Function collectUniqueCodepoints

lib/EpdFont/SdCardFont.cpp:48–66

Walks a null-terminated UTF-8 string and appends each unique codepoint to codepoints[0..cpCount-1] via O(n²) dedup. Returns true if the buffer reached maxCount (cap hit), false if all codepoints fit.

// codepoints[0..cpCount-1] via O(n²) dedup.  Returns true if the buffer
// reached maxCount (cap hit), false if all codepoints fit.
bool collectUniqueCodepoints(const char* text, uint32_t* codepoints, uint32_t& cpCount, uint32_t maxCount) {
  const unsigned char* p = reinterpret_cast<const unsigned char*>(text);
  while (*p) {
    uint32_t cp = utf8NextCodepoint(&p);
    if (cp == 0) break;
    bool found = false;
    for (uint32_t i = 0; i < cpCount; i++) {
      if (codepoints[i] == cp) {
        found = true;
        break;
      }
    }
    if (!found) {
      if (cpCount >= maxCount) return true;
      codepoints[cpCount++] = cp;
    }
  }
  return false;
}

const char* asCStr(const std::string& s) { return s.c_str(); }
const char* asCStr(const char* s) { return s; }