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#include <stdio.h>
#include <stc/cstr.h>
typedef struct Viking {
cstr name;
cstr country;
} Viking;
void viking_del(Viking* vk) {
cstr_del(&vk->name);
cstr_del(&vk->country);
}
// Define Viking raw struct with hash, equals, and convertion functions between Viking and VikingRaw structs:
typedef struct VikingRaw {
const char* name;
const char* country;
} VikingRaw;
uint64_t vikingraw_hash(const VikingRaw* raw, size_t ignore) {
uint64_t hash = c_strhash(raw->name) ^ (c_strhash(raw->country) >> 15);
return hash;
}
static inline bool vikingraw_equalto(const VikingRaw* rx, const VikingRaw* ry) {
return strcmp(rx->name, ry->name) == 0 && strcmp(rx->country, ry->country) == 0;
}
static inline Viking viking_fromRaw(VikingRaw raw) { // note: parameter is by value
return c_make(Viking){cstr_from(raw.name), cstr_from(raw.country)};
}
static inline VikingRaw viking_toRaw(const Viking* vk) {
return c_make(VikingRaw){vk->name.str, vk->country.str};
}
// With this in place, we define the Viking => int hash map type:
#define i_tag vk
#define i_key Viking
#define i_val int
#define i_equ vikingraw_equalto
#define i_hash vikingraw_hash
#define i_keyraw VikingRaw
#define i_keyfrom viking_fromRaw
#define i_keyto viking_toRaw
#define i_keydel viking_del
#include <stc/cmap.h>
int main()
{
c_auto (cmap_vk, vikings) {
c_apply_pair(cmap_vk, emplace, &vikings, {
{{"Einar", "Norway"}, 20},
{{"Olaf", "Denmark"}, 24},
{{"Harald", "Iceland"}, 12},
});
VikingRaw bjorn = {"Bjorn", "Sweden"};
cmap_vk_emplace_or_assign(&vikings, bjorn, 10);
VikingRaw einar = {"Einar", "Norway"};
cmap_vk_value *e = cmap_vk_find(&vikings, einar).ref;
e->second += 3; // add 3 hp points to Einar
cmap_vk_emplace(&vikings, einar, 0).ref->second += 5; // add 5 more to Einar
c_foreach (k, cmap_vk, vikings) {
printf("%s of %s has %d hp\n", k.ref->first.name.str, k.ref->first.country.str, k.ref->second);
}
}
}
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