#include "src/lib/util.h"
#include "src/user/syscall.h"

#define BLOCK_SIZE 65536

#define PRINT_S(s) write(1, s, sizeof(s) - 1);
#define PRINT_D(s) write(1, s, string_length(s));

exit_code_t cat(const char *path) {
  uint64_t fd = open(path);

  if (fd == (uint64_t)-1) {
    PRINT_S("cat: path does not exist\n");
    return EXIT_CODE_GENERAL_FAILURE;
  }

  static char buffer[BLOCK_SIZE];
  uint64_t bytes;
  while ((bytes = read(fd, BLOCK_SIZE, buffer))) {
    if (bytes == (uint64_t)-1) {
      PRINT_S("cat: could not read file\n");
      close(fd);
      return EXIT_CODE_GENERAL_FAILURE;
    }
    write(1, buffer, bytes);
  }

  close(fd);

  return 0;
}

exit_code_t main(uint64_t argc, const char **argv) {
  if (argc == 1) {
    return cat(".");
  }

  uint64_t code = EXIT_CODE_OK;
  for (uint64_t i = 1; i < argc; i++) {
    exit_code_t c = cat(argv[i]);
    if (c != EXIT_CODE_OK) {
      code = c;
    }
  }

  return code;
}