yenc.qh

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#pragma once
 
#include "test.qh"
 
#define yenc_single(c, ret) MACRO_BEGIN \
    int conv = c; \
    conv += 42; \
    if (conv >= 256) \
        conv -= 256; \
    switch (conv) \
    { \
        default: \
        { \
            string yenc_it = chr2str(conv); \
            ret = yenc_it; \
            break; \
        } \
        case 0: \
        case '\n': \
        case '\r': \
        case '=': \
        { \
            conv += 64; \
            string yenc_it = chr2str('=', conv); \
            ret = yenc_it; \
            break; \
        } \
    } \
MACRO_END
 
#define ydec_single(stringiter, ret) MACRO_BEGIN \
    int conv = STRING_ITERATOR_GET(stringiter); \
    if (conv <= 0) \
        ret = -1; \
    else \
    { \
        if (conv == '=') \
        { \
            conv = STRING_ITERATOR_GET(stringiter); \
            conv -= 64; \
        } \
        if (conv < 42) \
            conv += 256; \
        conv -= 42; \
        ret = conv; \
    } \
MACRO_END
 
TEST(yEnc, EncodeDecode)
{
    for (int i = 0; i <= 255; ++i)
    {
        int expect = i;
 
        string fragment = string_null;
        yenc_single(expect, fragment);
 
        int encdec = 0;
        STRING_ITERATOR(fragmentiterator, fragment, 0);
        ydec_single(fragmentiterator, encdec);
 
        EXPECT_EQ(expect, encdec);
    }
    SUCCEED();
}