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spl.py
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spl.py
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#!/usr/bin/python
#
# SPL compiler
# RTK, 03-Sep-2007
# Last update: 05-Aug-2015
#
# $Id$
#
# This code is freeware, do as you please with it.
#
##########################################################
import os
import sys
import math
import time
from types import *
# Modification date
LAST_MOD = "05-Aug-2015"
#-----------------------------------------------------------------------
# Configuration section. Modify these values to reflect
# your working environment and target system.
#-----------------------------------------------------------------------
# Assembler name and/or path. If the executable is in your
# $PATH just the name is needed. If on Windows, a good place
# to put the as6502.exe file is in the C:\WINDOWS\ directory in
# which case all you need is "as6502" here.
ASSEMBLER = "atasm"
# Library and include paths. If you have environment variables set
# for these, they will be used. If you do not set environment variables
# the default value will be used. Therefore, set the default value to
# the full pathname, trailing / or \ included, to the place where you
# set up the directories, if not using environment variables.
LIB_DIR = os.getenv("SPL_LIB_PATH", default="lib/")
INCLUDE_DIR = os.getenv("SPL_INCLUDE_PATH", default="include/")
# Pathname of blank ProDOS disk image
DISK_IMAGE = LIB_DIR + "blank.dsk"
# Default base output file name and type
BASE_NAME = "out"
BASE_TYPE = "bin"
# Compiler version number
VERSION = "1.1atari"
# Header for assembly output files, must be a list of strings
HEADER = [
"",
"Output from SPL compiler version " + VERSION,
"Generated on " + time.ctime(time.time()),
""
]
# Code start and stack location in RAM
ORG = 0x2400
# Start of variable space, grows downwards
VARTOP= 0x8000 # doesn't clobber the ProDOS BASIC interpreter
# Library equates - case matters
EQUATES = {
"stack" : ORG-512, # stack address
"sp" : 0x80, # stack pointer
"ex" : 0x81, # xreg value
"ey" : 0x82, # yreg value
"ea" : 0x83, # areg value
"ta" : 0x84, # and 7, scratch 1
"tb" : 0x86, # and 9, scratch 2
"op1" : 0x87, # 1st operand (4 bytes)
"op2" : 0x8B, # 2nd operand (4 bytes)
"res" : 0x8F, # result (8 bytes)
"rem" : 0x96, # remainder (4 bytes)
"tmp" : 0x9A, # scratch (4 bytes)
"sign" : 0x9F, # sign (1 byte)
"outbuf" : 0xA0, # output text buffer (12 bytes)
"areg" : 0xB0, # A register (2 byte)
"breg" : 0xB2, # B register (2 byte)
"xreg" : 0xB4, # X register (2 byte)
"yreg" : 0xB6, # Y register (2 byte)
