Function getformat

third-party/lua-5.4.6/src/lstrlib.c:1245–1257

** Get a conversion specification and copy it to 'form'. ** Return the address of its last character. */

** Return the address of its last character.
*/
static const char *getformat (lua_State *L, const char *strfrmt,
                                            char *form) {
  /* spans flags, width, and precision ('0' is included as a flag) */
  size_t len = strspn(strfrmt, L_FMTFLAGSF "123456789.");
  len++;  /* adds following character (should be the specifier) */
  /* still needs space for '%', '\0', plus a length modifier */
  if (len >= MAX_FORMAT - 10)
    luaL_error(L, "invalid format (too long)");
  *(form++) = '%';
  memcpy(form, strfrmt, len * sizeof(char));
  *(form + len) = '\0';
  return strfrmt + len - 1;
}


/*