main.c

#include <stdio.h>
#include <stdlib.h>
#include "chunk.h"
#include "common.h"
#include "debug.h"
#include "vm.h"


static void repl(){
    char line[1024];
    for (;;){
        printf("> ");

        if (!fgets(line, sizeof(line),stdin)){
            printf("\n");
            break;
        }
        interpret(line);
    }
}

static char* readFile(const char* path){
    FILE* file = fopen(path, "rb");

    if (file == NULL) {
        fprintf(stderr, "Wrong path or no permission to read from");
        exit(74);
    }
    fseek(file,0L,SEEK_END);
    size_t fileSize = ftell(file);
    rewind(file);

    char* buffer = (char*)malloc(fileSize + 1);
    if (buffer == NULL) {
        fprintf(stderr, "Not enough memory");
        exit(74);
    }
    size_t bytesRead = fread(buffer, sizeof(char),fileSize,file);
    if (bytesRead < fileSize) {
        fprintf(stderr, "could not read file");
        exit(74);
    }
 
    buffer[bytesRead] = '\0';

    fclose(file);
    return buffer;
}

static void runFile(const char* path){
    char* source = readFile(path);
    IntrepretResult result = interpret(source); 
    free(source);

    if (result == INTERPRET_COMPILE_ERROR) exit(65);
    if (result == INTERPRET_RUNTIME_ERROR) exit(70);
}


int main(int argc, char* argv[]){
    initVM();

    if (argc == 1){
        repl();
    }
    else if (argc == 2){
        runFile(argv[1]);
    }
    else{
        fprintf(stderr,"usage: clox [path]\n" );
        exit(64);
    }
    freeVM();

    return EXIT_SUCCESS;
}