cdef extern from "gsl/gsl_block_double.h":
ctypedef struct gsl_block:
size_t size
double * data
gsl_block * gsl_block_alloc(size_t n)
gsl_block * gsl_block_calloc(size_t n)
void gsl_block_free(gsl_block * b)
int gsl_block_fread(FILE * stream, gsl_block * b)
int gsl_block_fwrite(FILE * stream, gsl_block * b)
int gsl_block_fscanf(FILE * stream, gsl_block * b)
int gsl_block_fprintf(FILE * stream, gsl_block * b, char * format)
size_t gsl_block_size (gsl_block * b)
double * gsl_block_data (gsl_block * b)
cdef extern from "gsl/gsl_block_complex_double.h":
ctypedef struct gsl_block_complex:
size_t size
double * data
gsl_block_complex * gsl_block_complex_alloc(size_t n)
gsl_block_complex * gsl_block_complex_calloc(size_t n)
void gsl_block_complex_free(gsl_block_complex * b)
int gsl_block_complex_fread(FILE * stream, gsl_block_complex * b)
int gsl_block_complex_fwrite(FILE * stream, gsl_block_complex * b)
int gsl_block_complex_fscanf(FILE * stream, gsl_block_complex * b)
int gsl_block_complex_fprintf(FILE * stream, gsl_block_complex * b, char * format)
size_t gsl_block_complex_size (gsl_block_complex * b)
double * gsl_block_complex_data (gsl_block_complex * b)