mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 08:50:58 +00:00
6d62e91ce7
pr_type_t now contains only the one "value" field, and all the access macros now use their PACKED variant for base access, making access to larger types more consistent with the smaller types.
384 lines
9.9 KiB
C
384 lines
9.9 KiB
C
/*
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struct.c
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structure support
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Copyright (C) 2011 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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Date: 2011/01/17
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include <QF/dstring.h>
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#include <QF/hash.h>
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#include <QF/sys.h>
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#include <QF/va.h>
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#include <QF/progs/pr_obj.h>
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#include "tools/qfcc/include/class.h"
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#include "tools/qfcc/include/def.h"
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#include "tools/qfcc/include/defspace.h"
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#include "tools/qfcc/include/diagnostic.h"
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#include "tools/qfcc/include/emit.h"
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#include "tools/qfcc/include/expr.h"
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#include "tools/qfcc/include/obj_type.h"
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#include "tools/qfcc/include/qfcc.h"
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#include "tools/qfcc/include/reloc.h"
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#include "tools/qfcc/include/shared.h"
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#include "tools/qfcc/include/strpool.h"
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#include "tools/qfcc/include/struct.h"
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#include "tools/qfcc/include/symtab.h"
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#include "tools/qfcc/include/type.h"
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#include "tools/qfcc/include/value.h"
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static symbol_t *
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find_tag (ty_meta_e meta, symbol_t *tag, type_t *type)
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{
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const char *tag_name;
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symbol_t *sym;
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if (tag) {
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tag_name = va (0, "tag %s", tag->name);
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} else {
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const char *path = GETSTR (pr.source_file);
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const char *file = strrchr (path, '/');
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if (!file++)
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file = path;
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tag_name = va (0, "tag .%s.%d", file, pr.source_line);
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}
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sym = symtab_lookup (current_symtab, tag_name);
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if (sym) {
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if (sym->table == current_symtab && sym->type->meta != meta)
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error (0, "%s defined as wrong kind of tag", tag->name);
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if (sym->type->meta == meta)
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return sym;
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}
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sym = new_symbol (tag_name);
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if (!type)
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type = new_type ();
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if (!type->name)
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type->name = sym->name;
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sym->type = type;
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sym->type->type = ev_invalid;
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sym->type->meta = meta;
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sym->sy_type = sy_type;
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return sym;
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}
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symbol_t *
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find_struct (int su, symbol_t *tag, type_t *type)
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{
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ty_meta_e meta = ty_struct;
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if (su == 'u')
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meta = ty_union;
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return find_tag (meta, tag, type);
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}
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symbol_t *
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build_struct (int su, symbol_t *tag, symtab_t *symtab, type_t *type)
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{
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symbol_t *sym = find_struct (su, tag, type);
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symbol_t *s;
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int alignment = 1;
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symbol_t *as;
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symtab->parent = 0; // disconnect struct's symtab from parent scope
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if (sym->table == current_symtab && sym->type->t.symtab) {
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error (0, "%s defined as wrong kind of tag", tag->name);
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return sym;
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}
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for (s = symtab->symbols; s; s = s->next) {
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if (s->sy_type != sy_var)
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continue;
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if (is_class (s->type)) {
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error (0, "statically allocated instance of class %s",
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s->type->t.class->name);
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}
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if (su == 's') {
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symtab->size = RUP (symtab->size, s->type->alignment);
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s->s.offset = symtab->size;
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symtab->size += type_size (s->type);
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} else {
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int size = type_size (s->type);
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if (size > symtab->size)
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symtab->size = size;
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}
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if (s->type->alignment > alignment) {
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alignment = s->type->alignment;
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}
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if (s->visibility == vis_anonymous) {
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symtab_t *anonymous;
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symbol_t *t = s->next;
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int offset = s->s.offset;
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if (!is_struct (s->type)) {
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internal_error (0, "non-struct/union anonymous field");
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}
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anonymous = s->type->t.symtab;
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for (as = anonymous->symbols; as; as = as->next) {
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if (as->visibility == vis_anonymous || as->sy_type!= sy_var) {
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continue;
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}
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if (Hash_Find (symtab->tab, as->name)) {
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error (0, "ambiguous field `%s' in anonymous %s",
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as->name, su == 's' ? "struct" : "union");
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} else {
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s->next = copy_symbol (as);
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s = s->next;
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s->s.offset += offset;
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s->table = symtab;
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Hash_Add (symtab->tab, s);
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}
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}
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s->next = t;
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}
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}
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if (!type)
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sym->type = find_type (sym->type); // checks the tag, not the symtab
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sym->type->t.symtab = symtab;
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if (alignment > sym->type->alignment) {
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sym->type->alignment = alignment;
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}
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if (!type && sym->type->type_def->external) //FIXME should not be necessary
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sym->type->type_def = qfo_encode_type (sym->type, pr.type_data);
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return sym;
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}
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symbol_t *
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find_enum (symbol_t *tag)
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{
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return find_tag (ty_enum, tag, 0);
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}
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symtab_t *
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start_enum (symbol_t *sym)
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{
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if (sym->table == current_symtab && sym->type->t.symtab) {
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error (0, "%s defined as wrong kind of tag", sym->name);
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sym = find_enum (0);
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}
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sym->type->t.symtab = new_symtab (current_symtab, stab_local);
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sym->type->alignment = 1;
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sym->type->width = 1;
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return sym->type->t.symtab;
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}
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symbol_t *
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finish_enum (symbol_t *sym)
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{
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symbol_t *enum_sym;
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symbol_t *name;
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type_t *enum_type;
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symtab_t *enum_tab;
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enum_type = sym->type = find_type (sym->type);
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enum_tab = enum_type->t.symtab;
