mirror of
https://github.com/irmen/prog8.git
synced 2024-08-20 21:29:18 +00:00
340 lines
7.2 KiB
Python
340 lines
7.2 KiB
Python
"""
|
|
Programming Language for 6502/6510 microprocessors, codename 'Sick'
|
|
This is the lexer of the IL65 code, that generates a stream of tokens for the parser.
|
|
|
|
Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
|
|
"""
|
|
|
|
import sys
|
|
import ply.lex
|
|
import attr
|
|
|
|
|
|
@attr.s(slots=True, frozen=True)
|
|
class SourceRef:
|
|
file = attr.ib(type=str)
|
|
line = attr.ib(type=int)
|
|
column = attr.ib(type=int, default=0)
|
|
|
|
def __str__(self) -> str:
|
|
if self.column:
|
|
return "{:s}:{:d}:{:d}".format(self.file, self.line, self.column)
|
|
if self.line:
|
|
return "{:s}:{:d}".format(self.file, self.line)
|
|
return self.file
|
|
|
|
|
|
# token names
|
|
|
|
tokens = (
|
|
"INTEGER",
|
|
"FLOATINGPOINT",
|
|
"DOTTEDNAME",
|
|
"NAME",
|
|
"IS",
|
|
"CLOBBEREDREGISTER",
|
|
"REGISTER",
|
|
"COMMENT",
|
|
"DIRECTIVE",
|
|
"AUGASSIGN",
|
|
"EQUALS",
|
|
"NOTEQUALS",
|
|
"RARROW",
|
|
"RETURN",
|
|
"VARTYPE",
|
|
"SUB",
|
|
"DATATYPE",
|
|
"CHARACTER",
|
|
"STRING",
|
|
"BOOLEAN",
|
|
"GOTO",
|
|
"INCR",
|
|
"DECR",
|
|
"LT",
|
|
"GT",
|
|
"LE",
|
|
"GE",
|
|
"BITAND",
|
|
"BITOR",
|
|
"BITXOR",
|
|
"BITINVERT",
|
|
"LOGICAND",
|
|
"LOGICOR",
|
|
"LOGICNOT",
|
|
"POWER",
|
|
"LABEL",
|
|
"IF",
|
|
"PRESERVEREGS",
|
|
"INLINEASM",
|
|
"ENDL"
|
|
)
|
|
|
|
literals = ['+', '-', '*', '/', '(', ')', '[', ']', '{', '}', '.', ',', '!', '?', ':']
|
|
|
|
# regex rules for simple tokens
|
|
|
|
t_BITAND = r"&"
|
|
t_BITOR = r"\|"
|
|
t_BITXOR = r"\^"
|
|
t_BITINVERT = r"~"
|
|
t_IS = r"="
|
|
t_AUGASSIGN = r"\+=|-=|/=|\*=|<<=|>>=|&=|\|=|\^="
|
|
t_DECR = r"--"
|
|
t_INCR = r"\+\+"
|
|
t_EQUALS = r"=="
|
|
t_NOTEQUALS = r"!="
|
|
t_LT = r"<"
|
|
t_GT = r">"
|
|
t_LE = r"<="
|
|
t_GE = r">="
|
|
t_IF = "if(_[a-z]+)?"
