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pirric.pir
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pirric.pir
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# Copyright (C) 2008, Parrot Foundation.
# $Id$
#
# pirric.pir
# A rudimentary old style Basic interpreter for parrot
# This is a proof of concept version, don't blame for redundant code
# and other ugliness
#
# pirric is PIR Retro basIC
#
# Only one instruction per line.
#
# Instructions implemented:
# - Flow control: GOTO, GOSUB, RETURN, RUN, END, STOP, CONT, EXIT
# - Conditional: IF/ELSE
# - Loop: FOR/NEXT
# - Programming: LIST, LOAD, SAVE
# - Debugging: TRON, TROFF
# - Input/Output: PRINT
# - Error control: ERROR, ON ERROR GOTO, ON ERROR EXIT
# - Miscellaneous: REM, CLEAR
# - Variables: varname = expression
# - Access to parrot modules: LOAD "module name" , B
#
# Shorthands:
# - ? -> PRINT
#
# Expressions:
# - Operators: + - * / < > = unary+ unary- MOD ^
# - Predefined numeric functions: COMPLEX, SQR, EXP, LN, SIN, COS, TAN, ASIN, ACOS, ATAN, SINH, COSH, TANH
# - Predefined string functions: CHR$, ASC, LEN, LEFT$, RIGHT$, MID$
# - Parenthesis
# - Indexing with [ ]
# - Special functions: NEW, ISA, COMPREG, GETPARROTINTERP
# - Calls to methods in foreign objects
# - Calls to functions in foreign namespaces
#
# Command line options:
# -d Parrot debugger mode. Jumps to the debugger after each
# TRON line inform and after the 'Ready' prompt.
# -t Trace on. Same as the TRON instruction
# -p all remaining arguments are executed as PRINT instructions
#-----------------------------------------------------------------------
.include 'iterator.pasm'
.include 'except_severity.pasm'
.include 'except_types.pasm'
.include 'cclass.pasm'
.include 'warnings.pasm'
.loadlib 'io_ops'
.loadlib 'debug_ops'
.loadlib 'trans_ops'
#-----------------------------------------------------------------------
.sub pirric_aux_loadbytecode
.param string bcname
load_bytecode bcname
.end
.HLL 'parrot'
#-----------------------------------------------------------------------
.const int PIRRIC_ERROR_NORMAL = 0
.const int PIRRIC_ERROR_EXIT = 1
.const int PIRRIC_ERROR_GOTO = 2
#-----------------------------------------------------------------------
.sub init :load :init
warningson .PARROT_WARNINGS_DEPRECATED_FLAG
.local pmc func
func = get_global ['Tokenizer'], 'newTokenizer'
set_global 'newTokenizer', func
.local pmc cl
cl = newclass ['Tokenizer']
addattribute cl, 'line'
addattribute cl, 'pos'
addattribute cl, 'last'
addattribute cl, 'pending'
.local pmc progclass
progclass = newclass ['Program']
addattribute progclass, 'text'
addattribute progclass, 'lines'
.local pmc runnerclass
runnerclass = newclass ['Runner']
addattribute runnerclass, 'program'
addattribute runnerclass, 'exitcode'
addattribute runnerclass, 'errormode'
addattribute runnerclass, 'errorvalue'
addattribute runnerclass, 'curline'
addattribute runnerclass, 'vars'
addattribute runnerclass, 'stack'
addattribute runnerclass, 'debugger'
addattribute runnerclass, 'tron'
$P0 = get_class 'String'
cl = newclass 'Literal'
addparent cl, $P0
set_global 'Literal', cl
.local pmc keywords, methods
# Get methods hash to verify
methods = inspect runnerclass, 'methods'
keywords = new 'Hash'
setkeyword(methods, keywords, 'CLEAR')
setkeyword(methods, keywords, 'CONT')
setkeyword(methods, keywords, 'END')
setkeyword(methods, keywords, 'EXIT')
setkeyword(methods, keywords, 'ERROR')
setkeyword(methods, keywords, 'FOR')
setkeyword(methods, keywords, 'GOSUB')
