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/* String wrapping helper function.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL 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; either version 3 of the License, or (at your
option) any later version.
The PPL 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 this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#include <ppl-config.h>
#include "wrap_string.hh"
#include <cstdlib>
namespace Parma_Polyhedra_Library {
namespace IO_Operators {
std::string
wrap_string(const std::string& src_string,
unsigned indent_depth,
unsigned preferred_first_line_length,
unsigned preferred_line_length) {
std::string dst_string;
const char *src = src_string.c_str();
for (int line = 0; ; ++line) {
int linelen = (line == 0
? preferred_first_line_length
: preferred_line_length);
int last_comma = -1;
int last_space = -1;
int split_pos = -1;
int i;
for (i = 0; i <= linelen; ++i) {
if (src[i] == '\0' || src[i] == '\n') {
split_pos = i;
break;
}
if (src[i] == ',' && i < linelen)
last_comma = i;
if (isspace(src[i]) && (i == 0 || !isspace(src[i-1])))
last_space = i;
}
if (split_pos < 0) {
if (last_comma >= 0)
split_pos = last_comma + 1;
else if (last_space >= 0)
split_pos = last_space;
else {
for ( ; src[i]; ++i) {
if (src[i] == ',') {
++i;
break;
}
if (isspace(src[i]))
break;
}
split_pos = i;
}
}
if (split_pos > 0 && line > 0 && indent_depth > 0)
dst_string.append(indent_depth, ' ');
dst_string.append(src, split_pos);
src += split_pos;
if (isspace(*src))
++src;
while (*src == ' ')
++src;
if (*src == '\0')
break;
dst_string.push_back('\n');
}
return dst_string;
}
} // namespace IO_Operators
} // namespace Parma_Polyhedra_Library
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