More fun changes

* Play around with strdup() since it isn't actually part of ISO C.
* Get code to compile under c89, c99, and gnu99
* Rework open_listener() to use getaddrinfo()

Signed-off-by: Dan McGee <dpmcgee@gmail.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..b422bde
--- /dev/null
+++ b/util.c
@@ -0,0 +1,66 @@
+/*
+ *  util.c - Onkyo receiver utility functions
+ *
+ *  Copyright (c) 2008 Dan McGee <dpmcgee@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h> /* malloc */
+#include <unistd.h> /* close, read, write */
+#include <errno.h>  /* for errno refs */
+#include <string.h> /* memcpy */
+
+void xclose(int fd)
+{
+	while(close(fd) && errno == EINTR);
+}
+
+ssize_t xread(int fd, void *buf, size_t len)
+{
+	ssize_t nr;
+	while(1) {
+		nr = read(fd, buf, len);
+		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+			continue;
+		return nr;
+	}
+}
+
+ssize_t xwrite(int fd, const void *buf, size_t len)
+{
+	ssize_t nr;
+	while(1) {
+		nr = write(fd, buf, len);
+		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+			continue;
+		return nr;
+	}
+}
+
+/* if using ISO C, strdup() is not actually defined, provide our own */
+#ifndef strdup
+char *strdup(const char *s)
+{
+	char *ret = NULL;
+	if(s)  {
+		const size_t len = strlen(s) + 1;
+		ret = malloc(len * sizeof(char));
+		if(ret)
+			memcpy(ret, s, len);
+	}
+	return(ret);
+}
+#endif /* strdup */
+