From 8b0348b3d5f33494d7e637411633fbea511a78d7 Mon Sep 17 00:00:00 2001
From: Jakub Wilk <jwilk@jwilk.net>
Date: Mon, 1 Apr 2019 08:49:02 +0200
Subject: [PATCH] Use Catalog::findPage(Ref) as alternative to
 Catalog::findPage(int, int).
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Fixes:

    pdf2djvu.cc: In function ‘int get_page_for_goto_link(pdf::link::GoTo*, pdf::Catalog*)’:
    pdf2djvu.cc:90:56: error: no matching function for call to ‘Catalog::findPage(int&, int&)’
---
 pdf-backend.cc | 15 +++++++++++++++
 pdf-backend.hh |  2 ++
 pdf2djvu.cc    |  2 +-
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/pdf-backend.cc b/pdf-backend.cc
index f1d7662..a1b9b63 100644
--- a/pdf-backend.cc
+++ b/pdf-backend.cc
@@ -631,4 +631,19 @@ const char * pdf::get_c_string(const pdf::String *str)
 }
 #endif
 
+template <typename C> static auto find_page_impl(C *catalog, pdf::Ref pgref) -> decltype(catalog->findPage(0, 0))
+{
+  return catalog->findPage(pgref.num, pgref.gen);
+}
+
+template <typename C> static auto find_page_impl(C *catalog, pdf::Ref pgref) -> decltype(catalog->findPage(pgref))
+{
+  return catalog->findPage(pgref);
+}
+
+int pdf::find_page(pdf::Catalog *catalog, pdf::Ref pgref)
+{
+  return find_page_impl<pdf::Catalog>(catalog, pgref);
+}
+
 // vim:ts=2 sts=2 sw=2 et
diff --git a/pdf-backend.hh b/pdf-backend.hh
index d7872c3..d88c956 100644
--- a/pdf-backend.hh
+++ b/pdf-backend.hh
@@ -436,6 +436,8 @@ namespace pdf
 
   const char * get_c_string(const pdf::String *str);
 
+  int find_page(pdf::Catalog *catalog, pdf::Ref pgref);
+
 }
 
 #endif
diff --git a/pdf2djvu.cc b/pdf2djvu.cc
index d9e1532..21f2d50 100644
--- a/pdf2djvu.cc
+++ b/pdf2djvu.cc
@@ -87,7 +87,7 @@ static int get_page_for_goto_link(pdf::link::GoTo *goto_link, pdf::Catalog *cata
     if (dest->isPageRef())
     {
       pdf::Ref pageref = dest->getPageRef();
-      page = catalog->findPage(pageref.num, pageref.gen);
+      page = pdf::find_page(catalog, pageref);
     }
     else
       page = dest->getPageNum();