add sendlen/sendstring

lib/src/tools.c

@@ -1,4 +1,37 @@
 #include "time.h"
+#include <stdint.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+
+int sendlen(int sock, char *buf, int len)
+{
+	int done, todo; 
+
+	for (todo = len; todo; todo -= done, buf += done)
+		if ((done = send(sock, buf, todo, 0)) < 0) {
+			printf("sendlen error\n");
+			return done;
+		}
+	return len;
+} 
+
+int sendstring(int sock, char *fmt, ...)
+{
+	int len;
+	uint8_t buf[2048];
+	va_list args;
+
+	va_start(args, fmt);
+	len = vsnprintf(buf, sizeof(buf), fmt, args);
+	if (len <= 0 || len >= sizeof(buf))
+		return 0;
+	sendlen(sock, buf, len);
+	va_end(args);
+	return len;
+}
 
 time_t mtime(time_t *t)
 {

lib/src/tools.h

@@ -2,5 +2,7 @@
 #define _DDDVB_TOOLS_H_
 
 time_t mtime(time_t *t);
+int sendlen(int sock, char *buf, int len);
+int sendstring(int sock, char *fmt, ...);
 
 #endif /* _DDDVB_TOOLS_H_ */