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/* main.c
* Created: 2023-09-02
* Author: Aryadev Chavali
* Description: Entrypoint of compiler
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "./lib.h"
#include "./parser.h"
#define MEMORY_DEFAULT 30000
typedef struct
{
size_t dp;
uint8_t memory[MEMORY_DEFAULT];
} machine_t;
void interpret(machine_t *cpu, node_t *ast, size_t num)
{
for (size_t i = 0; i < num; ++i)
{
node_t node = ast[i];
switch (node.type)
{
case NEXT:
++cpu->dp;
break;
case PREV:
--cpu->dp;
break;
case INC:
++cpu->memory[cpu->dp];
break;
case DEC:
--cpu->memory[cpu->dp];
break;
case OUT:
putchar(cpu->memory[cpu->dp]);
break;
case READ:
cpu->memory[cpu->dp] = getchar();
break;
case LIN:
if (cpu->memory[cpu->dp] == 0)
i = node.loop_ref;
break;
case LOUT:
if (cpu->memory[cpu->dp] != 0)
i = node.loop_ref;
break;
}
}
}
int main(int argc, char *argv[])
{
if (argc == 1)
{
fprintf(
stderr,
"Usage: %s [FILE]...\nReads FILES sequentially on the same machine\n",
argv[0]);
return 1;
}
char *filepath, *file_data;
buffer_t *buffer;
struct PResult res;
machine_t machine = {0};
for (int i = 1; i < argc; ++i)
{
filepath = argv[i];
FILE *handle = fopen(filepath, "r");
if (!handle)
{
fprintf(stderr, "ERROR: Could not open \"%s\"\n", filepath);
goto error;
}
file_data = fread_all(handle);
fclose(handle);
buffer = buffer_init_str(filepath, file_data, strlen(file_data));
res = parse_buffer(buffer);
if (res.nodes == NULL)
{
fputs("Exiting early...\n", stderr);
goto error;
}
char *str = ast_to_str(res.nodes, res.size);
printf("%s=>%s\n", filepath, str);
interpret(&machine, res.nodes, res.size);
free(str);
free(res.nodes);
free(buffer);
free(file_data);
}
return 0;
error:
if (buffer)
free(buffer);
if (res.nodes)
free(res.nodes);
return 1;
}
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