Coverage Report

Created: 2021-05-04 09:02

/src/botan/src/lib/utils/charset.cpp
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Source
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/*
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* Character Set Handling
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* (C) 1999-2007,2021 Jack Lloyd
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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#include <botan/internal/charset.h>
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#include <botan/internal/loadstor.h>
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#include <botan/exceptn.h>
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namespace Botan {
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namespace {
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void append_utf8_for(std::string& s, uint32_t c)
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125k
   {
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125k
   if(c >= 0xD800 && c < 0xE000)
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287
      throw Decoding_Error("Invalid Unicode character");
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125k
   if(c <= 0x7F)
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65.5k
      {
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65.5k
      const uint8_t b0 = static_cast<uint8_t>(c);
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65.5k
      s.push_back(static_cast<char>(b0));
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65.5k
      }
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59.6k
   else if(c <= 0x7FF)
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40.8k
      {
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40.8k
      const uint8_t b0 = 0xC0 | static_cast<uint8_t>(c >> 6);
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40.8k
      const uint8_t b1 = 0x80 | static_cast<uint8_t>(c & 0x3F);
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40.8k
      s.push_back(static_cast<char>(b0));
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40.8k
      s.push_back(static_cast<char>(b1));
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40.8k
      }
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18.7k
   else if(c <= 0xFFFF)
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17.0k
      {
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17.0k
      const uint8_t b0 = 0xE0 | static_cast<uint8_t>(c >> 12);
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17.0k
      const uint8_t b1 = 0x80 | static_cast<uint8_t>((c >> 6) & 0x3F);
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17.0k
      const uint8_t b2 = 0x80 | static_cast<uint8_t>(c & 0x3F);
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17.0k
      s.push_back(static_cast<char>(b0));
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17.0k
      s.push_back(static_cast<char>(b1));
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17.0k
      s.push_back(static_cast<char>(b2));
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17.0k
      }
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1.73k
   else if(c <= 0x10FFFF)
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1.17k
      {
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1.17k
      const uint8_t b0 = 0xF0 | static_cast<uint8_t>(c >> 18);
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1.17k
      const uint8_t b1 = 0x80 | static_cast<uint8_t>((c >> 12) & 0x3F);
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1.17k
      const uint8_t b2 = 0x80 | static_cast<uint8_t>((c >> 6) & 0x3F);
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1.17k
      const uint8_t b3 = 0x80 | static_cast<uint8_t>(c & 0x3F);
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1.17k
      s.push_back(static_cast<char>(b0));
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1.17k
      s.push_back(static_cast<char>(b1));
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1.17k
      s.push_back(static_cast<char>(b2));
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1.17k
      s.push_back(static_cast<char>(b3));
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1.17k
      }
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568
   else
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568
      throw Decoding_Error("Invalid Unicode character");
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125k
   }
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}
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std::string ucs2_to_utf8(const uint8_t ucs2[], size_t len)
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5.14k
   {
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5.14k
   if(len % 2 != 0)
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226
      throw Decoding_Error("Invalid length for UCS-2 string");
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4.92k
   const size_t chars = len / 2;
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4.92k
   std::string s;
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28.9k
   for(size_t i = 0; i != chars; ++i)
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24.0k
      {
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24.0k
      const uint32_t c = load_be<uint16_t>(ucs2, i);
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24.0k
      append_utf8_for(s, c);
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24.0k
      }
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4.92k
   return s;
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4.92k
   }
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std::string ucs4_to_utf8(const uint8_t ucs4[], size_t len)
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2.88k
   {
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2.88k
   if(len % 4 != 0)
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235
      throw Decoding_Error("Invalid length for UCS-4 string");
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2.65k
   const size_t chars = len / 4;
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2.65k
   std::string s;
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4.93k
   for(size_t i = 0; i != chars; ++i)
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2.28k
      {
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2.28k
      const uint32_t c = load_be<uint32_t>(ucs4, i);
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2.28k
      append_utf8_for(s, c);
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2.28k
      }
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2.65k
   return s;
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2.65k
   }
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/*
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* Convert from ISO 8859-1 to UTF-8
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*/
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std::string latin1_to_utf8(const uint8_t chars[], size_t len)
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5.52k
   {
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5.52k
   std::string s;
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104k
   for(size_t i = 0; i != len; ++i)
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99.1k
      {
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99.1k
      const uint32_t c = static_cast<uint8_t>(chars[i]);
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99.1k
      append_utf8_for(s, c);
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99.1k
      }
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5.52k
   return s;
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5.52k
   }
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}
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