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db2bc96512
If a translation file exists in a "translations" directory located in the same directory as the binary, it is used in priority (this can be useful when working on translations as you don't have to recompile the whole program all the time), and if no such file is found the embedded translation file is used (if it exists).
319 lines
10 KiB
C++
319 lines
10 KiB
C++
// Copyright (c) 2014-2017, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <string>
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#include <map>
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#include "include_base_utils.h"
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#include "file_io_utils.h"
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#include "common/util.h"
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#include "common/i18n.h"
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#include "translation_files.h"
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#undef MONERO_DEFAULT_LOG_CATEGORY
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#define MONERO_DEFAULT_LOG_CATEGORY "i18n"
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static const unsigned char qm_magic[16] = {0x3c, 0xb8, 0x64, 0x18, 0xca, 0xef, 0x9c, 0x95, 0xcd, 0x21, 0x1c, 0xbf, 0x60, 0xa1, 0xbd, 0xdd};
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static std::map<std::string,std::string> i18n_entries;
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/* Logging isn't initialized yet when this is run */
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/* add std::flush, because std::endl doesn't seem to flush, contrary to expected */
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// #define i18n_log(x) do { std::cout << __FILE__ << ":" << __LINE__ << ": " << x << std::endl; std::cout << std::flush; } while(0)
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#define i18n_log(x) ((void)0)
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std::string i18n_get_language()
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{
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const char *e;
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e = getenv("LANG");
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i18n_log("LANG=" << e);
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if (!e || !*e) {
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e = getenv("LC_ALL");
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i18n_log("LC_ALL=" << e);
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}
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if (!e || !*e)
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e = "en";
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std::string language = e;
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language = language.substr(0, language.find("."));
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std::transform(language.begin(), language.end(), language.begin(), tolower);
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return language;
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}
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static uint32_t be32(const unsigned char *data)
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{
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return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
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}
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static std::string utf16(const unsigned char *data, uint32_t len)
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{
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std::string s;
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while (len >= 2) {
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uint32_t code = (data[0] << 8) | data[1];
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data += 2;
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len -= 2;
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if (code >= 0xd800 && code <= 0xdbfff && len >= 2) {
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uint32_t next = (data[0] << 8) | data[1];
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if (next >= 0xdc00 && next <= 0xdfff) {
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code = (code << 10) + next - 0x35dfc00;
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data += 2;
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len -= 2;
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}
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}
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if (code <= 0x7f) {
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s += (char)code;
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}
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else if (code <= 0x7ff) {
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s += 0xc0 | (code >> 6);
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s += 0x80 | (code & 0x3f);
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}
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else if (code <= 0xffff) {
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s += 0xe0 | (code >> 12);
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s += 0x80 | ((code >> 6) & 0x3f);
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s += 0x80 | (code & 0x3f);
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}
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else {
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s += 0xf0 | (code >> 18);
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s += 0x80 | ((code >> 12) & 0x3f);
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s += 0x80 | ((code >> 6) & 0x3f);
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s += 0x80 | (code & 0x3f);
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}
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}
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return s;
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}
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static std::string utf8(const unsigned char *data, uint32_t len)
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{
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/* assume well formedness */
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return std::string((const char *)data,len);
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}
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int i18n_set_language(const char *directory, const char *base, std::string language)
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{
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std::string filename, contents;
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const unsigned char *data;
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size_t datalen;
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size_t idx;
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unsigned char chunk_type;
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uint32_t chunk_size;
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uint32_t num_messages = (uint32_t)-1;
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uint32_t messages_idx = (uint32_t)-1;
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uint32_t offsets_idx = (uint32_t)-1;
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std::string translation, source, context;
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i18n_log("i18n_set_language(" << directory << "," << base << ")");
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if (!directory || !base)
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return -1;
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if (language.empty())
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language = i18n_get_language();
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filename = std::string(directory) + "/" + base + "_" + language + ".qm";
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i18n_log("Loading translations for language " << language);
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boost::system::error_code ignored_ec;
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if (boost::filesystem::exists(filename, ignored_ec)) {
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if (!epee::file_io_utils::load_file_to_string(filename, contents)) {
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i18n_log("Failed to load translations file: " << filename);
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return -1;
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}
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} else {
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i18n_log("Translations file not found: " << filename);
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filename = std::string(base) + "_" + language + ".qm";
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if (!find_embedded_file(filename, contents)) {
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i18n_log("Embedded translations file not found: " << filename);
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const char *underscore = strchr(language.c_str(), '_');
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if (underscore) {
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std::string fallback_language = std::string(language, 0, underscore - language.c_str());
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filename = std::string(directory) + "/" + base + "_" + fallback_language + ".qm";
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i18n_log("Loading translations for language " << fallback_language);
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if (boost::filesystem::exists(filename, ignored_ec)) {
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if (!epee::file_io_utils::load_file_to_string(filename, contents)) {
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i18n_log("Failed to load translations file: " << filename);
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return -1;
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}
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} else {
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i18n_log("Translations file not found: " << filename);
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filename = std::string(base) + "_" + fallback_language + ".qm";
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if (!find_embedded_file(filename, contents)) {
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i18n_log("Embedded translations file not found: " << filename);
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return -1;
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}
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}
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} else {
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return -1;
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}
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}
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}
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data = (const unsigned char*)contents.c_str();
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datalen = contents.size();
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idx = 0;
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i18n_log("Translations file size: " << datalen);
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/* Format of the QM file (AFAICT):
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* 16 bytes magic
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* chunk list: N instances of chunks:
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* 1 byte: chunk type (0x42: offsets, 0x69: messages)
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* 4 bytes: chunk length, big endian
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* D bytes: "chunk length" bytes of data
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*
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* 0x42 chunk: N instances of subchunks:
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* 1 byte: subchunk type
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* 0x01: end, no data
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* 0x02: unsupported
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* 0x03: translation
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* 4 bytes: string length, big endian
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* N bytes: string data, UTF-16 (or UCS2-BE ?)
