diff options
| -rw-r--r-- | contrib/epee/include/string_tools.h | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/contrib/epee/include/string_tools.h b/contrib/epee/include/string_tools.h index aba065cc7..6a063cc36 100644 --- a/contrib/epee/include/string_tools.h +++ b/contrib/epee/include/string_tools.h @@ -59,6 +59,26 @@ #pragma comment (lib, "Rpcrt4.lib") #endif +static const constexpr unsigned char isx[256] = +{ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 10, 11, 12, 13, 14, 15, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 10, 11, 12, 13, 14, 15, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, +}; + namespace epee { namespace string_tools @@ -98,30 +118,30 @@ namespace string_tools } //---------------------------------------------------------------------------- template<class CharT> - bool parse_hexstr_to_binbuff(const std::basic_string<CharT>& s, std::basic_string<CharT>& res, bool allow_partial_byte = false) + bool parse_hexstr_to_binbuff(const std::basic_string<CharT>& s, std::basic_string<CharT>& res) { res.clear(); - if (!allow_partial_byte && (s.size() & 1)) + if (s.size() & 1) return false; try { - long v = 0; - for(size_t i = 0; i < (s.size() + 1) / 2; i++) + res.resize(s.size() / 2); + unsigned char *dst = (unsigned char *)res.data(); + const unsigned char *src = (const unsigned char *)s.data(); + for(size_t i = 0; i < s.size(); i += 2) { - CharT byte_str[3]; - size_t copied = s.copy(byte_str, 2, 2 * i); - byte_str[copied] = CharT(0); - CharT* endptr; - v = strtoul(byte_str, &endptr, 16); - if (v < 0 || 0xFF < v || endptr != byte_str + copied) - { - return false; - } - res.push_back(static_cast<unsigned char>(v)); + int tmp = *src++; + tmp = isx[tmp]; + if (tmp == 0xff) return false; + int t2 = *src++; + t2 = isx[t2]; + if (t2 == 0xff) return false; + *dst++ = (tmp << 4) | t2; } return true; - }catch(...) + } + catch(...) { return false; } |