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

```asm
<strtol>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movl   $0x0,-0x24(%rbp)
L329:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L329
  cmpl   $0x2d,-0x28(%rbp)
  jne    L194
  movl   $0x1,-0x24(%rbp)
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x28(%rbp)
  jmp    L159
L194:
  cmpl   $0x2b,-0x28(%rbp)
  jne    L159
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x28(%rbp)
L159:
  cmpl   $0x0,-0x44(%rbp)
  je     L70
  cmpl   $0x10,-0x44(%rbp)
  jne    L91
L70:
  cmpl   $0x30,-0x28(%rbp)
  jne    L91
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  je     L120
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x58,%al
  jne    L91
L120:
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x28(%rbp)
  addq   $0x2,-0x18(%rbp)
  movl   $0x10,-0x44(%rbp)
L91:
  cmpl   $0x0,-0x44(%rbp)
  jne    L170
  cmpl   $0x30,-0x28(%rbp)
  jne    L266
  mov    $0x8,%eax
  jmp    L270
L266:
  mov    $0xa,%eax
L270:
  mov    %eax,-0x44(%rbp)
L170:
  cmpl   $0x0,-0x24(%rbp)
  je     L291
  mov    D59(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
  jmp    L126
L291:
  mov    D7(%rip),%rax
  mov    (%rax),%rax
L126:
  mov    %rax,-0x8(%rbp)
  mov    -0x44(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edx
  div    %rcx
  mov    %rdx,%rax
  mov    %eax,-0x1c(%rbp)
  mov    -0x44(%rbp),%eax
  movslq %eax,%rsi
  mov    -0x8(%rbp),%rax
  mov    $0x0,%edx
  div    %rsi
  mov    %rax,-0x8(%rbp)
  movq   $0x0,-0x10(%rbp)
  movl   $0x0,-0x20(%rbp)
L306:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %rax,%rax
  je     L44
  subl   $0x30,-0x28(%rbp)
  jmp    L129
L44:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <isalpha@plt>
  test   %rax,%rax
  je     L34
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <isupper@plt>
  test   %rax,%rax
  je     L87
  mov    $0x37,%eax
  jmp    L330
L87:
  mov    $0x57,%eax
L330:
  sub    %eax,-0x28(%rbp)
L129:
  mov    -0x28(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jge    L250
  cmpl   $0x0,-0x20(%rbp)
  js     L131
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  ja     L131
  mov    -0x10(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jne    L263
  mov    -0x28(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jle    L263
L131:
  movl   $0xffffffff,-0x20(%rbp)
  jmp    L99
L263:
  movl   $0x1,-0x20(%rbp)
  mov    -0x44(%rbp),%eax
  cltq
  mov    -0x10(%rbp),%rdx
  imul   %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x28(%rbp),%eax
  cltq
  add    %rax,-0x10(%rbp)
L99:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x28(%rbp)
  jmp    L306
L34:
  nop
  jmp    L132
L250:
  nop
L132:
  cmpl   $0x0,-0x20(%rbp)
  jns    L268
  cmpl   $0x0,-0x24(%rbp)
  je     L173
  mov    D59(%rip),%rax
  mov    (%rax),%rax
  jmp    L303
L173:
  mov    D7(%rip),%rax
  mov    (%rax),%rax
L303:
  mov    %rax,-0x10(%rbp)
  mov    D8(%rip),%rax
  mov    (%rax),%edx
  mov    D48(%rip),%rax
  mov    %edx,(%rax)
  jmp    L30
L268:
  cmpl   $0x0,-0x24(%rbp)
  je     L30
  negq   -0x10(%rbp)
L30:
  cmpq   $0x0,-0x40(%rbp)
  je     L240
  cmpl   $0x0,-0x20(%rbp)
  je     L233
  mov    -0x18(%rbp),%rax
  sub    $0x1,%rax
  jmp    L128
L233:
  mov    -0x38(%rbp),%rax
L128:
  mov    -0x40(%rbp),%rdx
  mov    %rax,(%rdx)
L240:
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
long strtol(const char *nptr, char **endptr, int base) {
  const char *s = nptr;
  unsigned long acc;
  int c;
  unsigned long cutoff;
  int neg = 0, any, cutlim;
  do {
    c = *s++;
  } while (isspace(c));
  if (c == '-') {
    neg = 1;
    c = *s++;
  } else if (c == '+')
    c = *s++;
  if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) {
    c = s[1];
    s += 2;
    base = 16;
  }
  if (base == 0)
    base = c == '0' ? 8 : 10;
  cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
  cutlim = cutoff % (unsigned long)base;
  cutoff /= (unsigned long)base;
  for (acc = 0, any = 0;; c = *s++) {
    if (isdigit(c))
      c -= '0';
    else if (isalpha(c))
      c -= isupper(c) ? 'A' - 10 : 'a' - 10;
    else
      break;
    if (c >= base)
      break;
    if ((any < 0) || (acc > cutoff) || ((acc == cutoff) && (c > cutlim)))
      any = -1;
    else {
      any = 1;
      acc *= base;
      acc += c;
    }
  }
  if (any < 0) {
    acc = neg ? LONG_MIN : LONG_MAX;
    errno = ERANGE;
  } else if (neg)
    acc = -acc;
  if (endptr != 0)
    *endptr = any ? (char *)(s - 1) : (char *)nptr;
  return (acc);
}
```