I am reading a binary data format which contains a length field of type unsigned long long using cython.
我正在阅读二进制数据格式，其中包含使用cython的unsigned long long类型的长度字段。
After reading this value, I cast it to a Py_ssize_t variable to return to python space to be used in indexing.
读取此值后，我将其转换为Py_ssize_t变量以返回到用于索引的python空间。
Since Py_ssize_t is signed, it's maximum positive range must be lower than the maximum value unsigned long long.
由于Py_ssize_t是有符号的，因此它的最大正范围必须低于无符号long long的最大值。
Is there a general way of checking if the value I read can be stored in Py_ssize_t? Or put differently: Is there a way to obtain the maximum positive value of Py_ssize_t?
是否有一般检查我读取的值是否可以存储在Py_ssize_t中？或者换一种说法：有没有办法获得Py_ssize_t的最大正值？
1 个解决方案
#1
1
You can compare to sys.maxsize which is the maximum value Py_ssize_t can take (taken from this answer)
您可以与sys.maxsize进行比较，这是Py_ssize_t可以采用的最大值（取自此答案）
#1
1
You can compare to sys.maxsize which is the maximum value Py_ssize_t can take (taken from this answer)
您可以与sys.maxsize进行比较，这是Py_ssize_t可以采用的最大值（取自此答案）