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https://git.code.sf.net/p/quake/quakeforge
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7ef4c2776e
Detect assignments to initialized globals and give an error, unless the --cow (copy on write) option is given, and then allocate a new global for the var, clear its initialized flag. Relocate all globals.
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/* Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(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. See the
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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 the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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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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#include "QF/hash.h"
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#include "qfcc.h"
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static hashtab_t *string_imm_defs;
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static hashtab_t *float_imm_defs;
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static hashtab_t *vector_imm_defs;
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static const char *
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string_imm_get_key (void *_def, void *unused)
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{
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def_t *def = (def_t*)_def;
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return G_STRING (def->ofs);
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}
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static const char *
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float_imm_get_key (void *_def, void *unused)
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{
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def_t *def = (def_t*)_def;
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static char rep[20];
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sprintf (rep, "\001float:%08X\001", G_INT(def->ofs));
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return rep;
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}
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static const char *
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vector_imm_get_key (void *_def, void *unused)
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{
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def_t *def = (def_t*)_def;
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static char rep[60];
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sprintf (rep, "\001vector:%08X\001%08X\001%08X\001",
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G_INT(def->ofs), G_INT(def->ofs+1), G_INT(def->ofs+2));
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return rep;
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}
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/*
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PR_ParseImmediate
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Looks for a preexisting constant
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*/
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def_t *
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PR_ParseImmediate (def_t *def)
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{
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def_t *cn = 0;
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char rep[60];
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hashtab_t *tab = 0;
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if (!string_imm_defs) {
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string_imm_defs = Hash_NewTable (16381, string_imm_get_key, 0, 0);
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float_imm_defs = Hash_NewTable (16381, float_imm_get_key, 0, 0);
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vector_imm_defs = Hash_NewTable (16381, vector_imm_get_key, 0, 0);
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}
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if (def && def->type != pr_immediate_type) {
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PR_ParseError ("immediate type missmatch");
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}
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if (pr_immediate_type == &type_string) {
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cn = (def_t*) Hash_Find (string_imm_defs, pr_immediate_string);
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tab = string_imm_defs;
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//printf ("%s\n",pr_immediate_string);
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} else if (pr_immediate_type == &type_float) {
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sprintf (rep, "\001float:%08X\001", *(int*)&pr_immediate._float);
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cn = (def_t*) Hash_Find (float_imm_defs, rep);
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tab = float_imm_defs;
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//printf ("%f\n",pr_immediate._float);
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} else if (pr_immediate_type == &type_vector) {
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sprintf (rep, "\001vector:%08X\001%08X\001%08X\001",
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*(int*)&pr_immediate.vector[0],
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*(int*)&pr_immediate.vector[1],
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*(int*)&pr_immediate.vector[2]);
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cn = (def_t*) Hash_Find (vector_imm_defs, rep);
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tab = vector_imm_defs;
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//printf ("%f %f %f\n",pr_immediate.vector[0], pr_immediate.vector[1], pr_immediate.vector[2]);
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} else {
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PR_ParseError ("weird immediate type");
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}
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if (cn) {
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if (cn->type != pr_immediate_type)
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printf("urk\n");
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//printf("found\n");
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if (def) {
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PR_FreeLocation (def);
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def->ofs = cn->ofs;
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def->initialized = 1;
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cn = def;
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}
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PR_Lex ();
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return cn;
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}
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// allocate a new one
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// always share immediates
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if (def) {
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cn = def;
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} else {
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cn = PR_NewDef (pr_immediate_type, "IMMEDIATE", 0);
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cn->ofs = PR_NewLocation (pr_immediate_type);
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pr_global_defs[cn->ofs] = cn;
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}
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cn->initialized = 1;
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// copy the immediate to the global area
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if (pr_immediate_type == &type_string)
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pr_immediate.string = CopyString (pr_immediate_string);
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memcpy (pr_globals + cn->ofs, &pr_immediate,
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4 * type_size[pr_immediate_type->type]);
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Hash_Add (tab, cn);
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PR_Lex ();
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return cn;
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}
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