user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<hexdump>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movq   $0x0,-0x20(%rbp)
  movq   $0x0,-0x18(%rbp)
  movb   $0x0,-0x10(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  cmpq   $0x0,-0x38(%rbp)
  je     L16
  mov    -0x38(%rbp),%rax
  mov    %rax,%rsi
  lea    D42(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L16:
  cmpl   $0x0,-0x44(%rbp)
  jne    L117
  lea    D27(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  jmp    L60
L117:
  movl   $0x0,-0x2c(%rbp)
  jmp    L102
L56:
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  test   %eax,%eax
  jne    L65
  cmpl   $0x0,-0x2c(%rbp)
  je     L118
  lea    -0x20(%rbp),%rax
  mov    %rax,%rsi
  lea    D16(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L118:
  mov    -0x2c(%rbp),%eax
  mov    %eax,%esi
  lea    D39(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L65:
  mov    -0x2c(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,%esi
  lea    D48(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x2c(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x1f,%eax
  jle    L8
  mov    -0x2c(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x7e,%eax
  jle    L104
L8:
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  mov    %eax,%eax
  movb   $0x2e,-0x20(%rbp,%rax,1)
  jmp    L28
L104:
  mov    -0x2c(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  mov    %eax,%eax
  mov    %dl,-0x20(%rbp,%rax,1)
L28:
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  add    $0x1,%eax
  mov    %eax,%eax
  movb   $0x0,-0x20(%rbp,%rax,1)
  addl   $0x1,-0x2c(%rbp)
L102:
  mov    -0x2c(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jb     L56
  jmp    L127
L95:
  lea    D22(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  addl   $0x1,-0x2c(%rbp)
L127:
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  test   %eax,%eax
  jne    L95
  lea    -0x20(%rbp),%rax
  mov    %rax,%rsi
  lea    D16(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L60:
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L25
  call   <__stack_chk_fail@plt>
L25:
  leave
  ret
```

tool_calls: name: read_data
arguments: tag: D42
type: string
name: read_data
arguments: tag: D27
type: string
name: read_data
arguments: tag: D16
type: string
name: read_data
arguments: tag: D39
type: string
name: read_data
arguments: tag: D48
type: string
name: read_data
arguments: tag: D22
type: string

tool: D42: %s:


tool: D27:   ZERO LENGTH

tool: D16:   %s


tool: D39:   %04x 

tool: D48:  %02x

tool: D22:    

assistant: ```c
void hexdump(const char *desc, const void *addr, unsigned int len) {
  unsigned int i;
  char buff[17] = "";
  uint8_t *pc = (uint8_t *)addr;
  if (desc != NULL)
    printf("%s:\n", desc);
  if (len == 0) {
    printf("  ZERO LENGTH\n");
    return;
  }
  for (i = 0; i < len; i++) {
    if ((i % 16) == 0) {
      if (i != 0)
        printf("  %s\n", buff);
      printf("  %04x ", i);
    }
    printf(" %02x", (unsigned int)pc[i]);
    if ((pc[i] < 0x20) || (pc[i] > 0x7e))
      buff[i % 16] = '.';
    else
      buff[i % 16] = (char)pc[i];
    buff[(i % 16) + 1] = '\0';
  }
  while ((i % 16) != 0) {
    printf("   ");
    i++;
  }
  printf("  %s\n", buff);
}
```