user: 请将以下的汇编代码转换成C语言代码：

```asm
<hexdump>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  movzbl %dl,%ebx
  xor    %edx,%edx
  lea    -0x1(%rbx,%rsi,1),%eax
  div    %ebx
  sub    $0x28,%rsp
  imul   %ebx,%eax
  mov    %eax,0x10(%rsp)
  test   %eax,%eax
  je     L29
  mov    %esi,%r13d
  lea    -0x1(%rbx),%esi
  mov    %rdi,%r14
  mov    %esi,0x4(%rsp)
  test   %r13d,%r13d
  je     L272
  cmp    %eax,%r13d
  mov    $0x1,%r15d
  cmovbe %r13d,%eax
  sub    %ebx,%r15d
  xor    %ebp,%ebp
  mov    %r15d,0x8(%rsp)
  mov    %eax,0x14(%rsp)
  jmp    L145
  nop
L107:
  movzbl (%r14,%rbp,1),%esi
  xor    %eax,%eax
  lea    D17(%rip),%rdi
  call   <printf@plt>
  cmp    0x4(%rsp),%r15d
  je     L226
L20:
  addl   $0x1,0x8(%rsp)
  add    $0x1,%r12d
  add    $0x1,%rbp
  cmp    %ebp,0x14(%rsp)
  jbe    L133
L145:
  mov    %ebp,%eax
  xor    %edx,%edx
  mov    %ebp,%r12d
  div    %ebx
  mov    %edx,%r15d
  test   %edx,%edx
  jne    L107
  mov    %ebp,%esi
  lea    D28(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L107
  nopl   0x0(%rax,%rax,1)
L226:
  mov    0x8(%rsp),%eax
  mov    %eax,%r15d
  cmp    %r12d,%eax
  jbe    L267
  jmp    L198
  cs nopw 0x0(%rax,%rax,1)
L61:
  mov    $0x20,%edi
  call   <putchar@plt>
L88:
  add    $0x1,%r15d
  cmp    %r12d,%r15d
  ja     L198
L267:
  cmp    %r15d,%r13d
  jbe    L61
  mov    %r15d,%ecx
  add    %r14,%rcx
  movsbl (%rcx),%edi
  mov    %rcx,0x18(%rsp)
  call   <isprint@plt>
  test   %rax,%rax
  je     L5
  mov    0x18(%rsp),%rcx
  add    $0x1,%r15d
  movsbl (%rcx),%edi
  call   <putchar@plt>
  cmp    %r12d,%r15d
  jbe    L267
L198:
  mov    $0xa,%edi
  call   <putchar@plt>
  jmp    L20
  nopl   (%rax)
L5:
  mov    $0x2e,%edi
  call   <putchar@plt>
  jmp    L88
  nopl   0x0(%rax)
L29:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L133:
  cmp    %r12d,0x10(%rsp)
  jbe    L29
L42:
  mov    %r12d,%eax
  sub    %ebx,%eax
  lea    0x1(%rax),%ebp
  jmp    L290
  nopl   0x0(%rax)
L186:
  xor    %eax,%eax
  lea    D2(%rip),%rdi
  call   <printf@plt>
  cmp    %r15d,0x4(%rsp)
  je     L140
L111:
  add    $0x1,%r12d
  add    $0x1,%ebp
  cmp    %r12d,0x10(%rsp)
  jbe    L29
L290:
  mov    %r12d,%eax
  xor    %edx,%edx
  div    %ebx
  mov    %edx,%r15d
  test   %edx,%edx
  jne    L186
  mov    %r12d,%esi
  lea    D28(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L186
  nopl   0x0(%rax)
L140:
  mov    %ebp,%r15d
  cmp    %ebp,%r12d
  jae    L98
  jmp    L49
  nopw   0x0(%rax,%rax,1)
L18:
  mov    $0x20,%edi
  call   <putchar@plt>
L146:
  add    $0x1,%r15d
  cmp    %r15d,%r12d
  jb     L49
L98:
  cmp    %r15d,%r13d
  jbe    L18
  mov    %r15d,%ecx
  add    %r14,%rcx
  movsbl (%rcx),%edi
  mov    %rcx,0x8(%rsp)
  call   <isprint@plt>
  test   %rax,%rax
  je     L70
  mov    0x8(%rsp),%rcx
  add    $0x1,%r15d
  movsbl (%rcx),%edi
  call   <putchar@plt>
  cmp    %r15d,%r12d
  jae    L98
L49:
  mov    $0xa,%edi
  call   <putchar@plt>
  jmp    L111
  nopl   (%rax)
L70:
  mov    $0x2e,%edi
  call   <putchar@plt>
  jmp    L146
  nopl   0x0(%rax)
L272:
  xor    %r12d,%r12d
  jmp    L42
```

tool_calls: name: read_data
arguments: data_tag: D17
type_infered: string
name: read_data
arguments: data_tag: D28
type_infered: string
name: read_data
arguments: data_tag: D2
type_infered: string

tool: D17: %02x 

tool: D28: %04x 

tool: D2:    

assistant: ```c
void hexdump(const void *mem, unsigned int len, unsigned char columns) {
  unsigned int i, j;
  unsigned int len_roundedup = columns * ((len + columns - 1) / columns);
  for (i = 0; i < len_roundedup; i++) {
    if (i % columns == 0)
      printf("%04x ", i);
    if (i < len)
      printf("%02x ", ((char *)mem)[i] & 0xFF);
    else
      printf("   ");
    if (i % columns == (columns - 1)) {
      for (j = i - (columns - 1); j <= i; j++) {
        if (j >= len)
          putchar(' ');
        else if (isprint(((char *)mem)[j]))
          putchar(0xFF & ((char *)mem)[j]);
        else
          putchar('.');
      }
      putchar('\n');
    }
  }
}
```