Embedded commands now work without any bugs I can detect. Next up are

loops, branching, and getting the tokenizer to give special treatment
to certain builtin functions.  But first I should get some sleep :)

include/QF/gib_buffer.h

@@ -40,9 +40,13 @@ typedef struct gib_buffer_data_s {
 	
 	// Data for handling return values
 	struct {
-		qboolean waiting, available;
+		qboolean waiting, available; // Return value states
+		
+		// Data saved by tokenizer/processor
 		unsigned int line_pos; // Position within line
 		unsigned int token_pos; // Position within token
+		qboolean cat; // Concatenate to previous token?
+		char delim; // delimiter of token
 		struct dstring_s *retval; // Returned value
 	} ret;
 	

include/QF/gib_parse.h

@@ -28,6 +28,8 @@
 
 */
 
+char GIB_Parse_Match_Angle (const char *str, unsigned int *i);
+
 void GIB_Parse_Extract_Line (struct cbuf_s *cbuf);
 void GIB_Parse_Tokenize_Line (struct cbuf_s *cbuf);
 

libs/util/cbuf.c

@@ -146,7 +146,7 @@ Cbuf_Execute (cbuf_t *cbuf)
 {
 	cbuf_active = cbuf;
 	cbuf->state = CBUF_STATE_NORMAL;
-	while (cbuf->buf->str[0]) {
+	while (cbuf->buf->str[0] || cbuf->line->str[0]) {
 		cbuf->interpreter->extract_line (cbuf);
 		if (cbuf->state)
 			break;
@@ -185,6 +185,7 @@ Cbuf_Execute_Stack (cbuf_t *cbuf)
 		sp = sp->up;
 	}
 	dstring_clearstr (cbuf->buf);
+	dstring_clearstr (cbuf->line);
 	if (cbuf->down) {
 		Cbuf_DeleteStack (cbuf->down);
 		cbuf->down = 0;
@@ -197,7 +198,7 @@ Cbuf_Execute_Sets (cbuf_t *cbuf)
 	cbuf_args_t *args = cbuf->args;
 
 	cbuf_active = cbuf;
-	while (cbuf->buf->str[0]) {
+	while (cbuf->buf->str[0] || cbuf->line->str[0]) {
 		cbuf->interpreter->extract_line (cbuf);
 		cbuf->interpreter->parse_line (cbuf);
 		if (!args->argc)

libs/util/gib_buffer.c

@@ -92,13 +92,15 @@ void GIB_Buffer_Construct (struct cbuf_s *cbuf)
 	cbuf->data = calloc (1, sizeof (gib_buffer_data_t));
 	GIB_DATA (cbuf)->arg_composite = dstring_newstr ();
 	GIB_DATA (cbuf)->current_token = dstring_newstr ();
+	GIB_DATA (cbuf)->ret.retval = dstring_newstr ();
 }
 
 void GIB_Buffer_Destruct (struct cbuf_s *cbuf)
 {
 	dstring_delete (GIB_DATA (cbuf)->arg_composite);
 	dstring_delete (GIB_DATA (cbuf)->current_token);
-	if (GIB_DATA(cbuf)->locals)
+	dstring_delete (GIB_DATA (cbuf)->ret.retval);
+	if (GIB_DATA(cbuf)->locals && GIB_DATA(cbuf)->type == GIB_BUFFER_NORMAL)
 		Hash_DelTable (GIB_DATA(cbuf)->locals);
 	free (cbuf->data);
 }

libs/util/gib_builtin.c

@@ -116,9 +116,31 @@ GIB_Lset_f (void)
 		GIB_Local_Set (cbuf_active, GIB_Argv(1), GIB_Argv(2));
 }
 
