diff options
Diffstat (limited to 'Include/pymacro.h')
-rw-r--r-- | Include/pymacro.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/Include/pymacro.h b/Include/pymacro.h new file mode 100644 index 0000000..1dc0c61 --- /dev/null +++ b/Include/pymacro.h @@ -0,0 +1,55 @@ +#ifndef Py_PYMACRO_H +#define Py_PYMACRO_H + +#define Py_MIN(x, y) (((x) > (y)) ? (y) : (x)) +#define Py_MAX(x, y) (((x) > (y)) ? (x) : (y)) + +/* 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/ */ +#if defined(__GNUC__) +/* 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 + +#endif /* Py_PYMACRO_H */ |