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Diffstat (limited to 'subsonic-main/src/main/java/org/json/JSONTokener.java')
-rw-r--r-- | subsonic-main/src/main/java/org/json/JSONTokener.java | 446 |
1 files changed, 0 insertions, 446 deletions
diff --git a/subsonic-main/src/main/java/org/json/JSONTokener.java b/subsonic-main/src/main/java/org/json/JSONTokener.java deleted file mode 100644 index f323f6e6..00000000 --- a/subsonic-main/src/main/java/org/json/JSONTokener.java +++ /dev/null @@ -1,446 +0,0 @@ -package org.json; - -import java.io.BufferedReader; -import java.io.IOException; -import java.io.InputStream; -import java.io.InputStreamReader; -import java.io.Reader; -import java.io.StringReader; - -/* -Copyright (c) 2002 JSON.org - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -The Software shall be used for Good, not Evil. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. -*/ - -/** - * A JSONTokener takes a source string and extracts characters and tokens from - * it. It is used by the JSONObject and JSONArray constructors to parse - * JSON source strings. - * @author JSON.org - * @version 2011-11-24 - */ -public class JSONTokener { - - private int character; - private boolean eof; - private int index; - private int line; - private char previous; - private final Reader reader; - private boolean usePrevious; - - - /** - * Construct a JSONTokener from a Reader. - * - * @param reader A reader. - */ - public JSONTokener(Reader reader) { - this.reader = reader.markSupported() - ? reader - : new BufferedReader(reader); - this.eof = false; - this.usePrevious = false; - this.previous = 0; - this.index = 0; - this.character = 1; - this.line = 1; - } - - - /** - * Construct a JSONTokener from an InputStream. - */ - public JSONTokener(InputStream inputStream) throws JSONException { - this(new InputStreamReader(inputStream)); - } - - - /** - * Construct a JSONTokener from a string. - * - * @param s A source string. - */ - public JSONTokener(String s) { - this(new StringReader(s)); - } - - - /** - * Back up one character. This provides a sort of lookahead capability, - * so that you can test for a digit or letter before attempting to parse - * the next number or identifier. - */ - public void back() throws JSONException { - if (this.usePrevious || this.index <= 0) { - throw new JSONException("Stepping back two steps is not supported"); - } - this.index -= 1; - this.character -= 1; - this.usePrevious = true; - this.eof = false; - } - - - /** - * Get the hex value of a character (base16). - * @param c A character between '0' and '9' or between 'A' and 'F' or - * between 'a' and 'f'. - * @return An int between 0 and 15, or -1 if c was not a hex digit. - */ - public static int dehexchar(char c) { - if (c >= '0' && c <= '9') { - return c - '0'; - } - if (c >= 'A' && c <= 'F') { - return c - ('A' - 10); - } - if (c >= 'a' && c <= 'f') { - return c - ('a' - 10); - } - return -1; - } - - public boolean end() { - return this.eof && !this.usePrevious; - } - - - /** - * Determine if the source string still contains characters that next() - * can consume. - * @return true if not yet at the end of the source. - */ - public boolean more() throws JSONException { - this.next(); - if (this.end()) { - return false; - } - this.back(); - return true; - } - - - /** - * Get the next character in the source string. - * - * @return The next character, or 0 if past the end of the source string. - */ - public char next() throws JSONException { - int c; - if (this.usePrevious) { - this.usePrevious = false; - c = this.previous; - } else { - try { - c = this.reader.read(); - } catch (IOException exception) { - throw new JSONException(exception); - } - - if (c <= 0) { // End of stream - this.eof = true; - c = 0; - } - } - this.index += 1; - if (this.previous == '\r') { - this.line += 1; - this.character = c == '\n' ? 0 : 1; - } else if (c == '\n') { - this.line += 1; - this.character = 0; - } else { - this.character += 1; - } - this.previous = (char) c; - return this.previous; - } - - - /** - * Consume the next character, and check that it matches a specified - * character. - * @param c The character to match. - * @return The character. - * @throws JSONException if the character does not match. - */ - public char next(char c) throws JSONException { - char n = this.next(); - if (n != c) { - throw this.syntaxError("Expected '" + c + "' and instead saw '" + - n + "'"); - } - return n; - } - - - /** - * Get the next n characters. - * - * @param n The number of characters to take. - * @return A string of n characters. - * @throws JSONException - * Substring bounds error if there are not - * n characters remaining in the source string. - */ - public String next(int n) throws JSONException { - if (n == 0) { - return ""; - } - - char[] chars = new char[n]; - int pos = 0; - - while (pos < n) { - chars[pos] = this.next(); - if (this.end()) { - throw this.syntaxError("Substring bounds error"); - } - pos += 1; - } - return new String(chars); - } - - - /** - * Get the next char