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gcode: Add minval/maxval/above/below options to get_X parsers

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Add value checking to gcode parameter parsing code.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-04-20 21:41:13 -04:00
parent 8f4f5da11c
commit d5dc6b785d
5 changed files with 53 additions and 45 deletions
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69
klippy/gcode.py
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@ -250,20 +250,38 @@ class GCodeParser:
self.respond('!! %s' % (lines[0].strip(),))
# Parameter parsing helpers
class sentinel: pass
def get_str(self, name, params, default=sentinel, parser=str):
if name in params:
try:
return parser(params[name])
except:
raise error("Error on '%s': unable to parse %s" % (
params['#original'], params[name]))
if default is not self.sentinel:
def get_str(self, name, params, default=sentinel, parser=str,
minval=None, maxval=None, above=None, below=None):
if name not in params:
if default is self.sentinel:
raise error("Error on '%s': missing %s" % (
params['#original'], name))
return default
raise error("Error on '%s': missing %s" % (params['#original'], name))
def get_int(self, name, params, default=sentinel):
return self.get_str(name, params, default, parser=int)
def get_float(self, name, params, default=sentinel):
return self.get_str(name, params, default, parser=float)
try:
value = parser(params[name])
except:
raise error("Error on '%s': unable to parse %s" % (
params['#original'], params[name]))
if minval is not None and value < minval:
raise self.error("Error on '%s': %s must have minimum of %s" % (
params['#original'], name, minval))
if maxval is not None and value > maxval:
raise self.error("Error on '%s': %s must have maximum of %s" % (
params['#original'], name, maxval))
if above is not None and value <= above:
raise self.error("Error on '%s': %s must be above %s" % (
params['#original'], name, above))
if below is not None and value >= below:
raise self.error("Error on '%s': %s must be below %s" % (
params['#original'], name, below))
return value
def get_int(self, name, params, default=sentinel, minval=None, maxval=None):
return self.get_str(name, params, default, parser=int,
minval=minval, maxval=maxval)
def get_float(self, name, params, default=sentinel,
minval=None, maxval=None, above=None, below=None):
return self.get_str(name, params, default, parser=float, minval=minval,
maxval=maxval, above=above, below=below)
extended_r = re.compile(
r'^\s*(?:N[0-9]+\s*)?'
r'(?P<cmd>[a-zA-Z_][a-zA-Z_]+)(?:\s+|$)'
@ -310,9 +328,9 @@ class GCodeParser:
if is_bed:
heater = self.heaters[-1]
elif 'T' in params:
heater_index = self.get_int('T', params)
if heater_index >= 0 and heater_index < len(self.heaters) - 1:
heater = self.heaters[heater_index]
index = self.get_int(
'T', params, minval=0, maxval=len(self.heaters)-2)
heater = self.heaters[index]
elif self.extruder is not None:
heater = self.extruder.get_heater()
if heater is None:
@ -349,11 +367,8 @@ class GCodeParser:
self.respond_info('Unknown command:"%s"' % (cmd,))
def cmd_Tn(self, params):
# Select Tool
index = self.get_int('T', params)
extruders = extruder.get_printer_extruders(self.printer)
if self.extruder is None or index < 0 or index >= len(extruders):
self.respond_error("Extruder %d not configured" % (index,))
return
index = self.get_int('T', params, minval=0, maxval=len(extruders)-1)
e = extruders[index]
if self.extruder is e:
return
@ -409,9 +424,9 @@ class GCodeParser:
def cmd_G4(self, params):
# Dwell
if 'S' in params:
delay = self.get_float('S', params)
delay = self.get_float('S', params, minval=0.)
else:
delay = self.get_float('P', params, 0.) / 1000.
delay = self.get_float('P', params, 0., minval=0.) / 1000.
self.toolhead.dwell(delay)
def cmd_G28(self, params):
# Move to origin
@ -472,15 +487,11 @@ class GCodeParser:
self.respond("X:%.3f Y:%.3f Z:%.3f E:%.3f" % tuple(p))
def cmd_M220(self, params):
# Set speed factor override percentage
value = self.get_float('S', params, 100.) / (60. * 100.)
if value <= 0.:
raise error("Invalid factor in '%s'" % (params['#original'],))
value = self.get_float('S', params, 100., above=0.) / (60. * 100.)
self.speed_factor = value
def cmd_M221(self, params):
# Set extrude factor override percentage
new_extrude_factor = self.get_float('S', params, 100.) / 100.
if new_extrude_factor <= 0.:
raise error("Invalid factor in '%s'" % (params['#original'],))
new_extrude_factor = self.get_float('S', params, 100., above=0.) / 100.
last_e_pos = self.last_position[3]
e_value = (last_e_pos - self.base_position[3]) / self.extrude_factor
self.base_position[3] = last_e_pos - e_value * new_extrude_factor
@ -523,7 +534,7 @@ class GCodeParser:
self.set_temp(params, is_bed=True, wait=True)
def cmd_M106(self, params):
# Set fan speed
self.set_fan_speed(self.get_float('S', params, 255.) / 255.)
self.set_fan_speed(self.get_float('S', params, 255., minval=0.) / 255.)
def cmd_M107(self, params):
# Turn fan off
self.set_fan_speed(0.)