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-rw-r--r--drivers/acpi/acpica/utstring.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utstring.c b/drivers/acpi/acpica/utstring.c
new file mode 100644
index 000000000..c39b54830
--- /dev/null
+++ b/drivers/acpi/acpica/utstring.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: utstring - Common functions for strings and characters
+ *
+ ******************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_UTILITIES
+ACPI_MODULE_NAME("utstring")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_print_string
+ *
+ * PARAMETERS: string - Null terminated ASCII string
+ * max_length - Maximum output length. Used to constrain the
+ * length of strings during debug output only.
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
+ * sequences.
+ *
+ ******************************************************************************/
+void acpi_ut_print_string(char *string, u16 max_length)
+{
+ u32 i;
+
+ if (!string) {
+ acpi_os_printf("<\"NULL STRING PTR\">");
+ return;
+ }
+
+ acpi_os_printf("\"");
+ for (i = 0; (i < max_length) && string[i]; i++) {
+
+ /* Escape sequences */
+
+ switch (string[i]) {
+ case 0x07:
+
+ acpi_os_printf("\\a"); /* BELL */
+ break;
+
+ case 0x08:
+
+ acpi_os_printf("\\b"); /* BACKSPACE */
+ break;
+
+ case 0x0C:
+
+ acpi_os_printf("\\f"); /* FORMFEED */
+ break;
+
+ case 0x0A:
+
+ acpi_os_printf("\\n"); /* LINEFEED */
+ break;
+
+ case 0x0D:
+
+ acpi_os_printf("\\r"); /* CARRIAGE RETURN */
+ break;
+
+ case 0x09:
+
+ acpi_os_printf("\\t"); /* HORIZONTAL TAB */
+ break;
+
+ case 0x0B:
+
+ acpi_os_printf("\\v"); /* VERTICAL TAB */
+ break;
+
+ case '\'': /* Single Quote */
+ case '\"': /* Double Quote */
+ case '\\': /* Backslash */
+
+ acpi_os_printf("\\%c", (int)string[i]);
+ break;
+
+ default:
+
+ /* Check for printable character or hex escape */
+
+ if (isprint((int)string[i])) {
+ /* This is a normal character */
+
+ acpi_os_printf("%c", (int)string[i]);
+ } else {
+ /* All others will be Hex escapes */
+
+ acpi_os_printf("\\x%2.2X", (s32)string[i]);
+ }
+ break;
+ }
+ }
+
+ acpi_os_printf("\"");
+
+ if (i == max_length && string[i]) {
+ acpi_os_printf("...");
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_repair_name
+ *
+ * PARAMETERS: name - The ACPI name to be repaired
+ *
+ * RETURN: Repaired version of the name
+ *
+ * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
+ * return the new name. NOTE: the Name parameter must reside in
+ * read/write memory, cannot be a const.
+ *
+ * An ACPI Name must consist of valid ACPI characters. We will repair the name
+ * if necessary because we don't want to abort because of this, but we want
+ * all namespace names to be printable. A warning message is appropriate.
+ *
+ * This issue came up because there are in fact machines that exhibit
+ * this problem, and we want to be able to enable ACPI support for them,
+ * even though there are a few bad names.
+ *
+ ******************************************************************************/
+
+void acpi_ut_repair_name(char *name)
+{
+ u32 i;
+ u8 found_bad_char = FALSE;
+ u32 original_name;
+
+ ACPI_FUNCTION_NAME(ut_repair_name);
+
+ /*
+ * Special case for the root node. This can happen if we get an
+ * error during the execution of module-level code.
+ */
+ if (ACPI_COMPARE_NAMESEG(name, ACPI_ROOT_PATHNAME)) {
+ return;
+ }
+
+ ACPI_COPY_NAMESEG(&original_name, name);
+
+ /* Check each character in the name */
+
+ for (i = 0; i < ACPI_NAMESEG_SIZE; i++) {
+ if (acpi_ut_valid_name_char(name[i], i)) {
+ continue;
+ }
+
+ /*
+ * Replace a bad character with something printable, yet technically
+ * still invalid. This prevents any collisions with existing "good"
+ * names in the namespace.
+ */
+ name[i] = '*';
+ found_bad_char = TRUE;
+ }
+
+ if (found_bad_char) {
+
+ /* Report warning only if in strict mode or debug mode */
+
+ if (!acpi_gbl_enable_interpreter_slack) {
+ ACPI_WARNING((AE_INFO,
+ "Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
+ original_name, name));
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Invalid character(s) in name (0x%.8X), repaired: [%4.4s]",
+ original_name, name));
+ }
+ }
+}
+
+#if defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP
+/*******************************************************************************
+ *
+ * FUNCTION: ut_convert_backslashes
+ *
+ * PARAMETERS: pathname - File pathname string to be converted
+ *
+ * RETURN: Modifies the input Pathname
+ *
+ * DESCRIPTION: Convert all backslashes (0x5C) to forward slashes (0x2F) within
+ * the entire input file pathname string.
+ *
+ ******************************************************************************/
+
+void ut_convert_backslashes(char *pathname)
+{
+
+ if (!pathname) {
+ return;
+ }
+
+ while (*pathname) {
+ if (*pathname == '\\') {
+ *pathname = '/';
+ }
+
+ pathname++;
+ }
+}
+#endif