user: Please show me the C implementation that matches the assembly code listed below:

```asm
<colog_use_line>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    $0x3a,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,-0x24(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    $0x3a,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,-0x20(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    $0x3a,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <atoi@plt>
  mov    %eax,-0x1c(%rbp)
  cmpl   $0x0,-0x20(%rbp)
  jne    L63
  mov    $0x0,%eax
  jmp    L2
L38:
  addq   $0x1,-0x18(%rbp)
L63:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L38
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  mov    $0x2f,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  jmp    L18
L70:
  addq   $0x1,-0x18(%rbp)
L18:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L70
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rax
  mov    $0x20,%esi
  mov    %rax,%rdi
  call   <scanpast@plt>
  mov    %rax,-0x18(%rbp)
  jmp    L43
L17:
  addq   $0x1,-0x18(%rbp)
L43:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  je     L17
  mov    -0x10(%rbp),%rax
  lea    D8(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L58
  mov    -0x18(%rbp),%rdi
  mov    -0x8(%rbp),%rcx
  mov    -0x1c(%rbp),%edx
  mov    -0x20(%rbp),%esi
  mov    -0x24(%rbp),%eax
  mov    %rdi,%r9
  mov    $0x2,%r8d
  mov    %eax,%edi
  call   <colog_received_message@plt>
  jmp    L5
L58:
  mov    -0x10(%rbp),%rax
  lea    D4(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  jne    L5
  mov    -0x18(%rbp),%rdi
  mov    -0x8(%rbp),%rcx
  mov    -0x1c(%rbp),%edx
  mov    -0x20(%rbp),%esi
  mov    -0x24(%rbp),%eax
  mov    %rdi,%r9
  mov    $0x1,%r8d
  mov    %eax,%edi
  call   <colog_sent_message@plt>
L5:
  mov    $0x0,%eax
L2:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: tag: D8
data_type: string
name: extract_symbolic_data
arguments: tag: D4
data_type: string

tool: D8: <--

tool: D4: -->

assistant: ```c
int colog_use_line(char *buffer) {
  char *wptr = buffer;
  char *vptr;
  int when;
  int what;
  int thrd;
  char *who;
  int dir;
  struct colog_module *mptr;
  wptr = scanpast(vptr = wptr, ':');
  when = atoi(vptr);
  wptr = scanpast(vptr = wptr, ':');
  what = atoi(vptr);
  wptr = scanpast(vptr = wptr, ':');
  thrd = atoi(vptr);
  if (!(what))
    return (0);
  while (*wptr == ' ')
    wptr++;
  wptr = scanpast(who = wptr, '/');
  wptr = scanpast(wptr, ' ');
  while (*wptr == ' ')
    wptr++;
  wptr = scanpast(vptr = wptr, ' ');
  while (*wptr == ' ')
    wptr++;
  if (!(strcmp(vptr, "<--")))
    colog_received_message(when, what, thrd, who, 2, wptr);
  else if (!(strcmp(vptr, "-->")))
    colog_sent_message(when, what, thrd, who, 1, wptr);
  return (0);
}
```