mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-26 14:20:59 +00:00
12c84046f3
This is an extremely extensive patch as it hits every cvar, and every usage of the cvars. Cvars no longer store the value they control, instead, they use a cexpr value object to reference the value and specify the value's type (currently, a null type is used for strings). Non-string cvars are passed through cexpr, allowing expressions in the cvars' settings. Also, cvars have returned to an enhanced version of the original (id quake) registration scheme. As a minor benefit, relevant code having direct access to the cvar-controlled variables is probably a slight optimization as it removed a pointer dereference, and the variables can be located for data locality. The static cvar descriptors are made private as an additional safety layer, though there's nothing stopping external modification via Cvar_FindVar (which is needed for adding listeners). While not used yet (partly due to working out the design), cvars can have a validation function. Registering a cvar allows a primary listener (and its data) to be specified: it will always be called first when the cvar is modified. The combination of proper listeners and direct access to the controlled variable greatly simplifies the more complex cvar interactions as much less null checking is required, and there's no need for one cvar's callback to call another's. nq-x11 is known to work at least well enough for the demos. More testing will come.
335 lines
12 KiB
Python
335 lines
12 KiB
Python
import re
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import sys
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from pprint import pprint
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from io import StringIO
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from textwrap import TextWrapper
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import os
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STRING = r'\s*"((\\.|[^"\\])*)"\s*'
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QSTRING = r'\s*("(\\.|[^"\\])*")\s*'
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ID = r'([a-zA-Z_][a-zA-Z_0-9]*)'
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STORE = r'(VISIBLE\s+|static\s+|extern\s+|)'
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FIELD = r'(string|value|int_val|vec)\b'
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FLAGS = r'\s*(' + ID + r'\s*(\|\s*' + ID + r')*)\s*'
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TYPE = r'(cvar_t|struct cvar_s)\s*\*'
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STUFF = r'\s*(.*)\s*'
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cvar_decl_re = re.compile(r'^' + STORE + TYPE + ID + r';.*')
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cvar_get_re = re.compile(r'.*\bCvar_Get\s*\(\s*"')
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cvar_get_join_prev_re = re.compile(r'^\s*Cvar_Get\s*\(\s*".*')
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cvar_get_assign_re = re.compile(r'\s*' + ID + r'\s*=\s*$')
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cvar_get_incomplete_re = re.compile(r'.*Cvar_Get\s*\(\s*"[^;]*$')
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cvar_get_complete_re = re.compile(r'.*Cvar_Get\s*\(\s*".*\);.*$')
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cvar_create_re = re.compile(r'\s*(\w+)\s*=\s*Cvar_Get\s*\('
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+ STRING
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+ ',(' + STRING + '|\s*(.*)\s*),' + FLAGS + r',\s*([^,]+),\s*' + STUFF + r'\);.*')
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cvar_use_re = re.compile(ID + r'\s*\->\s*' + FIELD)
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cvar_listener_re = re.compile(ID + r'\s*\(\s*cvar_t\s*\*' + ID + '\s*\)\s*')
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string_or_id_re = re.compile(f'({ID}|{QSTRING})')
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cvar_setrom_re = re.compile(r'\s*Cvar_SetFlags\s*\(\s*' + ID + '.*CVAR_ROM\);.*')
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id_re = re.compile(f'\\b{ID}\\b')
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#cvar_decl_re = re.compile(r'^cvar_t\s+(\w+)\s*=\s*\{\s*("[^"]*")\s*,\s*("[^"]*")(\s*,\s*(\w+)(\s*,\s*(\w+))?)?\s*\}\s*;(\s*//\s*(.*))?\n')
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cvar_set_re = re.compile(r'^(\s+)(Cvar_Set|Cvar_SetValue)\s*\(' + ID + ',\s*(.*)\);(.*)')
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wrapper = TextWrapper(width = 69, drop_whitespace = False,
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break_long_words = False)
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class cvar:
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def __init__(self, c_name, name, default, flags, callback, description):
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self.c_name = c_name
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self.name = name
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self.default = default
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self.flags = flags
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if callback in ['NULL', '0']:
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callback = 0
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self.callback = callback
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if description in ['NULL', '0', '']:
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description = 'FIXME no description'
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self.desc = description
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if self.desc==None:
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self.desc = 'None'
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self.data = 0
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self.files = []
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self.type = None
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self.c_type = None
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self.used_field = None
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self.uses = []
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def guess_type(self):
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if self.used_field == "value":
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self.type = "&cexpr_float"
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self.c_type = "float "
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elif self.used_field == "int_val":
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self.type = "&cexpr_int"
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self.c_type = "int "
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elif self.used_field == "vec":
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self.type = "&cexpr_vector"
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self.c_type = "vec4f_t "
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elif self.used_field == "string":
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self.type = 0
