/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <locale.h>
#import "OFLocale.h"
#import "OFString.h"
#import "OFArray.h"
#import "OFDictionary.h"
#import "OFNumber.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOpenItemFailedException.h"
#ifdef OF_AMIGAOS
# include <proto/dos.h>
# include <proto/exec.h>
# include <proto/locale.h>
#endif
static OFLocale *currentLocale = nil;
static OFDictionary *operatorPrecedences = nil;
#ifndef OF_AMIGAOS
static void
parseLocale(char *locale, OFStringEncoding *encoding,
OFString **language, OFString **territory)
{
locale = OFStrDup(locale);
@try {
OFStringEncoding enc = OFStringEncodingASCII;
char *tmp;
/* We don't care for extras behind the @ */
if ((tmp = strrchr(locale, '@')) != NULL)
*tmp = '\0';
/* Encoding */
if ((tmp = strrchr(locale, '.')) != NULL) {
*tmp++ = '\0';
@try {
if (encoding != NULL)
*encoding = OFStringEncodingParseName(
[OFString stringWithCString: tmp
encoding: enc]);
} @catch (OFInvalidArgumentException *e) {
}
}
/* Territory */
if ((tmp = strrchr(locale, '_')) != NULL) {
*tmp++ = '\0';
if (territory != NULL)
*territory = [OFString stringWithCString: tmp
encoding: enc];
}
if (language != NULL)
*language = [OFString stringWithCString: locale
encoding: enc];
} @finally {
OFFreeMemory(locale);
}
}
#endif
static bool
evaluateCondition(OFString *condition_, OFDictionary *variables)
{
OFMutableString *condition = [[condition_ mutableCopy] autorelease];
OFMutableArray *tokens, *operators, *stack;
/* Empty condition is the fallback that's always true */
if (condition.length == 0)
return true;
/*
* Dirty hack to allow not needing spaces after "!" or "(" and spaces
* before ")".
* TODO: Replace with a proper tokenizer.
*/
[condition replaceOccurrencesOfString: @"!" withString: @"! "];
[condition replaceOccurrencesOfString: @"(" withString: @"( "];
[condition replaceOccurrencesOfString: @")" withString: @" )"];
/* Substitute variables and convert to RPN first */
tokens = [OFMutableArray array];
operators = [OFMutableArray array];
for (OFString *token in [condition
componentsSeparatedByString: @" "
options: OFStringSkipEmptyComponents]) {
unsigned precedence;
OFUnichar c;
if ([token isEqual: @"("]) {
[operators addObject: @"("];
continue;
}
if ([token isEqual: @")"]) {
for (;;) {
OFString *operator = operators.lastObject;
if (operator == nil)
@throw [OFInvalidFormatException
exception];
if ([operator isEqual: @"("]) {
[operators removeLastObject];
break;
}
[tokens addObject: operator];
[operators removeLastObject];
}
continue;
}
precedence = [[operatorPrecedences objectForKey: token]
unsignedIntValue];
if (precedence > 0) {
for (;;) {
OFNumber *operator = operators.lastObject;
unsigned otherPrecedence;
if (operator == nil || [operator isEqual: @"("])
break;
otherPrecedence = [[operatorPrecedences
objectForKey: operator] unsignedIntValue];
if (otherPrecedence >= precedence)
break;
[tokens addObject: operator];
[operators removeLastObject];
}
[operators addObject: token];
continue;
}
c = [token characterAtIndex: 0];
if ((c < '0' || c > '9') && c != '-')
if ((token = [variables objectForKey: token]) == nil)
