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some fix

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docs/bindings.md
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@ -70,7 +70,7 @@ typedef struct MyStruct {
}MyStruct; }MyStruct;
``` ```
`p` is some kind of property of the struct, and this struct is used for storing `datasize` numbers. `p` is some kind of property of the struct, and this struct is used for storing `datasize` python objects.
Here's how you can create a `MyStruct`: Here's how you can create a `MyStruct`:
```c ```c
@ -87,20 +87,21 @@ bool MyStruct__new__(int argc, py_Ref argv) {
int p = py_toint(py_arg(1)); int p = py_toint(py_arg(1));
int datasize = py_toint(py_arg(2)); int datasize = py_toint(py_arg(2));
py_Ref default_value = py_arg(3); py_Ref default_value = py_arg(3);
// 5. Create a MyStruct instance, where `datasize` gives correspond slots to store numbers. // 5. Prepare a temporary reference for `MyStruct`.
py_StackRef res_ref = py_pushtmp(); py_StackRef res_ref = py_pushtmp();
// 6. Create a MyStruct instance, where `datasize` gives correspond slots to store numbers.
MyStruct* res = py_newobject(res_ref, cls, datasize, sizeof(MyStruct)); MyStruct* res = py_newobject(res_ref, cls, datasize, sizeof(MyStruct));
// 6. Set the values. // 7. Set the values.
res->p = p; res->p = p;
res->datasize = datasize; res->datasize = datasize;
// 7. `data` is in the head of slots, init `data` with zeros. // 8. `data` is in the head of slots, init `data` with zeros.
res->data = py_getslot(res_ref, 0); res->data = py_getslot(res_ref, 0);
for (int i = 0; i < datasize; i++) { for (int i = 0; i < datasize; i++) {
res->data[i] = *default_value; res->data[i] = *default_value;
} }
// 8. Put the created struct into the return value register. // 9. Put the created struct into the return value register.
py_assign(py_retval(), res_ref); py_assign(py_retval(), res_ref);
// 9. Pop the struct safely. // 10. Pop the struct safely.
py_pop(); py_pop();
return true; return true;
} }
@ -187,15 +188,16 @@ print(test.p) # 3
print(test[0]) # __getitem__, None print(test[0]) # __getitem__, None
test[0] = 1.3 # __setitem__, 1.3 test[0] = 1.3 # __setitem__, 1.3
test[1] = 100 # __setitem__, 100 test[1] = 100 # __setitem__, 100
test[2] = 'hello world' # __setitem__, hello world
print(test[0]) # 1.3 print(test[0]) # 1.3
print(test[1]) # 100 print(test[1]) # 100
print(test[2]) # hello world
print(test[4]) # IndexError: 4 is not a valid index in an array of length 4. print(test[4]) # IndexError: 4 is not a valid index in an array of length 4.
test.p = 100 # TypeError: readonly attribute: `p` test.p = 100 # TypeError: readonly attribute: `p`
``` ```
### Bind a function with arbitrary argument lists ### Bind a function with arbitrary argument lists
Sometimes you want a function that takes arbitrary input arguments. For example, sum several numbers in the table, Sometimes you want a function that takes arbitrary input arguments. For example, sum several numbers in the table, or make a simple `print` function.
or make a simple `print` function.
#### Sum several numbers #### Sum several numbers
Say you have 2,3,4,5,6 and put them into the `sum` function. Here's an implementation: Say you have 2,3,4,5,6 and put them into the `sum` function. Here's an implementation: