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Mini Shell
Mini Shell
#include "embedded_data.h"
#include <vector>
namespace node {
std::string ToOctalString(const uint8_t ch) {
// We can print most printable characters directly. The exceptions are '\'
// (escape characters), " (would end the string), and ? (trigraphs). The
// latter may be overly conservative: we compile with C++17 which doesn't
// support trigraphs.
if (ch >= ' ' && ch <= '~' && ch != '\\' && ch != '"' && ch != '?') {
return std::string(1, static_cast<char>(ch));
}
// All other characters are blindly output as octal.
const char c0 = '0' + ((ch >> 6) & 7);
const char c1 = '0' + ((ch >> 3) & 7);
const char c2 = '0' + (ch & 7);
return std::string("\\") + c0 + c1 + c2;
}
std::vector<std::string> GetOctalTable() {
size_t size = 1 << 8;
std::vector<std::string> code_table(size);
for (size_t i = 0; i < size; ++i) {
code_table[i] = ToOctalString(static_cast<uint8_t>(i));
}
return code_table;
}
const std::string& GetOctalCode(uint8_t index) {
static std::vector<std::string> table = GetOctalTable();
return table[index];
}
} // namespace node
Zerion Mini Shell 1.0