OpenSystemsDevelopment / qpdf

…lize type conversions, and improve clarity across multiple modules.

…jectHelper`: replace `getArrayNItems` with `size`, simplify array traversal, and centralize `empty` checks for improved clarity and efficiency.

…mplify array traversal, and centralize `empty` checks for improved clarity and efficiency.

…roduce `empty` checks, and use `std::cmp_less` and `emplace_back` for better clarity and efficiency.

…ize`, and centralize `empty` checks.

Refactor array handling in `QPDFObjectHandle`: replace `int` with `size_t` for size and index operations, introduce utility functions for type conversions, and simplify sparse array logic.

…`warn`, streamline condition handling.

… warnings, and centralize utility methods.

Refactor `ImageOptimizer`: enforce `final` overrides, switch to `uniq…

… pipelines and simplify conditions.

Refactor `ResourceFinder`: streamline logic and optimize data structu…

Allow null `callbacks` in content stream handling

Introduce null checks for `callbacks` in `QPDFObjectHandle` to allow content streams to be parsed without ParserCallbacks. Update `QPDFJob` to pass `nullptr` instead of `DiscardContents` for parsing.

Disallow `--deterministic-id` with encrypted output and improve error…

…or deterministic ID generation (fixes #1235).

Refactor `validatePDFVersion` and `findHeader`: simplify logic, impro…

…ity, and replace deprecated API usage.

Refactor `QPDF::calculateHPageOffset`: simplify loops with range-base…

…ace manual index handling, revise min/max initialization to use `std::numeric_limits`, and optimize shared identifier assignments.

Refactor QPDF::ObjUser

… numbers and related variables, replacing `int`, to enhance consistency and avoid unnecessary checked conversions.

…r,  and revise enum initialization. Clean up unused error handling in linearization logic.

Update `unparseChild` and `unparseObject` in `QPDFWriter` to use `siz…

…evel` and add `const&` to `child` parameter.

Improve linearization logic to handle invalid thumbnails gracefully a…

…bnail processing loop to ensure consistency.

Fix linearization logic to conditionally add outlines object only if …

…uring robustness against damaged PDFs.

Enhance `QPDF_objects` to ignore excessively large object stream IDs …

…eams, improving robustness against damaged PDFs.

Refactor Pl_Base64

Enhance `QPDFParser` sanity checks after xref recovery to include par…

…oding/decoding logic, and simplify usage in `JSON_writer` and `QPDF_json`.

…view` for encoding/decoding, improving memory efficiency and simplifying buffer management

…e` and `finish` logic

…cing buffered reads with direct data extraction from `InputSource`.

Refactor `NNTree` to encapsulate warning and error handling