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//-----------------------------------------------------------------------------
// Copyright 2007 Jonathan Westhues
//
// This file is part of LDmicro.
//
// LDmicro 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 3 of the License, or
// (at your option) any later version.
//
// LDmicro 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 LDmicro. If not, see <http://www.gnu.org/licenses/>.
//------
//
// A crunched-down version of the intermediate code (e.g. assigning addresses
// to all the variables instead of just working with their names), suitable
// for interpretation.
// Jonathan Westhues, Aug 2005
//-----------------------------------------------------------------------------
#include "linuxUI.h"
#include <stdio.h>
#include <setjmp.h>
#include <stdlib.h>
#include "ldmicro.h"
#include "intcode.h"
static char Variables[MAX_IO][MAX_NAME_LEN];
static int VariablesCount;
static char InternalRelays[MAX_IO][MAX_NAME_LEN];
static int InternalRelaysCount;
typedef struct {
WORD op;
WORD name1;
WORD name2;
WORD name3;
SWORD literal;
} BinOp;
static BinOp OutProg[MAX_INT_OPS];
static WORD AddrForInternalRelay(char *name)
{
int i;
for(i = 0; i < InternalRelaysCount; i++) {
if(strcmp(InternalRelays[i], name)==0) {
return i;
}
}
strcpy(InternalRelays[i], name);
InternalRelaysCount++;
return i;
}
static WORD AddrForVariable(char *name)
{
int i;
for(i = 0; i < VariablesCount; i++) {
if(strcmp(Variables[i], name)==0) {
return i;
}
}
strcpy(Variables[i], name);
VariablesCount++;
return i;
}
static void Write(FILE *f, BinOp *op)
{
BYTE *b = (BYTE *)op;
int i;
for(i = 0; i < sizeof(*op); i++) {
fprintf(f, "%02x", b[i]);
}
fprintf(f, "\n");
}
void CompileInterpreted(char *outFile)
{
FILE *f = fopen(outFile, "w");
if(!f) {
Error(_("Couldn't write to '%s'"), outFile);
return;
}
InternalRelaysCount = 0;
VariablesCount = 0;
fprintf(f, "$$LDcode\n");
int ipc;
int outPc;
BinOp op;
// Convert the if/else structures in the intermediate code to absolute
// conditional jumps, to make life a bit easier for the interpreter.
#define MAX_IF_NESTING 32
int ifDepth = 0;
// PC for the if(...) instruction, which we will complete with the
// 'jump to if false' address (which is either the ELSE+1 or the ENDIF+1)
int ifOpIf[MAX_IF_NESTING];
// PC for the else instruction, which we will complete with the
// 'jump to if reached' address (which is the ENDIF+1)
int ifOpElse[MAX_IF_NESTING];
outPc = 0;
for(ipc = 0; ipc < IntCodeLen; ipc++) {
memset(&op, 0, sizeof(op));
op.op = IntCode[ipc].op;
switch(IntCode[ipc].op) {
case INT_CLEAR_BIT:
case INT_SET_BIT:
op.name1 = AddrForInternalRelay(IntCode[ipc].name1);
break;
case INT_COPY_BIT_TO_BIT:
op.name1 = AddrForInternalRelay(IntCode[ipc].name1);
op.name2 = AddrForInternalRelay(IntCode[ipc].name2);
break;
case INT_SET_VARIABLE_TO_LITERAL:
op.name1 = AddrForVariable(IntCode[ipc].name1);
op.literal = IntCode[ipc].literal;
break;
case INT_SET_VARIABLE_TO_VARIABLE:
op.name1 = AddrForVariable(IntCode[ipc].name1);
op.name2 = AddrForVariable(IntCode[ipc].name2);
break;
case INT_INCREMENT_VARIABLE:
op.name1 = AddrForVariable(IntCode[ipc].name1);
break;
case INT_SET_VARIABLE_ADD:
case INT_SET_VARIABLE_SUBTRACT:
case INT_SET_VARIABLE_MULTIPLY:
case INT_SET_VARIABLE_DIVIDE:
op.name1 = AddrForVariable(IntCode[ipc].name1);
op.name2 = AddrForVariable(IntCode[ipc].name2);
op.name3 = AddrForVariable(IntCode[ipc].name3);
break;
case INT_IF_BIT_SET:
case INT_IF_BIT_CLEAR:
op.name1 = AddrForInternalRelay(IntCode[ipc].name1);
goto finishIf;
case INT_IF_VARIABLE_LES_LITERAL:
op.name1 = AddrForVariable(IntCode[ipc].name1);
op.literal = IntCode[ipc].literal;
goto finishIf;
case INT_IF_VARIABLE_EQUALS_VARIABLE:
case INT_IF_VARIABLE_GRT_VARIABLE:
op.name1 = AddrForVariable(IntCode[ipc].name1);
op.name2 = AddrForVariable(IntCode[ipc].name2);
goto finishIf;
finishIf:
ifOpIf[ifDepth] = outPc;
ifOpElse[ifDepth] = 0;
ifDepth++;
// jump target will be filled in later
break;
case INT_ELSE:
ifOpElse[ifDepth-1] = outPc;
// jump target will be filled in later
break;
case INT_END_IF:
--ifDepth;
if(ifOpElse[ifDepth] == 0) {
// There is no else; if should jump straight to the
// instruction after this one if the condition is false.
OutProg[ifOpIf[ifDepth]].name3 = outPc-1;
} else {
// There is an else clause; if the if is false then jump
// just past the else, and if the else is reached then
// jump to the endif.
OutProg[ifOpIf[ifDepth]].name3 = ifOpElse[ifDepth];
OutProg[ifOpElse[ifDepth]].name3 = outPc-1;
}
// But don't generate an instruction for this.
continue;
case INT_SIMULATE_NODE_STATE:
case INT_COMMENT:
// Don't care; ignore, and don't generate an instruction.
continue;
case INT_EEPROM_BUSY_CHECK:
case INT_EEPROM_READ:
case INT_EEPROM_WRITE:
case INT_READ_ADC:
case INT_SET_PWM:
case INT_UART_SEND:
case INT_UART_RECV:
default:
Error(_("Unsupported op (anything ADC, PWM, UART, EEPROM) for "
"interpretable target."));
fclose(f);
return;
}
memcpy(&OutProg[outPc], &op, sizeof(op));
outPc++;
}
int i;
for(i = 0; i < outPc; i++) {
Write(f, &OutProg[i]);
}
memset(&op, 0, sizeof(op));
op.op = INT_END_OF_PROGRAM;
Write(f, &op);
fprintf(f, "$$bits\n");
for(i = 0; i < InternalRelaysCount; i++) {
if(InternalRelays[i][0] != '$') {
fprintf(f, "%s,%d\n", InternalRelays[i], i);
}
}
fprintf(f, "$$int16s\n");
for(i = 0; i < VariablesCount; i++) {
if(Variables[i][0] != '$') {
fprintf(f, "%s,%d\n", Variables[i], i);
}
}
fprintf(f, "$$cycle %d us\n", Prog.cycleTime);
fclose(f);
char str[MAX_PATH+500];
sprintf(str,
_("Compile successful; wrote interpretable code to '%s'.\r\n\r\n"
"You probably have to adapt the interpreter to your application. See "
"the documentation."), outFile);
CompileSuccessfulMessage(str);
}
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