pf2: skeleton str api

libraries/libvapours/source/prfile2/prfile2_wide_string.cpp

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2018-2020 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/>.
+ */
+#if defined(ATMOSPHERE_IS_STRATOSPHERE)
+#include <stratosphere.hpp>
+#elif defined(ATMOSPHERE_IS_MESOSPHERE)
+#include <mesosphere.hpp>
+#elif defined(ATMOSPHERE_IS_EXOSPHERE)
+#include <exosphere.hpp>
+#else
+#include <vapours.hpp>
+#endif
+
+namespace ams::prfile2 {
+
+    size_t w_strlen(const WideChar *s) {
+        const WideChar *cur;
+        for (cur = s; *cur != 0; ++cur) {
+            /* ... */
+        }
+        return cur - s;
+    }
+
+    size_t w_strnlen(const WideChar *s, size_t length) {
+        const WideChar *cur;
+        for (cur = s; *cur != 0 && length != 0; ++cur, --length) {
+            /* ... */
+        }
+        return cur - s;
+    }
+
+    WideChar *w_strcpy(WideChar *dst, const WideChar *src) {
+        WideChar * const ret = dst;
+        while (true) {
+            const auto c = *(src++);
+            *(dst++) = c;
+
+            if (c == 0) {
+                break;
+            }
+        }
+        return ret;
+    }
+
+    WideChar *w_strncpy(WideChar *dst, const WideChar *src, size_t length) {
+        WideChar * const ret = dst;
+        while (length > 1) {
+            const auto c = *(src++);
+            *(dst++) = c;
+
+            if (c == 0) {
+                return ret;
+            }
+        }
+
+        if (length == 1) {
+            *(dst++) = 0;
+        }
+
+        return ret;
+    }
+
+    int w_strcmp(const WideChar *lhs, const WideChar *rhs) {
+        WideChar l, r;
+        while (true) {
+            l = *(lhs++);
+            r = *(rhs++);
+            if (l == 0 || r == 0 || l != r) {
+                break;
+            }
+        }
+
+        return l - r;
+    }
+
+    int w_strncmp(const WideChar *lhs, const WideChar *rhs, size_t length) {
+        if (length == 0) {
+            return 0;
+        }
+
+        WideChar l, r;
+        while (true) {
+            l = *(lhs++);
+            r = *(rhs++);
+            if (l == 0 || r == 0 || l != r) {
+                break;
+            }
+
+            if ((--length) == 0) {
+                return 0;
+            }
+        }
+
+        return l - r;
+    }
+
+}