1 /*
2 * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package build.tools.charsetmapping;
27
28 import java.io.*;
29 import java.util.Arrays;
30 import java.util.ArrayList;
31 import java.util.Scanner;
32 import java.util.Formatter;
33 import java.util.regex.Pattern;
34 import static build.tools.charsetmapping.Utils.*;
35
36 public class SBCS {
37
38 static Pattern sbmap = Pattern.compile("0x(\\p{XDigit}++)\\s++(?:U\\+|0x)?(\\p{XDigit}++)(?:\\s++#.*)?");
39
40 public static void genClass(Charset cs,
41 String srcDir, String dstDir, String template)
42 throws Exception
43 {
44 String clzName = cs.clzName;
45 String csName = cs.csName;
46 String hisName = cs.hisName;
47 String pkgName = cs.pkgName;
48 boolean isASCII = cs.isASCII;
49
50 StringBuilder b2cSB = new StringBuilder();
51 StringBuilder b2cNRSB = new StringBuilder();
52 StringBuilder c2bNRSB = new StringBuilder();
53
54 char[] sb = new char[0x100];
55 char[] c2bIndex = new char[0x100];
56 int c2bOff = 0;
57 Arrays.fill(sb, UNMAPPABLE_DECODING);
58 Arrays.fill(c2bIndex, UNMAPPABLE_DECODING);
59
60 // (1)read in .map to parse all b->c entries
61 FileInputStream in = new FileInputStream(
62 new File(srcDir, clzName + ".map"));
63 Parser p = new Parser(in, sbmap);
64 Entry e = null;
65
66 while ((e = p.next()) != null) {
67 sb[e.bs] = (char)e.cp;
68 if (c2bIndex[e.cp>>8] == UNMAPPABLE_DECODING) {
69 c2bOff += 0x100;
70 c2bIndex[e.cp>>8] = 1;
71 }
72 }
73
74 Formatter fm = new Formatter(b2cSB);
75 fm.format("%n");
76
77 // vm -server shows cc[byte + 128] access is much faster than
78 // cc[byte&0xff] so we output the upper segment first
79 toString(sb, 0x80, 0x100, fm, "+", true);
80 toString(sb, 0x00, 0x80, fm, ";", true);
81 fm.close();
82
83 // (2)now the .nr file which includes "b->c" non-roundtrip entries
84 File f = new File(srcDir, clzName + ".nr");
85 if (f.exists()) {
86 in = new FileInputStream(f);
87 fm = new Formatter(b2cNRSB);
88 p = new Parser(in, sbmap);
89 e = null;
90
91 fm.format("// remove non-roundtrip entries%n");
92 fm.format(" b2cMap = b2cTable.toCharArray();%n");
93 while ((e = p.next()) != null) {
94 fm.format(" b2cMap[%d] = UNMAPPABLE_DECODING;%n",
95 (e.bs>=0x80)?(e.bs-0x80):(e.bs+0x80));
96 }
97 fm.close();
98 }
99
100 // (3)finally the .c2b file which includes c->b non-roundtrip entries
101 f = new File(srcDir, clzName + ".c2b");
102 if (f.exists()) {
103 in = new FileInputStream(f);
104 fm = new Formatter(c2bNRSB);
105 p = new Parser(in, sbmap);
106 e = null;
107 ArrayList<Entry> es = new ArrayList<Entry>();
108 while ((e = p.next()) != null) {
109 if (c2bIndex[e.cp>>8] == UNMAPPABLE_DECODING) {
110 c2bOff += 0x100;
111 c2bIndex[e.cp>>8] = 1;
112 }
113 es.add(e);
114 }
115 fm.format("// non-roundtrip c2b only entries%n");
116 if (es.size() < 100) {
117 fm.format(" c2bNR = new char[%d];%n", es.size() * 2);
118 int i = 0;
119 for (Entry entry: es) {
120 fm.format(" c2bNR[%d] = 0x%x; c2bNR[%d] = 0x%x;%n",
121 i++, entry.bs, i++, entry.cp);
122 }
123 } else {
124 char[] cc = new char[es.size() * 2];
125 int i = 0;
126 for (Entry entry: es) {
127 cc[i++] = (char)entry.bs;
128 cc[i++] = (char)entry.cp;
