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#include <stdio.h>
#include <stc/cstr.h>
typedef struct Viking {
cstr name;
cstr country;
} Viking;
void Viking_drop(Viking* vk) {
cstr_drop(&vk->name);
cstr_drop(&vk->country);
}
// Define Viking raw struct with hash, equals, and convertion functions between Viking and RViking structs:
typedef struct RViking {
const char* name;
const char* country;
} RViking;
uint64_t RViking_hash(const RViking* raw, size_t ignore) {
uint64_t hash = c_strhash(raw->name) ^ (c_strhash(raw->country) >> 15);
return hash;
}
static inline bool RViking_eq(const RViking* rx, const RViking* ry) {
return strcmp(rx->name, ry->name) == 0 && strcmp(rx->country, ry->country) == 0;
}
static inline Viking Viking_from(RViking raw) { // note: parameter is by value
return c_make(Viking){cstr_from(raw.name), cstr_from(raw.country)};
}
static inline RViking Viking_toraw(const Viking* vk) {
return c_make(RViking){vk->name.str, vk->country.str};
}
// With this in place, we define the Viking => int hash map type:
#define i_type Vikings
#define i_key_bind Viking
#define i_keyraw RViking
#define i_val int
// i_key_bind auto-binds these functions:
// i_hash => Viking_hash
// i_eq => Viking_eq
// i_keyfrom => Viking_from // not _clone because i_keyraw is defined
// i_keyto => Viking_toraw
// i_keydrop => Viking_drop
#include <stc/cmap.h>
int main()
{
c_auto (Vikings, vikings) {
c_apply_pair(Vikings, emplace, &vikings, {
{{"Einar", "Norway"}, 20},
{{"Olaf", "Denmark"}, 24},
{{"Harald", "Iceland"}, 12},
});
RViking bjorn = {"Bjorn", "Sweden"};
Vikings_emplace_or_assign(&vikings, bjorn, 10);
RViking einar = {"Einar", "Norway"};
Vikings_value* v = Vikings_get_mut(&vikings, einar);
v->second += 3; // add 3 hp points to Einar
Vikings_emplace(&vikings, einar, 0).ref->second += 5; // add 5 more to Einar
c_forpair (viking, hp, Vikings, vikings) {
printf("%s of %s has %d hp\n", _.viking.name.str, _.viking.country.str, _.hp);
}
}
}
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