setkeyword(methods, keywords, 'GOTO')
setkeyword(methods, keywords, 'IF')
setkeyword(methods, keywords, 'LIST')
setkeyword(methods, keywords, 'LOAD')
setkeyword(methods, keywords, 'NEXT')
setkeyword(methods, keywords, 'NEW')
setkeyword(methods, keywords, 'ON')
setkeyword(methods, keywords, 'PRINT')
setkeyword(methods, keywords, 'REM')
setkeyword(methods, keywords, 'RETURN')
setkeyword(methods, keywords, 'RUN')
setkeyword(methods, keywords, 'SAVE')
setkeyword(methods, keywords, 'STOP')
setkeyword(methods, keywords, 'TROFF')
setkeyword(methods, keywords, 'TRON')
set_global 'keywords', keywords
.local pmc predefs
predefs = new 'Hash'
setpredef(methods, predefs, 'NEW')
setpredef(methods, predefs, 'ISA')
setpredef(methods, predefs, 'GETPARROTINTERP')
setpredef(methods, predefs, 'CHR$', 'CHR_S')
setpredef(methods, predefs, 'ASC')
setpredef(methods, predefs, 'LEN')
setpredef(methods, predefs, 'LEFT$', 'LEFT_S')
setpredef(methods, predefs, 'RIGHT$', 'RIGHT_S')
setpredef(methods, predefs, 'MID$', 'MID_S')
setpredef(methods, predefs, 'COMPLEX')
setpredef(methods, predefs, 'COMPREG')
setpredef(methods, predefs, 'EXP')
setpredef(methods, predefs, 'LN')
setpredef(methods, predefs, 'SIN')
setpredef(methods, predefs, 'SINH')
setpredef(methods, predefs, 'COS')
setpredef(methods, predefs, 'COSH')
setpredef(methods, predefs, 'TAN')
setpredef(methods, predefs, 'TANH')
setpredef(methods, predefs, 'ASIN')
setpredef(methods, predefs, 'ACOS')
setpredef(methods, predefs, 'ATAN')
setpredef(methods, predefs, 'SQR')
set_global 'predefs', predefs
# Create classes for control flow exceptions
.local pmc pircontrol
pircontrol = newclass ['pircontrol']
.local pmc basejump
basejump = subclass pircontrol, ['basejump']
addattribute basejump, 'jumpline'
.local pmc endclass
endclass = subclass pircontrol, ['End']
.local pmc exitclass
exitclass = subclass pircontrol, ['Exit']
.local pmc returnclass
returnclass = subclass pircontrol, ['Return']
.local pmc nextclass
nextclass = subclass basejump, ['Next']
.local pmc jumpclass
jumpclass = subclass basejump, ['Jump']
addattribute jumpclass, 'jumptype'
.local pmc stopclass
stopclass = subclass pircontrol, ['Stop']
.local pmc contclass
stopclass = subclass pircontrol,['Cont']
.local pmc forclass
forclass = subclass basejump, ['For']
addattribute forclass, 'controlvar'
addattribute forclass, 'increment'
addattribute forclass, 'limit'
.end
#-----------------------------------------------------------------------
.sub main :main
.param pmc args
.local pmc program
program = new ['Program']
.local pmc runner
runner = new ['Runner']
setattribute runner, 'program', program
$I0 = args
$I1 = 1
read_args:
le $I0, $I1, no_prog
.local string arg
arg = args[$I1]
if arg == '-d' goto opt_debugger
if arg == '-t' goto opt_tron
if arg == '-p' goto print_items
#say arg
program.'load'(arg)
$I0 = 1
goto start
opt_debugger:
debug_init
runner.'debugger'()
inc $I1
goto read_args
opt_tron:
runner.'trace'(1)
inc $I1
goto read_args
print_items:
.local pmc tokenizer
inc $I1
le $I0, $I1, print_end
$S9 = args [$I1]
tokenizer = newTokenizer($S9)
runner.'func_PRINT'(tokenizer)
null tokenizer
goto print_items
print_end:
exit 0
no_prog:
$I0 = 0
start:
$I1 = runner.'runloop'($I0)
exit $I1
.end
#-----------------------------------------------------------------------
.sub setkeyword
.param pmc methods
.param pmc keywords
.param string key
.local string funcname
funcname = concat 'func_', key
.local pmc func
func = methods[funcname]
$I0 = defined func
if $I0 goto good
print funcname
die ': No func!'