"inbuf" : 0x400 # input text buffer
}
#
# Library words dependency table. New library words (ie, in lib/)
# must be added to this table. What is listed is the name of every
# routine called (JSR or JMP) by the library word. This table is
# used to include only the routines necessary for the program being compiled.
#
DEPENDENCIES = {
"0trim" : ["get_ta","pop"],
"abs" : ["get_ab","comp_tb","push"],
"accept" : ["get_ta","push"],
"add1" : [],
"add" : ["get_tb","pop","push"],
"addstore" : ["get_ab"],
"ampdot" : ["get_ta","get_op1"],
"and" : ["get_ab","push"],
"booland" : ["get_ab","push"],
"areg" : ["pop"],
"fetch" : ["get_ta","push"],
"dfetch" : ["get_ta","push"],
"cfetch" : ["get_ta", "push"],
"b_and" : ["get_tb","pop","push"],
"bclr" : ["get_ab","push"],
"b_or" : ["get_tb","push"],
"bset" : ["get_ab","push"],
"btest" : ["get_ab","push"],
"btoa" : ["ptrout"],
"btod" : [],
"b_xor" : ["get_tb","pop","push"],
"bye" : [],
"call" : ["pop"],
"chout" : [],
"ch" : ["pop"],
"cls" : [],
"cmove" : ["get_ta", "get_tb"],
"cmoveb" : ["get_ta", "get_op1"],
"comp" : ["pop","push"],
"comp_ta" : [],
"comp_tb" : [],
"copy" : [],
"count" : ["get_tb", "push", "plus1"],
"cprhex" : [],
"cr" : [],
"crson" : [],
"crsoff" : [],
"ctoggle" : ["pop", "get_ta"],
"csub" : [],
"cv" : ["pop"],
"d32" : [],
"dabs" : ["get_op1","push_op1"],
"d_add" : [],
"dadd" : ["get_ops","push_res"],
"date" : ["push"],
"ddivide" : ["ddiv","push"],
"ddivmod" : ["ddiv","push"],
"ddiv" : ["get_ops","d32","neg"],
"depth" : ["push"],
"d_eq" : ["zerores"],
"deq" : ["get_ops","d_eq","push"],
"d_ge" : ["d_eq","d_gt"],
"dge" : ["get_ops","d_ge","push"],
"d_gt" : ["d_sub","iszero","zerores"],
"dgt" : ["get_ops","d_gt","push"],
"disp" : ["get_ta","chout","udiv16","push"],
"div" : ["get_ta","comp_ta","comp_tb","udiv16","push"],
"d_le" : ["d_eq","d_lt"],
"dle" : ["get_ops","d_le","push"],
"d_lt" : ["d_sub","zerores"],
"dlt" : ["get_ops","d_lt","push"],
"dmod" : ["ddiv","push"],
"dmult" : ["get_ops","neg","m32","push_res"],
"dnegate" : ["get_op1","neg","op1res","push_res"],
"d_ne" : ["d_eq"],
"dne" : ["get_ops","d_ne","push"],
"decaddr" : ["get_ta"],
"deccaddr" : ["pop"],
"dnumber" : ["pop","neg","push"],
"dprhex" : ["get_op1", "cprhex"],
"dprint" : ["get_op2","chout","neg","pntres"],
"drop2" : ["pop"],
"drop" : ["pop"],
"d_sqrt" : ["d_sub"],
"dsqrt" : ["get_op1","d_sqrt","push_res"],
"d_sub" : [],
"dsub" : ["get_ops","d_sub","push_res"],
"dtos" : ["pop"],
"dup2" : ["push"],
"duprint" : ["get_op2","btod","pntres"],
"dprint" : ["get_op2","chout","neg","btod","pntres"],
"dup" : ["push"],
"emit" : ["pop","chout"],
"eq" : ["get_ab","push"],
"exit" : [],
"execute" : ["pop"],
"erase" : ["pop","get_ab"],
"fill" : ["pop","get_ab"],
"fclose" : ["pop","push"],
"fcreate" : ["pop","push"],
"fdestroy" : ["pop","push"],
"feof" : ["pop","push"],
"fetchend" : ["push"],
"fetchinda": ["push"],
"fetchindadec": ["push"],
"fetchindainc": ["push"],
"fetchindb": ["push"],
"fetchindbdec": ["push"],
