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pocketpy/src/modules/pickle.c
blueloveTH 5e5f2525b4 add pickle module
2024-12-13 14:12:13 +08:00

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C
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#include "pocketpy/common/vector.h"
#include "pocketpy/pocketpy.h"
#include "pocketpy/common/utils.h"
#include "pocketpy/common/sstream.h"
#include "pocketpy/interpreter/vm.h"
#include <stdint.h>
typedef enum {
// clang-format off
PKL_NONE,
PKL_INT8, PKL_INT16, PKL_INT32, PKL_INT64,
PKL_FLOAT32, PKL_FLOAT64,
PKL_TRUE, PKL_FALSE,
PKL_STRING, PKL_BYTES,
PKL_BUILD_LIST,
PKL_BUILD_TUPLE,
PKL_BUILD_DICT,
PKL_VEC2, PKL_VEC3,
PKL_VEC2I, PKL_VEC3I,
PKL_TYPE,
PKL_EOF,
// clang-format on
} PickleOp;
typedef struct {
c11_vector /*T=char*/ codes;
} PickleObject;
static void PickleObject__ctor(PickleObject* self) { c11_vector__ctor(&self->codes, sizeof(char)); }
static void PickleObject__dtor(PickleObject* self) { c11_vector__dtor(&self->codes); }
static void PickleObject__py_submit(PickleObject* self, py_OutRef out) {
int size;
unsigned char* data = c11_vector__submit(&self->codes, &size);
unsigned char* out_data = py_newbytes(out, size);
memcpy(out_data, data, size);
}
static void PickleObject__write_bytes(PickleObject* buf, const void* data, int size) {
c11_vector__extend(char, &buf->codes, data, size);
}
static void pkl__emit_op(PickleObject* buf, PickleOp op) {
c11_vector__push(char, &buf->codes, op);
}
static void pkl__emit_int(PickleObject* buf, py_i64 val) {
if(val >= INT8_MIN && val <= INT8_MAX) {
pkl__emit_op(buf, PKL_INT8);
PickleObject__write_bytes(buf, &val, 1);
} else if(val >= INT16_MIN && val <= INT16_MAX) {
pkl__emit_op(buf, PKL_INT16);
PickleObject__write_bytes(buf, &val, 2);
} else if(val >= INT32_MIN && val <= INT32_MAX) {
pkl__emit_op(buf, PKL_INT32);
PickleObject__write_bytes(buf, &val, 4);
} else {
pkl__emit_op(buf, PKL_INT64);
PickleObject__write_bytes(buf, &val, 8);
}
}
#define UNALIGNED_READ(p_val, p_buf) \
do { \
memcpy((p_val), (p_buf), sizeof(*(p_val))); \
(p_buf) += sizeof(*(p_val)); \
} while(0)
static py_i64 pkl__read_int(const unsigned char** p) {
PickleOp op = (PickleOp) * *p;
(*p)++;
switch(op) {
case PKL_INT8: {
int8_t val;
UNALIGNED_READ(&val, *p);
return val;
}
case PKL_INT16: {
int16_t val;
UNALIGNED_READ(&val, *p);
return val;
}
case PKL_INT32: {
int32_t val;
UNALIGNED_READ(&val, *p);
return val;
}
case PKL_INT64: {
int64_t val;
UNALIGNED_READ(&val, *p);
return val;
}
default: c11__abort("pkl__read_int(): invalid op: %d", op);
}
}
const static char* pkl__read_cstr(const unsigned char** p) {
const char* p_str = (const char*)*p;
int length = strlen(p_str);
*p += length + 1; // include '\0'
return p_str;
}
static bool pickle_loads(int argc, py_Ref argv) {
PY_CHECK_ARGC(1);
PY_CHECK_ARG_TYPE(0, tp_bytes);
int size;
const unsigned char* data = py_tobytes(argv, &size);
return py_pickle_loads(data, size);
}
static bool pickle_dumps(int argc, py_Ref argv) {
PY_CHECK_ARGC(1);
return py_pickle_dumps(argv);
}
void pk__add_module_pickle() {
py_Ref mod = py_newmodule("pickle");
int x = 1;
bool is_little_endian = *(char*)&x == 1;
if(!is_little_endian) c11__abort("is_little_endian != true");
py_bindfunc(mod, "loads", pickle_loads);
py_bindfunc(mod, "dumps", pickle_dumps);
}
