def auto_step(self):
""" Generate an AUTO line number and wait for input. """
numstr = str(state.basic_state.auto_linenum)
console.write(numstr)
if state.basic_state.auto_linenum in state.basic_state.line_numbers:
console.write('*')
line = bytearray(console.wait_screenline(from_start=True))
if line[:len(numstr)+1] == numstr+'*':
line[len(numstr)] = ' '
else:
console.write(' ')
line = bytearray(console.wait_screenline(from_start=True))
# run or store it; don't clear lines or raise undefined line number
state.basic_state.direct_line = tokenise.tokenise_line(line)
c = util.peek(state.basic_state.direct_line)
if c == '\0':
# check for lines starting with numbers (6553 6) and empty lines
empty, scanline = program.check_number_start(state.basic_state.direct_line)
if not empty:
program.store_line(state.basic_state.direct_line)
reset.clear()
state.basic_state.auto_linenum = scanline + state.basic_state.auto_increment
elif c != '':
# it is a command, go and execute
state.basic_state.parse_mode = True
def auto_step():
""" Generate an AUTO line number and wait for input. """
numstr = str(state.basic_state.auto_linenum)
console.write(numstr)
if state.basic_state.auto_linenum in state.basic_state.line_numbers:
console.write('*')
line = bytearray(console.wait_screenline(from_start=True))
if line[:len(numstr)+1] == numstr+'*':
line[len(numstr)] = ' '
else:
console.write(' ')
line = bytearray(console.wait_screenline(from_start=True))
# run or store it; don't clear lines or raise undefined line number
state.basic_state.direct_line = tokenise.tokenise_line(line)
c = util.peek(state.basic_state.direct_line)
if c == '\0':
# check for lines starting with numbers (6553 6) and empty lines
empty, scanline = program.check_number_start(state.basic_state.direct_line)
if not empty:
program.store_line(state.basic_state.direct_line)
reset.clear()
state.basic_state.auto_linenum = scanline + state.basic_state.auto_increment
elif c != '':
# it is a command, go and execute
state.basic_state.execute_mode = True
def run_once():
""" Read-eval-print loop: run once. """
try:
while True:
state.basic_state.last_mode = state.basic_state.execute_mode, state.basic_state.auto_mode
if state.basic_state.execute_mode:
try:
# may raise Break
backend.check_events()
handle_basic_events()
if not statements.parse_statement():
state.basic_state.execute_mode = False
except error.Break as e:
handle_break(e)
elif state.basic_state.auto_mode:
try:
# auto step, checks events
auto_step()
except error.Break:
state.basic_state.auto_mode = False
else:
show_prompt()
try:
# input loop, checks events
line = console.wait_screenline(from_start=True, alt_replace=True)
state.basic_state.prompt = not store_line(line)
except error.Break:
state.basic_state.prompt = False
continue
# change loop modes
if switch_mode():
break
except error.RunError as e:
handle_error(e)
state.basic_state.prompt = True
def loop(self):
""" Run read-eval-print loop until control returns to user after a command. """
try:
while True:
self.last_mode = state.basic_state.parse_mode, state.basic_state.auto_mode
if state.basic_state.parse_mode:
try:
# may raise Break
events.check_events()
self.handle_basic_events()
# returns True if more statements to parse
if not statements.parse_statement():
state.basic_state.parse_mode = False
except error.RunError as e:
self.trap_error(e)
except error.Break as e:
# ctrl-break stops foreground and background sound
state.console_state.sound.stop_all_sound()
self.handle_break(e)
elif state.basic_state.auto_mode:
try:
# auto step, checks events
self.auto_step()
except error.Break:
# ctrl+break, ctrl-c both stop background sound
state.console_state.sound.stop_all_sound()
state.basic_state.auto_mode = False
else:
self.show_prompt()
try:
# input loop, checks events
line = console.wait_screenline(from_start=True)
self.prompt = not self.store_line(line)
except error.Break:
state.console_state.sound.stop_all_sound()
self.prompt = False
continue
# change loop modes
if self.switch_mode():
break
except error.RunError as e:
self.handle_error(e)
self.prompt = True
except error.Exit:
raise
except error.Reset:
raise
except Exception as e:
if debug.debug_mode:
raise
debug.bluescreen(e)
def run_once():
