add random methods

include/pocketpy/pocketpy.h

@@ -747,19 +747,26 @@ PK_API bool
 /// noexcept
 PK_API int py_dict_len(py_Ref self);
 
+/************* random module *************/
+PK_API void py_newRandom(py_OutRef out);
+PK_API void py_Random_seed(py_Ref self, py_i64 seed);
+PK_API py_f64 py_Random_random(py_Ref self);
+PK_API py_f64 py_Random_uniform(py_Ref self, py_f64 a, py_f64 b);
+PK_API py_i64 py_Random_randint(py_Ref self, py_i64 a, py_i64 b);
+
 /************* vmath module *************/
-void py_newvec2(py_OutRef out, c11_vec2);
-void py_newvec3(py_OutRef out, c11_vec3);
-void py_newvec2i(py_OutRef out, c11_vec2i);
-void py_newvec3i(py_OutRef out, c11_vec3i);
-void py_newcolor32(py_OutRef out, c11_color32);
-c11_mat3x3* py_newmat3x3(py_OutRef out);
-c11_vec2 py_tovec2(py_Ref self);
-c11_vec3 py_tovec3(py_Ref self);
-c11_vec2i py_tovec2i(py_Ref self);
-c11_vec3i py_tovec3i(py_Ref self);
-c11_mat3x3* py_tomat3x3(py_Ref self);
-c11_color32 py_tocolor32(py_Ref self);
+PK_API void py_newvec2(py_OutRef out, c11_vec2);
+PK_API void py_newvec3(py_OutRef out, c11_vec3);
+PK_API void py_newvec2i(py_OutRef out, c11_vec2i);
+PK_API void py_newvec3i(py_OutRef out, c11_vec3i);
+PK_API void py_newcolor32(py_OutRef out, c11_color32);
+PK_API c11_mat3x3* py_newmat3x3(py_OutRef out);
+PK_API c11_vec2 py_tovec2(py_Ref self);
+PK_API c11_vec3 py_tovec3(py_Ref self);
+PK_API c11_vec2i py_tovec2i(py_Ref self);
+PK_API c11_vec3i py_tovec3i(py_Ref self);
+PK_API c11_mat3x3* py_tomat3x3(py_Ref self);
+PK_API c11_color32 py_tocolor32(py_Ref self);
 
 /************* Others *************/
 

src/modules/random.c

@@ -145,7 +145,7 @@ static bool Random__init__(int argc, py_Ref argv) {
         // do nothing
     } else if(argc == 2) {
         mt19937* ud = py_touserdata(py_arg(0));
-        if(!py_isnone(&argv[1])){
+        if(!py_isnone(&argv[1])) {
             PY_CHECK_ARG_TYPE(1, tp_int);
             py_i64 seed = py_toint(py_arg(1));
             mt19937__seed(ud, (uint32_t)seed);
@@ -328,4 +328,32 @@ __ERROR:
 #undef MATRIX_A
 #undef UPPER_MASK
 #undef LOWER_MASK
-#undef ADD_INST_BOUNDMETHOD
+#undef ADD_INST_BOUNDMETHOD
+
+void py_newRandom(py_OutRef out) {
+    py_Type type = py_gettype("random", py_name("Random"));
+    assert(type != 0);
+    mt19937* ud = py_newobject(out, type, 0, sizeof(mt19937));
+    mt19937__ctor(ud);
+}
+
+void py_Random_seed(py_Ref self, py_i64 seed) {
+    mt19937* ud = py_touserdata(self);
+    mt19937__seed(ud, (uint32_t)seed);
+}
+
+py_f64 py_Random_random(py_Ref self) {
+    mt19937* ud = py_touserdata(self);
+    return mt19937__random(ud);
+}
+
+py_f64 py_Random_uniform(py_Ref self, py_f64 a, py_f64 b) {
+    mt19937* ud = py_touserdata(self);
+    return mt19937__uniform(ud, a, b);
+}
+
+py_i64 py_Random_randint(py_Ref self, py_i64 a, py_i64 b) {
+    mt19937* ud = py_touserdata(self);
+    if(a > b) { c11__abort("randint(a, b): a must be less than or equal to b"); }
+    return mt19937__randint(ud, a, b);
+}