#include <Python.h>
#include "structmember.h"
#include <stdint.h>
#include <inttypes.h>
#include "../queue.h"
#include "../vm_mngr.h"
#include "../vm_mngr_py.h"
#include "../JitCore.h"
#include "JitCore_arm.h"



reg_dict gpreg_dict[] = { {.name = "R0", .offset = offsetof(vm_cpu_t, R0)},
			  {.name = "R1", .offset = offsetof(vm_cpu_t, R1)},
			  {.name = "R2", .offset = offsetof(vm_cpu_t, R2)},
			  {.name = "R3", .offset = offsetof(vm_cpu_t, R3)},
			  {.name = "R4", .offset = offsetof(vm_cpu_t, R4)},
			  {.name = "R5", .offset = offsetof(vm_cpu_t, R5)},
			  {.name = "R6", .offset = offsetof(vm_cpu_t, R6)},
			  {.name = "R7", .offset = offsetof(vm_cpu_t, R7)},
			  {.name = "R8", .offset = offsetof(vm_cpu_t, R8)},
			  {.name = "R9", .offset = offsetof(vm_cpu_t, R9)},
			  {.name = "R10", .offset = offsetof(vm_cpu_t, R10)},
			  {.name = "R11", .offset = offsetof(vm_cpu_t, R11)},
			  {.name = "R12", .offset = offsetof(vm_cpu_t, R12)},
			  {.name = "SP", .offset = offsetof(vm_cpu_t, SP)},
			  {.name = "LR", .offset = offsetof(vm_cpu_t, LR)},
			  {.name = "PC", .offset = offsetof(vm_cpu_t, PC)},

			  {.name = "zf", .offset = offsetof(vm_cpu_t, zf)},
			  {.name = "nf", .offset = offsetof(vm_cpu_t, nf)},
			  {.name = "of", .offset = offsetof(vm_cpu_t, of)},
			  {.name = "cf", .offset = offsetof(vm_cpu_t, cf)},
};

/************************** JitCpu object **************************/




PyObject* cpu_get_gpreg(JitCpu* self)
{
    PyObject *dict = PyDict_New();
    PyObject *o;

    get_reg(R0);
    get_reg(R1);
    get_reg(R2);
    get_reg(R3);
    get_reg(R4);
    get_reg(R5);
    get_reg(R6);
    get_reg(R7);
    get_reg(R8);
    get_reg(R9);
    get_reg(R10);
    get_reg(R11);
    get_reg(R12);
    get_reg(SP);
    get_reg(LR);
    get_reg(PC);

    get_reg(zf);
    get_reg(nf);
    get_reg(of);
    get_reg(cf);

    return dict;
}



PyObject* cpu_set_gpreg(JitCpu* self, PyObject *args)
{
    PyObject* dict;
    PyObject *d_key, *d_value = NULL;
    Py_ssize_t pos = 0;
    uint64_t val;
    unsigned int i, found;

    if (!PyArg_ParseTuple(args, "O", &dict))
	    RAISE(PyExc_TypeError,"Cannot parse arguments");
    if(!PyDict_Check(dict))
	    RAISE(PyExc_TypeError, "arg must be dict");
    while(PyDict_Next(dict, &pos, &d_key, &d_value)){
	    if(!PyString_Check(d_key))
		    RAISE(PyExc_TypeError, "key must be str");

	    PyGetInt(d_value, val);

	    found = 0;
	    for (i=0; i < sizeof(gpreg_dict)/sizeof(reg_dict); i++){
		    if (strcmp(PyString_AsString(d_key), gpreg_dict[i].name))
			    continue;
		    *((uint32_t*)(((char*)(self->cpu)) + gpreg_dict[i].offset)) = val;
		    found = 1;
		    break;
	    }

	    if (found)
		    continue;
	    fprintf(stderr, "unkown key: %s\n", PyString_AsString(d_key));
	    RAISE(PyExc_ValueError, "unkown reg");
    }
    Py_INCREF(Py_None);
    return Py_None;
}


PyObject * cpu_init_regs(JitCpu* self)
{
	memset(self->cpu, 0, sizeof(vm_cpu_t));

