scc

commit 04c2a5d9a2b8473046e076f810ff087af02e9ef6
parent 3a48fd7f02df7f7d660beb7b4227c07cc7bf6c89
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Mon, 26 Feb 2018 13:48:24 +0100

libc: fopen(), allow for example r+b and rb+

Diffstat:
M
lib/c/_fpopen.c
 | 
25
++++++++++++++++++-------

1 file changed, 18 insertions(+), 7 deletions(-)
diff --git a/lib/c/_fpopen.c b/lib/c/_fpopen.c
@@ -14,15 +14,26 @@ _fpopen(const char * restrict fname,
 
 	flags = rw = bin = 0;
 
-	if (mode[0] == '\0)
-		goto einval;
-	if (mode[i = 1] == '+')
-		i++, rw = 1;
-	if (mode[i] == 'b')
-		i++, bin = 1;
-	if (mode[i] != '\0')
+	if (mode[0] == '\0')
 		goto einval;
 
+	for (i = 1; mode[i]; ++i) {
+		switch (mode[i]) {
+		case '+':
+			if (rw)
+				goto einval;
+			rw = 1;
+			break;
+		case 'b':
+			if (bin)
+				goto einval;
+			bin = 1;
+			break;
+		default:
+			goto einval;
+		}
+	}
+
 	switch (mode[0]) {
 	case 'a':
 		flags |= O_APPEND | O_CREAT;