# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1578928374 -7200
# Node ID 308531ac74e75dcef81418a24fe90162e074e25e
# Parent  31720ede4b50e888deb08ba1056c3e7890d9ca6e
Fix internal printf() for case of NULL string pointer, but with format
precision shorter than 6 characters where "(null)" does not fit, return
empty string instead.

diff -r 31720ede4b50 -r 308531ac74e7 th_printf.c
--- a/th_printf.c	Mon Jan 13 11:41:27 2020 +0200
+++ b/th_printf.c	Mon Jan 13 17:12:54 2020 +0200
@@ -279,12 +279,19 @@
 int th_vprintf_put_str(th_vprintf_ctx *ctx, th_vprintf_putch vputch,
     const char *str, int f_flags, const int f_width, const int f_prec)
 {
-    int nspacepad, f_len, ret = 0;
+    int nspacepad, f_len, ret;
 
     // Check for null strings
     if (str == NULL)
+    {
+        // If the "(null)" string does not fit precision, return empty
+        if (f_prec >= 0 && f_prec < 6)
+            return 0;
+
         str = "(null)";
+    }
 
+    // Compute padding etc
     f_len = strlen(str);
     if (f_prec >= 0 && f_len > f_prec)
         f_len = f_prec;