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10 package org.openlaszlo.sc.parser;
11
12 public class ASTLiteral extends SimpleNode {
13
14 private Object  mValue = null;
15
16 public ASTLiteral(int id) {
17 super(id);
18 }
19
20 public ASTLiteral(Parser p, int id) {
21 super(p, id);
22 }
23
24 public static Node jjtCreate(int id) {
25 return new ASTLiteral(id);
26 }
27
28 public static Node jjtCreate(Parser p, int id) {
29 return new ASTLiteral(p, id);
30 }
31
32 public ASTLiteral(Object value) {
34 mValue = value;
35 }
36
37 public Object getValue() {
38 return mValue;
39 }
40
41 static final int hexval(char c) {
42 switch(c) {
43 case '0' :
44 return 0;
45 case '1' :
46 return 1;
47 case '2' :
48 return 2;
49 case '3' :
50 return 3;
51 case '4' :
52 return 4;
53 case '5' :
54 return 5;
55 case '6' :
56 return 6;
57 case '7' :
58 return 7;
59 case '8' :
60 return 8;
61 case '9' :
62 return 9;
63
64 case 'a' :
65 case 'A' :
66 return 10;
67 case 'b' :
68 case 'B' :
69 return 11;
70 case 'c' :
71 case 'C' :
72 return 12;
73 case 'd' :
74 case 'D' :
75 return 13;
76 case 'e' :
77 case 'E' :
78 return 14;
79 case 'f' :
80 case 'F' :
81 return 15;
82 }
83
84 throw new RuntimeException ("Illegal hex or unicode constant");
85 }
87
88 static final int octval(char c) {
89 switch(c) {
90 case '0' :
91 return 0;
92 case '1' :
93 return 1;
94 case '2' :
95 return 2;
96 case '3' :
97 return 3;
98 case '4' :
99 return 4;
100 case '5' :
101 return 5;
102 case '6' :
103 return 6;
104 case '7' :
105 return 7;
106 case '8' :
107 return 8;
108 case '9' :
109 return 9;
110
111 case 'a' :
112 case 'A' :
113 return 10;
114 case 'b' :
115 case 'B' :
116 return 11;
117 case 'c' :
118 case 'C' :
119 return 12;
120 case 'd' :
121 case 'D' :
122 return 13;
123 case 'e' :
124 case 'E' :
125 return 14;
126 case 'f' :
127 case 'F' :
128 return 15;
129 }
130
131 throw new RuntimeException ("Illegal octal constant");
132 }
134
135 public void setStringValue(String image) {
136 int l = image.length();
137 StringBuffer sb = new StringBuffer (l);
138 for (int i=0; i<l; i++) {
139 char c = image.charAt(i);
140 if ((c == '\\') && (i+1<l)){
141 i++;
142 c = image.charAt(i);
143 if (c=='n') c='\n';
144 else if (c=='b') c = '\b';
145 else if (c=='f') c = '\f';
146 else if (c=='r') c = '\r';
147 else if (c=='t') c = '\t';
148 else if (c =='x') {
149 c = (char)(hexval(image.charAt(i+1)) << 4 |
150 hexval(image.charAt(i+1)));
151 i +=2;
152 } else if (c =='u') {
153 c = (char)(hexval(image.charAt(i+1)) << 12 |
154 hexval(image.charAt(i+2)) << 8 |
155 hexval(image.charAt(i+3)) << 4 |
156 hexval(image.charAt(i+4)));
157 i +=4;
158 } else if (c >='0' && c <= '7') {
159 c = (char)(octval(image.charAt(i)));
160 if ((image.length()>i) &&
161 (image.charAt(i+1)>='0') && (image.charAt(i+1)<='7')) {
162 i++;
163 c = (char) ((c<<4) | octval(image.charAt(i)));
164 }
165 }
166 }
167 sb.append(c);
168 }
169 mValue = sb.toString();
170 }
171
172 public void setDecimalValue(String image) {
173 try {
174 mValue = new Long (Long.parseLong(image));
175 } catch (NumberFormatException e) {
176 mValue = new Double (image);
177 }
178 }
179
180 public void setOctalValue(String image) {
181 try {
182 String imageWithout0 = image.substring(1);
183 mValue = new Long (Long.parseLong(imageWithout0,8));
184 } catch (NumberFormatException e) {
185 mValue = new Double (image);
186 }
187 }
188
189 public void setHexValue(String image) {
190 try {
191 String imageWithout0x = image.substring(2);
192 mValue = new Long (Long.parseLong(imageWithout0x,16));
193 } catch (NumberFormatException e) {
194 mValue = new Double (image);
195 }
196 }
197
198 public void setFloatingPointValue(String image) {
199 mValue = new Double (image);
200 }
201
202 public void setBooleanValue(boolean value) {
203 mValue = new Boolean (value);
204 }
205
206 public void setNullValue() {
207 mValue = null;
208 }
209
210 public String toString() {
211 if (mValue == null) {
212 return "null";
213 }
214 return "Literal(" + mValue.toString() + ")";
215 }
216
217 }
218 |
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