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#include <stdio.h>
#include <stc/cmap.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 int vikingraw_equals(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
Viking vk = {cstr_from(raw.name), cstr_from(raw.country)}; return vk;
}
static inline VikingRaw viking_toRaw(Viking* vk) {
VikingRaw raw = {vk->name.str, vk->country.str}; return raw;
}
// With this in place, we use the using_cmap_keydef() macro to define {Viking -> int} hash map type:
using_cmap_keydef(vk, Viking, int, vikingraw_equals, vikingraw_hash,
viking_del, viking_fromRaw, viking_toRaw, VikingRaw);
int main()
{
cmap_vk vikings = cmap_vk_init();
c_emplace_items(&vikings, cmap_vk, {
{ {"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_t *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);
}
cmap_vk_del(&vikings);
}
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