+void
+GIB_Return_f (void)
+{
+	if (GIB_Argc () > 2)
+		Cbuf_Error ("numargs",
+					"return: invalid number of arguments\n"
+					"usage: return <value>");
+	else {
+		dstring_clearstr (cbuf_active->buf);
+		if (GIB_Argc () == 1)
+			return;
+		if (!cbuf_active->up || !cbuf_active->up->up)
+		 	Cbuf_Error ("return","return attempted at top of stack");
+		if (GIB_DATA(cbuf_active->up->up)->ret.waiting) {
+			dstring_clearstr (GIB_DATA(cbuf_active->up->up)->ret.retval);
+			dstring_appendstr (GIB_DATA(cbuf_active->up->up)->ret.retval, GIB_Argv(1));
+			GIB_DATA(cbuf_active->up->up)->ret.available = true;
+		}
+	}
+}
+
 void
 GIB_Builtin_Init (void)
 {
 	GIB_Builtin_Add ("function", GIB_Function_f);
 	GIB_Builtin_Add ("lset", GIB_Lset_f);
+	GIB_Builtin_Add ("return", GIB_Return_f);
 }

libs/util/gib_parse.c

@@ -63,7 +63,7 @@ GIB_Parse_Match_Dquote (const char *str, unsigned int *i)
 	for ((*i)++; str[*i]; (*i)++) {
 		if (str[*i] == '\n')
 			return '\"'; // Newlines should never occur inside quotes, EVER
-		if (str[*i] == '\"')
+		else if (str[*i] == '\"')
 			return 0;
 	}
 	return '\"';
@@ -77,12 +77,10 @@ GIB_Parse_Match_Brace (const char *str, unsigned int *i)
 		if (str[*i] == '\"') {
 			if ((c = GIB_Parse_Match_Dquote (str, i)))
 				return c;
-		}
-		if (str[*i] == '{') {
+		} else if (str[*i] == '{') {
 			if ((c = GIB_Parse_Match_Brace (str, i)))
 				return c;
-		}
-		if (str[*i] == '}')
+		} else if (str[*i] == '}')
 				return 0;
 	}
 	return '{';
@@ -96,8 +94,7 @@ GIB_Parse_Match_Paren (const char *str, unsigned int *i)
 		if (str[*i] == '(') {
 			if ((c = GIB_Parse_Match_Paren (str, i)))
 				return c;
-		}
-		if (str[*i] == ')')
+		} else if (str[*i] == ')')
 			return 0;
 	}
 	return '(';
@@ -264,9 +261,9 @@ GIB_Parse_Tokenize_Line (struct cbuf_s *cbuf)
 	dstring_t *arg = GIB_DATA(cbuf)->current_token;
 	const char *str = cbuf->line->str;
 	cbuf_args_t *args = cbuf->args;
-	static qboolean cat = false;
+	qboolean cat = false;
 	char delim;
-	int i = 0;
+	int i;
 	
 	// This function can be interrupted to call a GIB
 	// subroutine.  First we need to clean up anything
@@ -275,19 +272,15 @@ GIB_Parse_Tokenize_Line (struct cbuf_s *cbuf)
 	// Do we have a left-over token that needs processing?
 	
 	if (GIB_DATA(cbuf)->ret.waiting) {
-		// FIXME: Call processing function here
-		if (GIB_DATA(cbuf)->ret.waiting) // Still not done?
-			return;
-		i = GIB_DATA(cbuf)->ret.line_pos; // Start where we left off
+		if (GIB_Process_Token (arg, GIB_DATA(cbuf)->ret.delim))
+			return; // Still not done, or error
+		GIB_Parse_Add_Token (cbuf->args, GIB_DATA(cbuf)->ret.cat, arg);
+		i = GIB_DATA(cbuf)->ret.line_pos; // Start tokenizing where we left off
 	} else {
 		args->argc = 0; // Start from scratch
 		i = 0;
-		cat = false;
 	}
-	
-	// Get just the first token so we can look up any
-	// parsing options that a builtin requests
-	
+
 	while (str[i]) {
 		while (isspace(str[i])) // Eliminate whitespace
 			i++;
@@ -298,15 +291,14 @@ GIB_Parse_Tokenize_Line (struct cbuf_s *cbuf)
 			i++;
 			continue;
 		}
+		dstring_clearstr (arg);
 		delim = GIB_Parse_Get_Token (str, &i, arg);
 		if (!delim)
 			break;
 		Sys_DPrintf("Got token: %s\n", arg->str);
 		
-		// FIXME:  Command sub goes here with subroutine handling
-		
 		if (GIB_Process_Token (arg, delim))
-			goto FILTER_ERROR;
+			goto FILTER_ERROR; // Error or GIB subroutine needs to be called
 		
