add page numbering program

1 files changed, 171 insertions, 0 deletions

diff --git a/vorlesungsnotizen/bin/numberpages.cpp b/vorlesungsnotizen/bin/numberpages.cpp
new file mode 100644
index 0000000..b990453
--- /dev/null
+++ b/vorlesungsnotizen/bin/numberpages.cpp
@@ -0,0 +1,171 @@
+/*
+ * numberpages.cpp -- driver program to number pages in a PDF, this was
+ *                    mainly necessary because the shell breaks blanks
+ *                    in the section option string
+ *
+ * (c) 2022 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+ */
+#include <cstdio>
+#include <cstdlib>
+#include <getopt.h>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <sys/stat.h>
+
+void	usage(char *progname) {
+	std::cout << "usage: " << progname << " [ -f ] [ -s section ] <unnumbered.pdf> <numbered.pdf>" << std::endl;
+}
+
+struct option	longoptions[] = {
+{ "debug",	no_argument,		NULL,	'd' },
+{ "section",	required_argument,	NULL,	's' },
+{ "force",	no_argument,		NULL,	'f' },
+{ NULL,		no_argument,		NULL,	 0  }
+};
+
+int	main(int argc, char *argv[]) {
+	bool	force = false;
+	bool	debug = false;
+	std::string	section;
+	int	c, longindex, rc;
+	while (EOF != (c = getopt_long(argc, argv, "dfhs:?", longoptions, &longindex))) {
+		switch (c) {
+		case 'd':
+			debug = true;
+			break;
+		case 'f':
+			force = true;
+			break;
+		case 'h':
+		case '?':
+			usage(argv[0]);
+			return EXIT_SUCCESS;
+		case 's':
+			section = std::string(optarg);
+			if (debug) {
+				std::cout << "section string: " << section;
+				std::cout << std::endl;
+			}
+			break;
+		}
+	}
+
+	// remaining arguments are file names
+	if ((argc - optind) < 2) {
+		std::cerr << "not enough arguments" << std::endl;
+		usage(argv[0]);
+		return EXIT_FAILURE;
+	}
+	std::string	unnumbered = std::string(argv[optind++]);
+	std::string	numbered = std::string(argv[optind++]);
+	if (debug) {
+		std::cout << "numbering " << unnumbered;
+		std::cout << ", sending output to " << unnumbered;
+		std::cout << std::endl;
+	}
+
+	// make sure input file does exist
+	struct stat	sb;
+	rc = stat(unnumbered.c_str(), &sb);
+	if ((0 == rc) && S_ISREG(sb.st_mode)) {
+		if (debug) {
+			std::cout << "input file " << unnumbered << " found";
+			std::cout << std::endl;
+		}
+	} else {
+		std::cerr << "cannot find " << unnumbered << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// make sure the "unnumbered.pdf" file does not exist
+	rc = stat("unnumbered.pdf", &sb);
+	if (0 == rc) {
+		std::cerr << "file unnumbered.pdf exists, clean up first";
+		std::cerr << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// test for existence of output file
+	rc = stat(numbered.c_str(), &sb);
+	if ((!force) && (0 == rc)) {
+		std::cerr << "output file exists, use --force option";
+		std::cerr << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// make sure the numbered.tex is present
+	rc = stat("numbered.tex", &sb);
+	if ((0 != rc) || (!S_ISREG(sb.st_mode))) {
+		std::cerr << "file 'numbered.tex' is missing" << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// remove the "numbered.pdf" if it exists
+	if (debug) {
+		std::cout << "removing numbered.pdf" << std::endl;
+	}
+	unlink("numbered.pdf");
+
+	// copy the file
+	{
+		std::ostringstream	out;
+		out << "cp '" << unnumbered << "' unnumbered.pdf";
+		out.flush();
+		std::string	copycommand = out.str();
+		rc = system(copycommand.c_str());
+		if (0 != rc) {
+			std::cerr << "could not copy " << unnumbered;
+			std::cerr << " to unnumbered.pdf: " << rc << std::endl;
+			return EXIT_FAILURE;
+		}
+		if (debug) {
+			std::cout << "file " << unnumbered << " copied to ";
+			std::cout << "unnumbered.pdf" << std::endl;
+		}
+	}
+
+	// prepare command line
+	std::ostringstream	out;
+	out << "pdflatex ";
+	if (section.size() > 0) {
+		out << "\\\\def\\\\sectionnumber{" << section << "} ";
+		out << "\\\\input{numbered.tex}";
+	} else {
+		out << unnumbered;
+	}
+	if (debug) {
+		std::cout << "command line: " << out.str() << std::endl;
+	}
+
+	// run the command
+	rc = system(out.str().c_str());
+	if (0 != rc) {
+		std::cerr << "pdflatex failed: " << rc << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// check for the existence of the output file
+	rc = stat("numbered.pdf", &sb);
+	if ((0 != rc) || (!S_ISREG(sb.st_mode))) {
+		std::cerr << "output file 'numbered.pdf' not found";
+		std::cerr << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// rename the output file
+	rc = rename("numbered.pdf", numbered.c_str());
+	if (rc != 0) {
+		std::string	error(strerror(errno));
+		std::cerr << "cannot rename file to '" << numbered << ": ";
+		std::cerr << error << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	// perform some cleanup
+	unlink("unnumbered.pdf");
+	unlink("numbered.log");
+	unlink("numbered.aux");
+
+	return EXIT_SUCCESS;
+}