diff options
| -rw-r--r-- | CMakeLists.txt | 1 | ||||
| -rw-r--r-- | goo/gbase64.cc | 50 | ||||
| -rw-r--r-- | goo/gbase64.h | 28 |
3 files changed, 79 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 74294ca8..bf187ab4 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -314,6 +314,7 @@ configure_file(config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h) configure_file(poppler/poppler-config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/poppler/poppler-config.h) set(poppler_SRCS + goo/gbase64.cc goo/gbasename.cc goo/gfile.cc goo/GooTimer.cc diff --git a/goo/gbase64.cc b/goo/gbase64.cc new file mode 100644 index 00000000..e0da77ff --- /dev/null +++ b/goo/gbase64.cc @@ -0,0 +1,50 @@ +//======================================================================== +// +// gbase64.cc +// +// Implementation of a base64 encoder, because another one did not immediately +// avail itself. +// +// This file is licensed under the GPLv2 or later +// +// Copyright (C) 2018 Greg Knight <lyngvi@gmail.com> +// +//======================================================================== + +#include "gbase64.h" +#include <sstream> + +static void b64encodeTriplet(char output[4], unsigned char a, unsigned char b, unsigned char c) +{ + static const char* base64table = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + output[0] = base64table[((a >> 2) & 0x3f) ]; // upper 6 of first byte + output[1] = base64table[((a << 4) & 0x30) | ((b >> 4) & 0x0f)]; // lower 2 of first byte, upper 4 of second byte + output[2] = base64table[((b << 2) & 0x3c) | ((c >> 6) & 0x03)]; // lower 4 of second byte, upper 2 of third byte + output[3] = base64table[((c ) & 0x3f)]; // lower 6 of third byte +} + +std::string gbase64Encode(const void* input, size_t len) +{ + char quad[4]; + size_t pos = 0; + std::stringstream buf; + auto bytes = static_cast<const unsigned char*>(input); + for ( ; pos + 3 <= len; pos += 3) { + b64encodeTriplet(quad, bytes[0], bytes[1], bytes[2]); + buf.write(&quad[0], 4); + bytes += 3; + } + switch (len - pos) { + case 1: + b64encodeTriplet(quad, bytes[0], 0, 0); + quad[2] = quad[3] = '='; + buf.write(&quad[0], 4); + break; + case 2: + b64encodeTriplet(quad, bytes[0], bytes[1], 0); + quad[3] = '='; + buf.write(&quad[0], 4); + break; + } + return buf.str(); +} diff --git a/goo/gbase64.h b/goo/gbase64.h new file mode 100644 index 00000000..06e2e8b6 --- /dev/null +++ b/goo/gbase64.h @@ -0,0 +1,28 @@ +//======================================================================== +// +// gbase64.h +// +// Implementation of a base64 encoder, because another one did not immediately +// avail itself. +// +// This file is licensed under the GPLv2 or later +// +// Copyright (C) 2018 Greg Knight <lyngvi@gmail.com> +// +//======================================================================== + +#ifndef GOO_GBASE64_H +#define GOO_GBASE64_H + +#include <string> +#include <vector> + +std::string gbase64Encode(const void* input, size_t sz); + +inline std::string gbase64Encode(const std::vector<char>& input) + { return input.empty() ? std::string() : gbase64Encode(&input[0], input.size()); } + +inline std::string gbase64Encode(const std::vector<unsigned char>& input) + { return input.empty() ? std::string() : gbase64Encode(&input[0], input.size()); } + +#endif // ndef GOO_GBASE64_H |