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87 lines
2.8 KiB
87 lines
2.8 KiB
4 months ago
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#include "xmpmeta/base64.h"
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#include "android-base/logging.h"
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#include "strings/escaping.h"
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namespace dynamic_depth {
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namespace xmpmeta {
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namespace {
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bool EncodeBase64RawData(const uint8* data, size_t data_size, string* output) {
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// Disable linting because string_view doesn't appear to support uint8_t.
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dynamic_depth::Base64Escape(data, data_size, output, false); // NOLINT
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return output->length() > 0;
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}
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template <typename T>
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bool InternalEncodeArrayBase64(const std::vector<T>& data, string* output) {
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size_t buffer_size = data.size() * sizeof(T);
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return EncodeBase64RawData(reinterpret_cast<const uint8_t*>(data.data()),
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buffer_size, output);
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}
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template <typename T>
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bool InternalDecodeArrayBase64(const string& data, std::vector<T>* output) {
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string bytes;
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if (!DecodeBase64(data, &bytes)) {
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return false;
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}
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const int count = bytes.size() / sizeof(T);
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output->clear();
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output->resize(count);
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memcpy(output->data(), bytes.data(), output->size() * sizeof(T));
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return !output->empty();
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}
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} // namespace
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// Decodes the base64-encoded input range.
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bool DecodeBase64(const string& data, string* output) {
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// Support decoding of both web-safe and regular base64.
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// "Web-safe" base-64 replaces + with - and / with _, and omits
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// trailing = padding characters.
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if (dynamic_depth::Base64Unescape(data, output)) {
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return true;
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}
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return dynamic_depth::WebSafeBase64Unescape(data, output);
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}
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// Base64-encodes the given data.
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bool EncodeBase64(const string& data, string* output) {
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return EncodeBase64RawData(reinterpret_cast<const uint8*>(data.c_str()),
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data.length(), output);
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}
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// Base64-encodes the given int array.
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bool EncodeIntArrayBase64(const std::vector<int32_t>& data, string* output) {
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return InternalEncodeArrayBase64<int32_t>(data, output);
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}
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// Base64-decodes the given base64-encoded string.
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bool DecodeIntArrayBase64(const string& data, std::vector<int32_t>* output) {
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return InternalDecodeArrayBase64<int32_t>(data, output);
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}
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// Base64-encodes the given float array.
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bool EncodeFloatArrayBase64(const std::vector<float>& data, string* output) {
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return InternalEncodeArrayBase64<float>(data, output);
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}
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// Base64-decodes the given base64-encoded string.
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bool DecodeFloatArrayBase64(const string& data, std::vector<float>* output) {
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return InternalDecodeArrayBase64<float>(data, output);
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}
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// Base64-encodes the given double array.
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bool EncodeDoubleArrayBase64(const std::vector<double>& data, string* output) {
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return InternalEncodeArrayBase64<double>(data, output);
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}
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// Base64-decodes the given base64-encoded string.
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bool DecodeDoubleArrayBase64(const string& data, std::vector<double>* output) {
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return InternalDecodeArrayBase64<double>(data, output);
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}
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} // namespace xmpmeta
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} // namespace dynamic_depth
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