From 3fed54755168046c70762db55543cc8efe2100ff Mon Sep 17 00:00:00 2001
From: Justin Boswell <boswej@amazon.com>
Date: Fri, 29 Jan 2021 13:44:55 -0800
Subject: [PATCH] Imported CRT FFI lib (#7)

* Added php7 library skeleton

* Re-worked Makefile.frag to use paths correctly

* Added gitignore for lib

* clang-format

* Remove symlinked api.h

* Copy api.h into lib/ as part of build
---
 Makefile.frag   | 40 +++++++++++++++++++++++++++++-----------
 lib/.gitignore  |  3 +++
 lib/crt.php     | 35 +++++++++++++++++++++++++++++++++++
 lib/php.ini     |  2 ++
 lib/preload.php |  7 +++++++
 lib/test.php    |  7 +++++++
 6 files changed, 83 insertions(+), 11 deletions(-)
 create mode 100644 lib/.gitignore
 create mode 100644 lib/crt.php
 create mode 100644 lib/php.ini
 create mode 100644 lib/preload.php
 create mode 100644 lib/test.php

diff --git a/Makefile.frag b/Makefile.frag
index 7668383..a1629e8 100644
--- a/Makefile.frag
+++ b/Makefile.frag
@@ -1,34 +1,52 @@
 
-INSTALL_DIR=$(shell pwd)/build/install
+BUILD_DIR=$(shell pwd)/build
+DEPS_DIR=$(BUILD_DIR)/deps
+INT_DIR=$(BUILD_DIR)/install
+INSTALL_DIR=$(shell pwd)
+
+CMAKE = cmake3
+ifeq (, $(shell which cmake3))
+	CMAKE = cmake
+endif
 
 # download and build libcrypto.a for the CRT with -fPIC
-build/deps/openssl:
+$(DEPS_DIR)/openssl:
 	@echo Fetching libcrypto source
-	git clone --depth=1 --single-branch --branch OpenSSL_1_1_1-stable https://github.com/openssl/openssl.git build/deps/openssl
+	git clone --depth=1 --single-branch --branch OpenSSL_1_1_1-stable https://github.com/openssl/openssl.git $(DEPS_DIR)/openssl
 
-$(INSTALL_DIR)/lib/libcrypto.a: build/deps/openssl
+$(INT_DIR)/lib/libcrypto.a: $(DEPS_DIR)/openssl
 	@echo Building libcrypto
-	cd build/deps/openssl && \
+	cd $(DEPS_DIR)/openssl && \
 		./config -fPIC no-md2 no-rc5 no-rfc3779 no-sctp no-ssl-trace no-zlib no-hw no-mdc2 no-seed no-idea \
 			no-camellia no-bf no-dsa no-ssl3 no-capieng \
 			-DSSL_FORBID_ENULL -DOPENSSL_NO_DTLS1 -DOPENSSL_NO_HEARTBEATS \
-			--prefix=$(INSTALL_DIR) --openssldir=$(INSTALL_DIR) && \
+			--prefix=$(INT_DIR) --openssldir=$(INT_DIR) && \
 		make -j && \
 		make install_sw
+	mkdir -p $(INT_DIR)/lib
+	ln -s $(INT_DIR)/lib64/libcrypto.a $(INT_DIR)/lib/libcrypto.a || true
 
 
-CMAKE_CONFIGURE = cmake -DCMAKE_INSTALL_PREFIX=$(INSTALL_DIR) -DCMAKE_PREFIX_PATH=$(INSTALL_DIR) -DBUILD_TESTING=OFF
-CMAKE_BUILD = cmake --build
+CMAKE_CONFIGURE = $(CMAKE) -DCMAKE_INSTALL_PREFIX=$(INT_DIR) -DCMAKE_PREFIX_PATH=$(INT_DIR) -DBUILD_TESTING=OFF
+CMAKE_BUILD = $(CMAKE) --build
 CMAKE_BUILD_TYPE ?= RelWithDebInfo
-CMAKE_TARGET = --config $CMAKE_BUILD_TYPE --target install
+CMAKE_TARGET = --config $(CMAKE_BUILD_TYPE) --target install
 
