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# -*- coding: utf-8 -*-
# Copyright (C) 2019 by Juan J. Martinez <jjm@usebox.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import collections
import configparser
import json
import sys
import os
import re
import argparse
from os import path
version = "0.7.1"
OUR_COMMENT = re.compile(r"(\[[0-9.\s/]+\])")
DEF_COLUMN = 50
DEF_TABSTOP = 8
DEF_CONFIG_FILE = "z80countrc"
def perror(message, *args, **kwargs):
exc = kwargs.get("exc")
print(message % args, file=sys.stderr)
if exc:
print(str(exc))
##########################################################################
# Program arguments #
##########################################################################
# NOTE: types as used in the schema are just the callables
# responsibles for converting strings to python values (when the value
# comes from the config file). They must accept python values as well
# (when the value comes from the defaults). If the value is invalid
# for its domain they must raise a ValueError or TypeError exception.
def boolean(x):
if x in (True, "1", "on", "yes", "true"):
return True
elif x in (False, "0", "off", "no", "false"):
return False
raise ValueError(x)
Option = collections.namedtuple(
"Option",
"config_name, arg_name, default, type",
)
DEFAULTS = [
Option("column", "column", DEF_COLUMN, int),
Option("debug", "debug", False, boolean),
Option("subtotals", "subt", False, boolean),
Option("tab width", "tab_width", DEF_TABSTOP, int),
Option("keep cycles", "no_update", False, boolean),
Option("use tabs", "use_tabs", False, boolean),
]
def get_program_args():
"""Get program arguments.
Main entry point for the config machinery.
Gathers arguments from the ``DEFAULTS`` structure, a config file
and the command line. Returns a ``argparse.Namespace`` object (as
returned by ``argparse.Parser.parse_args``), containing the merged
options.
Values specified in the command line have the highest priority,
then the options specified in the config file and finally the
default values defined by ``DEFAULTS``.
"""
config_file = locate_config_file()
if config_file:
config = load_config_file(config_file, DEFAULTS)
else:
config = {i.config_name: i.default for i in DEFAULTS}
args = parse_command_line(
{i.arg_name: config[i.config_name] for i in DEFAULTS}
)
return args
def load_config_file(config_file, schema):
parser = configparser.ConfigParser()
parser["z80count"] = {i.config_name: i.default for i in schema}
try:
parser.read(config_file)
except configparser.Error as e:
perror("Error parsing config file. Using defaults.", exc=e)
section = parser["z80count"]
res = {}
for opt in schema:
v = section.get(opt.config_name)
try:
v = opt.type(v)
except (ValueError, TypeError) as e:
perror(
"Error parsing config value for '%s'. Using default.",
opt.config_name,
exc=e,
)
v = opt.default
res[opt.config_name] = v
return res
def locate_config_file():
# TODO: check on windows
z80count_rc = os.environ.get("Z80COUNT_RC")
if z80count_rc and os.isfile(z80count_rc):
return z80count_rc
home_dir = os.path.expanduser("~")
# NOTE: The XDG standard states:
#
# $XDG_CONFIG_HOME defines the base directory relative to which
# user specific configuration files should be stored. If
# $XDG_CONFIG_HOME is either not set or empty, a default equal to
# $HOME/.config should be used.
#
# https://specifications.freedesktop.org/basedir-spec/latest/ar01s03.html
xdg_config_home = os.environ.get("XDG_CONFIG_HOME")
if xdg_config_home is None:
xdg_config_home = os.path.join(home_dir, ".config")
candidate = os.path.join(xdg_config_home, DEF_CONFIG_FILE)
if os.path.isfile(candidate):
return candidate
candidate = os.path.join(home_dir, "." + DEF_CONFIG_FILE)
if os.path.isfile(candidate):
return candidate
return None
def parse_command_line(defaults):
parser = argparse.ArgumentParser(
description='Z80 Cycle Count',
epilog="Copyright (C) 2019 Juan J Martinez <jjm@usebox.net>")
parser.add_argument(
"--version", action="version", version="%(prog)s " + version)
parser.add_argument('-d', dest='debug', action='store_true',
help="Enable debug (show the matched case)",
default=defaults["debug"])
parser.add_argument('-s', dest='subt', action='store_true',
help="Include subtotal",
default=defaults["subt"])
parser.add_argument('-n', dest='no_update', action='store_true',
help="Do not update existing count if available",
default=defaults["no_update"])
parser.add_argument('-T', dest='tab_width', type=int,
help="Number of spaces for each tab (default: %d)" % DEF_TABSTOP,
default=defaults["tab_width"])
parser.add_argument('-t', '--use-tabs', dest='use_tabs', action='store_true',
help="Use tabs to align newly added comments (default: use spaces)",
default=defaults["use_tabs"])
parser.add_argument('-c', '--column', dest='column', type=int,
help="Column to align newly added comments (default: %d)" % DEF_COLUMN,