"fetchindbinc": ["push"],
"fflush" : ["pop","push"],
"fgetc" : ["pop","push"],
"fread" : ["pop","push"],
"fopen" : ["pop","push","pdos_addr"],
"fputc" : ["pop","push"],
"fseek" : ["pop","push"],
"ftell" : ["pop","push"],
"fwrite" : ["pop","push"],
"ge" : ["get_ab","csub","push"],
"get_ab" : ["get_tb","get_ta"],
"get_op1" : ["pop"],
"get_op2" : ["pop"],
"get_ops" : ["get_op2","get_op1"],
"get_ta" : ["pop"],
"get_tb" : ["pop"],
"get_file_info" : ["pop","push"],
"getcwd" : ["pop","push"],
"gt" : ["get_ab","csub","push"],
"incaddr" : ["get_ta"],
"inccaddr" : ["pop"],
"input_s" : ["push"],
"inverse" : [],
"iszero" : [],
"keyp" : ["rdykey","push"],
"key" : ["rdkey","push"],
"le" : ["get_ab","csub","push"],
"lt" : ["get_ab","csub","push"],
"m32" : ["zerores"],
"minus1" : ["pop","push"],
"minus2" : ["pop","push"],
"mod" : ["get_ab","comp_ta","comp_tb","udiv16","push"],
"mult" : ["get_ab","comp_ta","comp_tb","umult16","push"],
"negate" : ["get_ta","comp_ta","push"],
"neg" : ["add1"],
"ne" : ["get_ab","push"],
"nip" : ["get_ta","pop","push"],
"normal" : [],
"not" : ["get_ta","push"],
"n_str" : ["get_ta","ptrout","comp_ta","u_str"],
"number" : ["pop","comp_ta","push"],
"op1res" : [],
"or" : ["get_ab","push"],
"over" : ["push"],
"pad" : ["push"],
"pdos_addr": [],
"plus1" : ["get_ta","push"],
"plus2" : ["get_ta","push"],
"pntres" : ["chout"],
"pop" : [],
"pos" : ["pop"],
"prbuf" : ["chout"],
"prhex2" : ["pop", "cprhex"],
"prhex" : ["pop", "cprhex"],
"primm" : ["chout"],
"print" : ["n_str","prbuf"],
"ptrout" : [],
"push_op1" : ["push"],
"push_op2" : ["push"],
"push_rem" : ["push"],
"push_res" : ["push"],
"push" : [],
"quit" : [],
"read_block" : ["pop","push"],
"rename" : ["pop","push"],
"rdkey" : [],
"rdykey" : [],
"reset" : [],
"rot" : ["get_ta","get_tb","pop","push"],
"setcwd" : ["pop","push"],
"space" : ["chout"],
"set_file_info" : ["pop","push"],
"spfetch" : ["push"],
"stod" : ["push"],
"strcmp" : ["get_ab","push"],
"strcpy" : ["get_ab"],
"strlen" : ["get_ta","push"],
"strmatch" : ["get_ab","push"],
"strpos" : ["get_ab","push"],
"sub1" : [],
"sub" : ["get_ab","csub","push"],
"swapcell" : [],
"swap2" : ["get_ta","get_tb","pop","push"],
"swap" : ["get_ta","get_tb","push"],
"time" : ["push"],
"to_r" : ["pop"],
"type" : ["get_ta","get_tb","chout","udiv16","push"],
"from_r" : ["push"],
"r_fetch" : ["to_r", "from_r", "dup"],
"tooutbuf" : ["u_str"],
"store16" : ["get_ta","pop"],
"store32" : ["get_ta","pop"],
"store8" : ["get_ta","pop"],
"udiv16" : [],
"udiv" : ["get_ab","udiv16","push"],
"ugt" : ["get_ab","push"],
"ult" : ["get_ab","push"],
"umod" : ["get_ab","udiv16","push"],
"umult16" : [],
"umult" : ["get_ab","umult16","push"],
"uncount" : ["pop","push"],
"uprint" : ["u_str","prbuf"],
"ushiftl" : ["pop","push"],
"ushiftr" : ["pop","push"],
"u_str" : ["get_ta","btoa"],
"within" : ["over", "to_r", "from_r", "ult"],
"write_block": ["pop","push"],
"xor" : ["get_ab","push"],
"xreg" : ["pop"],
"yreg" : ["pop"],
"zerores" : []
