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/* Pedantic checking of DWARF files
Copyright (C) 2010 Red Hat, Inc.
This file is part of Red Hat elfutils.
Red Hat elfutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by the
Free Software Foundation; version 2 of the License.
Red Hat elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with Red Hat elfutils; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
Red Hat elfutils is an included package of the Open Invention Network.
An included package of the Open Invention Network is a package for which
Open Invention Network licensees cross-license their patents. No patent
license is granted, either expressly or impliedly, by designation as an
included package. Should you wish to participate in the Open Invention
Network licensing program, please visit www.openinventionnetwork.com
<http://www.openinventionnetwork.com>. */
#include "wrap.hh"
#include <cassert>
#include <cstring>
namespace
{
size_t
skip_blank (char const *str, size_t pos)
{
while (isblank (str[pos]))
pos++;
return pos;
}
}
wrapline_t::wrapline_t (size_t start, size_t end, size_t indent)
: _m_start (start)
, _m_end (end)
, _m_indent (indent)
{
assert (end >= start);
}
std::string
wrapline_t::build (char const *image) const
{
assert (_m_end <= std::strlen (image));
std::string main (image, _m_start, _m_end - _m_start);
char const *padding = spaces (_m_indent);
return std::string (padding) + main;
}
wrap_str::wrap_str (char const *str, unsigned width)
: _m_image (str)
{
size_t pos = 0;
bool newline = true;
size_t indent = 0;
size_t str_size = std::strlen (str);
while (pos < str_size)
{
size_t last = pos;
// This is how long a line we can allocate.
size_t length = width;
// For newlines, i.e. right after hard EOL (\n) in input string,
// we look for indentation and bullets.
if (newline)
{
pos = skip_blank (str, pos);
if (pos < str_size && str[pos] == '-')
pos = skip_blank (str, pos + 1);
indent = pos - last;
}
length -= indent;
// Take the remainder of the line, but don't cross hard EOLs.
for (; length > 0 && pos < str_size; --length)
if (str[pos] == '\n')
break;
else
pos++;
// We may have ended mid-word. Look back to first white space.
// Look as far back as the end of previous line.
size_t space = pos;
for (; space > last; --space)
if (space == str_size || isspace (str[space]))
break;
// While skipping back, we might end at the very beginning. If
// that's the case, we have a word that doesn't fit user limit.
// Include it whole anyway. For newline, account for
// freshly-introduced indent.
if (space <= last + (newline ? indent : 0))
{
space = pos;
while (space < str_size && !isspace (str[space]))
space++;
}
// We have a line!
push_back (wrapline_t (last, space, newline ? 0 : indent));
// Skip useless white space at the end of the line, up to EOL.
while (space < str_size && isspace (str[space]) && str[space] != '\n')
space++;
if (str[space] == '\n')
{
space++;
indent = 0;
newline = true;
}
else
newline = false;
pos = space;
}
}
std::string
wrap_str::join () const
{
std::string ret;
for (const_iterator it = begin (); it != end (); ++it)
ret += build (it) + "\n";
return ret;
}
std::string
wrap_str::build (wrap_str::const_iterator it) const
{
return it->build (_m_image);
}
namespace
{
template <unsigned Max>
class spc
{
char *_m_buf;
char *_m_endp;
public:
spc ()
: _m_buf (new char[Max])
, _m_endp (_m_buf + Max - 1)
{
std::memset (_m_buf, ' ', Max - 1);
_m_buf[Max - 1] = 0;
}
~spc ()
{
delete [] _m_buf;
}
char const *get (size_t n)
{
assert (n < Max);
return _m_endp - n;
}
};
}
char const *
spaces (size_t n)
{
static spc<128> spaces;
return spaces.get (n);
}
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