	Py_INCREF(Py_None);
	return Py_None;
}

void dump_gpregs(vm_cpu_t* vmcpu)
{
	printf("R0  %.8"PRIX32" R1  %.8"PRIX32" R2  %.8"PRIX32" R3  %.8"PRIX32" ",
	       vmcpu->R0, vmcpu->R1, vmcpu->R2, vmcpu->R3);
	printf("R4  %.8"PRIX32" R5  %.8"PRIX32" R6  %.8"PRIX32" R7  %.8"PRIX32"\n",
	       vmcpu->R4, vmcpu->R5, vmcpu->R6, vmcpu->R7);
	printf("R8  %.8"PRIX32" R9  %.8"PRIX32" R10 %.8"PRIX32" R11 %.8"PRIX32" ",
	       vmcpu->R8, vmcpu->R9, vmcpu->R10, vmcpu->R11);
	printf("R12 %.8"PRIX32" SP  %.8"PRIX32" LR  %.8"PRIX32" PC  %.8"PRIX32" ",
	       vmcpu->R12, vmcpu->SP, vmcpu->LR, vmcpu->PC);
	printf("zf %"PRIX32" nf %"PRIX32" of %"PRIX32" cf %"PRIX32"\n",
	       vmcpu->zf, vmcpu->nf, vmcpu->of, vmcpu->cf);
}


PyObject * cpu_dump_gpregs(JitCpu* self, PyObject* args)
{
	vm_cpu_t* vmcpu;

	vmcpu = self->cpu;
	dump_gpregs(vmcpu);
	Py_INCREF(Py_None);
	return Py_None;
}


PyObject* cpu_set_exception(JitCpu* self, PyObject* args)
{
	PyObject *item1;
	uint64_t i;

	if (!PyArg_ParseTuple(args, "O", &item1))
		RAISE(PyExc_TypeError,"Cannot parse arguments");

	PyGetInt(item1, i);

	((vm_cpu_t*)self->cpu)->exception_flags = i;
	Py_INCREF(Py_None);
	return Py_None;
}

PyObject* cpu_get_exception(JitCpu* self, PyObject* args)
{
	return PyLong_FromUnsignedLongLong((uint64_t)(((vm_cpu_t*)self->cpu)->exception_flags));
}





void check_automod(JitCpu* jitcpu, uint64_t addr, uint64_t size)
{
	PyObject *result;

	if (!(((VmMngr*)jitcpu->pyvm)->vm_mngr.exception_flags & EXCEPT_CODE_AUTOMOD))
		return;
	result = PyObject_CallMethod(jitcpu->jitter, "automod_cb", "LL", addr, size);
	Py_DECREF(result);

}

void MEM_WRITE_08(JitCpu* jitcpu, uint64_t addr, uint8_t src)
{
	vm_MEM_WRITE_08(&((VmMngr*)jitcpu->pyvm)->vm_mngr, addr, src);
	check_automod(jitcpu, addr, 8);
}

void MEM_WRITE_16(JitCpu* jitcpu, uint64_t addr, uint16_t src)
{
	vm_MEM_WRITE_16(&((VmMngr*)jitcpu->pyvm)->vm_mngr, addr, src);
	check_automod(jitcpu, addr, 16);
}

void MEM_WRITE_32(JitCpu* jitcpu, uint64_t addr, uint32_t src)
{
	vm_MEM_WRITE_32(&((VmMngr*)jitcpu->pyvm)->vm_mngr, addr, src);
	check_automod(jitcpu, addr, 32);
}

void MEM_WRITE_64(JitCpu* jitcpu, uint64_t addr, uint64_t src)
{
	vm_MEM_WRITE_64(&((VmMngr*)jitcpu->pyvm)->vm_mngr, addr, src);
	check_automod(jitcpu, addr, 64);
}


uint32_t clz(uint32_t arg)
{

	int i;

	for (i=0; i<32; i++) {
		if (arg & (1ull << (31-i)))
			break;
	}
	return i;
}




PyObject* vm_set_mem(JitCpu *self, PyObject* args)
{
       PyObject *py_addr;
       PyObject *py_buffer;
       Py_ssize_t py_length;

       char * buffer;
       uint64_t size;
       uint64_t addr;
       int ret;

       if (!PyArg_ParseTuple(args, "OO", &py_addr, &py_buffer))
	       RAISE(PyExc_TypeError,"Cannot parse arguments");

