user: 请从给定的汇编指令推导出C源代码:

```asm
<printhex>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  lea    D11(%rip),%r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdx,%rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,(%rsp)
  test   %rdx,%rdx
  je     L109
  mov    (%rsp),%rcx
  mov    %ecx,%edx
  cmp    $0x1,%rbp
  je     L78
  nopl   0x0(%rax)
L159:
  mov    $0x10,%eax
  mov    %ecx,%ecx
  lea    D32(%rip),%rsi
  mov    %r15,%rdi
  cmp    %rax,%rbp
  cmovbe %rbp,%rax
  lea    -0x1(%rcx,%rax,1),%rcx
  xor    %eax,%eax
  call   <fprintf@plt>
  test   %rbp,%rbp
  je     L201
  mov    (%rsp),%r13
  mov    %rbp,%r12
  mov    $0x8,%ebx
  nopl   0x0(%rax)
L62:
  movzbl 0x0(%r13),%edx
  xor    %eax,%eax
  mov    %r15,%rdi
  add    $0x1,%r13
  lea    D68(%rip),%rsi
  call   <fprintf@plt>
  sub    $0x1,%ebx
  setne  %al
  sub    $0x1,%r12
  je     L32
  test   %al,%al
  jne    L62
L127:
  mov    %r15,%rsi
  mov    $0x20,%edi
  mov    $0x8,%ebx
  call   <fputc@plt>
  test   %r12,%r12
  jne    L147
  nopl   0x0(%rax)
L2:
  mov    %r15,%rcx
  mov    $0x3,%edx
  mov    $0x1,%esi
  mov    %r14,%rdi
  call   <fwrite@plt>
  sub    $0x1,%ebx
  jne    L2
L40:
  mov    %r15,%rcx
  mov    $0x2,%edx
  mov    $0x1,%esi
  lea    D62(%rip),%rdi
  call   <fwrite@plt>
  test   %rbp,%rbp
  je     L144
  mov    (%rsp),%r13
  mov    $0x2e,%ebx
  mov    %r13,%r12
  nopl   0x0(%rax,%rax,1)
L168:
  movsbl (%r12),%edi
  add    $0x1,%r12
  mov    %r15,%rsi
  cmp    $0x1f,%dil
  cmovle %ebx,%edi
  sub    $0x1,%rbp
  call   <fputc@plt>
  mov    %r13d,%eax
  sub    %r12d,%eax
  cmp    $0xfffffff0,%eax
  je     L19
  test   %rbp,%rbp
  jne    L168
L19:
  mov    %r15,%rsi
  mov    $0xa,%edi
  call   <fputc@plt>
  test   %rbp,%rbp
  je     L109
  mov    %r12,(%rsp)
  mov    (%rsp),%rcx
  mov    %ecx,%edx
  cmp    $0x1,%rbp
  jne    L159
L78:
  lea    D48(%rip),%rcx
  mov    %r15,%rdi
  xor    %eax,%eax
  xor    %r12d,%r12d
  lea    D17(%rip),%rsi
  mov    $0x7,%ebx
  call   <fprintf@plt>
  mov    (%rsp),%rax
  lea    D68(%rip),%rsi
  mov    %r15,%rdi
  movzbl (%rax),%edx
  lea    0x1(%rax),%r13
  xor    %eax,%eax
  call   <fprintf@plt>
  jmp    L114
  nopl   0x0(%rax)
L32:
  test   %al,%al
  je     L127
L114:
  mov    %r15,%rcx
  mov    $0x3,%edx
  mov    $0x1,%esi
  mov    %r14,%rdi
  call   <fwrite@plt>
  sub    $0x1,%ebx
  jne    L114
  jmp    L127
  nop
L147:
  mov    %r13,%rcx
  mov    %rbp,0x8(%rsp)
  mov    %ebx,%ebp
  mov    %r13,%rbx
  mov    %r12,%r13
  mov    %rcx,%r12
  jmp    L85
  nopl   (%rax)
L210:
  test   %ebp,%ebp
  je     L43
L85:
  movzbl (%r12),%edx
  xor    %eax,%eax
  mov    %r15,%rdi
  add    $0x1,%r12
  lea    D68(%rip),%rsi
  sub    $0x1,%ebp
  call   <fprintf@plt>
  mov    %r13,%rax
  sub    %r12,%rax
  add    %rbx,%rax
  jne    L210
  mov    %ebp,%ebx
  mov    0x8(%rsp),%rbp
  test   %ebx,%ebx
  jne    L2
  jmp    L40
  nopl   0x0(%rax,%rax,1)
L43:
  mov    0x8(%rsp),%rbp
  jmp    L40
  nopw   0x0(%rax,%rax,1)
L201:
  mov    (%rsp),%r13
  xor    %r12d,%r12d
  mov    $0x8,%ebx
  jmp    L114
  nopl   0x0(%rax)
L144:
  add    $0x18,%rsp
  mov    %r15,%rsi
  mov    $0xa,%edi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1070 <fputc@plt>
L109:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: read_data
arguments: tag: D11
datatype: string
name: read_data
arguments: tag: D32
datatype: string
name: read_data
arguments: tag: D68
datatype: string
name: read_data
arguments: tag: D62
datatype: string
name: read_data
arguments: tag: D48
datatype: string
name: read_data
arguments: tag: D17
datatype: string

tool: D11:    

tool: D32: %08X-%08X 

tool: D68:  %02X

tool: D62:   

tool: 

tool: D17: %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");
  }
}
```