1 files changed, 161 insertions, 0 deletions
diff --git a/payloads/libpayload/curses/pdcurses-backend/pdcscrn.c b/payloads/libpayload/curses/pdcurses-backend/pdcscrn.c
new file mode 100644
index 0000000000..b8d9e4e3d6
--- /dev/null
+++ b/payloads/libpayload/curses/pdcurses-backend/pdcscrn.c
@@ -0,0 +1,161 @@
+/* Public Domain Curses */
+
+#include "lppdc.h"
+
+#include <stdlib.h>
+
+#ifdef CHTYPE_LONG
+# define PDC_OFFSET 32
+#else
+# define PDC_OFFSET  8
+#endif
+
+/* COLOR_PAIR to attribute encoding table. */
+
+unsigned char *pdc_atrtab = (unsigned char *)NULL;
+
+short curstoreal[16], realtocurs[16] =
+{
+    COLOR_BLACK, COLOR_BLUE, COLOR_GREEN, COLOR_CYAN, COLOR_RED,
+    COLOR_MAGENTA, COLOR_YELLOW, COLOR_WHITE, COLOR_BLACK + 8,
+    COLOR_BLUE + 8, COLOR_GREEN + 8, COLOR_CYAN + 8, COLOR_RED + 8,
+    COLOR_MAGENTA + 8, COLOR_YELLOW + 8, COLOR_WHITE + 8
+};
+
+/* close the physical screen -- may restore the screen to its state 
+   before PDC_scr_open(); miscellaneous cleanup */
+
+void PDC_scr_close(void)
+{
+    PDC_LOG(("PDC_scr_close() - called\n"));
+
+    reset_shell_mode();
+
+    if (SP->visibility != 1)
+        curs_set(1);
+
+    /* Position cursor to the bottom left of the screen. */
+
+    PDC_gotoyx(PDC_get_rows() - 2, 0);
+}
+
+void PDC_scr_free(void)
+{
+    if (SP)
+        free(SP);
+    if (pdc_atrtab)
+        free(pdc_atrtab);
+
+    pdc_atrtab = (unsigned char *)NULL;
+}
+
+/* open the physical screen -- allocate SP, miscellaneous intialization, 
+   and may save the existing screen for later restoration */
+
+int PDC_scr_open(int argc, char **argv)
+{
+    int i;
+
+    PDC_LOG(("PDC_scr_open() - called\n"));
+
+    SP = calloc(1, sizeof(SCREEN));
+    pdc_atrtab = calloc(PDC_COLOR_PAIRS * PDC_OFFSET, 1);
+
+    if (!SP || !pdc_atrtab)
+        return ERR;
+
+    for (i = 0; i < 16; i++)
+        curstoreal[realtocurs[i]] = i;
+
+    SP->orig_attr = FALSE;
+
+    SP->lines = PDC_get_rows();
+    SP->cols = PDC_get_columns();
+
+#if CONFIG_SPEAKER
+    SP->audible = TRUE;
+#endif
+
+    return OK;
+}
+
+/* the core of resize_term() */
+
+int PDC_resize_screen(int nlines, int ncols)
+{
+    PDC_LOG(("PDC_resize_screen() - called. Lines: %d Cols: %d\n",
+             nlines, ncols));
+
+    return ERR;
+}
+
+void PDC_reset_prog_mode(void)
+{
+        PDC_LOG(("PDC_reset_prog_mode() - called.\n"));
+}
+
+void PDC_reset_shell_mode(void)
+{
+        PDC_LOG(("PDC_reset_shell_mode() - called.\n"));
+}
+
+void PDC_restore_screen_mode(int i)
+{
+}
+
+void PDC_save_screen_mode(int i)
+{
+}
+
+void PDC_init_pair(short pair, short fg, short bg)
+{
+    unsigned char att, temp_bg;
+    chtype i;
+
+    fg = curstoreal[fg];
+    bg = curstoreal[bg];
+
+    for (i = 0; i < PDC_OFFSET; i++)
+    {
+        att = fg | (bg << 4);
+
+        if (i & (A_REVERSE >> PDC_ATTR_SHIFT))
+            att = bg | (fg << 4);
+        if (i & (A_UNDERLINE >> PDC_ATTR_SHIFT))
+            att = 1;
+        if (i & (A_INVIS >> PDC_ATTR_SHIFT))
+        {
+            temp_bg = att >> 4;
+            att = temp_bg << 4 | temp_bg;
+        }
+        if (i & (A_BOLD >> PDC_ATTR_SHIFT))
+            att |= 8;
+        if (i & (A_BLINK >> PDC_ATTR_SHIFT))
+            att |= 128;
+
+        pdc_atrtab[pair * PDC_OFFSET + i] = att;
+    }
+}
+
+int PDC_pair_content(short pair, short *fg, short *bg)
+{
+    *fg = realtocurs[pdc_atrtab[pair * PDC_OFFSET] & 0x0F];
+    *bg = realtocurs[(pdc_atrtab[pair * PDC_OFFSET] & 0xF0) >> 4];
+
+    return OK;
+}
+
+bool PDC_can_change_color(void)
+{
+    return FALSE;
+}
+
+int PDC_color_content(short color, short *red, short *green, short *blue)
+{
+    return ERR;
+}
+
+int PDC_init_color(short color, short red, short green, short blue)
+{
+    return ERR;
+}