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

```asm
<strtol>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %edx,-0x54(%rbp)
  cmpl   $0x0,-0x54(%rbp)
  js     L175
  cmpl   $0x1,-0x54(%rbp)
  je     L175
  cmpl   $0x24,-0x54(%rbp)
  jle    L209
L175:
  movl   $0xa,-0x54(%rbp)
L209:
  mov    -0x48(%rbp),%rbx
  jmp    L165
L149:
  add    $0x1,%rbx
L165:
  movzbl (%rbx),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L149
  movzbl (%rbx),%eax
  test   %al,%al
  je     L37
  movzbl (%rbx),%eax
  cmp    $0x2d,%al
  jne    L31
  movl   $0x1,-0x40(%rbp)
  add    $0x1,%rbx
  jmp    L110
L31:
  movzbl (%rbx),%eax
  cmp    $0x2b,%al
  jne    L231
  movl   $0x0,-0x40(%rbp)
  add    $0x1,%rbx
  jmp    L110
L231:
  movl   $0x0,-0x40(%rbp)
L110:
  cmpl   $0x10,-0x54(%rbp)
  jne    L268
  movzbl (%rbx),%eax
  cmp    $0x30,%al
  jne    L268
  lea    0x1(%rbx),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <toupper@plt>
  cmp    $0x58,%al
  jne    L268
  add    $0x2,%rbx
L268:
  cmpl   $0x0,-0x54(%rbp)
  jne    L271
  movzbl (%rbx),%eax
  cmp    $0x30,%al
  jne    L24
  lea    0x1(%rbx),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <toupper@plt>
  cmp    $0x58,%al
  jne    L15
  add    $0x2,%rbx
  movl   $0x10,-0x54(%rbp)
  jmp    L271
L15:
  movl   $0x8,-0x54(%rbp)
  jmp    L271
L24:
  movl   $0xa,-0x54(%rbp)
L271:
  mov    %rbx,-0x38(%rbp)
  mov    D70(%rip),%rax
  mov    (%rax),%rax
  mov    -0x54(%rbp),%edx
  movslq %edx,%rsi
  mov    $0x0,%edx
  div    %rsi
  mov    %rax,%r14
  mov    D70(%rip),%rax
  mov    (%rax),%rax
  mov    -0x54(%rbp),%edx
  movslq %edx,%rcx
  mov    $0x0,%edx
  div    %rcx
  mov    %rdx,%rax
  mov    %eax,%r15d
  movl   $0x0,-0x3c(%rbp)
  mov    $0x0,%r13d
  movzbl (%rbx),%eax
  mov    %eax,%r12d
  jmp    L359
L134:
  movzbl %r12b,%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  je     L93
  sub    $0x30,%r12d
  jmp    L285
L93:
  movzbl %r12b,%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %rax,%rax
  je     L17
  mov    %r12d,%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <toupper@plt>
  lea    -0x37(%rax),%r12d
L285:
  movzbl %r12b,%eax
  cmp    %eax,-0x54(%rbp)
  jle    L176
  cmp    %r14,%r13
  ja     L402
  cmp    %r14,%r13
  jne    L162
  movzbl %r12b,%eax
  cmp    %eax,%r15d
  jae    L162
L402:
  movl   $0x1,-0x3c(%rbp)
  jmp    L366
L162:
  mov    -0x54(%rbp),%eax
  cltq
  imul   %rax,%r13
  movzbl %r12b,%eax
  add    %rax,%r13
L366:
  add    $0x1,%rbx
  movzbl (%rbx),%eax
  mov    %eax,%r12d
L359:
  test   %r12b,%r12b
  jne    L134
  jmp    L270
L17:
  nop
  jmp    L270
L176:
  nop
L270:
  cmp    -0x38(%rbp),%rbx
  je     L28
  cmpq   $0x0,-0x50(%rbp)
  je     L121
  mov    -0x50(%rbp),%rax
  mov    %rbx,(%rax)
L121:
  cmpl   $0x0,-0x40(%rbp)
  je     L329
  mov    D15(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
  jmp    L3
L329:
  mov    D22(%rip),%rax
  mov    (%rax),%rax
L3:
  cmp    %r13,%rax
  jae    L74
  movl   $0x1,-0x3c(%rbp)
L74:
  cmpl   $0x0,-0x3c(%rbp)
  je     L275
  mov    D14(%rip),%rax
  mov    (%rax),%edx
  mov    D0(%rip),%rax
  mov    %edx,(%rax)
  cmpl   $0x0,-0x40(%rbp)
  je     L228
  mov    D15(%rip),%rax
  mov    (%rax),%rax
  jmp    L245
L228:
  mov    D22(%rip),%rax
  mov    (%rax),%rax
  jmp    L245
L275:
  cmpl   $0x0,-0x40(%rbp)
  je     L240
  mov    %r13,%rax
  neg    %rax
  jmp    L245
L240:
  mov    %r13,%rax
  jmp    L245
L37:
  nop
  jmp    L167
L28:
  nop
L167:
  cmpq   $0x0,-0x50(%rbp)
  je     L35
  mov    -0x50(%rbp),%rax
  mov    -0x48(%rbp),%rdx
  mov    %rdx,(%rax)
L35:
  mov    $0x0,%eax
L245:
  add    $0x38,%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
long int strtol(const char *nptr, char **endptr, int base) {
  int negative;
  register unsigned long int cutoff;
  register unsigned int cutlim;
  register unsigned long int i;
  register const char *s;
  register unsigned char c;
  const char *save;
  int overflow;
  if (base < 0 || base == 1 || base > 36)
    base = 10;
  s = nptr;
  while (isspace(*s))
    ++s;
  if (*s == '\0')
    goto noconv;
  if (*s == '-') {
    negative = 1;
    ++s;
  } else if (*s == '+') {
    negative = 0;
    ++s;
  } else
    negative = 0;
  if (base == 16 && s[0] == '0' && toupper(s[1]) == 'X')
    s += 2;
  if (base == 0)
    if (*s == '0') {
      if (toupper(s[1]) == 'X') {
        s += 2;
        base = 16;
      } else
        base = 8;
    } else
      base = 10;
  save = s;
  cutoff = ULONG_MAX / (unsigned long int)base;
  cutlim = ULONG_MAX % (unsigned long int)base;
  overflow = 0;
  i = 0;
  for (c = *s; c != '\0'; c = *++s) {
    if (isdigit(c))
      c -= '0';
    else if (isalpha(c))
      c = toupper(c) - 'A' + 10;
    else
      break;
    if (c >= base)
      break;
    if (i > cutoff || (i == cutoff && c > cutlim))
      overflow = 1;
    else {
      i *= (unsigned long int)base;
      i += c;
    }
  }
  if (s == save)
    goto noconv;
  if (endptr != NULL)
    *endptr = (char *)s;
  if (i > (negative ? -(unsigned long int)LONG_MIN : (unsigned long int)LONG_MAX))
    overflow = 1;
  if (overflow) {
    errno = ERANGE;
    return negative ? LONG_MIN : LONG_MAX;
  }
  return (negative ? -i : i);
noconv:
  if (endptr != NULL)
    *endptr = (char *)nptr;
  return 0L;
}
```