1 files changed, 66 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/ansiload.c b/reference/C/CONTRIB/SNIP/ansiload.c
new file mode 100755
index 0000000..e4dadc0
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/ansiload.c
@@ -0,0 +1,66 @@
+/*
+**  ANSILOAD.C - tries to detect if an ANSI-style driver is loaded
+**
+**  public domain by Bob Jarvis
+*/
+
+#include <stdio.h>
+#include <dos.h>
+
+typedef enum {FALSE, TRUE} LOGICAL;
+
+void goto_rc(int row, int col)
+{
+      union REGS regs;
+
+      regs.h.ah = 2;
+      regs.h.bh = 0;                /* assumes we're using video page 0 */
+      regs.h.dh = (unsigned char)row;
+      regs.h.dl = (unsigned char)col;
+
+      int86(0x10, &regs, &regs);
+}
+
+void get_rc(int *row, int *col)
+{
+      union REGS regs;
+
+      regs.h.ah = 3;
+      regs.h.bh = 0;                /* again, assume video page 0       */
+
+      int86(0x10, &regs, &regs);
+
+      *row = regs.h.dh;
+      *col = regs.h.dl;
+}
+
+int is_ansi_loaded(void)
+{
+      int save_r, save_c;
+      int new_r, new_c;
+      int isloaded;
+
+      get_rc(&save_r, &save_c);
+      goto_rc(15,15);
+      fputs("\x1B[0;0H", stderr);
+
+      get_rc(&new_r, &new_c);
+
+      if(new_r == 0 && new_c == 0)
+            isloaded = TRUE;
+      else
+      {
+            isloaded = FALSE;
+            fputs("\b\b\b\b\b\b      \b\b\b\b\b\b", stderr);
+      }
+
+      goto_rc(save_r, save_c);
+      return isloaded;
+}
+
+void main(void)
+{
+      if(is_ansi_loaded())
+            puts("ANSI.SYS is loaded");
+      else  puts("ANSI.SYS is NOT loaded");
+}