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* 0x04: unsupported
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* 0x05: obsolete, unsupported
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* 0x06: source text
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* 0x07: context
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* 0x08: obsolete, unsupported
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* other: unsupported
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* 4 bytes: subchunk length, big endian - except for 0x01, which has none
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* S bytes: "chunk length" bytes of data
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* 0x69 chunk:
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* string data indexed by the 0x42 chunk data
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*/
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if (datalen < sizeof(qm_magic) || memcmp(data, qm_magic, sizeof(qm_magic))) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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idx += sizeof(qm_magic);
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while (idx < datalen) {
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if (idx + 5 > datalen) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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chunk_type = data[idx++];
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chunk_size = be32(data+idx);
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idx += 4;
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i18n_log("Found " << chunk_type << " of " << chunk_size << " bytes");
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if (chunk_size >= datalen || idx > datalen - chunk_size) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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switch (chunk_type) {
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case 0x42:
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i18n_log("Found offsets at " << idx);
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/* two 32 bit integers, and possible padding */
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offsets_idx = idx;
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num_messages = chunk_size / 8;
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break;
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case 0x69:
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i18n_log("Found messages at " << idx);
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messages_idx = idx;
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break;
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default:
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i18n_log("Found unsupported chunk type: " << chunk_type);
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break;
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}
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idx += chunk_size;
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}
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if (offsets_idx == (uint32_t)-1) {
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i18n_log("No offsets chunk found");
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return -1;
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}
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if (messages_idx == (uint32_t)-1) {
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i18n_log("No messages chunk found");
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return -1;
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}
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for (uint32_t m = 0; m < num_messages; ++m) {
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be32(data+offsets_idx+m*8); // unused
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idx = be32(data+offsets_idx+m*8+4);
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idx += messages_idx;
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if (idx > datalen || idx + 1 > datalen) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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while (1) {
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if (idx + 5 > datalen) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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chunk_type = data[idx++];
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chunk_size = 0;
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if (chunk_type == 0x01) {
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i18n_entries[context + std::string("",1) + source] = translation;
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context = std::string();
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source = std::string();
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translation = std::string();
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break;
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}
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chunk_size = be32(data+idx);
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idx += 4;
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i18n_log("Found " << chunk_type << " of " << chunk_size << " bytes");
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if (chunk_size >= datalen || idx > datalen - chunk_size) {
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i18n_log("Bad translations file format: " << filename);
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return -1;
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}
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switch (chunk_type) {
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case 0x03: // translation, UTF-16
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translation = utf16(data+idx, chunk_size);
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i18n_log("Found translation: " << translation);
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break;
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case 0x06: // source, UTF-8
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source = utf8(data+idx, chunk_size);
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i18n_log("Found source: " << source);
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break;
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case 0x07: // context, UTF-8
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context = utf8(data+idx, chunk_size);
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i18n_log("Found context: " << context);
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break;
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}
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idx += chunk_size;
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}
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}
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return 0;
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}
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/* The entries is constant by that time */
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const char *i18n_translate(const char *s, const std::string &context)
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{
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const std::string key = context + std::string("", 1) + s;
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std::map<std::string,std::string>::const_iterator i = i18n_entries.find(key);
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if (i == i18n_entries.end())
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return s;
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return (*i).second.c_str();
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}
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