From 5b891011de8beaf22a854a184d9739ab63fcd7d2 Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Thu, 2 Aug 2018 00:58:55 +1200
Subject: parse: Change emit to func, misc tidy

---
 parse.c | 50 +++++++++++++++++++++-----------------------------
 1 file changed, 21 insertions(+), 29 deletions(-)

diff --git a/parse.c b/parse.c
index b8fcb92..5bd56e3 100644
--- a/parse.c
+++ b/parse.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
 
 #include "lex.h"
 #include "common.h"
@@ -9,11 +10,15 @@
 #include "logic.h"
 #include "gate.h"
 
+/** Static defs **************************************************************/
 
 static FILE* fd;
 static struct token *cursor;
 static const char *filename;
 
+
+/** Helpers ******************************************************************/
+
 #define EXPECT_AND_DISCARD_CRITICAL(type)\
 	do {                                 \
 		EXPECT_CRITICAL(type)            \
@@ -27,35 +32,20 @@ static const char *filename;
 		}                    \
 	} while (0);
 
-/* FIXME change to varadic fuction */
-#define emit(...) \
-    if (cursor) { \
-        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->loc.leading_whitespace_len, cursor->span); \
-    } else { \
-        fprintf(stderr, "%s: ", filename); \
-        fprintf(stderr, __VA_ARGS__); \
-    }
-
-
-//static struct op_lookup uop_handlers[] = {
-//	{.str = "not",   .handler = logic_nand},
-//};
-//
-//static struct op_lookup bop_handlers[] = {
-//	{.str = "and",   .handler = logic_and},
-//	{.str = "or",    .handler = logic_or},
-//	{.str = "nand",  .handler = logic_nand},
-//	{.str = "nor",   .handler = logic_nor},
-//	{.str = "xor",   .handler = logic_xor}
-//};
-//
-//static struct tok_lookup tok_handlers[] = {
-//	{.str = "input",   .handler = parse_input},
-//	{.str = "module", .handler = parse_module},
-//	{.str = "expr",   .handler = parse_expr}
-//};
+void
+emit(const char *fmt, ...) {
+	va_list args;
+	va_start(args, fmt);
+	if (cursor) {
+		fprintf(stderr, "%s at (%zd,%zd): ", filename, cursor->loc.line, cursor->loc.column);
+		vfprintf(stderr, fmt, args);
+		indicate_file_area(fd, cursor->loc.line, cursor->loc.column - cursor->loc.leading_whitespace_len, cursor->span);
+	} else {
+		fprintf(stderr, "%s: ", filename);
+		vfprintf(stderr, fmt, args);
+	}
+	va_end(args);
+}
 
 static int
 expect(enum TOKEN_TYPE e) {
@@ -83,6 +73,8 @@ kerchunk() {
 	}
 }
 
+/** Parsers ******************************************************************/
+
 int
 parse_expr(void) {
 	/* FIXME write wrapper to exit on fail */
-- 
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