glcpp: Introduce new glcpp_error function.
diff --git a/glcpp/pp.c b/glcpp/pp.c
index 04ea0a4..5d1ff8c 100644
--- a/glcpp/pp.c
+++ b/glcpp/pp.c
@@ -23,6 +23,20 @@
#include "glcpp.h"
+void
+glcpp_error (YYLTYPE *locp, glcpp_parser_t *parser, const char *fmt, ...)
+{
+ parser->errors = talloc_asprintf_append(parser->errors, "%u:%u(%u): "
+ "preprocessor error: ",
+ locp->source, locp->first_line,
+ locp->first_column);
+ va_list ap;
+ va_start(ap, fmt);
+ parser->errors = talloc_vasprintf_append(parser->errors, fmt, ap);
+ va_end(ap);
+ parser->errors = talloc_strdup_append(parser->errors, "\n");
+}
+
extern int
preprocess(void *talloc_ctx, const char **shader, size_t *shader_len)
{