+void read_check(int f)
+{
+ int n;
+
+ if (read_buffer_len == 0) {
+ read_buffer_p = read_buffer;
+ }
+
+ if ((n=num_waiting(f)) <= 0)
+ return;
+
+ if (read_buffer_p != read_buffer) {
+ memmove(read_buffer,read_buffer_p,read_buffer_len);
+ read_buffer_p = read_buffer;
+ }
+
+ if (n > (read_buffer_size - read_buffer_len)) {
+ read_buffer_size += n;
+ if (!read_buffer)
+ read_buffer = (char *)malloc(read_buffer_size);
+ else
+ read_buffer = (char *)realloc(read_buffer,read_buffer_size);
+ if (!read_buffer) out_of_memory("read check");
+ read_buffer_p = read_buffer;
+ }
+
+ n = read(f,read_buffer+read_buffer_len,n);
+ if (n > 0) {
+ read_buffer_len += n;
+ }
+}
+