1 files changed, 102 insertions, 0 deletions
diff --git a/misc/examples/sortedmaps/multimap.c b/misc/examples/sortedmaps/multimap.c
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+++ b/misc/examples/sortedmaps/multimap.c
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+#define i_implement
+#include <stc/cstr.h>
+
+// Olympics multimap example
+
+struct OlympicsData { int year; const char *city, *country, *date; } ol_data[] = {
+    {2026, "Milan and Cortina d'Ampezzo", "Italy", "February 6-22"},
+    {2022, "Beijing", "China", "February 4-20"},
+    {2018, "PyeongChang", "South Korea", "February 9-25"},
+    {2014, "Sochi", "Russia", "February 7-23"},
+    {2010, "Vancouver", "Canada", "February 12-28"},
+    {2006, "Torino", "Italy", "February 10-26"},
+    {2002, "Salt Lake City", "United States", "February 8-24"},
+    {1998, "Nagano", "Japan", "February 7-22"},
+    {1994, "Lillehammer", "Norway", "February 12-27"},
+    {1992, "Albertville", "France", "February 8-23"},
+    {1988, "Calgary", "Canada", "February 13-28"},
+    {1984, "Sarajevo", "Yugoslavia", "February 8-19"},
+    {1980, "Lake Placid", "United States", "February 13-24"},
+    {1976, "Innsbruck", "Austria", "February 4-15"},
+    {1972, "Sapporo", "Japan", "February 3-13"},
+    {1968, "Grenoble", "France", "February 6-18"},
+    {1964, "Innsbruck", "Austria", "January 29-February 9"},
+    {1960, "Squaw Valley", "United States", "February 18-28"},
+    {1956, "Cortina d'Ampezzo", "Italy", "January 26 - February 5"},
+    {1952, "Oslo", "Norway", "February 14 - 25"},
+    {1948, "St. Moritz", "Switzerland", "January 30 - February 8"},
+    {1944, "canceled", "canceled", "canceled"},
+    {1940, "canceled", "canceled", "canceled"},
+    {1936, "Garmisch-Partenkirchen", "Germany", "February 6 - 16"},
+    {1932, "Lake Placid", "United States", "February 4 - 15"},
+    {1928, "St. Moritz", "Switzerland", "February 11 - 19"},
+    {1924, "Chamonix", "France", "January 25 - February 5"},
+};
+
+typedef struct { int year; cstr city, date; } OlympicLoc;
+
+int OlympicLoc_cmp(const OlympicLoc* a, const OlympicLoc* b);
+OlympicLoc OlympicLoc_clone(OlympicLoc loc);
+void OlympicLoc_drop(OlympicLoc* self);
+
+// Create a clist<OlympicLoc>, can be sorted by year.
+#define i_keyclass OlympicLoc // binds _cmp, _clone and _drop.
+#define i_tag OL
+#include <stc/clist.h>
+
+// Create a csmap<cstr, clist_OL> where key is country name
+#define i_key_str           // binds cstr_equ, cstr_hash, cstr_clone, ++
+#define i_valclass clist_OL // binds clist_OL_clone, clist_OL_drop
+#define i_tag OL
+#include <stc/csmap.h>
+
+int OlympicLoc_cmp(const OlympicLoc* a, const OlympicLoc* b) {
+    return a->year - b->year;
+}
+
+OlympicLoc OlympicLoc_clone(OlympicLoc loc) {
+    loc.city = cstr_clone(loc.city);
+    loc.date = cstr_clone(loc.date);
+    return loc;
+}
+
+void OlympicLoc_drop(OlympicLoc* self) {
+    cstr_drop(&self->city);
+    cstr_drop(&self->date);
+}
+
+
+int main(void)
+{
+    // Define the multimap with destructor defered to when block is completed.
+    csmap_OL multimap = {0};
+    const clist_OL empty = clist_OL_init();
+
+    for (size_t i = 0; i < c_arraylen(ol_data); ++i)
+    {
+        struct OlympicsData* d = &ol_data[i];
+        OlympicLoc loc = {.year = d->year,
+                            .city = cstr_from(d->city),
+                            .date = cstr_from(d->date)};
+        // Insert an empty list for each new country, and append the entry to the list.
+        // If country already exist in map, its list is returned from the insert function.
+        clist_OL* list = &csmap_OL_emplace(&multimap, d->country, empty).ref->second;
+        clist_OL_push_back(list, loc);
+    }
+
+    // Sort locations by year for each country.
+    c_foreach (country, csmap_OL, multimap)
+        clist_OL_sort(&country.ref->second);
+
+    // Print the multimap:
+    c_foreach (country, csmap_OL, multimap)
+    {
+        // Loop the locations for a country sorted by year
+        c_foreach (loc, clist_OL, country.ref->second)
+            printf("%s: %d, %s, %s\n", cstr_str(&country.ref->first),
+                                                    loc.ref->year,
+                                        cstr_str(&loc.ref->city),
+                                        cstr_str(&loc.ref->date));
+    }
+    csmap_OL_drop(&multimap);
+}