diff options
Diffstat (limited to 'chessboard-cursor.mu')
| -rw-r--r-- | chessboard-cursor.mu | 116 |
1 files changed, 61 insertions, 55 deletions
diff --git a/chessboard-cursor.mu b/chessboard-cursor.mu index 767354a6..22c543df 100644 --- a/chessboard-cursor.mu +++ b/chessboard-cursor.mu @@ -96,6 +96,7 @@ (address move-address (move)) +; todo: assumes stdout is always at raw address 2 (function print [ (default-space:space-address <- new space:literal 30:literal) { begin @@ -111,12 +112,36 @@ (function read-move [ (default-space:space-address <- new space:literal 30:literal) + (from-file:integer <- read-file) + { begin + (break-if from-file:integer) + (reply nil:literal) + } + (from-rank:integer <- read-rank) + (expect-stdin ((#\- literal))) + (to-file:integer <- read-file) + (to-rank:integer <- read-rank) + ; construct the move object + (result:move-address <- new move:literal) + (f:integer-integer-pair-address <- get-address result:move-address/deref from:offset) + (dest:integer-address <- get-address f:integer-integer-pair-address/deref 0:offset) + (dest:integer-address/deref <- copy from-file:integer) + (dest:integer-address <- get-address f:integer-integer-pair-address/deref 1:offset) + (dest:integer-address/deref <- copy from-rank:integer) + (t0:integer-integer-pair-address <- get-address result:move-address/deref to:offset) + (dest:integer-address <- get-address t0:integer-integer-pair-address/deref 0:offset) + (dest:integer-address/deref <- copy to-file:integer) + (dest:integer-address <- get-address t0:integer-integer-pair-address/deref 1:offset) + (dest:integer-address/deref <- copy to-rank:integer) + (reply result:move-address) +]) + +; todo: assumes stdin is always at raw address 1 +(function read-file [ + (default-space:space-address <- new space:literal 30:literal) + (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) (a:character <- copy ((#\a literal))) (file-base:integer <- character-to-integer a:character) - (one:character <- copy ((#\1 literal))) - (rank-base:integer <- character-to-integer one:character) - ; get from-file - (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) (c:character <- maybe-coerce x:tagged-value character:literal) (print c:character) { begin @@ -124,65 +149,46 @@ (break-unless quit:boolean) (reply nil:literal) } - (from-file:integer <- character-to-integer c:character) - (from-file:integer <- subtract from-file:integer file-base:integer) + (file:integer <- character-to-integer c:character) + (file:integer <- subtract file:integer file-base:integer) ; assert('a' <= from-file <= 'h') - (above-min:boolean <- greater-or-equal from-file:integer 0:literal) - (assert above-min:boolean (("from-file too low" literal))) - (below-max:boolean <- lesser-or-equal from-file:integer 7:literal) - (assert below-max:boolean (("from-file too high" literal))) - ; get from-rank + (above-min:boolean <- greater-or-equal file:integer 0:literal) + (assert above-min:boolean (("file too low" literal))) + (below-max:boolean <- lesser-or-equal file:integer 7:literal) + (assert below-max:boolean (("file too high" literal))) + (reply file:integer) +]) + +(function read-rank [ + (default-space:space-address <- new space:literal 30:literal) (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) (c:character <- maybe-coerce x:tagged-value character:literal) (print c:character) - (from-rank:integer <- character-to-integer c:character) - (from-rank:integer <- subtract from-rank:integer rank-base:integer) - ; assert('1' <= from-rank <= '8') - (above-min:boolean <- greater-or-equal from-rank:integer 0:literal) - (assert above-min:boolean (("from-rank too low" literal))) - (below-max:boolean <- lesser-or-equal from-rank:integer 7:literal) - (assert below-max:boolean (("from-rank too high" literal))) + { begin + (quit:boolean <- equal c:character ((#\q literal))) + (break-unless quit:boolean) + (reply nil:literal) + } + (rank:integer <- character-to-integer c:character) + (one:character <- copy ((#\1 literal))) + (rank-base:integer <- character-to-integer one:character) + (rank:integer <- subtract rank:integer rank-base:integer) + ; assert('1' <= rank <= '8') + (above-min:boolean <- greater-or-equal rank:integer 0:literal) + (assert above-min:boolean (("rank too low" literal))) + (below-max:boolean <- lesser-or-equal rank:integer 7:literal) + (assert below-max:boolean (("rank too high" literal))) +]) + +(function expect-stdin [ + (default-space:space-address <- new space:literal 30:literal) ; slurp hyphen (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) (c:character <- maybe-coerce x:tagged-value character:literal) (print c:character) - (hyphen?:boolean <- equal c:character ((#\- literal))) - (assert hyphen?:boolean (("expected hyphen" literal))) - ; get to-file - (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) - (c:character <- maybe-coerce x:tagged-value character:literal) - (print c:character) - (to-file:integer <- character-to-integer c:character) - (to-file:integer <- subtract to-file:integer file-base:integer) - ; assert('a' <= to-file <= 'h') - (above-min:boolean <- greater-or-equal to-file:integer 0:literal) - (assert above-min:boolean (("to-file too low" literal))) - (below-max:boolean <- lesser-or-equal to-file:integer 7:literal) - (assert below-max:boolean (("to-file too high" literal))) - ; get to-rank - (x:tagged-value 1:channel-address/raw/deref <- read 1:channel-address/raw) - (c:character <- maybe-coerce x:tagged-value character:literal) - (print c:character) - (to-rank:integer <- character-to-integer c:character) - (to-rank:integer <- subtract to-rank:integer rank-base:integer) - ; assert('1' <= to-rank <= '8') - (above-min:boolean <- greater-or-equal to-rank:integer 0:literal) - (assert above-min:boolean (("to-rank too low" literal))) - (below-max:boolean <- lesser-or-equal to-rank:integer 7:literal) - (assert below-max:boolean (("to-rank too high" literal))) - ; construct the move object - (result:move-address <- new move:literal) - (f:integer-integer-pair-address <- get-address result:move-address/deref from:offset) - (dest:integer-address <- get-address f:integer-integer-pair-address/deref 0:offset) - (dest:integer-address/deref <- copy from-file:integer) - (dest:integer-address <- get-address f:integer-integer-pair-address/deref 1:offset) - (dest:integer-address/deref <- copy from-rank:integer) - (t0:integer-integer-pair-address <- get-address result:move-address/deref to:offset) - (dest:integer-address <- get-address t0:integer-integer-pair-address/deref 0:offset) - (dest:integer-address/deref <- copy to-file:integer) - (dest:integer-address <- get-address t0:integer-integer-pair-address/deref 1:offset) - (dest:integer-address/deref <- copy to-rank:integer) - (reply result:move-address) + (expected:character <- next-input) + (match?:boolean <- equal c:character expected:character) + (assert match?:boolean (("expected character not found" literal))) ]) (function make-move [ |