/* 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 string algorithms

 *

 * Tests string manipulation, escaping, and processing functions.

 */

#include <cstddef>

#include <cstdint>

#include <string>

#include <vector>

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

static constexpr size_t kMaxInputSize = 16 * 1024;

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

{

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

    return 0;

  }

  std::string input(reinterpret_cast<char const*>(data), size);

  // Test string manipulation functions

  (void)cmTrimWhitespace(input);

  (void)cmRemoveQuotes(input);

  (void)cmEscapeQuotes(input);

  // Test case conversion

  (void)cmSystemTools::UpperCase(input);

  (void)cmSystemTools::LowerCase(input);

  // Test tokenization

  std::vector<std::string> tokens = cmTokenize(input, " \t\n\r");

  (void)tokens.size();

  // Test with different separators if input is large enough

  if (size > 4) {

    std::string sep(reinterpret_cast<char const*>(data), 2);

    std::string str(reinterpret_cast<char const*>(data + 2), size - 2);

    std::vector<std::string> parts = cmTokenize(str, sep);

    (void)parts.size();

  }

  // Test join operations

  if (!tokens.empty()) {

    (void)cmJoin(tokens, ";");

    (void)cmJoin(tokens, ",");

  }

  // Test string contains

  if (size > 2) {

    std::string haystack(reinterpret_cast<char const*>(data), size / 2);

    std::string needle(reinterpret_cast<char const*>(data + size / 2),

                       size - size / 2);

    (void)cmHasPrefix(haystack, needle);

    (void)cmHasSuffix(haystack, needle);

  }

  // Test path operations

  (void)cmSystemTools::GetFilenameWithoutExtension(input);

  (void)cmSystemTools::GetFilenameExtension(input);

  (void)cmSystemTools::GetFilenameName(input);

  (void)cmSystemTools::GetFilenameLastExtension(input);

  (void)cmSystemTools::GetFilenamePath(input);

  // Test path normalization

  (void)cmSystemTools::CollapseFullPath(input);

  return 0;

}