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for (name = enum_tab->symbols; name; name = name->next) {
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name->type = sym->type;
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enum_sym = new_symbol_type (name->name, enum_type);
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enum_sym->sy_type = sy_const;
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enum_sym->s.value = name->s.value;
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symtab_addsymbol (enum_tab->parent, enum_sym);
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}
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return sym;
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}
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void
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add_enum (symbol_t *enm, symbol_t *name, expr_t *val)
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{
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type_t *enum_type = enm->type;
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symtab_t *enum_tab = enum_type->t.symtab;
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int value;
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if (name->table == current_symtab || name->table == enum_tab)
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error (0, "%s redefined", name->name);
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if (name->table)
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name = new_symbol (name->name);
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name->sy_type = sy_const;
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name->type = enum_type;
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value = 0;
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if (enum_tab->symbols)
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value = ((symbol_t *)(enum_tab->symtail))->s.value->v.int_val + 1;
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if (val) {
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convert_name (val);
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if (!is_constant (val))
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error (val, "non-constant initializer");
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else if (!is_int_val (val))
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error (val, "invalid initializer type");
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else
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value = expr_int (val);
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}
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name->s.value = new_int_val (value);
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symtab_addsymbol (enum_tab, name);
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}
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int
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enum_as_bool (type_t *enm, expr_t **zero, expr_t **one)
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{
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symtab_t *symtab = enm->t.symtab;
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symbol_t *zero_sym = 0;
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symbol_t *one_sym = 0;
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symbol_t *sym;
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int val, v;
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if (!symtab)
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return 0;
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for (sym = symtab->symbols; sym; sym = sym->next) {
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if (sym->sy_type != sy_const)
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continue;
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val = sym->s.value->v.int_val;
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if (!val) {
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zero_sym = sym;
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} else {
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if (one_sym) {
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v = one_sym->s.value->v.int_val;
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if (val * val > v * v)
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continue;
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}
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one_sym = sym;
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}
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}
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if (!zero_sym || !one_sym)
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return 0;
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*zero = new_symbol_expr (zero_sym);
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*one = new_symbol_expr (one_sym);
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return 1;
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}
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symbol_t *
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make_structure (const char *name, int su, struct_def_t *defs, type_t *type)
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{
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symtab_t *strct;
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symbol_t *field;
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symbol_t *sym = 0;
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if (name)
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sym = new_symbol (name);
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if (su == 'u')
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strct = new_symtab (0, stab_union);
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else
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strct = new_symtab (0, stab_struct);
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while (defs->name) {
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field = new_symbol_type (defs->name, defs->type);
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field->sy_type = sy_var;
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if (!symtab_addsymbol (strct, field))
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internal_error (0, "duplicate symbol: %s", defs->name);
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defs++;
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}
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sym = build_struct (su, sym, strct, type);
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return sym;
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}
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def_t *
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emit_structure (const char *name, int su, struct_def_t *defs, type_t *type,
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void *data, defspace_t *space, storage_class_t storage)
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{
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int i, j;
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int saw_null = 0;
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int saw_func = 0;
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symbol_t *struct_sym;
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symbol_t *field_sym;
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def_t *struct_def;
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def_t field_def;
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name = save_string (name);
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if (!type)
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type = make_structure (0, su, defs, 0)->type;
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if (!is_struct (type) || (su == 's' && type->meta != ty_struct)
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|| (su == 'u' && type->meta != ty_union))
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internal_error (0, "structure %s type mismatch", name);
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for (i = 0, field_sym = type->t.symtab->symbols; field_sym;
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i++, field_sym = field_sym->next) {
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if (!defs[i].name)
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internal_error (0, "structure %s unexpected end of defs", name);
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if (field_sym->type != defs[i].type)
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internal_error (0, "structure %s.%s field type mismatch", name,
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defs[i].name);
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if ((!defs[i].emit && saw_func) || (defs[i].emit && saw_null))
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internal_error (0, "structure %s mixed emit/copy", name);
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if (!defs[i].emit)
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saw_null = 1;
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if (defs[i].emit)
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saw_func = 1;
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}
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if (defs[i].name)
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internal_error (0, "structure %s too many defs", name);
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if (storage != sc_global && storage != sc_static)
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internal_error (0, "structure %s must be global or static", name);
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if (!space) {
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space = pr.far_data;
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}
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struct_sym = make_symbol (name, type, space, storage);
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struct_def = struct_sym->s.def;
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if (struct_def->initialized)
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internal_error (0, "structure %s already initialized", name);
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struct_def->initialized = struct_def->constant = 1;
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struct_def->nosave = 1;
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for (i = 0, field_sym = type->t.symtab->symbols; field_sym;
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i++, field_sym = field_sym->next) {
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field_def.type = field_sym->type;
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field_def.name = save_string (va (0, "%s.%s", name, field_sym->name));
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field_def.space = struct_def->space;
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field_def.offset = struct_def->offset + field_sym->s.offset;
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if (!defs[i].emit) {
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//FIXME relocs? arrays? structs?
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pr_type_t *val = (pr_type_t *) data;
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memcpy (D_POINTER (pr_type_t, &field_def), val,
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type_size (field_def.type) * sizeof (pr_type_t));
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data = &val[type_size (field_def.type)];
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} else {
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if (is_array (field_def.type)) {
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type_t *type = field_def.type->t.array.type;
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for (j = 0; j < field_def.type->t.array.size; j++) {
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defs[i].emit (&field_def, data, j);
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field_def.offset += type_size (type);
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}
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} else {
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defs[i].emit (&field_def, data, 0);
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}
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}
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}
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return struct_def;
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}
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