/
CGenerator.java
executable file
·2378 lines (2105 loc) · 87.2 KB
/
CGenerator.java
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/*
* Copyright 2013-2019 Real Logic Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package uk.co.real_logic.sbe.generation.c;
import org.agrona.Verify;
import org.agrona.generation.OutputManager;
import uk.co.real_logic.sbe.PrimitiveType;
import uk.co.real_logic.sbe.generation.CodeGenerator;
import uk.co.real_logic.sbe.generation.Generators;
import uk.co.real_logic.sbe.ir.Encoding;
import uk.co.real_logic.sbe.ir.Ir;
import uk.co.real_logic.sbe.ir.Signal;
import uk.co.real_logic.sbe.ir.Token;
import java.io.IOException;
import java.io.Writer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
import static uk.co.real_logic.sbe.generation.c.CUtil.*;
import static uk.co.real_logic.sbe.ir.GenerationUtil.*;
@SuppressWarnings("MethodLength")
public class CGenerator implements CodeGenerator
{
private final Ir ir;
private final OutputManager outputManager;
public CGenerator(final Ir ir, final OutputManager outputManager)
{
Verify.notNull(ir, "ir");
Verify.notNull(outputManager, "outputManager");
this.ir = ir;
this.outputManager = outputManager;
}
public void generateMessageHeaderStub() throws IOException
{
generateComposite(ir.namespaces(), ir.headerStructure().tokens());
}
public List<String> generateTypeStubs(final CharSequence[] scope) throws IOException
{
final List<String> typesToInclude = new ArrayList<>();
for (final List<Token> tokens : ir.types())
{
switch (tokens.get(0).signal())
{
case BEGIN_ENUM:
generateEnum(scope, tokens);
break;
case BEGIN_SET:
generateChoiceSet(scope, tokens);
break;
case BEGIN_COMPOSITE:
generateComposite(scope, tokens);
break;
}
typesToInclude.add(tokens.get(0).applicableTypeName());
}
return typesToInclude;
}
public List<String> generateTypesToIncludes(final List<Token> tokens)
{
final List<String> typesToInclude = new ArrayList<>();
for (final Token token : tokens)
{
switch (token.signal())
{
case BEGIN_ENUM:
case BEGIN_SET:
case BEGIN_COMPOSITE:
typesToInclude.add(token.applicableTypeName());
break;
}
}
return typesToInclude;
}
public void generate() throws IOException
{
generateMessageHeaderStub();
final List<String> typesToInclude = generateTypeStubs(ir.namespaces());
for (final List<Token> tokens : ir.messages())
{
final Token msgToken = tokens.get(0);
try (Writer out = outputManager.createOutput(formatName(msgToken.name())))
{
final String structName = formatScopedName(ir.namespaces(), msgToken.name());
out.append(generateFileHeader(structName, typesToInclude));
final List<Token> messageBody = tokens.subList(1, tokens.size() - 1);
int i = 0;
final List<Token> fields = new ArrayList<>();
i = collectFields(messageBody, i, fields);
final List<Token> groups = new ArrayList<>();
i = collectGroups(messageBody, i, groups);
final List<Token> varData = new ArrayList<>();
collectVarData(messageBody, i, varData);
out.append(generateMessageFlyweightStruct(structName));
out.append(String.format("\n" +
"enum %1$s_meta_attribute\n" +
"{\n" +
" %1$s_meta_attribute_EPOCH,\n" +
" %1$s_meta_attribute_TIME_UNIT,\n" +
" %1$s_meta_attribute_SEMANTIC_TYPE,\n" +
" %1$s_meta_attribute_PRESENCE\n" +
"};\n\n" +
"union %1$s_float_as_uint\n" +
"{\n" +
" float fp_value;\n" +
" uint32_t uint_value;\n" +
"};\n\n" +
"union %1$s_double_as_uint\n" +
"{\n" +
" double fp_value;\n" +
" uint64_t uint_value;\n" +
"};\n\n" +
"struct %1$s_string_view\n" +
"{\n" +
" const char* data;\n" +
" size_t length;\n" +
"};\n",
structName));
out.append(generateMessageFlyweightFunctions(structName, msgToken, ir.namespaces()));
out.append(generateFieldFunctions(ir.namespaces(), structName, structName, fields));
final StringBuilder sb = new StringBuilder();
generateGroups(sb, ir.namespaces(), groups, structName, structName);
out.append(sb);
out.append(generateVarData(structName, structName, varData));
out.append("\n#endif\n");
}
}
}
private void generateGroups(
final StringBuilder sb,
final CharSequence[] scope,
final List<Token> tokens,
final String outerStruct,
final String outermostStruct)
{
for (int i = 0, size = tokens.size(); i < size; ++i)
{
final Token groupToken = tokens.get(i);
if (groupToken.signal() != Signal.BEGIN_GROUP)
{
throw new IllegalStateException("tokens must begin with BEGIN_GROUP: token=" + groupToken);
}
final String groupName = outerStruct + '_' + formatName(groupToken.name());
final Token numInGroupToken = Generators.findFirst("numInGroup", tokens, i);
final String cTypeForNumInGroup = cTypeName(numInGroupToken.encoding().primitiveType());
generateGroupStruct(sb, scope, groupName, tokens, i);
generateGroupHeaderFunctions(sb, scope, groupName, tokens, i);
++i;
final int groupHeaderTokenCount = tokens.get(i).componentTokenCount();
i += groupHeaderTokenCount;
final List<Token> fields = new ArrayList<>();
i = collectFields(tokens, i, fields);
sb.append(generateFieldFunctions(scope, groupName, outermostStruct, fields));
final List<Token> groups = new ArrayList<>();
i = collectGroups(tokens, i, groups);
generateGroups(sb, scope, groups, groupName, outermostStruct);
final List<Token> varData = new ArrayList<>();
i = collectVarData(tokens, i, varData);
sb.append(generateVarData(groupName, outermostStruct, varData));
sb.append(generateGroupPropertyFunctions(outerStruct, groupName, groupToken, cTypeForNumInGroup));
}
}
private static void generateGroupStruct(
final StringBuilder sb,
final CharSequence[] scope,
final String groupName,
final List<Token> tokens,
final int index)
{
final String dimensionsStructName = formatScopedName(scope, tokens.get(index + 1).name());
sb.append(String.format("\n" +
"struct %1$s\n" +
"{\n" +
" char *buffer;\n" +
" uint64_t buffer_length;\n" +
" uint64_t *position_ptr;\n" +
" uint64_t block_length;\n" +
" uint64_t count;\n" +
" uint64_t index;\n" +
" uint64_t offset;\n" +
" uint64_t acting_version;\n" +
" struct %2$s dimensions;\n" +
"};\n",
groupName, dimensionsStructName));
}
private static void generateGroupHeaderFunctions(
final StringBuilder sb,
final CharSequence[] scope,
final String groupName,
final List<Token> tokens,
final int index)
{
final String dimensionsStructName = formatScopedName(scope, tokens.get(index + 1).name());
final int dimensionHeaderLength = tokens.get(index + 1).encodedLength();
final int blockLength = tokens.get(index).encodedLength();
final Token blockLengthToken = Generators.findFirst("blockLength", tokens, index);
final Token numInGroupToken = Generators.findFirst("numInGroup", tokens, index);
final String cTypeForBlockLength = cTypeName(blockLengthToken.encoding().primitiveType());
final String cTypeForNumInGroup = cTypeName(numInGroupToken.encoding().primitiveType());
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t *%1$s_sbe_position_ptr(struct %1$s *const codec)\n" +
