(2006-08-06) rescue-bootcd

extra/syslinux-3.09/sample/conio.c

@@ -0,0 +1,61 @@
+#ident "$Id: conio.c,v 1.4 2005/01/03 08:23:16 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2001-2003 H. Peter Anvin - All Rights Reserved
+ *
+ *   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, Inc., 53 Temple Place Ste 330,
+ *   Boston MA 02111-1307, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * conio.c
+ *
+ * Output to the screen
+ */
+
+#include <com32.h>
+#include <stdarg.h>
+
+#define NULL ((void *)0)
+
+static inline void memset(void *buf, int ch, unsigned int len)
+{
+  asm volatile("cld; rep; stosb"
+	       : "+D" (buf), "+c" (len) : "a" (ch) : "memory");
+}
+
+int putchar(int ch)
+{
+  com32sys_t regs;
+
+  memset(&regs, 0, sizeof regs);
+
+  if ( ch == '\n' ) {
+    /* \n -> \r\n */
+    putchar('\r');
+  }
+  
+  regs.eax.b[1] = 0x02;
+  regs.edx.b[0] = ch;
+  __com32.cs_intcall(0x21, &regs, NULL);
+
+  return ch;
+}
+
+/* Note: doesn't put '\n' like the stdc version does */
+int puts(const char *s)
+{
+  int count = 0;
+
+  while ( *s ) {
+    putchar(*s);
+    count++;
+    s++;
+  }
+
+  return count;
+}