commit 13cc0916743705e32211da7fcf5499197e36e883
from: Omar Polo <op@omarpolo.com>
date: Wed Sep 30 12:47:14 2020 UTC

improved error messages

yyerror now is a printf-like variadic function.  This helps to
generate custom error message like "invalid keysym %s" or "invalid key
%s" during parsing.

commit - ecc6fa05e1c8a3082eb9612873a27f1ebf8ffcce
commit + 13cc0916743705e32211da7fcf5499197e36e883
blob - 4e5955af2fe1ed655c3bba62b1fc22931d2df5d4
blob + 943a39c29b407715da6bf55e5a0d43d66ee83837
--- lex.l
+++ lex.l
@@ -67,9 +67,6 @@ KeySym key = 0;
 <KEY>"\""	{
 			BEGIN(INITIAL);
 
-			if (key == NoSymbol)
-				return TERR;
-
 			yylval.key = (struct key){ state, key };
 			state = 0;
 			key = 0;
@@ -81,7 +78,7 @@ KeySym key = 0;
 <KEY>M-		{ state |= Mod1Mask; }
 <KEY>s-		{ state |= Mod4Mask; }
 
-<KEY><[_a-zA-Z]+> {
+<KEY><[^>]+>	{
 			char *c;
 
 			if ((c = strdup(yytext)) == NULL)
@@ -90,7 +87,8 @@ KeySym key = 0;
 			c++;			/* skip the < */
 			c[strlen(c)-1] = '\0';	/* trim the > */
 
-			key = XStringToKeysym(c);
+			if ((key = XStringToKeysym(c)) == NoSymbol)
+				yyerror("invalid keysym %s", c);
 
 			free(--c);
 		}
@@ -101,7 +99,10 @@ KeySym key = 0;
 <KEY>"("	{ key = XK_parenleft; }
 <KEY>")"	{ key = XK_parenright; }
 
-<KEY>.		{ key = XStringToKeysym(yytext); }
+<KEY>.		{
+			if ((key = XStringToKeysym(yytext)) == NoSymbol)
+				yyerror("invalid key %s", yytext);
+		}
 
 
 %%
blob - 38d035c9d29844ffb29ddd28df94616f0668778f
blob + ed7bd95c1204a39113a29c6b727504fe3c8a9cc5
--- parse.y
+++ parse.y
@@ -19,12 +19,8 @@
 
 #include <stdio.h>
 
-#include <X11/Xlib.h>
-
 #include "star-platinum.h"
 
-void	 yyerror(const char*);
-
 /*
  * #define YYDEBUG 1
  * int yydebug = 1;
blob - 5c6cd545dc077b1bb4937d047c90389712674942
blob + 232d734c950fdfca53cb00a1cac2b6ed52927914
--- star-platinum.c
+++ star-platinum.c
@@ -17,6 +17,7 @@
 #include "star-platinum.h"
 
 #include <err.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
@@ -49,11 +50,24 @@ int ignored_modifiers[] = {
 
 #define IGNORE_MODIFIERS (LockMask | Mod2Mask | Mod3Mask | Mod5Mask)
 
+__attribute__((__format__ (__printf__, 1, 2)))
 void
-yyerror(const char *e)
+yyerror(const char *fmt, ...)
 {
+	va_list ap;
+	size_t l;
+
+	va_start(ap, fmt);
+
 	goterror = 1;
-	fprintf(stderr, "%s:%d %s\n", fname, yylineno, e);
+	fprintf(stderr, "%s:%d ", fname, yylineno);
+	vfprintf(stderr, fmt, ap);
+
+	l = strlen(fmt);
+	if (l > 0 && fmt[l-1] != '\n')
+		fprintf(stderr, "\n");
+
+	va_end(ap);
 }
 
 char *
blob - 4ed031b1a95ecbcdd4753c4ea0b3a6a416ac9298
blob + 88db9ef46ddebea1d3579a804908d39b992ff23c
--- star-platinum.h
+++ star-platinum.h
@@ -27,6 +27,8 @@
 #include <err.h>
 #include <stdlib.h>
 
+void			 yyerror(const char*, ...);
+
 struct key {
 	unsigned int modifier;
 	KeySym key;