|
|
t_RARROW = r"->"
|
|
t_POWER = r"\*\*"
|
|
|
|
|
|
# ignore inline whitespace
|
|
t_ignore = " \t"
|
|
t_inlineasm_ignore = " \t\r\n"
|
|
|
|
|
|
# states for allowing %asm inclusion of raw assembly
|
|
states = (
|
|
('inlineasm', 'exclusive'),
|
|
)
|
|
|
|
# reserved words
|
|
reserved = {
|
|
"sub": "SUB",
|
|
"var": "VARTYPE",
|
|
"memory": "VARTYPE",
|
|
"const": "VARTYPE",
|
|
"goto": "GOTO",
|
|
"return": "RETURN",
|
|
"true": "BOOLEAN",
|
|
"false": "BOOLEAN",
|
|
"not": "LOGICNOT",
|
|
"and": "LOGICAND",
|
|
"or": "LOGICOR",
|
|
"AX": "REGISTER",
|
|
"AY": "REGISTER",
|
|
"XY": "REGISTER",
|
|
"SC": "REGISTER",
|
|
"SI": "REGISTER",
|
|
"SZ": "REGISTER",
|
|
"A": "REGISTER",
|
|
"X": "REGISTER",
|
|
"Y": "REGISTER",
|
|
"if": "IF",
|
|
"if_true": "IF",
|
|
"if_not": "IF",
|
|
"if_zero": "IF",
|
|
"if_ne": "IF",
|
|
"if_eq": "IF",
|
|
"if_cc": "IF",
|
|
"if_cs": "IF",
|
|
"if_vc": "IF",
|
|
"if_vs": "IF",
|
|
"if_ge": "IF",
|
|
"if_le": "IF",
|
|
"if_gt": "IF",
|
|
"if_lt": "IF",
|
|
"if_pos": "IF",
|
|
"if_get": "IF",
|
|
}
|
|
|
|
|
|
# rules for tokens with some actions
|
|
|
|
def t_inlineasm(t):
|
|
r"%asm\s*\{[^\S\n]*"
|
|
t.lexer.code_start = t.lexer.lexpos # Record start position
|
|
t.lexer.level = 1 # initial brace level
|
|
t.lexer.begin("inlineasm") # enter state 'inlineasm'
|
|
|
|
|
|
def t_inlineasm_lbrace(t):
|
|
r"\{"
|
|
t.lexer.level += 1
|
|
|
|
|
|
def t_inlineasm_rbrace(t):
|
|
r"\}"
|
|
t.lexer.level -= 1
|
|
# if closing brace, return code fragment
|
|
if t.lexer.level == 0:
|
|
t.value = t.lexer.lexdata[t.lexer.code_start:t.lexer.lexpos-1]
|
|
t.type = "INLINEASM"
|
|
t.lexer.lineno += t.value.count("\n")
|
|
t.lexer.begin("INITIAL") # back to normal lexing rules
|
|
return t
|
|
|
|
|
|
def t_inlineasm_comment(t):
|
|
r";[^\n]*"
|
|
pass
|
|
|
|
|
|
def t_inlineasm_string(t):
|
|
r"""(?x) # verbose mode
|
|
(?<!\\) # not preceded by a backslash
|
|
" # a literal double-quote
|
|
.*? # 1-or-more characters
|
|
(?<!\\) # not preceded by a backslash
|
|
" # a literal double-quote
|
|
|
|
|
(?<!\\) # not preceded by a backslash
|
|
' # a literal single quote
|
|
.*? # 1-or-more characters
|
|
(?<!\\) # not preceded by a backslash
|
|
' # a literal double-quote
|
|
"""
|
|
pass
|
|
|
|
|
|
def t_inlineasm_nonspace(t):
|
|
r'[^\s\{\}\'\"]+'
|
|
pass
|
|
|
|
|
|
def t_inlineasm_error(t):
|
|
# For bad characters, we just skip over it
|
|
t.lexer.skip(1)
|
|
|
|
|
|
def t_CLOBBEREDREGISTER(t):
|
|
r"(AX|AY|XY|A|X|Y)\?"
