We can codegen now

src/codegen/codegen.c

@@ -0,0 +1,53 @@
+#include "codegen.h"
+
+#include <groundvm.h>
+#include "../parser/SolsNode.h"
+#include "../include/estr.h"
+
+// FIXME add proper erroring function
+char* createCodegenError(char* what) {
+    Estr estr = CREATE_ESTR(what);
+    APPEND_ESTR(estr, "\nthats an error");
+    return estr.str;
+}
+
+static inline ResultType(GroundProgram, charptr) generateLiteralNode(SolsNode* node) {
+    // We don't even need to do anything lmao
+    return Success(GroundProgram, charptr, groundCreateProgram());
+}
+
+static inline ResultType(GroundProgram, charptr) generatePutsNode(SolsNode* node) {
+    if (node->children.count < 1) {
+        return Error(GroundProgram, charptr, "puts requires arguments");
+    }
+    GroundInstruction inst = groundCreateInstruction(PRINTLN);
+    for (size_t i = 0; i < node->children.count; i++) {
+        groundAddReferenceToInstruction(&inst, node->children.at[i].accessArg);
+    }
+    GroundProgram program = groundCreateProgram();
+    groundAddInstructionToProgram(&program, inst);
+    return Success(GroundProgram, charptr, program);
+}
+
+ResultType(GroundProgram, charptr) generateCode(SolsNode* node) {
+
+    GroundProgram program = groundCreateProgram();
+
+    // Generate code for all children before generating this node's code
+    for (size_t i = 0; i < node->children.count; i++) {
+        ResultType(GroundProgram, charptr) generated = generateCode(&node->children.at[i]);
+        if (generated.error) {
+            return Error(GroundProgram, charptr, createCodegenError(generated.as.error));
+        }
+        for (size_t j = 0; j < generated.as.success.size; j++) {
+            groundAddInstructionToProgram(&program, generated.as.success.instructions[j]);
+        }
+    }
+
+    // Now generate code for this node
+    switch (node->type) {
+        case SNT_PUTS: generate(Puts);
+        case SNT_LITERAL: generate(Literal);
+    }
+    return Success(GroundProgram, charptr, program);
+}

src/codegen/codegen.h

@@ -0,0 +1,28 @@
+#ifndef CODEGEN_H
+#define CODEGEN_H
+
+#include <groundvm.h>
+#include "../parser/SolsNode.h"
+
+Result(GroundProgram, charptr);
+
+// Generates a GroundProgram (from the Ground VM header) from
+// a provided SolsNode. 
+// Returns:
+//    Success: Generated GroundProgram
+//    Failure: charptr detailing what happened
+ResultType(GroundProgram, charptr) generateCode(SolsNode* node);
+
+// Macro to help with code generation (and soon error handling)
+#define generate(nodetype) {\
+    ResultType(GroundProgram, charptr) __result = generate##nodetype##Node(node);\
+    if (__result.error) {\
+        return Error(GroundProgram, charptr, __result.as.error);\
+    }\
+    for (size_t i = 0; i < __result.as.success.size; i++) {\
+        groundAddInstructionToProgram(&program, __result.as.success.instructions[i]);\
+    }\
+    break;\
+}
+
+#endif