Added string.split() & string.find()

src/cbaselib.c

@@ -142,6 +142,85 @@ int cosmoB_sSub(CState *state, int nargs, CValue *args) {
     return 1;
 }
 
+// string.find
+int cosmoB_sFind(CState *state, int nargs, CValue *args) {
+    if (nargs == 2) {
+        if (!IS_STRING(args[0]) || !IS_STRING(args[1])) {
+            cosmoV_typeError(state, "string.find()", "<string>, <string>", "%s, %s", cosmoV_typeStr(args[0]), cosmoV_typeStr(args[1]));
+            return 0;
+        }
+
+        CObjString *str = cosmoV_readString(args[0]);
+        CObjString *ptrn = cosmoV_readString(args[1]);
+
+        char *indx = strstr(str->str, ptrn->str);
+
+        // failed, we have nothing to return
+        if (indx == NULL)
+            return 0;
+
+        // success! push the index
+        cosmoV_pushNumber(state, indx - str->str);
+    } else if (nargs == 3) {
+        if (!IS_STRING(args[0]) || !IS_STRING(args[1]) || !IS_NUMBER(args[2])) {
+            cosmoV_typeError(state, "string.find()", "<string>, <string>, <number>", "%s, %s, %s", cosmoV_typeStr(args[0]), cosmoV_typeStr(args[1]), cosmoV_typeStr(args[2]));
+            return 0;
+        }
+
+        CObjString *str = cosmoV_readString(args[0]);
+        CObjString *ptrn = cosmoV_readString(args[1]);
+        int startIndx = (int)cosmoV_readNumber(args[2]);
+
+        char *indx = strstr(str->str + startIndx, ptrn->str);
+
+        // failed, we have nothing to return
+        if (indx == NULL)
+            return 0;
+
+        // success! push the index
+        cosmoV_pushNumber(state, indx - str->str);
+    } else {
+        cosmoV_error(state, "Expected 2 or 3 arguments, got %d!", nargs);
+        return 0;
+    }
+
+    return 1;
+}
+
+// string.split
+int cosmoB_sSplit(CState *state, int nargs, CValue *args) {
+    if (nargs != 2) {
+        cosmoV_error(state, "Expected 2 arguments, got %d!", nargs);
+        return 0;
+    }
+
+    if (!IS_STRING(args[0]) || !IS_STRING(args[1])) {
+        cosmoV_typeError(state, "string.split()", "<string>, <string>", "%s, %s", cosmoV_typeStr(args[0]), cosmoV_typeStr(args[1]));
+        return 0;
+    }
+
+    CObjString *str = cosmoV_readString(args[0]);
+    CObjString *ptrn = cosmoV_readString(args[1]);
+
+    int nEntries = 0;
+    char *indx = str->str;
+    char *nIndx;
+
+    // while there are still patterns to match in the string, push the split strings onto the stack
+    do {
+        nIndx = strstr(indx, ptrn->str);
+
+        cosmoV_pushNumber(state, nEntries++);
+        cosmoV_pushLString(state, indx, nIndx == NULL ? strlen(indx) : nIndx - indx);
+
+        indx = nIndx + ptrn->length;
+    } while (nIndx != NULL);
+
+    // finally, make a table out of the pushed entries
+    cosmoV_makeTable(state, nEntries);
+    return 1;
+}
+
 void cosmoB_loadLibrary(CState *state) {
     const char *identifiers[] = {
         "print",
@@ -179,7 +258,15 @@ void cosmoB_loadLibrary(CState *state) {
     cosmoV_pushString(state, "sub");
     cosmoV_pushCFunction(state, cosmoB_sSub);
 
-    cosmoV_makeObject(state, 1);
+    // find
+    cosmoV_pushString(state, "find");
+    cosmoV_pushCFunction(state, cosmoB_sFind);
+
+    // split
+    cosmoV_pushString(state, "split");
+    cosmoV_pushCFunction(state, cosmoB_sSplit);
+    
+    cosmoV_makeObject(state, 3);
     // string.*
 
     // grab the object from the stack and set the base protoObject

src/cmem.h

@@ -5,7 +5,7 @@
 
 #include "cstate.h"
 
-#define GC_STRESS
+//#define GC_STRESS
 //#define GC_DEBUG
 // arrays will grow by a factor of 2
 #define GROW_FACTOR 2

src/cvm.c

@@ -320,9 +320,12 @@ bool callCValue(CState *state, CValue func, int args, int nresults, int offset)
         }
         case COBJ_OBJECT: { // object is being instantiated, making another object
             CObjObject *protoObj = (CObjObject*)cosmoV_readObj(func);
+            CValue ret;
+
+            cosmoV_pushValue(state, cosmoV_newObj(protoObj)); // push proto to stack for GC to find
             CObjObject *newObj = cosmoO_newObject(state);
             newObj->_obj.proto = protoObj;
-            CValue ret;
+            cosmoV_pop(state); // pop proto
 
             // check if they defined an initializer (we accept 0 return values)
             if (cosmoO_getIString(state, protoObj, ISTRING_INIT, &ret)) {
@@ -577,6 +580,7 @@ int cosmoV_execute(CState *state) {
             }
             case OP_SETLOCAL: {
                 uint8_t indx = READBYTE();
+                // set base to top of stack & pop
                 frame->base[indx] = *cosmoV_pop(state);
                 continue;
             }
@@ -978,8 +982,8 @@ int cosmoV_execute(CState *state) {
             case OP_COUNT: { // pop 1 value off the stack & if it's a table return the amount of active entries it has
                 StkPtr temp = cosmoV_getTop(state, 0);
 
-                if (!IS_OBJ(*temp) || cosmoV_readObj(*temp)->type != COBJ_TABLE) {
+                if (!IS_TABLE(*temp)) {
-                    cosmoV_error(state, "Expected object, got %s!", cosmoV_typeStr(*temp));
+                    cosmoV_error(state, "Expected table, got %s!", cosmoV_typeStr(*temp));
                     return -1;
                 }