1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/javac/util/Convert.java Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,320 @@
1.4 +/*
1.5 + * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.javac.util;
1.30 +
1.31 +/** Utility class for static conversion methods between numbers
1.32 + * and strings in various formats.
1.33 + *
1.34 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If
1.35 + * you write code that depends on this, you do so at your own risk.
1.36 + * This code and its internal interfaces are subject to change or
1.37 + * deletion without notice.</b>
1.38 + */
1.39 +public class Convert {
1.40 +
1.41 + /** Convert string to integer.
1.42 + */
1.43 + public static int string2int(String s, int radix)
1.44 + throws NumberFormatException {
1.45 + if (radix == 10) {
1.46 + return Integer.parseInt(s, radix);
1.47 + } else {
1.48 + char[] cs = s.toCharArray();
1.49 + int limit = Integer.MAX_VALUE / (radix/2);
1.50 + int n = 0;
1.51 + for (int i = 0; i < cs.length; i++) {
1.52 + int d = Character.digit(cs[i], radix);
1.53 + if (n < 0 ||
1.54 + n > limit ||
1.55 + n * radix > Integer.MAX_VALUE - d)
1.56 + throw new NumberFormatException();
1.57 + n = n * radix + d;
1.58 + }
1.59 + return n;
1.60 + }
1.61 + }
1.62 +
1.63 + /** Convert string to long integer.
1.64 + */
1.65 + public static long string2long(String s, int radix)
1.66 + throws NumberFormatException {
1.67 + if (radix == 10) {
1.68 + return Long.parseLong(s, radix);
1.69 + } else {
1.70 + char[] cs = s.toCharArray();
1.71 + long limit = Long.MAX_VALUE / (radix/2);
1.72 + long n = 0;
1.73 + for (int i = 0; i < cs.length; i++) {
1.74 + int d = Character.digit(cs[i], radix);
1.75 + if (n < 0 ||
1.76 + n > limit ||
1.77 + n * radix > Long.MAX_VALUE - d)
1.78 + throw new NumberFormatException();
1.79 + n = n * radix + d;
1.80 + }
1.81 + return n;
1.82 + }
1.83 + }
1.84 +
1.85 +/* Conversion routines between names, strings, and byte arrays in Utf8 format
1.86 + */
1.87 +
1.88 + /** Convert `len' bytes from utf8 to characters.
1.89 + * Parameters are as in System.arraycopy
1.90 + * Return first index in `dst' past the last copied char.
1.91 + * @param src The array holding the bytes to convert.
1.92 + * @param sindex The start index from which bytes are converted.
1.93 + * @param dst The array holding the converted characters..
1.94 + * @param dindex The start index from which converted characters
1.95 + * are written.
1.96 + * @param len The maximum number of bytes to convert.
1.97 + */
1.98 + public static int utf2chars(byte[] src, int sindex,
1.99 + char[] dst, int dindex,
1.100 + int len) {
1.101 + int i = sindex;
1.102 + int j = dindex;
1.103 + int limit = sindex + len;
1.104 + while (i < limit) {
1.105 + int b = src[i++] & 0xFF;
1.106 + if (b >= 0xE0) {
1.107 + b = (b & 0x0F) << 12;
1.108 + b = b | (src[i++] & 0x3F) << 6;
1.109 + b = b | (src[i++] & 0x3F);
1.110 + } else if (b >= 0xC0) {
1.111 + b = (b & 0x1F) << 6;
1.112 + b = b | (src[i++] & 0x3F);
1.113 + }
1.114 + dst[j++] = (char)b;
1.115 + }
1.116 + return j;
1.117 + }
1.118 +
1.119 + /** Return bytes in Utf8 representation as an array of characters.
1.120 + * @param src The array holding the bytes.
1.121 + * @param sindex The start index from which bytes are converted.
1.122 + * @param len The maximum number of bytes to convert.
