// // $Id$ // // SPStringAdditions.m // sequel-pro // // Created by Stuart Connolly (stuconnolly.com) on Jan 28, 2009 // Copyright (c) 2009 Stuart Connolly. All rights reserved. // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // // More info at <http://code.google.com/p/sequel-pro/> #import "SPStringAdditions.h" #import "RegexKitLite.h" @interface NSString (Private) - (int)smallestOf:(int)a andOf:(int)b andOf:(int)c; @end @implementation NSString (SPStringAdditions) /* * Returns a human readable version string of the supplied byte size. */ + (NSString *)stringForByteSize:(int)byteSize { float size = byteSize; NSNumberFormatter *numberFormatter = [[[NSNumberFormatter alloc] init] autorelease]; [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; if (size < 1023) { [numberFormatter setFormat:@"#,##0 B"]; return [numberFormatter stringFromNumber:[NSNumber numberWithInt:size]]; } size = (size / 1024); if (size < 1023) { [numberFormatter setFormat:@"#,##0.0 KB"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:size]]; } size = (size / 1024); if (size < 1023) { [numberFormatter setFormat:@"#,##0.0 MB"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:size]]; } size = (size / 1024); [numberFormatter setFormat:@"#,##0.0 GB"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:size]]; } // ------------------------------------------------------------------------------- // stringForTimeInterval: // // Returns a human readable version string of the supplied time interval. // ------------------------------------------------------------------------------- + (NSString *)stringForTimeInterval:(float)timeInterval { NSNumberFormatter *numberFormatter = [[[NSNumberFormatter alloc] init] autorelease]; [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; // For time periods of less than one millisecond, display a localised "< 0.1 ms" if (timeInterval < 0.0001) { [numberFormatter setFormat:@"< #,##0.0 ms"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:0.1]]; } if (timeInterval < 0.1) { timeInterval = (timeInterval * 1000); [numberFormatter setFormat:@"#,##0.0 ms"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } if (timeInterval < 1) { timeInterval = (timeInterval * 1000); [numberFormatter setFormat:@"#,##0 ms"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } if (timeInterval < 10) { [numberFormatter setFormat:@"#,##0.00 s"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } if (timeInterval < 100) { [numberFormatter setFormat:@"#,##0.0 s"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } if (timeInterval < 300) { [numberFormatter setFormat:@"#,##0 s"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } if (timeInterval < 3600) { timeInterval = (timeInterval / 60); [numberFormatter setFormat:@"#,##0 min"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } timeInterval = (timeInterval / 3600); [numberFormatter setFormat:@"#,##0 hours"]; return [numberFormatter stringFromNumber:[NSNumber numberWithFloat:timeInterval]]; } // ------------------------------------------------------------------------------- // backtickQuotedString // // Returns the string quoted with backticks as required for MySQL identifiers // eg.: tablename => `tablename` // my`table => `my``table` // ------------------------------------------------------------------------------- - (NSString *)backtickQuotedString { // mutableCopy automatically retains the returned string, so don't forget to release it later... NSMutableString *workingCopy = [self mutableCopy]; // First double all backticks in the string to escape them // I don't want to use "stringByReplacingOccurrencesOfString:withString:" because it's only available in 10.5 [workingCopy replaceOccurrencesOfString: @"`" withString: @"``" options: NSLiteralSearch range: NSMakeRange(0, [workingCopy length]) ]; // Add the quotes around the string NSString *quotedString = [NSString stringWithFormat: @"`%@`", workingCopy]; [workingCopy release]; return quotedString; } // ------------------------------------------------------------------------------- // createViewSyntaxPrettifier // // Returns a 'CREATE VIEW SYNTAX' string a bit more readable // If the string doesn't match it returns the unchanged string. // ------------------------------------------------------------------------------- - (NSString *)createViewSyntaxPrettifier { NSRange searchRange = NSMakeRange(0, [self length]); NSRange matchedRange; NSError *err = NULL; NSMutableString *tblSyntax = [NSMutableString stringWithCapacity:[self length]]; NSString * re = @"(.*?) AS select (.*?) (from.