}
#
# Mapping between library words and assembly labels.
#
LIBRARYMAP = {
">a" : "toareg",
"a>" : "fromareg",
"a!" : "storeinda",
"a@" : "fetchinda",
"a@+" : "fetchindainc",
"a@-" : "fetchindadec",
"a!+" : "storeindainc",
">b" : "tobreg",
"b>" : "frombreg",
"b!" : "storeindb",
"b@" : "fetchindb",
"b@+" : "fetchindbinc",
"b@-" : "fetchindbdec",
"b!+" : "storeindbinc",
">x" : "toxreg",
"x>" : "fromxreg",
">y" : "toyreg",
"y>" : "fromyreg",
"0trim" : "0trim",
"abs" : "abs",
"accept" : "accept",
"+" : "add",
"++" : "incaddr",
"c++" : "inccaddr",
"+!" : "addstore",
"&." : "ampdot",
"areg" : "areg",
"at" : "pos",
"@" : "fetch",
"d@" : "dfetch",
"c@" : "cfetch",
">outbuf" : "tooutbuf",
"and" : "b_and",
"bclr" : "bclr",
"or" : "b_or",
"bset" : "bset",
"btest" : "btest",
"bye" : "bye",
"xor" : "b_xor",
"call" : "call",
"ch" : "ch",
"cls" : "cls",
"cmove" : "cmove",
"cmove>" : "cmoveb",
"count" : "count",
"~" : "comp",
"cr" : "cr",
"crson" : "crson",
"crsoff" : "crsoff",
"ctoggle" : "ctoggle",
"cv" : "cv",
"dabs" : "dabs",
"date" : "date",
"d+" : "dadd",
"d/" : "ddivide",
"d/mod" : "ddivmod",
"depth" : "depth",
"d=" : "deq",
"d>=" : "dge",
"d>" : "dgt",
"disp" : "disp",
"d<=" : "dle",
"d<" : "dlt",
"dmod" : "dmod",
"d*" : "dmult",
"dnegate" : "dnegate",
"d<>" : "dne",
"dnumber" : "dnumber",
"d.$" : "dprhex",
"d." : "dprint",
"2drop" : "drop2",
"drop" : "drop",
"dsqrt" : "dsqrt",
"d-" : "dsub",
"2dup" : "dup2",
"du." : "duprint",
"dup" : "dup",
"emit" : "emit",
"end@" : "fetchend",
"exit" : "exit",
"erase" : "erase",
"=" : "eq",
"execute" : "execute",
"fclose" : "fclose",
"fdestroy" : "fdestroy",
"feof" : "feof",
"fflush" : "fflush",
"finfo@" : "get_file_info",
"finfo!" : "set_file_info",
"fgetc" : "fgetc",
"fill" : "fill",
"fopen" : "fopen",
"fputc" : "fputc",
"fread" : "fread",
"fseek" : "fseek",
"fwrite" : "fwrite",
"fcreate" : "fcreate",
"ftell" : "ftell",
"getcwd" : "getcwd",
">=" : "ge",
">" : "gt",
"input" : "input_s",
"inverse" : "inverse",
"keyp" : "keyp",
"key" : "key",
"/" : "div",
"<=" : "le",
"<" : "lt",
"1-" : "minus1",
"2-" : "minus2",
"mod" : "mod",
"*" : "mult",
"negate" : "negate",
"<>" : "ne",
"nip" : "nip",
"normal" : "normal",
"not" : "not",
"number" : "number",
"over" : "over",
"pad" : "pad",
"1+" : "plus1",
"2+" : "plus2",
".2$" : "prhex2",
".$" : "prhex",
"." : "print",
"pos" : "pos",
"quit" : "quit",
"read_block" : "read_block",
"rename" : "rename",
"reset" : "reset",
"rot" : "rot",
">r" : "to_r",
"r>" : "from_r",
"r@" : "r_fetch",
"setcwd" : "setcwd",
"space" : "space",
"sp@" : "spfetch",
"strcmp" : "strcmp",
"strcpy" : "strcpy",
"strlen" : "strlen",
"strmatch" : "strmatch",
"strpos" : "strpos",
"time" : "time",
"type" : "type",
"-" : "sub",
"--" : "decaddr",
"c--" : "deccaddr",
"2swap" : "swap2",
"swap" : "swap",
"!" : "store16",
"d!" : "store32",
"c!" : "store8",
"uncount" : "uncount",
"u/" : "udiv",
"u>" : "ugt",
"u<" : "ult",
"umod" : "umod",
"u*" : "umult",
"u." : "uprint",
"<<" : "ushiftl",
">>" : "ushiftr",
"><" : "swapcell",
"within" : "within",
"write_block": "write_block",
"xreg" : "xreg",
"yreg" : "yreg"
