pdf-mod-info.cc
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// Author: Vitaliy Pavlyuk
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFObjectHandle.hh>
#include <qpdf/QPDFWriter.hh>
#include <qpdf/QTC.hh>
#include <qpdf/QUtil.hh>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static char const* version = "1.1";
static char const* whoami = 0;
void
usage()
{
std::cerr << "Usage: " << whoami
<< " --in in_file [--out out_file] [--key key [--val val]?]+\n"
<< "Modifies/Adds/Removes PDF /Info entries in the in_file\n"
<< "and stores the result in out_file\n"
<< "Special mode: " << whoami << " --dump file\n"
<< "dumps all /Info entries to stdout\n";
exit(2);
}
void
dumpInfoDict(
QPDF& pdf, std::ostream& os = std::cout, std::string const& sep = ":\t")
{
QPDFObjectHandle trailer = pdf.getTrailer();
if (trailer.hasKey("/Info")) {
for (auto& it : trailer.getKey("/Info").ditems()) {
std::string val;
if (it.second.isString()) {
val = it.second.getStringValue();
} else if (it.second.isName()) {
val = it.second.getName();
} else // according to PDF Spec 1.5, shouldn't happen
{
val = it.second.unparseResolved();
}
os << it.first.substr(1) << sep << val << std::endl; // skip '/'
}
}
}
void
pdfDumpInfoDict(char const* fname)
{
try {
QPDF pdf;
pdf.processFile(fname);
dumpInfoDict(pdf);
} catch (std::exception& e) {
std::cerr << e.what() << std::endl;
exit(2);
}
}
int
main(int argc, char* argv[])
{
bool static_id = false;
std::map<std::string, std::string> Keys;
whoami = QUtil::getWhoami(argv[0]);
if ((argc == 2) && (!strcmp(argv[1], "--version"))) {
std::cout << whoami << " version " << version << std::endl;
exit(0);
}
if ((argc == 3) && (!strcmp(argv[1], "--dump"))) {
QTC::TC("examples", "pdf-mod-info --dump");
pdfDumpInfoDict(argv[2]);
exit(0);
}
char* fl_in = 0;
char* fl_out = 0;
std::string cur_key;
for (int i = 1; i < argc; ++i) {
if ((!strcmp(argv[i], "--in")) && (++i < argc)) {
fl_in = argv[i];
} else if ((!strcmp(argv[i], "--out")) && (++i < argc)) {
fl_out = argv[i];
} else if (!strcmp(argv[i], "--static-id")) // don't document
{
static_id = true; // this should be used in test suites only
} else if ((!strcmp(argv[i], "--key")) && (++i < argc)) {
QTC::TC("examples", "pdf-mod-info -key");
cur_key = argv[i];
if (!((cur_key.length() > 0) && (cur_key.at(0) == '/'))) {
cur_key = "/" + cur_key;
}
Keys[cur_key] = "";
} else if ((!strcmp(argv[i], "--val")) && (++i < argc)) {
if (cur_key.empty()) {
QTC::TC("examples", "pdf-mod-info usage wrong val");
usage();
}
QTC::TC("examples", "pdf-mod-info -val");
Keys[cur_key] = argv[i];
cur_key.clear();
} else {
QTC::TC("examples", "pdf-mod-info usage junk");
usage();
}
}
if (!fl_in) {
QTC::TC("examples", "pdf-mod-info no in file");
usage();
}
if (!fl_out) {
QTC::TC("examples", "pdf-mod-info in-place");
fl_out = fl_in;
}
if (Keys.size() == 0) {
QTC::TC("examples", "pdf-mod-info no keys");
usage();
}
std::string fl_tmp = fl_out;
fl_tmp += ".tmp";
try {
QPDF file;
file.processFile(fl_in);
QPDFObjectHandle filetrailer = file.getTrailer();
QPDFObjectHandle fileinfo;
for (std::map<std::string, std::string>::const_iterator it =
Keys.begin();
Keys.end() != it;
++it) {
if (!fileinfo.isInitialized()) {
if (filetrailer.hasKey("/Info")) {
QTC::TC("examples", "pdf-mod-info has info");
fileinfo = filetrailer.getKey("/Info");
} else {
QTC::TC("examples", "pdf-mod-info file no info");
fileinfo = QPDFObjectHandle::newDictionary();
filetrailer.replaceKey("/Info", fileinfo);
}
}
if (it->second == "") {
fileinfo.removeKey(it->first);
} else {
QPDFObjectHandle elt = fileinfo.newString(it->second);
elt.makeDirect();
fileinfo.replaceKey(it->first, elt);
}
}
QPDFWriter w(file, fl_tmp.c_str());
w.setStreamDataMode(qpdf_s_preserve);
w.setLinearization(true);
w.setStaticID(static_id); // for testing only
w.write();
} catch (std::exception& e) {
std::cerr << e.what() << std::endl;
exit(2);
}
try {
(void)remove(fl_out);
QUtil::os_wrapper(
"rename " + fl_tmp + " " + std::string(fl_out),
rename(fl_tmp.c_str(), fl_out));
} catch (std::exception& e) {
std::cerr << e.what() << std::endl;
exit(2);
}
return 0;
}