user: Please show me the C implementation that matches the assembly code listed below:

```asm
<getAlternativeFile>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    $0x1f4,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0xc(%rbp)
  cmpq   $0x0,-0x20(%rbp)
  je     L29
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  jle    L29
  mov    $0x1f3,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%rcx
  mov    -0x8(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %eax,-0xc(%rbp)
  jmp    L86
L29:
  mov    -0x8(%rbp),%rax
  lea    D76(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
  addl   $0x1,-0xc(%rbp)
L86:
  mov    $0x1f3,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%rax
  lea    D47(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncat@plt>
  mov    $0x1f2,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rcx
  mov    -0x8(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncat@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,%edx
  mov    -0xc(%rbp),%eax
  add    %edx,%eax
  add    $0x1,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <fileExists@plt>
  test   %eax,%eax
  jne    L6
  cmpq   $0x0,-0x20(%rbp)
  je     L102
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  test   %rax,%rax
  jle    L102
  mov    -0x18(%rbp),%rax
  mov    %rax,%rsi
  lea    D79(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L102:
  movl   $0x0,-0xc(%rbp)
  cmpq   $0x0,-0x28(%rbp)
  je     L85
  mov    -0x28(%rbp),%rax
  lea    D23(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strstr@plt>
  test   %eax,%eax
  jne    L85
  lea    D23(%rip),%rax
  mov    %rax,%rsi
  mov    $0x0,%edi
  call   <getMozProfilePath@plt>
  mov    %rax,-0x20(%rbp)
  jmp    L77
L85:
  lea    D25(%rip),%rax
  mov    %rax,%rsi
  mov    $0x0,%edi
  call   <getMozProfilePath@plt>
  mov    %rax,-0x20(%rbp)
L77:
  cmpq   $0x0,-0x20(%rbp)
  je     L6
  mov    $0x1f3,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x20(%rbp),%rcx
  mov    -0x8(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    %eax,-0xc(%rbp)
  mov    $0x1f3,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%rax
  lea    D47(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncat@plt>
  mov    $0x1f2,%eax
  sub    -0xc(%rbp),%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rcx
  mov    -0x8(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncat@plt>
L6:
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <fileExists@plt>
  test   %eax,%eax
  jne    L62
  mov    -0x8(%rbp),%rax
  lea    D77(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
L62:
  mov    -0x8(%rbp),%rax
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_label: D76
type_infered: string
name: disassemble_data
arguments: data_label: D47
type_infered: string
name: disassemble_data
arguments: data_label: D79
type_infered: string
name: disassemble_data
arguments: data_label: D23
type_infered: string
name: disassemble_data
arguments: data_label: D25
type_infered: string
name: disassemble_data
arguments: data_label: D77
type_infered: string

tool: D76: .

tool: D47: /

tool: D79: [!] Could NOT use the path specified to search for %s


tool: D23: /.thunderbird/

tool: D25: /.mozilla/firefox/

tool: 

assistant: ```c
char *getAlternativeFile(const char *filename, char *profilePath, char *lastPath) {
  char *ret = (char *)malloc(500);
  unsigned int retSize = 0;
  if (profilePath != NULL && strlen(profilePath) > 0) {
    strncpy(ret, profilePath, 500 - retSize - 1);
    retSize += strlen(profilePath);
  } else {
    strcpy(ret, ".");
    retSize++;
  }
  strncat(ret, "/", 500 - retSize - 1);
  strncat(ret, filename, 500 - retSize - 2);
  retSize += strlen(filename) + 1;
  if (!fileExists(ret)) {
    if (profilePath != NULL && strlen(profilePath) > 0) {
      printf("[!] Could NOT use the path specified to search for %s\n", filename);
    }
    retSize = 0;
    if (lastPath && !strstr(lastPath, "/.thunderbird/")) {
      profilePath = getMozProfilePath(0, "/.thunderbird/");
    } else {
      profilePath = getMozProfilePath(0, "/.mozilla/firefox/");
    }
    if (profilePath != NULL) {
      strncpy(ret, profilePath, 500 - retSize - 1);
      retSize += strlen(profilePath);
      strncat(ret, "/", 500 - retSize - 1);
      strncat(ret, filename, 500 - retSize - 2);
    }
  }
  if (!fileExists(ret)) {
    strcpy(ret, "");
  }
  return ret;
}
```