1 | /* |
2 | * Copyright 1999-2006 Sun Microsystems, Inc. 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. Sun designates this |
8 | * particular file as subject to the "Classpath" exception as provided |
9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
23 | * have any questions. |
24 | */ |
25 | |
26 | package com.sun.tools.javac.util; |
27 | |
28 | /** Utility class for static conversion methods between numbers |
29 | * and strings in various formats. |
30 | * |
31 | * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
32 | * you write code that depends on this, you do so at your own risk. |
33 | * This code and its internal interfaces are subject to change or |
34 | * deletion without notice.</b> |
35 | */ |
36 | public class Convert { |
37 | |
38 | /** Convert string to integer. |
39 | */ |
40 | public static int string2int(String s, int radix) |
41 | throws NumberFormatException { |
42 | if (radix == 10) { |
43 | return Integer.parseInt(s, radix); |
44 | } else { |
45 | char[] cs = s.toCharArray(); |
46 | int limit = Integer.MAX_VALUE / (radix/2); |
47 | int n = 0; |
48 | for (int i = 0; i < cs.length; i++) { |
49 | int d = Character.digit(cs[i], radix); |
50 | if (n < 0 || |
51 | n > limit || |
52 | n * radix > Integer.MAX_VALUE - d) |
53 | throw new NumberFormatException(); |
54 | n = n * radix + d; |
55 | } |
56 | return n; |
57 | } |
58 | } |
59 | |
60 | /** Convert string to long integer. |
61 | */ |
62 | public static long string2long(String s, int radix) |
63 | throws NumberFormatException { |
64 | if (radix == 10) { |
65 | return Long.parseLong(s, radix); |
66 | } else { |
67 | char[] cs = s.toCharArray(); |
68 | long limit = Long.MAX_VALUE / (radix/2); |
69 | long n = 0; |
70 | for (int i = 0; i < cs.length; i++) { |
71 | int d = Character.digit(cs[i], radix); |
72 | if (n < 0 || |
73 | n > limit || |
74 | n * radix > Long.MAX_VALUE - d) |
75 | throw new NumberFormatException(); |
76 | n = n * radix + d; |
77 | } |
78 | return n; |
79 | } |
80 | } |
81 | |
82 | /* Conversion routines between names, strings, and byte arrays in Utf8 format |
83 | */ |
84 | |
85 | /** Convert `len' bytes from utf8 to characters. |
86 | * Parameters are as in System.arraycopy |
87 | * Return first index in `dst' past the last copied char. |
88 | * @param src The array holding the bytes to convert. |
89 | * @param sindex The start index from which bytes are converted. |
90 | * @param dst The array holding the converted characters.. |
91 | * @param dindex The start index from which converted characters |
92 | * are written. |
93 | * @param len The maximum number of bytes to convert. |
94 | */ |
95 | public static int utf2chars(byte[] src, int sindex, |
96 | char[] dst, int dindex, |
97 | int len) { |
98 | int i = sindex; |
99 | int j = dindex; |
100 | int limit = sindex + len; |
101 | while (i < limit) { |
102 | int b = src[i++] & 0xFF; |
103 | if (b >= 0xE0) { |
104 | b = (b & 0x0F) << 12; |
105 | b = b | (src[i++] & 0x3F) << 6; |
106 | b = b | (src[i++] & 0x3F); |
107 | } else if (b >= 0xC0) { |
108 | b = (b & 0x1F) << 6; |
109 | b = b | (src[i++] & 0x3F); |
110 | } |
111 | dst[j++] = (char)b; |
112 | } |
113 | return j; |
114 | } |
115 | |
116 | /** Return bytes in Utf8 representation as an array of characters. |
117 | * @param src The array holding the bytes. |
118 | * @param sindex The start index from which bytes are converted. |
119 | * @param len The maximum number of bytes to convert. |
120 | */ |
