// // $Id$ // // SPSQLParsing.m // sequel-pro // // Created by Rowan Beentje on 18/01/2009. // Copyright 2009 Rowan Beentje. 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 #import "SPSQLParser.h" #import "RegexKitLite.h" /* * Include all the extern variables and prototypes required for flex (used for syntax highlighting) */ #import "SPSQLTokenizer.h" extern int tolex(); extern int yyuoffset, yyuleng; typedef struct to_buffer_state *TO_BUFFER_STATE; void to_switch_to_buffer(TO_BUFFER_STATE); TO_BUFFER_STATE to_scan_string (const char *); /* * Please see the header files for a general description of the purpose of this class, * and increased overview detail for the functions below. */ @implementation SPSQLParser : NSMutableString /* * Removes comments within the current string, trimming "#", "--[/s]", and "/* * /" style strings. */ - (void) deleteComments { long currentStringIndex, commentEndIndex, quotedStringEndIndex; unichar currentCharacter; long stringLength = [string length]; // Walk along the string, processing characters. for (currentStringIndex = 0; currentStringIndex < stringLength; currentStringIndex++) { currentCharacter = [string characterAtIndex:currentStringIndex]; switch (currentCharacter) { // When quote characters are encountered walk to the end of the quoted string. case '\'': case '"': case '`': quotedStringEndIndex = [self endIndexOfStringQuotedByCharacter:currentCharacter startingAtIndex:currentStringIndex+1]; if (quotedStringEndIndex == NSNotFound) { return; } currentStringIndex = quotedStringEndIndex; break; // For comments starting "--[\s]", ensure the start syntax is valid before proceeding. case '-': if (stringLength < currentStringIndex + 2) break; if ([string characterAtIndex:currentStringIndex+1] != '-') break; if (![[NSCharacterSet whitespaceCharacterSet] characterIsMember:[string characterAtIndex:currentStringIndex+2]]) break; commentEndIndex = [self endIndexOfCommentOfType:SPDoubleDashComment startingAtIndex:currentStringIndex]; // Remove the comment [self deleteCharactersInRange:NSMakeRange(currentStringIndex, commentEndIndex - currentStringIndex + 1)]; stringLength -= commentEndIndex - currentStringIndex + 1; currentStringIndex--; break; case '#': commentEndIndex = [self endIndexOfCommentOfType:SPHashComment startingAtIndex:currentStringIndex]; // Remove the comment [self deleteCharactersInRange:NSMakeRange(currentStringIndex, commentEndIndex - currentStringIndex + 1)]; stringLength -= commentEndIndex - currentStringIndex + 1; currentStringIndex--; break; // For comments starting "/*", ensure the start syntax is valid before proceeding. case '/': if (stringLength < currentStringIndex + 1) break; if ([string characterAtIndex:currentStringIndex+1] != '*') break; commentEndIndex = [self endIndexOfCommentOfType:SPCStyleComment startingAtIndex:currentStringIndex]; // Remove the comment [self deleteCharactersInRange:NSMakeRange(currentStringIndex, commentEndIndex - currentStringIndex + 1)]; stringLength -= commentEndIndex - currentStringIndex + 1; currentStringIndex--; break; } } } /* * Removes quotes surrounding the string if present, and un-escapes internal occurrences of the quote character before returning. */ - (NSString *) unquotedString { NSMutableString *returnString; long stringEndIndex; unichar quoteCharacter; if (![string length]) return nil; // If the first character is not a quote character, return the entire string. quoteCharacter = [string characterAtIndex:0]; if (quoteCharacter != '`' && quoteCharacter != '"' && quoteCharacter != '\'') { return [NSString stringWithString:string]; } // Get the end of the string stringEndIndex = [self endIndexOfStringQuotedByCharacter:quoteCharacter startingAtIndex:1]; if (stringEndIndex == NSNotFound) { return [NSString stringWithString:string]; } // Trim the string appropriately returnString = [NSMutableString stringWithString:[string substringWithRange:NSMakeRange(1, stringEndIndex-1)]]; // Remove escaped characters and escaped strings as appropriate if (quoteCharacter == '`' || quoteCharacter == '"' || quoteCharacter == '\'') { [returnString replaceOccurrencesOfString:[NSString stringWithFormat:@"%C%C", quoteCharacter, quoteCharacter] withString:[NSString stringWithFormat:@"%C", quoteCharacter] options:0 range:NSMakeRange(0, [returnString length])]; } if (quoteCharacter == '"') { [returnString replaceOccurrencesOfString:@"\\\"" withString:@"\"" options:0 range:NSMakeRange(0, [returnString length])]; [returnString replaceOccurrencesOfString:@"\\\\" withString:@"\\" options:0 range:NSMakeRange(0, [returnString