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

```asm
<optionValueGet>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%r15
  mov    %rdi,0x8(%rsp)
  mov    %rsi,%r13
  mov    %edx,0x4(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  mov    (%rsi),%ebx
  call   <strlen@plt>
  cmp    %eax,%ebx
  jge    L198
  mov    0x0(%r13),%ebx
  movl   $0xffffffff,0x14(%rsp)
  movslq %ebx,%rdx
  lea    (%r15,%rdx,1),%rax
  movzbl (%rax),%edi
  test   %dil,%dil
  je     L197
  cmp    $0x2c,%dil
  je     L197
  lea    0x1(%r15,%rdx,1),%rbp
  mov    %rax,%r12
  mov    $0x0,%r15d
  mov    %rbp,%r14
  sub    %rax,%r14
  jmp    L237
L58:
  movsbl %dil,%edi
  call   <tolower@plt>
  cmp    $0x78,%al
  jne    L8
  movsbl 0x0(%rbp),%edi
  call   <isxdigit@plt>
  test   %rax,%rax
  je     L8
  cmpl   $0x0,0x4(%rsp)
  jne    L61
  mov    $0x1,%r15d
  jmp    L53
L43:
  movsbl (%r12),%edi
  call   <isxdigit@plt>
  test   %rax,%rax
  je     L258
L53:
  lea    0x1(%rbx),%eax
  add    %r14,%r12
  movzbl 0x0(%rbp),%edi
  add    $0x1,%rbp
  test   %dil,%dil
  je     L161
  cmp    $0x2c,%dil
  je     L161
  mov    %eax,%ebx
L237:
  cmp    %ebx,0x0(%r13)
  je     L58
L8:
  test   %r15d,%r15d
  jne    L43
  cmp    %ebx,0x0(%r13)
  jge    L53
  mov    $0xffffffff,%ecx
  jmp    L240
L161:
  mov    0x0(%r13),%edx
  mov    $0xffffffff,%ecx
  sub    %edx,%eax
  je     L240
  cmp    $0x1,%eax
  jne    L39
  movslq %edx,%rdx
  mov    0x8(%rsp),%rax
  movsbl (%rax,%rdx,1),%eax
  mov    %eax,0x14(%rsp)
L104:
  add    $0x2,%ebx
  cmpb   $0x0,(%r12)
  mov    $0x0,%eax
  cmove  %eax,%ebx
  mov    %ebx,0x0(%r13)
  movzbl 0x14(%rsp),%ecx
L240:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L45
  mov    %ecx,%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L39:
  lea    0x14(%rsp),%rax
  movslq %edx,%rdx
  mov    0x8(%rsp),%rsi
  lea    0x1(%rsi,%rdx,1),%rdi
  mov    %rax,%rdx
  lea    D4(%rip),%rsi
  call   <sscanf@plt>
  cmp    $0x1,%eax
  jne    L166
  cmpl   $0x7f,0x14(%rsp)
  jbe    L104
  mov    $0xffffffff,%ecx
  jmp    L240
L198:
  mov    $0xffffffff,%ecx
  jmp    L240
L197:
  mov    $0xffffffff,%ecx
  jmp    L240
L61:
  mov    $0xffffffff,%ecx
  jmp    L240
L258:
  mov    $0xffffffff,%ecx
  jmp    L240
L166:
  mov    $0xffffffff,%ecx
  jmp    L240
L45:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: label: D4
type_guessed: string

tool: D4: %x

assistant: ```c
char optionValueGet(char *option, int *index, int cOnly) {
  if (*index >= strlen(option))
    return -1;
  int i = *index;
  int hex = 0;
  unsigned int value = (unsigned int)-1;
  for (; option[i] && option[i] != ','; i++) {
    if (i == *index && tolower(option[i]) == 'x' && isxdigit(option[i + 1])) {
      if (cOnly)
        return -1;
      hex = 1;
      continue;
    }
    if (hex && !isxdigit(option[i]))
      return -1;
    if (!hex && i > *index)
      return -1;
  }
  switch ((i - *index)) {
  case 1:
    value = option[*index];
    break;
  case 0:
    return -1;
  default:
    if (sscanf(&option[*index + 1], "%x", &value) != 1)
      return -1;
    if (value > 0x7f)
      return -1;
    break;
  }
  if (option[i])
    *index = i + 1;
  else
    *index = 0;
  return (char)value;
}
```