Neater method of creating a linked list

[Ross Clement (Email address invalid - do not use)]

Hi. I would like to make a typedef for a structure which can be joined
up into a linked list. I include my code below. My code works, but I
have a vague suspicion that I could have declared my "spectrum" type in
a neater way. Is there a better way of doing the following?

Thanks in anticipation,

Ross-c

#include <stdlib.h>

typedef struct spectrum spectrum;

struct spectrum
{
double *magnitude;
double *phase;
int n;

double phaseNormalisat ion;
double magnitudeNormal isation;

spectrum *next;
};

spectrum *spectrum_make( double *data[], int N );
void spectrum_free( spectrum *s );

[Ingo Menger]

Ross Clement (Email address invalid - do not use) schrieb:

Hi. I would like to make a typedef for a structure which can be joined
up into a linked list. I include my code below. My code works, but I
have a vague suspicion that I could have declared my "spectrum" type in
a neater way. Is there a better way of doing the following?

Yes.
It might be a good idea to write code for linked lists as such. Most
functions on lists work for list of spectrums as well as for list of
characters or list of luxury cars. One example would be reverse(),
another append(), that appends one list to another list. Others do need
helper functions, for example sort(), filter() or map().

Alternatively, switch to C++ and use some library, such as the STL,
where container data types are already available in all sizes and
shapes.

[Richard Harnden]

Ross Clement (Email address invalid - do not use) wrote:

Hi. I would like to make a typedef for a structure which can be joined
up into a linked list. I include my code below. My code works, but I
have a vague suspicion that I could have declared my "spectrum" type in
a neater way. Is there a better way of doing the following?

Thanks in anticipation,

Ross-c

#include <stdlib.h>

typedef struct spectrum spectrum;

struct spectrum
{
double *magnitude;
double *phase;
int n;

double phaseNormalisat ion;
double magnitudeNormal isation;

spectrum *next;
};

spectrum *spectrum_make( double *data[], int N );
void spectrum_free( spectrum *s );

Seperate the linked-list from the spectrum parts, ie

struct spectrum
{
double *magnitude;
double *phase;
int n;
double phaseNormalisat ion;
double magnitudeNormal isation;
};

struct list
{
void *payload;
struct list *next;
};

typedef void (*free_payload) (void *p);

struct list_info
{
free_payload free_fn;
struct list *first;
};