static bool pickle__write_object(PickleObject* buf, py_TValue* obj);
static bool pickle__write_array(PickleObject* buf, PickleOp op, py_TValue* arr, int length) {
for(int i = 0; i < length; i++) {
bool ok = pickle__write_object(buf, arr + i);
if(!ok) return false;
}
pkl__emit_op(buf, op);
pkl__emit_int(buf, length);
return true;
}
static bool pickle__write_dict_kv(py_Ref k, py_Ref v, void* ctx) {
PickleObject* buf = (PickleObject*)ctx;
if(!pickle__write_object(buf, k)) return false;
if(!pickle__write_object(buf, v)) return false;
return true;
}
static bool pickle__write_object(PickleObject* buf, py_TValue* obj) {
switch(obj->type) {
case tp_NoneType: {
pkl__emit_op(buf, PKL_NONE);
return true;
}
case tp_int: {
py_i64 val = obj->_i64;
pkl__emit_int(buf, val);
return true;
}
case tp_float: {
py_f64 val = obj->_f64;
float val32 = (float)val;
if(val == val32) {
pkl__emit_op(buf, PKL_FLOAT32);
PickleObject__write_bytes(buf, &val32, 4);
} else {
pkl__emit_op(buf, PKL_FLOAT64);
PickleObject__write_bytes(buf, &val, 8);
}
return true;
}
case tp_bool: {
bool val = obj->_bool;
pkl__emit_op(buf, val ? PKL_TRUE : PKL_FALSE);
return true;
}
case tp_str: {
pkl__emit_op(buf, PKL_STRING);
c11_sv sv = py_tosv(obj);
pkl__emit_int(buf, sv.size);
PickleObject__write_bytes(buf, sv.data, sv.size);
return true;
}
case tp_bytes: {
pkl__emit_op(buf, PKL_BYTES);
int size;
unsigned char* data = py_tobytes(obj, &size);
pkl__emit_int(buf, size);
PickleObject__write_bytes(buf, data, size);
return true;
}
case tp_list: {
return pickle__write_array(buf, PKL_BUILD_LIST, py_list_data(obj), py_list_len(obj));
}
case tp_tuple: {
return pickle__write_array(buf, PKL_BUILD_TUPLE, py_tuple_data(obj), py_tuple_len(obj));
}
case tp_dict: {
bool ok = py_dict_apply(obj, pickle__write_dict_kv, (void*)buf);
if(!ok) return false;
pkl__emit_op(buf, PKL_BUILD_DICT);
pkl__emit_int(buf, py_dict_len(obj));
return true;
}
case tp_vec2: {
c11_vec2 val = py_tovec2(obj);
pkl__emit_op(buf, PKL_VEC2);
PickleObject__write_bytes(buf, &val, sizeof(c11_vec2));
return true;
}
case tp_vec3: {
c11_vec3 val = py_tovec3(obj);
pkl__emit_op(buf, PKL_VEC3);
PickleObject__write_bytes(buf, &val, sizeof(c11_vec3));
return true;
}
case tp_vec2i: {
c11_vec2i val = py_tovec2i(obj);
pkl__emit_op(buf, PKL_VEC2I);
pkl__emit_int(buf, val.x);
pkl__emit_int(buf, val.y);
return true;
}
case tp_vec3i: {
c11_vec3i val = py_tovec3i(obj);
pkl__emit_op(buf, PKL_VEC3I);
pkl__emit_int(buf, val.x);
pkl__emit_int(buf, val.y);
pkl__emit_int(buf, val.z);
return true;
}
case tp_type: {
pkl__emit_op(buf, PKL_TYPE);
py_TypeInfo* ti = pk__type_info(py_totype(obj));
const char* mod_name = py_tostr(py_getdict(&ti->module, __name__));
c11_sbuf path_buf;
c11_sbuf__ctor(&path_buf);
c11_sbuf__write_cstr(&path_buf, mod_name);
c11_sbuf__write_cstr(&path_buf, "@");
c11_sbuf__write_cstr(&path_buf, py_name2str(ti->name));
c11_string* path = c11_sbuf__submit(&path_buf);
// include '\0'
PickleObject__write_bytes(buf, path->data, path->size + 1);
c11_string__delete(path);
return true;
}
default: return TypeError("'%t' object is not picklable", obj->type);
}
}
bool py_pickle_dumps(py_Ref val) {
PickleObject buf;
PickleObject__ctor(&buf);
bool ok = pickle__write_object(&buf, val);
if(!ok) {
PickleObject__dtor(&buf);
return false;
}
pkl__emit_op(&buf, PKL_EOF);
