/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

/*

 * Fuzzer for CMake's pkg-config file parser

 *

 * CMake parses .pc files (pkg-config) when using PkgConfig find module.

 * Malformed .pc files from untrusted sources could trigger vulnerabilities.

 *

 * Coverage targets:

 * - Variable definitions (key=value)

 * - Keyword definitions (key: value)

 * - Variable references (${var})

 * - Multi-line handling

 * - Comment handling

 */

#include <cstddef>

#include <cstdint>

#include <string>

#include <vector>

#include "cmPkgConfigParser.h"

// Limit input size

static constexpr size_t kMaxInputSize = 64 * 1024; // 64KB

extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)

{

  if (size == 0 || size > kMaxInputSize) {

    return 0;

  }

  // cmPkgConfigParser::Parse takes non-const buffer (may modify in place)

  std::vector<char> buffer(data, data + size);

  cmPkgConfigParser parser;

  // Parse the input

  auto result = parser.Parse(buffer.data(), buffer.size());

  (void)result;

  // Finish parsing

  result = parser.Finish();

  (void)result;

  // Access parsed data to exercise accessors

  auto& entries = parser.Data();

  for (auto const& entry : entries) {

    (void)entry.IsVariable;

    (void)entry.Key;

    for (auto const& elem : entry.Val) {

      (void)elem.IsVariable;

      (void)elem.Data;

    }

  }

  return 0;

}