Finish QPDFJob examples and add tests for them

examples/build.mk

@@ -17,7 +17,8 @@ BINS_examples = \
 	qpdf-job
 CBINS_examples = \
 	pdf-c-objects \
-	pdf-linearize
+	pdf-linearize \
+	qpdfjob-c
 
 TARGETS_examples = $(foreach B,$(BINS_examples) $(CBINS_examples),examples/$(OUTPUT_DIR)/$(call binname,$(B)))
 

examples/qpdf-job.cc

@@ -1,20 +1,27 @@
 #include <qpdf/QPDFJob.hh>
 #include <qpdf/QUtil.hh>
+#include <qpdf/QIntC.hh>
 
 #include <iostream>
 #include <cstring>
 
-// QXXXQ describe
+// This program is a simple demonstration of different ways to use the
+// QPDFJob API.
 
 static char const* whoami = 0;
 
-#if 0 // QXXXQ
-static void usage(std::string const& msg)
+static void usage()
 {
-    std::cerr << "Usage: " << whoami << " QXXXQ" << std::endl;
+    std::cerr
+        << "Usage: " << whoami << std::endl
+        << "This program linearizes the first page of in.pdf to out1.pdf,"
+        << " out2.pdf, and"
+        << std::endl
+        << " out3.pdf, each demonstrating a different way to use the"
+        << " QPDFJob API"
+        << std::endl;
     exit(2);
 }
-#endif
 
 int main(int argc, char* argv[])
 {
@@ -26,24 +33,90 @@ int main(int argc, char* argv[])
 	whoami += 3;
     }
 
+    if (argc != 1)
+    {
+        usage();
+    }
+
+    // The examples below all catch std::exception. Note that
+    // QPDFUsage can be caught separately to report on errors in using
+    // the API itself. For CLI, this is command-line usage. For JSON
+    // or the API, it would be errors from the equivalent invocation.
+
+    // Note that staticId is used for testing only.
+
     try
     {
+        // Use the config API
         QPDFJob j;
         j.config()
-            ->inputFile("/tmp/1.pdf")
-            ->outputFile("/tmp/2.pdf")
+            ->inputFile("in.pdf")
+            ->outputFile("out1.pdf")
             ->pages()
-            ->pageSpec(".", "1-z")
+            ->pageSpec(".", "1")
             ->endPages()
-            ->qdf()
+            ->linearize()
+            ->staticId() // for testing only
             ->checkConfiguration();
         j.run();
+        std::cout << "out1 status: " << j.getExitCode() << std::endl;
     }
     catch (std::exception& e)
     {
-        // QXXXQ catch usage, configerror, whatever we end up with separately
         std::cerr << "exception: " << e.what() << std::endl;
         return 2;
     }
+
+    try
+    {
+        char const* new_argv[] = {
+            whoami,
+            "in.pdf",
+            "out2.pdf",
+            "--linearize",
+            "--pages",
+            ".",
+            "1",
+            "--",
+            "--static-id",
+            nullptr
+        };
+        QPDFJob j;
+        j.initializeFromArgv(9, new_argv);
+        j.run();
+        std::cout << "out2 status: " << j.getExitCode() << std::endl;
+    }
+    catch (std::exception& e)
+    {
+        std::cerr << "exception: " << e.what() << std::endl;
+        return 2;
+    }
+
+    try
+    {
+        // Use the JSON API
+        QPDFJob j;
+        j.initializeFromJson(R"({
+  "inputFile": "in.pdf",
+  "outputFile": "out3.pdf",
+  "staticId": "",
+  "linearize": "",
+  "pages": [
+    {
+      "file": ".",
+      "range": "1"
+    }
+  ]
+}
+)");
+        j.run();
+        std::cout << "out3 status: " << j.getExitCode() << std::endl;
+    }
+    catch (std::exception& e)
+    {
+        std::cerr << "exception: " << e.what() << std::endl;
+        return 2;
+    }
+
     return 0;
 }

examples/qpdfjob-c.c

@@ -0,0 +1,62 @@
+/*
+ * This is an example program to linearize a PDF file using the C
+ * QPDFJob API.
+ */
+
+#include <qpdf/qpdfjob-c.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char const* whoami = 0;
+
+static void usage()
+{
+    fprintf(stderr, "Usage: %s infile outfile\n", whoami);
+    exit(2);
+}
+
+int main(int argc, char* argv[])
+{
+    char* infile = NULL;
+    char* outfile = NULL;
+    char const* new_argv[6];
+    int r = 0;
+    char* p = 0;
+
+    if ((p = strrchr(argv[0], '/')) != NULL)
+    {
+	whoami = p + 1;
+    }
+    else if ((p = strrchr(argv[0], '\\')) != NULL)
+    {
+	whoami = p + 1;
+    }
+    else
+    {
+	whoami = argv[0];
+    }
+
+    if (argc != 3)
+    {
+	usage();
+    }
+
+    infile = argv[1];
+    outfile = argv[2];
+
+    new_argv[0] = "qpdfjob";
+    new_argv[1] = infile;
+    new_argv[2] = outfile;
+    new_argv[3] = "--linearize";
+    new_argv[4] = "--static-id"; /* for testing only */
+    new_argv[5] = NULL;
+
+    /* See qpdf-job.cc for a C++ example of using the json interface.
+     * To use that from C just like the argv one, call
+     * qpdfjob_run_from_json instead and pass the json string as a
+     * single char const* argument.
+     */
+    r = qpdfjob_run_from_argv(5, new_argv);
+    return r;
+}