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self.c_type = "char *"
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else:
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self.type = "0/* not used */"
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self.c_type = "char *"
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def add_file(self, file, line):
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self.files.append((file, line))
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def add_use(self, field, file, line):
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if self.used_field and self.used_field != field:
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print(f"{file}:{line}: cvar {self.name} used inconsistently")
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self.used_field = field
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self.uses.append((field, file, line))
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def __repr__(self):
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return f"cvar(({self.c_name}, {self.name}, {self.default}, {self.flags}, {self.callback}, {self.desc})"
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def __str__(self):
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return self.__repr__()
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def struct(self):
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A = [
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f'static cvar_t {self.c_name}_cvar = {{\n',
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f'\t.name = "{self.name}",\n',
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f'\t.description =\n',
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]
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B = [
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f'\t.default_value = "{self.default}",\n',
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f'\t.flags = {self.flags},\n',
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f'\t.value = {{ .type = {self.type}, .value = &{self.c_name} }},\n',
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f'}};\n',
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]
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desc = []
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dstrings = [m[0].strip() for m in string_or_id_re.findall(self.desc)]
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def wrap(string, comma = ""):
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if string[0] == '"' and string != '""':
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string = string[1:-1]
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dlines = wrapper.wrap(string)
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desc.extend([f'\t\t"{l}"\n' for l in dlines[:-1]])
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desc.append(f'\t\t"{dlines[-1]}"{comma}\n')
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else:
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desc.append(f'\t\t{string}{comma}\n')
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for dstring in dstrings[:-1]:
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wrap (dstring)
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wrap(dstrings[-1], ",")
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return A + desc + B
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def var(self, storage):
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if storage:
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storage += " "
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return [f'{storage}{self.c_type}{self.c_name};\n']
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def set_rom(self):
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if self.flags == 'CVAR_NONE':
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self.flags = 'CVAR_ROM'
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else:
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self.flags = '|'.join([self.flags, 'CVAR_ROM'])
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def register(self):
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return [f'\tCvar_Register (&{self.c_name}_cvar, {self.callback}, {self.data});\n']
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cvar_decls = {}
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cvar_dict = {}
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cvar_sets = []
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cvar_rom = set()
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cvar_listeners = {}
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cvar_listeners_done = set()
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cvar_listeners_multi = set()
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files = {}
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modified = set()
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cvar_struct = [
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"\tconst char *name;\n",
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"\tconst char *description;\n",
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"\tconst char *default_value;\n",
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"\tunsigned flags;\n",
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"\texprval_t value;\n",
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"\tint (*validator) (const struct cvar_s *var);\n"
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"\tstruct cvar_listener_set_s *listeners;\n"
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"\tstruct cvar_s *next;\n"
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]
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cvar_reg = "void Cvar_Register (cvar_t *var, cvar_listener_t listener, void *data);\n"
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cvar_cexpr = '#include "QF/cexpr.h"\n'
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cvar_set = 'void Cvar_Set (const char *var, const char *value);\n'
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cvar_setvar = 'void Cvar_SetVar (cvar_t *var, const char *value);\n'
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cvar_info = 'struct cvar_s;\nvoid Cvar_Info (void *data, const struct cvar_s *cvar);\n'
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nq_cl_cvar_info = 'nq/include/client.h'
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nq_sv_cvar_info = 'nq/include/server.h'
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qw_cl_cvar_info = 'qw/include/client.h'
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qw_sv_cvar_info = 'qw/include/server.h'
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cvar_file = "include/QF/cvar.h"
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line_substitutions = [
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(cvar_file, (40, 60), cvar_struct),
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(cvar_file, (96, 100), cvar_reg),
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(cvar_file, (35, 35), cvar_cexpr),
