wip: does this stop -fsanitize=pointer-compare complaining

phillipwood · phillipwood · commit 34b2b12c5854 · 2022-04-20T20:46:05.000+01:00
diff --git a/usage.c b/usage.c
@@ -19,7 +19,7 @@ static void __attribute__((no_sanitize ("address","pointer-subtract","pointer-co
 	}
 	memcpy(msg, prefix, prefix_len);
 	p = msg + prefix_len;
-	if (vsnprintf(p, pend - p, err, params) < 0)
+	if (vsnprintf(p, sizeof(msg) - prefix_len, err, params) < 0)
 		*p = '\0'; /* vsnprintf() failed, clip at prefix */
 
 	for (; p != pend - 1 && *p; p++) {

Original file line number	Diff line number	Diff line change
`@@ -19,7 +19,7 @@ static void __attribute__((no_sanitize ("address","pointer-subtract","pointer-co`
`19`	`19`	`}`
`20`	`20`	`memcpy(msg, prefix, prefix_len);`
`21`	`21`	`p = msg + prefix_len;`
`22`		`- if (vsnprintf(p, pend - p, err, params) < 0)`
	`22`	`+ if (vsnprintf(p, sizeof(msg) - prefix_len, err, params) < 0)`
`23`	`23`	`p = '\0'; / vsnprintf() failed, clip at prefix */`
`24`	`24`
`25`	`25`	`for (; p != pend - 1 && *p; p++) {`