655 lines
13 KiB
C
655 lines
13 KiB
C
/*
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Copyright (C) 1996-2001 Id Software, Inc.
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Copyright (C) 2010-2014 QuakeSpasm developers
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "quakedef.h"
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typedef struct
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{
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int s;
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dfunction_t *f;
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} prstack_t;
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#define MAX_STACK_DEPTH 64 /* was 32 */
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static prstack_t pr_stack[MAX_STACK_DEPTH];
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static int pr_depth;
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#define LOCALSTACK_SIZE 2048
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static int localstack[LOCALSTACK_SIZE];
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static int localstack_used;
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qboolean pr_trace;
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dfunction_t *pr_xfunction;
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int pr_xstatement;
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int pr_argc;
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static const char *pr_opnames[] =
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{
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"DONE",
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"MUL_F",
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"MUL_V",
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"MUL_FV",
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"MUL_VF",
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"DIV",
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"ADD_F",
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"ADD_V",
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"SUB_F",
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"SUB_V",
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"EQ_F",
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"EQ_V",
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"EQ_S",
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"EQ_E",
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"EQ_FNC",
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"NE_F",
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"NE_V",
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"NE_S",
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"NE_E",
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"NE_FNC",
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"LE",
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"GE",
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"LT",
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"GT",
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"INDIRECT",
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"INDIRECT",
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"INDIRECT",
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"INDIRECT",
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"INDIRECT",
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"INDIRECT",
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"ADDRESS",
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"STORE_F",
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"STORE_V",
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"STORE_S",
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"STORE_ENT",
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"STORE_FLD",
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"STORE_FNC",
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"STOREP_F",
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"STOREP_V",
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"STOREP_S",
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"STOREP_ENT",
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"STOREP_FLD",
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"STOREP_FNC",
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"RETURN",
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"NOT_F",
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"NOT_V",
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"NOT_S",
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"NOT_ENT",
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"NOT_FNC",
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"IF",
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"IFNOT",
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"CALL0",
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"CALL1",
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"CALL2",
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"CALL3",
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"CALL4",
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"CALL5",
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"CALL6",
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"CALL7",
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"CALL8",
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"STATE",
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"GOTO",
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"AND",
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"OR",
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"BITAND",
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"BITOR"
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};
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const char *PR_GlobalString (int ofs);
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const char *PR_GlobalStringNoContents (int ofs);
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//=============================================================================
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/*
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=================
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PR_PrintStatement
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=================
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*/
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static void PR_PrintStatement (dstatement_t *s)
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{
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int i;
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if ((unsigned int)s->op < sizeof(pr_opnames)/sizeof(pr_opnames[0]))
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{
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Con_Printf("%s ", pr_opnames[s->op]);
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i = strlen(pr_opnames[s->op]);
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for ( ; i < 10; i++)
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Con_Printf(" ");
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}
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if (s->op == OP_IF || s->op == OP_IFNOT)
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Con_Printf("%sbranch %i", PR_GlobalString(s->a), s->b);
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else if (s->op == OP_GOTO)
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{
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Con_Printf("branch %i", s->a);
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}
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else if ((unsigned int)(s->op-OP_STORE_F) < 6)
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{
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Con_Printf("%s", PR_GlobalString(s->a));
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Con_Printf("%s", PR_GlobalStringNoContents(s->b));
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}
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else
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{
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if (s->a)
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Con_Printf("%s", PR_GlobalString(s->a));
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if (s->b)
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Con_Printf("%s", PR_GlobalString(s->b));
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if (s->c)
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Con_Printf("%s", PR_GlobalStringNoContents(s->c));
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}
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Con_Printf("\n");
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}
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/*
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============
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PR_StackTrace
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============
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*/
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static void PR_StackTrace (void)
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{
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int i;
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dfunction_t *f;
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if (pr_depth == 0)
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{
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Con_Printf("<NO STACK>\n");
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return;
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}
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pr_stack[pr_depth].f = pr_xfunction;
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for (i = pr_depth; i >= 0; i--)
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{
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f = pr_stack[i].f;
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if (!f)
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{
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Con_Printf("<NO FUNCTION>\n");
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}
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else
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{
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Con_Printf("%12s : %s\n", PR_GetString(f->s_file), PR_GetString(f->s_name));
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}
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}
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}
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/*
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============
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PR_Profile_f
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============
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*/
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void PR_Profile_f (void)
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{
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int i, num;
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int pmax;
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dfunction_t *f, *best;
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if (!sv.active)
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return;
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num = 0;
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do
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{
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pmax = 0;
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best = NULL;
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for (i = 0; i < progs->numfunctions; i++)
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{
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f = &pr_functions[i];
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if (f->profile > pmax)
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{
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pmax = f->profile;
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best = f;
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}
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}
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if (best)
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{
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if (num < 10)
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Con_Printf("%7i %s\n", best->profile, PR_GetString(best->s_name));
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num++;
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best->profile = 0;
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}
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} while (best);
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}
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/*
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============
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PR_RunError
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Aborts the currently executing function
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============
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*/
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void PR_RunError (const char *error, ...)