"{\n" +
" return codec->position_ptr;\n" +
"}\n\n" +
"SBE_ONE_DEF struct %1$s *%1$s_wrap_for_decode(\n" +
" struct %1$s *const codec,\n" +
" char *const buffer,\n" +
" uint64_t *const pos,\n" +
" const uint64_t acting_version,\n" +
" const uint64_t buffer_length)\n" +
"{\n" +
" codec->buffer = buffer;\n" +
" codec->buffer_length = buffer_length;\n" +
" if (!%2$s_wrap(&codec->dimensions, codec->buffer, *pos, acting_version, buffer_length))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" codec->block_length = %2$s_blockLength(&codec->dimensions);\n" +
" codec->count = %2$s_numInGroup(&codec->dimensions);\n" +
" codec->index = -1;\n" +
" codec->acting_version = acting_version;\n" +
" codec->position_ptr = pos;\n" +
" *codec->position_ptr = *codec->position_ptr + %3$d;\n" +
" return codec;\n" +
"}\n",
groupName, dimensionsStructName, dimensionHeaderLength));
final long minCount = numInGroupToken.encoding().applicableMinValue().longValue();
final String minCheck = minCount > 0 ? "count < " + minCount + " || " : "";
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %1$s *%1$s_wrap_for_encode(\n" +
" struct %1$s *const codec,\n" +
" char *const buffer,\n" +
" const %4$s count,\n" +
" uint64_t *const pos,\n" +
" const uint64_t acting_version,\n" +
" const uint64_t buffer_length)\n" +
"{\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic push\n" +
"#pragma GCC diagnostic ignored \"-Wtype-limits\"\n" +
"#endif\n" +
" if (%7$scount > %8$d)\n" +
" {\n" +
" errno = E110;\n" +
" return NULL;\n" +
" }\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic pop\n" +
"#endif\n" +
" codec->buffer = buffer;\n" +
" codec->buffer_length = buffer_length;\n" +
" if (!%5$s_wrap(&codec->dimensions, codec->buffer, *pos, acting_version, buffer_length))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" %5$s_set_blockLength(&codec->dimensions, (%2$s)%3$d);\n" +
" %5$s_set_numInGroup(&codec->dimensions, (%4$s)count);\n" +
" codec->index = -1;\n" +
" codec->count = count;\n" +
" codec->block_length = %3$d;\n" +
" codec->acting_version = acting_version;\n" +
" codec->position_ptr = pos;\n" +
" *codec->position_ptr = *codec->position_ptr + %6$d;\n" +
" return codec;\n" +
"}\n",
groupName, cTypeForBlockLength, blockLength, cTypeForNumInGroup,
dimensionsStructName, dimensionHeaderLength,
minCheck,
numInGroupToken.encoding().applicableMaxValue().longValue()));
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t %3$s_sbe_header_size(void)\n" +
"{\n" +
" return %1$d;\n" +
"}\n\n" +
"SBE_ONE_DEF uint64_t %3$s_sbe_block_length(void)\n" +
"{\n" +
" return %2$d;\n" +
"}\n\n" +
"SBE_ONE_DEF uint64_t %3$s_sbe_position(const struct %3$s *const codec)\n" +
"{\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic push\n" +
"#pragma GCC diagnostic ignored \"-Wmaybe-uninitialized\"\n" +
"#endif\n" +
" return *codec->position_ptr;\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic pop\n" +
"#endif\n" +
"}\n\n" +
"SBE_ONE_DEF bool %3$s_set_sbe_position(struct %3$s *const codec, const uint64_t position)\n" +
"{\n" +
" if (SBE_BOUNDS_CHECK_EXPECT((position > codec->buffer_length), false))\n" +
" {\n" +
" errno = E100;\n" +
" return false;\n" +
" }\n" +
" *codec->position_ptr = position;\n" +
" return true;\n" +
"}\n\n" +
"SBE_ONE_DEF uint64_t %3$s_count(const struct %3$s *const codec)\n" +
"{\n" +
" return codec->count;\n" +
"}\n\n" +
