#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

int main(int argc, char *argv[]) {
  int i, f, sp=0;
  char *buffer;
  struct stat s;

  if (argc < 2) {
    fprintf(stderr, "usage: %s [srcfile]\n", argv[0]);
    return 1;}

  if ((f = open(argv[1], O_RDONLY)) == -1) {
    fprintf(stderr, "%s: %s: %s\n", argv[0], argv[1], strerror(errno));
    return 1;}

  fstat(f, &s);
  buffer = malloc(s.st_size);
  read(f, buffer, s.st_size);

  while (*buffer) {
    switch(*buffer) {
	case ';': printf(";\n"); for (i=0; i<sp; i++) printf("  "); break;
	case '{': printf("\n");
		for (i=0; i<sp; i++) printf("  ");
		printf("{\n"); sp++;
		for (i=0; i<sp; i++) printf("  "); break;
	case '}': printf("\n");
		for (i=0; i<sp; i++) printf("  ");
		printf("}\n"); sp--;
		for (i=0; i<sp; i++) printf("  "); break;
	case ',': printf(", "); break;
	case '(': printf(" ("); break;
	case '+':
	case '-':
	case '*':
	case '/':
	case '=': printf(" %c ", *buffer); break;
	default: printf("%c", *buffer);
    }

    buffer++;
  }

  close(f);
  return 0;
}