balance sheet stuff, added khash hashmaps

src/balance_sheet.c

@@ -0,0 +1,79 @@
+#include <balance_sheet.h>
+
+khash_t(balance_sheet_map_m)* sheetMap = NULL;
+
+void BalanceSheet_Init() {
+    sheetMap = kh_init(balance_sheet_map_m);
+}
+
+int BalanceSheet_Insert(balance_sheet_entry_t entry) {
+    if (!sheetMap) { return -1; }
+
+    // Encapsulate key
+    key32_t key;
+    memcpy(key.bytes, entry.address, 32);
+
+    int ret;
+    khiter_t k = kh_put(balance_sheet_map_m, sheetMap, key, &ret);
+    if (k == kh_end(sheetMap)) {
+        return -1;
+    }
+
+    kh_value(sheetMap, k) = entry;
+
+    return ret;
+}
+
+bool BalanceSheet_Lookup(uint8_t* address, balance_sheet_entry_t* out) {
+    if (!address || !out) { return false; }
+    
+    key32_t key;
+    memcpy(key.bytes, address, 32);
+
+    khiter_t k = kh_get(balance_sheet_map_m, sheetMap, key);
+    if (k != kh_end(sheetMap)) {
+        balance_sheet_entry_t entry = kh_value(sheetMap, k);
+        memcpy(out, &entry, sizeof(balance_sheet_entry_t));
+        return true;
+    }
+
+    return false;
+}
+
+/* TODO */
+bool BalanceSheet_SaveToFile(const char* outPath) {
+    if (!sheetMap) { return false; }
+    return true;
+}
+
+/* TODO */
+bool BalanceSheet_LoadFromFile(const char* inPath) {
+    if (!sheetMap) { return false; }
+    return true;
+}
+
+void BalanceSheet_Print() {
+    if (!sheetMap) { return; }
+
+    // Iterate through every entry
+    khiter_t k;
+    size_t iter = 0;
+    for (k = kh_begin(sheetMap); k != kh_end(sheetMap); ++k) {
+        if (kh_exist(sheetMap, k)) {
+            key32_t key = kh_key(sheetMap, k);
+            balance_sheet_entry_t val = kh_val(sheetMap, k);
+
+            printf("Sheet entry %llu: mapkey=%02x%02x%02x%02x... address=%02x%02x%02x%02x... balance=%llu\n",
+                (unsigned long long)(iter),
+                key.bytes[0], key.bytes[1], key.bytes[2], key.bytes[3],
+                val.address[0], val.address[1], val.address[2], val.address[3],
+                (unsigned long long)(val.balance),
+                iter++);
+        }
+    }
+}
+
+void BalanceSheet_Destroy() {
+    kh_destroy(balance_sheet_map_m, sheetMap);
+    sheetMap = NULL;
+}