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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "string_escape.h"
#include <vespa/vespalib/stllike/asciistream.h>
#include <vector>
#include <ostream>
namespace vespalib {
namespace {
std::vector<bool> precompute_escaped_xml_chars() {
std::vector<bool> vec(256, false);
for (uint32_t i=0; i<32; ++i) {
vec[i] = true;
}
vec['\n'] = false;
vec['<'] = true;
vec['>'] = true;
vec['&'] = true;
return vec;
}
std::vector<bool> escaped_xml_chars = precompute_escaped_xml_chars();
template <typename StreamT>
void do_write_xml_content_escaped(StreamT& out, vespalib::stringref str) {
for (const char s : str) {
if (escaped_xml_chars[static_cast<uint8_t>(s)]) {
if (s == '<') out << "<";
else if (s == '>') out << ">";
else if (s == '&') out << "&";
else {
out << "&#" << static_cast<int>(s) << ";";
}
} else {
out << s;
}
}
}
}
vespalib::string xml_attribute_escaped(vespalib::stringref str) {
vespalib::asciistream ost;
for (const char s : str) {
if (s == '"' || s == '\'' || s == '\n'
|| escaped_xml_chars[static_cast<uint8_t>(s)])
{
if (s == '<') ost << "<";
else if (s == '>') ost << ">";
else if (s == '&') ost << "&";
else if (s == '"') ost << """;
else if (s == '\'') ost << "'";
else {
ost << "&#" << static_cast<int>(s) << ";";
}
} else {
ost << s;
}
}
return ost.str();
}
vespalib::string xml_content_escaped(vespalib::stringref str) {
vespalib::asciistream out;
do_write_xml_content_escaped(out, str);
return out.str();
}
void write_xml_content_escaped(vespalib::asciistream& out, vespalib::stringref str) {
do_write_xml_content_escaped(out, str);
}
void write_xml_content_escaped(std::ostream& out, vespalib::stringref str) {
do_write_xml_content_escaped(out, str);
}
}
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