user: 下面的汇编指令对应的C源代码是什么:

```asm
<return_var_plus_index>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %esi,-0x4c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x28,%edi
  call   <malloc@plt>
  mov    %rax,-0x38(%rbp)
  cmpl   $0x0,-0x4c(%rbp)
  js     L36
  mov    -0x48(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L92
L36:
  mov    -0x38(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x38(%rbp),%rax
  jmp    L45
L92:
  movl   $0x0,-0x3c(%rbp)
  jmp    L86
L57:
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L68
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L54
L68:
  subl   $0x1,-0x3c(%rbp)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movb   $0x2e,(%rax)
  mov    -0x4c(%rbp),%edx
  lea    -0x30(%rbp),%rax
  lea    D7(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  cmpl   $0x63,-0x4c(%rbp)
  jle    L107
  cmpl   $0xe,-0x3c(%rbp)
  jg     L107
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x30(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x2f(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x2e(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x5(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x38(%rbp),%rax
  jmp    L45
L107:
  cmpl   $0x9,-0x4c(%rbp)
  jle    L21
  cmpl   $0xf,-0x3c(%rbp)
  jg     L21
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x30(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x2f(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x4(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x38(%rbp),%rax
  jmp    L45
L21:
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x30(%rbp),%eax
  mov    %al,(%rdx)
  mov    -0x3c(%rbp),%eax
  cltq
  lea    0x3(%rax),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x38(%rbp),%rax
  jmp    L45
L54:
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    -0x3c(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x38(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x3c(%rbp)
L86:
  cmpl   $0x10,-0x3c(%rbp)
  jle    L57
  mov    -0x3c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x38(%rbp),%rax
L45:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L6
  call   <__stack_chk_fail@plt>
L6:
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_tag: D7
datatype: string

tool: D7: %d


assistant: ```c
char *return_var_plus_index(char *varname, int index) {
  int yo;
  char *whole;
  char num[40];
  whole = (char *)malloc(40);
  if (index < 0 || varname[0] == 0) {
    whole[0] = 0;
    return whole;
  }
  for (yo = 0; yo < 17; yo++) {
    if (varname[yo] == '\0' || varname[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] = varname[yo];
  }
  whole[yo] = '\0';
  return whole;
}
```