Add range_check method to QIntC

1 files changed, 2 insertions, 17 deletions

diff --git a/libqpdf/BufferInputSource.cc b/libqpdf/BufferInputSource.cc
index fb4010ef..9e9b4c17 100644
--- a/libqpdf/BufferInputSource.cc
+++ b/libqpdf/BufferInputSource.cc
@@ -102,21 +102,6 @@ BufferInputSource::tell()
 }
 
 void
-BufferInputSource::range_check(qpdf_offset_t cur, qpdf_offset_t delta)
-{
-    if ((delta > 0) &&
-        ((std::numeric_limits<qpdf_offset_t>::max() - cur) < delta))
-    {
-        std::ostringstream msg;
-        msg.imbue(std::locale::classic());
-        msg << "seeking forward from " << cur
-            << " by " << delta
-            << " would cause an overflow of the offset type";
-        throw std::range_error(msg.str());
-    }
-}
-
-void
 BufferInputSource::seek(qpdf_offset_t offset, int whence)
 {
     switch (whence)
@@ -126,12 +111,12 @@ BufferInputSource::seek(qpdf_offset_t offset, int whence)
 	break;
 
       case SEEK_END:
-        range_check(this->m->max_offset, offset);
+        QIntC::range_check(this->m->max_offset, offset);
 	this->m->cur_offset = this->m->max_offset + offset;
 	break;
 
       case SEEK_CUR:
-        range_check(this->m->cur_offset, offset);
+        QIntC::range_check(this->m->cur_offset, offset);
 	this->m->cur_offset += offset;
 	break;