6502/PLASMA
1
0
Fork 0
mirror of https://github.com/dschmenk/PLASMA.git synced 2024-09-07 12:54:31 +00:00
Code Issues Projects Releases Wiki Activity

Work out NIL eval

Browse Source
This commit is contained in:
David Schmenk 2024-07-13 17:24:19 -07:00
parent 5e7dc428e5
commit 77dd8d0d0b
1 changed files with 59 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
src/lisp/s-expr.pla
View File

@ -36,6 +36,7 @@ end
struc t_array
res[t_elem]
word dimension[4]
word offset[4]
word arraymem
end
struc t_numint
@ -50,8 +51,8 @@ end
predef eval_expr(expr)
var sym_quote, sym_lambda, sym_cond, sym_set
res[t_elem] pred_true = 0, 0, BOOL_TRUE
res[t_elem] pred_nil = 0, 0, NIL
res[t_elem] pred_true = 0, 0, BOOL_TRUE
res[t_elem] pred_nil = 0, 0, NIL
var cons_list = NULL
var cons_free = NULL
@ -240,16 +241,25 @@ export def new_float(extptr)#1
end
def new_array(dim0, dim1, dim2, dim3)
var ofst0, ofst1, ofst2, ofst3
var size, aptr, memptr
size = dim0 * 2
if dim1; size = size * dim1; fin
if dim2; size = size * dim2; fin
if dim3; size = size * dim3; fin
if not size
puts("Zero sized array!\n")
return NULL
if dim3
ofst3 = 2
ofst2 = dim3 * 2
ofst1 = ofst2 * dim2
ofst0 = ofst1 * dim1
elsif dim2
ofst2 = 2
ofst1 = dim2 * 2
ofst0 = ofst1 * dim1
elsif dim1
ofst1 = 2
ofst0 = dim1 * 2
else
ofst0 = 2
fin
size = dim0 * ofst0
memptr = heapalloc(size)
if not memptr
puts("Array too large!\n")
@ -263,6 +273,10 @@ def new_array(dim0, dim1, dim2, dim3)
aptr=>dimension[1] = dim1
aptr=>dimension[2] = dim2
aptr=>dimension[3] = dim3
aptr=>offset[0] = ofst0
aptr=>offset[1] = ofst1
aptr=>offset[2] = ofst2
aptr=>offset[3] = ofst3
aptr=>arraymem = memptr
return aptr
end
@ -372,7 +386,7 @@ end
def print_atom(atom)#0
char prstr[32]
var elemptr, d, i
var elemptr, i, j, k, l
if not atom
puts("NIL")
@ -399,16 +413,39 @@ def print_atom(atom)#0
break;
is ARRAY_TYPE
elemptr = atom=>arraymem
for d = 3 downto 0
if atom=>dimension[d]
puts("[ ")
for i = 1 to atom=>dimension[d]
print_atom(*elemptr); putc(' ')
elemptr = elemptr + 2
puts("[ ")
for i = 1 to atom=>dimension[0]
if atom=>dimension[1]
puts("\n[ ")
for j = 1 to atom=>dimension[1]
if atom=>dimension[2]
puts("\n[ ")
for k = 1 to atom=>dimension[2]
if atom=>dimension[3]
puts("\n[ ")
for l = 1 to atom=>dimension[3]
print_atom(*elemptr); putc(' ')
elemptr = elemptr + 2
next
puts("]")
else
print_atom(*elemptr); putc(' ')
elemptr = elemptr + 2
fin
next
puts("]")
else
print_atom(*elemptr); putc(' ')
elemptr = elemptr + 2
fin
next
puts("]\n")
puts("]")
else
print_atom(*elemptr); putc(' ')
elemptr = elemptr + 2
fin
next
puts("]\n")
break
otherwise
puts("Unkown atom type\n")
@ -700,6 +737,7 @@ export def eval_expr(expr)#1
if expr->type & TYPE_MASK == SYM_TYPE
if expr=>apval
expr = expr=>apval
if expr == @pred_nil; expr = NULL; fin
elsif expr=>array
expr = expr=>array
else
@ -801,13 +839,9 @@ def natv_define(symptr, expr)
end
def eval_index(arrayptr, expr)
var idx[4], ii, index
var idx[4], i, ii, index
idx[0] = 0
idx[1] = 0
idx[2] = 0
idx[3] = 0
ii = 0
ii = 0
while expr and ii < 4
index = eval_expr(expr=>car)
if index->type <> NUM_INT or isuge(index=>intval, arrayptr=>dimension[ii])
@ -821,9 +855,9 @@ def eval_index(arrayptr, expr)
index = 0
while ii
ii--
index = idx[ii] + index * arrayptr=>dimension[ii])
index = index + idx[ii] * arrayptr=>offset[ii]
loop
return arrayptr=>arraymem + index * 2
return arrayptr=>arraymem + index
end
def natv_index(symptr, expr)