pdftract/crates/pdftract-core/examples/debug/test_trailer.rs
jedarden 432514d350 wip: AcroForm improvements, debug tooling, test corpus, and fixture updates
Collects in-progress work across forms (Ch/Tx field handling, value_text
edge cases), layout corrections, stream parser fixes, conformance test
expansion, security audit test (TH-08), stream-decoder bomb fixture,
debug examples reorganization under examples/debug/, sdk module scaffold,
xtask CLI enhancements, and provenance entries for new fixtures.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-30 09:48:14 -04:00

57 lines
1.8 KiB
Rust

use pdftract_core::parser::stream::{MemorySource, PdfSource};
use pdftract_core::parser::xref;
use std::fs::File;
use std::io::Read;
fn main() {
let path = "tests/fixtures/tagged-suspects-false.pdf";
let mut file = File::open(path).unwrap();
let mut buffer = Vec::new();
file.read_to_end(&mut buffer).unwrap();
// Find startxref BEFORE moving buffer
let search_bytes = &buffer[buffer.len().saturating_sub(1024)..];
let pos = search_bytes
.windows(9)
.rposition(|w| w == b"startxref")
.unwrap();
let start = buffer.len().saturating_sub(1024) + pos + 9;
// Skip whitespace
let mut offset_start = start;
while offset_start < buffer.len() && buffer[offset_start].is_ascii_whitespace() {
offset_start += 1;
}
let mut offset_end = offset_start;
while offset_end < buffer.len() && buffer[offset_end].is_ascii_digit() {
offset_end += 1;
}
let offset_str = std::str::from_utf8(&buffer[offset_start..offset_end]).unwrap();
let start_offset: u64 = offset_str.parse().unwrap();
// Now create source
let source = MemorySource::new(buffer);
println!("startxref offset: {}", start_offset);
let xref_section = xref::load_xref_with_prev_chain(&source, start_offset);
println!("Has trailer: {}", xref_section.trailer.is_some());
if let Some(trailer) = &xref_section.trailer {
println!("Trailer keys: {:?}", trailer.keys().collect::<Vec<_>>());
println!("Root entry: {:?}", trailer.get("Root"));
println!("Size entry: {:?}", trailer.get("Size"));
}
println!("Diagnostics count: {}", xref_section.diagnostics.len());
for diag in &xref_section.diagnostics {
println!(
" - {}: {} at byte_offset {:?}",
diag.code, diag.message, diag.byte_offset
);
}
}