@throw [OFInvalidFormatException exception];
[tokens addObject:
[OFNumber numberWithDouble: token.doubleValue]];
}
for (size_t i = operators.count; i > 0; i--) {
OFString *operator = [operators objectAtIndex: i - 1];
if ([operator isEqual: @"("])
@throw [OFInvalidFormatException exception];
[tokens addObject: operator];
}
/* Evaluate RPN */
stack = [OFMutableArray array];
for (id token in tokens) {
unsigned precedence = [[operatorPrecedences
objectForKey: token] unsignedIntValue];
id var, first, second;
size_t stackSize;
/* Only unary operators have precedence 1 */
if (precedence > 1) {
stackSize = stack.count;
first = [stack objectAtIndex: stackSize - 2];
second = [stack objectAtIndex: stackSize - 1];
if ([token isEqual: @"=="])
var = [OFNumber numberWithBool:
[first isEqual: second]];
else if ([token isEqual: @"!="])
var = [OFNumber numberWithBool:
![first isEqual: second]];
else if ([token isEqual: @"<"])
var = [OFNumber numberWithBool: [first
compare: second] == OFOrderedAscending];
else if ([token isEqual: @"<="])
var = [OFNumber numberWithBool: [first
compare: second] != OFOrderedDescending];
else if ([token isEqual: @">"])
var = [OFNumber numberWithBool: [first
compare: second] == OFOrderedDescending];
else if ([token isEqual: @">="])
var = [OFNumber numberWithBool: [first
compare: second] != OFOrderedAscending];
else if ([token isEqual: @"+"])
var = [OFNumber numberWithDouble:
[first doubleValue] + [second doubleValue]];
else if ([token isEqual: @"%"])
var = [OFNumber numberWithLongLong:
[first longLongValue] %
[second longLongValue]];
else if ([token isEqual: @"&&"])
var = [OFNumber numberWithBool:
[first boolValue] && [second boolValue]];
else if ([token isEqual: @"||"])
var = [OFNumber numberWithBool:
[first boolValue] || [second boolValue]];
else
OFEnsure(0);
[stack replaceObjectAtIndex: stackSize - 2
withObject: var];
[stack removeLastObject];
} else if (precedence == 1) {
stackSize = stack.count;
first = stack.lastObject;
if ([token isEqual: @"!"])
var = [OFNumber numberWithBool:
![first boolValue]];
else if ([token isEqual: @"is_real"])
var = [OFNumber numberWithBool:
([first doubleValue] !=
[first longLongValue])];
else
OFEnsure(0);
[stack replaceObjectAtIndex: stackSize - 1
withObject: var];
} else
[stack addObject: token];
}
if (stack.count != 1)
@throw [OFInvalidFormatException exception];
return [stack.firstObject boolValue];
}
static OFString *
evaluateConditionals(OFArray *conditions, OFDictionary *variables)
{
for (OFDictionary *dictionary in conditions) {
OFString *condition, *value;
bool found = false;
for (OFString *key in dictionary) {
if (found)
@throw [OFInvalidFormatException exception];
condition = key;
value = [dictionary objectForKey: key];
if (![condition isKindOfClass: [OFString class]] ||
![value isKindOfClass: [OFString class]])
@throw [OFInvalidFormatException exception];
found = true;
}
if (!found)
@throw [OFInvalidFormatException exception];
if (evaluateCondition(condition, variables))
return value;
}
/* Need to have a fallback as the last one. */
@throw [OFInvalidFormatException exception];
}
static OFString *
