/* miscop.c: Miscellaneous operations. */ #define _POSIX_SOURCE #include <stdlib.h> #include <time.h> #include "x.tab.h" #include "operator.h" #include "execute.h" #include "data.h" #include "util.h" #include "config.h" #include "ident.h" #include "lookup.h" static void find_extreme(int which); void op_version(void) { List *version; Data *d; /* Take no arguments. */ if (!func_init_0()) return; /* Construct a list of the version numbers and push it. */ version = list_new(3); d = list_empty_spaces(version, 3); d[0].type = d[1].type = d[2].type = INTEGER; d[0].u.val = VERSION_MAJOR; d[1].u.val = VERSION_MINOR; d[2].u.val = VERSION_BUGFIX; push_list(version); list_discard(version); } void op_random(void) { Data *args; /* Take one integer argument. */ if (!func_init_1(&args, INTEGER)) return; /* Replace argument on stack with a random number. */ args[0].u.val = random_number(args[0].u.val) + 1; } void op_time(void) { /* Take no arguments. */ if (!func_init_0()) return; push_int(time(NULL)); } void op_ctime(void) { Data *args; int num_args; time_t tval; char *timestr; String *str; /* Take an optional integer argument. */ if (!func_init_0_or_1(&args, &num_args, INTEGER)) return; tval = (num_args) ? args[0].u.val : time(NULL); timestr = ctime(&tval); str = string_from_chars(timestr, 24); pop(num_args); push_string(str); string_discard(str); } /* which is 1 for max, -1 for min. */ static void find_extreme(int which) { int arg_start, num_args, i, type; Data *args, *extreme, d; arg_start = arg_starts[--arg_pos]; args = &stack[arg_start]; num_args = stack_pos - arg_start; if (!num_args) { cthrow(numargs_id, "Called with no arguments, requires at least one."); return; } type = args[0].type; if (type != INTEGER && type != STRING) { cthrow(type_id, "First argument (%D) not an integer or string.", &args[0]); return; } extreme = &args[0]; for (i = 1; i < num_args; i++) { if (args[i].type != type) { cthrow(type_id, "Arguments are not all of same type."); return; } if (data_cmp(&args[i], extreme) * which > 0) extreme = &args[i]; } /* Replace args[0] with extreme, and pop other arguments. */ data_dup(&d, extreme); data_discard(&args[0]); args[0] = d; pop(num_args - 1); } void op_max(void) { find_extreme(1); } void op_min(void) { find_extreme(-1); } void op_abs(void) { Data *args; if (!func_init_1(&args, INTEGER)) return; if (args[0].u.val < 0) args[0].u.val = -args[0].u.val; } void op_get_name(void) { Data *args; long dbref; if (!func_init_1(&args, SYMBOL)) return; if (!lookup_retrieve_name(args[0].u.symbol, &dbref)) { cthrow(namenf_id, "Can't find object name %I.", args[0].u.symbol); return; } pop(1); push_dbref(dbref); } void op_ticks_left(void) { if (!func_init_0()) return; push_int(cur_frame->ticks); }