cdef extern from "stdlib.h":
    void free(void *)
    void *malloc(size_t)       
    void *calloc(size_t,size_t)
    void *realloc(void *,size_t)
    int c_abs "abs" (int)  
    int c_abs "abs" (int)
    int atoi( char *nptr)
    long atol( char *nptr)
    double atof( char *nptr)

cdef extern from "Python.h":
    ctypedef struct FILE
    FILE* PyFile_AsFile(object)
    char *fgets(char *str, int size, FILE *ifile)
    int feof(FILE *stream)
    size_t strlen(char *s)
    size_t getline(char **lineptr, size_t *n, FILE *stream)
    char *strstr(char *, char *)
    char *strchr(char *string, int c)
    int fileno(FILE *stream)

cdef extern from "string.h":
  int strcmp(char *s1, char *s2)
  int strncmp(char *s1,char *s2,size_t len)
  char *strcpy(char *dest,char *src)
  char *strncpy(char *dest,char *src, size_t len)
  char *strdup(char *)
  char *strcat(char *,char *)
  size_t strlen(char *s)
  int memcmp( void * s1, void *s2, size_t len )
  void *memcpy(void *dest, void *src, size_t n)
  void *memchr(void *s, int c, size_t n)

cdef extern from "stdint.h":
  ctypedef int int64_t
  ctypedef int int32_t
  ctypedef int uint32_t
  ctypedef int uint8_t
  ctypedef int uint64_t