evaluateArray(OFArray *array, OFDictionary *variables)
{
OFMutableString *string = [OFMutableString string];
for (id object in array) {
if ([object isKindOfClass: [OFString class]])
[string appendString: object];
else if ([object isKindOfClass: [OFArray class]])
[string appendString:
evaluateConditionals(object, variables)];
else
@throw [OFInvalidFormatException exception];
}
[string makeImmutable];
return string;
}
@implementation OFLocale
@synthesize language = _language, territory = _territory, encoding = _encoding;
@synthesize decimalPoint = _decimalPoint;
+ (void)initialize
{
OFNumber *one, *two, *three, *four;
if (self != [OFLocale class])
return;
/* 1 is also used to denote a unary operator. */
one = [OFNumber numberWithUnsignedInt: 1];
two = [OFNumber numberWithUnsignedInt: 2];
three = [OFNumber numberWithUnsignedInt: 3];
four = [OFNumber numberWithUnsignedInt: 4];
operatorPrecedences = [[OFDictionary alloc] initWithKeysAndObjects:
@"==", two,
@"!=", two,
@"<", two,
@"<=", two,
@">", two,
@">=", two,
@"+", two,
@"%", two,
@"&&", three,
@"||", four,
@"!", one,
@"is_real", one,
nil];
}
+ (OFLocale *)currentLocale
{
return currentLocale;
}
+ (OFString *)language
{
return currentLocale.language;
}
+ (OFString *)territory
{
return currentLocale.territory;
}
+ (OFStringEncoding)encoding
{
return currentLocale.encoding;
}
+ (OFString *)decimalPoint
{
return currentLocale.decimalPoint;
}
#ifdef OF_HAVE_FILES
+ (void)addLanguageDirectory: (OFString *)path
{
[currentLocale addLanguageDirectory: path];
}
#endif
- (instancetype)init
{
self = [super init];
@try {
#ifndef OF_AMIGAOS
char *locale, *messagesLocale = NULL;
if (currentLocale != nil)
@throw [OFInitializationFailedException
exceptionWithClass: self.class];
_encoding = OFStringEncodingUTF8;
_decimalPoint = @".";
_localizedStrings = [[OFMutableArray alloc] init];
if ((locale = setlocale(LC_ALL, "")) != NULL)
_decimalPoint = [[OFString alloc]
initWithCString: localeconv()->decimal_point
encoding: _encoding];
# ifdef LC_MESSAGES
messagesLocale = setlocale(LC_MESSAGES, "");
# endif
if (messagesLocale == NULL)
messagesLocale = locale;
if (messagesLocale != NULL) {
void *pool = objc_autoreleasePoolPush();
parseLocale(messagesLocale, &_encoding,
&_language, &_territory);
[_language retain];
[_territory retain];
objc_autoreleasePoolPop(pool);
}
#else
void *pool = objc_autoreleasePoolPush();
char buffer[32];
struct Locale *locale;
/*
* Returns an empty string on MorphOS + libnix, but still
* applies it so that printf etc. work as expected.
*/
setlocale(LC_ALL, "");
# if defined(OF_MORPHOS)
if (GetVar("CODEPAGE", buffer, sizeof(buffer), 0) > 0) {
# elif defined(OF_AMIGAOS4)
if (GetVar("Charset", buffer, sizeof(buffer), 0) > 0) {
# else
if (0) {
# endif
OFStringEncoding ASCII = OFStringEncodingASCII;
@try {
_encoding = OFStringEncodingParseName(
[OFString stringWithCString: buffer
encoding: ASCII]);
} @catch (OFInvalidArgumentException *e) {
_encoding = OFStringEncodingISO8859_1;
}
} else
_encoding = OFStringEncodingISO8859_1;
/*
* Get it via localeconv() instead of from the Locale struct,
* to make sure we and printf etc. have the same expectations.
