user: 下面的汇编指令对应的C源代码是什么:

```asm
<uh_urlencode>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %ecx,-0x20(%rbp)
  movl   $0x0,-0x4(%rbp)
  movl   $0x0,-0x8(%rbp)
  jmp    L65
L46:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isalnum@plt>
  test   %rax,%rax
  jne    L70
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  je     L70
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x5f,%al
  je     L70
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  je     L70
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x7e,%al
  jne    L75
L70:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x4(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x4(%rbp)
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  movzbl (%rcx),%eax
  mov    %al,(%rdx)
  jmp    L15
L75:
  mov    -0x4(%rbp),%eax
  add    $0x2,%eax
  cmp    %eax,-0x1c(%rbp)
  jle    L67
  mov    -0x4(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x4(%rbp)
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movb   $0x25,(%rax)
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  sar    $0x4,%al
  movsbl %al,%eax
  and    $0xf,%eax
  mov    %eax,%ecx
  mov    -0x4(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x4(%rbp)
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  movslq %ecx,%rax
  lea    D3(%rip),%rcx
  movzbl (%rax,%rcx,1),%eax
  mov    %al,(%rdx)
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  and    $0xf,%eax
  mov    %eax,%ecx
  mov    -0x4(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    %edx,-0x4(%rbp)
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  movslq %ecx,%rax
  lea    D3(%rip),%rcx
  movzbl (%rax,%rcx,1),%eax
  mov    %al,(%rdx)
  jmp    L15
L67:
  movl   $0xffffffff,-0x4(%rbp)
  jmp    L41
L15:
  addl   $0x1,-0x8(%rbp)
L65:
  mov    -0x8(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jge    L41
  mov    -0x4(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jl     L46
L41:
  mov    -0x8(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jne    L7
  mov    -0x4(%rbp),%eax
  jmp    L124
L7:
  mov    $0xffffffff,%eax
L124:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: tag: D3
type_infered: string

tool: D3: 0123456789abcdef

assistant: ```c
int uh_urlencode(char *buf, int blen, const char *src, int slen) {
  int i;
  int len = 0;
  static const char hex[] = "0123456789abcdef";
  for (i = 0; (i < slen) && (len < blen); i++) {
    if (isalnum(src[i]) || (src[i] == '-') || (src[i] == '_') || (src[i] == '.') || (src[i] == '~')) {
      buf[len++] = src[i];
    } else if ((len + 3) <= blen) {
      buf[len++] = '%';
      buf[len++] = hex[(src[i] >> 4) & 15];
      buf[len++] = hex[src[i] & 15];
    } else {
      len = -1;
      break;
    }
  }
  return (i == slen) ? len : -1;
}
```