Function readline

ml/src/svm.cpp:3120–3136

static int max_line_len;

static char*
readline(FILE* input)
{
  if (fgets(line, max_line_len, input) == nullptr)
    return nullptr;

  while (strrchr(line, '\n') == nullptr) {
    max_line_len *= 2;
    line = static_cast<char*>(realloc(line, max_line_len));
    int len = static_cast<int>(strlen(line));

    if (fgets(line + len, max_line_len - len, input) == nullptr)
      break;
  }

  return line;
}

svm_model*
svm_load_model(const char* model_file_name)