From: bones_was_here <bones_was_here@xonotic.au>
Date: Mon, 15 Jan 2024 00:41:06 +0000 (+1000)
Subject: com: detect truncation or error in dpvsnprintf()
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=21fa9010ae6de8792f36cca08cb77aaa95d4b928;p=xonotic%2Fdarkplaces.git

com: detect truncation or error in dpvsnprintf()

Signed-off-by: bones_was_here <bones_was_here@xonotic.au>
---

diff --git a/common.c b/common.c
index 8db1f270..d479459c 100644
--- a/common.c
+++ b/common.c
@@ -1000,6 +1000,11 @@ int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list ar
 	if (result < 0 || (size_t)result >= buffersize)
 	{
 		buffer[buffersize - 1] = '\0';
+		// we could be inside Con_Printf
+		if (result < 0)
+			Sys_Printf("dpvsnprintf: output error, buffer size %zu\n", buffersize);
+		else
+			Sys_Printf("dpvsnprintf: truncated to %zu bytes: \"%s\"\n", buffersize - 1, buffer);
 		return -1;
 	}