mlist: extract squeeze_slash

GNUmakefile

@@ -33,6 +33,7 @@ mshow : filter.o safe_u8putstr.o rfc2231.o pipeto.o
 mscan : pipeto.o
 msort : mystrverscmp.o
 mmime : slurp.o
+mlist : squeeze_slash.o
 
 museragent: FRC
 	@printf '#!/bin/sh\nprintf "User-Agent: mblaze/%s (%s)\\n"\n' \

blaze822.h

@@ -97,3 +97,6 @@ void safe_u8putstr(char *s0, size_t l, FILE *stream);
 pid_t pipeto(const char *cmdline);
 int pipeclose(pid_t pid);
 
+// squeeze_slash.c
+
+void squeeze_slash(char *);

mlist.c

@@ -168,17 +168,7 @@ listdir(char *dir)
 void
 listarg(char *arg)
 {
-	char *s, *t;
-
-	// squeeze slashes
-	s = t = arg;
-	while ((*s++ = *t))
-		while (*t++ == '/' && *t == '/')
-			;
-	// remove trailing slashes
-	s--;
-	while (*--s == '/')
-		*s = 0;
+	squeeze_slash(arg);
 
 	struct stat st;
 	if (stat(arg, &st) < 0)

squeeze_slash.c

@@ -0,0 +1,15 @@
+void
+squeeze_slash(char *arg) {
+	char *s, *t;
+
+	// squeeze slashes
+	s = t = arg;
+	while ((*s++ = *t))
+		while (*t++ == '/' && *t == '/')
+			;
+
+	// remove trailing slashes
+	s--;
+	while (*--s == '/')
+		*s = 0;
+}