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//
// TikzGraphAssembler.m
// TikZiT
//
// Copyright 2010 Aleks Kissinger. All rights reserved.
//
//
// This file is part of TikZiT.
//
// TikZiT 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 3 of the License, or
// (at your option) any later version.
//
// TikZiT 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 TikZiT. If not, see <http://www.gnu.org/licenses/>.
//
#import "TikzGraphAssembler.h"
#import "NSError+Tikzit.h"
extern int yyparse(void);
extern int yylex(void);
extern int yy_scan_string(const char* yy_str);
extern void yy_delete_buffer(int b);
extern int yylex_destroy(void);
static NSLock *parseLock = nil;
static id currentAssembler = nil;
extern int yylineno;
extern int yyleng;
int lineno;
int tokenpos;
extern char *yystr;
char linebuff[500];
void yyerror(const char *str) {
// if the error is on the first line, treat specially
if(lineno == 1){
// strcpy(linebuff, yytext+1);
NSLog(@"Problem ahoy!");
}
NSLog(@"Parse error on line %i: %s\n%s\n%@\n", lineno, str, linebuff, [[@"" stringByPaddingToLength:(tokenpos-yyleng) withString: @" " startingAtIndex:0] stringByAppendingString:[@"" stringByPaddingToLength:yyleng withString: @"^" startingAtIndex:0]]);
if (currentAssembler != nil) {
NSError *error = [NSError errorWithDomain:@"net.sourceforge.tikzit"
code:TZ_ERR_PARSE
userInfo:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithCString:str encoding:NSUTF8StringEncoding],
[NSNumber numberWithInt:lineno],
[NSString stringWithCString:linebuff encoding:NSUTF8StringEncoding],
[NSNumber numberWithInt:tokenpos],
[NSNumber numberWithInt:yyleng],
nil]
forKeys: [NSArray arrayWithObjects:NSLocalizedDescriptionKey,
@"lineNumber",
@"syntaxString",
@"tokenStart",
@"tokenLength",
nil]]];
[currentAssembler invalidateWithError:error];
}
}
int yywrap() {
return 1;
}
@implementation TikzGraphAssembler
- (id)init {
self = [super init];
return self;
}
- (void)dealloc {
[graph release];
[lastError release];
[super dealloc];
}
- (Graph*)graph { return graph; }
- (NSError*)lastError { return lastError; }
- (BOOL)parseTikz:(NSString *)tikz {
return [self parseTikz:tikz forGraph:[Graph graph]];
}
- (BOOL)parseTikz:(NSString*)tikz forGraph:(Graph*)gr {
[parseLock lock];
lineno = 1;
tokenpos = 0;
NSRange range = [tikz rangeOfString:@"\n"];
NSString *firstLine;
if (range.length == 0) {
firstLine = tikz;
} else {
firstLine = [tikz substringToIndex:range.location];
}
if (![firstLine getCString:linebuff
maxLength:500
encoding:NSUTF8StringEncoding]) {
// first line too long; just terminate it at the end of the buffer
linebuff[499] = 0;
}
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
currentAssembler = self;
// set the current graph
if (graph != gr) {
[graph release];
graph = [gr retain];
}
// the node map keeps track of the mapping of names to nodes
nodeMap = [[NSMutableDictionary alloc] init];
// do the parsing if actual input
if([tikz length] > 0){
yy_scan_string([tikz UTF8String]);
yyparse();
yylex_destroy();
}
[nodeMap release];
nodeMap = nil;
currentAssembler = nil;
[pool drain];
[parseLock unlock];
return (graph != nil);
}
- (BOOL)testTikz:(NSString *)tikz{
BOOL r;
NSString * testTikz = [NSString stringWithFormat: @"{%@}", tikz];
yy_scan_string([testTikz UTF8String]);
yylex();
r = !(yyleng < [testTikz length]);
[testTikz autorelease];
yylex_destroy();
return r;
}
- (void)invalidate {
[graph release];
graph = nil;
lastError = nil;
}
- (void)invalidateWithError:(NSError*)error {
[self invalidate];
lastError = [error retain];
}
+ (void)setup {
parseLock = [[NSLock alloc] init];
}
+ (TikzGraphAssembler*)currentAssembler {
return currentAssembler;
}
+ (TikzGraphAssembler*)assembler {
return [[[TikzGraphAssembler alloc] init] autorelease];
}
@end
@implementation TikzGraphAssembler (Parser)
- (void)addNodeToMap:(Node*)n {
[nodeMap setObject:n forKey:[n name]];
}
- (Node*)nodeWithName:(NSString*)name {
return [nodeMap objectForKey:name];
}
@end
// vi:ft=objc:ts=4:noet:sts=4:sw=4
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