user: 这段汇编代码用C语言表示是什么样的：

```asm
<pad_init>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %esi,%r13d
  xor    %esi,%esi
  push   %r12
  push   %rbp
  mov    %rdx,%rbp
  mov    %ecx,%edx
  push   %rbx
  sub    $0x278,%rsp
  mov    (%rdi),%r14d
  mov    %rdi,0x8(%rsp)
  mov    %rbp,%rdi
  mov    %ecx,0x4(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x268(%rsp)
  xor    %eax,%eax
  call   <memset@plt>
  test   $0x1,%r13b
  jne    L93
  test   $0x1e7,%r13d
  je     L93
L182:
  test   $0x1e6,%r13d
  je     L22
  lea    0x10(%rsp),%r15
  lea    0x60(%rsp),%rbx
  mov    %r15,%r12
  nopw   0x0(%rax,%rax,1)
L193:
  mov    %r14d,%edi
  add    $0x4,%r12
  call   <seed_step@plt>
  mov    %eax,-0x4(%r12)
  mov    %eax,%r14d
  cmp    %rbx,%r12
  jne    L193
  test   $0x2,%r13b
  jne    L0
L181:
  test   $0x4,%r13b
  jne    L101
  test   $0x20,%r13b
  jne    L166
L132:
  test   $0x80,%r13b
  jne    L155
L88:
  and    $0x100,%r13d
  jne    L101
  mov    $0x14,%esi
  mov    %r15,%rdi
  call   <reverse_bytes@plt>
  mov    0x4(%rsp),%eax
  test   %eax,%eax
  je     L22
  mov    %eax,%r12d
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L169:
  movzbl (%r15,%rax,1),%edx
  xor    %dl,0x0(%rbp,%rax,1)
  add    $0x1,%rax
  cmp    %r12,%rax
  jne    L169
L22:
  mov    0x8(%rsp),%rax
  mov    %r14d,(%rax)
  mov    $0x1,%eax
L23:
  mov    0x268(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L79
  add    $0x278,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L93:
  lea    0x60(%rsp),%r15
  lea    0x15f(%rsp),%rbx
  mov    %r15,%r12
  nopl   0x0(%rax,%rax,1)
L195:
  mov    %r14d,%edi
  add    $0x1,%r12
  call   <seed_step@plt>
  mov    %eax,%ecx
  mov    %eax,%r14d
  shr    $0x16,%eax
  imul   $0x24924929,%rax,%rax
  shr    $0x11,%ecx
  shr    $0x20,%rax
  imul   $0xe0,%eax,%eax
  sub    %eax,%ecx
  mov    %cl,-0x1(%r12)
  cmp    %r12,%rbx
  jne    L195
  lea    0x160(%rsp),%rbx
  mov    %r15,%rsi
  mov    %rbx,%rdi
  call   <enc_type_1@plt>
  mov    0x4(%rsp),%eax
  test   %eax,%eax
  je     L182
  mov    %eax,%ecx
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L20:
  movzbl (%rbx,%rax,1),%edx
  xor    %dl,0x0(%rbp,%rax,1)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L20
  jmp    L182
L101:
  mov    %r14d,%edi
  call   <seed_step@plt>
  xor    %eax,%eax
  jmp    L23
L0:
  mov    %eax,%edi
  call   <seed_step@plt>
  mov    %r15,%rdi
  mov    %eax,%esi
  mov    %eax,%r14d
  call   <enc_type_2@plt>
  jmp    L181
L155:
  mov    %r14d,%edi
  call   <seed_step@plt>
  mov    %r15,%rdi
  mov    %eax,%esi
  mov    %eax,%r14d
  call   <enc_type_80@plt>
  jmp    L88
L166:
  mov    %r14d,%edi
  call   <seed_step@plt>
  mov    %r15,%rdi
  mov    %eax,%esi
  mov    %eax,%r14d
  call   <enc_type_20@plt>
  jmp    L132
L79:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int pad_init(unsigned int *pseed, unsigned int enc_type, unsigned char *pad, unsigned int pad_size) {
  unsigned int temp, i, seed = *pseed;
  memset(pad, 0, pad_size);
  if ((enc_type & 1) || !(enc_type & 0x1E7)) {
    unsigned char key_256_in[256];
    unsigned char key_256_out[256];
    ;
    for (i = 0; i < 0xFF; i++) {
      seed = seed_step(seed);
      temp = seed >> 0x11;
      key_256_in[i] = (unsigned char)(temp % 0xE0);
    }
    enc_type_1(key_256_out, key_256_in);
    for (i = 0; i < pad_size; i++)
      pad[i] ^= key_256_out[i];
  }
  if (enc_type & 0x1E6) {
    unsigned int key_80[20];
    ;
    for (i = 0; i < 20; i++) {
      seed = seed_step(seed);
      key_80[i] = seed;
    }
    if (enc_type & 0x02) {
      ;
      seed = seed_step(seed);
      enc_type_2(key_80, seed);
    }
    if (enc_type & 0x04) {
      seed = seed_step(seed);
      return 0;
    }
    if (enc_type & 0x20) {
      ;
      seed = seed_step(seed);
      enc_type_20(key_80, seed);
    }
    if (enc_type & 0x80) {
      ;
      seed = seed_step(seed);
      enc_type_80(key_80, seed);
    }
    if (enc_type & 0x100) {
      seed = seed_step(seed);
      return 0;
    }
    reverse_bytes(key_80, 20);
    for (i = 0; i < pad_size; i++)
      pad[i] ^= ((unsigned char *)key_80)[i];
  }
  *pseed = seed;
  return 1;
}
```