def ml_parse_value(gmls, default=None):
""" Parse a value in a macro-language string. """
c = util.skip(gmls, ml_whitepace)
sgn = -1 if c == '-' else 1
if not c:
raise error.RunError(error.IFC)
if c in ('+', '-'):
gmls.read(1)
c = util.peek(gmls)
# don't allow default if sign is given
default = None
if c == '=':
gmls.read(1)
c = util.peek(gmls)
if len(c) == 0:
raise error.RunError(error.IFC)
elif ord(c) > 8:
name = util.get_var_name(gmls)
indices = ml_parse_indices(gmls)
step = var.get_var_or_array(name, indices)
util.require_read(gmls, (';',), err=error.IFC)
else:
# varptr$
step = get_value_for_varptrstr(gmls.read(3))
elif c in representation.ascii_digits:
step = ml_parse_const(gmls)
elif default is not None:
step = default
else:
raise error.RunError(error.IFC)
if sgn == -1:
step = vartypes.number_neg(step)
return step
def ml_parse_value(gmls, default=None):
""" Parse a value in a macro-language string. """
c = util.skip(gmls, ml_whitepace)
sgn = -1 if c == '-' else 1
if c in ('+', '-'):
gmls.read(1)
c = util.peek(gmls)
# don't allow default if sign is given
default = None
if c == '=':
gmls.read(1)
c = util.peek(gmls)
if len(c) == 0:
raise error.RunError(error.IFC)
elif ord(c) > 8:
name = util.get_var_name(gmls)
indices = ml_parse_indices(gmls)
step = var.get_var_or_array(name, indices)
util.require_read(gmls, (';',), err=error.IFC)
else:
# varptr$
step = get_value_for_varptrstr(gmls.read(3))
elif c and c in string.digits:
step = ml_parse_const(gmls)
elif default is not None:
step = default
else:
raise error.RunError(error.IFC)
if sgn == -1:
step = vartypes.number_neg(step)
return step
def value_operator(op, left, right):
""" Get value of binary operator expression. """
if op == tk.O_CARET:
return vcaret(left, right)
elif op == tk.O_TIMES:
return vtimes(left, right)
elif op == tk.O_DIV:
return vdiv(left, right)
elif op == tk.O_INTDIV:
return fp.pack(
fp.div(
fp.unpack(vartypes.pass_single_keep(left)).ifloor(),
fp.unpack(vartypes.pass_single_keep(
right)).ifloor()).apply_carry().ifloor())
elif op == tk.MOD:
numerator = vartypes.pass_int_unpack(right)
if numerator == 0:
# simulate division by zero
return fp.pack(
fp.div(
fp.unpack(vartypes.pass_single_keep(left)).ifloor(),
fp.unpack(
vartypes.pass_single_keep(right)).ifloor()).ifloor())
return vartypes.pack_int(vartypes.pass_int_unpack(left) % numerator)
elif op == tk.O_PLUS:
return vplus(left, right)
elif op == tk.O_MINUS:
return vartypes.number_add(left, vartypes.number_neg(right))
elif op == tk.O_GT:
return vartypes.bool_to_int_keep(vartypes.gt(left, right))
elif op == tk.O_EQ:
return vartypes.bool_to_int_keep(vartypes.equals(left, right))
elif op == tk.O_LT:
return vartypes.bool_to_int_keep(not (
vartypes.gt(left, right) or vartypes.equals(left, right)))
elif op == tk.O_GT + tk.O_EQ:
return vartypes.bool_to_int_keep(
vartypes.gt(left, right) or vartypes.equals(left, right))
elif op == tk.O_LT + tk.O_EQ:
return vartypes.bool_to_int_keep(not vartypes.gt(left, right))
elif op == tk.O_LT + tk.O_GT:
return vartypes.bool_to_int_keep(not vartypes.equals(left, right))
elif op == tk.AND:
return vartypes.twoscomp_to_int(
vartypes.pass_twoscomp(left) & vartypes.pass_twoscomp(right))
elif op == tk.OR:
return vartypes.twoscomp_to_int(
vartypes.pass_twoscomp(left) | vartypes.pass_twoscomp(right))
elif op == tk.XOR:
return vartypes.twoscomp_to_int(
vartypes.pass_twoscomp(left) ^ vartypes.pass_twoscomp(right))
elif op == tk.EQV:
return vartypes.twoscomp_to_int(~(vartypes.pass_twoscomp(left)
^ vartypes.pass_twoscomp(right)))
elif op == tk.IMP:
return vartypes.twoscomp_to_int((~vartypes.pass_twoscomp(left))
| vartypes.pass_twoscomp(right))
else:
raise error.RunError(error.STX)
def loop_init(ins, forpos, nextpos, varname, start, stop, step):
""" Initialise a FOR loop. """
# set start to start-step, then iterate - slower on init but allows for faster iterate
var.set_var(varname, vartypes.number_add(start, vartypes.number_neg(step)))
