backend-infra-engineer: Pre-0.2.2 snapshot (2022)

src/app/core/common.cc

@@ -0,0 +1,63 @@
+#include "common.h"
+
+#include <cstdint>
+#include <string>
+
+namespace yaze {
+namespace app {
+namespace core {
+
+unsigned int SnesToPc(unsigned int addr) {
+  if (addr >= 0x808000) {
+    addr -= 0x808000;
+  }
+  unsigned int temp = (addr & 0x7FFF) + ((addr / 2) & 0xFF8000);
+  return (temp + 0x0);
+}
+
+int AddressFromBytes(uint8_t addr1, uint8_t addr2, uint8_t addr3) {
+  return (addr1 << 16) | (addr2 << 8) | addr3;
+}
+
+// hextodec has been imported from SNESDisasm to parse hex numbers
+int HexToDec(char *input, int length) {
+  int result = 0;
+  int value;
+  int ceiling = length - 1;
+  int power16 = 16;
+
+  int j = ceiling;
+
+  for (; j >= 0; j--) {
+    if (input[j] >= 'A' && input[j] <= 'F') {
+      value = input[j] - 'F';
+      value += 15;
+    } else {
+      value = input[j] - '9';
+      value += 9;
+    }
+
+    if (j == ceiling) {
+      result += value;
+      continue;
+    }
+
+    result += (value * power16);
+    power16 *= 16;
+  }
+
+  return result;
+}
+
+bool StringReplace(std::string &str, const std::string &from,
+                   const std::string &to) {
+  size_t start = str.find(from);
+  if (start == std::string::npos) return false;
+
+  str.replace(start, from.length(), to);
+  return true;
+}
+
+}  // namespace core
+}  // namespace app
+}  // namespace yaze