94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/* $Id$
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*
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* Lasso - A free implementation of the Liberty Alliance specifications.
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*
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* Copyright (C) 2004-2007 Entr'ouvert
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* http://lasso.entrouvert.org
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*
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* Authors: See AUTHORS file in top-level directory.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include "./utils.h"
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/**
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* SECTION:utilities
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* @short_description: Misc functions used internally in Lasso
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* @stability: Internal
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* @include: utils.h
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*/
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gchar*
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lasso_safe_prefix_string(const gchar *str, gsize length)
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{
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GString *output;
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gchar *ret;
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gsize outputted = 0, i = 0;
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fprintf (stderr, "Coin %s\n", str);
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if (str == NULL) {
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return strdup("NULL");
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}
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output = g_string_sized_new(length);
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for (i = 0; i < length && str[i] && outputted < length; i++) {
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gchar c = 0;
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guint len;
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if ((guchar)str[i] < 128 && (guchar)str[i] > 31) {
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g_string_append_c(output, str[i]);
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outputted++;
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continue;
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}
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switch (str[i]) {
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case '\n':
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c = 'n';
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break;
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case '\t':
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c = 't';
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break;
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case '\r':
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c = 'r';
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}
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if (c) {
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if (outputted - length > 1) {
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g_string_append_c(output, '\\');
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g_string_append_c(output, c);
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outputted += 2;
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continue;
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}
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}
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if (c < 8) {
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len = 3;
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} else if (c < 64) {
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len = 4;
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} else {
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len = 5;
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}
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if (outputted - length >= len) {
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g_string_append_c(output, '\\');
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g_string_append_printf(output, "%o", (guint)str[i]);
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}
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break;
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}
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ret = output->str;
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g_string_free(output, FALSE);
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return ret;
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}
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