user: Translate the below assembly code into C programming language:

```asm
<printf>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%r14
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  movzbl (%rdi),%edi
  test   %dil,%dil
  je     L18
  lea    0x8(%rbp),%rbx
  lea    -0x41(%rbp),%r12
  jmp    L140
L186:
  cmp    $0x78,%al
  jne    L181
  lea    0x4(%rbx),%r15
  mov    (%rbx),%r14d
  mov    $0x1c,%ebx
L120:
  mov    %r14d,%eax
  mov    %ebx,%ecx
  sar    %cl,%eax
  and    $0xf,%eax
  lea    0x37(%rax),%edx
  lea    0x30(%rax),%edi
  cmp    $0xa,%eax
  cmovge %edx,%edi
  call   <putchar@plt>
  sub    $0x4,%ebx
  cmp    $0xfffffffc,%ebx
  jne    L120
  mov    %r15,%rbx
  mov    %r13,%r14
  jmp    L213
L178:
  lea    0x4(%rbx),%r14
  movsbl (%rbx),%edi
  call   <putchar@plt>
  mov    %r14,%rbx
  mov    %r13,%r14
  jmp    L213
L130:
  lea    0x4(%rbx),%r14
  movslq (%rbx),%rbx
  movzbl (%rbx),%edi
  test   %dil,%dil
  je     L149
L179:
  add    $0x1,%rbx
  movsbl %dil,%edi
  call   <putchar@plt>
  movzbl (%rbx),%edi
  test   %dil,%dil
  jne    L179
  mov    %r14,%rbx
  mov    %r13,%r14
  jmp    L213
L181:
  mov    $0x3f,%edi
  call   <putchar@plt>
  mov    %r13,%r14
  jmp    L213
L182:
  add    $0x1,%r14
  movsbl %dil,%edi
  call   <putchar@plt>
L213:
  movzbl (%r14),%edi
  test   %dil,%dil
  je     L18
L140:
  cmp    $0x25,%dil
  jne    L182
  lea    0x2(%r14),%r13
  movzbl 0x1(%r14),%eax
  cmp    $0x73,%al
  je     L130
  jg     L186
  cmp    $0x63,%al
  je     L178
  cmp    $0x64,%al
  jne    L181
  lea    0x4(%rbx),%r14
  mov    (%rbx),%edx
  lea    -0x41(%rbp),%rbx
L168:
  sub    $0x1,%rbx
  movslq %edx,%rax
  imul   $0x66666667,%rax,%rax
  sar    $0x22,%rax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  lea    (%rax,%rax,4),%ecx
  add    %ecx,%ecx
  sub    %ecx,%edx
  add    $0x30,%edx
  mov    %dl,(%rbx)
  mov    %eax,%edx
  test   %eax,%eax
  jne    L168
  cmp    %r12,%rbx
  jae    L98
L1:
  add    $0x1,%rbx
  movsbl -0x1(%rbx),%edi
  call   <putchar@plt>
  cmp    %r12,%rbx
  jne    L1
L98:
  mov    %r14,%rbx
  mov    %r13,%r14
  jmp    L213
L149:
  mov    %r14,%rbx
  mov    %r13,%r14
  jmp    L213
L18:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L174
  add    $0x28,%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L174:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void printf(const char *fmt, ...) {
  int *stack_head = __builtin_frame_address(0);
  stack_head += 2;
  while (*fmt) {
    if (*fmt == '%') {
      fmt++;
      switch (*fmt++) {
      case 'c':
        putchar(*stack_head++);
        break;
      case 's': {
        const char *s = (char *)*stack_head++;
        while (*s) {
          putchar(*s++);
        }
        break;
      }
      case 'x': {
        int num = *stack_head++;
        int shift = 28;
        while (shift >= 0) {
          int hd = (num >> shift) & 0xf;
          if (hd > 9)
            hd += 'A' - 10;
          else
            hd += '0';
          putchar(hd);
          shift -= 4;
        }
        break;
      }
      case 'd': {
        int num = *stack_head++;
        char buf[16];
        char *s = buf + (sizeof(buf) / sizeof(buf[0])) - 1;
        char *e = s;
        do {
          *--s = '0' + num % 10;
        } while (num /= 10);
        while (s < e)
          putchar(*s++);
        break;
      }
      default:
        putchar('?');
      }
    } else {
      putchar(*fmt++);
    }
  }
}
```