From ec460f85df37f2dec67021c526756484948c05c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20V=C3=B6gele?= <develop@manuel-voegele.de>
Date: Tue, 29 Mar 2022 10:22:01 +0200
Subject: [PATCH] Initial commit

---
 .editorconfig |  7 ++++++
 .gitignore    |  1 +
 Cargo.lock    | 42 ++++++++++++++++++++++++++++++++++++
 Cargo.toml    |  9 ++++++++
 rustfmt.toml  |  1 +
 src/main.rs   | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 120 insertions(+)
 create mode 100644 .editorconfig
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 rustfmt.toml
 create mode 100644 src/main.rs

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..35c5fb2
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+root = true
+
+[*]
+end_of_line = lf
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a8a1b99
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,42 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "memchr"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+
+[[package]]
+name = "pdfextractor"
+version = "0.1.0"
+dependencies = [
+ "regex",
+]
+
+[[package]]
+name = "regex"
+version = "1.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a11647b6b25ff05a515cb92c365cec08801e83423a235b51e231e1808747286"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..67dc7c0
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "pdfextractor"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+regex = "*"
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d4a3d0d
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,60 @@
+use std::{
+	env::args,
+	fs::File,
+	io::{Read, Write},
+	path::PathBuf,
+};
+
+use regex::bytes::Regex;
+
+fn main() {
+	let path = args().nth(1).expect("no file given");
+	let mut data = Vec::new();
+	File::open(path)
+		.expect("Cannot open file")
+		.read_to_end(&mut data)
+		.unwrap();
+
+	let re_obj_begin = Regex::new(r"\d+ \d+ obj\n").unwrap();
+	let re_line = Regex::new(r"[^\n]*\n").unwrap();
+	let re_len = regex::Regex::new(r"/Length (\d+)").unwrap();
+
+	let mut data = &data[..];
+	let mut filecount: usize = 0;
+	loop {
+		let m = match re_obj_begin.find(&data) {
+			Some(m) => m,
+			None => break,
+		};
+		data = &data[m.end()..];
+		let m = re_line.find(&data).unwrap();
+		let line = String::from_utf8(m.as_bytes().to_owned()).unwrap();
+		data = &data[m.end()..];
+		if !line.contains("/Image") {
+			continue;
+		}
+		if !line.contains("/Type /XObject") {
+			continue;
+		}
+		let length = re_len
+			.captures(&line)
+			.unwrap()
+			.get(1)
+			.unwrap()
+			.as_str()
+			.parse()
+			.unwrap();
+		data = &data[7..];
+		let stream = &data[..length];
+		data = &data[length..];
+		File::create(
+			["out".to_string(), filecount.to_string()]
+				.iter()
+				.collect::<PathBuf>(),
+		)
+		.unwrap()
+		.write_all(stream)
+		.unwrap();
+		filecount += 1;
+	}
+}