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- #ifndef Py_PYMACRO_H
- #define Py_PYMACRO_H
- /* Minimum value between x and y */
- #define Py_MIN(x, y) (((x) > (y)) ? (y) : (x))
- /* Maximum value between x and y */
- #define Py_MAX(x, y) (((x) > (y)) ? (x) : (y))
- /* Absolute value of the number x */
- #define Py_ABS(x) ((x) < 0 ? -(x) : (x))
- #define _Py_XSTRINGIFY(x) #x
- /* Convert the argument to a string. For example, Py_STRINGIFY(123) is replaced
- with "123" by the preprocessor. Defines are also replaced by their value.
- For example Py_STRINGIFY(__LINE__) is replaced by the line number, not
- by "__LINE__". */
- #define Py_STRINGIFY(x) _Py_XSTRINGIFY(x)
- /* Argument must be a char or an int in [-128, 127] or [0, 255]. */
- #define Py_CHARMASK(c) ((unsigned char)((c) & 0xff))
- /* Assert a build-time dependency, as an expression.
- Your compile will fail if the condition isn't true, or can't be evaluated
- by the compiler. This can be used in an expression: its value is 0.
- Example:
- #define foo_to_char(foo) \
- ((char *)(foo) \
- + Py_BUILD_ASSERT_EXPR(offsetof(struct foo, string) == 0))
- Written by Rusty Russell, public domain, http://ccodearchive.net/ */
- #define Py_BUILD_ASSERT_EXPR(cond) \
- (sizeof(char [1 - 2*!(cond)]) - 1)
- /* Get the number of elements in a visible array
- This does not work on pointers, or arrays declared as [], or function
- parameters. With correct compiler support, such usage will cause a build
- error (see Py_BUILD_ASSERT_EXPR).
- Written by Rusty Russell, public domain, http://ccodearchive.net/
- Requires at GCC 3.1+ */
- #if (defined(__GNUC__) && !defined(__STRICT_ANSI__) && \
- (((__GNUC__ == 3) && (__GNU_MINOR__ >= 1)) || (__GNUC__ >= 4)))
- /* Two gcc extensions.
- &a[0] degrades to a pointer: a different type from an array */
- #define Py_ARRAY_LENGTH(array) \
- (sizeof(array) / sizeof((array)[0]) \
- + Py_BUILD_ASSERT_EXPR(!__builtin_types_compatible_p(typeof(array), \
- typeof(&(array)[0]))))
- #else
- #define Py_ARRAY_LENGTH(array) \
- (sizeof(array) / sizeof((array)[0]))
- #endif
- /* Define macros for inline documentation. */
- #define PyDoc_VAR(name) static char name[]
- #define PyDoc_STRVAR(name,str) PyDoc_VAR(name) = PyDoc_STR(str)
- #ifdef WITH_DOC_STRINGS
- #define PyDoc_STR(str) str
- #else
- #define PyDoc_STR(str) ""
- #endif
- /* Below "a" is a power of 2. */
- /* Round down size "n" to be a multiple of "a". */
- #define _Py_SIZE_ROUND_DOWN(n, a) ((size_t)(n) & ~(size_t)((a) - 1))
- /* Round up size "n" to be a multiple of "a". */
- #define _Py_SIZE_ROUND_UP(n, a) (((size_t)(n) + \
- (size_t)((a) - 1)) & ~(size_t)((a) - 1))
- /* Round pointer "p" down to the closest "a"-aligned address <= "p". */
- #define _Py_ALIGN_DOWN(p, a) ((void *)((Py_uintptr_t)(p) & ~(Py_uintptr_t)((a) - 1)))
- /* Round pointer "p" up to the closest "a"-aligned address >= "p". */
- #define _Py_ALIGN_UP(p, a) ((void *)(((Py_uintptr_t)(p) + \
- (Py_uintptr_t)((a) - 1)) & ~(Py_uintptr_t)((a) - 1)))
- /* Check if pointer "p" is aligned to "a"-bytes boundary. */
- #define _Py_IS_ALIGNED(p, a) (!((Py_uintptr_t)(p) & (Py_uintptr_t)((a) - 1)))
- #ifdef __GNUC__
- #define Py_UNUSED(name) _unused_ ## name __attribute__((unused))
- #else
- #define Py_UNUSED(name) _unused_ ## name
- #endif
- #endif /* Py_PYMACRO_H */
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