1/*
2 * libusb strerror code
3 * Copyright © 2013 Hans de Goede <hdegoede@redhat.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19#include "config.h"
20
21#include <locale.h>
22#include <stdlib.h>
23#include <string.h>
24
25#include "libusb.h"
26#include "libusbi.h"
27
28#if defined(_MSC_VER)
29#define strncasecmp _strnicmp
30#endif
31
32static size_t usbi_locale = 0;
33
34/** \ingroup misc
35 * How to add a new \ref libusb_strerror() translation:
36 * <ol>
37 * <li> Download the latest \c strerror.c from:<br>
38 *      https://raw.github.com/libusbx/libusbx/master/libusb/sterror.c </li>
39 * <li> Open the file in an UTF-8 capable editor </li>
40 * <li> Add the 2 letter <a href="http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes">ISO 639-1</a>
41 *      code for your locale at the end of \c usbi_locale_supported[]<br>
42 *    Eg. for Chinese, you would add "zh" so that:
43 *    \code... usbi_locale_supported[] = { "en", "nl", "fr" };\endcode
44 *    becomes:
45 *    \code... usbi_locale_supported[] = { "en", "nl", "fr", "zh" };\endcode </li>
46 * <li> Copy the <tt>{ / * English (en) * / ... }</tt> section and add it at the end of \c usbi_localized_errors<br>
47 *    Eg. for Chinese, the last section of \c usbi_localized_errors could look like:
48 *    \code
49 *     }, { / * Chinese (zh) * /
50 *         "Success",
51 *         ...
52 *         "Other error",
53 *     }
54 * };\endcode </li>
55 * <li> Translate each of the English messages from the section you copied into your language </li>
56 * <li> Save the file (in UTF-8 format) and send it to \c libusbx-devel\@lists.sourceforge.net </li>
57 * </ol>
58 */
59
60static const char* usbi_locale_supported[] = { "en", "nl", "fr" };
61static const char* usbi_localized_errors[ARRAYSIZE(usbi_locale_supported)][LIBUSB_ERROR_COUNT] = {
62	{ /* English (en) */
63		"Success",
64		"Input/Output Error",
65		"Invalid parameter",
66		"Access denied (insufficient permissions)",
67		"No such device (it may have been disconnected)",
68		"Entity not found",
69		"Resource busy",
70		"Operation timed out",
71		"Overflow",
72		"Pipe error",
73		"System call interrupted (perhaps due to signal)",
74		"Insufficient memory",
75		"Operation not supported or unimplemented on this platform",
76		"Other error",
77	}, { /* Dutch (nl) */
78		"Gelukt",
79		"Invoer-/uitvoerfout",
80		"Ongeldig argument",
81		"Toegang geweigerd (onvoldoende toegangsrechten)",
82		"Apparaat bestaat niet (verbinding met apparaat verbroken?)",
83		"Niet gevonden",
84		"Apparaat of hulpbron is bezig",
85		"Bewerking verlopen",
86		"Waarde is te groot",
87		"Gebroken pijp",
88		"Onderbroken systeemaanroep",
89		"Onvoldoende geheugen beschikbaar",
90		"Bewerking wordt niet ondersteund",
91		"Andere fout",
92	}, { /* French (fr) */
93		"Succès",
94		"Erreur d'entrée/sortie",
95		"Paramètre invalide",
96		"Accès refusé (permissions insuffisantes)",
97		"Périphérique introuvable (peut-être déconnecté)",
98		"Elément introuvable",
99		"Resource déjà occupée",
100		"Operation expirée",
101		"Débordement",
102		"Erreur de pipe",
103		"Appel système abandonné (peut-être à cause d’un signal)",
104		"Mémoire insuffisante",
105		"Opération non supportée or non implémentée sur cette plateforme",
106		"Autre erreur"
107	}
108};
109
110/** \ingroup misc
111 * Set the language, and only the language, not the encoding! used for
112 * translatable libusb messages.
113 *
114 * This takes a locale string in the default setlocale format: lang[-region]
115 * or lang[_country_region][.codeset]. Only the lang part of the string is
116 * used, and only 2 letter ISO 639-1 codes are accepted for it, such as "de".
117 * The optional region, country_region or codeset parts are ignored. This
118 * means that functions which return translatable strings will NOT honor the
119 * specified encoding.
120 * All strings returned are encoded as UTF-8 strings.
121 *
122 * If libusb_setlocale() is not called, all messages will be in English.
123 *
124 * The following functions return translatable strings: libusb_strerror().
125 * Note that the libusb log messages controlled through libusb_set_debug()
126 * are not translated, they are always in English.
127 *
128 * For POSIX UTF-8 environments if you want libusb to follow the standard
129 * locale settings, call libusb_setlocale(setlocale(LC_MESSAGES, NULL)),
130 * after your app has done its locale setup.
131 *
132 * \param locale locale-string in the form of lang[_country_region][.codeset]
133 * or lang[-region], where lang is a 2 letter ISO 639-1 code
134 * \returns LIBUSB_SUCCESS on success
135 * \returns LIBUSB_ERROR_INVALID_PARAM if the locale doesn't meet the requirements
136 * \returns LIBUSB_ERROR_NOT_FOUND if the requested language is not supported
137 * \returns a LIBUSB_ERROR code on other errors
138 */
139
140int API_EXPORTED libusb_setlocale(const char *locale)
141{
142	size_t i;
143
144	if ( (locale == NULL) || (strlen(locale) < 2)
145	  || ((strlen(locale) > 2) && (locale[2] != '-') && (locale[2] != '_') && (locale[2] != '.')) )
146		return LIBUSB_ERROR_INVALID_PARAM;
147
148	for (i=0; i<ARRAYSIZE(usbi_locale_supported); i++) {
149		if (strncasecmp(usbi_locale_supported[i], locale, 2) == 0)
150			break;
151	}
152	if (i >= ARRAYSIZE(usbi_locale_supported)) {
153		return LIBUSB_ERROR_NOT_FOUND;
154	}
155
156	usbi_locale = i;
157
158	return LIBUSB_SUCCESS;
159}
160
161/** \ingroup misc
162 * Returns a constant string with a short description of the given error code,
163 * this description is intended for displaying to the end user and will be in
164 * the language set by libusb_setlocale().
165 *
166 * The returned string is encoded in UTF-8.
167 *
168 * The messages always start with a capital letter and end without any dot.
169 * The caller must not free() the returned string.
170 *
171 * \param errcode the error code whose description is desired
172 * \returns a short description of the error code in UTF-8 encoding
173 */
174DEFAULT_VISIBILITY const char* LIBUSB_CALL libusb_strerror(enum libusb_error errcode)
175{
176	int errcode_index = -errcode;
177
178	if ((errcode_index < 0) || (errcode_index >= LIBUSB_ERROR_COUNT)) {
179		/* "Other Error", which should always be our last message, is returned */
180		errcode_index = LIBUSB_ERROR_COUNT - 1;
181	}
182
183	return usbi_localized_errors[usbi_locale][errcode_index];
184}
185