 # cmake configure depends on libcrypto above
-build/aws-crt-ffi/CMakeCache.txt: $(INSTALL_DIR)/lib/libcrypto.a
+$(BUILD_DIR)/aws-crt-ffi/CMakeCache.txt: $(INT_DIR)/lib/libcrypto.a
 	$(CMAKE_CONFIGURE) -Hcrt/aws-crt-ffi -Bbuild/aws-crt-ffi
 
 # build the FFI library
-$(INSTALL_DIR)/lib/libaws-crt-ffi.so: build/aws-crt-ffi/CMakeCache.txt
+$(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so: $(BUILD_DIR)/aws-crt-ffi/CMakeCache.txt
 	$(CMAKE_BUILD) build/aws-crt-ffi $(CMAKE_TARGET)
 
+# copy the lib into the lib folder
+$(INSTALL_DIR)/lib/libaws-crt-ffi.so: $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/lib/api.h
+	cp -v $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/lib/libaws-crt-ffi.so
+
+# install api.h from FFI lib
+$(INSTALL_DIR)/lib/api.h: crt/aws-crt-ffi/src/api.h
+	cat crt/aws-crt-ffi/src/api.h | grep -v AWS_EXTERN_C | sed -e 's/AWS_CRT_API //' | grep -ve '^#' > $(INSTALL_DIR)/lib/api.h
+
 # Force the crt object target to depend on the FFI library
 src/crt.lo: $(INSTALL_DIR)/lib/libaws-crt-ffi.so
diff --git a/lib/.gitignore b/lib/.gitignore
new file mode 100644
index 0000000..0445360
--- /dev/null
+++ b/lib/.gitignore
@@ -0,0 +1,3 @@
+api.h
+pkgconfig/
+*.so*
diff --git a/lib/crt.php b/lib/crt.php
new file mode 100644
index 0000000..fc09f58
--- /dev/null
+++ b/lib/crt.php
@@ -0,0 +1,35 @@
+<?php
+require_once('preload.php');
+
+final class CRT {
+    private static $ffi = null;
+    function __construct() {
+        if (is_null(self::$ffi)) {
+            try {
+                self::$ffi = FFI::cdef(file_get_contents(__DIR__ . "/api.h"), __DIR__ . "/libaws-crt-ffi.so");
+            } catch (Exception $e) {
+                echo 'Exception: ', $e->getMessage(), "\n";
+            }
+        }
+    }
+
+    function init() {
+        return self::$ffi->aws_crt_init();
+    }
+
+    function clean_up() {
+        return self::$ffi->aws_crt_clean_up();
+    }
+
+    function last_error() {
+        return self::$ffi->aws_crt_last_error();
+    }
+
+    function error_str($error) {
+        return self::$ffi->aws_crt_error_str((int) $error);
+    }
+
+    function error_name($error) {
+        return self::$ffi->aws_crt_error_name((int) $error);
+    }
+}
diff --git a/lib/php.ini b/lib/php.ini
new file mode 100644
index 0000000..5386e02
--- /dev/null
+++ b/lib/php.ini
@@ -0,0 +1,2 @@
+ffi.enable=preload
+opcache.preload=preload.php
diff --git a/lib/preload.php b/lib/preload.php
new file mode 100644
index 0000000..379a2dd
--- /dev/null
+++ b/lib/preload.php
@@ -0,0 +1,7 @@
+<?php
+// php.ini
+// ffi.enable=preload
+// opcache.preload=preload.php
+if (function_exists("opcache_compile_file")) {
+    opcache_compile_file(__DIR__ . "/crt.php");
+}
diff --git a/lib/test.php b/lib/test.php
new file mode 100644
index 0000000..0fdeea2
--- /dev/null
+++ b/lib/test.php
@@ -0,0 +1,7 @@
+<?php
+require_once('crt.php');
+
+$crt = new CRT();
+$crt->init();
+var_dump($crt->error_name(0));
+$crt->clean_up();