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import marshal
import bkfile
# Write a file containing frozen code for the modules in the dictionary.
header = """
#include "Python.h"
static struct _frozen _PyImport_FrozenModules[] = {
"""
trailer = """\
{0, 0, 0} /* sentinel */
};
"""
# if __debug__ == 0 (i.e. -O option given), set Py_OptimizeFlag in frozen app.
default_entry_point = """
int
main(int argc, char **argv)
{
extern int Py_FrozenMain(int, char **);
""" + ((not __debug__ and """
Py_OptimizeFlag++;
""") or "") + """
PyImport_FrozenModules = _PyImport_FrozenModules;
return Py_FrozenMain(argc, argv);
}
"""
def makefreeze(base, dict, debug=0, entry_point=None, fail_import=()):
if entry_point is None: entry_point = default_entry_point
done = []
files = []
mods = sorted(dict.keys())
for mod in mods:
m = dict[mod]
mangled = "__".join(mod.split("."))
if m.__code__:
file = 'M_' + mangled + '.c'
with bkfile.open(base + file, 'w') as outfp:
files.append(file)
if debug:
print("freezing", mod, "...")
str = marshal.dumps(m.__code__)
size = len(str)
if m.__path__:
# Indicate package by negative size
size = -size
done.append((mod, mangled, size))
writecode(outfp, mangled, str)
if debug:
print("generating table of frozen modules")
with bkfile.open(base + 'frozen.c', 'w') as outfp:
for mod, mangled, size in done:
outfp.write('extern unsigned char M_%s[];\n' % mangled)
outfp.write(header)
for mod, mangled, size in done:
outfp.write('\t{"%s", M_%s, %d},\n' % (mod, mangled, size))
outfp.write('\n')
# The following modules have a NULL code pointer, indicating
# that the frozen program should not search for them on the host
# system. Importing them will *always* raise an ImportError.
# The zero value size is never used.
for mod in fail_import:
outfp.write('\t{"%s", NULL, 0},\n' % (mod,))
outfp.write(trailer)
outfp.write(entry_point)
return files
# Write a C initializer for a module containing the frozen python code.
# The array is called M_<mod>.
def writecode(outfp, mod, str):
outfp.write('unsigned char M_%s[] = {' % mod)
for i in range(0, len(str), 16):
outfp.write('\n\t')
for c in bytes(str[i:i+16]):
outfp.write('%d,' % c)
outfp.write('\n};\n')
## def writecode(outfp, mod, str):
## outfp.write('unsigned char M_%s[%d] = "%s";\n' % (mod, len(str),
## '\\"'.join(map(lambda s: repr(s)[1:-1], str.split('"')))))