1.123 + */
1.124 + public static char[] utf2chars(byte[] src, int sindex, int len) {
1.125 + char[] dst = new char[len];
1.126 + int len1 = utf2chars(src, sindex, dst, 0, len);
1.127 + char[] result = new char[len1];
1.128 + System.arraycopy(dst, 0, result, 0, len1);
1.129 + return result;
1.130 + }
1.131 +
1.132 + /** Return all bytes of a given array in Utf8 representation
1.133 + * as an array of characters.
1.134 + * @param src The array holding the bytes.
1.135 + */
1.136 + public static char[] utf2chars(byte[] src) {
1.137 + return utf2chars(src, 0, src.length);
1.138 + }
1.139 +
1.140 + /** Return bytes in Utf8 representation as a string.
1.141 + * @param src The array holding the bytes.
1.142 + * @param sindex The start index from which bytes are converted.
1.143 + * @param len The maximum number of bytes to convert.
1.144 + */
1.145 + public static String utf2string(byte[] src, int sindex, int len) {
1.146 + char dst[] = new char[len];
1.147 + int len1 = utf2chars(src, sindex, dst, 0, len);
1.148 + return new String(dst, 0, len1);
1.149 + }
1.150 +
1.151 + /** Return all bytes of a given array in Utf8 representation
1.152 + * as a string.
1.153 + * @param src The array holding the bytes.
1.154 + */
1.155 + public static String utf2string(byte[] src) {
1.156 + return utf2string(src, 0, src.length);
1.157 + }
1.158 +
1.159 + /** Copy characters in source array to bytes in target array,
1.160 + * converting them to Utf8 representation.
1.161 + * The target array must be large enough to hold the result.
1.162 + * returns first index in `dst' past the last copied byte.
1.163 + * @param src The array holding the characters to convert.
1.164 + * @param sindex The start index from which characters are converted.
1.165 + * @param dst The array holding the converted characters..
1.166 + * @param dindex The start index from which converted bytes
1.167 + * are written.
1.168 + * @param len The maximum number of characters to convert.
1.169 + */
1.170 + public static int chars2utf(char[] src, int sindex,
1.171 + byte[] dst, int dindex,
1.172 + int len) {
1.173 + int j = dindex;
1.174 + int limit = sindex + len;
1.175 + for (int i = sindex; i < limit; i++) {
1.176 + char ch = src[i];
1.177 + if (1 <= ch && ch <= 0x7F) {
1.178 + dst[j++] = (byte)ch;
1.179 + } else if (ch <= 0x7FF) {
1.180 + dst[j++] = (byte)(0xC0 | (ch >> 6));
1.181 + dst[j++] = (byte)(0x80 | (ch & 0x3F));
1.182 + } else {
1.183 + dst[j++] = (byte)(0xE0 | (ch >> 12));
1.184 + dst[j++] = (byte)(0x80 | ((ch >> 6) & 0x3F));
1.185 + dst[j++] = (byte)(0x80 | (ch & 0x3F));
1.186 + }
1.187 + }
1.188 + return j;
1.189 + }
1.190 +
1.191 + /** Return characters as an array of bytes in Utf8 representation.
1.192 + * @param src The array holding the characters.
1.193 + * @param sindex The start index from which characters are converted.
1.194 + * @param len The maximum number of characters to convert.
1.195 + */
1.196 + public static byte[] chars2utf(char[] src, int sindex, int len) {
1.197 + byte[] dst = new byte[len * 3];
1.198 + int len1 = chars2utf(src, sindex, dst, 0, len);
1.199 + byte[] result = new byte[len1];
1.200 + System.arraycopy(dst, 0, result, 0, len1);
1.201 + return result;
1.202 + }
1.203 +
1.204 + /** Return all characters in given array as an array of bytes
1.205 + * in Utf8 representation.
1.206 + * @param src The array holding the characters.
1.207 + */
1.208 + public static byte[] chars2utf(char[] src) {
1.209 + return chars2utf(src, 0, src.length);
1.210 + }
1.211 +
1.212 + /** Return string as an array of bytes in in Utf8 representation.
1.213 + */
1.214 + public static byte[] string2utf(String s) {
1.215 + return chars2utf(s.toCharArray());
1.216 + }
1.217 +
1.218 + /**
1.219 + * Escapes each character in a string that has an escape sequence or
1.220 + * is non-printable ASCII. Leaves non-ASCII characters alone.
