user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<pathexpand>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L64
  lea    D64(%rip),%rax
  mov    %rax,-0x30(%rbp)
L64:
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L36
  movzbl D3(%rip),%edx
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L193
L36:
  lea    D59(%rip),%rax
  mov    %rax,-0x28(%rbp)
  jmp    L193
L329:
  addq   $0x1,-0x28(%rbp)
L193:
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L85
  movzbl D3(%rip),%edx
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  je     L329
L85:
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  add    $0x2,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x28(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
  mov    -0x10(%rbp),%rdx
  add    %rdx,%rax
  mov    %rax,-0x20(%rbp)
  jmp    L102
L253:
  mov    -0x20(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jbe    L325
  mov    -0x20(%rbp),%rax
  sub    $0x1,%rax
  movzbl (%rax),%edx
  movzbl D3(%rip),%eax
  cmp    %al,%dl
  je     L325
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movzbl D3(%rip),%edx
  mov    %dl,(%rax)
L325:
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  jmp    L173
L289:
  mov    -0x30(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x30(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x20(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L173:
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L3
  movzbl D3(%rip),%edx
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L289
L3:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x20(%rbp),%rax
  cmp    -0x18(%rbp),%rax
  je     L140
  mov    -0x20(%rbp),%rax
  sub    -0x18(%rbp),%rax
  cmp    $0x1,%rax
  jne    L252
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L252
  subq   $0x1,-0x20(%rbp)
  jmp    L140
L252:
  mov    -0x20(%rbp),%rax
  sub    -0x18(%rbp),%rax
  cmp    $0x2,%rax
  jne    L134
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L134
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L134
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jbe    L313
  subq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jbe    L313
  subq   $0x1,-0x18(%rbp)
  jmp    L288
L241:
  subq   $0x1,-0x18(%rbp)
L288:
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jbe    L313
  movzbl D3(%rip),%edx
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L241
L313:
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jbe    L53
  addq   $0x1,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  jmp    L327
L53:
  mov    -0x8(%rbp),%rax
L327:
  mov    %rax,-0x20(%rbp)
  jmp    L140
L134:
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L140
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  mov    -0x30(%rbp),%rdx
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L140:
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L326
  addq   $0x1,-0x30(%rbp)
L102:
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L253
  jmp    L141
L326:
  nop
L141:
  mov    -0x8(%rbp),%rax
  add    $0x1,%rax
  cmp    %rax,-0x20(%rbp)
  jbe    L106
  movzbl D3(%rip),%edx
  mov    -0x20(%rbp),%rax
  sub    $0x1,%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L106
  subq   $0x1,-0x20(%rbp)
L106:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x8(%rbp),%rax
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D64
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D3
type_infered: byte
name: extract_symbolic_data
arguments: data_tag: D59
type_infered: string

tool: D64: .

tool: D3: 47

tool: 

assistant: ```c
char *pathexpand(const char *cwd, const char *path) {
  static const char SEP[] = "/";
  if (!*path)
    path = ".";
  if (!*cwd || *SEP == *path)
    cwd = "";
  while (*cwd && *SEP == *cwd)
    ++cwd;
  size_t len = strlen(cwd);
  char *out = malloc(len + 1 + strlen(path) + 1);
  char *p = strcpy(out, cwd) + len;
  for (; *path; ++path) {
    char *pl;
    if (p > out && p[-1] != *SEP)
      *p++ = *SEP;
    pl = p;
    while (*path && *SEP != *path)
      *p++ = *path++;
    *p = '\0';
    if (p == pl)
      ;
    else if (p - pl == 1 && '.' == *pl)
      --p;
    else if (p - pl == 2 && '.' == pl[0] && '.' == pl[1]) {
      if (pl > out && --pl > out)
        for (--pl; pl > out && *SEP != *pl; --pl)
          ;
      p = pl > out ? ++pl : out;
    } else if (*path)
      *p++ = *path;
    if (!*path)
      break;
  }
  if (p > out + 1 && *SEP == p[-1])
    --p;
  *p = '\0';
  return out;
}
```