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1.4 kB · 46 lines
C++
at master
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647#include "StringUtils.h"
#include <Utf8.h>
namespace StringUtils {
std::string sanitizeFilename(const std::string& name, size_t maxBytes) { std::string result; result.reserve(std::min(name.size(), maxBytes));
const auto* text = reinterpret_cast<const unsigned char*>(name.c_str());
// Skip leading spaces and dots so they don't consume the byte budget while (*text == ' ' || *text == '.') { text++; }
// Process full UTF-8 codepoints to avoid trimming in the middle of a multibyte sequence while (*text != 0) { const auto* cpStart = text; uint32_t cp = utf8NextCodepoint(&text);
if (cp == '/' || cp == '\\' || cp == ':' || cp == '*' || cp == '?' || cp == '"' || cp == '<' || cp == '>' || cp == '|') { // Replace illegal and control characters with '_' if (result.length() + 1 > maxBytes) break; result += '_'; } else if (cp >= 128 || (cp >= 32 && cp < 127)) { const size_t cpBytes = text - cpStart; if (result.length() + cpBytes > maxBytes) break; result.append(reinterpret_cast<const char*>(cpStart), cpBytes); } }
// Trim trailing spaces and dots size_t end = result.find_last_not_of(" ."); if (end != std::string::npos) { result.resize(end + 1); } else { result.clear(); }
return result.empty() ? "book" : result;}
} // namespace StringUtils