}
#-----------------------------------------------------------------------
# Compiler source code follows.
#-----------------------------------------------------------------------
######################################################
# SPLCompiler
#
class SPLCompiler:
"""Implements a compiler from SPL to 6502 assembly code."""
#-------------------------------------------------
# GetLabel
#
def GetLabel(self, name):
"""Return a unique label."""
label = "A%05d" % self.counter
self.counter += 1
return name+"_"+label
#-------------------------------------------------
# Decimal
#
def Decimal(self, s):
"""Interpret s as a decimal number."""
sign = +1
start = 0
if (s[0] == "-"):
sign = -1
start = 1
elif (s[0] == "+"):
start = 1
i = start
n = 0
msg = "Illegal decimal number: "
while (i < len(s)):
if (s[i] in "0123456789"):
n = 10*n + int(s[i])
elif (s[i] == "#") or (s[i] == "%"):
if (i != len(s)-1):
self.Error(msg + s)
else:
self.Error(msg + s)
i += 1
return n*sign
#-------------------------------------------------
# Binary
#
def Binary(self, s):
"""Interpret s as a binary number."""
n = i = 0
msg = "Illegal binary number: "
while (i < len(s)):
if (s[i] in "01"):
n = 2*n + int(s[i])
elif (s[i] == "#") or (s[i] == "%"):
if (i != len(s)-1):
self.Error(msg + s)
else:
self.Error(msg + s)
i += 1
return n
#-------------------------------------------------
# Hexadecimal
#
def Hexadecimal(self, s):
"""Interpret s as a hexadecimal number."""
n = i = 0
msg = "Illegal hexadecimal number: "
while (i < len(s)):
if (s[i] in "0123456789"):
n = 16*n + int(s[i])
elif (s[i].upper() in "ABCDEF"):
n = 16*n + (ord(s[i].upper()) - ord("A") + 10)
elif (s[i] == "#") or (s[i] == "%"):
if (i != len(s)-1):
self.Error(msg + s)
else:
self.Error(msg + s)
i += 1
return n
#-------------------------------------------------
# Number
#
def Number(self, s):
"""Return s as a number, if possible."""
if (type(s) != StringType):
n = 0
elif (s == ""):
n = 0
elif (len(s) < 2):
n = self.Decimal(s)
elif (s[0:2].upper() == "0X"):
n = self.Hexadecimal(s[2:])
elif (s[0] == "$"):
n = self.Hexadecimal(s[1:])
elif (s[0:2].upper() == "0B"):
n = self.Binary(s[2:])
elif (s[0] == "%"):
n = self.Binary(s[1:])
else:
n = self.Decimal(s)
return n
#-------------------------------------------------
# CheckDecimal
#
def CheckDecimal(self, s):
"""True if string s is a valid decimal number."""
try:
n = int(s)
except:
return False
return True
#-------------------------------------------------
# CheckHexadecimal
#
def CheckHexadecimal(self, s):
"""True if string s is a valid hex number."""
for t in s.upper():
if (t not in "0123456789ABCDEF"):
return False
return True
#-------------------------------------------------
# CheckBinary
#
def CheckBinary(self, s):
"""True if string s is a valid binary number."""
for t in s:
if (t not in "01"):
return False
return True
#-------------------------------------------------
# isNumber
#
def isNumber(self, s):
"""Return true if string s is a valid number."""
