Bulk of initial work.

191ca2c7 · Michael Droettboom · 528b70e8 · 191ca2c7 · 191ca2c7 · 191ca2c7
Commit 191ca2c7 authored Feb 23, 2018 by Michael Droettboom
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Makefile Makefile +50 -0

README.md README.md +24 -0

index.html index.html +41 -0

main.cpp main.cpp +554 -0

No files found.
--- a/Makefile
+++ b/Makefile
+PYVERSION=3.5.2
+PYMINOR=$(basename $(PYVERSION))
+CPYTHON_EMSCRIPTEN_ROOT=../cpython-emscripten
+
+CC=emcc
+CXX=em++
+OPTFLAGS=-O2
+CXXFLAGS=-std=c++14 $(OPTFLAGS) -g -I $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/include/python$(PYMINOR)/ -Wno-warn-absolute-paths
+LDFLAGS=$(OPTFLAGS) $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/libpython$(PYMINOR).a \
+  -s TOTAL_MEMORY=268435456 \
+  -s ASSERTIONS=2 \
+  -s EMULATE_FUNCTION_POINTER_CASTS=1 \
+  -s EXPORTED_FUNCTIONS='["_main"]' \
+  --memory-init-file 0
+
+
+all: python.asm.js
+
+
+python.asm.js: main.bc root
+	$(CC) --bind -o $@ $(filter %.bc,$^) $(LDFLAGS) \
+		$(foreach d,$(wildcard root/*),--preload-file $d@/$(notdir $d))
+
+
+serve: python.asm.js
+	@echo "Serving on port 8062"
+	python -m SimpleHTTPServer 8062
+
+
+clean:
+	-rm -fr root
+	-rm python.asm.js python.asm.data python.asm.wasm
+	-rm *.bc
+
+
+%.bc: %.cpp $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR)
+	$(CXX) -o $@ $< $(CXXFLAGS)
+
+
+root: $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR)
+	mkdir -p root/lib
+	cp -a $(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR)/ root/lib
+	( \
+		cd root/lib/python$(PYMINOR); \
+		rm -fr test distutils ensurepip idlelib __pycache__ tkinter; \
+	)
+
+
+$(CPYTHON_EMSCRIPTEN_ROOT)/installs/python-$(PYVERSION)/lib/python$(PYMINOR):
+	make -C $(CPYTHON_EMSCRIPTEN_ROOT)/$(PYVERSION)
--- a/README.md
+++ b/README.md
+# Calling Python from Javascript with value conversion
+
+# Building
+
+These instructions were tested on Linux. OSX should be substantively the same.
+
+1. Build emscripten according to [these
+   instructions](https://developer.mozilla.org/en-US/docs/WebAssembly/C_to_wasm).
+
+2. Enable the emscripten environment (`source emsdk_env.sh`)
+
+3. Build [cpython-emscripten](https://github.com/dgym/cpython-emscripten):
+
+   1. Clone the git repository
+
+   2. cd into `3.5.2`, and type `make`.
+
+4. Build this project.
+
+   [It assumes that `cpython-emscripten` was checked out and built in a
+   directory alongside this project. TODO: Provide a way to specify the
+   cpython-emscripten location]
+
+   Type `make`.
--- a/index.html
+++ b/index.html
+<!DOCTYPE html>
+<html>
+    <!-- Quick and dirty tests...  Not useful for anything else. -->
+    <head>
+        <meta charset="utf-8" />
+    </head>
+    <body>
+        <script src='python.asm.js'></script>
+        <script>
+         /*             window.pyexec = Module.cwrap('PyRun_SimpleString', 'number', ['string']);*/
+
+         var doTest = function(code) {
+             var x = Module.runPython(code);
+             console.log("------")
+             console.log(code)
+             console.log("Return type " + typeof x)
+             console.log(JSON.stringify(x))
+             console.log()
+         }
+
+
+            var onReady = function() {
+                doTest("42");
+                doTest("42.0");
+                doTest("[0, 1, 32.0]")
+                doTest("{'foo': 42}")
+                doTest("'This is a string'")
+                doTest("def foo():\n  return 42\n\nfoo()")
+                doTest("import sys\nsys.platform")
+            };
+
+            // Wait for the module to be ready before calling any functions.
+            var interval = setInterval(function () {
+                if (Module.calledRun) {
+                    window.clearInterval(interval);
+                    onReady();
+                }
+            }, 100);
+        </script>
+    </body>
+</html>
--- a/main.cpp
+++ b/main.cpp