"SBE_ONE_DEF bool %3$s_has_next(const struct %3$s *const codec)\n" +
"{\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic push\n" +
"#pragma GCC diagnostic ignored \"-Wmaybe-uninitialized\"\n" +
"#endif\n" +
" return codec->index + 1 < codec->count;\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic pop\n" +
"#endif\n" +
"}\n\n" +
"SBE_ONE_DEF struct %3$s *%3$s_next(struct %3$s *const codec)\n" +
"{\n" +
" codec->offset = *codec->position_ptr;\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic push\n" +
"#pragma GCC diagnostic ignored \"-Wmaybe-uninitialized\"\n" +
"#endif\n" +
" if (SBE_BOUNDS_CHECK_EXPECT(((codec->offset + codec->block_length) " +
"> codec->buffer_length), false))\n" +
"#if defined(__GNUG__) && !defined(__clang__)\n" +
"#pragma GCC diagnostic pop\n" +
"#endif\n" +
" {\n" +
" errno = E108;\n" +
" return NULL;\n" +
" }\n" +
" *codec->position_ptr = codec->offset + codec->block_length;\n" +
" ++codec->index;\n\n" +
" return codec;\n" +
"}\n\n" +
"SBE_ONE_DEF struct %3$s *%3$s_for_each(\n" +
" struct %3$s *const codec,\n" +
" void (*func)(struct %3$s *, void *),\n" +
" void *const context)\n" +
"{\n" +
" while (%3$s_has_next(codec))\n" +
" {\n" +
" if (!%3$s_next(codec))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" func(codec, context);\n" +
" }\n" +
" return codec;\n" +
"}\n",
dimensionHeaderLength, blockLength, groupName));
}
private static CharSequence generateGroupPropertyFunctions(
final String outerStruct, final String groupName, final Token token, final String cTypeForNumInGroup)
{
final StringBuilder sb = new StringBuilder();
final String propertyName = formatPropertyName(token.name());
sb.append(String.format("\n" +
"SBE_ONE_DEF uint16_t %1$s_id(void)\n" +
"{\n" +
" return %2$d;\n" +
"}\n",
groupName,
token.id()));
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %2$s *%1$s_get_%3$s(\n" +
" struct %1$s *const codec, struct %2$s *const property)\n" +
"{\n" +
" return %2$s_wrap_for_decode(\n" +
" property,\n" +
" codec->buffer,\n" +
" %1$s_sbe_position_ptr(codec),\n" +
" codec->acting_version,\n" +
" codec->buffer_length);\n" +
"}\n",
outerStruct,
groupName,
propertyName));
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %2$s *%2$s_set_count(\n" +
" struct %1$s *const codec, struct %2$s *const property, const %3$s count)\n" +
"{\n" +
" return %2$s_wrap_for_encode(\n" +
" property,\n" +
" codec->buffer,\n" +
" count,\n" +
" %1$s_sbe_position_ptr(codec),\n" +
" codec->acting_version,\n" +
" codec->buffer_length);\n" +
"}\n",
outerStruct,
groupName,
cTypeForNumInGroup));
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t %2$s_since_version(void)\n" +
"{\n" +
" return %3$d;\n" +
"}\n\n" +
"SBE_ONE_DEF bool %2$s_in_acting_version(const struct %1$s *const codec)\n" +
"{\n" +
"#if defined(__clang__)\n" +
"#pragma clang diagnostic push\n" +
"#pragma clang diagnostic ignored \"-Wtautological-compare\"\n" +
"#endif\n" +
" return codec->acting_version >= %2$s_since_version();\n" +
"#if defined(__clang__)\n" +
"#pragma clang diagnostic pop\n" +
"#endif\n" +
"}\n",
outerStruct,
groupName,
token.version()));
return sb;
}
private CharSequence generateVarData(
final String structName,
final String outermostStruct,
final List<Token> tokens)
{
final StringBuilder sb = new StringBuilder();
for (int i = 0, size = tokens.size(); i < size;)
{
final Token token = tokens.get(i);
