user: What would the C source look like for the assembly code provided here:

```asm
<cmml_tstr_fix>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  je     L23
  mov    %rsp,%rdx
  lea    D67(%rip),%rsi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D28(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D25(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D9(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D24(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D39(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D42(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D36(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L23
  mov    %rsp,%rdx
  lea    D38(%rip),%rsi
  mov    %rbx,%rdi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  je     L33
  mov    %rbx,%rdi
  call   <fix_npt_str@plt>
  mov    %rax,%rbp
  mov    %rax,%rbx
  test   %rax,%rax
  je     L23
  mov    %rax,%rdi
  call   <strlen@plt>
  lea    0x1(%rax),%rdi
  call   <emalloc@plt>
  mov    %rax,%rbx
  mov    $0x0,%eax
L61:
  cltq
  movb   $0x0,(%rbx,%rax,1)
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <strcat@plt>
L23:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L15
  mov    %rbx,%rax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  ret
L33:
  lea    0x4(%rbx),%rdi
  call   <fix_npt_str@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L60
  mov    %rax,%rdi
  call   <strlen@plt>
  lea    0x5(%rax),%rdi
  call   <emalloc@plt>
  mov    %rax,%rbx
  mov    $0x4,%edx
  lea    D90(%rip),%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    $0x4,%eax
  jmp    L61
L60:
  mov    %rax,%rbx
  jmp    L23
L15:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D67
type_guessed: string
name: retrieve_data
arguments: label: D28
type_guessed: string
name: retrieve_data
arguments: label: D25
type_guessed: string
name: retrieve_data
arguments: label: D9
type_guessed: string
name: retrieve_data
arguments: label: D24
type_guessed: string
name: retrieve_data
arguments: label: D39
type_guessed: string
name: retrieve_data
arguments: label: D42
type_guessed: string
name: retrieve_data
arguments: label: D36
type_guessed: string
name: retrieve_data
arguments: label: D38
type_guessed: string
name: retrieve_data
arguments: label: D90
type_guessed: string

tool: D67: smpte-24:%16s

tool: D28: smpte-24-drop:%16s

tool: D25: smpte-25:%16s

tool: D9: smpte-30:%16s

tool: D24: smpte-30-drop:%16s

tool: D39: smpte-50:%16s

tool: D42: smpte-60:%16s

tool: D36: smpte-60-drop:%16s

tool: D38: npt:%16s

tool: D90: npt:

assistant: ```c
char *cmml_tstr_fix(const char *str) {
  char timespec[16];
  char *fix_timespec = NULL;
  char *full_timespec = NULL;
  int speclen = 0;
  if (str == NULL) {
    return NULL;
  }
  if ((sscanf(str, "smpte-24:%16s", timespec) == 1) || (sscanf(str, "smpte-24-drop:%16s", timespec) == 1) || (sscanf(str, "smpte-25:%16s", timespec) == 1) || (sscanf(str, "smpte-30:%16s", timespec) == 1) || (sscanf(str, "smpte-30-drop:%16s", timespec) == 1) || (sscanf(str, "smpte-50:%16s", timespec) == 1) || (sscanf(str, "smpte-60:%16s", timespec) == 1) || (sscanf(str, "smpte-60-drop:%16s", timespec) == 1)) {
    return (char *)str;
  }
  if (sscanf(str, "npt:%16s", timespec) == 1) {
    speclen = 4;
    fix_timespec = fix_npt_str(str + speclen);
  } else {
    speclen = 0;
    fix_timespec = fix_npt_str(str);
  }
  if (fix_timespec == NULL)
    return NULL;
  full_timespec = (char *)emalloc(strlen(fix_timespec) + speclen + 1);
  if (speclen > 0) {
    strncpy(full_timespec, "npt:", 4);
  }
  full_timespec[speclen] = '\0';
  strcat(full_timespec, fix_timespec);
  return full_timespec;
}
```