diff options
Diffstat (limited to 'src/common/util.cpp')
| -rw-r--r-- | src/common/util.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/common/util.cpp b/src/common/util.cpp index 0fa9e8dc1..57e747837 100644 --- a/src/common/util.cpp +++ b/src/common/util.cpp @@ -30,6 +30,7 @@ #include <unistd.h> #include <cstdio> +#include <wchar.h> #ifdef __GLIBC__ #include <gnu/libc-version.h> @@ -67,6 +68,7 @@ using namespace epee; #include "memwipe.h" #include "cryptonote_config.h" #include "net/http_client.h" // epee::net_utils::... +#include "readline_buffer.h" #ifdef WIN32 #ifndef STRSAFE_NO_DEPRECATE @@ -1119,4 +1121,162 @@ std::string get_nix_version_display_string() return (boost::format(size->format) % (double(bytes) / divisor)).str(); } + void clear_screen() + { + std::cout << "\033[2K" << std::flush; // clear whole line + std::cout << "\033c" << std::flush; // clear current screen and scrollback + std::cout << "\033[2J" << std::flush; // clear current screen only, scrollback is still around + std::cout << "\033[3J" << std::flush; // does nothing, should clear current screen and scrollback + std::cout << "\033[1;1H" << std::flush; // move cursor top/left + std::cout << "\r \r" << std::flush; // erase odd chars if the ANSI codes were printed raw +#ifdef _WIN32 + COORD coord{0, 0}; + CONSOLE_SCREEN_BUFFER_INFO csbi; + HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE); + if (GetConsoleScreenBufferInfo(h, &csbi)) + { + DWORD cbConSize = csbi.dwSize.X * csbi.dwSize.Y, w; + FillConsoleOutputCharacter(h, (TCHAR)' ', cbConSize, coord, &w); + if (GetConsoleScreenBufferInfo(h, &csbi)) + FillConsoleOutputAttribute(h, csbi.wAttributes, cbConSize, coord, &w); + SetConsoleCursorPosition(h, coord); + } +#endif + } + + std::pair<std::string, size_t> get_string_prefix_by_width(const std::string &s, size_t columns) + { + std::string sc = ""; + size_t avail = s.size(); + const char *ptr = s.data(); + wint_t cp = 0; + int bytes = 1; + size_t sw = 0; + char wbuf[8], *wptr; + while (avail--) + { + if ((*ptr & 0x80) == 0) + { + cp = *ptr++; + bytes = 1; + } + else if ((*ptr & 0xe0) == 0xc0) + { + if (avail < 1) + { + MERROR("Invalid UTF-8"); + return std::make_pair(s, s.size()); + } + cp = (*ptr++ & 0x1f) << 6; + cp |= *ptr++ & 0x3f; + --avail; + bytes = 2; + } + else if ((*ptr & 0xf0) == 0xe0) + { + if (avail < 2) + { + MERROR("Invalid UTF-8"); + return std::make_pair(s, s.size()); + } + cp = (*ptr++ & 0xf) << 12; + cp |= (*ptr++ & 0x3f) << 6; + cp |= *ptr++ & 0x3f; + avail -= 2; + bytes = 3; + } + else if ((*ptr & 0xf8) == 0xf0) + { + if (avail < 3) + { + MERROR("Invalid UTF-8"); + return std::make_pair(s, s.size()); + } + cp = (*ptr++ & 0x7) << 18; + cp |= (*ptr++ & 0x3f) << 12; + cp |= (*ptr++ & 0x3f) << 6; + cp |= *ptr++ & 0x3f; + avail -= 3; + bytes = 4; + } + else + { + MERROR("Invalid UTF-8"); + return std::make_pair(s, s.size()); + } + + wptr = wbuf; + switch (bytes) + { + case 1: *wptr++ = cp; break; + case 2: *wptr++ = 0xc0 | (cp >> 6); *wptr++ = 0x80 | (cp & 0x3f); break; + case 3: *wptr++ = 0xe0 | (cp >> 12); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break; + case 4: *wptr++ = 0xf0 | (cp >> 18); *wptr++ = 0x80 | ((cp >> 12) & 0x3f); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break; + default: MERROR("Invalid UTF-8"); return std::make_pair(s, s.size()); + } + *wptr = 0; + sc += std::string(wbuf, bytes); +#ifdef _WIN32 + int cpw = 1; // Guess who does not implement wcwidth +#else + int cpw = wcwidth(cp); +#endif + if (cpw > 0) + { + if (cpw > (int)columns) + break; + columns -= cpw; + sw += cpw; + } + cp = 0; + bytes = 1; + } + return std::make_pair(sc, sw); + } + + size_t get_string_width(const std::string &s) + { + return get_string_prefix_by_width(s, 999999999).second; + }; + + std::vector<std::pair<std::string, size_t>> split_string_by_width(const std::string &s, size_t columns) + { + std::vector<std::string> words; + std::vector<std::pair<std::string, size_t>> lines; + boost::split(words, s, boost::is_any_of(" "), boost::token_compress_on); + // split large "words" + for (size_t i = 0; i < words.size(); ++i) + { + for (;;) + { + std::string prefix = get_string_prefix_by_width(words[i], columns).first; + if (prefix == words[i]) + break; + words[i] = words[i].substr(prefix.size()); + words.insert(words.begin() + i, prefix); + } + } + + lines.push_back(std::make_pair("", 0)); + while (!words.empty()) + { + const size_t word_len = get_string_width(words.front()); + size_t line_len = get_string_width(lines.back().first); + if (line_len > 0 && line_len + 1 + word_len > columns) + { + lines.push_back(std::make_pair("", 0)); + line_len = 0; + } + if (line_len > 0) + { + lines.back().first += " "; + lines.back().second++; + } + lines.back().first += words.front(); + lines.back().second += word_len; + words.erase(words.begin()); + } + return lines; + } + } |