C

Demonstrate the Global.AutoQBDecode property

The Global.AutoQBDecode property can be set to _TRUE_ to cause Q/B encoded string arguments passed to any Chilkat method to be automatically decoded before being used.

Note: This example requires Chilkat v10.0.0 or later.

C

#include <C_CkGlobal.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkGlobal glob;
    const char *s_cafe;
    HCkStringBuilder s1;
    const char *s_hello;
    HCkStringBuilder s2;

    //  Turn on auto Q/B decoding for all strings passed to any Chilkat method in any Chilkat class.
    glob = CkGlobal_Create();
    CkGlobal_putAutoQBDecode(glob,TRUE);

    //  ---------------------------------------------------------------------------------------------------------------------------------------------
    //  "Q" Encoding

    //  Quoted-Printable encoding is primarily used for text that is mostly ASCII with some non-ASCII characters. 
    //  It encodes these characters in a way that remains mostly readable and compatible with ASCII-only systems.

    //  How It Works with UTF-8:
    //  - ASCII characters (except special characters like `=`) are encoded as themselves.
    //  - Non-ASCII characters are represented by their UTF-8 byte values, each byte encoded as `=` followed by two hexadecimal digits. 
    //    For example, the UTF-8 character "é" (U+00E9) is encoded as `=C3=A9`.

    //  For example, consider the text "Café" encoded in UTF-8. The UTF-8 bytes for "é" are `C3 A9`, so in Quoted-Printable, it looks like this:  Caf=C3=A9

    //  The "Q" encoding has this syntax:  "=?charset?q?encoded_text?="
    //  For example: "=?UTF-8?Q?Caf=C3=A9_announcement?="

    //  ------
    //  "B" Encoding

    //  Base64 encoding is used to encode non-ASCII text, making it more suitable for text with a high density of non-ASCII characters, such as those found in non-Western European languages.

    //  For example, consider the text "こんにちは" ("Hello" in Japanese).
    //  The "B" encoded string would be "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="

    //  ------
    //  Q encoding is suitable for text that is mostly ASCII.
    //  B Encoding is best for text that is densely packed with non-us-ascii chars, such as non-Latin (Asian) languages.
    //  ---------------------------------------------------------------------------------------------------------------------------------------------

    //  You can use Chilkat's online tool at Online Binary Encoder to pre-encode your literal strings before
    //  inserting them into your source code.

    //  When using the online tool, choose either "MIME header Q Encoding" or "MIME Header B Encoding".

    //  For example:
    s_cafe = "=?utf-8?Q?Caf=C3=A9?=";
    s1 = CkStringBuilder_Create();
    CkStringBuilder_Append(s1,s_cafe);
    printf("%s\n",CkStringBuilder_getAsString(s1));
    //  Output is Café

    s_hello = "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?=";
    s2 = CkStringBuilder_Create();
    CkStringBuilder_Append(s2,s_hello);
    printf("%s\n",CkStringBuilder_getAsString(s2));
    //  Output is こんにちは


    CkGlobal_Dispose(glob);
    CkStringBuilder_Dispose(s1);
    CkStringBuilder_Dispose(s2);

    }