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#include "json_utils.h" |
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namespace node { |
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std::string EscapeJsonChars(const std::string& str) { |
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const std::string control_symbols[0x20] = { |
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"\\u0000", "\\u0001", "\\u0002", "\\u0003", "\\u0004", "\\u0005", |
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"\\u0006", "\\u0007", "\\b", "\\t", "\\n", "\\v", "\\f", "\\r", |
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"\\u000e", "\\u000f", "\\u0010", "\\u0011", "\\u0012", "\\u0013", |
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"\\u0014", "\\u0015", "\\u0016", "\\u0017", "\\u0018", "\\u0019", |
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"\\u001a", "\\u001b", "\\u001c", "\\u001d", "\\u001e", "\\u001f" |
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}; |
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std::string ret; |
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size_t last_pos = 0; |
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size_t pos = 0; |
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for (; pos < str.size(); ++pos) { |
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std::string replace; |
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char ch = str[pos]; |
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if (ch == '\\') { |
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replace = "\\\\"; |
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} else if (ch == '\"') { |
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replace = "\\\""; |
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} else { |
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size_t num = static_cast<size_t>(ch); |
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if (num < 0x20) replace = control_symbols[num]; |
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} |
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if (!replace.empty()) { |
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if (pos > last_pos) { |
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ret += str.substr(last_pos, pos - last_pos); |
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} |
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last_pos = pos + 1; |
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ret += replace; |
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} |
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} |
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// Append any remaining symbols. |
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if (last_pos < str.size()) { |
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ret += str.substr(last_pos, pos - last_pos); |
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} |
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return ret; |
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} |
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std::string Reindent(const std::string& str, int indent_depth) { |
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if (indent_depth <= 0) return str; |
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const std::string indent(indent_depth, ' '); |
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std::string out; |
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std::string::size_type pos = 0; |
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for (;;) { |
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std::string::size_type prev_pos = pos; |
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pos = str.find('\n', pos); |
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out.append(indent); |
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if (pos == std::string::npos) { |
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out.append(str, prev_pos, std::string::npos); |
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break; |
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} else { |
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pos++; |
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out.append(str, prev_pos, pos - prev_pos); |
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} |
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} |
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return out; |
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} |
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} // namespace node |