| package edu.illinois.ncsa.daffodil.processors |
| |
| /* Copyright (c) 2012-2013 Tresys Technology, LLC. All rights reserved. |
| * |
| * Developed by: Tresys Technology, LLC |
| * http://www.tresys.com |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of |
| * this software and associated documentation files (the "Software"), to deal with |
| * 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: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimers. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimers in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * 3. Neither the names of Tresys Technology, nor the names of its contributors |
| * may be used to endorse or promote products derived from this Software |
| * without specific prior written permission. |
| * |
| * 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 |
| * CONTRIBUTORS 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 WITH THE |
| * SOFTWARE. |
| */ |
| |
| import edu.illinois.ncsa.daffodil.dsom.DFDLAssert |
| import edu.illinois.ncsa.daffodil.dsom.DFDLDiscriminator |
| import edu.illinois.ncsa.daffodil.dsom.DFDLSetVariable |
| import edu.illinois.ncsa.daffodil.dsom.ElementBase |
| import edu.illinois.ncsa.daffodil.grammar.Gram |
| import edu.illinois.ncsa.daffodil.grammar.NamedGram |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TestKind |
| import edu.illinois.ncsa.daffodil.exceptions.Assert |
| import edu.illinois.ncsa.daffodil.dsom.ElementBase |
| import edu.illinois.ncsa.daffodil.exceptions.UnsuppressableException |
| import edu.illinois.ncsa.daffodil.dsom.R |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TextNumberJustification |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TextTrimKind |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TextStringJustification |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TextBooleanJustification |
| import edu.illinois.ncsa.daffodil.schema.annotation.props.gen.TextCalendarJustification |
| import edu.illinois.ncsa.daffodil.dsom.ElementBase |
| import edu.illinois.ncsa.daffodil.grammar.Terminal |
| import edu.illinois.ncsa.daffodil.util._ |
| import edu.illinois.ncsa.daffodil.dsom.DiagnosticUtils._ |
| |
| abstract class SpecifiedLengthCombinatorBase(val e: ElementBase, eGram: => Gram) |
| extends Terminal(e, true) |
| with RuntimeExplicitLengthMixin[Long] { |
| // extends NamedGram(e) { |
| |
| // requiredEvaluations(eGram) // Note: not really required for grammar objects. |
| // The eGram is only required if the grammar clause actually ends up spliced |
| // into the final grammar, and we can't tell that here, so whether the egram |
| // ends up evaluated or not really has to happen in the application logic. |
| |
| val eParser = eGram.parser |
| |
| def kind: String |
| |
| def toBriefXML(depthLimit: Int = -1): String = { |
| if (depthLimit == 0) "..." else |
| "<SpecifiedLength" + kind + ">" + |
| eParser.toBriefXML(depthLimit - 1) + |
| "</SpecifiedLength" + kind + ">" |
| } |
| |
| } |
| |
| class SpecifiedLengthPattern(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "Pattern" |
| |
| def parser: Parser = new SpecifiedLengthPatternParser(this, e) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitBitsFixed(e: ElementBase, eGram: => Gram, nBits: Long) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitBitsFixed" |
| |
| def parser: Parser = new SpecifiedLengthExplicitBitsFixedParser(this, e, nBits) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitBits(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitBits" |
| |
| def parser: Parser = new SpecifiedLengthExplicitBitsParser(this, e) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitBytesFixed(e: ElementBase, eGram: => Gram, nBytes: Long) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitBytesFixed" |
| |
| def parser: Parser = new SpecifiedLengthExplicitBytesFixedParser(this, e, nBytes) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitBytes(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitBytes" |
