main.c

/*
CLI interface for roblox-java.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "roblox-java/transpiler.h"

/* Strings. */
#define NO_ARGUMENTS_STRING "roblox-java: A full-on transpiler for converting Java code into Luau code.\nPass --help for commands or --info for more information.\n"
#define HELP_STRING         "--version (--v) -- Version string.\n--compile (--c) <source> <out> -- Compiles all the <source> contents into the <out> directory.\n"
#define VERSION_STRING      "roblox-java version %s. (C) All rights reserved.\n"

/* String utilities. */
static int string_size(const char* x) {
  int sz = -1;
  while (x[++sz] != '\0');
  return sz;
}

static int string_compare(const char* x, const char* y) {
  int i = -1;
  while(x[++i] != '\0' && x[i] == y[i]);
  return string_size(y) == i;
}

/* Prints, then exits program. */
#define printf_stop(...) printf(__VA_ARGS__); exit(EXIT_FAILURE)

/*}==========================================*/

/* Commands. */

static inline void help() {
  printf_stop(HELP_STRING);
}
static inline void version() {
  printf_stop(VERSION_STRING, RBXJ_VERSION);
}
static inline void compile(int argc, char* argv[]) {
  /* Get arguments. */
  const char* src_dir = argv[2];
  const char* out_dir = argv[3];
  struct stat* d1;
  struct stat* d2;

  /* Sanity check. */
  /*
  ! doesnt work atm
  if (stat(src_dir, d1) > 0 || stat(out_dir, d2) > 0 ||
      (d1->st_mode & S_IFDIR) || (d2->st_mode & S_IFDIR)) {
    fprintf(stderr, "Either path is invalid.\n");
    exit(EXIT_FAILURE);
  }
  */

  /* Success! */
  RBXJ_Compile_Dirs(src_dir, out_dir);
  exit(EXIT_SUCCESS);
}

/*}==========================================*/

/*
====================================================================
MAIN
====================================================================
*/
int main(int argc, char* argv[]) {
  if (argc < 2) {
    /* No arguments. */
    printf_stop(NO_ARGUMENTS_STRING);
  }

  const char* cmd = argv[1];

  /* There is an argument. */
  if (string_compare(cmd, "--help")) {
    help();
  }
  if (string_compare(cmd, "--version") || string_compare(cmd, "--v")) {
    version();
  }
  if (string_compare(cmd, "--compile") || string_compare(cmd, "--c")) {
    compile(argc, argv);
  }

  /* Invalid command. */
  fprintf(stderr, "Invalid command %s.\n", cmd);
  return EXIT_FAILURE;
}