length])]; } else if (quoteCharacter == '\'') { [returnString replaceOccurrencesOfString:@"\\'" withString:@"'" options:0 range:NSMakeRange(0, [returnString length])]; [returnString replaceOccurrencesOfString:@"\\\\" withString:@"\\" options:0 range:NSMakeRange(0, [returnString length])]; } return returnString; } /* * Removes characters from the string up to the first occurrence of the supplied character. */ - (BOOL) trimToCharacter:(unichar)character inclusively:(BOOL)inclusive { return [self trimToCharacter:character inclusively:inclusive ignoringQuotedStrings:YES]; } /* * As trimToCharacter: ..., but allows control over whether characters within quoted * strings are ignored. */ - (BOOL) trimToCharacter:(unichar)character inclusively:(BOOL)inclusive ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long stringIndex; // Get the first occurrence of the specified character, returning NO if not found stringIndex = [self firstOccurrenceOfCharacter:character ignoringQuotedStrings:ignoreQuotedStrings]; if (stringIndex == NSNotFound) return NO; // If it has been found, trim the string appropriately and return YES [self deleteCharactersInRange:NSMakeRange(0, stringIndex + (inclusive?1:0))]; return YES; } /* * Returns an NSString containing characters from the string up to the first occurrence of the supplied character. */ - (NSString *) stringToCharacter:(unichar)character inclusively:(BOOL)inclusive { return [self stringToCharacter:character inclusively:inclusive ignoringQuotedStrings:YES]; } /* * As stringToCharacter: ..., but allows control over whether characters within quoted strings * are ignored. */ - (NSString *) stringToCharacter:(unichar)character inclusively:(BOOL)inclusive ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long stringIndex; // Get the first occurrence of the specified character, returning nil if not found stringIndex = [self firstOccurrenceOfCharacter:character ignoringQuotedStrings:ignoreQuotedStrings]; if (stringIndex == NSNotFound) return nil; // If it has been found, return the appropriate string range return [string substringWithRange:NSMakeRange(0, stringIndex + (inclusive?1:0))]; } /* * Returns an NSString containing characters from the string up to the first occurrence of the supplied * character, also removing them from the string. */ - (NSString *) trimAndReturnStringToCharacter:(unichar)character trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn { return [self trimAndReturnStringToCharacter:character trimmingInclusively:inclusiveTrim returningInclusively:inclusiveReturn ignoringQuotedStrings:YES]; } /* * As trimAndReturnStringToCharacter: ..., but allows control over whether characters within quoted * strings are ignored. */ - (NSString *) trimAndReturnStringToCharacter:(unichar)character trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long stringIndex; NSString *resultString; // Get the first occurrence of the specified character, returning nil if it could not be found stringIndex = [self firstOccurrenceOfCharacter:character ignoringQuotedStrings:ignoreQuotedStrings]; if (stringIndex == NSNotFound) return nil; // Select the appropriate string range, truncate the current string, and return the selected string resultString = [NSString stringWithString:[string substringWithRange:NSMakeRange(0, stringIndex + (inclusiveReturn?1:0))]]; [self deleteCharactersInRange:NSMakeRange(0, stringIndex + (inclusiveTrim?1:0))]; return resultString; } /* * Returns characters from the string up to and from the first occurrence of the supplied opening character * to the appropriate occurrence of the supplied closing character. "inclusively" controls whether the supplied * characters should also be returned. */ - (NSString *) stringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter inclusively:(BOOL)inclusive { return [self stringFromCharacter:fromCharacter toCharacter:toCharacter inclusively:inclusive skippingBrackets:NO ignoringQuotedStrings:YES]; } /* * As stringFromCharacter: toCharacter: ..., but allows control over whether to skip * over bracket-enclosed characters, as in subqueries, enums, definitions or groups */ - (NSString *) stringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter inclusively:(BOOL)inclusive skippingBrackets:(BOOL)skipBrackets { return [self stringFromCharacter:fromCharacter toCharacter:toCharacter inclusively:inclusive skippingBrackets:skipBrackets ignoringQuotedStrings:YES]; } /* * As stringFromCharacter: toCharacter: ..., but allows control over whether characters within quoted * strings are ignored. */ - (NSString *) stringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter inclusively:(BOOL)inclusive ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { return [self stringFromCharacter:fromCharacter toCharacter:toCharacter inclusively:inclusive skippingBrackets:NO ignoringQuotedStrings:ignoreQuotedStrings]; } /* * As stringFromCharacter: toCharacter: ..., but allows control over both bracketing and quoting. */ - (NSString *) stringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter inclusively:(BOOL)inclusive skippingBrackets:(BOOL)skipBrackets ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long fromCharacterIndex, toCharacterIndex; // Look for the first occurrence of the from: character fromCharacterIndex = [self firstOccurrenceOfCharacter:fromCharacter afterIndex:-1 skippingBrackets:skipBrackets ignoringQuotedStrings:ignoreQuotedStrings]; if (fromCharacterIndex == NSNotFound) return nil; // Look for the first/balancing occurrence of the to: character toCharacterIndex = [self firstOccurrenceOfCharacter:toCharacter afterIndex:fromCharacterIndex skippingBrackets:skipBrackets ignoringQuotedStrings:ignoreQuotedStrings]; if (toCharacterIndex == NSNotFound) return nil; // Return the correct part of the string. return [string substringWithRange:NSMakeRange(fromCharacterIndex + (inclusive?0:1), toCharacterIndex + (inclusive?1:-1) - fromCharacterIndex)]; } /* * As stringFromCharacter: toCharacter: ..., but also trims the string up to the "to" character and * up to or including the "from" character, depending on whether "trimmingInclusively" is set. */ - (NSString *) trimAndReturnStringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn { return [self trimAndReturnStringFromCharacter:fromCharacter toCharacter:toCharacter trimmingInclusively:inclusiveTrim returningInclusively:inclusiveReturn skippingBrackets:NO ignoringQuotedStrings:YES]; } /* * As trimAndReturnStringFromCharacter: toCharacter: ..., but allows control over whether to * skip over bracket-enclosed characters, as in subqueries, enums, definitions or groups. */ - (NSString *) trimAndReturnStringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn skippingBrackets:(BOOL)skipBrackets { return [self trimAndReturnStringFromCharacter:fromCharacter toCharacter:toCharacter trimmingInclusively:inclusiveTrim returningInclusively:inclusiveReturn skippingBrackets:skipBrackets ignoringQuotedStrings:YES]; } /* * As trimAndReturnStringFromCharacter: toCharacter: ..., but allows control over whether characters * within quoted strings are ignored. */ - (NSString *) trimAndReturnStringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { return [self trimAndReturnStringFromCharacter:fromCharacter toCharacter:toCharacter trimmingInclusively:inclusiveTrim returningInclusively:inclusiveReturn skippingBrackets:NO ignoringQuotedStrings:ignoreQuotedStrings]; } /* * As trimAndReturnStringFromCharacter: toCharacter: ..., but allows control over both bracketing * and quoting. */ - (NSString *) trimAndReturnStringFromCharacter:(unichar)fromCharacter toCharacter:(unichar)toCharacter trimmingInclusively:(BOOL)inclusiveTrim returningInclusively:(BOOL)inclusiveReturn skippingBrackets:(BOOL)skipBrackets ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long fromCharacterIndex, toCharacterIndex; NSString *resultString; // Look for the first occurrence of the from: character fromCharacterIndex = [self firstOccurrenceOfCharacter:fromCharacter afterIndex:-1 skippingBrackets:skipBrackets ignoringQuotedStrings:ignoreQuotedStrings]; if (fromCharacterIndex == NSNotFound) return nil; // Look for the first/balancing occurrence of the to: character toCharacterIndex = [self firstOccurrenceOfCharacter:toCharacter afterIndex:fromCharacterIndex skippingBrackets:skipBrackets ignoringQuotedStrings:ignoreQuotedStrings]; if (toCharacterIndex == NSNotFound) return nil; // Select the correct part of the string, truncate the current string, and return the selected string. resultString = [string substringWithRange:NSMakeRange(fromCharacterIndex + (inclusiveReturn?0:1), toCharacterIndex + (inclusiveReturn?1:-1) - fromCharacterIndex)]; [self deleteCharactersInRange:NSMakeRange(fromCharacterIndex + (inclusiveTrim?0:1), toCharacterIndex + (inclusiveTrim?1:-1) - fromCharacterIndex)]; return resultString; } /* * Split a string on the boundaries formed by the supplied character, returning an array of strings. */ - (NSArray *) splitStringByCharacter:(unichar)character { return [self splitStringByCharacter:character skippingBrackets:NO ignoringQuotedStrings:YES]; } /* * As splitStringByCharacter: ..., but allows