Add QPDFJob::ConfigError exception

include/qpdf/QPDFJob.hh

@@ -36,12 +36,22 @@
 #include <iostream>
 #include <functional>
 #include <memory>
+#include <stdexcept>
 
 class QPDFWriter;
 
 class QPDFJob
 {
   public:
+    // ConfigError exception is thrown if there are any usage-like
+    // errors when calling Config methods.
+    class QPDF_DLL_CLASS ConfigError: public std::runtime_error
+    {
+      public:
+        QPDF_DLL
+        ConfigError(std::string const&);
+    };
+
     QPDF_DLL
     QPDFJob();
 

libqpdf/QPDFJob.cc

@@ -33,6 +33,11 @@
 #include <qpdf/QPDFWriter.hh>
 #include <qpdf/QIntC.hh>
 
+QPDFJob::ConfigError::ConfigError(std::string const& msg) :
+    std::runtime_error(msg)
+{
+}
+
 namespace
 {
     class ImageOptimizer: public QPDFObjectHandle::StreamDataProvider

libqpdf/QPDFJob_config.cc

@@ -534,9 +534,7 @@ QPDFJob::CopyAttConfig::end()
 {
     if (this->caf.path.empty())
     {
-        // QXXXQ usage, json, and config exceptions need to be unified
-        // in some fashion.
-        throw std::runtime_error("copy attachments: no path specified");
+        throw QPDFJob::ConfigError("copy attachments: no path specified");
     }
     this->config.o.attachments_to_copy.push_back(this->caf);
     return this->config;
@@ -579,8 +577,7 @@ QPDFJob::AttConfig::creationdate(char const* parameter)
 {
     if (! QUtil::pdf_time_to_qpdf_time(parameter))
     {
-        // QXXXQ
-        throw std::runtime_error(
+        throw QPDFJob::ConfigError(
             std::string(parameter) + " is not a valid PDF timestamp");
     }
     this->att.creationdate = parameter;
@@ -592,8 +589,7 @@ QPDFJob::AttConfig::moddate(char const* parameter)
 {
     if (! QUtil::pdf_time_to_qpdf_time(parameter))
     {
-        // QXXXQ
-        throw std::runtime_error(
+        throw QPDFJob::ConfigError(
             std::string(parameter) + " is not a valid PDF timestamp");
     }
     this->att.moddate = parameter;
@@ -605,8 +601,7 @@ QPDFJob::AttConfig::mimetype(char const* parameter)
 {
     if (strchr(parameter, '/') == nullptr)
     {
-        // QXXXQ
-        throw std::runtime_error(
+        throw QPDFJob::ConfigError(
             "mime type should be specified as type/subtype");
     }
     this->att.mimetype = parameter;
@@ -630,18 +625,17 @@ QPDFJob::AttConfig::replace()
 QPDFJob::Config&
 QPDFJob::AttConfig::end()
 {
-    // QXXXQ runtime_error
-
     static std::string now = QUtil::qpdf_time_to_pdf_time(
         QUtil::get_current_qpdf_time());
     if (this->att.path.empty())
     {
-        throw std::runtime_error("add attachment: no path specified");
+        throw QPDFJob::ConfigError("add attachment: no path specified");
     }
     std::string last_element = QUtil::path_basename(this->att.path);
     if (last_element.empty())
     {
-        throw std::runtime_error("path for --add-attachment may not be empty");
+        throw QPDFJob::ConfigError(
+            "path for --add-attachment may not be empty");
     }
     if (this->att.filename.empty())
     {

qpdf/qpdf.cc

@@ -52,6 +52,10 @@ int realmain(int argc, char* argv[])
     {
         usageExit(e.what());
     }
+    catch (QPDFJob::ConfigError& e)
+    {
+        usageExit(e.what());
+    }
     catch (std::exception& e)
     {
 	std::cerr << whoami << ": " << e.what() << std::endl;