156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifndef instruktion
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#include "instruktion.c"
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#endif /* ifndef instruktion */
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#ifndef code
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#include "code.c"
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#endif /* ifndef code */
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//Comment to disable debug
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#define DEBUG
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unsigned int programmSpeicher[1000];
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void copyToProgramm(const unsigned int codeToCopy[], int length){
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for (int i = 0; i < length; i++) {
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programmSpeicher[i] = codeToCopy[i];
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}
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}
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// Stack
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#define maxValues 1000
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unsigned int stack[maxValues];
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unsigned int current = 0;
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void stackPush(unsigned int value) {
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if (current > (maxValues-1)) {
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fprintf(stderr, "stack overflow\n");
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exit(EXIT_FAILURE);
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}
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stack[current] = value;
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current++;
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}
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unsigned int stackPop(void) {
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if (current < 1) {
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fprintf(stderr, "stack underflow\n");
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exit(EXIT_FAILURE);
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}
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return stack[--current];
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}
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void version(void) {
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printf("Ninja Virtual Machine version %i (compiled %s, %s)\n", 0, __DATE__, __TIME__);
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}
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void help(void) {
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printf("usage: ./njvm [option] [option] ...\n\t--version\tshow version and exit\n\t--help\t\tshow this help and exit\n");
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}
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void useption(int argc, char *argv[]) {
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if (argc > 1) {
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if (strcmp(argv[1], "--version") == 0) {
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version();
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} else if (strcmp(argv[1], "--help") == 0) {
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help();
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} else {
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printf("unknown command line argument '%s', try './njvm --help'", argv[1]);
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}
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}
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}
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void execute(void) {
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int i = 0;
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int intInput;
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int temp;
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char charInput;
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while (programmSpeicher[i] != 0) {
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switch (programmSpeicher[i] >> 24) {
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case HALT:
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goto end;
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break;
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case PUSHC:
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stackPush(IMMEDIATE(programmSpeicher[i]));
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break;
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case ADD:
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stackPush(stackPop()+stackPop());
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break;
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case SUB:
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temp = stackPop();
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stackPush(stackPop() - temp);
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break;
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case MUL:
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stackPush(stackPop()*stackPop());
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break;
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case DIV:
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temp = stackPop();
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stackPush(stackPop()/temp);
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break;
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case MOD:
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temp = stackPop();
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stackPush(stackPop()%temp);
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break;
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case RDINT:
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scanf("%i",&intInput);
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stackPush(intInput);
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break;
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case WRINT:
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printf("%i\n",stackPop());
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break;
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case RDCHR:
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scanf("%c",&charInput);
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stackPush(charInput);
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break;
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case WRCHR:
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printf("%c\n",stackPop());
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break;
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}
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i++;
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}
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end:
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printf("Finished\n");
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}
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#ifdef DEBUG
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void printStack(void){
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if(current >= 0) return;
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printf("----\n");
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for (int i = 0; i < current; i++) {
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printf("|%i| \n",stack[i]);
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}
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printf("----\n");
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}
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void tests(void){
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printf("Runnig debug mode\n");
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copyToProgramm(code1,sizeof(code1)/sizeof(code1[0]));
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execute();
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}
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#endif /* ifdef DEBUG */
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int main(int argc, char *argv[]) {
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#ifdef DEBUG
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tests();
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#endif /* ifdef DEBUG */
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if (argc > 1) useption(argc, argv);
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else {
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// Started
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printf("Ninja Virtual Machine started\n");
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// Stopped
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printf("Ninja Virtual Machine stopped\n");
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return 0;
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}
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}
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