user: 这段汇编代码用C语言表示是什么样的？

```asm
<parse_line>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x14(%rbp)
  mov    $0x0,%eax
  call   <entry_malloc@plt>
  mov    %rax,-0x10(%rbp)
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_client_field@plt>
  test   %eax,%eax
  jne    L27
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L27:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_identity_field@plt>
  test   %eax,%eax
  jne    L170
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L170:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_user_id_field@plt>
  test   %eax,%eax
  jne    L142
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L142:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_time_field@plt>
  test   %eax,%eax
  jne    L139
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L139:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_request_field@plt>
  test   %eax,%eax
  jne    L35
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L35:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_status_code_field@plt>
  test   %eax,%eax
  jne    L181
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L181:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_size_field@plt>
  test   %eax,%eax
  jne    L174
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L174:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_referer_field@plt>
  test   %eax,%eax
  jne    L19
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L19:
  lea    -0x14(%rbp),%rdx
  mov    -0x28(%rbp),%rcx
  mov    -0x10(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <parse_user_agent_field@plt>
  test   %eax,%eax
  jne    L11
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free_entry@plt>
  mov    $0x0,%eax
  jmp    L43
L11:
  mov    -0x10(%rbp),%rax
L43:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L70
  call   <__stack_chk_fail@plt>
L70:
  leave
  ret
```

assistant: ```c
struct log_file_entry *parse_line(const char *line) {
  struct log_file_entry *entry;
  int current_position = 0;
  entry = entry_malloc();
  if (!parse_client_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_identity_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_user_id_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_time_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_request_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_status_code_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_size_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_referer_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  if (!parse_user_agent_field(entry, line, &current_position)) {
    free_entry(entry);
    return NULL;
  }
  return entry;
}
```