user: Converte this assembly snippet into its equivalent C code:

```asm
<return_var_and_index>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %esi,-0x3c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x14,%edi
  call   <malloc@plt>
  mov    %rax,-0x28(%rbp)
  cmpl   $0x0,-0x3c(%rbp)
  js     L117
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L19
L117:
  mov    -0x28(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  jmp    L64
L19:
  movl   $0x0,-0x2c(%rbp)
  jmp    L90
L69:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L138
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L65
L138:
  subl   $0x1,-0x2c(%rbp)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x2e,(%rax)
  mov    -0x3c(%rbp),%edx
  lea    -0x20(%rbp),%rax
  lea    D1(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  cmpl   $0x63,-0x3c(%rbp)
  jle    L16
  cmpl   $0xe,-0x2c(%rbp)
  jg     L16
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x20(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x1f(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x1e(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x5(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  jmp    L64
L16:
  cmpl   $0x9,-0x3c(%rbp)
  jle    L33
  cmpl   $0xf,-0x2c(%rbp)
  jg     L33
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x20(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x1f(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  jmp    L64
L33:
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x20(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
  jmp    L64
L65:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    -0x2c(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x28(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x2c(%rbp)
L90:
  cmpl   $0x10,-0x2c(%rbp)
  jle    L69
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x28(%rbp),%rax
L64:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L38
  call   <__stack_chk_fail@plt>
L38:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D1
datatype: string

tool: D1: %d


assistant: ```c
char *return_var_and_index(char *vname, int index) {
  int yo;
  char *whole;
  char num[20];
  whole = malloc(20);
  if (index < 0 || vname[0] == 0) {
    whole[0] = 0;
    return whole;
  }
  for (yo = 0; yo < 17; yo++) {
    if (vname[yo] == '\0' || vname[yo] == ' ') {
      yo -= 1;
      whole[yo + 1] = '.';
      sprintf(num, "%d\n", index);
      if (index > 99 && yo < 15) {
        whole[yo + 2] = num[0];
        whole[yo + 3] = num[1];
        whole[yo + 4] = num[2];
        whole[yo + 5] = '\0';
        return whole;
      } else if (index > 9 && yo < 16) {
        whole[yo + 2] = num[0];
        whole[yo + 3] = num[1];
        whole[yo + 4] = '\0';
        return whole;
      } else {
        whole[yo + 2] = num[0];
        whole[yo + 3] = '\0';
        return whole;
      }
    }
    whole[yo] = vname[yo];
  }
  whole[yo] = '\0';
  return whole;
}
```