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(cvar_file, (109, 110), cvar_set),
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(cvar_file, (110, 111), cvar_setvar),
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(nq_cl_cvar_info, (294,295), cvar_info),
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(nq_sv_cvar_info, (300,301), cvar_info),
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(qw_cl_cvar_info, (296,297), cvar_info),
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(qw_sv_cvar_info, (634,635), cvar_info),
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]
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def get_cvar_defs(fname):
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fi = open(fname,'rt')
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f = files[fname] = fi.readlines()
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i = 0
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while i < len(f):
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cr = cvar_setrom_re.match(f[i])
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if cr:
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cvar_rom.add(cr[1])
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del(f[i])
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continue
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if cvar_get_join_prev_re.match(f[i]):
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if cvar_get_assign_re.match(f[i - 1]):
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f[i - 1] = f"{f[i - 1].rstrip()} {f[i].lstrip()}"
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del(f[i])
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i -= 1
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if cvar_get_incomplete_re.match(f[i]):
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while not cvar_get_complete_re.match(f[i]):
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f[i + 1] = f[i + 1].lstrip()
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f[i] = f[i].rstrip()
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if f[i][-1] == '"' and f[i + 1][0] == '"':
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#string concatentation
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f[i] = f[i][:-1] + f[i + 1][1:]
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else:
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f[i] = f"{f[i]} {f[i + 1]}"
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del(f[i + 1])
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cd = cvar_decl_re.match(f[i])
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if cd:
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if cd[3] not in cvar_decls:
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cvar_decls[cd[3]] = []
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cvar_decls[cd[3]].append((fname, i))
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cl = cvar_listener_re.match(f[i])
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if cl:
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if cl[1] not in cvar_listeners:
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cvar_listeners[cl[1]] = []
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cvar_listeners[cl[1]].append((fname, i, cl[2]))
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cc = cvar_create_re.match(f[i])
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if cc:
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if cc.group(7):
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default = 7
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else:
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default = 5
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cc = cc.group(1, 2, default, 8, 12, 13)
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if cc[0] not in cvar_dict:
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cvar_dict[cc[0]] = cvar(*cc)
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cvar_dict[cc[0]].add_file(fname, i)
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cs = cvar_set_re.match(f[i])
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if cs:
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cvar_sets.append((fname, i))
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i += 1
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fi.close()
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for f in sys.argv[1:]:
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get_cvar_defs(f)
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#for cv in cvar_decls.keys():
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# if cv not in cvar_dict:
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# print(f"cvar {cv} declared but never created")
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for file in files.items():
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fname,f = file
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for i in range(len(f)):
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for use in cvar_use_re.finditer(f[i]):
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if use[1] in cvar_dict and cvar_dict[use[1]]:
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cvar_dict[use[1]].add_use(use[2], fname, i)
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keys = list(cvar_dict.keys())
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for cv in keys:
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var = cvar_dict[cv]
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if cv not in cvar_decls or var.callback not in cvar_listeners:
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continue
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if var.callback in cvar_listeners:
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if var.callback in cvar_listeners_done:
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if not var.callback in cvar_listeners_multi:
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print(f"WARNING: {var.callback} has multiple uses")
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cvar_listeners_multi.add (var.callback)
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else:
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cvar_listeners_done.add (var.callback);
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cvar_listeners_done.clear()
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for cv in keys:
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var = cvar_dict[cv]
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var.guess_type()
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if var.c_name in cvar_rom:
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print(var.c_name, 'rom')
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var.set_rom()
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if cv in cvar_decls:
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if var.callback in cvar_listeners_multi:
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var.data = f'&{var.c_name}'
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for d in cvar_decls[cv]:
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decl = cvar_decl_re.match(files[d[0]][d[1]])
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storage = decl[1].strip()
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if storage == "extern":
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subst = var.var(storage)
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else:
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subst = var.var(storage)+var.struct()
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line_substitutions.append((d[0], (d[1], d[1] + 1), subst))
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for c in var.files:
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line_substitutions.append((c[0], (c[1], c[1] + 1), var.register()))
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for u in var.uses:
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# use substitutions are done immediately because they never
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# change the number of lines
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field, fname, line = u
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file = files[fname]
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places = []
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for use in cvar_use_re.finditer(file[line]):
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cv, field = use.group(1, 2)
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if cv == var.c_name:
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places.append((use.start(), use.end()))
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places.reverse()
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for p in places:
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file[line] = file[line][:p[0]] + var.c_name + file[line][p[1]:]
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modified.add(fname)
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else:
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#for f in cvar_dict[cv].files:
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# print(f"{f[0]}:{f[1]}: {cv} created but not kept")
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pass
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for cv in keys:
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var = cvar_dict[cv]
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if cv not in cvar_decls or var.callback not in cvar_listeners:
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continue
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if var.callback in cvar_listeners_done:
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continue
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for listener in cvar_listeners[var.callback]:
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fname, line, c_name = listener
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file = files[fname]
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file[line] = f"{var.callback} (void *data," " const cvar_t *cvar)\n"
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modified.add(fname)
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cvar_listeners_done.add (var.callback);
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multi = var.callback in cvar_listeners_multi
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line += 1
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while line < len(file) and file[line] != '}\n':
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line += 1
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places = []
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for use in cvar_use_re.finditer(file[line]):
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cv, field = use.group(1, 2)
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if cv == c_name:
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subst = f'*({var.c_type}*)data' if multi else var.c_name
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places.append((use.start(), use.end(), subst))
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places.reverse()
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for p in places:
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file[line] = file[line][:p[0]] + p[2] + file[line][p[1]:]
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modified.add(fname)
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places = []
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for v in id_re.finditer(file[line]):
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if v[1] == c_name:
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places.append((v.start(), v.end(), "cvar"))
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for p in places:
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file[line] = file[line][:p[0]] + p[2] + file[line][p[1]:]
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modified.add(fname)
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for s in cvar_sets:
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cs = cvar_set_re.match(files[s[0]][s[1]])
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subst = None
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val = cs[4]
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if cs[2] == "Cvar_SetValue" and cs[3] in cvar_dict:
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if val[0] == '(':
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#strip off a cast
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val = val[val.index(')') + 1:].strip()
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subst = f'{cs[1]}{cs[3]} = {val};{cs[5]}\n'
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elif cs[2] == "Cvar_Set" and cs[3] in cvar_dict:
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subst = f'{cs[1]}{cs[2]} ("{cvar_dict[cs[3]].name}", {val});{cs[5]}\n'
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elif cs[2] == "Cvar_Set":
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subst = f'{cs[1]}Cvar_SetVar ({cs[3]}, {val});{cs[5]}\n'
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if subst:
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line_substitutions.append((s[0], (s[1], s[1] + 1), subst))
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line_substitutions.sort(reverse=True, key=lambda s: s[1][1])
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for substitution in line_substitutions:
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file, lines, subst = substitution
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modified.add(file)
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files[file][lines[0]:lines[1]] = subst
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for f in files.keys():
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if f in modified:
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file = open(f, "wt")
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file.writelines(files[f])
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file.close ()
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