control over whether to skip over bracket-enclosed * characters, as in subqueries, enums, definitions or groups. */ - (NSArray *) splitStringByCharacter:(unichar)character skippingBrackets:(BOOL)skipBrackets { return [self splitStringByCharacter:character skippingBrackets:skipBrackets ignoringQuotedStrings:YES]; } /* * As splitStringByCharacter:, but allows control over whether characters * within quoted strings are ignored. */ - (NSArray *) splitStringByCharacter:(unichar)character ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { return [self splitStringByCharacter:character skippingBrackets:NO ignoringQuotedStrings:ignoreQuotedStrings]; } /* * As splitStringByCharacter: ..., but allows control over both bracketing and quoting. */ - (NSArray *) splitStringByCharacter:(unichar)character skippingBrackets:(BOOL)skipBrackets ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { NSMutableArray *resultsArray = [NSMutableArray array]; long stringIndex = -1, nextIndex = 0; // Walk through the string finding the character to split by, and add all strings to the array. while (1) { nextIndex = [self firstOccurrenceOfCharacter:character afterIndex:stringIndex skippingBrackets:skipBrackets ignoringQuotedStrings:ignoreQuotedStrings]; if (nextIndex == NSNotFound) { break; } [resultsArray addObject:[string substringWithRange:NSMakeRange(stringIndex+1, nextIndex - stringIndex - 1)]]; stringIndex = nextIndex; } // Add the end of the string after the previously matched character where appropriate. if (stringIndex + 1 < [string length]) { [resultsArray addObject:[string substringWithRange:NSMakeRange(stringIndex+1, [string length] - stringIndex - 1)]]; } return resultsArray; } /* * As splitStringByCharacter: ..., but allows control over both bracketing and quoting. */ - (NSArray *) splitSqlStringByCharacter:(unichar)character { NSMutableArray *resultsArray = [NSMutableArray arrayWithCapacity:2000]; long stringIndex = -1, nextIndex = 0; int queryLength; // these delimiter variables will be set in firstOccurrenceOfCharacter: delimiter = nil; delimiterLength = 0; // is delimiter length minus 1 charIsDelimiter = YES; // flag if passed character is the current delimiter isDelimiterCommand = NO; IMP firstOccOfChar = [self methodForSelector:@selector(firstOccurrenceInSqlOfCharacter:afterIndex:skippingBrackets:ignoringQuotedStrings:)]; IMP subString = [string methodForSelector:@selector(substringWithRange:)]; // Walk through the string finding the character to split by, and add all strings to the array. while (1) { nextIndex = (long)(*firstOccOfChar)(self, @selector(firstOccurrenceInSqlOfCharacter:afterIndex:skippingBrackets:ignoringQuotedStrings:), character, stringIndex, NO, YES); if (nextIndex == NSNotFound) break; stringIndex += 1; // Ignore a delimiter command and check range length queryLength = nextIndex - stringIndex - delimiterLength; if(!isDelimiterCommand && queryLength > 0) [resultsArray addObject:(NSString *)(*subString)(string, @selector(substringWithRange:), NSMakeRange(stringIndex, queryLength))]; if(isDelimiterCommand) isDelimiterCommand = NO; stringIndex = nextIndex; } // Add the end of the string after the previously matched character where appropriate. if (stringIndex + 1 < [string length]) [resultsArray addObject:[string substringFromIndex:stringIndex + 1]]; return resultsArray; } /* * As splitStringByCharacter: but it returns only the ranges of queries as NSValues */ - (NSArray *) splitSqlStringIntoRangesByCharacter:(unichar)character { NSMutableArray *resultsArray = [NSMutableArray arrayWithCapacity:2000]; long stringIndex = -1, nextIndex = 0; int queryLength; // these delimiter variables will be set in firstOccurrenceOfCharacter: delimiter = nil; delimiterLength = 0; // is delimiter length minus 1 charIsDelimiter = YES; // flag if passed character is the current delimiter isDelimiterCommand = NO; IMP firstOccOfChar = [self methodForSelector:@selector(firstOccurrenceInSqlOfCharacter:afterIndex:skippingBrackets:ignoringQuotedStrings:)]; // Walk through the string finding the character to split by, and add all strings to the array. while (1) { nextIndex = (long)(*firstOccOfChar)(self, @selector(firstOccurrenceInSqlOfCharacter:afterIndex:skippingBrackets:ignoringQuotedStrings:), character, stringIndex, NO, YES); if (nextIndex == NSNotFound) break; stringIndex += 1; // Ignore a delimiter command and check range length queryLength = nextIndex - stringIndex - delimiterLength; if(!isDelimiterCommand && queryLength > 0) [resultsArray addObject:[NSValue valueWithRange:NSMakeRange(stringIndex, queryLength)]]; if(isDelimiterCommand) isDelimiterCommand = NO; stringIndex = nextIndex; } // Add the end of the string after the previously matched character where appropriate. if (stringIndex + 1 < [string length]) [resultsArray addObject:[NSValue valueWithRange:NSMakeRange(stringIndex + 1, [string length] - stringIndex - 1)]]; return resultsArray; } /* * A method intended for use by the functions above. */ - (long) firstOccurrenceOfCharacter:(unichar)character ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { return [self firstOccurrenceOfCharacter:character afterIndex:-1 skippingBrackets:NO ignoringQuotedStrings:ignoreQuotedStrings]; } /* * A method intended for use by the functions above. */ - (long) firstOccurrenceOfCharacter:(unichar)character afterIndex:(long)startIndex ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { return [self firstOccurrenceOfCharacter:character afterIndex:startIndex skippingBrackets:NO ignoringQuotedStrings:ignoreQuotedStrings]; } - (long) firstOccurrenceOfCharacter:(unichar)character afterIndex:(long)startIndex skippingBrackets:(BOOL)skipBrackets ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long currentStringIndex, quotedStringEndIndex; unichar currentCharacter; long stringLength = [string length]; int bracketingLevel = 0; // Cache frequently used selectors, avoiding dynamic binding overhead IMP charAtIndex = [self methodForSelector:@selector(charAtIndex:)]; IMP endIndex = [self methodForSelector:@selector(endIndexOfStringQuotedByCharacter:startingAtIndex:)]; // Sanity check inputs if (startIndex < -1) startIndex = -1; // Walk along the string, processing characters for (currentStringIndex = startIndex + 1; currentStringIndex < stringLength; currentStringIndex++) { currentCharacter = (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex); // Check for the ending character, and if it has been found and quoting/brackets is valid, return. if (currentCharacter == character) { if (!skipBrackets || bracketingLevel <= 0) { return currentStringIndex; } } // Process strings and comments as appropriate switch (currentCharacter) { // When quote characters are encountered and strings are not being ignored, walk to the end of the quoted string. case '\'': case '"': case '`': if (!ignoreQuotedStrings) break; quotedStringEndIndex = (long)(*endIndex)(self, @selector(endIndexOfStringQuotedByCharacter:startingAtIndex:), currentCharacter, currentStringIndex+1); if (quotedStringEndIndex == NSNotFound) { return NSNotFound; } currentStringIndex = quotedStringEndIndex; break; // For opening brackets increment the bracket count case '(': bracketingLevel++; break; // For closing brackets decrement the bracket count case ')': bracketingLevel--; // For comments starting "--[\s]", ensure the start syntax is valid before proceeding. case '-': if (stringLength < currentStringIndex + 2) break; if ((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) != '-') break; if (![[NSCharacterSet whitespaceCharacterSet] characterIsMember:(unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+2)]) break; currentStringIndex = [self endIndexOfCommentOfType:SPDoubleDashComment startingAtIndex:currentStringIndex]; break; case '#': currentStringIndex = [self endIndexOfCommentOfType:SPHashComment startingAtIndex:currentStringIndex]; break; // For comments starting "/*", ensure the start syntax is valid before proceeding. case '/': if (stringLength < currentStringIndex + 1) break; if ((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) != '*') break; currentStringIndex = [self endIndexOfCommentOfType:SPCStyleComment startingAtIndex:currentStringIndex]; break; } } // If no matches have been made in this string, return NSNotFound. return NSNotFound; } /* * Look for the first occurence of a char and reset the split char on runtime * via “delimiter” command for splitSqlStringIntoRangesByCharacter: and splitSqlStringByCharacter. */ - (long) firstOccurrenceInSqlOfCharacter:(unichar)character afterIndex:(long)startIndex skippingBrackets:(BOOL)skipBrackets ignoringQuotedStrings:(BOOL)ignoreQuotedStrings { long currentStringIndex, quotedStringEndIndex; unichar currentCharacter; long stringLength = [string length]; int bracketingLevel = 0; // Cache frequently used selectors, avoiding dynamic binding overhead IMP charAtIndex = [self methodForSelector:@selector(charAtIndex:)]; IMP endIndex = [self methodForSelector:@selector(endIndexOfStringQuotedByCharacter:startingAtIndex:)]; // Sanity check inputs if (startIndex < -1) startIndex = -1; // Walk along the string, processing characters for (currentStringIndex = startIndex + 1; currentStringIndex < stringLength; currentStringIndex++) { currentCharacter = (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex); // Check for the ending character, and if it has been found and quoting/brackets is valid, return. // no “delimiter” is set by the user if (charIsDelimiter) { if(currentCharacter == character) if (!skipBrackets || bracketingLevel <= 0) return currentStringIndex; } // a “delimiter” other than 'character' is set by the user else { if([[self substringWithRange:NSMakeRange(currentStringIndex - delimiterLength, delimiterLength + 1)] isEqualToString:delimiter]) if (!skipBrackets || bracketingLevel <= 0) return currentStringIndex; } // Process strings and comments as appropriate switch (currentCharacter) { // When quote characters are encountered and strings are not being ignored, walk to the end of the quoted string. case '\'': case '"': case '`': if (!ignoreQuotedStrings) break; quotedStringEndIndex = (long)(*endIndex)(self, @selector(endIndexOfStringQuotedByCharacter:startingAtIndex:), currentCharacter, currentStringIndex+1); if (quotedStringEndIndex == NSNotFound) { return NSNotFound; } currentStringIndex = quotedStringEndIndex; break; // For opening brackets increment the bracket count case '(': bracketingLevel++; break; // For closing brackets decrement the bracket count case ')': bracketingLevel--; // For comments starting "--[\s]", ensure the start syntax is valid before proceeding. case '-': if (stringLength < currentStringIndex + 2) break; if ((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) != '-') break; if (![[NSCharacterSet whitespaceCharacterSet] characterIsMember:(unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+2)]) break; currentStringIndex = [self endIndexOfCommentOfType:SPDoubleDashComment startingAtIndex:currentStringIndex]; break; case '#': currentStringIndex = [self endIndexOfCommentOfType:SPHashComment startingAtIndex:currentStringIndex]; break; // For comments starting "/*", ensure the start syntax is valid before proceeding. case '/': if (stringLength < currentStringIndex + 1) break; if ((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) != '*') break; currentStringIndex = [self endIndexOfCommentOfType:SPCStyleComment startingAtIndex:currentStringIndex]; break; case 'd': case 'D': // only parse to “deli” because there's no default command which begins with it; then check via regex // Check for length of “elimiter x\s” if (stringLength >= currentStringIndex + 11) { // Check for “(^|\s)delimiter” if(currentStringIndex == 0 || (currentStringIndex && [[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:(unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex-1)])) { NSArray *delimiterString; switch((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1)) { case 'e': case 'E': switch((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+2)) { case 'l': case 'L': switch((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+3)) { case 'i': case 'I': if([self isMatchedByRegex:@"^(delimiter[ \\t]+(\\S+))(?=\\s)" options:RKLCaseless inRange:NSMakeRange(currentStringIndex, stringLength - currentStringIndex) error:nil]) { isDelimiterCommand = YES; delimiterString = [[self arrayOfCaptureComponentsMatchedByRegex:@"(?i)^(delimiter[ \\t]+(\\S+))(?=\\s)" range:NSMakeRange(currentStringIndex, stringLength - currentStringIndex)] objectAtIndex:0]; delimiter = [delimiterString objectAtIndex:2]; delimiterLength = [delimiter length] - 1; charIsDelimiter = ([delimiter isEqualToString:[NSString stringWithFormat:@"%C", character]]); return currentStringIndex + [[delimiterString objectAtIndex:1] length] - delimiterLength; } default: break; } default: break; } default: break; } } } } } // If no matches have been made in this string, return NSNotFound. return NSNotFound; } /* * A method intended for use by the functions above. */ - (long) endIndexOfStringQuotedByCharacter:(unichar)quoteCharacter startingAtIndex:(long)index { long currentStringIndex, stringLength, i, quotedStringLength; BOOL characterIsEscaped; unichar currentCharacter; // Cache the charAtIndex selector, avoiding dynamic binding overhead IMP charAtIndex = [self methodForSelector:@selector(charAtIndex:)]; stringLength = [string length]; // Walk the string looking for the string end for ( currentStringIndex = index; currentStringIndex < stringLength; currentStringIndex++) { currentCharacter = (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex); // If the string end is a backtick and one has been encountered, treat it as end of string if (quoteCharacter == '`' && currentCharacter == '`') { // ...as long as the next character isn't also a backtick, in which case it's being quoted. Skip both. if ((currentStringIndex + 1) < stringLength && (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) == '`') { currentStringIndex++; continue; } return currentStringIndex; // Otherwise, prepare to treat the string as ended when meeting the correct boundary character.... } else if (currentCharacter == quoteCharacter) { // ...but only if the string end isn't escaped with an *odd* number of escaping characters... characterIsEscaped = NO; i = 1; quotedStringLength = currentStringIndex - 1; while ((quotedStringLength - i) > 0 && (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex - i) == '\\') { characterIsEscaped = !characterIsEscaped; i++; } // If an even number have been found, it may be the end of the string - as long as the subsequent character // isn't also the same character, in which case it's another form of escaping. if (!characterIsEscaped) { if ((currentStringIndex + 1) < stringLength && (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), currentStringIndex+1) == quoteCharacter) { currentStringIndex++; continue; } // Really is the end of the string. return currentStringIndex; } } } return NSNotFound; } /* * A method intended for use by the functions above. */ - (long) endIndexOfCommentOfType:(SPCommentType)commentType startingAtIndex:(long)index { long stringLength = [string length]; unichar currentCharacter; // Cache the charAtIndex selector, avoiding dynamic binding overhead IMP charAtIndex = [self methodForSelector:@selector(charAtIndex:)]; switch (commentType) { // For comments of type "--[\s]", start the comment processing two characters in to match the start syntax, // then flow into the Hash comment handling (looking for first newline). case SPDoubleDashComment: index = index+2; // For comments starting "--[\s]" and "#", continue until the first newline. case SPHashComment: index++; for ( ; index < stringLength; index++ ) { currentCharacter = (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), index); if (currentCharacter == '\r' || currentCharacter == '\n') { return index-1; } } break; // For comments starting "/*", start the comment processing one character in to match the start syntax, then // continue until the first matching "*/". case SPCStyleComment: index = index+2; for ( ; index < stringLength; index++ ) { if ((unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), index) == '*') { if ((stringLength > index + 1) && (unichar)(long)(*charAtIndex)(self, @selector(charAtIndex:), index+1) == '/') { return (index+1); } } } } // If no match has been found, the comment must continue until the very end of the string. return (stringLength-1); } /* * Provide a method to retrieve a character from the local cache. * Does no bounds checking on the underlying string, and so is kept * separate for characterAtIndex:. */ - (unichar) charAtIndex:(long)index { // If the current cache doesn't include the current character, update it. if (index > charCacheEnd || index < charCacheStart) { if (charCacheEnd > -1) { free(stringCharCache); } unsigned int remainingStringLength = [string length] - index; unsigned int newcachelength = (CHARACTER_CACHE_LENGTH < remainingStringLength)?CHARACTER_CACHE_LENGTH:remainingStringLength; stringCharCache = (unichar *)calloc(newcachelength, sizeof(unichar)); [string getCharacters:stringCharCache range:NSMakeRange(index, newcachelength)]; charCacheEnd = index + newcachelength - 1; charCacheStart = index; } return stringCharCache[index - charCacheStart]; } /* * Provide a method to cleat the cache, and use it when updating the string. */ - (void) clearCharCache { if (charCacheEnd > -1) { free(stringCharCache); } charCacheEnd = -1; charCacheStart = 0; } - (void) deleteCharactersInRange:(NSRange)aRange { [super deleteCharactersInRange:aRange]; [self clearCharCache]; } - (void) insertString:(NSString *)aString atIndex:(NSUInteger)anIndex { [super insertString:aString atIndex:anIndex]; [self clearCharCache]; } /* Required and primitive methods to allow subclassing class cluster */ #pragma mark - - (id) init { if (self = [super init]) { string = [[NSMutableString string] retain]; } charCacheEnd = -1; return self; } - (id) initWithBytes:(const void *)bytes length:(unsigned int)length encoding:(NSStringEncoding)encoding { if (self = [super init]) { string = [[NSMutableString alloc] initWithBytes:bytes length:length encoding:encoding]; } charCacheEnd = -1; return self; } - (id) initWithBytesNoCopy:(void *)bytes length:(unsigned int)length