user: 这段汇编代码用C语言表示是什么样的?

```asm
<printhex>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  lea    D49(%rip),%r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rsi,0x8(%rsp)
  test   %rdx,%rdx
  je     L143
  mov    0x8(%rsp),%r14
  mov    %r14d,%edx
  cmp    $0x1,%r12
  je     L73
  nop
L182:
  mov    $0x10,%eax
  mov    %r14d,%ecx
  mov    %rbp,%rdi
  mov    %r12,%r15
  cmp    %rax,%r12
  lea    D47(%rip),%rsi
  mov    $0x8,%ebx
  cmovbe %r12,%rax
  lea    -0x1(%rcx,%rax,1),%rcx
  xor    %eax,%eax
  call   <fprintf@plt>
  nopl   (%rax)
L206:
  movzbl (%r14),%edx
  xor    %eax,%eax
  mov    %r13,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r14
  call   <fprintf@plt>
  sub    $0x1,%ebx
  setne  %al
  sub    $0x1,%r15
  je     L108
  test   %al,%al
  jne    L206
  mov    %r15,0x10(%rsp)
L208:
  mov    %rbp,%rsi
  mov    $0x20,%edi
  mov    $0x8,%ebx
  call   <fputc@plt>
  cmpq   $0x0,0x10(%rsp)
  jne    L40
L204:
  lea    D28(%rip),%r15
  nopl   0x0(%rax,%rax,1)
L74:
  mov    %rbp,%rcx
  mov    $0x3,%edx
  mov    $0x1,%esi
  mov    %r15,%rdi
  call   <fwrite@plt>
  sub    $0x1,%ebx
  jne    L74
L103:
  mov    %rbp,%rcx
  mov    $0x2,%edx
  mov    $0x1,%esi
  lea    D12(%rip),%rdi
  call   <fwrite@plt>
  mov    0x8(%rsp),%rbx
L149:
  movsbl (%rbx),%edi
  add    $0x1,%rbx
  mov    %rbp,%rsi
  cmp    $0x1f,%dil
  jg     L155
  mov    $0x2e,%edi
L155:
  call   <fputc@plt>
  mov    $0x10,%eax
  sub    $0x1,%r12
  sub    %ebx,%eax
  add    0x8(%rsp),%eax
  je     L101
  test   %r12,%r12
  jne    L149
L101:
  mov    %rbp,%rsi
  mov    $0xa,%edi
  call   <fputc@plt>
  test   %r12,%r12
  je     L143
  mov    %rbx,0x8(%rsp)
  mov    0x8(%rsp),%r14
  mov    %r14d,%edx
  cmp    $0x1,%r12
  jne    L182
L73:
  lea    D44(%rip),%rcx
  lea    D50(%rip),%rsi
  mov    %rbp,%rdi
  xor    %eax,%eax
  call   <fprintf@plt>
  mov    0x8(%rsp),%rax
  mov    %r13,%rsi
  mov    %rbp,%rdi
  mov    $0x7,%ebx
  lea    D28(%rip),%r15
  movzbl (%rax),%edx
  lea    0x1(%rax),%r14
  xor    %eax,%eax
  call   <fprintf@plt>
  movq   $0x0,0x10(%rsp)
  jmp    L86
  nopl   (%rax)
L108:
  mov    %r15,0x10(%rsp)
  test   %al,%al
  je     L208
  lea    D28(%rip),%r15
  nopl   0x0(%rax)
L86:
  mov    %rbp,%rcx
  mov    $0x3,%edx
  mov    $0x1,%esi
  mov    %r15,%rdi
  call   <fwrite@plt>
  sub    $0x1,%ebx
  jne    L86
  jmp    L208
  nop
L40:
  mov    %r12,0x18(%rsp)
  mov    %r14,%r15
  mov    %ebx,%r12d
  mov    0x10(%rsp),%rbx
  jmp    L69
  nopw   0x0(%rax,%rax,1)
L189:
  test   %r12d,%r12d
  je     L107
L69:
  movzbl (%r15),%edx
  xor    %eax,%eax
  mov    %r13,%rsi
  mov    %rbp,%rdi
  add    $0x1,%r15
  sub    $0x1,%r12d
  call   <fprintf@plt>
  mov    %rbx,%rax
  sub    %r15,%rax
  add    %r14,%rax
  jne    L189
  mov    %r12d,%ebx
  mov    0x18(%rsp),%r12
  test   %ebx,%ebx
  jne    L204
  jmp    L103
L143:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L107:
  mov    0x18(%rsp),%r12
  jmp    L103
```

tool_calls: name: read_data
arguments: data_tag: D49
datatype: string
name: read_data
arguments: data_tag: D47
datatype: string
name: read_data
arguments: data_tag: D28
datatype: string
name: read_data
arguments: data_tag: D12
datatype: string
name: read_data
arguments: data_tag: D44
datatype: string
name: read_data
arguments: data_tag: D50
datatype: string

tool: D49:  %02X

tool: D47: %08X-%08X 

tool: D28:    

tool: D12:   

tool: 

tool: D50: %08X %8.8s 

assistant: ```c
void printhex(FILE *output, const char *buf, size_t size) {
  int i;
  char *ptr;
  char c;
  size_t tmp;
  while (size) {
    if (size > 1) {
      fprintf(output, "%08X-%08X ", (unsigned int)buf, (unsigned int)buf + (size > 15 ? 15 : size - 1));
    } else
      fprintf(output, "%08X %8.8s ", (unsigned int)buf, "");
    ptr = (char *)buf;
    tmp = size;
    for (i = 8; i && tmp; i--, tmp--)
      fprintf(output, " %02X", (unsigned char)*ptr++);
    for (; i; i--)
      fprintf(output, "   ");
    fprintf(output, " ");
    if (tmp) {
      for (i = 8; i && tmp; i--, tmp--)
        fprintf(output, " %02X", (unsigned char)*ptr++);
    } else
      i = 8;
    for (; i; i--)
      fprintf(output, "   ");
    fprintf(output, "  ");
    for (i = 16; i && size; i--, size--) {
      c = *buf++;
      fprintf(output, "%c", c < 32 ? '.' : c);
    }
    fprintf(output, "\n");
  }
}
```