radare2/libr/util/flist.c

/* radare - LGPL - Copyright 2010-2013 - pancake */
// XXX. this is dupped inside the r_flist.h for optimizations

int r_flist_iterator(void **x) {
	return *x!=0;
}
void** r_flist_next(void **x) {
	return x;
}
void** r_flist_get(void **x) {
	return *(x++);
}
// XXX: forced free?? We need RFlist struct here
#include <r_types.h>
//#include <r_flist.h>
// NOTE: reimplemnetation of r_flist in C (if no R_API defined)

#if 1
#define r_flist_t void**
#define RFList void**
#define r_flist_rewind(it) for (; (it)!=*(it); (it)--) {} (it)++
#define r_flist_next(it) *(it)!=0
#define r_flist_get(it) *((it)++)
#define r_flist_iterator(x) x
#define r_flist_unref(x) x
#endif

R_API void **r_flist_new(int n) {
	void **it;
	if (!(it = (void **)calloc (n + 2, sizeof (void*)))) {
		return NULL;
	}
	*it = it;
	memset (++it, 0, (n+1) * sizeof (void*));
	return it;
}

// XXX. this is wrong :?
R_API void **r_flist_resize(void **it, int n) {
	r_flist_rewind (it);
	it--;
	it = realloc (it, ((n+2) * sizeof (void*)));
	*it = it;
	return it+1;
}

R_API void **r_flist_prev(void **it) {
	void **p = it--;
	return (it==*it)?p:it;
}

R_API void r_flist_set(void **it, int idx, void *data) {
	r_flist_rewind (it);
	it[idx] = data;
}

R_API void r_flist_delete(void **it, int idx) {
	r_flist_rewind (it);
	free (it[idx]);
	it[idx] = NULL;
	for (it += idx; *it; it++) {
		*it = *(it + 1);
	}
}

#define r_flist_foreach(it, pos) \
	r_flist_rewind(it); \
	while (r_flist_next (it) && ((pos) = r_flist_get (it)))

R_API void r_flist_free(void **it) {
	void *pos;
	r_flist_foreach (it, pos)
		free (pos);
	r_flist_rewind (it);
	free (--it);
}

R_API int r_flist_length (void **it) {
	void *pos;
	int len = 0;
	r_flist_foreach (it, pos)
		len++;
	return len;
}