|
|
t.value = t.value[:-1]
|
|
return t
|
|
|
|
|
|
def t_DATATYPE(t):
|
|
r"\.byte|\.wordarray|\.float|\.array|\.word|\.text|\.stext|\.ptext|\.pstext|\.matrix"
|
|
t.value = t.value[1:]
|
|
return t
|
|
|
|
|
|
def t_LABEL(t):
|
|
r"[a-zA-Z_]\w*\s*:"
|
|
t.value = t.value[:-1].strip()
|
|
return t
|
|
|
|
|
|
def t_DOTTEDNAME(t):
|
|
r"[a-zA-Z_]\w*(\.[a-zA-Z_]\w*)+"
|
|
return t
|
|
|
|
|
|
def t_NAME(t):
|
|
r"[a-zA-Z_]\w*"
|
|
t.type = reserved.get(t.value, "NAME") # check for reserved words
|
|
return t
|
|
|
|
|
|
def t_DIRECTIVE(t):
|
|
r"%[a-z]+\b"
|
|
t.value = t.value[1:]
|
|
return t
|
|
|
|
|
|
def t_STRING(t):
|
|
r"""(?x) # verbose mode
|
|
(?<!\\) # not preceded by a backslash
|
|
" # a literal double-quote
|
|
.*? # 1-or-more characters
|
|
(?<!\\) # not preceded by a backslash
|
|
" # a literal double-quote
|
|
|
|
|
(?<!\\) # not preceded by a backslash
|
|
' # a literal single quote
|
|
.*? # 1-or-more characters
|
|
(?<!\\) # not preceded by a backslash
|
|
' # a literal double-quote
|
|
"""
|
|
t.value = t.value[1:-1]
|
|
if len(t.value) == 1:
|
|
t.type = "CHARACTER"
|
|
if len(t.value) == 2 and t.value[0] == '\\':
|
|
t.type = "CHARACTER"
|
|
return t
|
|
|
|
|
|
def t_FLOATINGPOINT(t):
|
|
r"((?: (?: \d* \. \d+ ) | (?: \d+ \.? ) )(?: [Ee] [+-]? \d+ ) ?)(?![a-z])"
|
|
try:
|
|
t.value = int(t.value)
|
|
t.type = "INTEGER"
|
|
except ValueError:
|
|
t.value = float(t.value)
|
|
return t
|
|
|
|
|
|
def t_INTEGER(t):
|
|
r"\$?[a-fA-F\d]+ | [\$%]?\d+ | %?[01]+"
|
|
sign = 1
|
|
if t.value[0] in "+-":
|
|
sign = -1 if t.value[0] == "-" else 1
|
|
t.value = t.value[1:]
|
|
if t.value[0] == '$':
|
|
t.value = int(t.value[1:], 16) * sign
|
|
elif t.value[0] == '%':
|
|
t.value = int(t.value[1:], 2) * sign
|
|
else:
|
|
t.value = int(t.value) * sign
|
|
return t
|
|
|
|
|
|
def t_COMMENT(t):
|
|
r"[ \t]*;[^\n]*" # dont eat newline
|
|
return None # don't process comments
|
|
|
|
|
|
def t_PRESERVEREGS(t):
|
|
r"!\s*[AXY]{0,3}\s*(?!=)"
|
|
t.value = t.value[1:-1].strip()
|
|
return t
|
|
|
|
|
|
def t_ENDL(t):
|
|
r"\n+"
|
|
t.lexer.lineno += len(t.value)
|
|
t.value = "\n"
|
|
return t # end of lines are significant to the parser
|
|
|
|
|
|
def t_error(t):
|
|
line, col = t.lineno, find_tok_column(t)
|
|
filename = getattr(t.lexer, "source_filename", "<unknown-file>")
|
|
sref = SourceRef(filename, line, col)
|
|
if hasattr(t.lexer, "error_function"):
|
|
t.lexer.error_function(sref, "illegal character '{:s}'", t.value[0])
|
|
else:
|
|
print("{}: illegal character '{:s}'".format(sref, t.value[0]), file=sys.stderr)
|
|
t.lexer.skip(1)
|
|
|
|
|
|
def find_tok_column(token):
|
|
""" Find the column of the token in its line."""
|
|
last_cr = lexer.lexdata.rfind('\n', 0, token.lexpos)
|
|
return token.lexpos - last_cr
|
|
|
|
|
|
def print_warning(text: str, sourceref: SourceRef = None) -> None:
|
|
if sourceref:
|
|
print_bold("warning: {}: {:s}".format(sourceref, text))
|
|
else:
|
|
print_bold("warning: " + text)
|
|
|
|
|
|
def print_bold(text: str) -> None:
|
|
if sys.stdout.isatty():
|
|
print("\x1b[1m" + text + "\x1b[0m", flush=True)
|
|
else:
|
|
print(text)
|
|
|
|
|
|
lexer = ply.lex.lex()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
ply.lex.runmain()
|