*/
_decimalPoint = [[OFString alloc]
initWithCString: localeconv()->decimal_point
encoding: _encoding];
_localizedStrings = [[OFMutableArray alloc] init];
if (GetVar("Language", buffer, sizeof(buffer), 0) > 0)
_language = [[OFString alloc]
initWithCString: buffer
encoding: _encoding];
if ((locale = OpenLocale(NULL)) != NULL) {
@try {
uint32_t territory;
size_t length;
territory =
OFToBigEndian32(locale->loc_CountryCode);
for (length = 0; length < 4; length++)
if (((char *)&territory)[length] == 0)
break;
_territory = [[OFString alloc]
initWithCString: (char *)&territory
encoding: _encoding
length: length];
} @finally {
CloseLocale(locale);
}
}
objc_autoreleasePoolPop(pool);
#endif
} @catch (id e) {
[self release];
@throw e;
}
currentLocale = self;
return self;
}
- (void)dealloc
{
[_language release];
[_territory release];
[_decimalPoint release];
[_localizedStrings release];
[super dealloc];
}
#ifdef OF_HAVE_FILES
- (void)addLanguageDirectory: (OFString *)path
{
void *pool;
OFString *mapPath, *language, *territory, *languageFile;
OFDictionary *map;
if (_language == nil)
return;
pool = objc_autoreleasePoolPush();
mapPath = [path stringByAppendingPathComponent: @"languages.json"];
@try {
map = [[OFString stringWithContentsOfFile: mapPath]
objectByParsingJSON];
} @catch (OFOpenItemFailedException *e) {
objc_autoreleasePoolPop(pool);
return;
}
language = _language.lowercaseString;
territory = _territory.lowercaseString;
if (territory == nil)
territory = @"";
languageFile = [[map objectForKey: language] objectForKey: territory];
if (languageFile == nil)
languageFile = [[map objectForKey: language] objectForKey: @""];
if (languageFile == nil) {
objc_autoreleasePoolPop(pool);
return;
}
languageFile = [path stringByAppendingPathComponent:
[languageFile stringByAppendingString: @".json"]];
[_localizedStrings addObject: [[OFString stringWithContentsOfFile:
languageFile] objectByParsingJSON]];
objc_autoreleasePoolPop(pool);
}
#endif
- (OFString *)localizedStringForID: (OFConstantString *)ID
fallback: (id)fallback, ...
{
OFString *ret;
va_list args;
va_start(args, fallback);
ret = [self localizedStringForID: ID
fallback: fallback
arguments: args];
va_end(args);
return ret;
}
- (OFString *)localizedStringForID: (OFConstantString *)ID
fallback: (id)fallback
arguments: (va_list)arguments
{
OFMutableString *ret = [OFMutableString string];
void *pool = objc_autoreleasePoolPush();
OFMutableDictionary *variables;
OFConstantString *name;
const char *UTF8String = NULL;
size_t last, UTF8StringLength;
int state = 0;
variables = [OFMutableDictionary dictionary];
while ((name = va_arg(arguments, OFConstantString *)) != nil)
[variables setObject: va_arg(arguments, id) forKey: name];
for (OFDictionary *strings in _localizedStrings) {
id string = [strings objectForKey: ID];
if (string == nil)
continue;
if ([string isKindOfClass: [OFArray class]])
string = evaluateArray(string, variables);
UTF8String = [string UTF8String];
UTF8StringLength = [string UTF8StringLength];
break;
}
if (UTF8String == NULL) {
if ([fallback isKindOfClass: [OFArray class]])
fallback = evaluateArray(fallback, variables);
UTF8String = [fallback UTF8String];
UTF8StringLength = [fallback UTF8StringLength];
}
state = 0;
last = 0;
for (size_t i = 0; i < UTF8StringLength; i++) {
switch (state) {
case 0:
if (UTF8String[i] == '%') {
[ret appendUTF8String: UTF8String + last
length: i - last];
last = i + 1;
state = 1;
}
break;
case 1:
if (UTF8String[i] == '[') {
last = i + 1;
state = 2;
} else {
[ret appendString: @"%"];
state = 0;
}
break;
case 2:
if (UTF8String[i] == ']') {
OFString *var = [OFString
stringWithUTF8String: UTF8String + last
length: i - last];
OFString *value = [variables objectForKey: var];
if (value != nil)
[ret appendString: value.description];
last = i + 1;
state = 0;
}
break;
}
}
switch (state) {
case 1:
[ret appendString: @"%"];
/* Explicit fall-through */
case 0:
[ret appendUTF8String: UTF8String + last
length: UTF8StringLength - last];
break;
}
objc_autoreleasePoolPop(pool);
[ret makeImmutable];
return ret;
}
@end