add ftp library

This is a good one. It doesn't need an external library and found a ton of corner cases I screwed up. It also got my stream handling much more solid.

I had to wrap other streams as they came into the extension and then unwrap them on the way out

Reviewed By: @sgolemon

Differential Revision: D945250

hphp/NEWS

@@ -2,13 +2,15 @@ future
   - Optimize closure invocation and __invoke (~3x faster to invoke)
   - Import gettext extension
   - string and object allocation optimizations (reduced memory usage for both)
-  - Import YAML Extension
+  - Import YAML extension
+  - Import ftp extension
 
 "Kimchi" 2-Sep-2013
   - Fix order of custom attributes and visibility in  ctor arg promotion
   - Implement CachingIterator
   - Implement RecursiveCachingIterator
   - Generalized heuristic for choosing when to inline in the jit
+  - Introduced a Zend compatibility layer to compile extensions
   - Imported calendar extension
   - Use gcc-4.8.1 by default
   - Improve hhvm commandline parsing logic

hphp/runtime/ext_hhvm/CMakeLists.txt

@@ -58,6 +58,7 @@ endforeach()
 
 auto_sources(HPHP_IDLS "*.idl.json" "RECURSE" "${HPHP_HOME}/hphp/system/idl")
 list(REMOVE_ITEM HPHP_IDLS "${HPHP_HOME}/hphp/system/idl/calendar.idl.json")
+list(REMOVE_ITEM HPHP_IDLS "${HPHP_HOME}/hphp/system/idl/ftp.idl.json")
 list(REMOVE_ITEM HPHP_IDLS "${HPHP_HOME}/hphp/system/idl/gettext.idl.json")
 list(REMOVE_ITEM HPHP_IDLS "${HPHP_HOME}/hphp/system/idl/yaml.idl.json")
 

hphp/runtime/ext_zend_compat/README.md

@@ -0,0 +1,24 @@
+# Zend Extension Source Compatability Layer
+
+If you want to compile your existing zend extension against HHVM, you can use 
+these headers. The runtimes are similar enough that we can just map the macros 
+to our data structures and it mostly works. 
+
+## Migration Steps
+
+  cp -R <zend_extension_dir> runtime/ext_zend_compat/<ext_name>
+
+  # move all the .c to .cpp
+  for i in runtime/ext_zend_compat/<ext_name>/*.c; do mv $i "$i"pp; done 
+
+  # If your extension has docs on php.net you can make the idl like this:
+  cd system/idl
+  php newexp.php <ext_name>
+  # Otherwise you have to make the .idl by hand
+
+  <setup the build environment>
+
+## Things you have to fix in your code
+
+* C++ compile errors
+* Use `Z_RESVAL` instead of `Z_LVAL` for resource access