From f0f340dec7821cee103ab9267ef941a917ef4dc4 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Sun, 18 Nov 2018 23:31:17 +0800
Subject: =?UTF-8?q?*=E7=9B=AE=E5=BD=95=E6=94=B9=E4=B8=BA=E5=B0=8F=E5=86=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libjin/graphics/fonts/je_decoder.cpp | 96 ++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/libjin/graphics/fonts/je_decoder.cpp

(limited to 'src/libjin/graphics/fonts/je_decoder.cpp')

diff --git a/src/libjin/graphics/fonts/je_decoder.cpp b/src/libjin/graphics/fonts/je_decoder.cpp
new file mode 100644
index 0000000..02112a0
--- /dev/null
+++ b/src/libjin/graphics/fonts/je_decoder.cpp
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <string.h>
+#include "je_decoder.h"
+
+namespace JinEngine
+{
+	namespace Graphics
+	{
+        namespace Fonts
+        {
+
+            /* utf8 byte string to unicode codepoint */
+            static const char *utf8toCodepoint(const char *p, unsigned *res) {
+                return nullptr;
+
+            }
+
+            /////////////////////////////////////////////////////////////////////////////
+            // decoders
+            /////////////////////////////////////////////////////////////////////////////
+
+            const void* Utf8::decode(const void* data, Codepoint* res) const
+            {
+                const char* p = (char*)data;
+                unsigned x, mask, shift;
+                switch (*p & 0xf0) {
+                case 0xf0:  mask = 0x07;  shift = 18;   break;
+                case 0xe0:  mask = 0x0f;  shift = 12;   break;
+                case 0xc0:
+                case 0xd0:  mask = 0x1f;  shift = 6;   break;
+                default:
+                    *res = *p;
+                    return p + 1;
+                }
+                x = (*p & mask) << shift;
+                do {
+                    if (*(++p) == '\0') {
+                        *res = x;
+                        return p;
+                    }
+                    shift -= 6;
+                    x |= (*p & 0x3f) << shift;
+                } while (shift);
+                *res = x;
+                return p + 1;
+            }
+
+            const void* Utf8::next(const void* data) const
+            {
+                const char* p = (char*)data;
+                unsigned x, mask, shift;
+                switch (*p & 0xf0) {
+                case 0xf0:  mask = 0x07;  shift = 18;   break;
+                case 0xe0:  mask = 0x0f;  shift = 12;   break;
+                case 0xc0:
+                case 0xd0:  mask = 0x1f;  shift = 6;   break;
+                default:
+                    return p + 1;
+                }
+                x = (*p & mask) << shift;
+                do {
+                    if (*(++p) == '\0') {
+                        return p;
+                    }
+                    shift -= 6;
+                    x |= (*p & 0x3f) << shift;
+                } while (shift);
+                return p + 1;
+            }
+            /*
+                const void* Utf16::decode(const void* data, Codepoint* res) const
+                {
+                    return nullptr;
+                }
+
+                const void* Utf16::next(const void* data) const
+                {
+                    return nullptr;
+                }
+            */
+            const void* Ascii::decode(const void* data, Codepoint* res) const
+            {
+                const char* p = (char*)data;
+                *res = *p;
+                return p + 1;
+            }
+
+            const void* Ascii::next(const void* data) const
+            {
+                const char* p = (char*)data;
+                return p + 1;
+            }
+
+        } // namespace Fonts
+	} // namespace Graphics
+} // namespace JinEngine
\ No newline at end of file
-- 
cgit v1.1-26-g67d0