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{
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va_list argptr;
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char string[1024];
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va_start (argptr, error);
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q_vsnprintf (string, sizeof(string), error, argptr);
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va_end (argptr);
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PR_PrintStatement(pr_statements + pr_xstatement);
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PR_StackTrace();
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Con_Printf("%s\n", string);
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pr_depth = 0; // dump the stack so host_error can shutdown functions
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Host_Error("Program error");
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}
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/*
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====================
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PR_EnterFunction
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Returns the new program statement counter
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====================
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*/
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static int PR_EnterFunction (dfunction_t *f)
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{
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int i, j, c, o;
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pr_stack[pr_depth].s = pr_xstatement;
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pr_stack[pr_depth].f = pr_xfunction;
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pr_depth++;
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if (pr_depth >= MAX_STACK_DEPTH)
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PR_RunError("stack overflow");
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// save off any locals that the new function steps on
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c = f->locals;
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if (localstack_used + c > LOCALSTACK_SIZE)
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PR_RunError("PR_ExecuteProgram: locals stack overflow\n");
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for (i = 0; i < c ; i++)
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localstack[localstack_used + i] = ((int *)pr_globals)[f->parm_start + i];
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localstack_used += c;
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// copy parameters
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o = f->parm_start;
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for (i = 0; i < f->numparms; i++)
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{
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for (j = 0; j < f->parm_size[i]; j++)
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{
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((int *)pr_globals)[o] = ((int *)pr_globals)[OFS_PARM0 + i*3 + j];
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o++;
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}
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}
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pr_xfunction = f;
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return f->first_statement - 1; // offset the s++
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}
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/*
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====================
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PR_LeaveFunction
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====================
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*/
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static int PR_LeaveFunction (void)
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{
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int i, c;
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if (pr_depth <= 0)
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Host_Error("prog stack underflow");
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// Restore locals from the stack
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c = pr_xfunction->locals;
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localstack_used -= c;
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if (localstack_used < 0)
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PR_RunError("PR_ExecuteProgram: locals stack underflow");
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for (i = 0; i < c; i++)
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((int *)pr_globals)[pr_xfunction->parm_start + i] = localstack[localstack_used + i];
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// up stack
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pr_depth--;
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pr_xfunction = pr_stack[pr_depth].f;
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return pr_stack[pr_depth].s;
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}
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/*
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====================
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PR_ExecuteProgram
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The interpretation main loop
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====================
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*/
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#define OPA ((eval_t *)&pr_globals[(unsigned short)st->a])
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#define OPB ((eval_t *)&pr_globals[(unsigned short)st->b])
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#define OPC ((eval_t *)&pr_globals[(unsigned short)st->c])
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void PR_ExecuteProgram (func_t fnum)
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{
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eval_t *ptr;
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dstatement_t *st;
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dfunction_t *f, *newf;
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int profile, startprofile;
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edict_t *ed;
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int exitdepth;
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if (!fnum || fnum >= progs->numfunctions)
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{
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if (pr_global_struct->self)
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ED_Print (PROG_TO_EDICT(pr_global_struct->self));
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Host_Error ("PR_ExecuteProgram: NULL function");
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}
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f = &pr_functions[fnum];
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pr_trace = false;
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// make a stack frame
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exitdepth = pr_depth;
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st = &pr_statements[PR_EnterFunction(f)];
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startprofile = profile = 0;
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while (1)
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{
