start working on text representation and constants

src/block.c

@@ -0,0 +1,24 @@
+#include "block.h"
+
+char* gravityBlockToCStr(GravityBlock block) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    // print block header
+    sbAppend(&buff, "%s (", block->name);
+    for (unsigned int i = 0; i < block->numParams; i++) {
+        if (i < block->numParams - 1) {
+            sbAppend(&buff, "%s, ", gravityTypeToCStr(block->paramTypes[i]));
+        } else {
+            sbAppend(&buff, "%s", gravityTypeToCStr(block->paramTypes[i]));
+        }
+    }
+    sbAppend(&buff, "):\n");
+
+    for (unsigned int i = 0; i < block->instructions.count; i++) {
+        GravityInstruction inst = *get(block->instructions, i);
+        sbAppend(&buff, "    %s\n", gravityInstructionToCStr(inst));
+    }
+
+    return buff.data;
+}