121 | public static char[] utf2chars(byte[] src, int sindex, int len) { |
122 | char[] dst = new char[len]; |
123 | int len1 = utf2chars(src, sindex, dst, 0, len); |
124 | char[] result = new char[len1]; |
125 | System.arraycopy(dst, 0, result, 0, len1); |
126 | return result; |
127 | } |
128 | |
129 | /** Return all bytes of a given array in Utf8 representation |
130 | * as an array of characters. |
131 | * @param src The array holding the bytes. |
132 | */ |
133 | public static char[] utf2chars(byte[] src) { |
134 | return utf2chars(src, 0, src.length); |
135 | } |
136 | |
137 | /** Return bytes in Utf8 representation as a string. |
138 | * @param src The array holding the bytes. |
139 | * @param sindex The start index from which bytes are converted. |
140 | * @param len The maximum number of bytes to convert. |
141 | */ |
142 | public static String utf2string(byte[] src, int sindex, int len) { |
143 | char dst[] = new char[len]; |
144 | int len1 = utf2chars(src, sindex, dst, 0, len); |
145 | return new String(dst, 0, len1); |
146 | } |
147 | |
148 | /** Return all bytes of a given array in Utf8 representation |
149 | * as a string. |
150 | * @param src The array holding the bytes. |
151 | */ |
152 | public static String utf2string(byte[] src) { |
153 | return utf2string(src, 0, src.length); |
154 | } |
155 | |
156 | /** Copy characters in source array to bytes in target array, |
157 | * converting them to Utf8 representation. |
158 | * The target array must be large enough to hold the result. |
159 | * returns first index in `dst' past the last copied byte. |
160 | * @param src The array holding the characters to convert. |
161 | * @param sindex The start index from which characters are converted. |
162 | * @param dst The array holding the converted characters.. |
163 | * @param dindex The start index from which converted bytes |
164 | * are written. |
165 | * @param len The maximum number of characters to convert. |
166 | */ |
167 | public static int chars2utf(char[] src, int sindex, |
168 | byte[] dst, int dindex, |
169 | int len) { |
170 | int j = dindex; |
171 | int limit = sindex + len; |
172 | for (int i = sindex; i < limit; i++) { |
173 | char ch = src[i]; |
174 | if (1 <= ch && ch <= 0x7F) { |
175 | dst[j++] = (byte)ch; |
176 | } else if (ch <= 0x7FF) { |
177 | dst[j++] = (byte)(0xC0 | (ch >> 6)); |
178 | dst[j++] = (byte)(0x80 | (ch & 0x3F)); |
179 | } else { |
180 | dst[j++] = (byte)(0xE0 | (ch >> 12)); |
181 | dst[j++] = (byte)(0x80 | ((ch >> 6) & 0x3F)); |
182 | dst[j++] = (byte)(0x80 | (ch & 0x3F)); |
183 | } |
184 | } |
185 | return j; |
186 | } |
187 | |
188 | /** Return characters as an array of bytes in Utf8 representation. |
189 | * @param src The array holding the characters. |
190 | * @param sindex The start index from which characters are converted. |
191 | * @param len The maximum number of characters to convert. |
192 | */ |
193 | public static byte[] chars2utf(char[] src, int sindex, int len) { |
194 | byte[] dst = new byte[len * 3]; |
195 | int len1 = chars2utf(src, sindex, dst, 0, len); |
196 | byte[] result = new byte[len1]; |
197 | System.arraycopy(dst, 0, result, 0, len1); |
198 | return result; |
199 | } |
200 | |
201 | /** Return all characters in given array as an array of bytes |
202 | * in Utf8 representation. |
203 | * @param src The array holding the characters. |
204 | */ |
205 | public static byte[] chars2utf(char[] src) { |
206 | return chars2utf(src, 0, src.length); |
207 | } |
208 | |
