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//
// CDataScanner_Extensions.m
// TouchCode
//
// Created by Jonathan Wight on 12/08/2005.
// Copyright 2005 toxicsoftware.com. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#import "CDataScanner_Extensions.h"
#define LF 0x000a // Line Feed
#define FF 0x000c // Form Feed
#define CR 0x000d // Carriage Return
#define NEL 0x0085 // Next Line
#define LS 0x2028 // Line Separator
#define PS 0x2029 // Paragraph Separator
@implementation CDataScanner (CDataScanner_Extensions)
- (BOOL)scanCStyleComment:(NSString **)outComment
{
if ([self scanString:@"/*" intoString:NULL] == YES)
{
NSString *theComment = NULL;
if ([self scanUpToString:@"*/" intoString:&theComment] == NO)
[NSException raise:NSGenericException format:@"Started to scan a C style comment but it wasn't terminated."];
if ([theComment rangeOfString:@"/*"].location != NSNotFound)
[NSException raise:NSGenericException format:@"C style comments should not be nested."];
if ([self scanString:@"*/" intoString:NULL] == NO)
[NSException raise:NSGenericException format:@"C style comment did not end correctly."];
if (outComment != NULL)
*outComment = theComment;
return(YES);
}
else
{
return(NO);
}
}
- (BOOL)scanCPlusPlusStyleComment:(NSString **)outComment
{
if ([self scanString:@"//" intoString:NULL] == YES)
{
unichar theCharacters[] = { LF, FF, CR, NEL, LS, PS, };
NSCharacterSet *theLineBreaksCharacterSet = [NSCharacterSet characterSetWithCharactersInString:[NSString stringWithCharacters:theCharacters length:sizeof(theCharacters) / sizeof(*theCharacters)]];
NSString *theComment = NULL;
[self scanUpToCharactersFromSet:theLineBreaksCharacterSet intoString:&theComment];
[self scanCharactersFromSet:theLineBreaksCharacterSet intoString:NULL];
if (outComment != NULL)
*outComment = theComment;
return(YES);
}
else
{
return(NO);
}
}
- (NSUInteger)lineOfScanLocation
{
NSUInteger theLine = 0;
for (const u_int8_t *C = start; C < current; ++C)
{
// TODO: JIW What about MS-DOS line endings you bastard! (Also other unicode line endings)
if (*C == '\n' || *C == '\r')
{
++theLine;
}
}
return(theLine);
}
- (NSDictionary *)userInfoForScanLocation
{
NSUInteger theLine = 0;
const u_int8_t *theLineStart = start;
for (const u_int8_t *C = start; C < current; ++C)
{
if (*C == '\n' || *C == '\r')
{
theLineStart = C - 1;
++theLine;
}
}
NSUInteger theCharacter = current - theLineStart;
NSRange theStartRange = NSIntersectionRange((NSRange){ .location = MAX((NSInteger)self.scanLocation - 20, 0), .length = 20 + (NSInteger)self.scanLocation - 20 }, (NSRange){ .location = 0, .length = self.data.length });
NSRange theEndRange = NSIntersectionRange((NSRange){ .location = self.scanLocation, .length = 20 }, (NSRange){ .location = 0, .length = self.data.length });
NSString *theSnippet = [NSString stringWithFormat:@"%@!HERE>!%@",
[[[NSString alloc] initWithData:[self.data subdataWithRange:theStartRange] encoding:NSUTF8StringEncoding] autorelease],
[[[NSString alloc] initWithData:[self.data subdataWithRange:theEndRange] encoding:NSUTF8StringEncoding] autorelease]
];
NSDictionary *theUserInfo = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithUnsignedInteger:theLine], @"line",
[NSNumber numberWithUnsignedInteger:theCharacter], @"character",
[NSNumber numberWithUnsignedInteger:self.scanLocation], @"location",
theSnippet, @"snippet",
NULL];
return(theUserInfo);
}
@end
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