From 70c76b708308c72956e83163b2819be69f725a7e Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Wed, 1 Aug 2018 02:18:41 +1200
Subject: Change emit to be general, add filename to output

---
 parser.c    | 21 +++++++++------------
 parser.h    |  2 +-
 simulator.c |  2 +-
 3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/parser.c b/parser.c
index 987f26d..618df1a 100644
--- a/parser.c
+++ b/parser.c
@@ -12,15 +12,11 @@
 
 static FILE* fd;
 static struct token *cursor;
+static const char *filename;
 
-#ifdef emit_error
-#warning "Remember to remove the global emit_error"
-#undef emit_error
-#endif /* ifdef emit_error */
-
-#define emit_error(...) fprintf(stderr, "Error (%zd,%zd): ", cursor->loc.line, cursor->loc.column);\
-                        fprintf(stderr, __VA_ARGS__);\
-                        indicate_file_area(fd, cursor->loc.line, cursor->loc.column, cursor->span)
+#define emit(...) fprintf(stderr, "%s at (%zd,%zd): ", filename, cursor->loc.line, cursor->loc.column);\
+                  fprintf(stderr, __VA_ARGS__);\
+                  indicate_file_area(fd, cursor->loc.line, cursor->loc.column, cursor->span)
 
 
 //static struct op_lookup uop_handlers[] = {
@@ -49,7 +45,7 @@ expect(enum TOKEN_TYPE e) {
 	if (cursor->type != e) {
 		expected_desc = get_token_description(e);
 		observed_desc = get_token_description(cursor->type);
-		emit_error("Expected %s, got %s\n", expected_desc, observed_desc);
+		emit("Error: Expected %s, got %s\n", expected_desc, observed_desc);
 		return 1;
 	}
 
@@ -62,9 +58,10 @@ kerchunk() {
 }
 
 int
-parse(FILE *f, struct token *t) {
+parse(const char *fname, FILE *f, struct token *t) {
 	char *token_desc = "(internal error)";
 	fd = f;
+	filename = fname;
 	cursor = t;
 
 	if (expect(TOK_MODULE)) {
@@ -75,7 +72,7 @@ parse(FILE *f, struct token *t) {
 	if (expect(TOK_IDENT)) {
 		return 1;
 	}
-	emit_error("Debug: module is named %s\n", cursor->value);
+	emit("Debug: module is named %s\n", cursor->value);
 	kerchunk();
 
 	if (expect(TOK_EOL)) {
@@ -91,7 +88,7 @@ parse(FILE *f, struct token *t) {
 			/* FIXME implement everything */
 			default:
 				token_desc = get_token_description(cursor->type);
-				emit_error("Unexpected %s\n", token_desc);
+				emit("Error: Unexpected %s\n", token_desc);
 				return 1;
 		}
 	}
diff --git a/parser.h b/parser.h
index 1446650..6e28dbf 100644
--- a/parser.h
+++ b/parser.h
@@ -1 +1 @@
-int parse(FILE*, struct token *);
+int parse(const char*, FILE*, struct token *);
diff --git a/simulator.c b/simulator.c
index bbea893..1b33aec 100644
--- a/simulator.c
+++ b/simulator.c
@@ -24,7 +24,7 @@ int main(int argc, char **argv) {
 	}
 
 	struct token *tok = lex_file(fd);
-	int p = parse(fd, tok);
+	int p = parse(argv[1], fd, tok);
 
 //	gate_set_input("a", LOGIC_LOW);
 //	gate_set_input("b", LOGIC_LOW);
-- 
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