Interpreter for Clem, v1

clemint.py - gold

import sys,os,copy as C
L=len
S=[]
n=[S]
Q=lambda:S and S.pop()or 0
def P(o):
 if o:n[0].append(o)
def X():x=Q();P(x);P(C.deepcopy(x))
def W():S[-2::]=S[-1:-3:-1]
def R():a,b,c=Q(),Q(),Q();P(a);P(c);P(b)
def A(d):
 a=Q()
 if a and a[0]:a=[1,a[1]+d,lambda:P(a)]
 P(a)
def V():
 a=Q();P(a)
 if a and a[0]-1and L(a[2])>1:r=a[2].pop(0);P(r)
def T():
 b,a=Q(),Q()
 if a!=b:P([0,0,(a[2],[a])[a[0]]+(b[2],[b])[b[0]]])
 else:P(a);P(b)
def r():a=os.read(0,1);F(ord(a)if a else-1)
def q(f):
 a=Q()
 if a and a[0]:os.write(1,(chr(a[1]%256),str(a[1]))[f])
def e(f,x=0):f[2]()if f[0]+f[1]else([e(z)for z in f[2]]if x else P(f))
def w():
 a=Q()
 while a and S and S[-1][0]and S[-1][1]:e(a,1)
def Y():n[:0]=[[]]
def Z():
 x=n.pop(0)
 if x:n[0]+=([[0,0,x]],x)[L(x)+L(n)==2]
D={'%':Q,'#':X,'$':W,'@':R,'+':lambda:A(1),'-':lambda:A(-1),'/':V,'.':T,'<':r,'>':lambda:q(0),'c':lambda:q(1),'w':w,'(':Y,')':Z}
def g(c):D[c]()if L(n)<2or c in'()'else P([0,1,D[c]])
N=['']
def F(x):a=[1,x,lambda:P(a)];a[2]()
def E():
 if'-'==N[0]:g('-')
 elif N[0]:F(int(N[0]))
 N[0]=''
s=j=""
for c in open(sys.argv[1]).read()+' ':
 if j:j=c!="\n"
 elif'"'==c:E();s and map(F,map(ord,s[:0:-1]));s=(c,'')[L(s)>0]
 elif s:s+=c
 elif';'==c:E();j=1
 else:
	if'-'==c:E()
	if c in'-0123456789':N[0]+=c
	else:E();c in D and g(c)