Move QuicheTextUtils out of platform.
All methods are now defined in terms of Abseil or STL, there is no need
for QuicheTextUtils to live in platform.
PiperOrigin-RevId: 370889335
Change-Id: Id75b2f7c6d694481eea17d85690ce12bca03f917
diff --git a/common/quiche_text_utils.cc b/common/quiche_text_utils.cc
new file mode 100644
index 0000000..263c97e
--- /dev/null
+++ b/common/quiche_text_utils.cc
@@ -0,0 +1,77 @@
+// Copyright 2021 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "common/quiche_text_utils.h"
+
+#include "absl/strings/escaping.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_format.h"
+
+namespace quiche {
+
+// static
+void QuicheTextUtils::Base64Encode(const uint8_t* data,
+ size_t data_len,
+ std::string* output) {
+ absl::Base64Escape(std::string(reinterpret_cast<const char*>(data), data_len),
+ output);
+ // Remove padding.
+ size_t len = output->size();
+ if (len >= 2) {
+ if ((*output)[len - 1] == '=') {
+ len--;
+ if ((*output)[len - 1] == '=') {
+ len--;
+ }
+ output->resize(len);
+ }
+ }
+}
+
+// static
+absl::optional<std::string> QuicheTextUtils::Base64Decode(
+ absl::string_view input) {
+ std::string output;
+ if (!absl::Base64Unescape(input, &output)) {
+ return absl::nullopt;
+ }
+ return output;
+}
+
+// static
+std::string QuicheTextUtils::HexDump(absl::string_view binary_data) {
+ const int kBytesPerLine = 16; // Maximum bytes dumped per line.
+ int offset = 0;
+ const char* p = binary_data.data();
+ int bytes_remaining = binary_data.size();
+ std::string output;
+ while (bytes_remaining > 0) {
+ const int line_bytes = std::min(bytes_remaining, kBytesPerLine);
+ absl::StrAppendFormat(&output, "0x%04x: ", offset);
+ for (int i = 0; i < kBytesPerLine; ++i) {
+ if (i < line_bytes) {
+ absl::StrAppendFormat(&output, "%02x",
+ static_cast<unsigned char>(p[i]));
+ } else {
+ absl::StrAppend(&output, " ");
+ }
+ if (i % 2) {
+ absl::StrAppend(&output, " ");
+ }
+ }
+ absl::StrAppend(&output, " ");
+ for (int i = 0; i < line_bytes; ++i) {
+ // Replace non-printable characters and 0x20 (space) with '.'
+ output += absl::ascii_isgraph(p[i]) ? p[i] : '.';
+ }
+
+ bytes_remaining -= line_bytes;
+ offset += line_bytes;
+ p += line_bytes;
+ absl::StrAppend(&output, "\n");
+ }
+ return output;
+}
+
+} // namespace quiche