# NOTE: all access to varname must be in-place into the bytearray - no assignments!
sgn = vartypes.unpack_int(vartypes.number_sgn(step))
state.basic_state.for_next_stack.append((forpos, nextpos, varname[-1], state.basic_state.variables[varname], number_unpack(stop), number_unpack(step), sgn))
ins.seek(nextpos)
def value_operator(op, left, right):
""" Get value of binary operator expression. """
if op == tk.O_CARET:
return vcaret(left, right)
elif op == tk.O_TIMES:
return vtimes(left, right)
elif op == tk.O_DIV:
return vdiv(left, right)
elif op == tk.O_INTDIV:
return fp.pack(fp.div(fp.unpack(vartypes.pass_single_keep(left)).ifloor(),
fp.unpack(vartypes.pass_single_keep(right)).ifloor()).apply_carry().ifloor())
elif op == tk.MOD:
numerator = vartypes.pass_int_unpack(right)
if numerator == 0:
# simulate division by zero
return fp.pack(fp.div(fp.unpack(vartypes.pass_single_keep(left)).ifloor(),
fp.unpack(vartypes.pass_single_keep(right)).ifloor()).ifloor())
return vartypes.pack_int(vartypes.pass_int_unpack(left) % numerator)
elif op == tk.O_PLUS:
return vplus(left, right)
elif op == tk.O_MINUS:
return vartypes.number_add(left, vartypes.number_neg(right))
elif op == tk.O_GT:
return vartypes.bool_to_int_keep(vartypes.gt(left,right))
elif op == tk.O_EQ:
return vartypes.bool_to_int_keep(vartypes.equals(left, right))
elif op == tk.O_LT:
return vartypes.bool_to_int_keep(not(vartypes.gt(left,right) or vartypes.equals(left, right)))
elif op == tk.O_GT + tk.O_EQ:
return vartypes.bool_to_int_keep(vartypes.gt(left,right) or vartypes.equals(left, right))
elif op == tk.O_LT + tk.O_EQ:
return vartypes.bool_to_int_keep(not vartypes.gt(left,right))
elif op == tk.O_LT + tk.O_GT:
return vartypes.bool_to_int_keep(not vartypes.equals(left, right))
elif op == tk.AND:
return vartypes.twoscomp_to_int( vartypes.pass_twoscomp(left) & vartypes.pass_twoscomp(right) )
elif op == tk.OR:
return vartypes.twoscomp_to_int( vartypes.pass_twoscomp(left) | vartypes.pass_twoscomp(right) )
elif op == tk.XOR:
return vartypes.twoscomp_to_int( vartypes.pass_twoscomp(left) ^ vartypes.pass_twoscomp(right) )
elif op == tk.EQV:
return vartypes.twoscomp_to_int( ~(vartypes.pass_twoscomp(left) ^ vartypes.pass_twoscomp(right)) )
elif op == tk.IMP:
return vartypes.twoscomp_to_int( (~vartypes.pass_twoscomp(left)) | vartypes.pass_twoscomp(right) )
else:
raise error.RunError(error.STX)
def value_neg(ins):
""" -: get negative value. """
return vartypes.number_neg(vartypes.pass_number_keep(parse_expr_unit(ins)))
def value_neg(ins):
""" -: get negative value. """
return vartypes.number_neg(vartypes.pass_number_keep(parse_expr_unit(ins)))
