update release date to actual daterelease-qpdf-2.0

git-svn-id: svn+q:///qpdf/trunk@599 71b93d88-0707-0410-a8cf-f5a4172ac649

1 files changed, 131 insertions, 0 deletions

diff --git a/libqpdf/Pl_ASCII85Decoder.cc b/libqpdf/Pl_ASCII85Decoder.cc
new file mode 100644
index 00000000..4ecdaf41
--- /dev/null
+++ b/libqpdf/Pl_ASCII85Decoder.cc
@@ -0,0 +1,131 @@
+#include <qpdf/Pl_ASCII85Decoder.hh>
+#include <qpdf/QEXC.hh>
+#include <qpdf/QTC.hh>
+#include <string.h>
+
+Pl_ASCII85Decoder::Pl_ASCII85Decoder(char const* identifier, Pipeline* next) :
+    Pipeline(identifier, next),
+    pos(0),
+    eod(0)
+{
+    memset(this->inbuf, 117, 5);
+}
+
+Pl_ASCII85Decoder::~Pl_ASCII85Decoder()
+{
+}
+
+void
+Pl_ASCII85Decoder::write(unsigned char* buf, int len)
+{
+    if (eod > 1)
+    {
+	return;
+    }
+    for (int i = 0; i < len; ++i)
+    {
+	if (eod > 1)
+	{
+	    break;
+	}
+	else if (eod == 1)
+	{
+	    if (buf[i] == '>')
+	    {
+		flush();
+		eod = 2;
+	    }
+	    else
+	    {
+		throw QEXC::General(
+		    "broken end-of-data sequence in base 85 data");
+	    }
+	}
+	else
+	{
+	    switch (buf[i])
+	    {
+	      case ' ':
+	      case '\f':
+	      case '\v':
+	      case '\t':
+	      case '\r':
+	      case '\n':
+		QTC::TC("libtests", "Pl_ASCII85Decoder ignore space");
+		// ignore whitespace
+		break;
+
+	      case '~':
+		eod = 1;
+		break;
+
+	      case 'z':
+		if (pos != 0)
+		{
+		    throw QEXC::General(
+			"unexpected z during base 85 decode");
+		}
+		else
+		{
+		    QTC::TC("libtests", "Pl_ASCII85Decoder read z");
+		    getNext()->write((unsigned char*)"\000\000\000\000", 4);
+		}
+		break;
+
+	      default:
+		if ((buf[i] < 33) || (buf[i] > 117))
+		{
+		    throw QEXC::General
+			("character out of range during base 85 decode");
+		}
+		else
+		{
+		    this->inbuf[this->pos++] = buf[i];
+		    if (pos == 5)
+		    {
+			flush();
+		    }
+		}
+		break;
+	    }
+	}
+    }
+}
+
+void
+Pl_ASCII85Decoder::flush()
+{
+    if (this->pos == 0)
+    {
+	QTC::TC("libtests", "Pl_ASCII85Decoder no-op flush");
+	return;
+    }
+    unsigned long lval = 0;
+    for (int i = 0; i < 5; ++i)
+    {
+	lval *= 85;
+	lval += (this->inbuf[i] - 33);
+    }
+
+    unsigned char outbuf[4];
+    memset(outbuf, 0, 4);
+    for (int i = 3; i >= 0; --i)
+    {
+	outbuf[i] = lval & 0xff;
+	lval >>= 8;
+    }
+
+    QTC::TC("libtests", "Pl_ASCII85Decoder partial flush",
+	    (this->pos == 5) ? 0 : 1);
+    getNext()->write(outbuf, this->pos - 1);
+
+    this->pos = 0;
+    memset(this->inbuf, 117, 5);
+}
+
+void
+Pl_ASCII85Decoder::finish()
+{
+    flush();
+    getNext()->finish();
+}