#
# Common definition
#

DEF PI2 = 1.5707963267948966
DEF PI = 3.1415926535897931

cdef extern from *:
    ctypedef char* const_char_ptr "const char*"

cdef double pi = PI
cdef extern from "math.h":
    double cos(double) nogil
    double acos(double) nogil
    double sin(double) nogil
    double sqrt(double) nogil
    double pow(double x, double y) nogil
    double atan2(double y, double x) nogil
    double tan(double) nogil
    double fabs(double) nogil

cdef extern from "stdlib.h":
    ctypedef unsigned long size_t
    void free(void *ptr) nogil
    void *realloc(void *ptr, size_t size) nogil
    void *malloc(size_t size) nogil
    void *calloc(size_t nmemb, size_t size) nogil

cdef extern from "string.h":
    void *memcpy(void *dest, void *src, size_t n) nogil
    void *memset(void *dest, int c, size_t len)