efi_selftest: updating the cursor position

The test case for text output is updated to check correct updating
of the cursor position.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_selftest/efi_selftest_textoutput.c

@@ -23,6 +23,13 @@ static int execute(void)
 	size_t background;
 	size_t attrib;
 	efi_status_t ret;
+	s16 col;
+	u16 cr[] = { 0x0d, 0x00 };
+	u16 lf[] = { 0x0a, 0x00 };
+	u16 brahmi[] = { /* 2 Brahmi letters */
+		0xD804, 0xDC05,
+		0xD804, 0xDC22,
+		0};
 
 	/* SetAttribute */
 	efi_st_printf("\nColor palette\n");
@@ -42,6 +49,77 @@ static int execute(void)
 		efi_st_error("TestString failed for ANSI characters\n");
 		return EFI_ST_FAILURE;
 	}
+	/* OutputString */
+	ret = con_out->output_string(con_out,
+				     L"Testing cursor column update\n");
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for ANSI characters");
+		return EFI_ST_FAILURE;
+	}
+	col = con_out->mode->cursor_column;
+	ret = con_out->output_string(con_out, lf);
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for line feed\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column != col) {
+		efi_st_error("Cursor column changed by line feed\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, cr);
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for carriage return\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column) {
+		efi_st_error("Cursor column not 0 at beginning of line\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, L"123");
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for ANSI characters\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column != 3) {
+		efi_st_error("Cursor column not incremented properly\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, L"\b");
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for backspace\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column != 2) {
+		efi_st_error("Cursor column not decremented properly\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, L"\b\b");
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for backspace\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column) {
+		efi_st_error("Cursor column not decremented properly\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, L"\b\b");
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_error("OutputString failed for backspace\n");
+		return EFI_ST_FAILURE;
+	}
+	if (con_out->mode->cursor_column) {
+		efi_st_error("Cursor column decremented past zero\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = con_out->output_string(con_out, brahmi);
+	if (ret != EFI_ST_SUCCESS) {
+		efi_st_todo("Unicode output not fully supported\n");
+	} else if (con_out->mode->cursor_column != 2) {
+		efi_st_printf("Unicode not handled properly\n");
+		return EFI_ST_FAILURE;
+	}
+	efi_st_printf("\n");
+
 	return EFI_ST_SUCCESS;
 }