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NSStringHelper.m
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NSStringHelper.m
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// LimeChat is copyrighted free software by Satoshi Nakagawa <psychs AT limechat DOT net>.
// You can redistribute it and/or modify it under the terms of the GPL version 2 (see the file GPL.txt).
#import "NSStringHelper.h"
#import "UnicodeHelper.h"
#define LF 0xa
#define CR 0xd
@implementation NSString (NSStringHelper)
- (const UniChar*)getCharactersBuffer
{
NSUInteger len = self.length;
const UniChar* buffer = CFStringGetCharactersPtr((CFStringRef)self);
if (!buffer) {
NSMutableData* data = [NSMutableData dataWithLength:len * sizeof(UniChar)];
if (!data) return NULL;
[self getCharacters:[data mutableBytes] range:NSMakeRange(0, len)];
buffer = [data bytes];
if (!buffer) return NULL;
}
return buffer;
}
- (BOOL)isEqualNoCase:(NSString*)other
{
return [self caseInsensitiveCompare:other] == NSOrderedSame;
}
- (BOOL)contains:(NSString*)str
{
NSRange r = [self rangeOfString:str];
return r.location != NSNotFound;
}
- (BOOL)containsIgnoringCase:(NSString*)str
{
NSRange r = [self rangeOfString:str options:NSCaseInsensitiveSearch];
return r.location != NSNotFound;
}
- (int)findCharacter:(UniChar)c
{
return [self findCharacter:c start:0];
}
- (int)findCharacter:(UniChar)c start:(int)start
{
NSRange r = [self rangeOfCharacterFromSet:[NSCharacterSet characterSetWithRange:NSMakeRange(c, 1)] options:0 range:NSMakeRange(start, [self length] - start)];
if (r.location != NSNotFound) {
return r.location;
}
else {
return -1;
}
}
- (int)findString:(NSString*)str
{
NSRange r = [self rangeOfString:str];
if (r.location != NSNotFound) {
return r.location;
}
else {
return -1;
}
}
- (NSArray*)split:(NSString*)delimiter
{
NSMutableArray* ary = [NSMutableArray array];
int start = 0;
while (start < self.length) {
NSRange r = [self rangeOfString:delimiter options:0 range:NSMakeRange(start, self.length-start)];
if (r.location == NSNotFound) break;
[ary addObject:[self substringWithRange:NSMakeRange(start, r.location - start)]];
start = NSMaxRange(r);
}
if (start < self.length) {
[ary addObject:[self substringWithRange:NSMakeRange(start, self.length - start)]];
}
return ary;
}
- (NSArray*)splitIntoLines
{
int len = self.length;
const UniChar* buf = [self getCharactersBuffer];
if (!buf) {
return @[];
}
NSMutableArray* lines = [NSMutableArray array];
int start = 0;
for (int i=0; i<len; ++i) {
UniChar c = buf[i];
if (c == LF || c == CR) {
int pos = i;
if (c == CR && i+1 < len) {
UniChar next = buf[i+1];
if (next == LF) {
++i;
}
}
NSString* s = [[NSString alloc] initWithCharacters:buf+start length:pos - start];
[lines addObject:s];
[s release];
start = i + 1;
}
}
NSString* s = [[NSString alloc] initWithCharacters:buf+start length:len - start];
[lines addObject:s];
[s release];
return lines;
}
- (NSString*)trim
{
return [self stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}
- (BOOL)isNumericOnly
{
NSUInteger len = self.length;
if (!len) return NO;
const UniChar* buffer = [self getCharactersBuffer];
if (!buffer) return NO;
for (NSInteger i=0; i<len; ++i) {
UniChar c = buffer[i];
if (!(IsNumeric(c))) {
return NO;
}
}
return YES;
}
- (BOOL)isAlphaNumOnly
{
NSUInteger len = self.length;
if (!len) return NO;
const UniChar* buffer = [self getCharactersBuffer];
