OpenSystemsDevelopment / qpdf

- Add warning with associated documentation links.
- Update tests to reflect the new warning messages.

- Introduce `limits_error` method in `QPDFParser` for centralized limit-related error handling.
- Enhance warnings and error messages with detailed limit identifiers (e.g., `parser-max-nesting`).
- Refactor limit checks to improve maintainability and ensure uniformity in error reporting.
- Update tests and output to reflect adjusted error handling approach.

…ted tests, documentation, and references across the codebase.

Enhance the `global` namespace by introducing `limit_errors` for tracking the number of exceeded limits. Update related tests and documentation to ensure functionality and clarity.

…pport for configurable global limits via `qpdf_global_get_uint32` and `qpdf_global_set_uint32`.

It is the user's responsibility to autoload bashcompinit. If we do it,
we may overwrite a custom complete function. If we don't do it at all,
it won't work out of the box.

This fixes debian bug
1111509, reported by Vincent Lefèvre.

Reported by Stephane Chazelas. Potentially sensitive arguments could
be leaked to the environment during completion computation.

- Replace `std::logic_error` and `std::runtime_error` with `util::assertion` and `util::no_ci_rt_error_if` for consistent error handling.

…update `CMakeLists.txt` accordingly.

…n` and simplify logic

- Replace `std::logic_error` with `util::assertion` for consistency.
- Use `using namespace qpdf` for cleaner code.
- Update `test_62` to cover `Pipeline` output method.

- Modify `traverseField` to return `bool` for identifying invalid fields.
- Add `bad_fields` set to track and handle problematic fields.
- Improve error handling for invalid parent entries.

- Add null pointer checks for schema objects.
- Refactor `checkSchemaInternal` for better readability and maintainability.
- Replace redundant error construction logic with lambda-based approach.
- Simplify array and dictionary schema handling.
- Remove unused test coverage statistics.

- Add `to_int` utility to validate integer ranges for parameters.
- Enforce range checks: `compression-level` (1-9) and `jpeg-quality` (0-100).
- Enhance test coverage for invalid parameter scenarios.

- Updated `assertion`, `internal_error_if`, and `no_ci_rt_error_if` to use templates and `std::forward`.

Fix bug in #1595

- Standardize error handling by replacing repetitive throw statements with helper functions.
- Add test coverage for new helper functions in error handling.
- Enhance maintainability and readability with concise utilities.

- Introduce distinct header guards to enable simultaneous inclusion of both headers.
- Update `README-maintainer.md` to document the changes .

- replace repetitive error handling with utility functions in BufferInputSource, OffsetBuffer, and QPDF_objects.

- Remove some "internal error" labels from errors that could be due to user logic errors.

- Updated warning messages to provide clearer descriptions of common issues ("object has offset 0", "xref entry missing") and note that these are handled gracefully by qpdf.
- Adjusted logic in `QPDF_objects.cc` to identify and process `xref` stream-specific anomalies accurately.

Fixes #1594
Fixes #1292

Utilize the GNUTLS_FIPS140_LAX around MD5 initialization.

…remove unused global variable `JOB_SCHEMA`.

Since QPDFCrypto_gnutls is a short-lived object, it makes sense
to store the current FIPS mode value, set mode to LAX and restore
the original mode in the destructor.

If FIPS is not enabled the behavior should remain unchanged.

Fixes #1566.

…th `DV` and `default_value` methods. Simplify logic, improve clarity, and update references.

…lue` for clarity, consistency, and improved readability. Update references and method documentation accordingly.

…streamline logic, update references, and improve method documentation.

…ernativeName`, and `getMappingName` with streamlined implementations using `fully_qualified_name`, `partial_name`, `alternative_name`, and `mapping_name`. Simplify logic and enhance consistency across methods.

…` with `FT` method, streamline logic, and update related references for clarity and consistency.

…le_string` method for clarity, consistency, and improved readability.

…for flexibility and consistency across FormField methods. Adjust related method implementations accordingly.

…ntation, and update references in `FormField` methods.

…consistency, and update QPDFFormFieldObjectHelper accordingly.