exit 1
good:
keywords [key] = func
.end
#-----------------------------------------------------------------------
.sub setpredef
.param pmc methods
.param pmc predefs
.param string key
.param string name :optional
.param int has_name :opt_flag
if has_name goto setfuncname
name = key
setfuncname:
.local string funcname
funcname = concat 'predef_', name
.local pmc func
func = methods[funcname]
$I0 = defined func
if $I0 goto good
print funcname
say ': no func!'
exit 1
good:
predefs [key] = func
.end
#-----------------------------------------------------------------------
.sub FatalError
.param string msg
.local pmc excep
excep = new 'Exception'
.local pmc aux
aux = new 'String'
aux = msg
setattribute excep, 'message', aux
aux = new 'Integer'
aux = .EXCEPT_FATAL
setattribute excep, 'severity', aux
throw excep
.end
#-----------------------------------------------------------------------
.sub UserError
.param string msg
.local pmc excep, message, severity
message = new 'String'
message = 'ERROR: '
concat message, msg
severity = new 'Integer'
severity = .EXCEPT_ERROR
excep = new 'Exception'
setattribute excep, 'message', message
setattribute excep, 'severity', severity
throw excep
.end
#-----------------------------------------------------------------------
.sub SyntaxError
.local pmc excep
excep = new 'Exception'
.local pmc aux
aux = new 'String'
aux = 'Syntax error'
setattribute excep, 'message', aux
aux = new 'Integer'
aux = .EXCEPT_ERROR
setattribute excep, 'severity', aux
throw excep
.end
#-----------------------------------------------------------------------
.sub VarNotDefined
.local pmc excep
excep = new 'Exception'
.local pmc aux
aux = new 'String'
aux = 'Variable not found'
setattribute excep, 'message', aux
aux = new 'Integer'
aux = .EXCEPT_ERROR
setattribute excep, 'severity', aux
throw excep
.end
#-----------------------------------------------------------------------
.sub readlinebas
.param pmc file
.param int interactive :optional
.local string line
if interactive goto read_inter
line = readline file
goto read_done
read_inter:
line = file.'readline_interactive'()
read_done:
$I1 = length line
checkline:
if $I1 < 1 goto done
dec $I1
$I2 = is_cclass .CCLASS_NEWLINE, line, $I1
unless $I2 goto done
line = substr line, 0, $I1
goto checkline
done:
.return(line)
.end
########################################################################
.namespace ['Runner']
#-----------------------------------------------------------------------
.sub init :vtable
$P0 = new 'Integer'
$P0 = 0
setattribute self, 'tron', $P0
$P0 = new 'Integer'
$P0 = 0
setattribute self, 'debugger', $P0
$P1 = new 'ResizablePMCArray'
setattribute self, 'stack', $P1
$P2 = new 'Integer'
$P2 = PIRRIC_ERROR_NORMAL
setattribute self, 'errormode', $P2
$P3 = new 'Integer'
setattribute self, 'errorvalue', $P3
$P4 = new 'Integer'
setattribute self, 'exitcode', $P4
self.'clear_vars'()
.end
#-----------------------------------------------------------------------
.sub clear_vars :method
.local pmc vars
vars = new 'Hash'
setattribute self, 'vars', vars
.end
#-----------------------------------------------------------------------
.sub get_var :method
.param string varname
.local pmc vars, var
vars = getattribute self, 'vars'
varname = upcase varname
var = vars[varname]
.return(var)
.end
#-----------------------------------------------------------------------
.sub set_var :method
.param string varname
.param pmc value
.local pmc vars, var
vars = getattribute self, 'vars'
varname = upcase varname
vars[varname] = value
.end
#-----------------------------------------------------------------------
.sub set_error_exit :method
.param int code
$P0 = getattribute self, 'errormode'
$P0 = PIRRIC_ERROR_EXIT
$P1 = getattribute self, 'errorvalue'
$P1 = code
.end
