formats/pdf/number_validator.h

// Copyright 2026 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#ifndef THIRD_PARTY_CREDENTIO_FORMATS_PDF_NUMBER_VALIDATOR_H_
#define THIRD_PARTY_CREDENTIO_FORMATS_PDF_NUMBER_VALIDATOR_H_

#include "absl/strings/string_view.h"

namespace credentio {

// Returns true if the string is a valid representation of a real number in PDF.
// This supports typical real numbers conformant to PDF specifications, with
// optional decimal point, signs, and scientific notation (e.g. 1.23e-4 or
// -12.34E+2).
bool IsValidRealNumber(absl::string_view s);

// Returns true if the string is a valid representation of a hexadecimal string
// in PDF. Allowed characters include hex digits, whitespaces, and null chars.
bool IsValidHexadecimalString(absl::string_view s);

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_FORMATS_PDF_NUMBER_VALIDATOR_H_