if (token.signal() != Signal.BEGIN_VAR_DATA)
{
throw new IllegalStateException("tokens must begin with BEGIN_VAR_DATA: token=" + token);
}
final String propertyName = formatPropertyName(token.name());
final Token lengthToken = Generators.findFirst("length", tokens, i);
final Token varDataToken = Generators.findFirst("varData", tokens, i);
final String characterEncoding = varDataToken.encoding().characterEncoding();
final int lengthOfLengthField = lengthToken.encodedLength();
final String lengthCType = cTypeName(lengthToken.encoding().primitiveType());
final String lengthByteOrderStr = formatByteOrderEncoding(
lengthToken.encoding().byteOrder(), lengthToken.encoding().primitiveType());
generateFieldMetaAttributeFunction(sb, token, structName, outermostStruct);
generateVarDataDescriptors(
sb, token, propertyName, characterEncoding, lengthToken,
lengthOfLengthField, lengthCType, structName);
sb.append(String.format("\n" +
"SBE_ONE_DEF const char *%6$s_%1$s(struct %6$s *const codec)\n" +
"{\n" +
"%2$s" +
" %4$s length_field_value;\n" +
" memcpy(&length_field_value, codec->buffer + %6$s_sbe_position(codec), sizeof(%4$s));\n" +
" const char *field_ptr = (codec->buffer + %6$s_sbe_position(codec) + %3$d);\n" +
" if (!%6$s_set_sbe_position(\n" +
" codec, %6$s_sbe_position(codec) + %3$d + %5$s(length_field_value)))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" return field_ptr;\n" +
"}\n",
propertyName,
generateTypeFieldNotPresentCondition(token.version()),
lengthOfLengthField,
lengthCType,
lengthByteOrderStr,
structName));
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t %6$s_get_%1$s(\n" +
" struct %6$s *const codec,\n" +
" char *dst,\n" +
" const uint64_t length)\n" +
"{\n" +
"%2$s" +
" uint64_t length_of_length_field = %3$d;\n" +
" uint64_t length_position = %6$s_sbe_position(codec);\n" +
" if (!%6$s_set_sbe_position(codec, length_position + length_of_length_field))\n" +
" {\n" +
" return 0;\n" +
" }\n" +
" %5$s length_field_value;\n" +
" memcpy(&length_field_value, codec->buffer + length_position, sizeof(%5$s));\n" +
" uint64_t data_length = %4$s(length_field_value);\n" +
" uint64_t bytes_to_copy = length < data_length ? length : data_length;\n" +
" uint64_t pos = %6$s_sbe_position(codec);\n" +
" if (!%6$s_set_sbe_position(codec, pos + data_length))\n" +
" {\n" +
" return 0;\n" +
" }\n" +
" memcpy(dst, codec->buffer + pos, bytes_to_copy);\n" +
" return bytes_to_copy;\n" +
"}\n",
propertyName,
generateArrayFieldNotPresentCondition(token.version()),
lengthOfLengthField,
lengthByteOrderStr,
lengthCType,
structName));
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %6$s_string_view %5$s_get_%1$s_as_string_view(struct %5$s *const codec)\n" +
"{\n" +
"%2$s" +
" %4$s length_field_value = %5$s_%1$s_length(codec);\n" +
" const char *field_ptr = codec->buffer + %5$s_sbe_position(codec) + %3$d;\n" +
" if (!%5$s_set_sbe_position(\n" +
" codec, %5$s_sbe_position(codec) + %3$d + length_field_value))\n" +
" {\n" +
" struct %6$s_string_view ret = {NULL, 0};\n" +
" return ret;\n" +
" }\n" +
" struct %6$s_string_view ret = {field_ptr, length_field_value};\n" +
" return ret;\n" +
"}\n",
propertyName,
generateStringViewNotPresentCondition(token.version()),
lengthOfLengthField,
lengthCType,
structName,
outermostStruct));
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %5$s *%5$s_put_%1$s(\n" +
" struct %5$s *const codec,\n" +
" const char *src,\n" +