1.221 + */
1.222 + public static String quote(String s) {
1.223 + StringBuilder buf = new StringBuilder();
1.224 + for (int i = 0; i < s.length(); i++) {
1.225 + buf.append(quote(s.charAt(i)));
1.226 + }
1.227 + return buf.toString();
1.228 + }
1.229 +
1.230 + /**
1.231 + * Escapes a character if it has an escape sequence or is
1.232 + * non-printable ASCII. Leaves non-ASCII characters alone.
1.233 + */
1.234 + public static String quote(char ch) {
1.235 + switch (ch) {
1.236 + case '\b': return "\\b";
1.237 + case '\f': return "\\f";
1.238 + case '\n': return "\\n";
1.239 + case '\r': return "\\r";
1.240 + case '\t': return "\\t";
1.241 + case '\'': return "\\'";
1.242 + case '\"': return "\\\"";
1.243 + case '\\': return "\\\\";
1.244 + default:
1.245 + return (ch > 127 || isPrintableAscii(ch))
1.246 + ? String.valueOf(ch)
1.247 + : String.format("\\%03o", (int) ch);
1.248 + }
1.249 + }
1.250 +
1.251 + /**
1.252 + * Is a character printable ASCII?
1.253 + */
1.254 + private static boolean isPrintableAscii(char ch) {
1.255 + return ch >= ' ' && ch <= '~';
1.256 + }
1.257 +
1.258 + /** Escape all unicode characters in string.
1.259 + */
1.260 + public static String escapeUnicode(String s) {
1.261 + int len = s.length();
1.262 + int i = 0;
1.263 + while (i < len) {
1.264 + char ch = s.charAt(i);
1.265 + if (ch > 255) {
1.266 + StringBuffer buf = new StringBuffer();
1.267 + buf.append(s.substring(0, i));
1.268 + while (i < len) {
1.269 + ch = s.charAt(i);
1.270 + if (ch > 255) {
1.271 + buf.append("\\u");
1.272 + buf.append(Character.forDigit((ch >> 12) % 16, 16));
1.273 + buf.append(Character.forDigit((ch >> 8) % 16, 16));
1.274 + buf.append(Character.forDigit((ch >> 4) % 16, 16));
1.275 + buf.append(Character.forDigit((ch ) % 16, 16));
1.276 + } else {
1.277 + buf.append(ch);
1.278 + }
1.279 + i++;
1.280 + }
1.281 + s = buf.toString();
1.282 + } else {
1.283 + i++;
1.284 + }
1.285 + }
1.286 + return s;
1.287 + }
1.288 +
1.289 +/* Conversion routines for qualified name splitting
1.290 + */
1.291 + /** Return the last part of a class name.
1.292 + */
1.293 + public static Name shortName(Name classname) {
1.294 + return classname.subName(
1.295 + classname.lastIndexOf((byte)'.') + 1, classname.len);
1.296 + }
1.297 +
1.298 + public static String shortName(String classname) {
1.299 + return classname.substring(classname.lastIndexOf('.') + 1);
1.300 + }
1.301 +
1.302 + /** Return the package name of a class name, excluding the trailing '.',
1.303 + * "" if not existent.
1.304 + */
1.305 + public static Name packagePart(Name classname) {
1.306 + return classname.subName(0, classname.lastIndexOf((byte)'.'));
1.307 + }
1.308 +
1.309 + public static String packagePart(String classname) {
1.310 + int lastDot = classname.lastIndexOf('.');
1.311 + return (lastDot < 0 ? "" : classname.substring(0, lastDot));
1.312 + }
1.313 +
1.314 + public static List<Name> enclosingCandidates(Name name) {
1.315 + List<Name> names = List.nil();
1.316 + int index;
1.317 + while ((index = name.lastIndexOf((byte)'$')) > 0) {
1.318 + name = name.subName(0, index);
1.319 + names = names.prepend(name);
1.320 + }
1.321 + return names;
1.322 + }
1.323 +}
