mirror of
https://github.com/pocketpy/pocketpy
synced 2025-10-26 22:40:17 +00:00
71 lines
1.9 KiB
Markdown
71 lines
1.9 KiB
Markdown
---
|
|
icon: dot
|
|
label: 'Installation'
|
|
order: 100
|
|
---
|
|
|
|
Download the `pocketpy.h` on our [GitHub Release](https://github.com/blueloveTH/pocketpy/releases) page.
|
|
And `#include` it in your project.
|
|
|
|
### Compile flags
|
|
|
|
To compile it with your project, these flags must be set:
|
|
|
|
+ `--std=c++17` flag must be set
|
|
+ Exception must be enabled
|
|
+ RTTI is not required
|
|
|
|
!!!
|
|
For maximum performance, we recommend to use `clang++` with `-O2` flag.
|
|
!!!
|
|
|
|
### Example
|
|
|
|
```cpp
|
|
#include "pocketpy.h"
|
|
|
|
using namespace pkpy;
|
|
|
|
int main(){
|
|
// Create a virtual machine
|
|
VM* vm = new VM();
|
|
|
|
// Hello world!
|
|
vm->exec("print('Hello world!')", "main.py", EXEC_MODE);
|
|
|
|
// Create a list
|
|
vm->exec("a = [1, 2, 3]", "main.py", EXEC_MODE);
|
|
|
|
// Eval the sum of the list
|
|
PyObject* result = vm->exec("sum(a)", "<eval>", EVAL_MODE);
|
|
std::cout << CAST(int, result); // 6
|
|
return 0;
|
|
}
|
|
```
|
|
|
|
### Overview
|
|
|
|
pkpy's C++ interfaces are organized in an object-oriented way.
|
|
All classes are located in `pkpy` namespace.
|
|
|
|
The most important class is the `VM` class. A `VM` instance is a python virtual machine which holds all necessary runtime states, including callstacks, modules, variables, etc.
|
|
|
|
You need to use the C++ `new` operator to create a `VM` instance.
|
|
|
|
```cpp
|
|
VM* vm = new VM();
|
|
```
|
|
|
|
The constructor can take 2 extra parameters.
|
|
|
|
#### `VM(bool use_stdio=true, bool enable_os=true)`
|
|
|
|
+ `use_stdio`, if `true`, the `print()` function outputs string to `stdout`. Error messages will be send to `stderr`; If `false`, they will be sent to an internal buffer. In the latter case, you need to read them via `read_output` manually.
|
|
+ `enable_os`, whether to enable OS-related features or not. This setting controls the availability of some priviledged modules such os `io` and `os` as well as builtin function `open`.
|
|
|
|
|
|
When you are done with the `VM` instance, you need to use the C++ `delete` operator to free the memory.
|
|
|
|
```cpp
|
|
delete vm;
|
|
``` |