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/*
* Copyright (c) 2003-2017, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <system.hh>
#include "utils.h"
namespace ledger {
std::ostringstream _ctxt_buffer;
std::ostringstream _desc_buffer;
string error_context()
{
string context = _ctxt_buffer.str();
_ctxt_buffer.clear();
_ctxt_buffer.str("");
return context;
}
string file_context(const path& file, const std::size_t line)
{
std::ostringstream buf;
buf << '"' << file.string() << "\", line " << line << ":";
return buf.str();
}
string line_context(const string& line,
const string::size_type pos,
const string::size_type end_pos)
{
std::ostringstream buf;
buf << " " << line << "\n";
if (pos != 0) {
buf << " ";
if (end_pos == 0) {
for (string::size_type i = 0; i < pos; i += 1)
buf << " ";
buf << "^";
} else {
for (string::size_type i = 0; i < end_pos; i += 1) {
if (i >= pos)
buf << "^";
else
buf << " ";
}
}
}
return buf.str();
}
string source_context(const path& file,
const istream_pos_type pos,
const istream_pos_type end_pos,
const string& prefix)
{
const std::streamoff len = end_pos - pos;
if (! len || file.empty())
return _("<no source context>");
assert(len > 0);
assert(len < 8192);
std::ostringstream out;
ifstream in(file);
in.seekg(pos, std::ios::beg);
scoped_array<char> buf(new char[static_cast<std::size_t>(len) + 1]);
in.read(buf.get(), static_cast<std::streamsize>(len));
assert(in.gcount() == static_cast<std::streamsize>(len));
buf[static_cast<std::ptrdiff_t>(len)] = '\0';
bool first = true;
for (char * p = std::strtok(buf.get(), "\n");
p;
p = std::strtok(NULL, "\n")) {
if (first)
first = false;
else
out << '\n';
out << prefix << p;
}
return out.str();
}
} // namespace ledger
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