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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fileconfigformatter.h"
#include <vespa/vespalib/stllike/asciistream.h>
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/vespalib/data/simple_buffer.h>
#include <cmath>
#include <vector>
#include <vespa/log/log.h>
LOG_SETUP(".config.print.fileconfigformatter");
using namespace vespalib::slime::convenience;
using vespalib::slime::ArrayTraverser;
using vespalib::slime::ObjectTraverser;
using vespalib::OutputWriter;
using vespalib::SimpleBuffer;
using vespalib::Output;
namespace config {
void doEncode(ConfigDataBuffer & buffer, Output & output);
}
namespace {
struct ConfigEncoder : public ArrayTraverser,
public ObjectTraverser
{
OutputWriter &out;
int level;
bool head;
std::vector<std::string> prefixList;
ConfigEncoder(OutputWriter &out_in)
: out(out_in), level(0), head(true) {}
void printPrefix() {
for (size_t i = 0; i < prefixList.size(); i++) {
out.printf("%s", prefixList[i].c_str());
}
}
void encodeBOOL(bool value) {
if (value) {
out.printf("true");
} else {
out.printf("false");
}
}
void encodeLONG(int64_t value) {
out.printf("%" PRId64, value);
}
void encodeDOUBLE(double value) {
out.printf("%g", value);
}
void encodeSTRINGNOQUOTE(const Memory &memory) {
const char *hex = "0123456789ABCDEF";
char *p = out.reserve(memory.size * 6);
size_t len = 0;
const char *pos = memory.data;
const char *end = memory.data + memory.size;
for (; pos < end; ++pos) {
uint8_t c = *pos;
switch(c) {
case '"': *p++ = '\\'; *p++ = '"'; len += 2; break;
case '\\': *p++ = '\\'; *p++ = '\\'; len += 2; break;
case '\b': *p++ = '\\'; *p++ = 'b'; len += 2; break;
case '\f': *p++ = '\\'; *p++ = 'f'; len += 2; break;
case '\n': *p++ = '\\'; *p++ = 'n'; len += 2; break;
case '\r': *p++ = '\\'; *p++ = 'r'; len += 2; break;
case '\t': *p++ = '\\'; *p++ = 't'; len += 2; break;
default:
if (c > 0x1f) {
*p++ = c; ++len;
} else { // requires escaping according to RFC 4627
*p++ = '\\'; *p++ = 'u'; *p++ = '0'; *p++ = '0';
*p++ = hex[(c >> 4) & 0xf]; *p++ = hex[c & 0xf];
len += 6;
}
}
}
out.commit(len);
}
void encodeSTRING(const Memory &memory) {
out.write('\"');
encodeSTRINGNOQUOTE(memory);
out.write('\"');
}
void encodeARRAY(const Inspector &inspector) {
ArrayTraverser &array_traverser = *this;
inspector.traverse(array_traverser);
}
void encodeMAP(const Inspector & inspector) {
for (size_t i = 0; i < inspector.children(); i++) {
const Inspector & child(inspector[i]);
vespalib::asciistream ss;
ss << "{\"" << child["key"].asString().make_string() << "\"}";
prefixList.push_back(ss.str());
encodeMAPEntry(child);
prefixList.pop_back();
}
}
void encodeMAPEntry(const Inspector & inspector) {
if (inspector["type"].valid()) {
std::string type(inspector["type"].asString().make_string());
if (type.compare("struct") == 0) {
prefixList.push_back(".");
encodeOBJECT(inspector["value"]);
prefixList.pop_back();
} else {
printPrefix();
out.write(' ');
if (type.compare("enum") == 0) encodeSTRINGNOQUOTE(inspector["value"].asString());
else encodeValue(inspector["value"]);
out.write('\n');
}
}
}
void encodeOBJECT(const Inspector &inspector) {
ObjectTraverser &object_traverser = *this;
inspector.traverse(object_traverser);
}
void encodeValue(const Inspector &inspector) {
switch (inspector.type().getId()) {
case vespalib::slime::BOOL::ID: return encodeBOOL(inspector.asBool());
case vespalib::slime::LONG::ID: return encodeLONG(inspector.asLong());
case vespalib::slime::DOUBLE::ID: return encodeDOUBLE(inspector.asDouble());
case vespalib::slime::STRING::ID: return encodeSTRING(inspector.asString());
case vespalib::slime::ARRAY::ID: return encodeARRAY(inspector);
case vespalib::slime::OBJECT::ID: return encodeOBJECT(inspector);
case vespalib::slime::NIX::ID: return;
}
LOG_ABORT("should not be reached"); // should not be reached
}
void entry(size_t idx, const Inspector &inspector) override;
void field(const Memory &symbol_name, const Inspector &inspector) override;
static void encode(Inspector & root, OutputWriter &out) {
ConfigEncoder encoder(out);
encoder.encodeValue(root);
}
};
void
ConfigEncoder::entry(size_t index, const Inspector &inspector)
{
if (inspector["type"].valid()) {
std::string type(inspector["type"].asString().make_string());
if (type.compare("array") == 0) {
vespalib::asciistream ss;
ss << "[" << index << "]";
prefixList.push_back(ss.str());
encodeARRAY(inspector["value"]);
prefixList.pop_back();
} else if (type.compare("struct") == 0) {
vespalib::asciistream ss;
ss << "[" << index << "].";
prefixList.push_back(ss.str());
encodeOBJECT(inspector["value"]);
prefixList.pop_back();
} else {
printPrefix();
out.write('[');
encodeLONG(index);
out.write(']');
out.write(' ');
if (type.compare("enum") == 0) encodeSTRINGNOQUOTE(inspector["value"].asString());
else encodeValue(inspector["value"]);
out.write('\n');
}
}
}
void
ConfigEncoder::field(const Memory &symbol_name, const Inspector &inspector)
{
if (inspector["type"].valid()) {
std::string type(inspector["type"].asString().make_string());
if (type.compare("array") == 0) {
size_t len = inspector["value"].children();
if (len > 0) {
prefixList.push_back(symbol_name.make_string());
encodeARRAY(inspector["value"]);
prefixList.pop_back();
}
} else if (type.compare("map") == 0) {
size_t len = inspector["value"].children();
if (len > 0) {
prefixList.push_back(symbol_name.make_string());
encodeMAP(inspector["value"]);
prefixList.pop_back();
}
} else if (type.compare("struct") == 0) {
prefixList.push_back(symbol_name.make_string() + ".");
encodeOBJECT(inspector["value"]);
prefixList.pop_back();
} else {
printPrefix();
encodeSTRINGNOQUOTE(symbol_name);
out.write(' ');
if (type.compare("enum") == 0) encodeSTRINGNOQUOTE(inspector["value"].asString());
else encodeValue(inspector["value"]);
out.write('\n');
}
}
}
}
namespace config {
void
doEncode(ConfigDataBuffer & buffer, Output & output)
{
OutputWriter out(output, 8000);
ConfigEncoder::encode(buffer.slimeObject().get()["configPayload"], out);
}
void
FileConfigFormatter::encode(ConfigDataBuffer & buffer) const
{
SimpleBuffer buf;
doEncode(buffer, buf);
buffer.setEncodedString(buf.get().make_string());
}
size_t
FileConfigFormatter::decode(ConfigDataBuffer & buffer) const
{
(void) buffer;
throw vespalib::IllegalArgumentException("Reading cfg format is not supported");
return 0;
}
} // namespace config
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