user: 这段汇编代码用C语言表示是什么样的:

```asm
<parameters_prepare>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,%rbp
  mov    %rsi,%r12
  call   <strlen@plt>
  mov    %eax,%r13d
  test   %eax,%eax
  jne    L82
L3:
  mov    %r13d,%eax
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L82:
  mov    $0x1000,%edi
  call   <malloc@plt>
  mov    %rax,(%r12)
  test   %r13d,%r13d
  jle    L86
  mov    $0x0,%edx
  mov    $0x0,%r15d
  mov    $0x1,%r14d
  mov    $0x0,%ebx
  jmp    L6
L193:
  cmp    $0x5c,%al
  jne    L134
  movzbl 0x1(%rbp,%rcx,1),%eax
  test   %al,%al
  je     L182
  cmp    $0x6e,%al
  je     L272
  jg     L189
  cmp    $0x3f,%al
  je     L287
  jle    L58
  cmp    $0x5c,%al
  je     L287
L268:
  add    $0x1,%ebx
  jmp    L182
L58:
  cmp    $0x22,%al
  je     L287
  cmp    $0x27,%al
  jne    L268
L287:
  movslq %ebx,%rax
  movzbl 0x1(%rbp,%rax,1),%esi
  movslq %r14d,%rax
  movslq %edx,%rcx
  mov    -0x8(%r12,%rax,8),%rax
  mov    %sil,(%rax,%rcx,1)
  add    $0x1,%edx
  add    $0x1,%ebx
  jmp    L182
L189:
  cmp    $0x74,%al
  jne    L268
  movslq %r14d,%rax
  movslq %edx,%rcx
  mov    -0x8(%r12,%rax,8),%rax
  movb   $0x9,(%rax,%rcx,1)
  add    $0x1,%edx
  add    $0x1,%ebx
  jmp    L287
L272:
  movslq %r14d,%rax
  movslq %edx,%rcx
  mov    -0x8(%r12,%rax,8),%rax
  movb   $0xa,(%rax,%rcx,1)
  add    $0x1,%edx
  add    $0x1,%ebx
  jmp    L182
L19:
  test   %r15d,%r15d
  jne    L217
  mov    $0x1,%r15d
  jmp    L182
L217:
  movslq %r14d,%r15
  movslq %edx,%rax
  mov    %rax,%rdi
  mov    -0x8(%r12,%r15,8),%rax
  mov    %rdi,(%rsp)
  movb   $0x0,(%rax,%rdi,1)
  add    $0x1,%r14d
  mov    $0x1000,%edi
  call   <malloc@plt>
  mov    %rax,(%r12,%r15,8)
  mov    (%rsp),%rdi
  movb   $0x0,(%rax,%rdi,1)
  mov    $0x0,%edx
  mov    $0x0,%r15d
  jmp    L182
L100:
  movslq %r14d,%rax
  movslq %edx,%rdx
  mov    %rax,(%rsp)
  mov    -0x8(%r12,%rax,8),%rax
  mov    %rdx,0x8(%rsp)
  movb   $0x0,(%rax,%rdx,1)
  add    $0x1,%r14d
  mov    $0x1000,%edi
  call   <malloc@plt>
  mov    (%rsp),%rsi
  mov    %rax,(%r12,%rsi,8)
  mov    0x8(%rsp),%rdx
  movb   $0x0,(%rax,%rdx,1)
  mov    %r15d,%edx
  jmp    L182
L151:
  movslq %r14d,%rcx
  movslq %edx,%rsi
  mov    -0x8(%r12,%rcx,8),%rcx
  mov    %al,(%rcx,%rsi,1)
  add    $0x1,%edx
  jmp    L182
L134:
  movslq %r14d,%rcx
  movslq %edx,%rsi
  mov    -0x8(%r12,%rcx,8),%rcx
  mov    %al,(%rcx,%rsi,1)
  add    $0x1,%edx
L182:
  add    $0x1,%ebx
  cmp    %ebx,%r13d
  jle    L73
L6:
  movslq %ebx,%rcx
  movzbl 0x0(%rbp,%rcx,1),%eax
  cmp    $0x22,%al
  je     L19
  jg     L193
  cmp    $0x9,%al
  je     L129
  cmp    $0x20,%al
  jne    L134
L129:
  test   %r15d,%r15d
  jne    L151
  test   %edx,%edx
  jne    L100
  mov    %edx,%r15d
  jmp    L182
L86:
  mov    $0x0,%edx
  mov    $0x1,%r14d
L73:
  movslq %r14d,%rax
  lea    -0x8(%r12,%rax,8),%rax
  movslq %edx,%rdx
  mov    (%rax),%rcx
  movb   $0x0,(%rcx,%rdx,1)
  mov    (%rax),%rdi
  mov    %r14d,%r13d
  cmpb   $0x0,(%rdi)
  jne    L3
  call   <free@plt>
  lea    -0x1(%r14),%r13d
  jmp    L3
```

assistant: ```c
int parameters_prepare(char *param, char *argv[]) {
  int i, param_len;
  int argc = 1;
  int quote = 0;
  int argv_len;
  param_len = strlen(param);
  if (param_len == 0)
    return 0;
  argv[0] = (char *)malloc(4096);
  argv_len = 0;
  for (i = 0; i < param_len; i++) {
    switch (param[i]) {
    case '\\':
      if (param[i + 1] != '\0') {
        switch (param[i + 1]) {
        case 'n':
          argv[argc - 1][argv_len] = '\n';
          argv_len++;
          i++;
          break;
        case 't':
          argv[argc - 1][argv_len] = '\t';
          argv_len++;
          i++;
        case '\\':
        case '\'':
        case '"':
        case '?':
          argv[argc - 1][argv_len] = param[i + 1];
          argv_len++;
          i++;
          break;
        default:
          i++;
        };
      }
      break;
    case '"':
      if (quote == 0)
        quote = 1;
      else {
        quote = 0;
        argv[argc - 1][argv_len] = '\0';
        argc++;
        argv[argc - 1] = (char *)malloc(4096);
        argv[argc - 1][argv_len] = '\0';
        argv_len = 0;
      }
      break;
    case 9:
    case 32:
      if (quote == 0) {
        if ((param[i + 1] != 32) || (param[i + 1] != 9)) {
          if (argv_len != 0) {
            argv[argc - 1][argv_len] = '\0';
            argc++;
            argv[argc - 1] = (char *)malloc(4096);
            argv[argc - 1][argv_len] = '\0';
            argv_len = 0;
          }
        }
      } else {
        argv[argc - 1][argv_len] = param[i];
        argv_len++;
      }
      break;
    default:
      argv[argc - 1][argv_len] = param[i];
      argv_len++;
      break;
    };
  }
  argv[argc - 1][argv_len] = '\0';
  if (strlen(argv[argc - 1]) == 0) {
    free(argv[argc - 1]);
    argc--;
  }
  return argc;
}
```