From 8f580526ac5150dc8ba9a49708ec7fd1c850bda3 Mon Sep 17 00:00:00 2001
From: levitte <levitte@b62f149e-849f-11dd-9899-c7ba65f7c4c7>
Date: Sat, 4 Oct 2008 13:03:26 +0000
Subject: [PATCH] Implement error handling in the personlization library

git-svn-id: https://yubikey-personalization.googlecode.com/svn/trunk@26 b62f149e-849f-11dd-9899-c7ba65f7c4c7
---
 ykpers.c | 24 +++++++++++++++++++++++-
 ykpers.h |  5 +++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/ykpers.c b/ykpers.c
index de0c58d..095cfae 100644
--- a/ykpers.c
+++ b/ykpers.c
@@ -271,5 +271,27 @@ int ykp_read_config(CONFIG *cfg,
 				  void *userdata),
 		    void *userdata)
 {
-	return -1;
+	ykp_errno = YKP_ENOTYETIMPL;
+	return 0;
+}
+
+/* As soon as we find a way to safely detect if we're in a threaded environment
+   or not, this should be changed to support per-thread locations.  Until then,
+   we only support non-threaded applications. */
+static int _ykp_errno = 0;
+
+int * const _ykp_errno_location(void)
+{
+	return &_ykp_errno;
+}
+
+static const char *errtext[] = {
+	"",
+	"not yet implemented"
+};
+const char *ykp_strerror(int errnum)
+{
+	if (errnum < sizeof(errtext)/sizeof(errtext[0]))
+		return errtext[errnum];
+	return NULL;
 }
diff --git a/ykpers.h b/ykpers.h
index 3438f29..6f90571 100644
--- a/ykpers.h
+++ b/ykpers.h
@@ -49,5 +49,10 @@ int ykp_read_config(CONFIG *cfg,
 				  void *userdata),
 		    void *userdata);
 
+extern int * const _ykp_errno_location(void);
+#define ykp_errno (*_ykp_errno_location())
+const char *ykp_strerror(int errnum);
+
+#define YKP_ENOTYETIMPL	0x01
 
 #endif	// __YKPERS_H_INCLUDED__
-- 
2.39.5