add split

1 files changed, 25 insertions, 0 deletions

diff --git a/liblali.c b/liblali.c
index ac552c2..9afec71 100644
--- a/liblali.c
+++ b/liblali.c
@@ -1075,6 +1075,30 @@ Object *primitiveJoin(Object **args, GC_PARAM) {
     return newSymbol(symbolResult, GC_ROOTS);
 }
 
+Object *primitiveSplit(Object **args, GC_PARAM) {
+  Object *symbol = (*args)->car;
+
+  if (symbol == nil || (symbol->type != TYPE_SYMBOL &&
+                        symbol->type != TYPE_STRING &&
+                        symbol->type != TYPE_NUMBER))
+    exceptionWithObject(symbol, "is not a symbol, not a number, not a string");
+
+  GC_TRACE(gcRes, nil);
+  GC_TRACE(gcElement, nil);
+  char string[2] = {'\0'};
+  size_t size = strlen(symbol->string);
+  for (unsigned long i = 0; i < size; i++) {
+    string[0] = symbol->string[i];
+    if (symbol->type == TYPE_STRING)
+      *gcElement = newString(string, GC_ROOTS);
+    else
+      *gcElement = newSymbol(string, GC_ROOTS);
+
+    *gcRes = newCons(gcElement, gcRes, GC_ROOTS);
+  }
+  return reverseList(*gcRes);
+}
+
 typedef struct Primitive {
   char *name;
   int nMinArgs, nMaxArgs;
@@ -1118,6 +1142,7 @@ Primitive primitives[] = {
   { ">",       1, -1, primitiveGreater      },
   /* { ">=",      1, -1, primitiveGreaterEqual } */
   { "join",    1,  1, primitiveJoin         },
+  { "split",   1,  1, primitiveSplit        },
 };
 
 // Special forms handled by evalExpr. Must be in the same order as above.