try to show errors more usefully.

Signed-off-by: Peter Jones <pjones@redhat.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/errlog.c b/errlog.c
new file mode 100644
index 00000000..fd789335
--- /dev/null
+++ b/errlog.c
@@ -0,0 +1,90 @@
+/*
+ * errlog.c
+ * Copyright 2017 Peter Jones <pjones@redhat.com>
+ *
+ * Distributed under terms of the GPLv3 license.
+ */
+
+#include "shim.h"
+
+#ifdef LogError
+#undef LogError
+#endif
+
+static CHAR16 **errs = NULL;
+static UINTN nerrs = 0;
+
+EFI_STATUS
+VLogError(const char *file, int line, const char *func, CHAR16 *fmt, va_list args)
+{
+	va_list args2;
+	UINTN size = 0, size2;
+	CHAR16 **newerrs;
+
+	size = SPrint(NULL, 0, L"%a:%d %a() ", file, line, func);
+	va_copy(args2, args);
+	size2 = VSPrint(NULL, 0, fmt, args2);
+	va_end(args2);
+
+	newerrs = ReallocatePool(errs, (nerrs + 1) * sizeof(*errs),
+				       (nerrs + 3) * sizeof(*errs));
+	if (!newerrs)
+		return EFI_OUT_OF_RESOURCES;
+
+	newerrs[nerrs] = AllocatePool(size*2+2);
+	if (!newerrs[nerrs])
+		return EFI_OUT_OF_RESOURCES;
+	newerrs[nerrs+1] = AllocatePool(size2*2+2);
+	if (!newerrs[nerrs+1])
+		return EFI_OUT_OF_RESOURCES;
+
+	SPrint(newerrs[nerrs], size*2+2, L"%a:%d %a() ", file, line, func);
+	va_copy(args2, args);
+	VSPrint(newerrs[nerrs+1], size2*2+2, fmt, args2);
+	va_end(args2);
+
+	nerrs += 2;
+	newerrs[nerrs] = NULL;
+	errs = newerrs;
+
+	return EFI_SUCCESS;
+}
+
+EFI_STATUS
+LogError(const char *file, int line, const char *func, CHAR16 *fmt, ...)
+{
+	va_list args;
+	EFI_STATUS status;
+
+	va_start(args, fmt);
+	status = VLogError(file, line, func, fmt, args);
+	va_end(args);
+
+	return status;
+}
+
+VOID
+PrintErrors(VOID)
+{
+	UINTN i;
+
+	if (!verbose)
+		return;
+
+	for (i = 0; i < nerrs; i++)
+		Print(L"%s", errs[i]);
+}
+
+VOID
+ClearErrors(VOID)
+{
+	UINTN i;
+
+	for (i = 0; i < nerrs; i++)
+		FreePool(errs[i]);
+	FreePool(errs);
+	nerrs = 0;
+	errs = NULL;
+}
+
+// vim:fenc=utf-8:tw=75