 		GIB_Parse_Add_Token (cbuf->args, cat, arg);
 		if (cat)
@@ -314,13 +306,14 @@ GIB_Parse_Tokenize_Line (struct cbuf_s *cbuf)
 		
 		if (delim != ' ') // Move into whitespace if we haven't already
 			i++;
-		dstring_clearstr (arg);
 	}
 	GIB_Parse_Generate_Composite (cbuf);
+	dstring_clearstr (cbuf->line);
 	return;
-FILTER_ERROR: // Error during filtering, clean up mess
-	dstring_clearstr (arg);
-	args->argc = 0;
+FILTER_ERROR:
+	GIB_DATA(cbuf)->ret.line_pos = i; // save our information in case
+	GIB_DATA(cbuf)->ret.cat = cat;    // error is not fatal
+	GIB_DATA(cbuf)->ret.delim = delim;
 	return;
 }
 

libs/util/gib_process.c

@@ -35,6 +35,7 @@
 #include "QF/cbuf.h"
 #include "QF/cvar.h"
 #include "QF/gib_buffer.h"
+#include "QF/gib_parse.h"
 
 #include "exp.h"
 
@@ -95,12 +96,63 @@ GIB_Process_Math (struct dstring_s *token)
 	return 0;
 }
 
+int
+GIB_Process_Embedded (struct dstring_s *token)
+{
+	cbuf_t *sub;
+	int i, n;
+	char c;
+	
+	if (GIB_DATA(cbuf_active)->ret.waiting)  {
+		if (!GIB_DATA(cbuf_active)->ret.available) {
+			GIB_DATA(cbuf_active)->ret.waiting = false;
+			Cbuf_Error ("return", "Embedded command did not return a value.");
+			return -1;
+		}
+		i = GIB_DATA(cbuf_active)->ret.token_pos; // Jump to the right place
+	} else
+		i = 0;
+	
+	for (; token->str[i]; i++) {
+		if (token->str[i] == '<') {
+			n = i;
+			if ((c = GIB_Parse_Match_Angle (token->str, &i))) {
+				Cbuf_Error ("parse", "Could not find matching %c", c);
+				return -1;
+			}
+			if (GIB_DATA(cbuf_active)->ret.available) {
+				dstring_replace (token, n, i-n+1, GIB_DATA(cbuf_active)->ret.retval->str,
+				   strlen(GIB_DATA(cbuf_active)->ret.retval->str));
+				i = n + strlen(GIB_DATA(cbuf_active)->ret.retval->str) - 1;
+				GIB_DATA(cbuf_active)->ret.waiting = false;
+				GIB_DATA(cbuf_active)->ret.available = false;
+			} else {
+				sub = Cbuf_New (&gib_interp);
+				GIB_DATA(sub)->type = GIB_BUFFER_PROXY;
+				GIB_DATA(sub)->locals = GIB_DATA(cbuf_active)->locals;
+				dstring_insert (sub->buf, 0, token->str+n+1, i-n-1);
+				if (cbuf_active->down)
+					Cbuf_DeleteStack (cbuf_active->down);
+				cbuf_active->down = sub;
+				sub->up = cbuf_active;
+				cbuf_active->state = CBUF_STATE_STACK;
+				GIB_DATA(cbuf_active)->ret.waiting = true;
+				GIB_DATA(cbuf_active)->ret.token_pos = n;
+				return -1;
+			}
+		}
+	}
+	return 0;
+}
+
 int
 GIB_Process_Token (struct dstring_s *token, char delim)
 {
-	if (delim != '{' && delim != '\"')
+	if (delim != '{' && delim != '\"') {
+		if (GIB_Process_Embedded (token))
+			return -1;
 		GIB_Process_Variables_All (token);
-			
+	}
 	if (delim == '(')
 		if (GIB_Process_Math (token))
 			return -1;

libs/util/idparse.c

@@ -153,7 +153,8 @@ COM_extract_line (cbuf_t *cbuf)
 void
 COM_parse_line (cbuf_t *cbuf)
 {
-	COM_TokenizeString (cbuf->line->str, cbuf->args);;
+	COM_TokenizeString (cbuf->line->str, cbuf->args);
+	dstring_clearstr (cbuf->line);
 }
 
 void