user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %rbx
  lea    D40(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D49(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D30(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D53(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D7(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  cmp    $0x1,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D21(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D69(%rip),%rbx
  mov    %rbx,%rdi
  call   <is_palindrome_iter@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rdi
  call   <is_palindrome_rec@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D11(%rip),%rdi
  call   <printf@plt>
  mov    $0x0,%eax
  pop    %rbx
  ret
```

tool_calls: name: parse_data
arguments: label: D40
datatype: string
name: parse_data
arguments: label: D49
datatype: string
name: parse_data
arguments: label: D30
datatype: string
name: parse_data
arguments: label: D53
datatype: string
name: parse_data
arguments: label: D7
datatype: string
name: parse_data
arguments: label: D21
datatype: string
name: parse_data
arguments: label: D69
datatype: string
name: parse_data
arguments: label: D11
datatype: string

tool: D40: regninger

tool: D49: regning

tool: 

tool: D53: i

tool: D7: aa

tool: D21: er

tool: D69: regnimger

tool: D11: All test passed


assistant: ```c
int main(void) {
  char *ord[] = {"regninger", "regning", "", "i", "aa", "er", "regnimger"};
  assert(1 == is_palindrome_iter(ord[0]));
  assert(1 == is_palindrome_rec(ord[0]));
  assert(0 == is_palindrome_iter(ord[1]));
  assert(0 == is_palindrome_rec(ord[1]));
  assert(1 == is_palindrome_iter(ord[2]));
  assert(1 == is_palindrome_rec(ord[2]));
  assert(1 == is_palindrome_iter(ord[3]));
  assert(1 == is_palindrome_rec(ord[3]));
  assert(1 == is_palindrome_iter(ord[4]));
  assert(1 == is_palindrome_rec(ord[4]));
  assert(0 == is_palindrome_iter(ord[5]));
  assert(0 == is_palindrome_rec(ord[5]));
  assert(0 == is_palindrome_iter(ord[6]));
  assert(0 == is_palindrome_rec(ord[6]));
  printf("All test passed\n");
  return 0;
}
```