62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
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//! See [Houdini](https://github.com/vmg/houdini/blob/master/houdini_html_e.c) for where this code
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//! originally came from.
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#include <base/html_escape.hpp>
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// clang-format off
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constexpr static u8 HTML_ESCAPE_TABLE[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 1, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 4,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 6, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
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constexpr static std::string_view HTML_ESCAPES[] = {
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"",
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""",
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"&",
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"'",
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"/",
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"<",
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">"
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};
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// clang-format on
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namespace base {
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std::string HtmlEscape(const std::span<u8> input) {
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std::string out;
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// TODO: rewrite this underlying implementation to be
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// UTF-8 safe, so we can allow UTF-8 input.
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for(auto& c : input) {
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const u8 escape = HTML_ESCAPE_TABLE[c];
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if(escape == 0) {
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out.push_back(c);
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} else {
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out += HTML_ESCAPES[escape];
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}
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}
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return out;
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}
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std::string HtmlEscape(const std::string_view input) {
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return HtmlEscape(std::span<u8> { std::bit_cast<u8*>(input.data()), input.length() });
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}
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std::string HtmlEscape(const std::string& input) {
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return HtmlEscape(std::span<u8> { std::bit_cast<u8*>(input.data()), input.length() });
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}
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} // namespace base
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