simon/post-scarcity
1
0
Fork 0
Code Issues 14 Pull requests Projects Releases Packages Wiki Activity Actions

Added logical operators and, not and or. Closes #3

Browse source
This commit is contained in:
Simon Brooke 2026-02-24 01:45:51 +00:00
parent 8df304bc60
commit 62ebaf9819
13 changed files with 422 additions and 132 deletions
Download patch file Download diff file Expand all files Collapse all files

68
src/arith/peano.c
View file

@ -64,6 +64,35 @@ bool zerop( struct cons_pointer arg ) {
return result;
}
// TODO: think about
// bool greaterp( struct cons_pointer arg_1, struct cons_pointer arg_2) {
// bool result = false;
// struct cons_space_object * cell_1 = & pointer2cell( arg_1 );
// struct cons_space_object * cell_2 = & pointer2cell( arg_2 );
// if (cell_1->tag.value == cell_2->tag.value) {
// switch ( cell_1->tag.value ) {
// case INTEGERTV:{
// if ( nilp(cell_1->payload.integer.more) && nilp( cell_2->payload.integer.more)) {
// result = cell_1->payload.integer.value > cell_2->payload.integer.value;
// }
// // else deal with comparing bignums...
// }
// break;
// case RATIOTV:
// result = lisp_ratio_to_real( cell_1) > ratio_to_real( cell_2);
// break;
// case REALTV:
// result = ( cell.payload.real.value == 0 );
// break;
// }
// }
// return result;
// }
/**
* does this `arg` point to a negative number?
*/
@ -86,24 +115,35 @@ bool is_negative( struct cons_pointer arg ) {
return result;
}
/**
* @brief if `arg` is a number, return the absolute value of that number, else
* `NIL`
*
* @param arg a cons space object, probably a number.
* @return struct cons_pointer
*/
struct cons_pointer absolute( struct cons_pointer arg ) {
struct cons_pointer result = NIL;
struct cons_space_object cell = pointer2cell( arg );
if ( is_negative( arg ) ) {
switch ( cell.tag.value ) {
case INTEGERTV:
result =
make_integer( llabs( cell.payload.integer.value ),
cell.payload.integer.more );
break;
case RATIOTV:
result = make_ratio( absolute( cell.payload.ratio.dividend ),
cell.payload.ratio.divisor, false );
break;
case REALTV:
result = make_real( 0 - cell.payload.real.value );
break;
if ( numberp( arg)) {
if ( is_negative( arg ) ) {
switch ( cell.tag.value ) {
case INTEGERTV:
result =
make_integer( llabs( cell.payload.integer.value ),
cell.payload.integer.more );
break;
case RATIOTV:
result = make_ratio( absolute( cell.payload.ratio.dividend ),
cell.payload.ratio.divisor, false );
break;
case REALTV:
result = make_real( 0 - cell.payload.real.value );
break;
}
} else {
result = arg;
}
}