# It must be a string
if (type(s) != StringType):
return False
elif (s == ""):
return False
elif (len(s) < 2):
return self.CheckDecimal(s)
elif (s[0:2].upper() == "0X"):
return self.CheckHexadecimal(s[2:])
elif(s[0] == "$"):
return self.CheckHexadecimal(s[2:])
elif (s[0:2].upper() == "0B"):
return self.CheckBinary(s[2:])
elif (s[0] == "%"):
return self.CheckBinary(s[2:])
else:
return True
#-------------------------------------------------
# InvalidName
#
def InvalidName(self, name):
"""Returns true if the given name is not valid."""
if (type(name) != StringType):
return True
if (name == ""):
return True
if ((name[0].upper() < "A") or (name[0].upper() > 'Z')) and (name[0] != "_"):
return True
for c in name:
if (c.upper() not in "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_"):
return True
return False
#-------------------------------------------------
# Error
#
def Error(self, msg):
"""Output an error message and quit."""
raise ValueError("In " + self.funcName + " : " + self.Token + " : " + str(msg))
#-------------------------------------------------
# ParseCommandLine
#
def ParseCommandLine(self):
"""Parse the command line arguments."""
# Defaults
self.sys = False
self.warn = False
# List of all source code names
self.files = []
# Default output file base filename and type
self.outname = BASE_NAME
self.outtype = BASE_TYPE
next = 0
for s in sys.argv[1:]:
if (s == "-o"):
next = 1
elif (s == "-t"):
next = 2
elif (s == "-org"):
next = 3
elif (s == "-var"):
next = 4
elif (s == "-stack"):
next = 5
elif (s == "-sys"):
self.sys = True
elif (s == "-warn"):
self.warn = True
elif (s == "-prodos"):
self.VARTOP = 0x89ff
else:
if (next == 1):
self.outname = s
next = 0
elif (next == 2):
self.outtype = s
next = 0
elif (next == 3):
self.cmdOrigin = self.Number(s)
next = 0
elif (next == 4):
self.VARTOP = self.Number(s)
next = 0
elif (next == 5):
EQUATES["stack"] = self.Number(s)
next = 0
else:
self.files.append(s)
#-------------------------------------------------
# LoadFiles
#
def LoadFiles(self):
"""Load the source code on the command line."""
self.source = ""
for fname in self.files:
# If no .spl extension, add it
if fname.find(".spl") == -1:
fname += ".spl"
try:
# Open the file as given on the command line
f = open(fname,"r")
except:
# Is it in the include directory?
try:
f = open(INCLUDE_DIR + fname, "r")
except:
self.Error("Unable to locate %s" % fname)
# Append to the source string
self.source += (f.read() + "\n")
f.close()
#-------------------------------------------------
# Tokenize
#
def Tokenize(self):
"""Tokenize the input source code."""
if self.source == "":
return
self.tokens = []
inToken = inString = inComment = inCode = False
delim = ""
t = ""
for c in self.source:
if (inString):
if (c == delim):
t += c
self.tokens.append(t)
t = ""
inString = False
else:
t += c
elif (inComment):
if (c == "\n"):
inComment = False
elif (c == ")"):
inComment = False
elif (inToken):
if (c <= " "):
inToken = False
self.tokens.append(t)
t = ""
else:
t += c
else:
if (c == "["):
inCode = True
if (c == "]"):
inCode = False
if (c == '"') or (c == "'"):
inString = True
delim = c
t += c
elif (c == "#") and not inCode:
inComment = True
elif (c == "(") and not inCode:
inComment = True
elif (c == ")") and not inCode:
inComment = False
elif (c <= " "):
pass # ignore whitespace
else:
t += c
inToken = True
#-------------------------------------------------
# SetOrigin
#
def SetOrigin(self):
"""Set the output origin position."""