#-----------------------------------------------------------------------
.sub set_error_goto :method
.param int code
.local int newmode
newmode = PIRRIC_ERROR_GOTO
ne code, 0, setmode
# ON ERROR GOTO 0 means use default error handling
newmode = PIRRIC_ERROR_NORMAL
setmode:
$P0 = getattribute self, 'errormode'
$P0 = newmode
$P1 = getattribute self, 'errorvalue'
$P1 = code
.end
#-----------------------------------------------------------------------
.sub clear_all :method
.local pmc stack
self.'clear_vars'()
stack = getattribute self, 'stack'
stack = 0
.end
#-----------------------------------------------------------------------
.sub set_program :method
.param pmc program
setattribute self, 'program', program
.end
#-----------------------------------------------------------------------
.sub getcurline :method
$P0 = getattribute self, 'curline'
$S0 = $P0
.return($S0)
.end
#-----------------------------------------------------------------------
.sub debugger :method
$P0 = getattribute self, 'debugger'
$P0 = 1
.end
#-----------------------------------------------------------------------
.sub trace :method
.param int level
$P0 = getattribute self, 'tron'
$P0 = level
.end
#-----------------------------------------------------------------------
.sub get_numeric_arg :method
.param pmc tokenizer
.local pmc arg
arg = self.'evaluate'(tokenizer)
$P0 = tokenizer.'get'()
$I0 = defined $P0
unless $I0 goto fail
ne $P0, ')', fail
$I0 = isa arg, 'Integer'
unless $I0 goto done
$I0 = arg
$N0 = $I0
arg = new 'Float'
arg = $N0
done:
.return(arg)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub get_1_arg :method
.param pmc tokenizer
.local pmc arg
arg = self.'evaluate'(tokenizer)
$P0 = tokenizer.'get'()
$I0 = defined $P0
unless $I0 goto fail
ne $P0, ')', fail
.return(arg)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub get_2_args :method
.param pmc tokenizer
.local pmc arg1, arg2
arg1 = self.'evaluate'(tokenizer)
$P0 = tokenizer.'get'()
if_null $P0, fail
$I0 = defined $P0
unless $I0 goto fail
ne $P0, ',', fail
arg2 = self.'evaluate'(tokenizer)
$P0 = tokenizer.'get'()
if_null $P0, fail
$I0 = defined $P0
unless $I0 goto fail
ne $P0, ')', fail
.return(arg1, arg2)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub get_args :method
.param pmc tokenizer
.local pmc args
.local pmc arg
.local pmc token
.local pmc delim
args = new 'ResizablePMCArray'
token = tokenizer.'get'()
$I0 = defined token
unless $I0 goto fail
eq token, ')', empty
null arg
arg = self.'evaluate'(tokenizer, token)
nextarg:
push args, arg
null arg
delim = tokenizer.'get'()
if_null delim, fail
$I0 = defined delim
unless $I0 goto fail
eq delim, ')', endargs
ne delim, ',', fail
arg = self.'evaluate'(tokenizer)
goto nextarg
endargs:
.return(args)
empty:
null $P0
.return($P0)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_NEW :method
.param pmc tokenizer
.local pmc args
.local int nargs
.local string name
.local pmc obj
$P1 = tokenizer.'get'()
ne $P1, '(', fail
args = self.'get_args'(tokenizer)
$I0 = defined args
unless $I0 goto fail
nargs = args
name = args [0]
#print 'NEW: '
#say name
eq nargs, 1, noarg
.local pmc arg1
arg1 = args [1]
#say arg1
obj = new name, arg1
goto done
noarg:
obj = new name
done:
.return(obj)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_ISA :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
($P1, $P2) = self.'get_2_args'(tokenizer)
$I0 = isa $P1, $P2
$P0 = new 'Integer'
$P0 = $I0
.return($P0)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_GETPARROTINTERP :method
.param pmc tokenizer
$P0 = getinterp
.return($P0)
.end
#-----------------------------------------------------------------------
.sub predef_CHR_S :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_1_arg'(tokenizer)
$I0 = $P2
$S0 = chr $I0
$I1 = find_encoding 'utf8'
$S0 = trans_encoding $S0, $I1
$P3 = new 'String'
