user: Demonstrate the C code that generates the assembly output below:

```asm
<mgetword>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x8,%rsp
  nopl   0x0(%rax,%rax,1)
L93:
  call   <getch@plt>
  mov    %eax,%edi
  mov    %eax,%r12d
  call   <isspace@plt>
  test   %rax,%rax
  jne    L93
  cmp    $0x2f,%r12d
  je     L159
  cmp    $0x22,%r12d
  je     L144
  cmp    $0x23,%r12d
  jne    L117
  movb   $0x23,(%rbx)
  lea    0x1(%rbx),%rbp
L171:
  call   <getch@plt>
  add    $0x1,%rbp
  mov    %al,-0x1(%rbp)
  cmp    $0xa,%al
  jne    L171
L111:
  movb   $0x0,0x0(%rbp)
  add    $0x8,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L144:
  movb   $0x22,(%rbx)
  lea    0x1(%rbx),%rbp
  jmp    L109
  nopl   0x0(%rax)
L192:
  cmpb   $0x5c,0x0(%rbp)
  je     L254
L109:
  call   <getch@plt>
  mov    %rbp,%rbx
  add    $0x1,%rbp
  mov    %al,-0x1(%rbp)
  cmp    $0x22,%al
  jne    L192
  jmp    L111
  nop
L159:
  call   <getch@plt>
  mov    %eax,%edi
  cmp    $0x2a,%eax
  jne    L155
  mov    $0x2a2f,%eax
  lea    0x2(%rbx),%rbp
  mov    %ax,(%rbx)
  jmp    L257
  nopw   0x0(%rax,%rax,1)
L163:
  mov    %rbx,%rbp
L257:
  call   <getch@plt>
  lea    0x1(%rbp),%rbx
  mov    %eax,%r12d
  mov    %al,-0x1(%rbx)
  test   %al,%al
  je     L172
  cmp    $0x2a,%r12d
  jne    L163
  call   <getch@plt>
  mov    %eax,%r12d
  cmp    $0x2f,%eax
  je     L129
  mov    %eax,%edi
  call   <ungetch@plt>
  jmp    L163
  nopw   0x0(%rax,%rax,1)
L155:
  call   <ungetch@plt>
L140:
  mov    D5(%rip),%rax
  movsbl %r12b,%edi
  mov    %rbx,%r13
  cmp    %r12d,(%rax)
  je     L258
  mov    %r12b,(%rbx)
  lea    0x1(%rbx),%r13
L258:
  call   <isalnum@plt>
  test   %eax,%eax
  jne    L244
  cmp    $0x5f,%r12d
  je     L244
  movb   $0x0,0x0(%r13)
  add    $0x8,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L244:
  lea    -0x2(%rbp),%eax
  lea    0x1(%r13,%rax,1),%r12
  cmp    $0x1,%ebp
  jle    L170
  nopl   (%rax)
L31:
  call   <getch@plt>
  mov    %al,0x0(%r13)
  movsbl %al,%edi
  call   <isalnum@plt>
  test   %eax,%eax
  jne    L138
  movzbl 0x0(%r13),%eax
  cmp    $0x5f,%al
  jne    L157
L138:
  add    $0x1,%r13
  cmp    %r12,%r13
  jne    L31
  movb   $0x0,(%r12)
  movsbl (%rbx),%r12d
L125:
  add    $0x8,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L129:
  movb   $0x2f,(%rbx)
  lea    0x2(%rbp),%rbx
L172:
  movb   $0x0,(%rbx)
  add    $0x8,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  xchg   %ax,%ax
L117:
  cmp    $0x5c,%r12d
  jne    L140
  call   <getch@plt>
  mov    %eax,%r12d
  jmp    L140
L157:
  movsbl %al,%edi
  call   <ungetch@plt>
L170:
  mov    %r13,%r12
  movb   $0x0,(%r12)
  movsbl (%rbx),%r12d
  jmp    L125
  nopl   (%rax)
L254:
  call   <getch@plt>
  mov    %al,0x0(%rbp)
  lea    0x2(%rbx),%rbp
  jmp    L109
```

assistant: ```c
int mgetword(char *word, int lim) {
  int c, d, getch(void), comment, string, directive;
  void ungetch(int);
  char *w = word;
  comment = string = directive = 0;
  while (isspace(c = getch()))
    ;
  if (c == '/') {
    if ((d = getch()) == '*') {
      comment = 1;
    } else {
      comment = 0;
      ungetch(d);
    }
  }
  if (c == '\"') {
    string = 1;
  }
  if (c == '#') {
    directive = 1;
  }
  if (c == '\\') {
    c = getch();
  }
  if (comment == 0 && string == 0 && directive == 0) {
    if (c != EOF)
      *w++ = c;
    if (!isalnum(c) && c != '_') {
      *w = '\0';
      return c;
    }
    for (; --lim > 0; w++) {
      *w = getch();
      if (!isalnum(*w) && *w != '_') {
        ungetch(*w);
        break;
      }
    }
    *w = '\0';
    return word[0];
  } else if (comment == 1) {
    *w++ = c;
    *w++ = d;
    while ((*w++ = c = getch())) {
      if (c == '*') {
        if ((c = getch()) == '/') {
          *w++ = c;
          comment = 0;
          break;
        } else {
          ungetch(c);
        }
      }
    }
    *w = '\0';
  } else if (string == 1) {
    *w++ = c;
    while ((*w++ = getch()) != '\"') {
      if (*w == '\\')
        *w++ = getch();
    }
    string = 0;
    *w = '\0';
  } else if (directive == 1) {
    *w++ = c;
    while ((*w++ = getch()) != '\n') {
      if (c == '\\') {
        *w++ = getch();
      }
    }
    directive = 0;
    *w = '\0';
  }
  return c;
}
```