[PATCH 1/3] Add yyerrorf() for formatted error messages.

[Scott Wood]

Signed-off-by: Scott Wood <scottwood at freescale.com>
---
 dtc-parser.y |   16 +++++++++++++---
 srcpos.h     |    1 +
 treesource.c |    1 -
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/dtc-parser.y b/dtc-parser.y
index 002ea7f..ddb7f27 100644
--- a/dtc-parser.y
+++ b/dtc-parser.y
@@ -307,15 +307,25 @@ label:
 
 %%
 
-void yyerror (char const *s)
+void yyerrorf(char const *s, ...)
 {
 	const char *fname = srcpos_filename_for_num(yylloc.filenum);
+	va_list va;
+	va_start(va, s);
 
 	if (strcmp(fname, "-") == 0)
 		fname = "stdin";
 
-	fprintf(stderr, "%s:%d %s\n",
-		fname, yylloc.first_line, s);
+	fprintf(stderr, "%s:%d ", fname, yylloc.first_line);
+	vfprintf(stderr, s, va);
+	fprintf(stderr, "\n");
+
+	va_end(va);
+}
+
+void yyerror (char const *s)
+{
+	yyerrorf("%s", s);
 }
 
 unsigned long long eval_literal(const char *s, int base, int bits)
diff --git a/srcpos.h b/srcpos.h
index ce7ab5b..e59c788 100644
--- a/srcpos.h
+++ b/srcpos.h
@@ -63,6 +63,7 @@ typedef struct YYLTYPE {
 
 
 extern void yyerror(char const *);
+extern void yyerrorf(char const *, ...) __attribute__((format(printf, 1, 2)));
 
 extern int srcpos_filenum;
 
diff --git a/treesource.c b/treesource.c
index a6a7767..e7d580f 100644
--- a/treesource.c
+++ b/treesource.c
@@ -23,7 +23,6 @@
 
 extern FILE *yyin;
 extern int yyparse(void);
-extern void yyerror(char const *);
 
 struct boot_info *the_boot_info;
 
-- 
1.5.3