Function FindFirstCharacter

ShellPkg/Application/Shell/Shell.c:3257–3279

Return the pointer to the first occurrence of any character from a list of characters. @param[in] String the string to parse @param[in] CharacterList the list of character to look for @param[in] EscapeCharacter An escape character to skip @return the location of the first character in the string @retval CHAR_NULL no instance of any character in CharacterList was fo

  @retval CHAR_NULL no instance of any character in CharacterList was found in String
**/
CONST CHAR16*
FindFirstCharacter(
  IN CONST CHAR16 *String,
  IN CONST CHAR16 *CharacterList,
  IN CONST CHAR16 EscapeCharacter
  )
{
  UINT32 WalkChar;
  UINT32 WalkStr;

  for (WalkStr = 0; WalkStr < StrLen(String); WalkStr++) {
    if (String[WalkStr] == EscapeCharacter) {
      WalkStr++;
      continue;
    }
    for (WalkChar = 0; WalkChar < StrLen(CharacterList); WalkChar++) {
      if (String[WalkStr] == CharacterList[WalkChar]) {
        return (&String[WalkStr]);
      }
    }
  }
  return (String + StrLen(String));
}