user: What is the c source code of the assembly code below:

```asm
<MCParse>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %edi,%ebp
  mov    $0x0,%r13d
  lea    D33(%rip),%r15
  lea    D27(%rip),%r14
  jmp    L150
L50:
  lea    0x1(%rbx),%r12
  mov    $0x3,%edx
  mov    %r14,%rsi
  mov    %r12,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L45
  lea    0x4(%rbx),%rdi
  call   <wskip@plt>
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,%edi
  call   <MCAddSet@plt>
  jmp    L150
L45:
  mov    $0x6,%edx
  lea    D30(%rip),%rsi
  mov    %r12,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L41
  lea    0x7(%rbx),%rdi
  call   <wskip@plt>
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,%edi
  call   <MCDelSet@plt>
  jmp    L150
L41:
  mov    $0x5,%edx
  lea    D36(%rip),%rsi
  mov    %r12,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L32
  movzbl 0x6(%rbx),%r13d
  test   %r13b,%r13b
  je     L150
  lea    0x6(%rbx),%rdi
  call   <wskip@plt>
  movzbl (%rax),%r13d
  jmp    L150
L32:
  movzbl 0x1(%rbx),%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L150
  cmpb   $0x0,0x1(%rbx)
  je     L150
  mov    %r12,%rdi
  call   <wskip@plt>
  cmpb   $0x0,(%rax)
  je     L150
  lea    D0(%rip),%rsi
  mov    %rax,%rdi
  call   <warning@plt>
  jmp    L150
L101:
  mov    %r15,%rsi
  mov    %rbx,%rdi
  call   <warning@plt>
  jmp    L150
L154:
  mov    %r12d,%edi
  call   <MCDelMsg@plt>
L150:
  mov    %ebp,%edi
  call   <get_line@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L59
  movzbl (%rbx),%edi
  cmp    $0x24,%dil
  je     L50
  test   %dil,%dil
  je     L150
  movzbl %dil,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  je     L101
  mov    %rbx,%rdi
  call   <atoi@plt>
  mov    %eax,%r12d
  mov    %rbx,%rdi
  call   <cskip@plt>
  mov    %rax,%rdi
  call   <wskip@plt>
  cmpb   $0x0,(%rax)
  je     L154
  movsbl %r13b,%edx
  mov    %rax,%rsi
  mov    %ebp,%edi
  call   <getmsg@plt>
  mov    %rax,%rsi
  mov    %r12d,%edi
  call   <MCAddMsg@plt>
  jmp    L150
L59:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: retrieve_data
arguments: label: D33
type_guessed: string
name: retrieve_data
arguments: label: D27
type_guessed: string
name: retrieve_data
arguments: label: D30
type_guessed: string
name: retrieve_data
arguments: label: D36
type_guessed: string
name: retrieve_data
arguments: label: D0
type_guessed: string

tool: D33: neither blank line nor start of a message id

tool: D27: set

tool: D30: delset

tool: D36: quote

tool: D0: unrecognized line

assistant: ```c
void MCParse(int fd) {
  char *cptr, *str;
  int setid, msgid = 0;
  char quote = 0;
  while ((cptr = get_line(fd))) {
    if (*cptr == '$') {
      ++cptr;
      if (strncmp(cptr, "set", 3) == 0) {
        cptr += 3;
        cptr = wskip(cptr);
        setid = atoi(cptr);
        MCAddSet(setid);
        msgid = 0;
      } else if (strncmp(cptr, "delset", 6) == 0) {
        cptr += 6;
        cptr = wskip(cptr);
        setid = atoi(cptr);
        MCDelSet(setid);
      } else if (strncmp(cptr, "quote", 5) == 0) {
        cptr += 5;
        if (!*cptr)
          quote = 0;
        else {
          cptr = wskip(cptr);
          if (!*cptr)
            quote = 0;
          else
            quote = *cptr;
        }
      } else if (isspace((unsigned char)*cptr)) {
        ;
      } else {
        if (*cptr) {
          cptr = wskip(cptr);
          if (*cptr)
            warning(cptr, "unrecognized line");
        }
      }
    } else {
      if (!*cptr)
        continue;
      if (isdigit((unsigned char)*cptr)) {
        msgid = atoi(cptr);
        cptr = cskip(cptr);
        cptr = wskip(cptr);
      } else {
        warning(cptr, "neither blank line nor start of a message id");
        continue;
      }
      if (!*cptr) {
        MCDelMsg(msgid);
      } else {
        str = getmsg(fd, cptr, quote);
        MCAddMsg(msgid, str);
      }
    }
  }
}
```