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https://git.code.sf.net/p/quake/quakeforge
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6d5e8922a5
I never liked the various hacks I had come up with for representing resource handles in Ruamoko. Structs with an int were awkward to test, pointers and ints could be modified, etc etc. The new @handle keyword (@ used to keep handle free for use) works just like struct, union and enum in syntax, but creates an opaque type suitable for a 32-bit handle. The backing type is a function so v6 progs can use it without (all the necessary opcodes exist) and no modifications were needed for type-checking in binary expressions, but only assignment and comparisons are supported, and (of course) nil. Tested using cbuf_t and QFile: seems to work as desired. I had considered 64-bit handles, but really, if more than 4G resource objects are needed, I'm not sure QF can handle the game. However, that limit is per resource manager, not total.
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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struct.h
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structure support
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2001/12/08
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef __struct_h
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#define __struct_h
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struct def_s;
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enum storage_class_e;
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struct symbol_s;
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struct symtab_s;
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struct type_s;
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typedef struct {
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const char *name;
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struct type_s *type;
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void (*emit) (struct def_s *def, void *data, int index);
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} struct_def_t;
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struct symbol_s *find_handle (struct symbol_s *tag, struct type_s *type);
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struct symtab_s *start_struct (int *su, struct symbol_s *tag,
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struct symtab_s *parent);
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struct symbol_s *find_struct (int su, struct symbol_s *tag,
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struct type_s *type);
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struct symbol_s *build_struct (int su, struct symbol_s *tag,
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struct symtab_s *symtab, struct type_s *type,
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int base);
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struct symbol_s *find_enum (struct symbol_s *tag);
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struct symtab_s *start_enum (struct symbol_s *enm);
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struct symbol_s *finish_enum (struct symbol_s *sym);
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void add_enum (struct symbol_s *enm, struct symbol_s *name,
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struct expr_s *val);
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int enum_as_bool (struct type_s *enm, struct expr_s **zero,
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struct expr_s **one);
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struct symbol_s *make_structure (const char *name, int su, struct_def_t *defs,
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struct type_s *type);
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struct def_s * emit_structure (const char *name, int su, struct_def_t *defs,
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struct type_s *type, void *data,
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struct defspace_s *space,
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enum storage_class_e storage);
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#endif//__struct_h
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