user: 请从给定的汇编指令推导出C源代码:

```asm
<parse_for_recipients>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  push   %r13
  movabs $0x100000001,%r13
  push   %r12
  mov    $0x1,%r12d
  push   %rbp
  movabs $0x4000000040000,%rbp
  push   %rbx
  sub    $0x8,%rsp
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L61
L239:
  cmp    $0xa,%cl
  je     L61
  sub    $0x42,%ecx
  cmp    $0x32,%cl
  ja     L146
  mov    %r12,%rax
  shl    %cl,%rax
  test   %rbp,%rax
  jne    L329
  test   %r13,%rax
  jne    L206
  movabs $0x200000002,%rbx
  test   %rbx,%rax
  jne    L23
L146:
  movzbl 0x1(%r15),%ecx
  lea    0x1(%r15),%rax
  nopl   0x0(%rax,%rax,1)
L72:
  test   %cl,%cl
  je     L61
  mov    %rax,%r15
  jmp    L344
  nopl   0x0(%rax)
L154:
  test   %cl,%cl
  je     L61
L344:
  add    $0x1,%r15
  mov    %ecx,%eax
  movzbl (%r15),%ecx
  cmp    $0xa,%al
  jne    L154
L26:
  test   %cl,%cl
  jne    L239
L61:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L23:
  movzbl 0x1(%r15),%edx
  test   %dl,%dl
  je     L61
  mov    %edx,%esi
  movzbl 0x2(%r15),%ecx
  lea    0x2(%r15),%rax
  and    $0xffffffdf,%esi
  cmp    $0x43,%sil
  je     L183
L209:
  cmp    $0xa,%dl
  jne    L72
  test   %cl,%cl
  je     L61
  mov    %rax,%r15
  jmp    L239
L329:
  movzbl 0x1(%r15),%edx
  test   %dl,%dl
  je     L61
  mov    %edx,%esi
  movzbl 0x2(%r15),%ecx
  lea    0x2(%r15),%rax
  and    $0xffffffdf,%esi
  cmp    $0x4f,%sil
  jne    L209
L183:
  test   %cl,%cl
  je     L61
  mov    %ecx,%edx
  xor    %ebx,%ebx
L247:
  movzbl 0x1(%rax),%ecx
  lea    0x1(%rax),%r15
  cmp    $0xa,%dl
  je     L26
  cmp    $0x3a,%dl
  jne    L154
  test   %cl,%cl
  je     L61
  mov    %r15,%rdi
  lea    0x1(%r15),%r14
  cmp    $0xa,%cl
  je     L109
L74:
  cmp    $0x2c,%cl
  je     L86
  movzbl (%r14),%ecx
  test   %cl,%cl
  je     L61
L259:
  mov    %r14,%r15
  lea    0x1(%r15),%r14
  cmp    $0xa,%cl
  jne    L74
L109:
  mov    %r15d,%esi
  sub    %edi,%esi
  call   <add_recipient@plt>
  test   %rbx,%rbx
  je     L169
  mov    %r14,%rdi
  call   <strlen@plt>
  mov    %r14,%rsi
  mov    %rbx,%rdi
  lea    0x1(%rax),%edx
  call   <memmove@plt>
  movzbl (%rbx),%ecx
  test   %cl,%cl
  je     L61
  mov    %rbx,%r15
  jmp    L239
  nop
L86:
  mov    %r15d,%esi
  sub    %edi,%esi
  call   <add_recipient@plt>
  movzbl (%r14),%ecx
  test   %cl,%cl
  je     L61
  mov    %r14,%rdi
  jmp    L259
L206:
  movzbl 0x1(%r15),%eax
  test   %al,%al
  je     L61
  mov    %eax,%edx
  movzbl 0x2(%r15),%ecx
  and    $0xffffffdf,%edx
  cmp    $0x43,%dl
  je     L124
  cmp    $0xa,%al
  je     L375
  add    $0x2,%r15
  jmp    L154
  nopl   0x0(%rax)
L124:
  test   %cl,%cl
  je     L61
  mov    %ecx,%esi
  movzbl 0x3(%r15),%edx
  lea    0x3(%r15),%rax
  and    $0xffffffdf,%esi
  cmp    $0x43,%sil
  je     L323
  cmp    $0xa,%cl
  je     L103
  test   %dl,%dl
  je     L61
  mov    %rax,%r15
  mov    %edx,%ecx
  jmp    L344
  nopl   0x0(%rax,%rax,1)
L375:
  add    $0x2,%r15
  test   %cl,%cl
  jne    L239
  jmp    L61
  nopl   0x0(%rax)
L103:
  test   %dl,%dl
  je     L61
  mov    %rax,%r15
  mov    %edx,%ecx
  jmp    L239
  nopw   0x0(%rax,%rax,1)
L323:
  test   %dl,%dl
  je     L61
  mov    %r15,%rbx
  jmp    L247
L169:
  movzbl 0x1(%r15),%ecx
  test   %cl,%cl
  je     L61
  mov    %r14,%r15
  jmp    L239
```

assistant: ```c
void parse_for_recipients(char *message) {
  int state;
  char *cp;
  char *bcc;
  char *recip = (char *)0;
  state = 0;
  bcc = (char *)0;
  for (cp = message; *cp != '\0'; ++cp) {
    switch (state) {
    case 0:
      switch (*cp) {
      case '\n':
        return;
      case 'T':
      case 't':
        state = 2;
        break;
      case 'C':
      case 'c':
        state = 3;
        break;
      case 'B':
      case 'b':
        state = 4;
        bcc = cp;
        break;
      default:
        state = 1;
        break;
      }
      break;
    case 1:
      switch (*cp) {
      case '\n':
        state = 0;
        break;
      }
      break;
    case 2:
      switch (*cp) {
      case '\n':
        state = 0;
        break;
      case 'O':
      case 'o':
        state = 6;
        break;
      default:
        state = 1;
        break;
      }
      break;
    case 3:
      switch (*cp) {
      case '\n':
        state = 0;
        break;
      case 'C':
      case 'c':
        state = 6;
        break;
      default:
        state = 1;
        break;
      }
      break;
    case 4:
      switch (*cp) {
      case '\n':
        state = 0;
        bcc = (char *)0;
        break;
      case 'C':
      case 'c':
        state = 5;
        break;
      default:
        state = 1;
        bcc = (char *)0;
        break;
      }
      break;
    case 5:
      switch (*cp) {
      case '\n':
        state = 0;
        bcc = (char *)0;
        break;
      case 'C':
      case 'c':
        state = 6;
        break;
      default:
        state = 1;
        bcc = (char *)0;
        break;
      }
      break;
    case 6:
      switch (*cp) {
      case '\n':
        state = 0;
        bcc = (char *)0;
        break;
      case ':':
        state = 7;
        recip = cp + 1;
        break;
      default:
        state = 1;
        bcc = (char *)0;
        break;
      }
      break;
    case 7:
      switch (*cp) {
      case '\n':
        add_recipient(recip, (cp - recip));
        state = 0;
        if (bcc != (char *)0) {
          (void)memmove(bcc, cp + 1, strlen(cp + 1) + 1);
          cp = bcc - 1;
          bcc = (char *)0;
        }
        break;
      case ',':
        add_recipient(recip, (cp - recip));
        recip = cp + 1;
        break;
      }
      break;
    }
  }
}
```