if (!buffer) return NO;
for (NSInteger i=0; i<len; ++i) {
UniChar c = buffer[i];
if (!(IsAlphaNum(c))) {
return NO;
}
}
return YES;
}
- (int)firstCharCodePoint
{
int len = self.length;
if (len == 0) return -1;
int c = [self characterAtIndex:0];
if (CFStringIsSurrogateHighCharacter(c)) {
if (len <= 1) return c;
int d = [self characterAtIndex:1];
if (CFStringIsSurrogateLowCharacter(d)) {
return (c - 0xd800) * 0x400 + (d - 0xdc00) + 0x10000;
}
else {
return -1;
}
}
return c;
}
- (int)lastCharCodePoint
{
int len = self.length;
if (len == 0) return -1;
int c = [self characterAtIndex:len-1];
if (CFStringIsSurrogateLowCharacter(c)) {
if (len <= 1) return c;
int d = [self characterAtIndex:len-2];
if (CFStringIsSurrogateHighCharacter(d)) {
return (d - 0xd800) * 0x400 + (c - 0xdc00) + 0x10000;
}
else {
return -1;
}
}
return c;
}
static int ctoi(unsigned char c)
{
if ('0' <= c && c <= '9') {
return c - '0';
}
else if ('a' <= c && c <= 'f') {
return c - 'a' + 10;
}
else if ('A' <= c && c <= 'F') {
return c - 'A' + 10;
}
else {
return 0;
}
}
static BOOL isUnicharDigit(unichar c)
{
return '0' <= c && c <= '9';
}
- (NSString*)safeUsername
{
int len = self.length;
const UniChar* buf = [self getCharactersBuffer];
UniChar dest[len];
int n = 0;
for (int i=0; i<len; i++) {
UniChar c = buf[i];
if (IsWordLetter(c)) {
dest[n++] = c;
}
else {
dest[n++] = '_';
}
}
return [[[NSString alloc] initWithCharacters:dest length:n] autorelease];
}
- (NSString*)safeFileName
{
NSString* s = [self stringByReplacingOccurrencesOfString:@"/" withString:@"_"];
return [s stringByReplacingOccurrencesOfString:@":" withString:@"_"];
}
- (NSString*)stripEffects
{
int len = self.length;
if (len == 0) return self;
const UniChar* src = [self getCharactersBuffer];
if (!src) return self;
UniChar buf[len];
int pos = 0;
for (int i=0; i<len; i++) {
unichar c = src[i];
if (c < 0x20) {
switch (c) {
case 0x2:
case 0xf:
case 0x16:
case 0x1f:
break;
case 0x3:
//
// colors
//
if (i+1 >= len) continue;
unichar d = src[i+1];
if (!isUnicharDigit(d)) continue;
i++;
if (i+1 >= len) continue;
unichar e = src[i+1];
if (!isUnicharDigit(e) && e != ',') continue;
i++;
BOOL comma = (e == ',');
if (!comma) {
if (i+1 >= len) continue;
unichar f = src[i+1];
if (f != ',') continue;
i++;
}
if (i+1 >= len) continue;
unichar g = src[i+1];
if (!isUnicharDigit(g)) continue;
i++;
if (i+1 >= len) continue;
unichar h = src[i+1];
if (!isUnicharDigit(h)) continue;
i++;
break;
default:
buf[pos++] = c;
break;
}
}
else {
buf[pos++] = c;
}
}
return [[[NSString alloc] initWithCharacters:buf length:pos] autorelease];
}
- (BOOL)isChannelName
{
if (self.length == 0) return NO;
UniChar c = [self characterAtIndex:0];
return c == '#' || c == '&' || c == '+' || c == '!';
}
- (BOOL)isModeChannelName
{
if (self.length == 0) return NO;
UniChar c = [self characterAtIndex:0];
return c == '#' || c == '&' || c == '!';
}
- (NSString*)canonicalName
{
return [self lowercaseString];
}
- (NSRange)rangeOfUrl
{
return [self rangeOfUrlStart:0];
}
- (NSRange)rangeOfUrlStart:(int)start
{
if (self.length <= start) {
return NSMakeRange(NSNotFound, 0);
}
static NSRegularExpression* regex = nil;
if (!regex) {
NSString* pattern = @"(?<![a-z0-9_])(https?|ftp|itms|afp)://([^\\s!\"#$\\&'()*+,/;<=>?\\[\\\\\\]\\^_`{|} 、,。.・…]+)(/[^\\s\"`<> 、,。.・…]*)?";
regex = [[NSRegularExpression alloc] initWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:NULL];
