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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[C API] Add PyLong_FromInt64() and PyLong_ToInt64()","articleBody":"# Feature or enhancement\r\n\r\nI propose to add functions to convert \u003cstdint.h> integers to/from Python int objects:\r\n\r\n```c\r\nPyObject* PyLong_FromInt32(int32_t value);\r\nPyObject* PyLong_FromInt64(int64_t value);\r\nPyObject* PyLong_FromUInt32(uint32_t value);\r\nPyObject* PyLong_FromUInt64(uint64_t value);\r\n\r\nint PyLong_ToInt32(PyObject *obj, int32_t *value);\r\nint PyLong_ToInt64(PyObject *obj, int64_t *value);\r\nint PyLong_ToUInt32(PyObject *obj, uint32_t *value);\r\nint PyLong_ToUInt64(PyObject *obj, uint64_t *value);\r\n```\r\n\r\nNotes:\r\n\r\n* I prefer to limit the API to 4 types for now: int32/64_t and uint32/64_t. Later, we can discuss add more types, but let's start with the most common ones. (**UPDATE:** I removed 8-bit and 16-bit types.)\r\n* I prefer `UInt` to `Uint` since there are two words: Unsigned INTeger.\r\n* `To` functions don't return the result, but a status: 0 on success, -1 on error (with an exception set). It's to solve the [C API Problem #1](https://github.com/capi-workgroup/problems/issues/1): \"Ambiguous return values\". PyLong_AsLong() returns -1 on success and on error (with an exception set).\r\n\r\nRelated discussion: [Avoid C-specific Types](https://github.com/capi-workgroup/api-evolution/issues/10).\r\n\r\n\u003c!-- gh-linked-prs -->\r\n### Linked PRs\r\n* gh-120390\r\n\u003c!-- /gh-linked-prs -->\r\n","author":{"url":"https://github.com/vstinner","@type":"Person","name":"vstinner"},"datePublished":"2024-06-12T07:55:06Z","url":"https://github.com/python/cpython/issues/120389"}