def test_it(self):
pydffi.dlopen(_HERE + '/library.so')
FFI = pydffi.FFI()
CU = FFI.cdef('#include "{}/library.h"'.format(_HERE))
foo = CU.types.Foo(bar=1)
CU.funcs.by_ptr(FFI.ptr(foo))
self.assertEqual(foo.bar, 2);
def __init__(self, llvm_root):
pydffi.dlopen(os.path.join(llvm_root, "lib", "libLLVM.so"))
self.FFI=pydffi.FFI(includeDirs=[os.path.join(llvm_root, "include")])
self.CU=self.FFI.cdef('''
#include <llvm-c/Target.h>
#include <llvm-c/Disassembler.h>
size_t disasm(LLVMDisasmContextRef Disasm, uint8_t const* In, size_t InLen, uint64_t Addr, char* Out, size_t OutLen)
{
return LLVMDisasmInstruction(Disasm, (uint8_t*)In, InLen, Addr, Out, OutLen);
}
''')
self.CU.funcs.LLVMInitializeX86Disassembler()
self.CU.funcs.LLVMInitializeX86Target()
self.CU.funcs.LLVMInitializeX86TargetInfo()
self.CU.funcs.LLVMInitializeX86TargetMC()
self.llvm_disasm = self.CU.funcs.LLVMCreateDisasm("x86_64-pc-linux-gnu",
(self.FFI.VoidPtrTy)(), self.FFI.Int(0), (self.FFI.VoidPtrTy)(), (self.FFI.VoidPtrTy)())
if int(self.llvm_disasm) == 0:
raise RuntimeError("unable to create an LLVM disassembler engine")
# Set Intel syntax
self.CU.funcs.LLVMSetDisasmOptions(self.llvm_disasm, 4)
self.LLVMDisasmInstruction = self.CU.funcs.disasm
self.tmpbuf = self.FFI.arrayType(self.FFI.CharTy, 256)()
import pydffi
import sys
import os
import sage
import random
if len(sys.argv) <= 1:
print("Usage: %s path/to/libsss.so" % sys.argv[0], file=sys.stderr)
sys.exit(1)
pydffi.dlopen(sys.argv[1])
FFI=pydffi.FFI()
CU=FFI.cdef('''
#include <stdint.h>
void sss_create_keyshares_impl(uint8_t *out,
const uint8_t* key,
const uint8_t* poly, // was uint32_t*
uint8_t n,
uint8_t k);
int sss_decrypt(uint8_t *out, uint8_t const* in, uint8_t const* key);
''')
LEN_KEY=32
LEN_POLY=32
LEN_KEYSHARE=32+1
NSHARES=3
NPOLYS = NSHARES-1
LEN_POLYS=LEN_POLY*NPOLYS
LEN_KEYSHARES=LEN_KEYSHARE*NSHARES
import pydffi
import sys
pydffi.dlopen("/usr/lib/x86_64-linux-gnu/libarchive.so")
D = pydffi.FFI()
CU = D.cdef('''
#include <archive.h>
#include <archive_entry.h>
''')
funcs = CU.funcs
archive_read_next_header = funcs.archive_read_next_header
archive_entry_pathname_utf8 = funcs.archive_entry_pathname_utf8
archive_read_data_skip = funcs.archive_read_data_skip
a = funcs.archive_read_new()
funcs.archive_read_support_filter_all(a)
funcs.archive_read_support_format_all(a)
r = funcs.archive_read_open_filename(a, sys.argv[1], 10240)
if r != 0:
raise RuntimeError("unable to open archive")
entry = D.ptr(CU.types.archive_entry)()
while archive_read_next_header(a, D.ptr(entry)) == 0:
pathname = archive_entry_pathname_utf8(entry)
print(pathname.cstr.tobytes().decode("utf8"))
archive_read_data_skip(a)
funcs.archive_read_free(a)
import math
import pydffi
pydffi.dlopen("/usr/lib/x86_64-linux-gnu/libfftw3.so")
FFI = pydffi.FFI()
FFT = FFI.cdef("#include <fftw3.h>")
# Adapted from https://github.com/undees/fftw-example/blob/master/fftw_example.c
NUM_POINTS = 64
fftw_complex = FFT.types.fftw_complex
signal = FFI.arrayType(fftw_complex, NUM_POINTS)();
result = FFI.arrayType(fftw_complex, NUM_POINTS)();
def acquire_from_somewhere(signal):
for i in range(NUM_POINTS):
theta = float(i) / float(NUM_POINTS) * math.pi;
signal[i][0] = 1.0 * math.cos(10.0 * theta) + \
0.5 * math.cos(25.0 * theta);
signal[i][1] = 1.0 * math.sin(10.0 * theta) + \
0.5 * math.sin(25.0 * theta);
def do_something_with(result):
for i in range(NUM_POINTS):
mag = math.sqrt(result[i][0] * result[i][0] + \
result[i][1] * result[i][1]);
print("%0.4f" % mag);
plan = FFT.funcs.fftw_plan_dft_1d(NUM_POINTS, signal, result, -1, 1<<6)
# REQUIRES: linux && libarchive
# RUN: tar cf %t.tar %s
# RUN: %python "%s" "%t.tar" | %FileCheck "%s"
# CHECK: archive.py
import pydffi
import ctypes.util
import sys
pydffi.dlopen(ctypes.util.find_library("archive"))
D = pydffi.FFI()
CU = D.cdef('''
#include <archive.h>
#include <archive_entry.h>
''')
funcs = CU.funcs
archive_read_next_header = funcs.archive_read_next_header
archive_entry_pathname_utf8 = funcs.archive_entry_pathname_utf8
archive_read_data_skip = funcs.archive_read_data_skip
a = funcs.archive_read_new()
funcs.archive_read_support_filter_all(a)
funcs.archive_read_support_format_all(a)
r = funcs.archive_read_open_filename(a, sys.argv[1], 10240)
if r != 0:
raise RuntimeError("unable to open archive")
entry = pydffi.ptr(CU.types.archive_entry)()
while archive_read_next_header(a, pydffi.ptr(entry)) == 0:
pathname = archive_entry_pathname_utf8(entry)
# REQUIRES: linux && libfftw3
# RUN: %python "%s"
import math
import ctypes.util
import pydffi
pydffi.dlopen(ctypes.util.find_library("fftw3"))
FFI = pydffi.FFI()
FFT = FFI.cdef("#include <fftw3.h>")
# Adapted from https://github.com/undees/fftw-example/blob/master/fftw_example.c
NUM_POINTS = 64
fftw_complex = FFT.types.fftw_complex
signal = FFI.arrayType(fftw_complex, NUM_POINTS)()
result = FFI.arrayType(fftw_complex, NUM_POINTS)()
def acquire_from_somewhere(signal):
for i in range(NUM_POINTS):
theta = float(i) / float(NUM_POINTS) * math.pi
signal[i][0] = 1.0 * math.cos(10.0 * theta) + \
0.5 * math.cos(25.0 * theta)
signal[i][1] = 1.0 * math.sin(10.0 * theta) + \
0.5 * math.sin(25.0 * theta)
def do_something_with(result):
for i in range(NUM_POINTS):
