fusee: read from emuSD, if enabled

fusee/program/source/fusee_util.cpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "fusee_util.hpp"
+
+namespace ams::nxboot {
+
+    u32 ParseHexInteger(const char *s) {
+            u32 x = 0;
+            if (s[0] == '0' && s[1] == 'x') {
+                s += 2;
+            }
+
+            while (true) {
+                const char c = *(s++);
+
+                if (c == '\x00') {
+                    return x;
+                } else {
+                    x <<= 4;
+
+                    if ('0' <= c && c <= '9') {
+                        x |= (c - '0');
+                    } else if ('a' <= c && c <= 'f') {
+                        x |= (c - 'a') + 10;
+                    } else if ('A' <= c && c <= 'F') {
+                        x |= (c - 'A') + 10;
+                    }
+                }
+            }
+        }
+
+        u32 ParseDecimalInteger(const char *s) {
+            u32 x = 0;
+            while (true) {
+                const char c = *(s++);
+
+                if (c == '\x00') {
+                    return x;
+                } else {
+                    x *= 10;
+
+                    if ('0' <= c && c <= '9') {
+                        x += c - '0';
+                    }
+                }
+            }
+        }
+
+}