}
NSTextCheckingResult* result = [regex firstMatchInString:self options:0 range:NSMakeRange(start, self.length - start)];
if (!result || result.numberOfRanges < 4) {
return NSMakeRange(NSNotFound, 0);
}
NSRange r = [result rangeAtIndex:0];
// exclude non ASCII characters from URLs except for wikipedia
NSString* host = [[self substringWithRange:[result rangeAtIndex:2]] lowercaseString];
if (![host hasSuffix:@"wikipedia.org"]) {
NSRange pathRange = [result rangeAtIndex:3];
if (pathRange.length) {
static NSRegularExpression* pathRegex = nil;
if (!pathRegex) {
NSString* pathPattern = @"^/[a-zA-Z0-9\\-._~!#$%&'()*+,-./:;=?@\\[\\]]*";
pathRegex = [[NSRegularExpression alloc] initWithPattern:pathPattern options:0 error:NULL];
}
NSString* path = [self substringWithRange:pathRange];
NSRange newPathRange = [pathRegex rangeOfFirstMatchInString:path options:0 range:NSMakeRange(0, path.length)];
if (newPathRange.location != NSNotFound) {
int delta = pathRange.length - newPathRange.length;
if (delta > 0) {
r.length -= delta;
}
}
}
}
NSString* url = [self substringWithRange:r];
int len = url.length;
const UniChar* buf = [self getCharactersBuffer];
if (!buf) {
return NSMakeRange(NSNotFound, 0);
}
int paren = 0;
for (int i=0; i<len; ++i) {
UniChar c = buf[i];
if (c == ')') {
--paren;
}
else if (c == '(') {
++paren;
}
}
if (paren < 0) {
// too much ')'
for (int i=len-1; i>=0; --i) {
UniChar c = buf[i];
if (c == ')') {
++paren;
if (paren == 0) {
len = i;
r.length = len;
break;
}
}
else if (c == '(') {
--paren;
}
}
}
for (int i=len-1; i>=0; --i) {
UniChar c = buf[i];
if (c == '.' || c == ',' || c == '?') {
;
}
else {
len = i + 1;
r.length = len;
break;
}
}
return r;
}
- (NSRange)rangeOfAddress
{
return [self rangeOfAddressStart:0];
}
- (NSRange)rangeOfAddressStart:(int)start
{
int len = self.length;
if (len <= start) {
return NSMakeRange(NSNotFound, 0);
}
static NSRegularExpression* regex = nil;
if (!regex) {
NSString* pattern = @"([a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])?\\.)([a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])?\\.)+[a-zA-Z]{2,6}|([a-f0-9]{0,4}:){7}[a-f0-9]{0,4}|([0-9]{1,3}\\.){3}[0-9]{1,3}";
regex = [[NSRegularExpression alloc] initWithPattern:pattern options:0 error:NULL];
}
NSRange r = [regex rangeOfFirstMatchInString:self options:0 range:NSMakeRange(start, self.length - start)];
if (r.location == NSNotFound) {
return NSMakeRange(NSNotFound, 0);
}
int prev = r.location - 1;
if (0 <= prev && prev < len) {
// check previous character
UniChar c = [self characterAtIndex:prev];
if (IsWordLetter(c)) {
return [self rangeOfAddressStart:NSMaxRange(r)];
}
}
int next = NSMaxRange(r);
if (next < len) {
// check next character
UniChar c = [self characterAtIndex:next];
if (IsWordLetter(c)) {
return [self rangeOfAddressStart:NSMaxRange(r)];
}
}
return r;
}
- (NSRange)rangeOfChannelName
{
return [self rangeOfChannelNameStart:0];
}
- (NSRange)rangeOfChannelNameStart:(int)start
{
int len = self.length;
if (len <= start) {
return NSMakeRange(NSNotFound, 0);
}
static NSRegularExpression* regex = nil;
if (!regex) {
NSString* pattern = @"(?<![a-zA-Z0-9_])[#\\&][^ \\t, ]+";
regex = [[NSRegularExpression alloc] initWithPattern:pattern options:0 error:NULL];
}
NSRange r = [regex rangeOfFirstMatchInString:self options:0 range:NSMakeRange(start, self.length - start)];
if (r.location == NSNotFound) {