in the string, skipping whitespace. - * @throws JSONException - * @return A character, or 0 if there are no more characters. - */ - public char nextClean() throws JSONException { - for (;;) { - char c = this.next(); - if (c == 0 || c > ' ') { - return c; - } - } - } - - - /** - * Return the characters up to the next close quote character. - * Backslash processing is done. The formal JSON format does not - * allow strings in single quotes, but an implementation is allowed to - * accept them. - * @param quote The quoting character, either - * <code>"</code> <small>(double quote)</small> or - * <code>'</code> <small>(single quote)</small>. - * @return A String. - * @throws JSONException Unterminated string. - */ - public String nextString(char quote) throws JSONException { - char c; - StringBuffer sb = new StringBuffer(); - for (;;) { - c = this.next(); - switch (c) { - case 0: - case '\n': - case '\r': - throw this.syntaxError("Unterminated string"); - case '\\': - c = this.next(); - switch (c) { - case 'b': - sb.append('\b'); - break; - case 't': - sb.append('\t'); - break; - case 'n': - sb.append('\n'); - break; - case 'f': - sb.append('\f'); - break; - case 'r': - sb.append('\r'); - break; - case 'u': - sb.append((char)Integer.parseInt(this.next(4), 16)); - break; - case '"': - case '\'': - case '\\': - case '/': - sb.append(c); - break; - default: - throw this.syntaxError("Illegal escape."); - } - break; - default: - if (c == quote) { - return sb.toString(); - } - sb.append(c); - } - } - } - - - /** - * Get the text up but not including the specified character or the - * end of line, whichever comes first. - * @param delimiter A delimiter character. - * @return A string. - */ - public String nextTo(char delimiter) throws JSONException { - StringBuffer sb = new StringBuffer(); - for (;;) { - char c = this.next(); - if (c == delimiter || c == 0 || c == '\n' || c == '\r') { - if (c != 0) { - this.back(); - } - return sb.toString().trim(); - } - sb.append(c); - } - } - - - /** - * Get the text up but not including one of the specified delimiter - * characters or the end of line, whichever comes first. - * @param delimiters A set of delimiter characters. - * @return A string, trimmed. - */ - public String nextTo(String delimiters) throws JSONException { - char c; - StringBuffer sb = new StringBuffer(); - for (;;) { - c = this.next(); - if (delimiters.indexOf(c) >= 0 || c == 0 || - c == '\n' || c == '\r') { - if (c != 0) { - this.back(); - } - return sb.toString().trim(); - } - sb.append(c); - } - } - - - /** - * Get the next value. The value can be a Boolean, Double, Integer, - * JSONArray, JSONObject, Long, or String, or the JSONObject.NULL object. - * @throws JSONException If syntax error. - * - * @return An object. - */ - public Object nextValue() throws JSONException { - char c = this.nextClean(); - String string; - - switch (c) { - case '"': - case '\'': - return this.nextString(c); - case '{': - this.back(); - return new JSONObject(this); - case '[': - this.back(); - return new JSONArray(this); - } - - /* - * Handle unquoted text. This could be the values true, false, or - * null, or it can be a number. An implementation (such as this one) - * is allowed to also accept non-standard forms. - * - * Accumulate characters until we reach the end of the text or a - * formatting character. - */ - - StringBuffer sb = new StringBuffer(); - while (c >= ' ' && ",:]}/\\\"[{;=#".indexOf(c) < 0) { - sb.append(c); - c = this.next(); - } - this.back(); - - string = sb.toString().trim(); - if ("".equals(string)) { - throw this.syntaxError("Missing value"); - } - return JSONObject.stringToValue(string); - } - - - /** - * Skip characters until the next character is the requested character. - * If the requested character is not found, no characters are skipped. - * @param to A character to skip to. - * @return The requested character, or zero if the requested character - * is not found. - */ - public char skipTo(char to) throws JSONException { - char c; - try { - int startIndex = this.index; - int startCharacter = this.character; - int startLine = this.line; - this.reader.mark(Integer.MAX_VALUE); - do { - c = this.next(); - if (c == 0) { - this.reader.reset(); - this.index = startIndex; - this.character = startCharacter; - this.line = startLine; - return c; - } - } while (c != to); - } catch (IOException exc) { - throw new JSONException(exc); - } - - this.back(); - return c; - } - - - /** - * Make a JSONException to signal a syntax error. - * - * @param message The error message. - * @return A JSONException object, suitable for throwing - */ - public JSONException syntaxError(String message) { - return new JSONException(message + this.toString()); - } - - - /** - * Make a printable string of this JSONTokener. - * - * @return " at {index} [character {character} line {line}]" - */ - public String toString() { - return " at " + this.index + " [character " + this.character + " line " + - this.line + "]"; - } -}
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