" const %3$s length)\n" +
"{\n" +
" uint64_t length_of_length_field = %2$d;\n" +
" uint64_t length_position = %5$s_sbe_position(codec);\n" +
" %3$s length_field_value = %4$s(length);\n" +
" if (!%5$s_set_sbe_position(codec, length_position + length_of_length_field))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" memcpy(codec->buffer + length_position, &length_field_value, sizeof(%3$s));\n" +
" uint64_t pos = %5$s_sbe_position(codec);\n" +
" if (!%5$s_set_sbe_position(codec, pos + length))\n" +
" {\n" +
" return NULL;\n" +
" }\n" +
" memcpy(codec->buffer + pos, src, length);\n" +
" return codec;\n" +
"}\n",
propertyName,
lengthOfLengthField,
lengthCType,
lengthByteOrderStr,
structName));
i += token.componentTokenCount();
}
return sb;
}
private void generateVarDataDescriptors(
final StringBuilder sb,
final Token token,
final String propertyName,
final String characterEncoding,
final Token lengthToken,
final Integer sizeOfLengthField,
final String lengthCType,
final String structName)
{
final String fullyQualifiedPropertyName = structName + "_" + propertyName;
sb.append(String.format("\n" +
"SBE_ONE_DEF const char *%s_character_encoding(void)\n" +
"{\n" +
" return \"%s\";\n" +
"}\n",
fullyQualifiedPropertyName,
characterEncoding));
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t %1$s_since_version(void)\n" +
"{\n" +
" return %2$d;\n" +
"}\n\n" +
"SBE_ONE_DEF bool %1$s_in_acting_version(const struct %4$s *const codec)\n" +
"{\n" +
"#if defined(__clang__)\n" +
"#pragma clang diagnostic push\n" +
"#pragma clang diagnostic ignored \"-Wtautological-compare\"\n" +
"#endif\n" +
" return codec->acting_version >= %1$s_since_version();\n" +
"#if defined(__clang__)\n" +
"#pragma clang diagnostic pop\n" +
"#endif\n" +
"}\n\n" +
"SBE_ONE_DEF uint16_t %1$s_id(void)\n" +
"{\n" +
" return %3$d;\n" +
"}\n",
fullyQualifiedPropertyName,
token.version(),
token.id(),
structName));
sb.append(String.format("\n" +
"SBE_ONE_DEF uint64_t %s_header_length(void)\n" +
"{\n" +
" return %d;\n" +
"}\n",
fullyQualifiedPropertyName,
sizeOfLengthField));
sb.append(String.format("\n" +
"SBE_ONE_DEF %4$s %1$s_length(const struct %5$s *const codec)\n" +
"{\n" +
"%2$s" +
" %4$s length;\n" +
" memcpy(&length, codec->buffer + %5$s_sbe_position(codec), sizeof(%4$s));\n" +
" return %3$s(length);\n" +
"}\n",
fullyQualifiedPropertyName,
generateArrayFieldNotPresentCondition(token.version()),
formatByteOrderEncoding(lengthToken.encoding().byteOrder(), lengthToken.encoding().primitiveType()),
lengthCType,
structName));
}
private void generateChoiceSet(final CharSequence[] scope, final List<Token> tokens) throws IOException
{
final Token bitsetToken = tokens.get(0);
try (Writer out = outputManager.createOutput(formatName(bitsetToken.applicableTypeName())))
{
final String bitSetName = formatScopedName(scope, bitsetToken.applicableTypeName());
out.append(generateFileHeader(bitSetName, null));
out.append(generateFixedFlyweightStruct(bitSetName));
out.append(generateFixedFlyweightCodeFunctions(bitSetName, bitsetToken.encodedLength()));
out.append(String.format("\n" +
"SBE_ONE_DEF struct %1$s *%1$s_clear(struct %1$s *const codec)\n" +
"{\n" +
" %2$s zero = 0;\n" +
" memcpy(codec->buffer + codec->offset, &zero, sizeof(%2$s));\n" +
" return codec;\n" +
"}\n",
bitSetName,
cTypeName(bitsetToken.encoding().primitiveType())));
out.append(String.format("\n" +