examples/qtest/qpdf-job.test

@@ -0,0 +1,32 @@
+#!/usr/bin/env perl
+require 5.008;
+use warnings;
+use strict;
+
+chdir("qpdf-job") or die "chdir testdir failed: $!\n";
+
+require TestDriver;
+
+cleanup();
+
+my $td = new TestDriver('qpdf-job');
+
+$td->runtest("qpdf-job",
+	     {$td->COMMAND => "qpdf-job"},
+	     {$td->FILE => "out", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
+for (my $i = 1; $i <= 3; ++$i)
+{
+    $td->runtest("check output $i",
+                 {$td->FILE => "out$i.pdf"},
+                 {$td->FILE => "out.pdf"});
+}
+
+cleanup();
+
+$td->report(4);
+
+sub cleanup
+{
+    unlink "out1.pdf", "out2.pdf", "out3.pdf";
+}

examples/qtest/qpdf-job/in.pdf

@@ -0,0 +1,78 @@
+%PDF-1.3
+1 0 obj
+<<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+endobj
+
+2 0 obj
+<<
+  /Type /Pages
+  /Kids [
+    3 0 R
+  ]
+  /Count 1
+>>
+endobj
+
+3 0 obj
+<<
+  /Type /Page
+  /Parent 2 0 R
+  /MediaBox [0 0 612 792]
+  /Contents 4 0 R
+  /Resources <<
+    /ProcSet 5 0 R
+    /Font <<
+      /F1 6 0 R
+    >>
+  >>
+>>
+endobj
+
+4 0 obj
+<<
+  /Length 44
+>>
+stream
+BT
+  /F1 24 Tf
+  72 720 Td
+  (Potato) Tj
+ET
+endstream
+endobj
+
+5 0 obj
+[
+  /PDF
+  /Text
+]
+endobj
+
+6 0 obj
+<<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Helvetica
+  /Encoding /WinAnsiEncoding
+>>
+endobj
+
+xref
+0 7
+0000000000 65535 f 
+0000000009 00000 n 
+0000000063 00000 n 
+0000000135 00000 n 
+0000000307 00000 n 
+0000000403 00000 n 
+0000000438 00000 n 
+trailer <<
+  /Size 7
+  /Root 1 0 R
+>>
+startxref
+544
+%%EOF

examples/qtest/qpdf-job/out

@@ -0,0 +1,3 @@
+out1 status: 0
+out2 status: 0
+out3 status: 0

examples/qtest/qpdfjob-c.test

@@ -0,0 +1,29 @@
+#!/usr/bin/env perl
+require 5.008;
+use warnings;
+use strict;
+
+chdir("qpdf-job") or die "chdir testdir failed: $!\n";
+
+require TestDriver;
+
+cleanup();
+
+my $td = new TestDriver('qpdfjob-c');
+
+$td->runtest("qpdfjob-c",
+	     {$td->COMMAND => "qpdfjob-c in.pdf a.pdf"},
+	     {$td->STRING => "", $td->EXIT_STATUS => 0},
+             $td->NORMALIZE_NEWLINES);
+$td->runtest("check output",
+	     {$td->FILE => "a.pdf"},
+	     {$td->FILE => "out.pdf"});
+
+cleanup();
+
+$td->report(2);
+
+sub cleanup
+{
+    unlink "a.pdf";
+}

examples/qtest/qpdfjob-c/in.pdf

@@ -0,0 +1,78 @@
+%PDF-1.3
+1 0 obj
+<<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+endobj
+
+2 0 obj
+<<
+  /Type /Pages
+  /Kids [
+    3 0 R
+  ]
+  /Count 1
+>>
+endobj
+
+3 0 obj
+<<
+  /Type /Page
+  /Parent 2 0 R
+  /MediaBox [0 0 612 792]
+  /Contents 4 0 R
+  /Resources <<
+    /ProcSet 5 0 R
+    /Font <<
+      /F1 6 0 R
+    >>
+  >>
+>>
+endobj
+
+4 0 obj
+<<
+  /Length 44
+>>
+stream
+BT
+  /F1 24 Tf
+  72 720 Td
+  (Potato) Tj
+ET
+endstream
+endobj
+
+5 0 obj
+[
+  /PDF
+  /Text
+]
+endobj
+
+6 0 obj
+<<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Helvetica
+  /Encoding /WinAnsiEncoding
+>>
+endobj
+
+xref
+0 7
+0000000000 65535 f 
+0000000009 00000 n 
+0000000063 00000 n 
+0000000135 00000 n 
+0000000307 00000 n 
+0000000403 00000 n 
+0000000438 00000 n 
+trailer <<
+  /Size 7
+  /Root 1 0 R
+>>
+startxref
+544
+%%EOF

include/qpdf/qpdfjob-c.h

@@ -39,7 +39,7 @@
 
 /*
  * This file provides a minimal wrapper around QPDFJob. See
- * examples/qpdf-job.c for an example of its use.
+ * examples/qpdfjob-c.c for an example of its use.
  */
 
 #ifdef __cplusplus