| |
| def parser: Parser = new SpecifiedLengthExplicitBytesParser(this, e) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitCharactersFixed(e: ElementBase, eGram: => Gram, nChars: Long) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitCharactersFixed" |
| |
| def parser: Parser = new SpecifiedLengthExplicitCharactersFixedParser(this, e, nChars) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| class SpecifiedLengthExplicitCharacters(e: ElementBase, eGram: => Gram) |
| extends SpecifiedLengthCombinatorBase(e, eGram) { |
| |
| val kind = "ExplicitCharacters" |
| |
| def parser: Parser = new SpecifiedLengthExplicitCharactersParser(this, e) |
| def unparser: Unparser = new DummyUnparser(e) |
| |
| } |
| |
| abstract class SpecifiedLengthParserBase(combinator: SpecifiedLengthCombinatorBase, |
| e: ElementBase) |
| extends PrimParser(combinator, e) |
| with WithParseErrorThrowing { |
| |
| def toBriefXML = combinator.toBriefXML _ |
| |
| final def parse(pstate: PState, endBitPos: Long, e: ElementBase) = { |
| log(LogLevel.Debug, "Limiting data to %s bits.", endBitPos) |
| val postState1 = pstate.withEndBitLimit(endBitPos) |
| val postState2 = combinator.eParser.parse1(postState1, e) |
| |
| log(LogLevel.Debug, "Restoring data limit to %s bits.", pstate.bitLimit) |
| |
| val postState3 = postState2.withEndBitLimit(pstate.bitLimit) |
| val finalState = postState3.status match { |
| case Success => { |
| // Check that the parsed length is less than or equal to the length of the parent |
| //Assert.invariant(postState2.bitPos <= endBitPos) |
| this.PECheck(postState2.bitPos <= endBitPos, "The parsed length of the children was greater than that of the parent.") |
| postState3.withPos(endBitPos, -1, None) |
| } |
| case _ => postState3 |
| } |
| finalState |
| } |
| |
| } |
| |
| class SpecifiedLengthPatternParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| val pattern = e.lengthPattern |
| |
| if(!e.isScannable) e.SDE("Element %s does not meet the requirements of Pattern-Based lengths and Scanability.\nThe element and its children must be representation='text' and share the same encoding.", e.prettyName) |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| val in = start.inStream |
| |
| val reader = in.getCharReader(charset, start.bitPos) |
| val d = new DelimParser(e.knownEncodingStringBitLengthFunction) |
| val result = d.parseInputPatterned(pattern, reader) |
| val endBitPos = |
| result match { |
| case _: DelimParseFailure => start.bitPos + 0 // no match == length is zero! |
| case s: DelimParseSuccess => start.bitPos + s.numBits |
| } |
| val postEState = parse(start, endBitPos, e) |
| postEState |
| } |
| } |
| |
| class SpecifiedLengthExplicitBitsParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| val expr = e.length |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val (pState, nBits) = combinator.getBitLength(start) |
| val in = pState.inStream |
| |
| try { |
| val nBytes = scala.math.ceil(nBits / 8.0).toLong |
| val bytes = in.getBytes(pState.bitPos, nBytes) |
| val endBitPos = pState.bitPos + nBits |
| val postEState = parse(pState, endBitPos, e) |
| return postEState |
| } catch { |
| case ex: IndexOutOfBoundsException => { |
| // Insufficient bytes in field, but we need to still allow processing |
| // to test for Nils |
| val endBitPos = start.bitPos + 0 |
| val postEState = parse(start, endBitPos, e) |
| return postEState |
| } |
| case u: UnsuppressableException => throw u |
| case e: Exception => { return PE(pState, "SpecifiedLengthExplicitBitsParser - Exception: \n%s", e.getStackTraceString) } |
| } |
| } |
| } |
| |
| class SpecifiedLengthExplicitBitsFixedParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase, nBits: Long) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val in = start.inStream |
| |
| try { |
| val nBytes = scala.math.ceil(nBits / 8.0).toLong |
