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/* $Id$
*
* Lasso - A free implementation of the Liberty Alliance specifications.
*
* Copyright (C) 2004-2007 Entr'ouvert
* http://lasso.entrouvert.org
*
* Authors: See AUTHORS file in top-level directory.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "./utils.h"
gchar*
lasso_safe_prefix_string(const gchar *str, gsize length)
{
GString *output;
gchar *ret;
gsize outputted = 0, i = 0;
fprintf (stderr, "Coin %s\n", str);
if (str == NULL) {
return strdup("NULL");
}
output = g_string_sized_new(length);
for (i = 0; i < length && str[i] && outputted < length; i++) {
gchar c = 0;
guint len;
if ((guchar)str[i] < 128 && (guchar)str[i] > 31) {
g_string_append_c(output, str[i]);
outputted++;
continue;
}
switch (str[i]) {
case '\n':
c = 'n';
break;
case '\t':
c = 't';
break;
case '\r':
c = 'r';
}
if (c) {
if (outputted - length > 1) {
g_string_append_c(output, '\\');
g_string_append_c(output, c);
outputted += 2;
continue;
}
}
if (c < 8) {
len = 3;
} else if (c < 64) {
len = 4;
} else {
len = 5;
}
if (outputted - length >= len) {
g_string_append_c(output, '\\');
g_string_append_printf(output, "%o", (guint)str[i]);
}
break;
}
ret = output->str;
g_string_free(output, FALSE);
return ret;
}
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