116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
/*
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* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "utils.h"
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namespace ledger {
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straccstream _ctxt_accum;
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std::ostringstream _ctxt_buffer;
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straccstream _desc_accum;
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std::ostringstream _desc_buffer;
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string error_context()
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{
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string context = _ctxt_buffer.str();
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_ctxt_buffer.str("");
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return context;
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}
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string file_context(const path& file, std::size_t line)
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{
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std::ostringstream buf;
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buf << "\"" << file << "\", line " << line << ": ";
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return buf.str();
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}
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string line_context(const string& line,
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std::size_t pos,
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std::size_t end_pos)
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{
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std::ostringstream buf;
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buf << " " << line << "\n";
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if (pos != 0) {
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buf << " ";
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if (end_pos == 0) {
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for (std::size_t i = 0; i < pos; i += 1)
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buf << " ";
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buf << "^";
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} else {
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for (std::size_t i = 0; i < end_pos; i += 1) {
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if (i >= pos)
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buf << "^";
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else
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buf << " ";
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}
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}
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}
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return buf.str();
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}
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string source_context(const path& file,
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istream_pos_type pos,
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istream_pos_type end_pos,
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const string& prefix)
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{
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std::streamoff len = end_pos - pos;
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if (! len || file == path("/dev/stdin"))
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return _("<no source context>");
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assert(len > 0);
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assert(len < 2048);
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std::ostringstream out;
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ifstream in(file);
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in.seekg(pos, std::ios::beg);
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scoped_array<char> buf(new char[len + 1]);
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in.read(buf.get(), static_cast<int>(len));
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assert(static_cast<std::size_t>(in.gcount()) == len);
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buf[static_cast<int>(len)] = '\0';
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bool first = true;
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for (char * p = std::strtok(buf.get(), "\n");
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p;
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p = std::strtok(NULL, "\n")) {
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if (first)
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first = false;
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else
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out << '\n';
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out << prefix << p;
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}
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return out.str();
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}
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} // namespace ledger
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