129 }
130 fm.format(" c2bNR = (%n");
131 toString(cc, 0, i, fm, ").toCharArray();", false);
132 }
133 fm.close();
134 }
135
136 // (4)it's time to generate the source file
137 String b2c = b2cSB.toString();
138 String b2cNR = b2cNRSB.toString();
139 String c2bNR = c2bNRSB.toString();
140
141 Scanner s = new Scanner(new File(srcDir, template));
142 PrintStream out = new PrintStream(new FileOutputStream(
143 new File(dstDir, clzName + ".java")));
144
145 while (s.hasNextLine()) {
146 String line = s.nextLine();
147 int i = line.indexOf("$");
148 if (i == -1) {
149 out.println(line);
150 continue;
151 }
152 if (line.indexOf("$PACKAGE$", i) != -1) {
153 line = line.replace("$PACKAGE$", pkgName);
154 }
155 if (line.indexOf("$NAME_CLZ$", i) != -1) {
156 line = line.replace("$NAME_CLZ$", clzName);
157 }
158 if (line.indexOf("$NAME_CS$", i) != -1) {
159 line = line.replace("$NAME_CS$", csName);
160 }
161 if (line.indexOf("$NAME_ALIASES$", i) != -1) {
162 if ("sun.nio.cs".equals(pkgName))
163 line = line.replace("$NAME_ALIASES$",
164 "StandardCharsets.aliases_" + clzName);
165 else
166 line = line.replace("$NAME_ALIASES$",
167 "ExtendedCharsets.aliasesFor(\"" + csName + "\")");
168 }
169 if (line.indexOf("$NAME_HIS$", i) != -1) {
170 line = line.replace("$NAME_HIS$", hisName);
171 }
172 if (line.indexOf("$CONTAINS$", i) != -1) {
173 if (isASCII)
174 line = " return ((cs.name().equals(\"US-ASCII\")) || (cs instanceof " + clzName + "));";
175 else
176 line = " return (cs instanceof " + clzName + ");";
177 }
178 if (line.indexOf("$B2CTABLE$") != -1) {
179 line = line.replace("$B2CTABLE$", b2c);
180 }
181 if (line.indexOf("$C2BLENGTH$") != -1) {
182 line = line.replace("$C2BLENGTH$", "0x" + Integer.toString(c2bOff, 16));
183 }
184 if (line.indexOf("$NONROUNDTRIP_B2C$") != -1) {
185 if (b2cNR.length() == 0)
186 continue;
187 line = line.replace("$NONROUNDTRIP_B2C$", b2cNR);
188 }
189
190 if (line.indexOf("$NONROUNDTRIP_C2B$") != -1) {
191 if (c2bNR.length() == 0)
192 continue;
193 line = line.replace("$NONROUNDTRIP_C2B$", c2bNR);
194 }
195 out.println(line);
196 }
197 out.close();
198 }
199
200 private static void toString(char[] sb, int off, int end,
201 Formatter out, String closure, boolean comment)
202 {
203 while (off < end) {
204 out.format(" \"");
205 for (int j = 0; j < 8; j++) {
206 if (off == end)
207 break;
208 char c = sb[off++];
209 switch (c) {
210 case '\b':
211 out.format("\\b"); break;
212 case '\t':
213 out.format("\\t"); break;
214 case '\n':
215 out.format("\\n"); break;
216 case '\f':
217 out.format("\\f"); break;
218 case '\r':
219 out.format("\\r"); break;
220 case '\"':
221 out.format("\\\""); break;
222 case '\'':
223 out.format("\\'"); break;
224 case '\\':
225 out.format("\\\\"); break;
226 default:
227 out.format("\\u%04X", c & 0xffff);
228 }
229 }
230 if (comment) {
231 if (off == end)
232 out.format("\" %s // 0x%02x - 0x%02x%n",
233 closure, off-8, off-1);
234 else
235 out.format("\" + // 0x%02x - 0x%02x%n",
236 off-8, off-1);
237 } else {
238 if (off == end)
239 out.format("\"%s%n", closure);
240 else
241 out.format("\" +%n");
242 }
243 }
244 }
245 }