danicoin/src/common/i18n.cpp

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// Copyright (c) 2014-2016, The Monero Project
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//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <string>
#include <map>
#include "include_base_utils.h"
#include "file_io_utils.h"
#include "common/util.h"
#include "common/i18n.h"
Change logging to easylogging++ This replaces the epee and data_loggers logging systems with a single one, and also adds filename:line and explicit severity levels. Categories may be defined, and logging severity set by category (or set of categories). epee style 0-4 log level maps to a sensible severity configuration. Log files now also rotate when reaching 100 MB. To select which logs to output, use the MONERO_LOGS environment variable, with a comma separated list of categories (globs are supported), with their requested severity level after a colon. If a log matches more than one such setting, the last one in the configuration string applies. A few examples: This one is (mostly) silent, only outputting fatal errors: MONERO_LOGS=*:FATAL This one is very verbose: MONERO_LOGS=*:TRACE This one is totally silent (logwise): MONERO_LOGS="" This one outputs all errors and warnings, except for the "verify" category, which prints just fatal errors (the verify category is used for logs about incoming transactions and blocks, and it is expected that some/many will fail to verify, hence we don't want the spam): MONERO_LOGS=*:WARNING,verify:FATAL Log levels are, in decreasing order of priority: FATAL, ERROR, WARNING, INFO, DEBUG, TRACE Subcategories may be added using prefixes and globs. This example will output net.p2p logs at the TRACE level, but all other net* logs only at INFO: MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE Logs which are intended for the user (which Monero was using a lot through epee, but really isn't a nice way to go things) should use the "global" category. There are a few helper macros for using this category, eg: MGINFO("this shows up by default") or MGINFO_RED("this is red"), to try to keep a similar look and feel for now. Existing epee log macros still exist, and map to the new log levels, but since they're used as a "user facing" UI element as much as a logging system, they often don't map well to log severities (ie, a log level 0 log may be an error, or may be something we want the user to see, such as an important info). In those cases, I tried to use the new macros. In other cases, I left the existing macros in. When modifying logs, it is probably best to switch to the new macros with explicit levels. The --log-level options and set_log commands now also accept category settings, in addition to the epee style log levels.
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#undef MONERO_DEFAULT_LOG_CATEGORY
#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};
static std::map<std::string,std::string> i18n_entries;
/* Logging isn't initialized yet when this is run */
/* add std::flush, because std::endl doesn't seem to flush, contrary to expected */
// #define i18n_log(x) do { std::cout << __FILE__ << ":" << __LINE__ << ": " << x << std::endl; std::cout << std::flush; } while(0)
#define i18n_log(x) ((void)0)
std::string i18n_get_language()
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{
const char *e;
e = getenv("LANG");
i18n_log("LANG=" << e);
if (!e || !*e) {
e = getenv("LC_ALL");
i18n_log("LC_ALL=" << e);
}
if (!e || !*e)
e = "en";
std::string language = e;
std::transform(language.begin(), language.end(), language.begin(), tolower);
return language;
}
static uint32_t be32(const unsigned char *data)
{
return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
}
static std::string utf16(const unsigned char *data, uint32_t len)
{
std::string s;
while (len >= 2) {
uint32_t code = (data[0] << 8) | data[1];
data += 2;
len -= 2;
if (code >= 0xd800 && code <= 0xdbfff && len >= 2) {
uint32_t next = (data[0] << 8) | data[1];
if (next >= 0xdc00 && next <= 0xdfff) {
code = (code << 10) + next - 0x35dfc00;
data += 2;
len -= 2;
}
}
if (code <= 0x7f) {
s += (char)code;
}
else if (code <= 0x7ff) {
s += 0xc0 | (code >> 6);
s += 0x80 | (code & 0x3f);
}
else if (code <= 0xffff) {
s += 0xe0 | (code >> 12);
s += 0x80 | ((code >> 6) & 0x3f);
s += 0x80 | (code & 0x3f);
}
else {
s += 0xf0 | (code >> 18);
s += 0x80 | ((code >> 12) & 0x3f);
s += 0x80 | ((code >> 6) & 0x3f);
s += 0x80 | (code & 0x3f);
}
}
return s;
}
static std::string utf8(const unsigned char *data, uint32_t len)
{
/* assume well formedness */
return std::string((const char *)data,len);
}
int i18n_set_language(const char *directory, const char *base, std::string language)
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{
std::string filename, contents;