default=defaults["column"])
parser.add_argument(
"infile", nargs="?", type=argparse.FileType('r'), default=sys.stdin,
help="Input file")
parser.add_argument(
"outfile", nargs="?", type=argparse.FileType('w'), default=sys.stdout,
help="Output file")
return parser.parse_args()
##########################################################################
# z80count #
##########################################################################
def z80count(line,
parser,
total,
subt,
no_update,
column=50,
use_tabs=False,
tab_width=8,
debug=False,
):
out = line.rstrip() + "\n"
entry = parser.lookup(line)
if entry:
total, total_cond = update_counters(entry, total)
out = format_line(
line, entry, total, total_cond, subt, update=not no_update,
column=column, debug=debug, use_tabs=use_tabs,
tab_width=tab_width,
)
return (out, total)
def update_counters(entry, total):
if entry["_t_states_met"]:
total_cond = total + entry["_t_states_met"]
else:
total_cond = 0
total = total + entry["_t_states_or_not_met"]
return (total, total_cond)
def format_line(line, entry, total, total_cond, subt, update, column,
debug, use_tabs, tab_width):
cycles = entry["cycles"]
line = line.rstrip().rsplit(";", 1)
comment = "; [%s" % cycles
if subt:
if total_cond:
comment += " .. %d/%d]" % (total_cond, total)
else:
comment += " .. %d]" % total
else:
comment += "]"
if debug:
comment += " case{%s}" % entry["case"]
if len(line) == 1:
comment = comment_alignment(line[0], column, use_tabs, tab_width) + comment
out = line[0] + comment
if len(line) > 1:
if update:
m = OUR_COMMENT.search(line[1])
if m:
line[1] = line[1].replace(m.group(0), "")
out += " "
out += line[1].lstrip()
out += "\n"
return out
def comment_alignment(line, column, use_tabs=False, tab_width=8):
"""Calculate the spacing required for comment alignment.
:param str line: code line
:param int column: column in which we want the comment to start
:param bool use_tabs: use tabs instead of spaces
:param int tab_width: tab width
:returns: the spacing
:rtype: str
"""
expected_length = column - 1
length = line_length(line, tab_width)
if length >= expected_length:
return " " # add an space before the colon
if use_tabs:
tab_stop = (expected_length // tab_width) * tab_width + 1
if tab_stop > length:
extra_tabs = (tab_stop - length) // tab_width
if length % tab_width > 1:
extra_tabs += 1 # complete partial tab
extra_spaces = expected_length - tab_stop
else:
extra_tabs = 0
extra_spaces = expected_length - length
else:
extra_tabs = 0
extra_spaces = expected_length - length
return "\t" * extra_tabs + " " * extra_spaces
def line_length(line, tab_width):
"""Calculate the length of a line taking TABs into account.
:param str line: line of code
:param int tab_width: tab width
:returns: The length of the line
:rtype: int
"""
length = 0
for i in line:
if i == "\t":
length = ((length + tab_width) // tab_width) * tab_width
else:
length += 1
return length
class Parser(object):
"""Simple parser based on a table of regexes."""
# [label:] OPERATOR [OPERANDS] [; comment]
_LINE_RE = re.compile(r"^([$.\w]+:)?\s*(?P<operator>\w+)(?P<rest>\s+.*)?$")
def __init__(self):
self._table = self._load_table()
def lookup(self, line):
mnemo = self._extract_mnemonic(line)
line = self._remove_label(line)
if mnemo is None or mnemo not in self._table:
return None
for entry in self._table[mnemo]:
if "_initialized" not in entry:
self._init_entry(entry)
if entry["cregex"].search(line):
return entry
return None
@classmethod
def _load_table(cls):
table_file = path.join(
path.dirname(path.realpath(__file__)), "z80table.json")
with open(table_file, "rt") as fd:
table = json.load(fd)
table.sort(key=lambda o: o["w"])
res = {}
for i in table:
mnemo = cls._extract_mnemonic(i["case"])
assert mnemo is not None
if mnemo not in res:
res[mnemo] = []
res[mnemo].append(i)
return res
@classmethod
def _extract_mnemonic(cls, line):
match = cls._LINE_RE.match(line)
if match:
return match.group("operator").upper()
return None
@classmethod
def _remove_label(cls, line):
match = cls._LINE_RE.match(line)
if match:
rest = match.group("rest") or ""
return match.group("operator") + rest
return None
@staticmethod
def _init_entry(entry):
entry["cregex"] = re.compile(r"^\s*" + entry["regex"] + r"\s*(;.*)?$", re.I)
cycles = entry["cycles"]
if "/" in cycles:
c = cycles.split("/")
t_states_or_not_met = int(c[1])
t_states_met = int(c[0])
else:
t_states_or_not_met = int(cycles)
t_states_met = 0
entry["_t_states_or_not_met"] = t_states_or_not_met
entry["_t_states_met"] = t_states_met
entry["_initialized"] = True
def main():
args = get_program_args()
in_f = args.infile
out_f = args.outfile
parser = Parser()
total = 0
for line in in_f:
output, total = z80count(
line, parser, total, args.subt, args.no_update,
args.column, args.use_tabs, args.tab_width,
args.debug,
)
out_f.write(output)
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