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+"""Extension management for Windows.
+
+Under Windows it is unlikely the .obj files are of use, as special compiler options
+are needed (primarily to toggle the behavior of "public" symbols.
+
+I dont consider it worth parsing the MSVC makefiles for compiler options. Even if
+we get it just right, a specific freeze application may have specific compiler
+options anyway (eg, to enable or disable specific functionality)
+
+So my basic stragtegy is:
+
+* Have some Windows INI files which "describe" one or more extension modules.
+ (Freeze comes with a default one for all known modules - but you can specify
+ your own).
+* This description can include:
+ - The MSVC .dsp file for the extension. The .c source file names
+ are extraced from there.
+ - Specific compiler/linker options
+ - Flag to indicate if Unicode compilation is expected.
+
+At the moment the name and location of this INI file is hardcoded,
+but an obvious enhancement would be to provide command line options.
+"""
+
+import os, sys
+try:
+ import win32api
+except ImportError:
+ win32api = None # User has already been warned
+
+class CExtension:
+ """An abstraction of an extension implemented in C/C++
+ """
+ def __init__(self, name, sourceFiles):
+ self.name = name
+ # A list of strings defining additional compiler options.
+ self.sourceFiles = sourceFiles
+ # A list of special compiler options to be applied to
+ # all source modules in this extension.
+ self.compilerOptions = []
+ # A list of .lib files the final .EXE will need.
+ self.linkerLibs = []
+
+ def GetSourceFiles(self):
+ return self.sourceFiles
+
+ def AddCompilerOption(self, option):
+ self.compilerOptions.append(option)
+ def GetCompilerOptions(self):
+ return self.compilerOptions
+
+ def AddLinkerLib(self, lib):
+ self.linkerLibs.append(lib)
+ def GetLinkerLibs(self):
+ return self.linkerLibs
+
+def checkextensions(unknown, extra_inis, prefix):
+ # Create a table of frozen extensions
+
+ defaultMapName = os.path.join( os.path.split(sys.argv[0])[0], "extensions_win32.ini")
+ if not os.path.isfile(defaultMapName):
+ sys.stderr.write("WARNING: %s can not be found - standard extensions may not be found\n" % defaultMapName)
+ else:
+ # must go on end, so other inis can override.
+ extra_inis.append(defaultMapName)
+
+ ret = []
+ for mod in unknown:
+ for ini in extra_inis:
+# print "Looking for", mod, "in", win32api.GetFullPathName(ini),"...",
+ defn = get_extension_defn( mod, ini, prefix )
+ if defn is not None:
+# print "Yay - found it!"
+ ret.append( defn )
+ break
+# print "Nope!"
+ else: # For not broken!
+ sys.stderr.write("No definition of module %s in any specified map file.\n" % (mod))
+
+ return ret
+
+def get_extension_defn(moduleName, mapFileName, prefix):
+ if win32api is None: return None
+ os.environ['PYTHONPREFIX'] = prefix
+ dsp = win32api.GetProfileVal(moduleName, "dsp", "", mapFileName)
+ if dsp=="":
+ return None
+
+ # We allow environment variables in the file name
+ dsp = win32api.ExpandEnvironmentStrings(dsp)
+ # If the path to the .DSP file is not absolute, assume it is relative
+ # to the description file.
+ if not os.path.isabs(dsp):
+ dsp = os.path.join( os.path.split(mapFileName)[0], dsp)
+ # Parse it to extract the source files.
+ sourceFiles = parse_dsp(dsp)
+ if sourceFiles is None:
+ return None
+
+ module = CExtension(moduleName, sourceFiles)
+ # Put the path to the DSP into the environment so entries can reference it.
+ os.environ['dsp_path'] = os.path.split(dsp)[0]
+ os.environ['ini_path'] = os.path.split(mapFileName)[0]
+
+ cl_options = win32api.GetProfileVal(moduleName, "cl", "", mapFileName)
+ if cl_options:
+ module.AddCompilerOption(win32api.ExpandEnvironmentStrings(cl_options))
+
+ exclude = win32api.GetProfileVal(moduleName, "exclude", "", mapFileName)
+ exclude = exclude.split()
+
+ if win32api.GetProfileVal(moduleName, "Unicode", 0, mapFileName):
+ module.AddCompilerOption('/D UNICODE /D _UNICODE')
+
+ libs = win32api.GetProfileVal(moduleName, "libs", "", mapFileName).split()
+ for lib in libs:
+ module.AddLinkerLib(win32api.ExpandEnvironmentStrings(lib))
+
+ for exc in exclude:
+ if exc in module.sourceFiles:
+ modules.sourceFiles.remove(exc)
+
+ return module
+
+# Given an MSVC DSP file, locate C source files it uses
+# returns a list of source files.
+def parse_dsp(dsp):
+# print "Processing", dsp
+ # For now, only support
+ ret = []
+ dsp_path, dsp_name = os.path.split(dsp)
+ try:
+ lines = open(dsp, "r").readlines()
+ except IOError, msg:
+ sys.stderr.write("%s: %s\n" % (dsp, msg))
+ return None
+ for line in lines:
+ fields = line.strip().split("=", 2)
+ if fields[0]=="SOURCE":
+ if os.path.splitext(fields[1])[1].lower() in ['.cpp', '.c']:
+ ret.append( win32api.GetFullPathName(os.path.join(dsp_path, fields[1] ) ) )
+ return ret
+
+def write_extension_table(fname, modules):
+ fp = open(fname, "w")
+ try:
+ fp.write (ext_src_header)
+ # Write fn protos
+ for module in modules:
+ # bit of a hack for .pyd's as part of packages.
+ name = module.name.split('.')[-1]
+ fp.write('extern void init%s(void);\n' % (name) )
+ # Write the table
+ fp.write (ext_tab_header)
+ for module in modules:
+ name = module.name.split('.')[-1]
+ fp.write('\t{"%s", init%s},\n' % (name, name) )
+
+ fp.write (ext_tab_footer)
+ fp.write(ext_src_footer)
+ finally:
+ fp.close()
+
+
+ext_src_header = """\
+#include "Python.h"
+"""
+
+ext_tab_header = """\
+
+static struct _inittab extensions[] = {
+"""
+
+ext_tab_footer = """\
+ /* Sentinel */
+ {0, 0}
+};
+"""
+
+ext_src_footer = """\
+extern DL_IMPORT(int) PyImport_ExtendInittab(struct _inittab *newtab);
+
+int PyInitFrozenExtensions()
+{
+ return PyImport_ExtendInittab(extensions);
+}
+
+"""