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- """
- This program compiles SNUSP programs to assembly.
- Copyright (C) 2004 John Bauman
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 2
- of the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- """
- import fileinput
- #these can also be changed to "putchar" and "getchar",
- #those can work with files, but getchar requires newlines to be input
- putchar="_putch"
- getchar="_getche"
- #preamble
- print """
- EXTERN ExitProcess
- IMPORT ExitProcess kernel32.dll
- EXTERN %s
- EXTERN %s
- SEGMENT .data USE32
- array times 30000 dw 0
- SEGMENT .code USE32
- ..start
- mov EBX, array
- push DWORD 0
- jmp progstart
- """ % (putchar, getchar)
- program = []
- hasstart = 0
- progwidth = 0
- for line in fileinput.input():
- n = [c for c in line]
-
- if line.find("$") >= 0:
- hasstart = 1
- program.append(n)
- if progwidth < len(n):
- progwidth = len(n)
-
- progheight = len(program)
- for line in range(len(program)): #pad the lines out
- program[line] += " " * (progwidth - len(program[line]))
-
- if not hasstart:
- print "progstart:"
-
-
- proglocs = {}
- jnum = 0
- for y, line in enumerate(program):
- for x, char in enumerate(line):
- if char == "\\" or char == "/":
- proglocs[(x,y)] = jnum
- jnum += 1
-
- jumpnum = 0
- callnum = 0
- skipnum = 0
- def outputrowdata(y, row, myname, left, right, realx, realy):
- """Print out the code for a "row" of data."""
-
- global skipnum, callnum, jumpnum
- amskipping = amcalling = amjumping = 0
-
- for x, char in enumerate(row):
- skipinturn = 0
- callinturn = 0
- jumpinturn = 0
-
- xypos = (realx(x,y), realy(x,y)) #find out the REAL position
-
- #check each character
- if myname == "right" and char == "$":
- print "progstart:"
- if char == "+":
- print "inc DWORD [EBX]"
- if char == "-":
- print "dec DWORD [EBX]"
- if char == ">":
- print "add EBX, 4"
- if char == "<":
- print "sub EBX, 4"
- if char == ",":
- print "call %s" % (getchar)
- print "mov [EBX], EAX"
- print "cmp EAX, 3"
- print "JE NEAR endprogram"
- if char == ".":
- print "push DWORD [EBX]"
- print "call %s" % (putchar)
- print "pop EAX"
- if char == "\\":
- print "JMP NEAR %s_%i" % (right, proglocs[xypos])
- print "%s_%i:" % (myname, proglocs[xypos])
- if char == "/":
- print "JMP NEAR %s_%i" % (left, proglocs[xypos])
- print "%s_%i:" % (myname, proglocs[xypos])
- if char == "?":
- print "CMP DWORD [EBX], 0"
- print "JE jump_%i" % (jumpnum)
- jumpnum += 1
- jumpinturn = 1
- if char == "!":
- print "JMP skip_%i" % (skipnum)
- skipnum += 1
- skipinturn = 1
- if char == "@":
- print "push call_%i" % (callnum)
- callnum += 1
- callinturn = 1
- if char == "#":
- print "cmp DWORD [ESP], 0"
- print "JE NEAR endprogram"
- print "ret"
- #jump-to points for the instructions that skip over others
- #these are annoyingly complicated, to account for the fact
- #that there might be two in a row
- if amjumping:
- print "jump_%i:" % (jumpnum - 1 - jumpinturn)
- amjumping -= 1
- if char == "?":
- amjumping += 1
- if amcalling:
- print "call_%i:" % (callnum - 1 - callinturn)
- amcalling -= 1
- if char == "@":
- amcalling += 1
- if amskipping:
- print "skip_%i:" % (skipnum - 1 - skipinturn)
- amskipping -= 1
- if char == "!":
- amskipping += 1
-
- #just make sure to clean up - no dangling references
- if amjumping:
- print "jump_%i:" % (jumpnum - 1)
- if amcalling:
- print "call_%i:" % (callnum - 1)
- if amskipping:
- print "skip_%i:" % (skipnum - 1)
-
- print "JMP endprogram"
- #these parts output the rows of code, forwards and backwards, up and down
- for y, row in enumerate(program):
- if "/" in row or "\\" in row or "$" in row or (y == 0 and not hasstart):
- outputrowdata(y, row, "right", "up", "down",
- lambda a,b:a,
- lambda a,b:b)
- for y, row in enumerate(program):
- row = row[:]
- row.reverse()
- if "/" in row or "\\" in row:
- outputrowdata(y, row, "left", "down", "up",
- lambda a,b:progwidth - a - 1,
- lambda a,b:b)
-
- for x, row in enumerate(zip(*program)):
- if "/" in row or "\\" in row:
- outputrowdata(x, row, "down", "left", "right",
- lambda a,b:b,
- lambda a,b:a)
-
- for x, row in enumerate(zip(*program)):
- row = list(row)
- row.reverse()
- if "/" in row or "\\" in row:
- outputrowdata(x, row, "up", "right", "left",
- lambda a,b:b,
- lambda a,b:progheight - a - 1)
-
- print "endprogram:"
- print "push DWORD 0"
- print "call [ExitProcess]"
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