| 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 | } |