*)"; // create view syntax matchedRange = [self rangeOfRegex:re options:(RKLMultiline|RKLDotAll) inRange:searchRange capture:1 error:&err]; if(!matchedRange.length || matchedRange.length > [self length]) return([self description]); [tblSyntax appendString:[self substringWithRange:matchedRange]]; [tblSyntax appendString:@"\nAS select\n "]; // match all column definitions, split them by ',', and rejoin them by '\n' matchedRange = [self rangeOfRegex:re options:(RKLMultiline|RKLDotAll) inRange:searchRange capture:2 error:&err]; if(!matchedRange.length || matchedRange.length > [self length]) return([self description]); [tblSyntax appendString: [[[self substringWithRange:matchedRange] componentsSeparatedByString:@"`,`"] componentsJoinedByString:@"`,\n `"]]; // from ... at a new line matchedRange = [self rangeOfRegex:re options:(RKLMultiline|RKLDotAll) inRange:searchRange capture:3 error:&err]; if(!matchedRange.length || matchedRange.length > [self length]) return([self description]); [tblSyntax appendString:@"\n"]; [tblSyntax appendString:[self substringWithRange:matchedRange]]; // where clause at a new line if given [tblSyntax replaceOccurrencesOfString:@" where (" withString:@"\nwhere (" options:NSLiteralSearch range:NSMakeRange(0, [tblSyntax length])]; return(tblSyntax); } // ------------------------------------------------------------------------------- // lineRangesForRange // // Returns an array of serialised NSRanges, each representing a line within the string // which is at least partially covered by the NSRange supplied. // Each line includes the line termination character(s) for the line. As per // lineRangeForRange, lines are split by CR, LF, CRLF, U+2028 (Unicode line separator), // or U+2029 (Unicode paragraph separator). // ------------------------------------------------------------------------------- - (NSArray *)lineRangesForRange:(NSRange)aRange { NSMutableArray *lineRangesArray = [NSMutableArray array]; NSRange currentLineRange; // Check that the range supplied is valid - if not return an empty array. if (aRange.location == NSNotFound || aRange.location + aRange.length > [self length]) return lineRangesArray; // Get the range of the first string covered by the specified range, and add it to the array currentLineRange = [self lineRangeForRange:NSMakeRange(aRange.location, 0)]; [lineRangesArray addObject:NSStringFromRange(currentLineRange)]; // Loop through until the line end matches or surpasses the end of the specified range while (currentLineRange.location + currentLineRange.length < aRange.location + aRange.length) { currentLineRange = [self lineRangeForRange:NSMakeRange(currentLineRange.location + currentLineRange.length, 0)]; [lineRangesArray addObject:NSStringFromRange(currentLineRange)]; } // Return the constructed array of ranges return lineRangesArray; } #if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5 /* * componentsSeparatedByCharactersInSet: * Credit - Greg Hulands <ghulands@mac.com> * Needed for 10.4+ compatibility */ - (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)set // 10.5 adds this to NSString, but we are 10.4+ { NSMutableArray *result = [NSMutableArray array]; NSScanner *scanner = [NSScanner scannerWithString:self]; NSString *chunk = nil; [scanner setCharactersToBeSkipped:nil]; BOOL sepFound = [scanner scanCharactersFromSet:set intoString:(NSString **)nil]; // skip any preceding separators if (sepFound) { // if initial separator, start with empty component [result addObject:@""]; } while ([scanner scanUpToCharactersFromSet:set intoString:&chunk]) { [result addObject:chunk]; sepFound = [scanner scanCharactersFromSet: set intoString: (NSString **) nil]; } if (sepFound) { // if final separator, end with empty component [result addObject: @""]; } result = [result copy]; return [result autorelease]; } #endif - (NSString *)stringByRemovingCharactersInSet:(NSCharacterSet*) charSet options:(unsigned) mask { NSRange range; NSMutableString* newString = [NSMutableString string]; unsigned len = [self length]; mask &= ~NSBackwardsSearch; range = NSMakeRange (0, len); while (range.length) { NSRange substringRange; unsigned pos = range.location; range = [self rangeOfCharacterFromSet:charSet options:mask range:range]; if (range.location == NSNotFound) range = NSMakeRange (len, 0); substringRange = NSMakeRange (pos, range.location - pos); [newString appendString:[self substringWithRange:substringRange]]; range.location += range.length; range.length = len - range.location; } return newString; } - (NSString *)stringByRemovingCharactersInSet:(NSCharacterSet*) charSet { return [self stringByRemovingCharactersInSet:charSet options:0]; } // calculate the distance between two string case-insensitively - (float)levenshteinDistanceWithWord:(NSString *)stringB { // normalize strings NSString * stringA = [NSString stringWithString: self]; [stringA stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; [stringB stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; stringA = [stringA lowercaseString]; stringB = [stringB lowercaseString]; int k, i, j, cost, * d, distance; int n = [stringA length]; int m = [stringB length]; if( n++ != 0 && m++ != 0 ) { d = malloc( sizeof(int) * m * n ); for( k = 0; k < n; k++) d[k] = k; for( k = 0; k < m; k++) d[ k * n ] = k; for( i = 1; i < n; i++ ) for( j = 1; j < m; j++ ) { if( [stringA characterAtIndex: i-1] == [stringB characterAtIndex: j-1] ) cost = 0; else cost = 1; d[ j * n + i ] = [self smallestOf: d [ (j - 1) * n + i ] + 1 andOf: d[ j * n + i - 1 ] + 1 andOf: d[ (j - 1) * n + i -1 ] + cost ]; } distance = d[ n * m - 1 ]; free( d ); return distance; } return 0.0; } // return the minimum of a, b and c - (int)smallestOf:(int)a andOf:(int)b andOf:(int)c { int min = a; if ( b < min ) min = b; if( c < min ) min = c; return min; } @end