PickleObject__py_submit(&buf, py_retval());
return true;
}
bool py_pickle_loads(const unsigned char* data, int size) {
py_StackRef p0 = py_peek(0);
const unsigned char* p = data;
while(true) {
PickleOp op = (PickleOp)*p;
p++;
switch(op) {
case PKL_NONE: {
py_pushnone();
break;
}
case PKL_INT8: {
int8_t val;
UNALIGNED_READ(&val, p);
py_newint(py_pushtmp(), val);
break;
}
case PKL_INT16: {
int16_t val;
UNALIGNED_READ(&val, p);
py_newint(py_pushtmp(), val);
break;
}
case PKL_INT32: {
int32_t val;
UNALIGNED_READ(&val, p);
py_newint(py_pushtmp(), val);
break;
}
case PKL_INT64: {
int64_t val;
UNALIGNED_READ(&val, p);
py_newint(py_pushtmp(), val);
break;
}
case PKL_FLOAT32: {
float val;
UNALIGNED_READ(&val, p);
py_newfloat(py_pushtmp(), val);
break;
}
case PKL_FLOAT64: {
double val;
UNALIGNED_READ(&val, p);
py_newfloat(py_pushtmp(), val);
break;
}
case PKL_TRUE: {
py_newbool(py_pushtmp(), true);
break;
}
case PKL_FALSE: {
py_newbool(py_pushtmp(), false);
break;
}
case PKL_STRING: {
int size = pkl__read_int(&p);
char* dst = py_newstrn(py_pushtmp(), size);
memcpy(dst, p, size);
p += size;
break;
}
case PKL_BYTES: {
int size = pkl__read_int(&p);
unsigned char* dst = py_newbytes(py_pushtmp(), size);
memcpy(dst, p, size);
p += size;
break;
}
case PKL_BUILD_LIST: {
int length = pkl__read_int(&p);
py_OutRef val = py_retval();
py_newlistn(val, length);
for(int i = length - 1; i >= 0; i--) {
py_StackRef item = py_peek(-1);
py_list_setitem(val, i, item);
py_pop();
}
py_push(val);
break;
}
case PKL_BUILD_TUPLE: {
int length = pkl__read_int(&p);
py_OutRef val = py_retval();
py_newtuple(val, length);
for(int i = length - 1; i >= 0; i--) {
py_StackRef item = py_peek(-1);
py_tuple_setitem(val, i, item);
py_pop();
}
py_push(val);
break;
}
case PKL_BUILD_DICT: {
int length = pkl__read_int(&p);
py_OutRef val = py_pushtmp();
py_newdict(val);
py_StackRef begin = py_peek(-1) - 2 * length;
py_StackRef end = py_peek(-1);
for(py_StackRef i = begin; i < end; i += 2) {
py_StackRef k = i;
py_StackRef v = i + 1;
bool ok = py_dict_setitem(val, k, v);
if(!ok) return false;
}
py_assign(py_retval(), val);
py_shrink(2 * length + 1);
py_push(py_retval());
break;
}
case PKL_VEC2: {
c11_vec2 val;
UNALIGNED_READ(&val, p);
py_newvec2(py_pushtmp(), val);
break;
}
case PKL_VEC3: {
c11_vec3 val;
UNALIGNED_READ(&val, p);
py_newvec3(py_pushtmp(), val);
break;
}
case PKL_VEC2I: {
c11_vec2i val;
val.x = pkl__read_int(&p);
val.y = pkl__read_int(&p);
py_newvec2i(py_pushtmp(), val);
break;
}
case PKL_VEC3I: {
c11_vec3i val;
val.x = pkl__read_int(&p);
val.y = pkl__read_int(&p);
val.z = pkl__read_int(&p);
py_newvec3i(py_pushtmp(), val);
break;
}
case PKL_TYPE: {
const char* path = pkl__read_cstr(&p);
char* sep_index = strchr(path, '@');
assert(sep_index != NULL);
*sep_index = '\0';
const char* mod_name = path;
const char* type_name = sep_index + 1;
py_Type t = py_gettype(mod_name, py_name(type_name));
*sep_index = '@';
if(t == 0) {
return ImportError("cannot import '%s' from '%s'", type_name, mod_name);
}
py_push(py_tpobject(t));
break;
}
case PKL_EOF: {
if(py_peek(0) - p0 != 1) { return ValueError("invalid pickle data"); }
py_assign(py_retval(), p0);
py_pop();
return true;
}
default: c11__unreachable();
}
}
return true;
}
#undef UNALIGNED_READ
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