1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
//
// 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 "TikzGraphAssembler+Parser.h"
#import "tikzparser.h"
#import "tikzlexer.h"
#import "NSError+Tikzit.h"
void yyerror(TikzGraphAssembler *assembler, const char *str) {
[assembler invalidateWithError:str];
}
@implementation TikzGraphAssembler
- (id)init {
self = nil;
return nil;
}
- (id)initWithGraph:(Graph*)g {
self = [super init];
if (self) {
graph = [g retain];
nodeMap = [[NSMutableDictionary alloc] init];
yylex_init (&scanner);
yyset_extra(self, scanner);
}
return self;
}
- (void)dealloc {
[graph release];
[nodeMap release];
[lastError release];
yylex_destroy (scanner);
[super dealloc];
}
+ (BOOL) parseTikz:(NSString*)tikz forGraph:(Graph*)gr {
return [self parseTikz:tikz forGraph:gr error:NULL];
}
+ (Graph*) parseTikz:(NSString*)tikz error:(NSError**)e {
Graph *gr = [[Graph alloc] init];
if ([self parseTikz:tikz forGraph:gr error:e]) {
return [gr autorelease];
} else {
[gr release];
return nil;
}
}
+ (Graph*) parseTikz:(NSString*)tikz {
return [self parseTikz:tikz error:NULL];
}
+ (BOOL) parseTikz:(NSString*)tikz forGraph:(Graph*)gr error:(NSError**)error {
if([tikz length] == 0) {
// empty string -> empty graph
return YES;
}
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
TikzGraphAssembler *assembler = [[self alloc] initWithGraph:gr];
[assembler autorelease];
/*
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;
}
*/
yy_scan_string([tikz UTF8String], [assembler scanner]);
int result = yyparse(assembler);
[pool drain];
if (result == 0) {
return YES;
} else {
if (error) {
/*
if (lastError) {
*error = [[lastError retain] autorelease];
} else
*/
if (result == 1) {
*error = [NSError errorWithMessage:@"Syntax error"
code:TZ_ERR_PARSE];
} else if (result == 2) {
*error = [NSError errorWithMessage:@"Insufficient memory"
code:TZ_ERR_PARSE];
} else {
*error = [NSError errorWithMessage:@"Unknown error"
code:TZ_ERR_PARSE];
}
}
return NO;
}
}
+ (BOOL)validateTikzPropertyNameOrValue:(NSString*)tikz {
BOOL r;
NSString * testTikz = [NSString stringWithFormat: @"{%@}", tikz];
void *scanner;
yylex_init (&scanner);
yyset_extra(nil, scanner);
yy_scan_string([testTikz UTF8String], scanner);
YYSTYPE lval;
yylex(&lval, scanner);
r = !(yyget_leng(scanner) < [testTikz length]);
yylex_destroy(scanner);
[testTikz autorelease];
return r;
}
- (void)invalidate {
[graph release];
graph = nil;
lastError = nil;
}
@end
@implementation TikzGraphAssembler (Parser)
- (Graph*)graph { return graph; }
- (void)addNodeToMap:(Node*)n {
[nodeMap setObject:n forKey:[n name]];
}
- (Node*)nodeWithName:(NSString*)name {
return [nodeMap objectForKey:name];
}
- (void) newLineStarted:(char *)text {
/*
strncpy(linebuff, yytext+1, 500);
linebuff[499] = 0; // ensure null-terminated
lineno++;
tokenpos = 0;
*/
}
- (void) incrementPosBy:(size_t)amount {
//tokenpos += amount;
}
- (void) invalidateWithError:(const char *)message {
/*
// if the error is on the first line, treat specially
if([assembler lineNumber] == 1){
//strcpy(linebuff, yytext+1);
NSLog(@"Problem ahoy!");
}
NSString *pointerStrPad = [@"" stringByPaddingToLength:(tokenpos-yyleng)
withString:@" "
startingAtIndex:0];
NSString *pointerStr = [@"" stringByPaddingToLength:yyleng
withString:@"^"
startingAtIndex:0];
NSLog(@"Parse error on line %i: %s\n%s\n%@\n", lineno, str, linebuff,
[pointerStrPad stringByAppendingString:pointerStr]);
NSDictionary *userInfo =
[NSDictionary dictionaryWithObjectsAndKeys:
[NSString stringWithUTF8String:str],
NSLocalizedDescriptionKey,
[NSNumber numberWithInt:lineno],
@"lineNumber",
[NSString stringWithUTF8String:linebuff],
@"syntaxString",
[NSNumber numberWithInt:tokenpos],
@"tokenStart",
[NSNumber numberWithInt:yyleng],
@"tokenLength"];
NSError *error =
[NSError errorWithDomain:@"net.sourceforge.tikzit"
code:TZ_ERR_PARSE
userInfo:userInfo];
lastError = [error retain];
*/
[self invalidate];
}
- (void*) scanner { return scanner; }
@end
// vi:ft=objc:ts=4:noet:sts=4:sw=4
|