       PyGetInt(py_addr, addr);

       if(!PyString_Check(py_buffer))
	       RAISE(PyExc_TypeError,"arg must be str");

       size = PyString_Size(py_buffer);
       PyString_AsStringAndSize(py_buffer, &buffer, &py_length);

       ret = vm_write_mem(&(((VmMngr*)self->pyvm)->vm_mngr), addr, buffer, size);
       if (ret < 0)
	       RAISE(PyExc_TypeError,"arg must be str");
       check_automod(self, addr, size*8);

       Py_INCREF(Py_None);
       return Py_None;
}

static PyMemberDef JitCpu_members[] = {
    {NULL}  /* Sentinel */
};

static PyMethodDef JitCpu_methods[] = {
	{"init_regs", (PyCFunction)cpu_init_regs, METH_NOARGS,
	 "X"},
	{"dump_gpregs", (PyCFunction)cpu_dump_gpregs, METH_NOARGS,
	 "X"},
	{"get_gpreg", (PyCFunction)cpu_get_gpreg, METH_NOARGS,
	 "X"},
	{"set_gpreg", (PyCFunction)cpu_set_gpreg, METH_VARARGS,
	 "X"},
	{"get_exception", (PyCFunction)cpu_get_exception, METH_VARARGS,
	 "X"},
	{"set_exception", (PyCFunction)cpu_set_exception, METH_VARARGS,
	 "X"},
	{"set_mem", (PyCFunction)vm_set_mem, METH_VARARGS,
	 "X"},
	{"get_mem", (PyCFunction)vm_get_mem, METH_VARARGS,
	 "X"},
	{NULL}  /* Sentinel */
};

static int
JitCpu_init(JitCpu *self, PyObject *args, PyObject *kwds)
{
	self->cpu = malloc(sizeof(vm_cpu_t));
	if (self->cpu == NULL) {
		fprintf(stderr, "cannot alloc vm_cpu_t\n");
		exit(EXIT_FAILURE);
	}
	return 0;
}

getset_reg_u32(R0);
getset_reg_u32(R1);
getset_reg_u32(R2);
getset_reg_u32(R3);
getset_reg_u32(R4);
getset_reg_u32(R5);
getset_reg_u32(R6);
getset_reg_u32(R7);
getset_reg_u32(R8);
getset_reg_u32(R9);
getset_reg_u32(R10);
getset_reg_u32(R11);
getset_reg_u32(R12);
getset_reg_u32(SP);
getset_reg_u32(LR);
getset_reg_u32(PC);

getset_reg_u32(zf);
getset_reg_u32(nf);
getset_reg_u32(of);
getset_reg_u32(cf);


PyObject* get_gpreg_offset_all(void)
{
    PyObject *dict = PyDict_New();
    PyObject *o;

    get_reg_off(exception_flags);

    get_reg_off(R0);
    get_reg_off(R1);
    get_reg_off(R2);
    get_reg_off(R3);
    get_reg_off(R4);
    get_reg_off(R5);
    get_reg_off(R6);
    get_reg_off(R7);
    get_reg_off(R8);
    get_reg_off(R9);
    get_reg_off(R10);
    get_reg_off(R11);
    get_reg_off(R12);
    get_reg_off(SP);
    get_reg_off(LR);
    get_reg_off(PC);

	/* eflag */
    get_reg_off(zf);
    get_reg_off(nf);
    get_reg_off(of);
    get_reg_off(cf);

    return dict;
}


static PyGetSetDef JitCpu_getseters[] = {
    {"vmmngr",
     (getter)JitCpu_get_vmmngr, (setter)JitCpu_set_vmmngr,
     "vmmngr",
     NULL},

    {"jitter",
     (getter)JitCpu_get_jitter, (setter)JitCpu_set_jitter,
     "jitter",
     NULL},