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st++; /* next statement */
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if (++profile > 100000)
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{
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pr_xstatement = st - pr_statements;
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PR_RunError("runaway loop error");
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}
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if (pr_trace)
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PR_PrintStatement(st);
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switch (st->op)
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{
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case OP_ADD_F:
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OPC->_float = OPA->_float + OPB->_float;
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break;
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case OP_ADD_V:
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OPC->vector[0] = OPA->vector[0] + OPB->vector[0];
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OPC->vector[1] = OPA->vector[1] + OPB->vector[1];
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OPC->vector[2] = OPA->vector[2] + OPB->vector[2];
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break;
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case OP_SUB_F:
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OPC->_float = OPA->_float - OPB->_float;
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break;
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case OP_SUB_V:
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OPC->vector[0] = OPA->vector[0] - OPB->vector[0];
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OPC->vector[1] = OPA->vector[1] - OPB->vector[1];
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OPC->vector[2] = OPA->vector[2] - OPB->vector[2];
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break;
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case OP_MUL_F:
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OPC->_float = OPA->_float * OPB->_float;
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break;
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case OP_MUL_V:
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OPC->_float = OPA->vector[0] * OPB->vector[0] +
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OPA->vector[1] * OPB->vector[1] +
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OPA->vector[2] * OPB->vector[2];
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break;
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case OP_MUL_FV:
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OPC->vector[0] = OPA->_float * OPB->vector[0];
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OPC->vector[1] = OPA->_float * OPB->vector[1];
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OPC->vector[2] = OPA->_float * OPB->vector[2];
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break;
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case OP_MUL_VF:
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OPC->vector[0] = OPB->_float * OPA->vector[0];
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OPC->vector[1] = OPB->_float * OPA->vector[1];
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OPC->vector[2] = OPB->_float * OPA->vector[2];
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break;
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case OP_DIV_F:
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OPC->_float = OPA->_float / OPB->_float;
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break;
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case OP_BITAND:
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OPC->_float = (int)OPA->_float & (int)OPB->_float;
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break;
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case OP_BITOR:
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OPC->_float = (int)OPA->_float | (int)OPB->_float;
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break;
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case OP_GE:
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OPC->_float = OPA->_float >= OPB->_float;
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break;
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case OP_LE:
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OPC->_float = OPA->_float <= OPB->_float;
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break;
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case OP_GT:
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OPC->_float = OPA->_float > OPB->_float;
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break;
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case OP_LT:
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OPC->_float = OPA->_float < OPB->_float;
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break;
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case OP_AND:
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OPC->_float = OPA->_float && OPB->_float;
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break;
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case OP_OR:
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OPC->_float = OPA->_float || OPB->_float;
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break;
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case OP_NOT_F:
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OPC->_float = !OPA->_float;
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break;
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case OP_NOT_V:
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OPC->_float = !OPA->vector[0] && !OPA->vector[1] && !OPA->vector[2];
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break;
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case OP_NOT_S:
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OPC->_float = !OPA->string || !*PR_GetString(OPA->string);
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break;
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case OP_NOT_FNC:
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OPC->_float = !OPA->function;
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break;
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case OP_NOT_ENT:
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OPC->_float = (PROG_TO_EDICT(OPA->edict) == sv.edicts);
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break;
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case OP_EQ_F:
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OPC->_float = OPA->_float == OPB->_float;
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break;
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case OP_EQ_V:
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OPC->_float = (OPA->vector[0] == OPB->vector[0]) &&
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(OPA->vector[1] == OPB->vector[1]) &&
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(OPA->vector[2] == OPB->vector[2]);
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break;
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case OP_EQ_S:
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OPC->_float = !strcmp(PR_GetString(OPA->string), PR_GetString(OPB->string));
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break;
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case OP_EQ_E:
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OPC->_float = OPA->_int == OPB->_int;
