1 files changed, 93 insertions, 0 deletions
diff --git a/src/wrap_string.cc b/src/wrap_string.cc
new file mode 100644
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--- /dev/null
+++ b/src/wrap_string.cc
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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
+