$P3 = $S0
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_ASC :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_1_arg'(tokenizer)
$S0 = $P2
$I0 = ord $S0
$P3 = new 'Integer'
$P3 = $I0
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_LEN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
null $P5
$P5 = self.'get_1_arg'(tokenizer)
$S5 = $P5
$I0 = length $S5
$P6 = new 'Integer'
$P6 = $I0
.return($P6)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_LEFT_S :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
null $P5
null $P6
($P5, $P6) = self.'get_2_args'(tokenizer)
$S0 = $P5
$I0 = $P6
$S1 = substr $S0, 0, $I0
$P7 = new 'String'
$P7 = $S1
.return($P7)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_RIGHT_S :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
null $P5
null $P6
($P5, $P6) = self.'get_2_args'(tokenizer)
$S0 = $P5
$I0 = $P6
$I1 = $S0
$I0 = $I1 - $I0
$S1 = substr $S0, $I0
$P7 = new 'String'
$P7 = $S1
.return($P7)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_MID_S :method
.param pmc tokenizer
$P0 = tokenizer.'get'()
ne $P0, '(', fail
$P1 = self.'get_args'(tokenizer)
$I0 = $P1
lt $I0, 2, fail
gt $I0, 3, fail
$S0 = $P1[0]
$I1 = $P1[1]
dec $I1
lt $I0, 3, mid_nolen
$I2 = $P1[2]
$S1 = substr $S0, $I1, $I2
goto mid_result
mid_nolen:
$S1 = substr $S0, $I1
mid_result:
$P2 = new 'String'
$P2 = $S1
.return($P2)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_COMPLEX :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
null $P5
null $P6
($P5, $P6) = self.'get_2_args'(tokenizer)
$P7 = new 'Complex'
$N5 = $P5
$N6 = $P6
$P7[0] = $N5
$P7[1] = $N6
.return($P7)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_COMPREG :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_1_arg'(tokenizer)
$S1 = $P2
$P3 = compreg $S1
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_EXP :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'exp'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_LN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'ln'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_SIN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'sin'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_SINH :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'sinh'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_COS :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'cos'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_COSH :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'cosh'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_TAN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'tan'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_TANH :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'tanh'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_ASIN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'asin'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_ACOS :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'acos'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_ATAN :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'atan'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub predef_SQR :method
.param pmc tokenizer
$P1 = tokenizer.'get'()
ne $P1, '(', fail
$P2 = self.'get_numeric_arg'(tokenizer)
$P3 = $P2.'sqrt'()
.return($P3)
fail:
SyntaxError()
.end
#-----------------------------------------------------------------------
.sub get_args_and_call :method
.param pmc tokenizer
.param pmc fun
.local pmc args, result
args = self.'get_args'(tokenizer)
$I0 = defined args
unless $I0 goto emptyargs
result = fun(args :flat)
goto done
emptyargs:
result = fun()
done:
.return(result)
.end
#-----------------------------------------------------------------------
.sub eval_base :method
.param pmc tokenizer
.param pmc token :optional
.local pmc arg