19f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver/* 29f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * Copyright 2012, Google Inc. 39f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * All rights reserved. 49f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * 59f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * Redistribution and use in source and binary forms, with or without 69f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * modification, are permitted provided that the following conditions are 79f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * met: 89f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * 99f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * * Redistributions of source code must retain the above copyright 109f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * notice, this list of conditions and the following disclaimer. 119f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * * Redistributions in binary form must reproduce the above 129f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * copyright notice, this list of conditions and the following disclaimer 139f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * in the documentation and/or other materials provided with the 149f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * distribution. 159f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * * Neither the name of Google Inc. nor the names of its 169f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * contributors may be used to endorse or promote products derived from 179f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * this software without specific prior written permission. 189f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * 199f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 209f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 219f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 229f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 239f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 249f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 259f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 269f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 279f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 289f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 299f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 309f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver */ 319f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 329f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruverpackage org.jf.util; 339f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 349f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruverimport java.io.IOException; 359f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruverimport java.io.Writer; 369f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 379f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruverpublic class StringUtils { 389f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver public static void writeEscapedChar(Writer writer, char c) throws IOException { 399f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c >= ' ') && (c < 0x7f)) { 409f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c == '\'') || (c == '\"') || (c == '\\')) { 419f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write('\\'); 429f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 439f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(c); 449f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver return; 459f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } else if (c <= 0x7f) { 469f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver switch (c) { 479f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\n': writer.write("\\n"); return; 489f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\r': writer.write("\\r"); return; 499f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\t': writer.write("\\t"); return; 509f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 519f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 529f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 539f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write("\\u"); 549f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit(c >> 12, 16)); 559f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit((c >> 8) & 0x0f, 16)); 569f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit((c >> 4) & 0x0f, 16)); 579f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit(c & 0x0f, 16)); 589f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 599f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 609f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver public static void writeEscapedString(Writer writer, String value) throws IOException { 619f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver for (int i = 0; i < value.length(); i++) { 629f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver char c = value.charAt(i); 639f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 649f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c >= ' ') && (c < 0x7f)) { 659f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c == '\'') || (c == '\"') || (c == '\\')) { 669f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write('\\'); 679f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 689f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(c); 699f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver continue; 709f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } else if (c <= 0x7f) { 719f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver switch (c) { 729f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\n': writer.write("\\n"); continue; 739f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\r': writer.write("\\r"); continue; 749f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\t': writer.write("\\t"); continue; 759f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 769f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 779f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 789f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write("\\u"); 799f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit(c >> 12, 16)); 809f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit((c >> 8) & 0x0f, 16)); 819f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit((c >> 4) & 0x0f, 16)); 829f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver writer.write(Character.forDigit(c & 0x0f, 16)); 839f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 849f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 859f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 869f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver public static String escapeString(String value) { 879f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver int len = value.length(); 889f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver StringBuilder sb = new StringBuilder(len * 3 / 2); 899f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 909f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver for (int i = 0; i < len; i++) { 919f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver char c = value.charAt(i); 929f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 939f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c >= ' ') && (c < 0x7f)) { 949f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver if ((c == '\'') || (c == '\"') || (c == '\\')) { 959f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append('\\'); 969f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 979f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append(c); 989f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver continue; 999f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } else if (c <= 0x7f) { 1009f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver switch (c) { 1019f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\n': sb.append("\\n"); continue; 1029f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\r': sb.append("\\r"); continue; 1039f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver case '\t': sb.append("\\t"); continue; 1049f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 1059f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 1069f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 1079f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append("\\u"); 1089f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append(Character.forDigit(c >> 12, 16)); 1099f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append(Character.forDigit((c >> 8) & 0x0f, 16)); 1109f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append(Character.forDigit((c >> 4) & 0x0f, 16)); 1119f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver sb.append(Character.forDigit(c & 0x0f, 16)); 1129f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 1139f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver 1149f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver return sb.toString(); 1159f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver } 1169f1d05eb44d85183651753d9b83ae3115a8ea256Ben Gruver} 117