209 | /** Return string as an array of bytes in in Utf8 representation. |
210 | */ |
211 | public static byte[] string2utf(String s) { |
212 | return chars2utf(s.toCharArray()); |
213 | } |
214 | |
215 | /** |
216 | * Escapes each character in a string that has an escape sequence or |
217 | * is non-printable ASCII. Leaves non-ASCII characters alone. |
218 | */ |
219 | public static String quote(String s) { |
220 | StringBuilder buf = new StringBuilder(); |
221 | for (int i = 0; i < s.length(); i++) { |
222 | buf.append(quote(s.charAt(i))); |
223 | } |
224 | return buf.toString(); |
225 | } |
226 | |
227 | /** |
228 | * Escapes a character if it has an escape sequence or is |
229 | * non-printable ASCII. Leaves non-ASCII characters alone. |
230 | */ |
231 | public static String quote(char ch) { |
232 | switch (ch) { |
233 | case '\b': return "\\b"; |
234 | case '\f': return "\\f"; |
235 | case '\n': return "\\n"; |
236 | case '\r': return "\\r"; |
237 | case '\t': return "\\t"; |
238 | case '\'': return "\\'"; |
239 | case '\"': return "\\\""; |
240 | case '\\': return "\\\\"; |
241 | default: |
242 | return (ch > 127 || isPrintableAscii(ch)) |
243 | ? String.valueOf(ch) |
244 | : String.format("\\%03o", (int) ch); |
245 | } |
246 | } |
247 | |
248 | /** |
249 | * Is a character printable ASCII? |
250 | */ |
251 | private static boolean isPrintableAscii(char ch) { |
252 | return ch >= ' ' && ch <= '~'; |
253 | } |
254 | |
255 | /** Escape all unicode characters in string. |
256 | */ |
257 | public static String escapeUnicode(String s) { |
258 | int len = s.length(); |
259 | int i = 0; |
260 | while (i < len) { |
261 | char ch = s.charAt(i); |
262 | if (ch > 255) { |
263 | StringBuffer buf = new StringBuffer(); |
264 | buf.append(s.substring(0, i)); |
265 | while (i < len) { |
266 | ch = s.charAt(i); |
267 | if (ch > 255) { |
268 | buf.append("\\u"); |
269 | buf.append(Character.forDigit((ch >> 12) % 16, 16)); |
270 | buf.append(Character.forDigit((ch >> 8) % 16, 16)); |
271 | buf.append(Character.forDigit((ch >> 4) % 16, 16)); |
272 | buf.append(Character.forDigit((ch ) % 16, 16)); |
273 | } else { |
274 | buf.append(ch); |
275 | } |
276 | i++; |
277 | } |
278 | s = buf.toString(); |
279 | } else { |
280 | i++; |
281 | } |
282 | } |
283 | return s; |
284 | } |
285 | |
286 | /* Conversion routines for qualified name splitting |
287 | */ |
288 | /** Return the last part of a class name. |
289 | */ |
290 | public static Name shortName(Name classname) { |
291 | return classname.subName( |
292 | classname.lastIndexOf((byte)'.') + 1, classname.len); |
293 | } |
294 | |
295 | public static String shortName(String classname) { |
296 | return classname.substring(classname.lastIndexOf('.') + 1); |
297 | } |
298 | |
299 | /** Return the package name of a class name, excluding the trailing '.', |
300 | * "" if not existent. |
301 | */ |
302 | public static Name packagePart(Name classname) { |
303 | return classname.subName(0, classname.lastIndexOf((byte)'.')); |
304 | } |
305 | |
306 | public static String packagePart(String classname) { |
307 | int lastDot = classname.lastIndexOf('.'); |
308 | return (lastDot < 0 ? "" : classname.substring(0, lastDot)); |
309 | } |
310 | |
311 | public static List<Name> enclosingCandidates(Name name) { |
312 | List<Name> names = List.nil(); |
313 | int index; |
314 | while ((index = name.lastIndexOf((byte)'$')) > 0) { |
315 | name = name.subName(0, index); |
316 | names = names.prepend(name); |
317 | } |
318 | return names; |
319 | } |
320 | } |