Differences

This shows you the differences between two versions of the page.

--- efinf:blcks2017:bitsundbytes:utf8 [2017/11/21 08:56] – created Ivo Blöchliger
+++ efinf:blcks2017:bitsundbytes:utf8 [2017/11/21 08:58] (current) – Ivo Blöchliger
@@ Line 1: / Line 1: @@
+Vervollständigen Sie folgenden Code:
+<code python utf8html.py>
+def to_utf8(n):
+    # hier die UTF8-Byte-Sequenz als String generieren
+def header():
+    return '<!DOCTYPE html><html><head><meta charset="UTF-8"/></head><body>'
+def footer():
+    return '</body></html>'
+def shownice(code, title=""):
+    utf8 = to_utf8(code);
+    res = utf8+" &nbsp; &nbsp; "+ title+" <b>Unicode</b> "+str(code)+" = "+hex(code)+ " = "+bin(code)+"  &nbsp; <b>UTF8-Codierung</b>: "
+    for i in range(len(utf8)):
+        res += str(ord(utf8[i])) + "  "
+    res += " <b>hex</b>: "
+    for i in range(len(utf8)):
+        res += hex(ord(utf8[i])) + "  "
+    res += " <b>binary</b>: "
+    for i in range(len(utf8)):
+        res += bin(ord(utf8[i])) + "  "
+    return res
+out = open("uft8test.html","w")
+out.write(header())
+out.write(shownice(0x260e,"Telefon"))
+out.write(footer())
+out.close()
+</code>
+<hidden Lösungsvorschlag>
+<code python>
+def to_utf8(n):
+    if (n<128):
+        return chr(n)
+    if (n<0x7ff):
+        b1 = 0b11000000 | (n >> 6)
+        b2 = 0b10000000 | (n & 0x3f)
+        return chr(b1)+chr(b2)
+    if (n<0xffff):
+        b1 = 0b11100000 | (n >> 12)
+        b2 = 0b10000000 | ((n>>6) & 0x3f)
+        b3 = 0b10000000 | (n & 0x3f)
+        return chr(b1)+chr(b2)+chr(b3)
+    else:
+        b1 = 0b11110000 | (n >> 18)
+        b2 = 0b10000000 | ((n>>12) & 0x3f)
+        b3 = 0b10000000 | ((n>>6) & 0x3f)
+        b4 = 0b10000000 | (n & 0x3f)
+        return chr(b1)+chr(b2)+chr(b3)+chr(b4)
+</code>
+</hidden>