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const unsigned char *data;
size_t datalen;
size_t idx;
unsigned char chunk_type;
uint32_t chunk_size;
uint32_t num_messages = (uint32_t)-1;
uint32_t messages_idx = (uint32_t)-1;
uint32_t offsets_idx = (uint32_t)-1;
std::string translation, source, context;
i18n_log("i18n_set_language(" << directory << "," << base << ")");
if (!directory || !base)
return -1;
if (language.empty())
language = i18n_get_language();
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filename = std::string(directory) + "/" + base + "_" + language + ".qm";
i18n_log("Loading translations for language " << language);
boost::system::error_code ignored_ec;
if (!boost::filesystem::exists(filename, ignored_ec)) {
i18n_log("Translations file not found: " << filename);
const char *underscore = strchr(language.c_str(), '_');
if (underscore) {
std::string fallback_language = std::string(language, 0, underscore - language.c_str());
filename = std::string(directory) + "/" + base + "_" + fallback_language + ".qm";
i18n_log("Not found, loading translations for language " << fallback_language);
if (!boost::filesystem::exists(filename, ignored_ec)) {
i18n_log("Translations file not found: " << filename);
return -1;
}
}
}
if (!epee::file_io_utils::load_file_to_string(filename, contents)) {
i18n_log("Failed to load translations file: " << filename);
return -1;
}
data = (const unsigned char*)contents.c_str();
datalen = contents.size();
idx = 0;
i18n_log("Translations file size: " << datalen);
/* Format of the QM file (AFAICT):
* 16 bytes magic
* chunk list: N instances of chunks:
* 1 byte: chunk type (0x42: offsets, 0x69: messages)
* 4 bytes: chunk length, big endian
* D bytes: "chunk length" bytes of data
*
* 0x42 chunk: N instances of subchunks:
* 1 byte: subchunk type
* 0x01: end, no data
* 0x02: unsupported
* 0x03: translation
* 4 bytes: string length, big endian
* N bytes: string data, UTF-16 (or UCS2-BE ?)
* 0x04: unsupported
* 0x05: obsolete, unsupported
* 0x06: source text
* 0x07: context
* 0x08: obsolete, unsupported
* other: unsupported
* 4 bytes: subchunk length, big endian - except for 0x01, which has none
* S bytes: "chunk length" bytes of data
* 0x69 chunk:
* string data indexed by the 0x42 chunk data
*/
if (datalen < sizeof(qm_magic) || memcmp(data, qm_magic, sizeof(qm_magic))) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
idx += sizeof(qm_magic);
while (idx < datalen) {
if (idx + 5 > datalen) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
chunk_type = data[idx++];
chunk_size = be32(data+idx);
idx += 4;
i18n_log("Found " << chunk_type << " of " << chunk_size << " bytes");
if (chunk_size >= datalen || idx > datalen - chunk_size) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
switch (chunk_type) {
case 0x42:
i18n_log("Found offsets at " << idx);
/* two 32 bit integers, and possible padding */
offsets_idx = idx;
num_messages = chunk_size / 8;
break;
case 0x69:
i18n_log("Found messages at " << idx);
messages_idx = idx;
break;
default:
i18n_log("Found unsupported chunk type: " << chunk_type);
break;
}
idx += chunk_size;
}
if (offsets_idx == (uint32_t)-1) {
i18n_log("No offsets chunk found");
return -1;
}
if (messages_idx == (uint32_t)-1) {
i18n_log("No messages chunk found");
return -1;
}
for (uint32_t m = 0; m < num_messages; ++m) {
be32(data+offsets_idx+m*8); // unused
idx = be32(data+offsets_idx+m*8+4);
idx += messages_idx;
if (idx > datalen || idx + 1 > datalen) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
while (1) {
if (idx + 5 > datalen) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
chunk_type = data[idx++];
chunk_size = 0;
if (chunk_type == 0x01) {
i18n_entries[context + std::string("",1) + source] = translation;
context = std::string();
source = std::string();
translation = std::string();
break;
}
chunk_size = be32(data+idx);
idx += 4;
i18n_log("Found " << chunk_type << " of " << chunk_size << " bytes");
if (chunk_size >= datalen || idx > datalen - chunk_size) {
i18n_log("Bad translations file format: " << filename);
return -1;
}
switch (chunk_type) {
case 0x03: // translation, UTF-16
translation = utf16(data+idx, chunk_size);
i18n_log("Found translation: " << translation);
break;
case 0x06: // source, UTF-8
source = utf8(data+idx, chunk_size);
i18n_log("Found source: " << source);
break;
case 0x07: // context, UTF-8
context = utf8(data+idx, chunk_size);
i18n_log("Found context: " << context);
break;
}
idx += chunk_size;
}
}
return 0;
}
/* The entries is constant by that time */
const char *i18n_translate(const char *s, const std::string &context)
{
const std::string key = context + std::string("", 1) + s;
std::map<std::string,std::string>::const_iterator i = i18n_entries.find(key);
if (i == i18n_entries.end())
return s;
return (*i).second.c_str();
}