Function IsHexStream

tools/io.cpp:101–114

bool IsSpace(char c) { return isspace(c) || c == ',' || c == '\0'; }

bool IsHexStream(const std::vector<char>& stream) {
  for (char c : stream) {
    if (IsSpace(c)) {
      continue;
    }

    // Every possible case of a SPIR-V hex stream starts with either '0' or 'x'
    // (see |HexMode| values).  Make a decision upon inspecting the first
    // non-space character.
    return c == '0' || c == 'x' || c == 'X';
  }

  return false;
}

bool MatchIgnoreCase(const char* token, const char* expect, size_t len) {
  for (size_t i = 0; i < len; ++i) {