encoding:(NSStringEncoding)encoding freeWhenDone:(BOOL)flag { if (self = [super init]) { string = [[NSMutableString alloc] initWithBytesNoCopy:bytes length:length encoding:encoding freeWhenDone:flag]; } charCacheEnd = -1; return self; } - (id) initWithCapacity:(unsigned int)capacity { if (self = [super init]) { string = [[NSMutableString stringWithCapacity:capacity] retain]; } charCacheEnd = -1; return self; } - (id) initWithCharactersNoCopy:(unichar *)characters length:(unsigned int)length freeWhenDone:(BOOL)flag { if (self = [super init]) { string = [[NSMutableString alloc] initWithCharactersNoCopy:characters length:length freeWhenDone:flag]; } charCacheEnd = -1; return self; } - (id) initWithContentsOfFile:(id)path { charCacheEnd = -1; return [self initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:NULL]; } - (id) initWithContentsOfFile:(NSString *)path encoding:(NSStringEncoding)encoding error:(NSError **)error { if (self = [super init]) { string = [[NSMutableString alloc] initWithContentsOfFile:path encoding:encoding error:error]; } charCacheEnd = -1; return self; } - (id) initWithCString:(const char *)nullTerminatedCString encoding:(NSStringEncoding)encoding { if (self = [super init]) { string = [[NSMutableString alloc] initWithCString:nullTerminatedCString encoding:encoding]; } charCacheEnd = -1; return self; } - (id) initWithFormat:(NSString *)format, ... { va_list argList; va_start(argList, format); id str = [self initWithFormat:format arguments:argList]; va_end(argList); charCacheEnd = -1; return str; } - (id) initWithFormat:(NSString *)format arguments:(va_list)argList { if (self = [super init]) { string = [[NSMutableString alloc] initWithFormat:format arguments:argList]; } charCacheEnd = -1; return self; } - (unsigned int) length { return [string length]; } - (unichar) characterAtIndex:(unsigned int)index { return [string characterAtIndex:index]; } - (id) description { return [string description]; } - (unsigned int) replaceOccurrencesOfString:(NSString *)target withString:(NSString *)replacement options:(unsigned)options range:(NSRange)searchRange { return [string replaceOccurrencesOfString:target withString:replacement options:options range:searchRange]; [self clearCharCache]; } - (void) setString:(NSString *)aString { [string setString:aString]; [self clearCharCache]; } - (void) replaceCharactersInRange:(NSRange)range withString:(NSString *)aString { [string replaceCharactersInRange:range withString:aString]; [self clearCharCache]; } - (void) dealloc { [string release]; if (charCacheEnd != -1) free(stringCharCache); [super dealloc]; } @end /* * As splitStringByCharacter: ..., but allows control over quoting * - it recognises CREATE ... BEGIN ... END statements * - it can detect a SINGLE SQL statement in between * delimiter foo ... foo delimiter ; * ['delimiter ;' MUST be given!] * - it returns an array of ranges (as NSString "{loc, length}"). * FromPosition: is needed if a subrange is passed to sync the ranges * according to the CQ textView ones. */ // - (NSArray *) splitStringIntoRangesOfSQLQueries // { // return [self splitStringIntoRangesOfSQLQueriesFromPosition:0]; // } // - (NSArray *) splitStringIntoRangesOfSQLQueriesFromPosition:(long)position // { // NSMutableArray *resultsArray = [NSMutableArray array]; // // //initialise flex // yyuoffset = 0; yyuleng = 0; // to_switch_to_buffer(to_scan_string([string UTF8String])); // // unsigned long token; // unsigned long lastFoundToken = 0; // unsigned long delimLength = 0; // unsigned long commentStart = 0; // unsigned long commentLength = 0; // // NSString *delimString; // // //now loop through all queries // while (token=tolex()){ // switch (token) { // case SP_SQL_TOKEN_SEMICOLON: // [resultsArray addObject:[NSString stringWithFormat:@"{%d,%d}", lastFoundToken+position, yyuoffset-lastFoundToken]]; // break; // case SP_SQL_TOKEN_SINGLE_LINE_COMMENT: // commentStart = yyuoffset+position; // commentLength = yyuleng; // break; // case SP_SQL_TOKEN_DELIM_END: // [resultsArray addObject:[NSString stringWithFormat:@"{%d,%d}", lastFoundToken+position, yyuoffset-lastFoundToken-delimLength]]; // delimLength = 0; // delimString = nil; // break; // case SP_SQL_TOKEN_DELIM_VALUE: // delimString = [string substringWithRange:NSMakeRange(yyuoffset,yyuleng)]; // // NSLog(@"del: %@", delimString); // delimLength = yyuleng; // break; // case SP_SQL_TOKEN_COMPOUND_END: // [resultsArray addObject:[NSString stringWithFormat:@"{%d,%d}", lastFoundToken+position, yyuoffset+yyuleng-lastFoundToken]]; // break; // default: // continue; // } // if(token