merge

Cython/Compiler/CmdLine.py

@@ -38,6 +38,7 @@ Options:
   -a, --annotate                 Produce a colorized HTML version of the source.
   --line-directives              Produce #line directives pointing to the .pyx source
   --cplus                        Output a c++ rather than c file.
+  --embed                        Embed the Python interpreter in a main() method.
   --directive <name>=<value>[,<name=value,...] Overrides a compiler directive
 """
 
@@ -89,6 +90,8 @@ def parse_command_line(args):
                 options.obj_only = 0
             elif option in ("-+", "--cplus"):
                 options.cplus = 1
+            elif option == "--embed":
+                Options.embed = True
             elif option.startswith("-I"):
                 options.include_path.append(get_param(option))
             elif option == "--include-dir":

Cython/Compiler/ModuleNode.py

@@ -56,6 +56,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         else:
             env.doc = self.doc
         env.directives = self.directives
+        if Options.embed:
+            self.__main__cname = env.intern_identifier(EncodedString("__main__"))
         self.body.analyse_declarations(env)
     
     def process_implementation(self, options, result):
@@ -275,6 +277,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         self.generate_module_init_func(modules[:-1], env, code)
         code.mark_pos(None)
         self.generate_module_cleanup_func(env, code)
+        if Options.embed:
+            self.generate_main_method(env, code)
         self.generate_filename_table(code)
         self.generate_utility_functions(env, code, h_code)
 
@@ -651,9 +655,18 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         type = entry.type
         scope = type.scope
         if scope:
+            kind = type.kind
+            packed = type.is_struct and type.packed
+            if packed:
+                kind = "%s %s" % (type.kind, "__Pyx_PACKED")
+                code.globalstate.use_utility_code(packed_struct_utility_code)
             header, footer = \
-                self.sue_header_footer(type, type.kind, type.cname)
+                self.sue_header_footer(type, kind, type.cname)
             code.putln("")
+            if packed:
+                code.putln("#if !defined(__GNUC__)")
+                code.putln("#pragma pack(push, 1)")
+                code.putln("#endif")
             code.putln(header)
             var_entries = scope.var_entries
             if not var_entries:
@@ -665,6 +678,10 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
                     "%s;" %
                         attr.type.declaration_code(attr.cname))
             code.putln(footer)
+            if packed:
+                code.putln("#if !defined(__GNUC__)")
+                code.putln("#pragma pack(pop)")
+                code.putln("#endif")
 
     def generate_enum_definition(self, entry, code):
         code.mark_pos(entry.pos)
@@ -1734,6 +1751,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         code.putln("Py_INCREF(Py_None); return Py_None;")
         code.putln('}')
 
+    def generate_main_method(self, env, code):
+        code.globalstate.use_utility_code(main_method.specialize(module_name=env.module_name))
+
     def generate_filename_init_call(self, code):
         code.putln("%s();" % Naming.fileinit_cname)
 
@@ -1798,6 +1818,12 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
                 env.module_cname,
                 Naming.builtins_cname,
                 code.error_goto(self.pos)))
+        if Options.embed:
+            code.putln(
+                'if (__Pyx_SetAttrString(%s, "__name__", %s) < 0) %s;' % (
+                    env.module_cname,
+                    self.__main__cname,
+                    code.error_goto(self.pos)))
         if Options.pre_import is not None:
             code.putln(
                 '%s = PyImport_AddModule(__Pyx_NAMESTR("%s"));' % (
@@ -2442,3 +2468,35 @@ static __Pyx_RefnannyAPIStruct *__Pyx_Refnanny = NULL;
 #define __Pyx_XGIVEREF(r) if((r) == NULL) ; else __Pyx_GIVEREF(r)
 #define __Pyx_XGOTREF(r) if((r) == NULL) ; else __Pyx_GOTREF(r)
 """)
+
+main_method = UtilityCode(
+impl = """
+int main(int argc, char** argv) {
+    int r = 0;
+    PyObject* m = NULL;
+    Py_SetProgramName(argv[0]);
+    Py_Initialize();
+    PySys_SetArgv(argc, argv);
+#if PY_MAJOR_VERSION < 3
+        init%(module_name)s();
+#else
+        m = PyInit_%(module_name)s(name);
+#endif
+    if (PyErr_Occurred() != NULL) {
+        r = 1;
+        PyErr_Print(); /* This exits with the right code if SystemExit. */
+        if (Py_FlushLine()) PyErr_Clear();
+    }
+    Py_XDECREF(m);
+    Py_Finalize();
+    return r;
+}
+""")
+
+packed_struct_utility_code = UtilityCode(proto="""
+#if defined(__GNUC__)
+#define __Pyx_PACKED __attribute__((__packed__))
+#else
+#define __Pyx_PACKED
+#endif
+""", impl="")

