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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "featurenamebuilder.h"
#include "featurenameparser.h"
namespace {
// ref: http://en.wikipedia.org/wiki/ASCII
// note: we also consider space to be printable
bool isPrintable(char c) {
return (static_cast<unsigned char>(c) >= 32 &&
static_cast<unsigned char>(c) <= 126);
}
bool isSpace(char c) {
switch (c) {
case ' ':
case '\t':
case '\n':
case '\r':
case '\f':
return true;
default:
return false;
}
}
bool isBlank(const vespalib::string &str) {
for (uint32_t i = 0; i < str.size(); ++i) {
if (!isSpace(str[i])) {
return false;
}
}
return true;
}
void appendQuoted(char c, vespalib::string &str) {
switch (c) {
case '\\':
str.append("\\\\");
break;
case '"':
str.append("\\\"");
break;
case '\t':
str.append("\\t");
break;
case '\n':
str.append("\\n");
break;
case '\r':
str.append("\\r");
break;
case '\f':
str.append("\\f");
break;
default:
if (isPrintable(c)) {
str.push_back(c);
} else {
const char *lookup = "0123456789abcdef";
str.append("\\x");
str.push_back(lookup[(c >> 4) & 0xf]);
str.push_back(lookup[c & 0xf]);
}
}
}
vespalib::string quoteString(const vespalib::string &str)
{
vespalib::string res;
res.push_back('"');
for (uint32_t i = 0; i < str.size(); ++i) {
appendQuoted(str[i], res);
}
res.push_back('"');
return res;
}
} // namespace <unnamed>
namespace search::fef {
FeatureNameBuilder::FeatureNameBuilder()
: _baseName(),
_parameters(),
_output()
{
}
FeatureNameBuilder::~FeatureNameBuilder() = default;
FeatureNameBuilder &
FeatureNameBuilder::baseName(const vespalib::string &str)
{
_baseName = str;
return *this;
}
FeatureNameBuilder &
FeatureNameBuilder::parameter(const vespalib::string &str, bool exact)
{
if (str.empty() || (!exact && isBlank(str))) {
_parameters.push_back("");
} else {
FeatureNameParser parser(str);
if (!parser.valid() || (exact && str != parser.featureName())) {
_parameters.push_back(quoteString(str));
} else {
_parameters.push_back(parser.featureName());
}
}
return *this;
}
FeatureNameBuilder &
FeatureNameBuilder::clearParameters()
{
_parameters.resize(0);
return *this;
}
FeatureNameBuilder &
FeatureNameBuilder::output(const vespalib::string &str)
{
_output = str;
return *this;
}
vespalib::string
FeatureNameBuilder::buildName() const
{
vespalib::string ret;
if (!_baseName.empty()) {
ret = _baseName;
if (!_parameters.empty()) {
ret += "(";
for (uint32_t i = 0; i < _parameters.size(); ++i) {
if (i > 0) {
ret += ",";
}
ret += _parameters[i];
}
ret += ")";
}
if (!_output.empty()) {
ret += ".";
ret += _output;
}
}
return ret;
}
}
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