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#include <gc.h>
#include <gc/cord.h>
#include <stdalign.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/param.h>
#include <err.h>
#include "../util.h"
#include "../SipHash/halfsiphash.h"
#include "functions.h"
#include "types.h"
typedef struct recursion_s {
const void *ptr;
struct recursion_s *next;
} recursion_t;
public CORD Pointer__cord(const void *x, bool colorize, const TypeInfo *type) {
auto ptr_info = type->PointerInfo;
const void *ptr = *(const void**)x;
if (!ptr) {
CORD typename = generic_as_str(NULL, false, ptr_info.pointed);
return colorize ? CORD_asprintf("\x1b[34;1m!%s\x1b[m", typename) : CORD_cat(ptr_info.sigil, typename);
}
// Check for recursive references, so if `x.foo = x`, then it prints as
// `@Foo{foo=@..1}` instead of overflowing the stack:
static recursion_t *recursion = NULL;
int32_t depth = 0;
for (recursion_t *r = recursion; r; r = r->next) {
++depth;
if (r->ptr == ptr)
return CORD_asprintf(colorize ? "\x1b[34;1m%s..%d\x1b[m" : "%s..%d", ptr_info.sigil, depth);
}
CORD pointed;
{ // Stringify with this pointer flagged as a recursive one:
recursion_t my_recursion = {.ptr=ptr, .next=recursion};
recursion = &my_recursion;
pointed = generic_as_str(ptr, colorize, ptr_info.pointed);
recursion = recursion->next;
}
return colorize ? CORD_asprintf("\x1b[34;1m%s%r\x1b[m", ptr_info.sigil, pointed) : CORD_cat(ptr_info.sigil, pointed);
}
public int32_t Pointer__compare(const void *x, const void *y, const TypeInfo *type) {
(void)type;
const void *xp = *(const void**)x, *yp = *(const void**)y;
return (xp > yp) - (xp < yp);
}
public bool Pointer__equal(const void *x, const void *y, const TypeInfo *type) {
(void)type;
const void *xp = *(const void**)x, *yp = *(const void**)y;
return xp == yp;
}
public uint32_t Pointer__hash(const void *x, const TypeInfo *type) {
(void)type;
uint32_t hash;
halfsiphash(x, sizeof(void*), SSS_HASH_VECTOR, (uint8_t*)&hash, sizeof(hash));
return hash;
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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