Cython/Compiler/Nodes.py

@@ -840,16 +840,19 @@ class CStructOrUnionDefNode(StatNode):
     #  in_pxd        boolean
     #  attributes    [CVarDefNode] or None
     #  entry         Entry
+    #  packed        boolean
     
     child_attrs = ["attributes"]
 
     def analyse_declarations(self, env):
         scope = None
+        if self.visibility == 'extern' and self.packed:
+            error(self.pos, "Cannot declare extern struct as 'packed'")
         if self.attributes is not None:
             scope = StructOrUnionScope(self.name)
         self.entry = env.declare_struct_or_union(
             self.name, self.kind, scope, self.typedef_flag, self.pos,
-            self.cname, visibility = self.visibility)
+            self.cname, visibility = self.visibility, packed = self.packed)
         if self.attributes is not None:
             if self.in_pxd and not env.in_cinclude:
                 self.entry.defined_in_pxd = 1

Cython/Compiler/Options.py

@@ -53,6 +53,11 @@ optimize_simple_methods = 1
 # Append the c file and line number to the traceback for exceptions. 
 c_line_in_traceback = 1
 
+# Whether or not to embed the Python interpreter, for use in making a 
+# standalone executable. This will provide a main() method which simply 
+# executes the body of this module. 
+embed = False
+
 
 # Declare pragmas
 option_defaults = {

Cython/Compiler/Parsing.py

@@ -2078,7 +2078,7 @@ def p_cdef_statement(s, ctx):
         #if ctx.api:
         #    error(pos, "'api' not allowed with extension class")
         return p_c_class_definition(s, pos, ctx)
-    elif s.sy == 'IDENT' and s.systring in struct_union_or_enum:
+    elif s.sy == 'IDENT' and s.systring in ("struct", "union", "enum", "packed"):
         if ctx.level not in ('module', 'module_pxd'):
             error(pos, "C struct/union/enum definition not allowed here")
         #if ctx.visibility == 'public':
@@ -2114,10 +2114,6 @@ def p_cdef_extern_block(s, pos, ctx):
         include_file = include_file,
         body = body)
 
-struct_union_or_enum = (
-    "struct", "union", "enum"
-)
-
 def p_c_enum_definition(s, pos, ctx):
     # s.sy == ident 'enum'
     s.next()
@@ -2168,6 +2164,12 @@ def p_c_enum_item(s, items):
         name = name, cname = cname, value = value))
 
 def p_c_struct_or_union_definition(s, pos, ctx):
+    packed = False
+    if s.systring == 'packed':
+        packed = True
+        s.next()
+        if s.sy != 'IDENT' or s.systring != 'struct':
+            s.expected('struct')
     # s.sy == ident 'struct' or 'union'
     kind = s.systring
     s.next()
@@ -2193,7 +2195,7 @@ def p_c_struct_or_union_definition(s, pos, ctx):
     return Nodes.CStructOrUnionDefNode(pos, 
         name = name, cname = cname, kind = kind, attributes = attributes,
         typedef_flag = ctx.typedef_flag, visibility = ctx.visibility,
-        in_pxd = ctx.level == 'module_pxd')
+        in_pxd = ctx.level == 'module_pxd', packed = packed)
 
 def p_visibility(s, prev_visibility):
     pos = s.position()
@@ -2265,7 +2267,7 @@ def p_ctypedef_statement(s, ctx):
         ctx.api = 1
     if s.sy == 'class':
         return p_c_class_definition(s, pos, ctx)
-    elif s.sy == 'IDENT' and s.systring in ('struct', 'union', 'enum'):
+    elif s.sy == 'IDENT' and s.systring in ('packed', 'struct', 'union', 'enum'):
         if s.systring == 'enum':
             return p_c_enum_definition(s, pos, ctx)
         else:

Cython/Compiler/PyrexTypes.py

@@ -1023,11 +1023,12 @@ class CStructOrUnionType(CType):
     #  kind          string              "struct" or "union"
     #  scope         StructOrUnionScope, or None if incomplete
     #  typedef_flag  boolean
+    #  packed        boolean
     
     is_struct_or_union = 1
     has_attributes = 1
     
-    def __init__(self, name, kind, scope, typedef_flag, cname):
+    def __init__(self, name, kind, scope, typedef_flag, cname, packed=False):
         self.name = name
         self.cname = cname
         self.kind = kind
@@ -1038,6 +1039,7 @@ class CStructOrUnionType(CType):
             self.to_py_function = "%s_to_py_%s" % (Naming.convert_func_prefix, self.cname)
         self.exception_check = True
         self._convert_code = None
+        self.packed = packed
         
     def create_convert_utility_code(self, env):
         if env.outer_scope is None:

Cython/Compiler/Scanning.py

@@ -466,7 +466,7 @@ class PyrexScanner(Scanner):
         else:
             self.expected(what, message)
     
-    def expected(self, what, message):
+    def expected(self, what, message = None):
         if message:
             self.error(message)
         else:

Cython/Compiler/Symtab.py

@@ -353,7 +353,8 @@ class Scope(object):
         return entry
         
     def declare_struct_or_union(self, name, kind, scope, 
-            typedef_flag, pos, cname = None, visibility = 'private'):
+            typedef_flag, pos, cname = None, visibility = 'private',
+            packed = False):
         # Add an entry for a struct or union definition.
         if not cname:
             if self.in_cinclude or visibility == 'public':
@@ -363,7 +364,7 @@ class Scope(object):
         entry = self.lookup_here(name)
         if not entry:
             type = PyrexTypes.CStructOrUnionType(
-                name, kind, scope, typedef_flag, cname)
+                name, kind, scope, typedef_flag, cname, packed)
             entry = self.declare_type(name, type, pos, cname,
                 visibility = visibility, defining = scope is not None)
             self.sue_entries.append(entry)

Demos/embed/Makefile

-PYVERSION = 2.2
-PYHOME = $(HOME)/pkg/python/$(PYVERSION)
-PYARCH = $(PYHOME)/$(ARCH)
-PYINCLUDE = \
-	-I$(PYHOME)/include/python$(PYVERSION) \
-	-I$(PYARCH)/include/python$(PYVERSION)
-PYLIB = -L$(PYARCH)/lib/python$(PYVERSION)/config \
-	-lpython$(PYVERSION) \
-	-ldl -lpthread -lutil -lm
+# Makefile for creating our standalone Cython program
+PYVERSION=2.3
+PYPREFIX=/usr
+INCLUDES=-I$(PYPREFIX)/include/python$(PYVERSION)
+
+embedded: embedded.o
+	gcc -o $@ $^ -lpython$(PYVERSION)
 
-%.c:	%.pyx
-	../../bin/cython $<
+embedded.o: embedded.c
+	gcc -c $^ $(INCLUDES)
 
-%.o:	%.c
-	gcc -c -fPIC $(PYINCLUDE) $<
+embedded.c: embedded.pyx
+	@python ../../cython.py --embed embedded.pyx
 
-#%.so:	%.o
-#	gcc -shared $< -lm -o $@
-
-all:	main
-
-main:	main.o embedded.o
-	gcc main.o embedded.o $(PYLIB) -o main
+all: embedded
 
 clean:
 	@echo Cleaning Demos/embed
-	@rm -f *~ *.o *.so core core.* embedded.h embedded.c main
-
-embedded.h:	embedded.c
-main.o:		embedded.h
+	@rm -f *~ *.o *.so core core.* *.c embedded

Demos/embed/Makefile.unix

-PYVERSION = 2.2
-PYHOME = $(HOME)/pkg/python/$(PYVERSION)
-PYARCH = $(PYHOME)/$(ARCH)
-PYINCLUDE = \
-	-I$(PYHOME)/include/python$(PYVERSION) \
-	-I$(PYARCH)/include/python$(PYVERSION)
-PYLIB = -L$(PYARCH)/lib/python$(PYVERSION)/config \
-	-lpython$(PYVERSION) \
-	-ldl -lpthread -lutil -lm
+# Makefile for creating our standalone Cython program
+PYVERSION=2.3
+PYPREFIX=/usr
+INCLUDES=-I$(PYPREFIX)/include/python$(PYVERSION)
+
+embedded: embedded.o
+	gcc -o $@ $^ -lpython$(PYVERSION)
 
-%.c:	%.pyx
-	../../bin/cython $<
+embedded.o: embedded.c
+	gcc -c $^ $(INCLUDES)
 
-%.o:	%.c
-	gcc -c -fPIC $(PYINCLUDE) $<
+embedded.c: embedded.pyx
+	@python ../../cython.py --embed embedded.pyx
 
-#%.so:	%.o
-#	gcc -shared $< -lm -o $@
-
-all:	main
-
-main:	main.o embedded.o
-	gcc main.o embedded.o $(PYLIB) -o main
+all: embedded
 
 clean:
 	@echo Cleaning Demos/embed
-	@rm -f *~ *.o *.so core core.* embedded.h embedded.c main
-
-embedded.h:	embedded.c
-main.o:		embedded.h
+	@rm -f *~ *.o *.so core core.* *.c embedded

Demos/embed/embedded.pyx

-cdef public void spam():
-  praise()
 
-def praise():
-  print "Spam, glorious spam!"
+print __name__
+
+if __name__ == "__main__":
+    print "Hi, I'm embedded."
+else:
+    print "I'm being imported."

tests/errors/e2_packedstruct_T290.pyx

+cdef packed foo:
+    pass
+
+_ERRORS = u"""
+1:12: Expected 'struct'
+"""

tests/errors/e_packedstruct_T290.pyx

+cdef extern:
+    cdef packed struct MyStruct:
+        char a
+
+_ERRORS = u"""
+2:9: Cannot declare extern struct as 'packed'
+"""

tests/run/packedstruct_T290.pyx

+"""
+>>> f()
+(9, 9)
+"""
+
+cdef packed struct MyCdefStruct:
+    char a
+    double b
+
+ctypedef packed struct MyCTypeDefStruct:
+    char a
+    double b
+
+def f():
+    return (sizeof(MyCdefStruct), sizeof(MyCTypeDefStruct))
+