"SBE_ONE_DEF bool %1$s_is_empty(const struct %1$s *const codec)\n" +
"{\n" +
" %2$s val;\n" +
" memcpy(&val, codec->buffer + codec->offset, sizeof(%2$s));\n" +
" return 0 == val;\n" +
"}\n",
bitSetName,
cTypeName(bitsetToken.encoding().primitiveType())));
out.append(generateChoices(bitSetName, tokens.subList(1, tokens.size() - 1)));
out.append("\n#endif\n");
}
}
private void generateEnum(final CharSequence[] scope, final List<Token> tokens) throws IOException
{
final Token enumToken = tokens.get(0);
try (Writer out = outputManager.createOutput(formatName(enumToken.applicableTypeName())))
{
final String enumName = formatScopedName(scope, enumToken.applicableTypeName());
out.append(generateFileHeader(enumName, null));
out.append(generateEnumValues(scope, tokens.subList(1, tokens.size() - 1), enumToken));
out.append(generateEnumLookupFunction(scope, tokens.subList(1, tokens.size() - 1), enumToken));
out.append("\n#endif\n");
}
}
private void generateComposite(final CharSequence[] scope, final List<Token> tokens) throws IOException
{
final Token compositeToken = tokens.get(0);
try (Writer out = outputManager.createOutput(formatName(compositeToken.applicableTypeName())))
{
final String compositeName = formatScopedName(scope, compositeToken.applicableTypeName());
out.append(generateFileHeader(
compositeName,
generateTypesToIncludes(tokens.subList(1, tokens.size() - 1))));
out.append(generateFixedFlyweightStruct(compositeName));
out.append(String.format("\n" +
"enum %1$s_meta_attribute\n" +
"{\n" +
" %1$s_meta_attribute_EPOCH,\n" +
" %1$s_meta_attribute_TIME_UNIT,\n" +
" %1$s_meta_attribute_SEMANTIC_TYPE,\n" +
" %1$s_meta_attribute_PRESENCE\n" +
"};\n\n" +
"union %1$s_float_as_uint\n" +
"{\n" +
" float fp_value;\n" +
" uint32_t uint_value;\n" +
"};\n\n" +
"union %1$s_double_as_uint\n" +
"{\n" +
" double fp_value;\n" +
" uint64_t uint_value;\n" +
"};\n\n" +
"struct %1$s_string_view\n" +
"{\n" +
" const char* data;\n" +
" size_t length;\n" +
"};\n",
compositeName));
out.append(generateFixedFlyweightCodeFunctions(compositeName, compositeToken.encodedLength()));
out.append(generateCompositePropertyFunctions(
scope, compositeName, tokens.subList(1, tokens.size() - 1)));
out.append("\n#endif\n");
}
}
private static CharSequence generateChoiceNotPresentCondition(final int sinceVersion)
{
if (0 == sinceVersion)
{
return "";
}
return String.format(
"if (codec->acting_version < %1$d)\n" +
"{\n" +
" return false;\n" +
"}\n\n",
sinceVersion);
}
private CharSequence generateChoices(final String bitsetStructName, final List<Token> tokens)
{
final StringBuilder sb = new StringBuilder();
tokens
.stream()
.filter((token) -> token.signal() == Signal.CHOICE)
.forEach((token) ->
{
final String choiceName = formatPropertyName(token.name());
final String typeName = cTypeName(token.encoding().primitiveType());
final String choiceBitPosition = token.encoding().constValue().toString();
final String byteOrderStr = formatByteOrderEncoding(
token.encoding().byteOrder(), token.encoding().primitiveType());
sb.append(String.format("\n" +
"SBE_ONE_DEF bool %1$s_check_%2$s_bit(const %3$s bits)\n" +
"{\n" +
" return (bits & ((%3$s)1 << %4$s)) != 0;\n" +
"}\n",
bitsetStructName,
choiceName,
typeName,
choiceBitPosition));
sb.append(String.format("\n" +
"SBE_ONE_DEF %3$s %1$s_apply_%2$s_bit(const %3$s bits, const bool value)\n" +
"{\n" +
" return value ?" +
" (bits | ((%3$s)1 << %4$s)) : (bits & ~((%3$s)1 << %4$s));\n" +
