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pycdc.cpp
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pycdc.cpp
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#include <cstring>
#include <fstream>
#include <iostream>
#include "ASTree.h"
#ifdef WIN32
# define PATHSEP '\\'
#else
# define PATHSEP '/'
#endif
int main(int argc, char* argv[])
{
const char* infile = nullptr;
bool marshalled = false;
const char* version = nullptr;
std::ostream* pyc_output = &std::cout;
std::ofstream out_file;
for (int arg = 1; arg < argc; ++arg) {
if (strcmp(argv[arg], "-o") == 0) {
if (arg + 1 < argc) {
const char* filename = argv[++arg];
out_file.open(filename, std::ios_base::out);
if (out_file.fail()) {
fprintf(stderr, "Error opening file '%s' for writing\n",
filename);
return 1;
}
pyc_output = &out_file;
} else {
fputs("Option '-o' requires a filename\n", stderr);
return 1;
}
} else if (strcmp(argv[arg], "-c") == 0) {
marshalled = true;
} else if (strcmp(argv[arg], "-v") == 0) {
if (arg + 1 < argc) {
version = argv[++arg];
} else {
fputs("Option '-v' requires a version\n", stderr);
return 1;
}
} else if (strcmp(argv[arg], "--help") == 0 || strcmp(argv[arg], "-h") == 0) {
fprintf(stderr, "Usage: %s [options] input.pyc\n\n", argv[0]);
fputs("Options:\n", stderr);
fputs(" -o <filename> Write output to <filename> (default: stdout)\n", stderr);
fputs(" -c Specify loading a compiled code object. Requires the version to be set\n", stderr);
fputs(" -v <x.y> Specify a Python version for loading a compiled code object\n", stderr);
fputs(" --help Show this help text and then exit\n", stderr);
return 0;
} else {
infile = argv[arg];
}
}
if (!infile) {
fputs("No input file specified\n", stderr);
return 1;
}
PycModule mod;
if (!marshalled) {
try {
mod.loadFromFile(infile);
} catch (std::exception& ex) {
fprintf(stderr, "Error loading file %s: %s\n", infile, ex.what());
return 1;
}
} else {
if (!version) {
fputs("Opening raw code objects requires a version to be specified\n", stderr);
return 1;
}
std::string s(version);
auto dot = s.find('.');
if (dot == std::string::npos || dot == s.size()-1) {
fputs("Unable to parse version string (use the format x.y)\n", stderr);
return 1;
}
int major = std::stoi(s.substr(0, dot));
int minor = std::stoi(s.substr(dot+1, s.size()));
mod.loadFromMarshalledFile(infile, major, minor);
}
if (!mod.isValid()) {
fprintf(stderr, "Could not load file %s\n", infile);
return 1;
}
const char* dispname = strrchr(infile, PATHSEP);
dispname = (dispname == NULL) ? infile : dispname + 1;
*pyc_output << "# Source Generated with Decompyle++\n";
formatted_print(*pyc_output, "# File: %s (Python %d.%d%s)\n\n", dispname,
mod.majorVer(), mod.minorVer(),
(mod.majorVer() < 3 && mod.isUnicode()) ? " Unicode" : "");
try {
decompyle(mod.code(), &mod, *pyc_output);
} catch (std::exception& ex) {
fprintf(stderr, "Error decompyling %s: %s\n", infile, ex.what());
return 1;
}
return 0;
}