    {"R0" , (getter)JitCpu_get_R0 , (setter)JitCpu_set_R0 , "R0" , NULL},
    {"R1" , (getter)JitCpu_get_R1 , (setter)JitCpu_set_R1 , "R1" , NULL},
    {"R2" , (getter)JitCpu_get_R2 , (setter)JitCpu_set_R2 , "R2" , NULL},
    {"R3" , (getter)JitCpu_get_R3 , (setter)JitCpu_set_R3 , "R3" , NULL},
    {"R4" , (getter)JitCpu_get_R4 , (setter)JitCpu_set_R4 , "R4" , NULL},
    {"R5" , (getter)JitCpu_get_R5 , (setter)JitCpu_set_R5 , "R5" , NULL},
    {"R6" , (getter)JitCpu_get_R6 , (setter)JitCpu_set_R6 , "R6" , NULL},
    {"R7" , (getter)JitCpu_get_R7 , (setter)JitCpu_set_R7 , "R7" , NULL},
    {"R8" , (getter)JitCpu_get_R8 , (setter)JitCpu_set_R8 , "R8" , NULL},
    {"R9" , (getter)JitCpu_get_R9 , (setter)JitCpu_set_R9 , "R9" , NULL},
    {"R10", (getter)JitCpu_get_R10, (setter)JitCpu_set_R10, "R10", NULL},
    {"R11", (getter)JitCpu_get_R11, (setter)JitCpu_set_R11, "R11", NULL},
    {"R12", (getter)JitCpu_get_R12, (setter)JitCpu_set_R12, "R12", NULL},
    {"SP" , (getter)JitCpu_get_SP , (setter)JitCpu_set_SP , "SP" , NULL},
    {"LR" , (getter)JitCpu_get_LR , (setter)JitCpu_set_LR , "LR" , NULL},
    {"PC" , (getter)JitCpu_get_PC , (setter)JitCpu_set_PC , "PC" , NULL},

    {"zf", (getter)JitCpu_get_zf, (setter)JitCpu_set_zf, "zf", NULL},
    {"nf", (getter)JitCpu_get_nf, (setter)JitCpu_set_nf, "nf", NULL},
    {"of", (getter)JitCpu_get_of, (setter)JitCpu_set_of, "of", NULL},
    {"cf", (getter)JitCpu_get_cf, (setter)JitCpu_set_cf, "cf", NULL},

    {NULL}  /* Sentinel */
};


static PyTypeObject JitCpuType = {
    PyObject_HEAD_INIT(NULL)
    0,                         /*ob_size*/
    "JitCore_arm.JitCpu",      /*tp_name*/
    sizeof(JitCpu),            /*tp_basicsize*/
    0,                         /*tp_itemsize*/
    (destructor)JitCpu_dealloc,/*tp_dealloc*/
    0,                         /*tp_print*/
    0,                         /*tp_getattr*/
    0,                         /*tp_setattr*/
    0,                         /*tp_compare*/
    0,                         /*tp_repr*/
    0,                         /*tp_as_number*/
    0,                         /*tp_as_sequence*/
    0,                         /*tp_as_mapping*/
    0,                         /*tp_hash */
    0,                         /*tp_call*/
    0,                         /*tp_str*/
    0,                         /*tp_getattro*/
    0,                         /*tp_setattro*/
    0,                         /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
    "JitCpu objects",          /* tp_doc */
    0,			       /* tp_traverse */
    0,			       /* tp_clear */
    0,			       /* tp_richcompare */
    0,			       /* tp_weaklistoffset */
    0,			       /* tp_iter */
    0,			       /* tp_iternext */
    JitCpu_methods,            /* tp_methods */
    JitCpu_members,            /* tp_members */
    JitCpu_getseters,          /* tp_getset */
    0,                         /* tp_base */
    0,                         /* tp_dict */
    0,                         /* tp_descr_get */
    0,                         /* tp_descr_set */
    0,                         /* tp_dictoffset */
    (initproc)JitCpu_init,     /* tp_init */
    0,                         /* tp_alloc */
    JitCpu_new,                /* tp_new */
};



static PyMethodDef JitCore_arm_Methods[] = {

	/*

	*/
	{"get_gpreg_offset_all", (PyCFunction)get_gpreg_offset_all, METH_NOARGS},
	{NULL, NULL, 0, NULL}        /* Sentinel */

};

static PyObject *JitCore_arm_Error;

PyMODINIT_FUNC
initJitCore_arm(void)
{
    PyObject *m;

    if (PyType_Ready(&JitCpuType) < 0)
	return;

    m = Py_InitModule("JitCore_arm", JitCore_arm_Methods);
    if (m == NULL)
	    return;

    JitCore_arm_Error = PyErr_NewException("JitCore_arm.error", NULL, NULL);
    Py_INCREF(JitCore_arm_Error);
    PyModule_AddObject(m, "error", JitCore_arm_Error);

    Py_INCREF(&JitCpuType);
    PyModule_AddObject(m, "JitCpu", (PyObject *)&JitCpuType);

}