From 5df79c53745fde5d6c3340a2979b1429cd5892c1 Mon Sep 17 00:00:00 2001
From: Henrik Rydberg <rydberg@euromail.se>
Date: Sat, 8 Oct 2011 20:30:28 +0200
Subject: Initial import of htcd system 1.0

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
 src/mime/qp.cc | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 src/mime/qp.cc

(limited to 'src/mime/qp.cc')

diff --git a/src/mime/qp.cc b/src/mime/qp.cc
new file mode 100644
index 0000000..78dc36f
--- /dev/null
+++ b/src/mime/qp.cc
@@ -0,0 +1,150 @@
+/*************************************************************************
+ *
+ * HTCd - Copyright (C) 1998-2006 Henrik Rydberg
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <mime/enc.h>
+#include <mime/pack.h>
+#include <algorithm>
+
+const charset special("=\"#$\\^`{|}~");
+//const charset special("=!\"#$@[\\]^`{|}~");
+const charset headspecial("_?");
+const charset printable=cset_printable&~special;
+const charset printhead=printable&~headspecial;
+const mstring beg_tag("=?"),end_tag("?=");
+const mstring enc_qp_tag("Q"),enc_64_tag("B");
+const int WRAPAT=76;
+const int HEADWRAP=WRAPAT-7;
+
+void decodeQP(mstream& out,const sref& in)
+{
+  const char* p=in.begin();
+  while(p<in.end()) {
+    unsigned char c=*p++;
+    if(c=='=') {
+      if(cset_ws.test(*p)) p=in(p).past_nl().data();
+      else {
+        unsigned char c1=*p++,c2=*p++;
+        out.put(hexasc(c1,c2));
+      }
+    }
+    else out.put(c);
+  }
+}
+
+void encodeQP(mstream& out,const sref& in)
+{
+  sref first,rest=in;
+  while(Splitln(first,rest)) {
+    int n=0;
+    const char* p=first.begin();
+    while(p<first.end()) {
+      unsigned char c=*p++;
+      if(printable.test(c)) {
+        if(first(p).empty()&&cset_spaces.test(c)) { cashex(out.put('='),c); n+=3; }
+        else { out.put(c); n++; }
+      }
+      else { cashex(out.put('='),c); n+=3; }
+      if(first(p).nempty()&&n>=WRAPAT) { out.put('=')<<CRLF; n=0; }
+    }
+    out<<CRLF;
+  }
+}
+
+static void decodeHQ(mstream& out,const sref& in)
+{
+  const char* p=in.begin();
+  while(p<in.end()) {
+    unsigned char c=*p++;
+    if(c=='=') {
+      unsigned char c1=*p++,c2=*p++;
+      out.put(hexasc(c1,c2));
+    }
+    else if(c=='_') out.put(' ');
+    else out.put(c);
+  }
+}
+
+static int encodeHQ(mstream& out,const sref& in)
+{
+  int enc=0;
+  const char* p=in.begin();
+  while(p<in.end()) {
+    unsigned char c=*p++;
+    if(!printable.test(c)) enc=1;
+    if(printhead.test(c)) { if(c==32) out.put('_'); else out.put(c); }
+    else cashex(out.put('='),c);
+  }
+  return enc;
+}
+
+void decodeHeader(mstream& out,mstring& mime,const sref& in)
+{
+  sref e,p=in;
+  while(p.nempty()) {
+    p=p.adv(e=p.left_first(beg_tag));
+    out<<e;
+    if(p.nempty()) {
+      p=p.adv(beg_tag.size());
+      mime=p.left_first('?');
+      p=p.adv(mime.size());
+      if(p.empty()) { out<<beg_tag<<mime; p.clear(); }
+      else {
+        p=p.popf();
+        sref enc=p.left_first('?');
+        p=p.adv(enc);
+        if(p.empty()) { out<<beg_tag<<mime<<"?"<<enc; p.clear(); }
+        else {
+          p=p.adv(e=p.popf().left_first(end_tag));
+          if(p.empty()) { out<<beg_tag<<mime<<"?"<<enc<<"?"<<e; p.clear(); }
+          else {
+            p=p.adv(end_tag.size());
+            if(eqn(enc,enc_qp_tag)) decodeHQ(out,e);
+            else if(eqn(enc,enc_64_tag)) decode64(out,e);
+            else out<<"BAD: ["<<mime<<"]["<<enc<<"]["<<e<<"]";
+          }
+        }
+      }
+    }
+  }
+}
+
+void encodeHeader(mstream& out,const sref& mime,const sref& in)
+{
+  mstring tmp;
+  swrite sw(tmp);
+  if(encodeHQ(sw,in)) {
+    int wrapat=HEADWRAP-mime.size();
+    sref e,p=tmp;
+    p=p.adv(e=p.left(std::min(wrapat,p.size())));
+    out<<beg_tag<<mime<<"?Q?"<<e<<end_tag;
+    while(p.nempty()) {
+      p=p.adv(e=p.left(std::min(wrapat,p.size())));
+      out<<"\r\n\t"<<beg_tag<<mime<<"?Q?"<<e<<end_tag;
+    }
+  }
+  else {
+    sref e,p=in;
+    p=p.adv(e=p.left(std::min(WRAPAT,p.size())));
+    out<<e;
+    while(p.nempty()) {
+      p=p.adv(e=p.left(std::min(WRAPAT,p.size())));
+      out<<"\r\n\t"<<e;
+    }
+  }
+}
-- 
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