retroforth/tools/muri.c

196 lines
4.6 KiB
C
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// Copyright (c) 2017-2019 Charles Childers
// Copyright (c) 2019 Luke Parrish
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "strl.h"
#ifndef BIT64
#define CELL int32_t
#define CELL_MIN INT_MIN + 1
#define CELL_MAX INT_MAX - 1
#else
#define CELL int64_t
#define CELL_MIN LLONG_MIN + 1
#define CELL_MAX LLONG_MAX - 1
#endif
#define KiB * 1024
#define MAX_NAMES 1024
#define STRING_LEN 64
#ifndef IMAGE_SIZE
#define IMAGE_SIZE 128 KiB
#endif
char Labels[MAX_NAMES][STRING_LEN];
CELL Pointers[MAX_NAMES];
CELL np;
char source[1 KiB];
CELL target[IMAGE_SIZE];
CELL here;
void save() {
FILE *fp;
if ((fp = fopen("ngaImage", "wb")) == NULL) {
printf("Unable to save the image!\n");
exit(2);
}
fwrite(&target, sizeof(CELL), here, fp);
fclose(fp);
}
CELL lookup(char *name) {
CELL slice = -1;
CELL n = np;
while (n > 0) {
n--;
if (strcmp(Labels[n], name) == 0)
slice = Pointers[n];
}
return slice;
}
void add_label(char *name, CELL slice) {
if (lookup(name) == -1) {
bsd_strlcpy(Labels[np], name, STRING_LEN);
Pointers[np] = slice;
np++;
} else {
printf("Fatal error: %s already defined\n", name);
exit(0);
}
}
void read_line(FILE *file, char *line_buffer) {
int ch = getc(file);
int count = 0;
while ((ch != '\n') && (ch != EOF)) {
line_buffer[count] = ch;
count++;
ch = getc(file);
}
line_buffer[count] = '\0';
}
CELL opcode_for(char *s) {
char* opcodeList = "..lidudrswpupojucaccreeqneltgtfestadsumudianorxoshzrhaieiqii";
int16_t* s16 = (int16_t *)s;
int16_t* op16 = (int16_t *)opcodeList;
int i = 0;
for(i = 0; i <= 30; i++){
if(s16[0] == op16[i]){
return i;
}
}
return 0;
}
void pass1(char *fname) {
int inBlock = 0;
char *buffer = (char *)source;
unsigned int opcode;
char inst[3];
FILE *fp;
inst[2] = '\0';
here = 0;
fp = fopen(fname, "r");
if (fp == NULL) {
printf("Unable to load file\n");
exit(2);
}
while (!feof(fp)) {
read_line(fp, buffer);
if (strcmp(buffer, "~~~") == 0) {
if (inBlock == 0)
inBlock = 1;
else
inBlock = 0;
} else {
if (inBlock == 1) {
if (buffer[1] == '\t' || buffer[1] == ' ') {
switch (buffer[0]) {
case 'i': memcpy(inst, buffer + 8, 2);
opcode = opcode_for(inst);
opcode = opcode << 8;
memcpy(inst, buffer + 6, 2);
opcode += opcode_for(inst);
opcode = opcode << 8;
memcpy(inst, buffer + 4, 2);
opcode += opcode_for(inst);
opcode = opcode << 8;
memcpy(inst, buffer + 2, 2);
opcode += opcode_for(inst);
target[here++] = opcode;
break;
case 'r': target[here++] = -1;
break;
case 'd': target[here++] = atoi(buffer+2);
break;
case 's': opcode = 2;
while (opcode < strlen(buffer))
target[here++] = buffer[opcode++];
target[here++] = 0;
break;
case ':': add_label(buffer+2, here);
break;
}
}
}
}
}
fclose(fp);
}
void pass2(char *fname) {
char *buffer;
FILE *fp;
int inBlock;
inBlock = 0;
buffer = (char *)source;
here = 0;
fp = fopen(fname, "r");
if (fp == NULL) {
printf("Unable to load file\n");
exit(2);
}
while (!feof(fp)) {
read_line(fp, buffer);
if (strcmp(buffer, "~~~") == 0) {
if (inBlock == 0)
inBlock = 1;
else
inBlock = 0;
} else {
if (inBlock == 1) {
switch (buffer[0]) {
case 'i': here++; break;
case 'r': target[here++] = lookup(buffer+2);
if (lookup(buffer+2) == -1)
printf("Lookup failed: '%s'\n", buffer+2);
break;
case 'd': here++; break;
case 's': here = here + strlen(buffer) - 1; break;
case ':': break;
}
}
}
}
fclose(fp);
}
int main(int argc, char **argv) {
np = 0;
if (argc > 1) {
pass1(argv[1]);
pass2(argv[1]);
save();
printf("Wrote %lld cells to ngaImage\n", (long long)here);
}
else
printf("muri\n(c) 2017-2019 charles childers, (c) 2019 luke parrish\n\n%s filename\n", argv[0]);
return 0;
}