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/* This is built as a stand-alone executable by the Makefile, and helps turn

Lib/importlib/_bootstrap.py into a frozen module in Python/importlib.h

*/

#include <Python.h>

#include <marshal.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#ifndef MS_WINDOWS

#include <unistd.h>

#endif

/* To avoid a circular dependency on frozen.o, we create our own structure

of frozen modules instead, left deliberately blank so as to avoid

unintentional import of a stale version of _frozen_importlib. */

static const struct _frozen _PyImport_FrozenModules[] = {

{0, 0, 0} /* sentinel */

};

#ifndef MS_WINDOWS

/* On Windows, this links with the regular pythonXY.dll, so this variable comes

from frozen.obj. In the Makefile, frozen.o is not linked into this executable,

so we define the variable here. */

const struct _frozen *PyImport_FrozenModules;

#endif

const char header[] = "/* Auto-generated by Programs/_freeze_importlib.c */";

int

main(int argc, char *argv[])

{

char *inpath, *outpath, *code_name;

FILE *infile = NULL, *outfile = NULL;

struct _Py_stat_struct status;

size_t text_size, data_size, n;

char *text = NULL;

unsigned char *data;

PyObject *code = NULL, *marshalled = NULL;

int is_bootstrap = 1;

PyImport_FrozenModules = _PyImport_FrozenModules;

if (argc != 3) {

fprintf(stderr, "need to specify input and output paths\n");

return 2;

}

inpath = argv[1];

outpath = argv[2];

infile = fopen(inpath, "rb");

if (infile == NULL) {

fprintf(stderr, "cannot open '%s' for reading\n", inpath);

goto error;

}

if (_Py_fstat_noraise(fileno(infile), &status)) {

fprintf(stderr, "cannot fstat '%s'\n", inpath);

goto error;

}

text_size = (size_t)status.st_size;

text = (char *) malloc(text_size + 1);

if (text == NULL) {

fprintf(stderr, "could not allocate %ld bytes\n", (long) text_size);

goto error;

}

n = fread(text, 1, text_size, infile);

fclose(infile);

infile = NULL;

if (n < text_size) {

fprintf(stderr, "read too short: got %ld instead of %ld bytes\n",

(long) n, (long) text_size);

goto error;

}

text[text_size] = '\0';

Py_NoUserSiteDirectory++;

Py_NoSiteFlag++;

Py_IgnoreEnvironmentFlag++;

Py_FrozenFlag++;

Py_SetProgramName(L"./_freeze_importlib");

/* Don't install importlib, since it could execute outdated bytecode. */

_Py_InitializeEx_Private(1, 0);

if (strstr(inpath, "_external") != NULL) {

is_bootstrap = 0;

}

code_name = is_bootstrap ?

"<frozen importlib._bootstrap>" :

"<frozen importlib._bootstrap_external>";

code = Py_CompileStringExFlags(text, code_name, Py_file_input, NULL, 0);

if (code == NULL)

goto error;

free(text);

text = NULL;

marshalled = PyMarshal_WriteObjectToString(code, Py_MARSHAL_VERSION);

Py_CLEAR(code);

if (marshalled == NULL)

goto error;

assert(PyBytes_CheckExact(marshalled));

data = (unsigned char *) PyBytes_AS_STRING(marshalled);

data_size = PyBytes_GET_SIZE(marshalled);

/* Open the file in text mode. The hg checkout should be using the eol extension,

which in turn should cause the EOL style match the C library's text mode */

outfile = fopen(outpath, "w");

if (outfile == NULL) {

fprintf(stderr, "cannot open '%s' for writing\n", outpath);

goto error;

}

fprintf(outfile, "%s\n", header);

if (is_bootstrap)

fprintf(outfile, "const unsigned char _Py_M__importlib[] = {\n");

else

fprintf(outfile,

"const unsigned char _Py_M__importlib_external[] = {\n");

for (n = 0; n < data_size; n += 16) {

size_t i, end = Py_MIN(n + 16, data_size);

fprintf(outfile, " ");

for (i = n; i < end; i++) {

fprintf(outfile, "%d,", (unsigned int) data[i]);

}

fprintf(outfile, "\n");

}

fprintf(outfile, "};\n");

Py_CLEAR(marshalled);

Py_Finalize();

if (outfile) {

if (ferror(outfile)) {

fprintf(stderr, "error when writing to '%s'\n", outpath);

goto error;

}

fclose(outfile);

}

return 0;

error:

PyErr_Print();

Py_Finalize();

if (infile)

fclose(infile);

if (outfile)

fclose(outfile);

if (text)

free(text);

if (marshalled)

Py_DECREF(marshalled);

return 1;

}