident
argument value
list = memchr(list, 255)
list = strcpy(list, ident)
list += 1
*8list = value ; UNALIGNED
list += 8
*1list = 255
return
; return the value associated with this identifier, or 0 if none is
function ident_list_lookup
argument list
argument ident
local b
:ilist_lookup_loop
if *1list == 255 goto return_0
b = str_equals(list, ident)
list = memchr(list, 0)
list += 1
if b == 0 goto ilist_lookup_loop
return *8list ; UNALIGNED
function ident_list_print
argument list
:ilist_print_loop
if *1list == 255 goto ilist_print_loop_end
puts(list)
putc(':)
putc(32)
list = memchr(list, 0)
list += 1
putn(*8list)
list += 8
goto ilist_print_loop
:ilist_print_loop_end
return