added evalf and reorganized main

src/noja.c

@@ -0,0 +1,260 @@
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "debug.h"
+#include "o_builtins.h"
+#include "compiler/parse.h"
+#include "compiler/serialize.h"
+#include "compiler/compile.h"
+#include "runtime/runtime.h"
+#include "runtime/runtime_error.h"
+
+static const char usage[] = 
+	"Usage:\n"
+	"    $ noja [ <file> | -f <file> | -c <code> | -h ]\n"
+	"\n"
+	"For example:\n"
+	"    $ noja file.noja\n"
+	"    $ noja -f file.noja\n"
+	"    $ noja -c \"print('some noja code')\"\n"
+	"\n"
+	"NOTE: When a line starts with $ it means that it's a terminal command.\n";
+
+static _Bool interpret_file(const char *file);
+static _Bool interpret_code(const char *code);
+
+_Bool noja(int argc, char **argv)
+{
+	assert(argc > 0);
+
+	if(argc == 1)
+		{
+			// $ noja
+			fprintf(stderr, "Error: Incorrect usage.\n\n");
+			fprintf(stderr, usage);
+			return 0;
+		}
+
+	assert(argc > 1);
+
+	if(!strcmp(argv[1], "-f"))
+		{
+			if(argc < 3)
+				{
+					fprintf(stderr, "Error: Missing file after -f option.\n");
+					return 0;
+				}
+
+
+			if(argc > 3)
+				fprintf(stderr, "Warning: Ignoring %d options\n", argc - 3);
+
+			const char *file = argv[2];
+			return interpret_file(file);
+		}
+
+	if(!strcmp(argv[1], "-c"))
+		{
+			if(argc < 3)
+				{
+					fprintf(stderr, "Error: Missing code after -c option.\n");
+					return 0;
+				}
+
+			if(argc > 3)
+				fprintf(stderr, "Warning: Ignoring %d options\n", argc - 3);
+
+			const char *code = argv[2];
+			return interpret_code(code);
+		}
+
+	if(!strcmp(argv[1], "-h"))
+		{
+			if(argc > 2)
+				fprintf(stderr, "Warning: Ignoring %d options\n", argc - 2);
+
+			fprintf(stdout, usage);
+			return 1;
+		}
+
+	if(argc > 2)
+		fprintf(stderr, "Warning: Ignoring %d options\n", argc - 2);
+
+	const char *file = argv[1];
+	return interpret_file(file);
+}
+
+static void print_error(const char *type, Error *error)
+{
+	if(type == NULL)
+		fprintf(stderr, "Error");
+	else if(error->internal)
+		fprintf(stderr, "Internal Error");
+	else
+		fprintf(stderr, "%s Error", type);
+
+	fprintf(stderr, ": %s. ", error->message);
+
+	if(error->file != NULL)
+		{
+			if(error->line > 0 && error->func != NULL)
+				fprintf(stderr, "(Reported in %s:%d in %s)", error->file, error->line, error->func);
+			else if(error->line > 0 && error->func == NULL)
+				fprintf(stderr, "(Reported in %s:%d)", error->file, error->line);
+			else if(error->line < 1 && error->func != NULL)
+				fprintf(stderr, "(Reported in %s in %s)", error->file, error->func);
+		}
+
+	fprintf(stderr, "\n");
+}
+
+static _Bool interpret(Source *src)
+{
+	// Compile the code. This section transforms
+	// a [Source] into an [Executable].
+	Executable *exe;
+	{
+		// Create a bump-pointer allocator to hold the AST.
+		BPAlloc *alloc = BPAlloc_Init(-1);
+
+		if(alloc == NULL)
+			{
+				fprintf(stderr, "Internal Error: Couldn't allocate bump-pointer allocator to hold the AST.\n");
+				return 0;
+			}
+
+		Error error;
+		Error_Init(&error);
+
+		// NOTE: The AST is stored in the BPAlloc. It's
+		//       lifetime is the same as the pool.
+		AST *ast = parse(src, alloc, &error);
+	
+		if(ast == NULL)
+			{
+				assert(error.occurred);
+				print_error("Parsing", &error);
+				Error_Free(&error);
+				BPAlloc_Free(alloc);
+				return 0;
+			}
+
+		exe = compile(ast, alloc, &error);
+
+		// We're done with the AST, independently from
+		// the compilation result.
+		BPAlloc_Free(alloc);
+
+		if(exe == NULL)
+			{
+				assert(error.occurred);
+				print_error("Compilation", &error);
+				Error_Free(&error);
+				return 0;
+			}
+	}
+
+	// Now execute it.
+	{
+		Runtime *runt = Runtime_New(-1, -1, NULL, NULL);
+
+		if(runt == NULL)
+			{
+				Error error;
+				Error_Init(&error);
+				Error_Report(&error, 1, "Couldn't initialize runtime");
+				print_error(NULL, &error);
+				Error_Free(&error);
+				Executable_Free(exe);
+				return 0;
+			}
+
+		// We use a [RuntimeError] instead of a simple [Error]
+		// because the [RuntimeError] makes a snapshot of the
+		// runtime state when an error is reported. Other than
+		// this fact they are interchangable. Any function that
+		// expects a pointer to [Error] can receive a [RuntimeError]
+		// upcasted to [Error].
+		RuntimeError error;
+		RuntimeError_Init(&error, runt); // Here we specify the runtime to snapshot in case of failure.
+		
+		Object *bins = Object_NewBuiltinsMap(runt, Runtime_GetHeap(runt), (Error*) &error);
+
+		if(bins == NULL)
+			{
+				assert(error.base.occurred == 1);
+				print_error(NULL, (Error*) &error);
+				RuntimeError_Free(&error);
+				Executable_Free(exe);
+				Runtime_Free(runt);
+				return 0;
+			}
+
+		Runtime_SetBuiltins(runt, bins);
+
+		Object *o = run(runt, (Error*) &error, exe, 0, NULL, NULL, 0);
+
+		// NOTE: The pointer to the builtins object is invalidated
+		//       now because it may be moved by the garbage collector.
+
+		if(o == NULL)
+			{
+				print_error("Runtime", (Error*) &error);
+
+				if(error.snapshot == NULL)
+					fprintf(stderr, "No snapshot available.\n");
+				else
+					Snapshot_Print(error.snapshot, stderr);
+
+				RuntimeError_Free(&error);
+			}
+
+		Runtime_Free(runt);
+		Executable_Free(exe);
+
+		return o != NULL;
+	}
+}
+
+static _Bool interpret_file(const char *file)
+{
+	Error error;
+	Error_Init(&error);
+	
+	Source *src = Source_FromFile(file, &error);
+
+	if(src == NULL)
+		{
+			assert(error.occurred == 1);
+			print_error(NULL, &error);
+			Error_Free(&error);
+			return 0;
+		}
+
+	_Bool r = interpret(src);
+
+	Source_Free(src);
+	return r;
+}
+
+static _Bool interpret_code(const char *code)
+{
+	Error error;
+	Error_Init(&error);
+	
+	Source *src = Source_FromString(NULL, code, -1, &error);
+
+	if(src == NULL)
+		{
+			assert(error.occurred);
+			print_error(NULL, &error);
+			Error_Free(&error);
+			return 0;
+		}
+
+	_Bool r = interpret(src);
+
+	Source_Free(src);
+	return r;
+}