src/FbTk/FbString.cc (raw)
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// FbString.cc for fluxbox // Copyright (c) 2006 Henrik Kinnunen (fluxgen at fluxbox dot org) // Copyright (c) 2006 Simon Bowden (rathnor at fluxbox dot org) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. #include "FbString.hh" #ifdef HAVE_CERRNO #include <cerrno> #else #include <errno.h> #endif #ifdef HAVE_CSTRING #include <cstring> #else #include <string.h> #endif #ifdef HAVE_CSTDLIB #include <cstdlib> #else #include <stdlib.h> #endif #ifdef HAVE_CSTDIO #include <cstdio> #else #include <stdio.h> #endif #include <langinfo.h> #include <locale.h> #include <iostream> #include <vector> #ifndef HAVE_ICONV typedef int iconv_t; #endif // HAVE_ICONV #ifdef HAVE_FRIBIDI #include <fribidi.h> #endif #ifdef DEBUG using std::cerr; using std::endl; #endif // DEBUG namespace { const iconv_t ICONV_NULL = (iconv_t)(-1); #ifdef HAVE_FRIBIDI FbTk::FbString makeVisualFromLogical(const FbTk::FbString& src) { FriBidiCharType base = FRIBIDI_TYPE_N; // reuse allocated memory for reencoding / reordering static std::vector<FriBidiChar> us; static std::vector<FriBidiChar> out_us; static FbTk::FbString result; const size_t S = src.size() + 1; const size_t S4 = S * 4; if (us.capacity() < S) us.reserve(S); if (out_us.capacity() < S) out_us.reserve(S); if (result.capacity() < S4) result.reserve(S4); us.resize(S); FriBidiStrIndex len = fribidi_charset_to_unicode(FRIBIDI_CHAR_SET_UTF8, const_cast<char*>(src.c_str()), S - 1, &us[0]); out_us.resize(S); fribidi_log2vis(&us[0], len, &base, &out_us[0], NULL, NULL, NULL); result.resize(S4); len = fribidi_unicode_to_charset(FRIBIDI_CHAR_SET_UTF8, &out_us[0], len, &result[0]); result.resize(len); // trim to currently used chars return result; } #endif } // end of anonymous namespace namespace FbTk { BiDiString::BiDiString(const FbString& logical) #ifdef HAVE_FRIBIDI : m_visual_dirty(false) #endif { if (!logical.empty()) setLogical(logical); } const FbString& BiDiString::setLogical(const FbString& logical) { m_logical = logical; #if HAVE_FRIBIDI if (m_logical.empty()) { m_visual_dirty = false; m_visual.clear(); } else { m_visual_dirty = true; } #endif return m_logical; } const FbString& BiDiString::visual() const { #if HAVE_FRIBIDI if (m_visual_dirty) { m_visual = ::makeVisualFromLogical(logical()); } m_visual_dirty = false; return m_visual; #else return m_logical; #endif } namespace FbStringUtil { enum ConvType { FB2X = 0, X2FB, LOCALE2FB, FB2LOCALE, CONVSIZE }; static bool s_inited = false; static iconv_t s_iconv_convs[CONVSIZE]; static std::string s_locale_codeset; /// Initialise all of the iconv conversion descriptors void init() { if (s_inited) return; s_inited = true; setlocale(LC_CTYPE, ""); for (int i = 0; i < CONVSIZE; i++) { s_iconv_convs[i] = ICONV_NULL; } #ifdef HAVE_ICONV #if defined(CODESET) && !defined(_WIN32) s_locale_codeset = nl_langinfo(CODESET); #else // openbsd doesnt have this (yet?) std::string locale = setlocale(LC_CTYPE, NULL); size_t pos = locale.find('.'); if (pos != std::string::npos) s_locale_codeset = locale.substr(pos+1); #endif // CODESET #ifdef DEBUG cerr << "FbTk::FbString: setup converts for local codeset = " << s_locale_codeset << endl; #endif // DEBUG s_iconv_convs[FB2X] = iconv_open("ISO8859-1", "UTF-8"); s_iconv_convs[X2FB] = iconv_open("UTF-8", "ISO8859-1"); s_iconv_convs[FB2LOCALE] = iconv_open(s_locale_codeset.c_str(), "UTF-8"); s_iconv_convs[LOCALE2FB] = iconv_open("UTF-8", s_locale_codeset.c_str()); #endif // HAVE_ICONV } void shutdown() { #ifdef HAVE_ICONV int i; for (i = 