user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<respond_with_file>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %rsi,-0x40(%rbp)
  movl   $0x0,-0x30(%rbp)
  movq   $0x0,-0x28(%rbp)
  lea    D16(%rip),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %rax,-0x28(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fsize@plt>
  mov    %eax,-0x2c(%rbp)
  cmpl   $0xffffffff,-0x2c(%rbp)
  jne    L74
  mov    $0xffffffff,%eax
  jmp    L7
L74:
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <readfile@plt>
  mov    %rax,-0x18(%rbp)
  cmpq   $0x0,-0x18(%rbp)
  jne    L71
  mov    $0xffffffff,%eax
  jmp    L7
L71:
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %rax,-0x28(%rbp)
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edi
  call   <numlength@plt>
  cltq
  add    %rax,-0x28(%rbp)
  mov    -0x2c(%rbp),%eax
  mov    %eax,%edi
  call   <numlength@plt>
  add    $0x12,%eax
  cltq
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x2c(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    -0x10(%rbp),%rax
  lea    D26(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  cmp    $0xffffffff,%eax
  jne    L29
  movl   $0xffffffff,-0x30(%rbp)
  jmp    L8
L29:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %rax,-0x28(%rbp)
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x18(%rbp),%rsi
  mov    -0x10(%rbp),%rcx
  mov    -0x20(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    %rsi,%r8
  lea    D28(%rip),%rsi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <sprintf@plt>
  cmp    $0xffffffff,%eax
  jne    L55
  movl   $0xffffffff,-0x30(%rbp)
  jmp    L34
L55:
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rsi
  mov    -0x34(%rbp),%eax
  mov    $0x0,%ecx
  mov    %eax,%edi
  call   <send@plt>
  cmp    $0xffffffff,%eax
  jne    L40
  movl   $0xffffffff,-0x30(%rbp)
  jmp    L34
L40:
  nop
L34:
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
L8:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x30(%rbp),%eax
L7:
  leave
  ret
```

tool_calls: name: unpack_data
arguments: label: D16
type: string
name: unpack_data
arguments: label: D26
type: string
name: unpack_data
arguments: label: D28
type: string

tool: D16: HTTP/1.1 200 OK


tool: D26: Content-Length:%d


tool: D28: %s%s
%s

assistant: ```c
int respond_with_file(int connfd, char *filename) {
  int rval = 0;
  long message_size;
  char *message;
  char *status;
  char *content_length;
  char *content;
  off_t filesize;
  message_size = 0;
  status = "HTTP/1.1 200 OK\n";
  message_size += strlen(status);
  if ((filesize = fsize(filename)) == -1) {
    return -1;
  }
  if ((content = readfile(filename)) == NULL) {
    return -1;
  }
  message_size += strlen(content);
  message_size += numlength(filesize);
  content_length = malloc((18 + numlength(filesize)) * sizeof(char));
  if (sprintf(content_length, "Content-Length:%d\n", (int)filesize - 1) == -1) {
    rval = -1;
    goto out;
  }
  message_size += strlen(content_length);
  message = malloc(message_size * sizeof(char));
  if (sprintf(message, "%s%s\n%s", status, content_length, content) == -1) {
    rval = -1;
    goto end;
  }
  if (send(connfd, message, strlen(message), 0) == -1) {
    rval = -1;
    goto end;
  }
end:
  free(message);
out:
  free(content_length);
  free(content);
  return rval;
}
```