"}\n",
bitsetStructName,
choiceName,
typeName,
choiceBitPosition));
sb.append(String.format("\n" +
"SBE_ONE_DEF bool %1$s_%2$s(const struct %1$s *const codec)\n" +
"{\n" +
"%3$s" +
" %5$s val;\n" +
" memcpy(&val, codec->buffer + codec->offset, sizeof(%5$s));\n" +
" return (%4$s(val) & ((%5$s)1 << %6$s)) != 0;\n" +
"}\n",
bitsetStructName,
choiceName,
generateChoiceNotPresentCondition(token.version()),
byteOrderStr,
typeName,
choiceBitPosition));
sb.append(String.format("\n" +
"SBE_ONE_DEF struct %1$s *%1$s_set_%2$s(struct %1$s *const codec, const bool value)\n" +
"{\n" +
" %3$s bits;\n" +
" memcpy(&bits, codec->buffer + codec->offset, sizeof(%3$s));\n" +
" bits = %4$s(value ?" +
" (%4$s(bits) | ((%3$s)1 << %5$s)) " +
": (%4$s(bits) & ~((%3$s)1 << %5$s)));\n" +
" memcpy(codec->buffer + codec->offset, &bits, sizeof(%3$s));\n" +
" return codec;\n" +
"}\n",
bitsetStructName,
choiceName,
typeName,
byteOrderStr,
choiceBitPosition));
});
return sb;
}
private CharSequence generateEnumValues(
final CharSequence[] scope,
final List<Token> tokens,
final Token encodingToken)
{
final StringBuilder sb = new StringBuilder();
final Encoding encoding = encodingToken.encoding();
final String enumName = formatScopedName(scope, encodingToken.applicableTypeName());
sb.append(String.format("\n" +
"enum %1$s\n" +
"{\n",
enumName));
for (final Token token : tokens)
{
final CharSequence constVal = generateLiteral(
token.encoding().primitiveType(), token.encoding().constValue().toString());
sb.append(String.format(
" %s_%s = %s,\n",
enumName,
token.name(),
constVal));
}
sb.append(String.format(
" %s_NULL_VALUE = %s\n",
enumName,
generateLiteral(encoding.primitiveType(), encoding.applicableNullValue().toString())));
sb.append("};\n\n");
return sb;
}
private static CharSequence generateEnumLookupFunction(
final CharSequence[] scope,
final List<Token> tokens,
final Token encodingToken)
{
final String enumName = formatScopedName(scope, encodingToken.applicableTypeName());
final StringBuilder sb = new StringBuilder();
sb.append(String.format(
"SBE_ONE_DEF bool %1$s_get(const %2$s value, enum %1$s *const out)\n" +
"{\n" +
" switch (value)\n" +
" {\n",
enumName,
cTypeName(tokens.get(0).encoding().primitiveType())));
for (final Token token : tokens)
{
sb.append(String.format(
" case %s:\n" +
" *out = %s_%s;\n" +
" return true;\n",
token.encoding().constValue().toString(),
enumName,
token.name()));
}
sb.append(String.format(
" case %s:\n" +
" *out = %s_NULL_VALUE;\n" +
" return true;\n" +
" }\n\n" +
" errno = E103;\n" +
" return false;\n" +
"}\n",
encodingToken.encoding().applicableNullValue().toString(),
enumName));
return sb;
}
private CharSequence generateFieldNotPresentCondition(
final int sinceVersion, final Encoding encoding)
{
if (0 == sinceVersion)
{
return "";
}
return String.format(
"if (codec->acting_version < %1$d)\n" +
"{\n" +
" return %2$s;\n" +
"}\n\n",
sinceVersion,
generateLiteral(encoding.primitiveType(), encoding.applicableNullValue().toString()));
}
private static CharSequence generateArrayFieldNotPresentCondition(final int sinceVersion)
{
if (0 == sinceVersion)
{
return "";
}
return String.format(
"if (codec->acting_version < %1$d)\n" +
"{\n" +
" return 0;\n" +
"}\n\n",
sinceVersion);
}
private static CharSequence generateStringViewNotPresentCondition(final int sinceVersion)
{
if (0 == sinceVersion)
{
return "";
}