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Fixing issues with swap command and character input #1

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Fixing issues with swap command and character input #1

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4384244
Fixed the swap command.
anthonykozar Nov 26, 2021
61f0b7d
Only use termios if stdin is a tty. This fixes an exception that occu…
anthonykozar Nov 27, 2021
dd641c7
Moved solution in last commit from getch.py to gaot_plus_plus.py.
anthonykozar Nov 27, 2021
7d510e7
Halt the program if the instruction pointer becomes negative.
anthonykozar Dec 5, 2021
22bef7e
Fixed the rotate command.
anthonykozar Dec 5, 2021
ad20eb1
Prevented an exception caused by rotating an empty stack.
anthonykozar Dec 8, 2021
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24 changes: 18 additions & 6 deletions gaot_plus_plus.py
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ def __init__(self):

def run(self, program):
self.instructions = program.split()
while self.ipointer < len(self.instructions):
while self.ipointer < len(self.instructions) and self.ipointer >= 0:
c = self.instructions[self.ipointer]

if self.BAA.search(c): # is a "baa" command
Expand Down Expand Up @@ -110,24 +110,36 @@ def _getnum(self):
self.stack.push(float(raw_input()))

def _getchar(self):
_ = ord(getch())
self.stack.append(_*(_!=4))
# check if stdin is connected to a terminal
if sys.stdin.isatty():
_ = ord(getch())
self.stack.append(_*(_!=4))
else:
# getch() doesn't work with non-terminals
ch = sys.stdin.read(1)
if ch == '':
self.stack.append(0)
else:
self.stack.append(ord(ch))

def _dupe(self):
self.stack.push(self.stack.peek())

def _swap(self):
x,y = self.stack.pop(), self.stack.pop()

self.stack.push(y)
self.stack.push(x)
self.stack.push(y)

def _reverse_stack(self):
self.stack = Stack(self.stack.get()[::-1])

def _rotate_stack(self):
_ = self.stack.get()
self.stack = Stack(x[1:]+x[0])
if len(self.stack) > 1:
x = self.stack[0]
self.stack = Stack(self.stack[1:])
self.stack.push(x)

def main():
gaot = Gaot()
gaot.run(gaot.get_code())
Expand Down