""" Read-eval-print loop: run once. """
try:
while True:
state.basic_state.last_mode = state.basic_state.execute_mode, state.basic_state.auto_mode
if state.basic_state.execute_mode:
try:
# may raise Break
backend.check_events()
handle_basic_events()
# returns True if more statements to parse
if not statements.parse_statement():
state.basic_state.execute_mode = False
except error.RunError as e:
trap_error(e)
except error.Break as e:
# ctrl-break stops foreground and background sound
state.console_state.sound.stop_all_sound()
handle_break(e)
elif state.basic_state.auto_mode:
try:
# auto step, checks events
auto_step()
except error.Break:
# ctrl+break, ctrl-c both stop background sound
state.console_state.sound.stop_all_sound()
state.basic_state.auto_mode = False
else:
show_prompt()
try:
# input loop, checks events
line = console.wait_screenline(from_start=True)
state.basic_state.prompt = not store_line(line)
except error.Break:
state.console_state.sound.stop_all_sound()
state.basic_state.prompt = False
continue
# change loop modes
if switch_mode():
break
except error.RunError as e:
handle_error(e)
state.basic_state.prompt = True
except error.Exit:
raise
except Exception as e:
if debug.debug_mode:
raise
bluescreen(e)
def input_console(prompt, readvar, newline):
""" Read a list of variables for INPUT. """
# readvar is a list of (name, indices) tuples
# we return a list of (name, indices, values) tuples
while True:
console.write(prompt)
line = console.wait_screenline(write_endl=newline)
inputstream = InputTextFile(line)
# read the values and group them and the separators
values, seps = zip(*[inputstream.read_var(v) for v in readvar])
# last separator not empty: there were too many values or commas
# if there are Nones: there were too few or empty values
if (seps[-1] or None in values):
# good old Redo!
console.write_line('?Redo from start')
else:
return [r + [v] for r, v in zip(readvar, values)]
def input_console(prompt, readvar, newline):
""" Read a list of variables for INPUT. """
# readvar is a list of (name, indices) tuples
# we return a list of (name, indices, values) tuples
while True:
console.write(prompt)
line = console.wait_screenline(write_endl=newline)
inputstream = InputTextFile(line)
# read the values and group them and the separators
values, seps = zip(*[inputstream.read_var(v) for v in readvar])
# last separator not empty: there were too many values or commas
# if there are Nones: there were too few or empty values
if (seps[-1] or None in values):
# good old Redo!
console.write_line('?Redo from start')
else:
return [ r + [v] for r, v in zip(readvar, values) ]
def input_console(prompt, readvar, newline):
""" Read a list of variables for INPUT. """
# readvar is a list of (name, indices) tuples
# we return a list of (name, indices, values) tuples
while True:
console.write(prompt)
line = console.wait_screenline(write_endl=newline)
inputstream = InputTextFile(line)
# read the values and group them and the separators
values, seps = zip(*[inputstream.read_var(v) for v in readvar])
# last separator not empty: there were too many values or commas
# earlier separators empty: there were too few values
# empty values will be converted to zero by str_to_value_keep
# Nene means a conversion error occurred
if (seps[-1] or '' in seps[:-1] or None in values):
# good old Redo!
console.write_line('?Redo from start')
else:
return [r + [v] for r, v in zip(readvar, values)]
def input_console(prompt, readvar, newline):
""" Read a list of variables for INPUT. """
# readvar is a list of (name, indices) tuples
# we return a list of (name, indices, values) tuples
while True:
console.write(prompt)
line = console.wait_screenline(write_endl=newline)
inputstream = InputTextFile(line)
# read the values and group them and the separators
values, seps = zip(*[inputstream.read_var(v) for v in readvar])
# last separator not empty: there were too many values or commas
# earlier separators empty: there were too few values
# empty values will be converted to zero by string_to_number
# None means a conversion error occurred
if (seps[-1] or '' in seps[:-1] or None in values):
# good old Redo!
console.write_line('?Redo from start')
else:
return [r + [v] for r, v in zip(readvar, values)]
