non-recursive GetNode

diff --git a/main2.c b/main2.c
index 86cc7b70e1ccf94df0682d1f1afd5f88e51ebc03..657fd0eff417f9d40f66b174fc9fd8060600aea7 100644 (file)
--- a/main2.c
+++ b/main2.c
@@ -14,6 +14,22 @@
 #define NEWARR(TYPE, NUM) ((TYPE *)calloc(NUM, sizeof(TYPE)))
 
 
+// Util
+
+bool
+charInString(char c, const char * str) {
+    for (int i = 0; i < strlen(str); i++)
+        if (c == str[i])
+            return true;
+    return false;
+}
+
+bool
+isNewline(char c) {
+    return c == '\n' || c == '\r';
+}
+
+
 // getch
 
 #ifdef _WIN32
@@ -121,80 +137,37 @@ typedef struct JSONNode {
     JSONNodeKind kind;
     size_t data;
     struct JSONNode * parent;
-    struct JSONNode * children;
+    struct JSONNode * firstChild;
+    int childCount;
+    struct JSONNode * prev;
     struct JSONNode * next;
 } JSONNode;
 
 JSONNode *
-JSONNodeNew(JSONNodeKind kind, size_t data) {
+JSONNodeNew(JSONNodeKind kind) {
     JSONNode * result = NEW(JSONNode);
     result->kind = kind;
-    result->data = data;
     return result;
 }
 
-JSONNode *
-JSONNodeNewNul() {
-    return JSONNodeNew(JSONNodeKind_Nul, (size_t)NULL);
-}
-
-JSONNode *
-JSONNodeNewInt(int i) {
-    return JSONNodeNew(JSONNodeKind_Int, (size_t)i);
-}
-
-JSONNode *
-JSONNodeNewStr(const char * str) {
-    return JSONNodeNew(JSONNodeKind_Str, (size_t)str);
-}
-
-JSONNode *
-JSONNodeNewObj() {
-    return JSONNodeNew(JSONNodeKind_Obj, (size_t)NULL);
-}
-
-JSONNode *
-JSONNodeNewArr() {
-    return JSONNodeNew(JSONNodeKind_Arr, (size_t)NULL);
-}
-
 JSONNode *
 JSONNodePush(JSONNode * this, JSONNode * that) {
-    if (this->children == NULL) {
-        this->children = that;
+    if (this->firstChild == NULL) {
+        this->firstChild = that;
     }
     else {
-        JSONNode * lastNode = this->children;
+        JSONNode * lastNode = this->firstChild;
         while (lastNode->next != NULL)
             lastNode = lastNode->next;
         lastNode->next = that;
+        that->prev = lastNode;
     }
+    this->childCount++;
     that->parent = this;
-    that->next = NULL;
     
     return that;
 }
 
-void
-JSONNodePop(JSONNode * this) {
-    if (this != NULL) {
-        JSONNode * ptr = this->children;
-
-        if (ptr == NULL) { // no children
-            JSONNodePop(this->parent);
-        }
-        else if (ptr->next == NULL) { // one child
-            this->children = NULL;
-            
-        }
-        else { // more than one child
-            while (ptr->next->next != NULL)
-                ptr = ptr->next;
-            ptr->next = NULL;
-        }
-    }
-}
-
 void
 Indent(int indent) {
     for (int i = 0; i < indent; i++)
@@ -210,6 +183,10 @@ JSONNodePrint(JSONNode * node, JSONNode * currNode) {
     if (node->parent == NULL)
         indent = 0;
 
+    if (currNode == node) {
+        vt100SaveCursor();
+    }
+
     switch (node->kind) {
     case JSONNodeKind_Nul: {
         printf("null");
@@ -227,20 +204,21 @@ JSONNodePrint(JSONNode * node, JSONNode * currNode) {
     }
     case JSONNodeKind_Obj: {
         printf("{\n");
-        JSONNode * ptr = node->children;
+        JSONNode * ptr = node->firstChild;
         indent++;
         while (ptr != NULL) {
-            JSONNode * key = ptr;
-            JSONNode * value = ptr->next;
             Indent(indent);
-            JSONNodePrint(key, currNode);
-            printf(": ");
-            JSONNodePrint(value, currNode);
-            if (ptr->next != NULL)
-                ptr = ptr->next->next;
-            else
-                ptr = NULL;
-            printf("%s\n", (ptr == NULL ? "" : ","));
+            JSONNodePrint(ptr, currNode);
+            ptr = ptr->next;
+
+            if (ptr != NULL) {
+                printf(": ");
+                JSONNodePrint(ptr, currNode);
+                if (ptr->next != NULL)
+                    printf(",");
+                ptr = ptr->next;
+            }
+            printf("\n");
         }
         indent--;
         Indent(indent);
@@ -248,22 +226,23 @@ JSONNodePrint(JSONNode * node, JSONNode * currNode) {
         break;
     }
     case JSONNodeKind_Arr: {
-        printf("[ ");
-        JSONNode * ptr = node->children;
+        printf("[\n");
+        JSONNode * ptr = node->firstChild;
+        indent++;
         while (ptr != NULL) {
-            JSONNode * value = ptr;
-            JSONNodePrint(value, currNode);
+            Indent(indent);
+            JSONNodePrint(ptr, currNode);
+            if (ptr->next != NULL)
+                printf(",");
+            printf("\n");
             ptr = ptr->next;
-            printf("%s", (ptr == NULL ? "" : ", "));
         }
-        printf(" ]");
+        indent--;
+        Indent(indent);
+        printf("]");
         break;
     }
     }
-
-    if (currNode == node) {
-        vt100SaveCursor();
-    }
 }
 
