Querying Prolog

C_typePL_queryint Obtain status information on the Prolog system. The actual argument type depends on the information required. int describes what information is wanted. The options are given in query.

Table: PL_query options

PL_QUERY_ARGC	Return an integer holding the number of arguments given to Prolog from Unix.
PL_QUERY_ARGV	Return a char ** holding the argument vector given to Prolog from Unix.
PL_QUERY_SYMBOLFILE	Return a char * holding the current symbol file of the running process.
PL_MAX_INTEGER	Return a long, representing the maximal integer value represented by a Prolog integer.
PL_MIN_INTEGER	Return a long, representing the minimal integer value.
PL_QUERY_VERSION	Return a long, representing the version as $10,000 \times M + 100 \times m + p$, where $M$ is the major, $m$ the minor version number and $p$ the patch-level. For example, 20717 means 2.7.17.