From 2a619a21d4af6cbc5033f987b2aa25ef2b749600 Mon Sep 17 00:00:00 2001
From: Fredrik Tolf <fredrik@dolda2000.com>
Date: Thu, 27 Feb 2014 09:50:06 +0100
Subject: [PATCH] lib: Added a BSD mtio implementation.

---
 configure.in | 10 ++++++++--
 lib/mtio.c   | 39 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/configure.in b/configure.in
index 1242e84..1ddf173 100644
--- a/configure.in
+++ b/configure.in
@@ -22,15 +22,21 @@ if test "$HAS_MAGIC" = no; then
 fi
 
 AH_TEMPLATE(HAVE_GLIBC_STDIO, [define to indicate system support for glibc cookie streams])
+AH_TEMPLATE(HAVE_BSD_STDIO, [define to indicate system support for BSD-style funopen streams])
 
 HAS_FOPENCOOKIE=yes
 AC_CHECK_FUNC(fopencookie, [], [HAS_FOPENCOOKIE=no])
 AC_CHECK_MEMBER([cookie_io_functions_t.read], [], [HAS_FOPENCOOKIE=no])
 
+HAS_FUNOPEN=yes
+AC_CHECK_FUNC(funopen, [], [HAS_FUNOPEN=no])
+
 if test "$HAS_FOPENCOOKIE" = yes; then
-   	AC_DEFINE(HAVE_GLIBC_STDIO)
+        AC_DEFINE(HAVE_GLIBC_STDIO)
+elif test "$HAS_FUNOPEN" = yes; then
+        AC_DEFINE(HAVE_BSD_STDIO)
 else
-   	AC_MSG_ERROR([*** libc support for custom stdio streams is required])
+        AC_MSG_ERROR([*** libc support for custom stdio streams is required])
 fi
 
 AH_TEMPLATE(HAVE_VALGRIND, [define to include debugging support for Valgrind])
diff --git a/lib/mtio.c b/lib/mtio.c
index b994cc2..70a0949 100644
--- a/lib/mtio.c
+++ b/lib/mtio.c
@@ -107,7 +107,7 @@ static int mtclose(void *cookie)
     return(0);
 }
 
-#ifdef HAVE_GLIBC_STDIO
+#if defined(HAVE_GLIBC_STDIO)
 static cookie_io_functions_t iofuns = {
     .read = mtread,
     .write = mtwrite,
@@ -130,6 +130,43 @@ FILE *mtstdopen(int fd, int issock, int timeout, char *mode)
 	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
     return(ret);
 }
+#elif defined(HAVE_BSD_STDIO)
+static int bsd2mtread(void *cookie, char *buf, int len)
+{
+    return(mtread(cookie, buf, len));
+}
+
+static int bsd2mtwrite(void *cookie, const char *buf, int len)
+{
+    return(mtwrite(cookie, buf, len));
+}
+
+FILE *mtstdopen(int fd, int issock, int timeout, char *mode)
+{
+    struct stdiofd *d;
+    FILE *ret;
+    int r, w;
+    
+    if(!strcmp(mode, "r")) {
+	r = 1; w = 0;
+    } else if(!strcmp(mode, "w")) {
+	r = 0; w = 1;
+    } else if(!strcmp(mode, "r+")) {
+	r = w = 1;
+    } else {
+	return(NULL);
+    }
+    omalloc(d);
+    d->fd = fd;
+    d->sock = issock;
+    d->timeout = timeout;
+    ret = funopen(d, r?bsd2mtread:NULL, w?bsd2mtwrite:NULL, NULL, mtclose);
+    if(!ret)
+	free(d);
+    else
+	fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
+    return(ret);
+}
 #else
 #error "No stdio implementation for this system"
 #endif
-- 
2.11.0