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Debugger: Add API to read/write chunks of memory.

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Using base64 at this point to keep JSON.
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2020-12-28 10:30:58 -08:00
parent f19d957c42
commit 7e5052bc9e
4 changed files with 132 additions and 0 deletions
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Common/Data/Encoding/Base64.cpp
+45
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@@ -33,3 +33,48 @@ std::string Base64Encode(const uint8_t *p, size_t sz) {
return result;
}
std::vector<uint8_t> Base64Decode(const char *s, size_t sz) {
const uint8_t lookup[256] = {
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 63, 62, 255, 63,
// '0' starts here.
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
// 'A' after an invalid.
255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 63,
// 'a' after an invalid.
255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255,
};
std::vector<uint8_t> result;
result.reserve(3 * sz / 4);
for (size_t i = 0; i < sz; i += 4) {
uint8_t quad[4] = {
lookup[s[i]],
i + 1 < sz ? lookup[s[i + 1]] : 255,
i + 2 < sz ? lookup[s[i + 2]] : 255,
i + 3 < sz ? lookup[s[i + 3]] : 255,
};
// First: ABCDEF GHXXXX XXXXXX XXXXXX. Neither 6-bit value should be invalid.
result.push_back((quad[0] << 2) | ((quad[1] & 0x30) >> 4));
// Next: XXXXXX XXABCD EFGHXX XXXXXX. Invalid if quad[2] is invalid.
if (quad[2] == 255) {
continue;
}
result.push_back(((quad[1] & 0x0F) << 4) | ((quad[2] & 0x3C) >> 2));
// Last: XXXXXX XXXXXX XXXXAB CDEFGH. Invalid only if quad[3] is.
if (quad[3] == 255) {
continue;
}
result.push_back(((quad[2] & 0x03) << 6) | (quad[3] & 0x3F));
}
return result;
}