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Moved platform-specific code into utils.console.py as functions

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This commit is contained in:
Sam Colwell 2018-11-07 22:48:17 -05:00
parent c2eb7897bc
commit a705252440
2 changed files with 67 additions and 26 deletions
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32
py65/monitor.py
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@ -467,25 +467,10 @@ class Monitor(cmd.Cmd):
mpu = self._mpu
mem = self._mpu.memory
if sys.platform[:3] != "win":
# For non-windows systems, switch to non-canonical
# and no-echo non-blocking-read mode.
import termios
# Save the current terminal setup.
fd = self.stdin.fileno()
self.oldattr = termios.tcgetattr(fd)
# Switch to noncanonical (instant) mode with no echo.
newattr = self.oldattr[:]
newattr[3] &= ~termios.ICANON & ~termios.ECHO
# Switch to non-blocking reads with 0.1 second timeout.
newattr[6][termios.VMIN] = 0
newattr[6][termios.VTIME] = 1
termios.tcsetattr(fd, termios.TCSANOW, newattr)
# Switch to immediate (noncanonical) no-echo input mode on POSIX
# operating systems. This has no effect on Windows.
console.noncanonical_mode(self.stdin)
if not breakpoints:
while True:
mpu.step()
@ -502,13 +487,8 @@ class Monitor(cmd.Cmd):
self._output(msg % self._breakpoints.index(pc))
break
if sys.platform[:3] != "win":
# For non-windows systems, switch back to canonical/echo
# mode.
import termios
# Restore the old input settings.
fd = self.stdin.fileno()
termios.tcsetattr(fd, termios.TCSANOW, self.oldattr)
# Switch back to the previous input mode.
console.restore_mode(self.stdin)
def help_radix(self):

61
py65/utils/console.py
View File

@ -1,9 +1,20 @@
import sys
import time
if sys.platform[:3] == "win":
import msvcrt
def noncanonical_mode(stdin):
""" noncanonical_mode is a no-op on Windows. """
return
def restore_mode(stdin):
""" restore_mode is a no-op on Windows. """
return
def getch(stdin):
""" Read one character from the Windows console, blocking until one
is available. Does not echo the character. The stdin argument is
@ -30,14 +41,61 @@ else:
import termios
import fcntl
oldattr_stack = [ ]
def noncanonical_mode(stdin):
"""For operating systems that support it, switch to noncanonical
mode. In this mode, characters are given immediately to the
program and no processing of editing characters (like backspace)
is performed. Echo is also turned off in this mode. The
previous input behavior can be restored with
"""
# For non-windows systems, switch to non-canonical
# and no-echo non-blocking-read mode.
global oldattr_stack
# Save the current terminal setup.
fd = stdin.fileno()
oldattr = termios.tcgetattr(fd)
oldattr_stack.append(oldattr)
# Switch to noncanonical (instant) mode with no echo.
newattr = oldattr[:]
newattr[3] &= ~termios.ICANON & ~termios.ECHO
# Switch to non-blocking reads with 0.1 second timeout.
newattr[6][termios.VMIN] = 0
newattr[6][termios.VTIME] = 1
termios.tcsetattr(fd, termios.TCSANOW, newattr)
def restore_mode(stdin):
"""For operating systems that support it, restore the previous
input mode. In this mode, a line can be entered and edited
until Enter is pressed, and then the line is passed to the
program for processing.
"""
# Restore the previous input setup.
global oldattr_stack
fd = stdin.fileno()
# If there is a previous setting, restore it.
if oldattr_stack:
termios.tcsetattr(fd, termios.TCSANOW, oldattr_stack.pop())
def getch(stdin):
""" Read one character from stdin, blocking until one is available.
Does not echo the character.
"""
# Try to get a character with a non-blocking read.
char = ''
noncanonical_mode(stdin)
while char == '':
char = stdin.read(1)
restore_mode(stdin)
return char
def getch_noblock(stdin):
@ -45,8 +103,11 @@ else:
character. If no character is available, an empty string is returned.
"""
char = ''
# Using non-blocking read as set up in Monitor._run
noncanonical_mode(stdin)
char = stdin.read(1)
restore_mode(stdin)
if char == "\n":
char = "\r"