Function fill_buffer_with_pattern

cpp/src/gandiva/precompiled/string_ops.cc:2029–2043

Fill a buffer with repeated fill_text using O(log n) doubling strategy

// Fill a buffer with repeated fill_text using O(log n) doubling strategy
static FORCE_INLINE void fill_buffer_with_pattern(gdv_binary dest,
                                                  gdv_int32 total_fill_bytes,
                                                  const char* fill_text,
                                                  gdv_int32 fill_text_len) {
  gdv_int32 initial_copy = std::min(fill_text_len, total_fill_bytes);
  memcpy(dest, fill_text, initial_copy);
  gdv_int32 written = initial_copy;
  while (written * 2 <= total_fill_bytes) {
    memcpy(dest + written, dest, written);
    written *= 2;
  }
  if (written < total_fill_bytes) {
    memcpy(dest + written, dest, total_fill_bytes - written);
  }
}

FORCE_INLINE
const char* lpad_utf8_int32_utf8(gdv_int64 context, const char* text, gdv_int32 text_len,