0; i < CONVSIZE; ++i) { if (s_iconv_convs[i] != ICONV_NULL) { iconv_close(s_iconv_convs[i]); s_iconv_convs[i] = ICONV_NULL; } } s_inited = false; #endif // HAVE_ICONV } /** Recodes the text from one encoding to another assuming cd is correct @param cd the iconv type @param msg text to be converted, **NOT** necessarily NULL terminated @param size number of BYTES to convert @return the recoded string, or 0 on failure */ std::string recode(iconv_t cd, const std::string &in) { #ifdef HAVE_ICONV /** --NOTE-- In the "C" locale, this will strip any high-bit characters because C means 7-bit ASCII charset. If you don't want this then you need to set your locale to something UTF-8, OR something ISO8859-1. */ // If empty message, yes this can happen, return if (in.empty()) return ""; if (cd == ICONV_NULL) return in; // can't convert size_t insize = in.size(); size_t outsize = insize; std::vector<char> out(outsize); char* out_ptr = &out[0]; size_t inbytesleft = insize; size_t outbytesleft = outsize; #ifdef HAVE_CONST_ICONV const char* in_ptr = in.data(); #else char* in_ptr = const_cast<char*>(in.data()); #endif size_t result = (size_t)(-1); bool again = true; while (again) { again = false; result = iconv(cd, &in_ptr, &inbytesleft, &out_ptr, &outbytesleft); if (result == (size_t)(-1)) { switch(errno) { case EILSEQ: // Try skipping a byte in_ptr++; inbytesleft--; again = true; case EINVAL: break; case E2BIG: // need more space! outsize += insize; out.resize(outsize); if (out.capacity() != outsize) again = true; outbytesleft += insize; out_ptr = (&out[0] + outsize) - outbytesleft; break; default: // something else broke perror("iconv"); break; } } } // copy to our return string std::string ret; ret.append(&out[0], outsize - outbytesleft); // reset the conversion descriptor iconv(cd, NULL, NULL, NULL, NULL); return ret; #else return in; #endif // HAVE_ICONV } FbString XStrToFb(const std::string &src) { return recode(s_iconv_convs[X2FB], src); } std::string FbStrToX(const FbString &src) { return recode(s_iconv_convs[FB2X], src); } /// Handle thislocale string encodings (strings coming from userspace) FbString LocaleStrToFb(const std::string &src) { return recode(s_iconv_convs[LOCALE2FB], src); } std::string FbStrToLocale(const FbString &src) { return recode(s_iconv_convs[FB2LOCALE], src); } bool haveUTF8() { #ifdef HAVE_ICONV if (s_iconv_convs[LOCALE2FB] != ICONV_NULL) return true; #endif // HAVE_ICONV return false; } } // end namespace StringUtil #ifdef HAVE_ICONV StringConvertor::StringConvertor(EncodingTarget target) : m_iconv(ICONV_NULL) { if (target == ToLocaleStr) m_destencoding = FbStringUtil::s_locale_codeset; else m_destencoding = "UTF-8"; } #else StringConvertor::StringConvertor(EncodingTarget target) { } #endif StringConvertor::~StringConvertor() { reset(); } bool StringConvertor::setSource(const std::string &encoding) { #ifdef HAVE_ICONV std::string tempenc = encoding.empty() ? FbStringUtil::s_locale_codeset : encoding; if ((tempenc == m_destencoding) && (m_iconv == ICONV_NULL)) { return true; } iconv_t newiconv = iconv_open(m_destencoding.c_str(), tempenc.c_str()); if (newiconv == ICONV_NULL) return false; else { if (m_iconv != ICONV_NULL) iconv_close(m_iconv); m_iconv = newiconv; return true; } #else return false; #endif } FbString StringConvertor::recode(const std::string &src) { #ifdef HAVE_ICONV return FbStringUtil::recode(m_iconv, src); #else return src; #endif } void StringConvertor::reset() { #ifdef HAVE_ICONV if (m_iconv != ICONV_NULL) iconv_close(m_iconv); m_iconv = ICONV_NULL; #endif } } // end namespace FbTk |