return NSMakeRange(NSNotFound, 0);
}
int prev = r.location - 1;
if (0 <= prev && prev < len) {
// check previous character
UniChar c = [self characterAtIndex:prev];
if (IsWordLetter(c)) {
return [self rangeOfAddressStart:NSMaxRange(r)];
}
}
int next = NSMaxRange(r);
if (next < len) {
// check next character
UniChar c = [self characterAtIndex:next];
if (IsWordLetter(c)) {
return [self rangeOfAddressStart:NSMaxRange(r)];
}
}
return r;
}
- (NSString*)encodeURIComponent
{
if (!self.length) return @"";
static const char* characters = "0123456789ABCDEF";
const char* src = [self UTF8String];
if (!src) return @"";
NSUInteger len = [self lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
char buf[len*4];
char* dest = buf;
for (NSInteger i=len-1; i>=0; --i) {
unsigned char c = *src++;
if (IsWordLetter(c) || c == '-' || c == '.' || c == '~') {
*dest++ = c;
}
else {
*dest++ = '%';
*dest++ = characters[c / 16];
*dest++ = characters[c % 16];
}
}
return [[[NSString alloc] initWithBytes:buf length:dest - buf encoding:NSASCIIStringEncoding] autorelease];
}
- (NSString*)encodeURIFragment
{
if (!self.length) return @"";
static const char* characters = "0123456789ABCDEF";
const char* src = [self UTF8String];
if (!src) return @"";
NSUInteger len = [self lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
char buf[len*4];
char* dest = buf;
for (NSInteger i=len-1; i>=0; --i) {
unsigned char c = *src++;
if (IsWordLetter(c)
|| c == '#'
|| c == '%'
|| c == '&'
|| c == '+'
|| c == ','
|| c == '-'
|| c == '.'
|| c == '/'
|| c == ':'
|| c == ';'
|| c == '='
|| c == '?'
|| c == '@'
|| c == '~') {
*dest++ = c;
}
else {
*dest++ = '%';
*dest++ = characters[c / 16];
*dest++ = characters[c % 16];
}
}
return [[[NSString alloc] initWithBytes:buf length:dest - buf encoding:NSASCIIStringEncoding] autorelease];
}
+ (NSString*)bundleString:(NSString*)key
{
return [[[NSBundle mainBundle] infoDictionary] objectForKey:key];
}
@end
@implementation NSMutableString (NSMutableStringHelper)
- (NSString*)getToken
{
static NSCharacterSet* spaceSet = nil;
if (!spaceSet) {
spaceSet = [[NSCharacterSet characterSetWithCharactersInString:@" "] retain];
}
NSRange r = [self rangeOfCharacterFromSet:spaceSet];
if (r.location != NSNotFound) {
NSString* result = [self substringToIndex:r.location];
int len = [self length];
int pos = r.location + 1;
while (pos < len && [self characterAtIndex:pos] == ' ') {
pos++;
}
[self deleteCharactersInRange:NSMakeRange(0, pos)];
return result;
}
NSString* result = [[self copy] autorelease];
[self setString:@""];
return result;
}
- (NSString*)getIgnoreToken
{
BOOL useAnchor = NO;
UniChar anchor;
BOOL escaped = NO;
int len = [self length];
for (int i=0; i<len; ++i) {
UniChar c = [self characterAtIndex:i];
if (i == 0) {
if (c == '/') {
useAnchor = YES;
anchor = '/';
continue;
}
else if (c == '"') {
useAnchor = YES;
anchor = '"';
continue;
}
}
if (escaped) {
escaped = NO;
}
else if (c == '\\') {
escaped = YES;
}
else if ((useAnchor && c == anchor) || (!useAnchor && c == ' ')) {
if (useAnchor) {
++i;
}
NSString* result = [self substringToIndex:i];
int right;
for (right=i+1; right<len; ++right) {
UniChar c = [self characterAtIndex:right];
if (c != ' ') {
break;
}
}
if (len <= right) {
right = len;
}
[self deleteCharactersInRange:NSMakeRange(0, right)];
return result;
}
}
NSString* result = [[self copy] autorelease];
[self setString:@""];
return result;
}
@end