1 files changed, 55 insertions, 1 deletions
diff --git a/sys/libn/error.c b/sys/libn/error.c
index 15611a3..9b6a28a 100644
--- a/sys/libn/error.c
+++ b/sys/libn/error.c
@@ -2,7 +2,7 @@
 #include <libn.h>
 
 void 
-errorf(const byte* fmt, ...)
+errorf(byte* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
@@ -13,3 +13,57 @@ errorf(const byte* fmt, ...)
 
     va_end(args);
 }
+
+void 
+panicf(byte* fmt, ...)
+{
+    int n;
+    va_list args;
+    static byte buf[4*1024];
+    va_start(args, fmt);
+
+    buf[0] = 'p';
+    buf[1] = 'a';
+    buf[2] = 'n';
+    buf[3] = 'i';
+    buf[4] = 'c';
+    buf[5] = ':';
+    buf[6] = ' ';
+    n = vsnprintf(buf+7, arrlen(buf)-8, fmt, args);
+    if (n < 0)
+        return;
+    buf[n] = 0;
+
+    perror(buf);
+    va_end(args);
+
+    /* TODO: portable stack unwinding */
+    exit(1);
+}
+
+void 
+vpanicf(byte* fmt, va_list args) 
+{
+    int n;
+    va_list nargs;
+    static byte buf[4*1024];
+    va_copy(nargs, args);
+
+    buf[0] = 'p';
+    buf[1] = 'a';
+    buf[2] = 'n';
+    buf[3] = 'i';
+    buf[4] = 'c';
+    buf[5] = ':';
+    buf[6] = ' ';
+    n = vsnprintf(buf+7, arrlen(buf)-8, fmt, args);
+    if (n < 0)
+        return;
+    buf[n] = 0;
+
+    perror(buf);
+    va_end(nargs);
+
+    /* TODO: portable stack unwinding */
+    exit(1);
+}