| val bytes = in.getBytes(start.bitPos, nBytes) |
| val endBitPos = start.bitPos + nBits |
| val postEState = parse(start, endBitPos, e) |
| return postEState |
| } catch { |
| case ex: IndexOutOfBoundsException => { |
| // Insufficient bits in field, but we need to still allow processing |
| // to test for Nils |
| val endBitPos = start.bitPos + 0 |
| val postEState = parse(start, endBitPos, e) |
| return postEState |
| } |
| case u: UnsuppressableException => throw u |
| case ex: Exception => { return PE(start, "SpecifiedLengthExplicitBitsFixedParser - Exception: \n%s", ex.getStackTraceString) } |
| } |
| } |
| } |
| |
| class SpecifiedLengthExplicitBytesParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| val expr = e.length |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val (pState, nBytes) = combinator.getLength(start) |
| val in = pState.inStream |
| |
| try { |
| val bytes = in.getBytes(pState.bitPos, nBytes) |
| val endBitPos = pState.bitPos + (nBytes * 8) |
| val postEState = parse(pState, endBitPos, e) |
| return postEState |
| } catch { |
| case ex: IndexOutOfBoundsException => { |
| // Insufficient bytes in field, but we need to still allow processing |
| // to test for Nils |
| val endBitPos = start.bitPos + 0 |
| val postEState = parse(start, endBitPos, e) |
| return postEState |
| } |
| case u: UnsuppressableException => throw u |
| case ex: Exception => { return PE(pState, "SpecifiedLengthExplicitBytesParser - Exception: \n%s", ex.getStackTraceString) } |
| } |
| } |
| } |
| |
| class SpecifiedLengthExplicitBytesFixedParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase, nBytes: Long) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val in = start.inStream |
| |
| try { |
| // val bytes = in.getBytes(start.bitPos, nBytes) |
| val endBitPos = start.bitPos + (nBytes * 8) |
| val postEState = super.parse(start, endBitPos, e) |
| return postEState |
| } catch { |
| case ex: IndexOutOfBoundsException => { |
| // Insufficient bytes in field, but we need to still allow processing |
| // to test for Nils |
| val endBitPos = start.bitPos + 0 |
| val postEState = super.parse(start, endBitPos, e) |
| return postEState |
| } |
| case u: UnsuppressableException => throw u |
| case ex: Exception => { return PE(start, "SpecifiedLengthExplicitBytesFixedParser - Exception: \n%s", ex.getStackTraceString) } |
| } |
| } |
| } |
| |
| class SpecifiedLengthExplicitCharactersFixedParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase, nChars: Long) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val in = start.inStream |
| val rdr = in.getCharReader(charset, start.bitPos) |
| val d = new DelimParser(e.knownEncodingStringBitLengthFunction) |
| val result = d.parseInputNCharacters(nChars, rdr, TextJustificationType.None, "") |
| val endBitPos = |
| result match { |
| case _: DelimParseFailure => start.bitPos + 0 // no match == length is zero! |
| case s: DelimParseSuccess => start.bitPos + s.numBits |
| } |
| val postEState = parse(start, endBitPos, e) |
| postEState |
| } |
| } |
| |
| class SpecifiedLengthExplicitCharactersParser(combinator: SpecifiedLengthCombinatorBase, e: ElementBase) |
| extends SpecifiedLengthParserBase(combinator, e) { |
| |
| val charset = e.knownEncodingCharset |
| val expr = e.length |
| |
| def parse(start: PState): PState = withParseErrorThrowing(start) { |
| |
| val (pState, nChars) = combinator.getLength(start) |
| val in = pState.inStream |
| val rdr = in.getCharReader(charset, pState.bitPos) |
| val d = new DelimParser(e.knownEncodingStringBitLengthFunction) |
| val result = d.parseInputNCharacters(nChars, rdr, TextJustificationType.None, "") |
| val endBitPos = |
| result match { |
| case _: DelimParseFailure => pState.bitPos + 0 // no match == length is zero! |
| case s: DelimParseSuccess => pState.bitPos + s.numBits |
| } |
| val postEState = parse(pState, endBitPos, e) |
| postEState |
| } |
| } |
| |