user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x20(%rbp)
  movb   $0x0,-0x21(%rbp)
  cmpl   $0x1,-0x34(%rbp)
  jg     L88
  movl   $0x80000,-0x20(%rbp)
  jmp    L114
L88:
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  lea    -0x21(%rbp),%rcx
  lea    -0x20(%rbp),%rdx
  lea    D33(%rip),%rsi
  mov    %rax,%rdi
  call   <sscanf@plt>
L114:
  movzbl -0x21(%rbp),%eax
  movsbl %al,%eax
  cmp    $0x6d,%eax
  je     L96
  cmp    $0x6d,%eax
  jg     L84
  cmp    $0x6b,%eax
  je     L72
  cmp    $0x6b,%eax
  jg     L84
  cmp    $0x4b,%eax
  je     L72
  cmp    $0x4d,%eax
  je     L96
  jmp    L84
L72:
  mov    -0x20(%rbp),%eax
  shl    $0xa,%eax
  mov    %eax,-0x20(%rbp)
  jmp    L84
L96:
  mov    -0x20(%rbp),%eax
  shl    $0x14,%eax
  mov    %eax,-0x20(%rbp)
  nop
L84:
  lea    D7(%rip),%rax
  mov    %rax,%rsi
  lea    D26(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x20(%rbp),%eax
  cmp    $0x4,%eax
  jg     L136
  movl   $0x0,-0x1c(%rbp)
  lea    -0x1c(%rbp),%rax
  mov    %rax,%rdi
  call   <__builtin_ia32_rdrand32_step@plt>
  mov    -0x20(%rbp),%edx
  mov    -0x10(%rbp),%rcx
  lea    -0x1c(%rbp),%rax
  mov    $0x1,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
  jmp    L28
L136:
  mov    -0x20(%rbp),%eax
  pxor   %xmm0,%xmm0
  cvtsi2sd %eax,%xmm0
  movsd  D18(%rip),%xmm1
  divsd  %xmm1,%xmm0
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  call   <floor@plt>
  mov    %eax,%ecx
  mov    -0x20(%rbp),%eax
  cltd
  shr    $0x1e,%edx
  add    %edx,%eax
  and    $0x3,%eax
  sub    %edx,%eax
  add    %ecx,%eax
  mov    %eax,-0x14(%rbp)
  movl   $0x0,-0x18(%rbp)
  jmp    L70
L97:
  movl   $0x0,-0x1c(%rbp)
  lea    -0x1c(%rbp),%rax
  mov    %rax,%rdi
  call   <__builtin_ia32_rdrand32_step@plt>
  mov    -0x10(%rbp),%rdx
  lea    -0x1c(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x1,%edx
  mov    $0x4,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
  addl   $0x1,-0x18(%rbp)
L70:
  mov    -0x18(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L97
L28:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L81
  call   <__stack_chk_fail@plt>
L81:
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_tag: D33
type_guessed: string
name: unpack_data
arguments: data_tag: D7
type_guessed: string
name: unpack_data
arguments: data_tag: D26
type_guessed: string
name: unpack_data
arguments: data_tag: D18
type_guessed: byte[8]

tool: D33: %u%c

tool: D7: wb

tool: D26: out.bin

tool: {"D18": [0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x40]}

assistant: ```c
int main(int argc, char **argv) {
  int filesize = 0;
  char byte_multiplier = 0;
  if (argc <= 1) {
    filesize = 512 * 1024;
  } else {
    sscanf(argv[1], "%u%c", &filesize, &byte_multiplier);
  }
  switch (byte_multiplier) {
  case 'k':
  case 'K':
    filesize *= 1024;
    break;
  case 'm':
  case 'M':
    filesize *= 1024 * 1024;
    break;
  }
  FILE *fout = fopen("out.bin", "wb");
  if (filesize <= 4) {
    unsigned int a = 0;
    __builtin_ia32_rdrand32_step(&a);
    fwrite(&a, 1, filesize, fout);
  } else {
    int bytes = (int)floor((double)filesize / 4) + (filesize % 4);
    for (int i = 0; i < bytes; i++) {
      unsigned int a = 0;
      __builtin_ia32_rdrand32_step(&a);
      fwrite(&a, sizeof a, 1, fout);
    }
  }
  fclose(fout);
  return 0;
}
```