# Use the command line setting, if given
if (self.cmdOrigin != -1):
self.org = self.cmdOrigin
else:
self.org = ORG
next = indef = False
for i in self.tokens:
if (i == "org"):
if (indef):
self.Error("Origin statements cannot be within functions.")
next = True
elif (i == "def"):
indef = True
elif (i == ":"):
indef = True
elif (i == "end"):
indef = False
elif (i == ";"):
indef = False
elif (next):
self.org = self.Number(i)
if (self.org < 0) or (self.org > 65535):
self.Error("Illegal origin address: " + str(self.org))
return
#-------------------------------------------------
# AddName
#
def AddName(self, name):
"""Add a new name to the names dictionary."""
if self.names.has_key(name):
self.Error("Duplicate name found: " + str(name))
# self.names[name] = self.GetLabel(name)
self.names[name] = name
#-------------------------------------------------
# Declarations
#
def Declarations(self):
"""Locate all defined variables, constants and strings."""
# Dictionaries of all defined variables, and numeric and string constants
# accessed by name as key.
self.vars = {}
self.consts = {}
self.str = {}
indef = False
i = 0
while (i < len(self.tokens)):
if (self.tokens[i] == "var"):
if (indef):
self.Error("Variables cannot be defined within functions.")
if (i+2) >= len(self.tokens):
self.Error("Syntax error: too few tokens for variable declaration.")
name = self.tokens[i+1]
bytes= self.Number(self.tokens[i+2])
i += 2
if (self.InvalidName(name)):
self.Error("Illegal variable name: " + str(name))
if (bytes <= 0) or (bytes >= 65535):
self.Error("Illegal variable size: " + name + ", size = " + str(bytes))
self.vars[name] = bytes
self.symtbl[name] = "VAR"
self.AddName(name)
elif (self.tokens[i] == "const"):
if (indef):
self.Error("Constants cannot be defined within functions.")
if (i+2) >= len(self.tokens):
self.Error("Syntax error: too few tokens for constant declaration.")
name = self.tokens[i+1]
val = self.Number(self.tokens[i+2])
i += 2
if (self.InvalidName(name)):
self.Error("Illegal constant name: " + str(name))
if (val < -32768) or (val >= 65535):
self.Error("Illegal constant value: " + name + ", value = " + str(val))
self.consts[name] = val
self.symtbl[name] = "CONST"
self.AddName(name)
elif (self.tokens[i] == "str"):
if (indef):
self.Error("Strings cannot be defined within functions.")
if (i+2) >= len(self.tokens):
self.Error("Syntax error: too few tokens for string declaration.")
name = self.tokens[i+1]
val = self.tokens[i+2]
i += 2
if (self.InvalidName(name)):
self.Error("Illegal string name: " + str(name))
if (val == ""):
self.Error("Illegal string value, name = " + str(name))
self.str[name] = val
self.symtbl[name] = "STR"
self.AddName(name)
elif (self.tokens[i] == "def"):
indef = True
elif (self.tokens[i] == ":"):
indef = True
elif (self.tokens[i] == "end"):
indef = False
elif (self.tokens[i] == ";"):
indef = False
i += 1
#-------------------------------------------------
# ParseDataBlocks
#
def ParseDataBlocks(self):
"""Get all data blocks."""
# Dictionary of all data blocks. Each entry stores the data values
# for that block.
self.dataBlocks = {}
indata = False
i = 0
name = ""
data = []
while (i < len(self.tokens)):
if (self.tokens[i] == "data"):
if (indata):
self.Error("Data blocks may not be nested.")
indata = True
data = []
if (i+1) >= len(self.tokens):
self.Error("Too few tokens for data block declaration.")
name = self.tokens[i+1]
if (self.InvalidName(name)):
print i
self.Error("Illegal data block name: " + str(name))
i += 2
elif (self.tokens[i] == "end") and (indata):
indata = False
self.dataBlocks[name] = data
self.symtbl[name] = "DATA"
self.AddName(name)
i += 1
elif (indata):
data.append(self.tokens[i])
i += 1
else:
i += 1
#-------------------------------------------------
# ParseCodeBlocks
#
def ParseCodeBlocks(self):
"""Get a code block."""