quakeforge/tools/qfcc/source/pr_imm.c

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/* Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
See file, 'COPYING', for details.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "QF/hash.h"
#include "qfcc.h"
static hashtab_t *string_imm_defs;
static hashtab_t *float_imm_defs;
static hashtab_t *vector_imm_defs;
static char *
string_imm_get_key (void *_def, void *unused)
{
def_t *def = (def_t*)_def;
return G_STRING (def->ofs);
}
static char *
float_imm_get_key (void *_def, void *unused)
{
def_t *def = (def_t*)_def;
static char rep[20];
sprintf (rep, "\001float:%08X\001", G_INT(def->ofs));
return rep;
}
static char *
vector_imm_get_key (void *_def, void *unused)
{
def_t *def = (def_t*)_def;
static char rep[60];
sprintf (rep, "\001vector:%08X\001%08X\001%08X\001",
G_INT(def->ofs), G_INT(def->ofs+1), G_INT(def->ofs+2));
return rep;
}
/*
PR_ParseImmediate
Looks for a preexisting constant
*/
def_t *
PR_ParseImmediate (def_t *def)
{
def_t *cn = 0;
char rep[60];
hashtab_t *tab = 0;
if (!string_imm_defs) {
string_imm_defs = Hash_NewTable (16381, string_imm_get_key, 0, 0);
float_imm_defs = Hash_NewTable (16381, float_imm_get_key, 0, 0);
vector_imm_defs = Hash_NewTable (16381, vector_imm_get_key, 0, 0);
}
if (pr_immediate_type == &type_string) {
cn = (def_t*) Hash_Find (string_imm_defs, pr_immediate_string);
tab = string_imm_defs;
//printf ("%s\n",pr_immediate_string);
} else if (pr_immediate_type == &type_float) {
sprintf (rep, "\001float:%08X\001", *(int*)&pr_immediate._float);
cn = (def_t*) Hash_Find (float_imm_defs, rep);
tab = float_imm_defs;
//printf ("%f\n",pr_immediate._float);
} else if (pr_immediate_type == &type_vector) {
sprintf (rep, "\001vector:%08X\001%08X\001%08X\001",
*(int*)&pr_immediate.vector[0],
*(int*)&pr_immediate.vector[1],
*(int*)&pr_immediate.vector[2]);
cn = (def_t*) Hash_Find (vector_imm_defs, rep);
tab = vector_imm_defs;
//printf ("%f %f %f\n",pr_immediate.vector[0], pr_immediate.vector[1], pr_immediate.vector[2]);
} else {
PR_ParseError ("weird immediate type");
}
if (cn) {
if (cn->type != pr_immediate_type) printf("urk\n");
//printf("found\n");
PR_Lex ();
return cn;
}
// allocate a new one
// always share immediates
if (def) {
cn = def;
} else {
cn = PR_NewDef (pr_immediate_type, "IMMEDIATE", 0);
cn->ofs = numpr_globals;
pr_global_defs[cn->ofs] = cn;
numpr_globals += type_size[pr_immediate_type->type];
}
cn->initialized = 1;
// copy the immediate to the global area
if (pr_immediate_type == &type_string)
pr_immediate.string = CopyString (pr_immediate_string);
memcpy (pr_globals + cn->ofs, &pr_immediate,
4 * type_size[pr_immediate_type->type]);
Hash_Add (tab, cn);
PR_Lex ();
return cn;
}