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break;
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case OP_EQ_FNC:
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OPC->_float = OPA->function == OPB->function;
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break;
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case OP_NE_F:
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OPC->_float = OPA->_float != OPB->_float;
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break;
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case OP_NE_V:
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OPC->_float = (OPA->vector[0] != OPB->vector[0]) ||
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(OPA->vector[1] != OPB->vector[1]) ||
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(OPA->vector[2] != OPB->vector[2]);
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break;
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case OP_NE_S:
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OPC->_float = strcmp(PR_GetString(OPA->string), PR_GetString(OPB->string));
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break;
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case OP_NE_E:
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OPC->_float = OPA->_int != OPB->_int;
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break;
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case OP_NE_FNC:
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OPC->_float = OPA->function != OPB->function;
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break;
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case OP_STORE_F:
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case OP_STORE_ENT:
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case OP_STORE_FLD: // integers
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case OP_STORE_S:
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case OP_STORE_FNC: // pointers
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OPB->_int = OPA->_int;
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break;
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case OP_STORE_V:
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OPB->vector[0] = OPA->vector[0];
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OPB->vector[1] = OPA->vector[1];
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OPB->vector[2] = OPA->vector[2];
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break;
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case OP_STOREP_F:
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case OP_STOREP_ENT:
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case OP_STOREP_FLD: // integers
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case OP_STOREP_S:
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case OP_STOREP_FNC: // pointers
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ptr = (eval_t *)((byte *)sv.edicts + OPB->_int);
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ptr->_int = OPA->_int;
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break;
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case OP_STOREP_V:
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ptr = (eval_t *)((byte *)sv.edicts + OPB->_int);
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ptr->vector[0] = OPA->vector[0];
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ptr->vector[1] = OPA->vector[1];
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ptr->vector[2] = OPA->vector[2];
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break;
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case OP_ADDRESS:
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ed = PROG_TO_EDICT(OPA->edict);
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#ifdef PARANOID
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NUM_FOR_EDICT(ed); // Make sure it's in range
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#endif
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if (ed == (edict_t *)sv.edicts && sv.state == ss_active)
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{
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pr_xstatement = st - pr_statements;
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PR_RunError("assignment to world entity");
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}
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OPC->_int = (byte *)((int *)&ed->v + OPB->_int) - (byte *)sv.edicts;
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break;
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case OP_LOAD_F:
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case OP_LOAD_FLD:
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case OP_LOAD_ENT:
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case OP_LOAD_S:
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case OP_LOAD_FNC:
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ed = PROG_TO_EDICT(OPA->edict);
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#ifdef PARANOID
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NUM_FOR_EDICT(ed); // Make sure it's in range
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#endif
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OPC->_int = ((eval_t *)((int *)&ed->v + OPB->_int))->_int;
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break;
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case OP_LOAD_V:
|
|
ed = PROG_TO_EDICT(OPA->edict);
|
|
#ifdef PARANOID
|
|
NUM_FOR_EDICT(ed); // Make sure it's in range
|
|
#endif
|
|
ptr = (eval_t *)((int *)&ed->v + OPB->_int);
|
|
OPC->vector[0] = ptr->vector[0];
|
|
OPC->vector[1] = ptr->vector[1];
|
|
OPC->vector[2] = ptr->vector[2];
|
|
break;
|
|
|
|
case OP_IFNOT:
|
|
if (!OPA->_int)
|
|
st += st->b - 1; /* -1 to offset the st++ */
|
|
break;
|
|
|
|
case OP_IF:
|
|
if (OPA->_int)
|
|
st += st->b - 1; /* -1 to offset the st++ */
|
|
break;
|
|
|
|
case OP_GOTO:
|
|
st += st->a - 1; /* -1 to offset the st++ */
|
|
break;
|
|
|
|
case OP_CALL0:
|
|
case OP_CALL1:
|
|
case OP_CALL2:
|
|
case OP_CALL3:
|
|
case OP_CALL4:
|
|
case OP_CALL5:
|
|
case OP_CALL6:
|
|
case OP_CALL7:
|
|
case OP_CALL8:
|
|
pr_xfunction->profile += profile - startprofile;
|
|
startprofile = profile;
|
|
pr_xstatement = st - pr_statements;
|
|
pr_argc = st->op - OP_CALL0;
|
|
if (!OPA->function)
|
|
PR_RunError("NULL function");
|
|
newf = &pr_functions[OPA->function];
|
|
if (newf->first_statement < 0)
|
|
{ // Built-in function
|
|
int i = -newf->first_statement;
|
|
if (i >= pr_numbuiltins)
|
|
PR_RunError("Bad builtin call number %d", i);
|
|
pr_builtins[i]();
|
|
break;
|
|
}
|
|
// Normal function
|
|
st = &pr_statements[PR_EnterFunction(newf)];
|
|
break;
|
|
|
|
case OP_DONE:
|
|
case OP_RETURN:
|
|
pr_xfunction->profile += profile - startprofile;
|
|
startprofile = profile;
|
|
pr_xstatement = st - pr_statements;
|
|
pr_globals[OFS_RETURN] = pr_globals[(unsigned short)st->a];
|
|
pr_globals[OFS_RETURN + 1] = pr_globals[(unsigned short)st->a + 1];
|
|
pr_globals[OFS_RETURN + 2] = pr_globals[(unsigned short)st->a + 2];
|
|
st = &pr_statements[PR_LeaveFunction()];
|
|
if (pr_depth == exitdepth)
|
|
{ // Done
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case OP_STATE:
|
|
ed = PROG_TO_EDICT(pr_global_struct->self);
|
|
ed->v.nextthink = pr_global_struct->time + 0.1;
|
|
ed->v.frame = OPA->_float;
|
|
ed->v.think = OPB->function;
|
|
break;
|
|
|
|
default:
|
|
pr_xstatement = st - pr_statements;
|
|
PR_RunError("Bad opcode %i", st->op);
|
|
}
|
|
} /* end of while(1) loop */
|
|
}
|
|
#undef OPA
|
|
#undef OPB
|
|
#undef OPC
|
|
|