version 1.4.58b

[polyglot.git] / io.c

diff --git a/io.c b/io.c
index 478f731..6e9dde7 100644 (file)
--- a/io.c
+++ b/io.c
@@ -11,6 +11,7 @@
 #include <string.h>
 
 #include <sys/types.h>
+#include <sys/select.h>
 #include <unistd.h>
 
 #include "io.h"
@@ -63,6 +64,27 @@ void io_init(io_t * io) {
    ASSERT(io_is_ok(io));
 }
 
+// io_peek()
+
+bool io_peek(io_t * io){
+    fd_set set[1];
+    int fd_max;
+    int ret;
+    struct timeval tv;
+    tv.tv_sec=0;
+    tv.tv_usec=0;
+  
+    FD_ZERO(set);
+    FD_SET(io->in_fd,set);
+    fd_max=io->in_fd;
+    ret=select(fd_max+1,set,NULL,NULL,&tv);
+    if(ret>0){
+       return TRUE;
+    }else{
+       return FALSE;
+    }
+}
+
 // io_close()
 
 void io_close(io_t * io) {