 
@@ -310,7 +289,8 @@ GetStr(JSONNode * node, CharPredicateFunc charPredicate) {
     char * str = (char *)node->data;
     
     int c;
-    while ((c = GetChar()), (c != '\r') && (c != '\n')) {
+    while ((c = PeekChar()), ! isNewline(c)) {
+        getch();
         if ((c == 8 || c == 127) && strLen > 0) {
             strLen--;
             str[strLen] = '\0';
@@ -323,74 +303,80 @@ GetStr(JSONNode * node, CharPredicateFunc charPredicate) {
     }
 }
 
-void
-GetNode(JSONNode * parent, JSONNode * node) {
-    int c = GetChar();
-
-    g_CurrNode = node;
+JSONNode *
+GetNode() {
+    JSONNode * result = NULL;
 
-    if (parent == NULL)
-        g_DrawNode = node;
+    JSONNode * node = NULL;
 
-    if (parent != NULL && node != NULL)
-        JSONNodePush(parent, node);
+    while (true) {
+        if (isNewline(PeekChar())) {
+            getch();
 
-    switch (c) {
-    case 'i': {
-        node->kind = JSONNodeKind_Int;
-        GetStr(node, predInt);
-        break;
-    }
-    case 's': {
-        node->kind = JSONNodeKind_Str;
-        GetStr(node, predStr);
-        break;
-    }
-    case 'o': {
-        node->kind = JSONNodeKind_Obj;
-        while ((c = PeekChar()), (c != '\r') && (c != '\n')) {
-            JSONNode * newNode;
+            if (node == NULL || node->parent == NULL)
+                break;
             
-            newNode = JSONNodeNewStr("");
-            g_CurrNode = newNode;
+            node = node->parent;
+            g_CurrNode = node;
+
+            continue;
+        }
+        
+        // object key
+        if (node != NULL && node->kind == JSONNodeKind_Obj && node->childCount % 2 == 0) {
+            JSONNode * newNode = JSONNodeNew(JSONNodeKind_Str);
             JSONNodePush(node, newNode);
+
+            node = newNode;
+            g_CurrNode = node;
+            
             GetStr(newNode, predStr);
+            
+            continue;
+        }
+        
+        int c = GetChar();
 
-            newNode = JSONNodeNewNul();
+        if (! charInString(c, "isoa"))
+            continue;
+
+        JSONNode * newNode = JSONNodeNew(JSONNodeKind_Nul);
+
+        if (result == NULL)
+            g_DrawNode = result = newNode;
+
+        if (node != NULL)
             JSONNodePush(node, newNode);
-            GetNode(node, newNode);
+        
+        node = newNode;
+        g_CurrNode = node;
+        
+        switch (c) {
+        case 'i': {
+            node->kind = JSONNodeKind_Int;
+            GetStr(node, predInt);
+            break;
         }
-           g_CurrNode = node;
-        getch();
-        break;
-    }
-    case 'a': {
-        node->kind = JSONNodeKind_Arr;
-        while ((c = PeekChar()), (c != '\r') && (c != '\n')) {
-            JSONNode * newNode;
-            
-            newNode = JSONNodeNewNul();
-            //g_CurrNode = newNode;
-            JSONNodePush(node, newNode);
-            GetNode(node, newNode);
+        case 's': {
+            node->kind = JSONNodeKind_Str;
+            GetStr(node, predStr);
+            break;
+        }
+        case 'o': {
+            node->kind = JSONNodeKind_Obj;
+            break;
+        }
+        case 'a': {
+            node->kind = JSONNodeKind_Arr;
+            break;
+        }
+        case 8:
+        case 127:
+            break;
         }
-           g_CurrNode = node;
-        getch();
-        break;
-    }
-    /*
-    case 8:
-    case 127:
-        JSONNodePop(parent);
-       JSONNode * newNode = JSONNodeNewNul();
-        GetNode(parent, newNode);
-        break;
-    */
-    case 't':
-        node->kind = JSONNodeKind_Int;
-        node->data = (size_t)GetChar();
-        break;
     }
+
+    return result;
 }
 
 
@@ -399,20 +385,13 @@ GetNode(JSONNode * parent, JSONNode * node) {
 int main() {
     vt100EnableAlternateBuffer();
 
-    Draw();
-
-    JSONNode * n = JSONNodeNewNul();
-    GetNode(NULL, n);
-    //JSONNode * n = TestNode();
+    JSONNode * n = GetNode();
+    
+    vt100DisableAlternateBuffer();
 
-    vt100ClearScreen();
-    vt100CursorHome();
     JSONNodePrint(n, NULL);
-    printf("\n");
 
     // JSONFree(n);
-    
-    vt100DisableAlternateBuffer();
 
     return 0;
 }