1 files changed, 94 insertions, 32 deletions

diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
index 173f51aa88b3..6f1ca877fc28 100644
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2009 Sylvestre Gallon. All rights reserved.
  * Copyright (c) 2009-2023 Hans Petter Selasky
  * Copyright (c) 2024 Aymeric Wibo
+ * Copyright (c) 2025 ShengYi Hung
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -31,6 +32,7 @@
 #include LIBUSB_GLOBAL_INCLUDE_FILE
 #else
 #include <assert.h>
+#include <ctype.h>
 #include <errno.h>
 #include <poll.h>
 #include <pthread.h>
@@ -84,6 +86,52 @@ static const struct libusb_version libusb_version = {
 	.describe = "https://www.freebsd.org"
 };
 
+static const struct libusb_language_context libusb_language_ctx[] = {
+	{
+	    .lang_name = "en",
+	    .err_strs = {
+			[-LIBUSB_SUCCESS] = "Success",
+			[-LIBUSB_ERROR_IO] = "I/O error",
+			[-LIBUSB_ERROR_INVALID_PARAM] = "Invalid parameter",
+			[-LIBUSB_ERROR_ACCESS] = "Permissions error",
+			[-LIBUSB_ERROR_NO_DEVICE] = "No device",
+			[-LIBUSB_ERROR_NOT_FOUND] = "Not found",
+			[-LIBUSB_ERROR_BUSY] = "Device busy",
+			[-LIBUSB_ERROR_TIMEOUT] = "Timeout",
+			[-LIBUSB_ERROR_OVERFLOW] = "Overflow",
+			[-LIBUSB_ERROR_PIPE] = "Pipe error",
+			[-LIBUSB_ERROR_INTERRUPTED] = "Interrupted",
+			[-LIBUSB_ERROR_NO_MEM] = "Out of memory",
+			[-LIBUSB_ERROR_NOT_SUPPORTED]  ="Not supported",
+			[LIBUSB_ERROR_COUNT - 1] = "Other error",
+			[LIBUSB_ERROR_COUNT] = "Unknown error",
+		}
+	},
+	{
+		.lang_name = "zh",
+		.err_strs = {
+			[-LIBUSB_SUCCESS] = "成功",
+			[-LIBUSB_ERROR_IO] = "I/O 錯誤",
+			[-LIBUSB_ERROR_INVALID_PARAM] = "不合法的參數",
+			[-LIBUSB_ERROR_ACCESS] = "權限錯誤",
+			[-LIBUSB_ERROR_NO_DEVICE] = "裝置不存在",
+			[-LIBUSB_ERROR_NOT_FOUND] = "不存在",
+			[-LIBUSB_ERROR_BUSY] = "裝置忙碌中",
+			[-LIBUSB_ERROR_TIMEOUT] = "逾時",
+			[-LIBUSB_ERROR_OVERFLOW] = "溢位",
+			[-LIBUSB_ERROR_PIPE] = "管道錯誤",
+			[-LIBUSB_ERROR_INTERRUPTED] = "被中斷",
+			[-LIBUSB_ERROR_NO_MEM] = "記憶體不足",
+			[-LIBUSB_ERROR_NOT_SUPPORTED]  ="不支援",
+			[LIBUSB_ERROR_COUNT - 1] = "其他錯誤",
+			[LIBUSB_ERROR_COUNT] = "未知錯誤",
+		}
+	},
+};
+
+static const struct libusb_language_context *default_language_context =
+    &libusb_language_ctx[0];
+
 const struct libusb_version *
 libusb_get_version(void)
 {
@@ -1728,38 +1776,26 @@ libusb_le16_to_cpu(uint16_t x)
 const char *
 libusb_strerror(int code)
 {
-	switch (code) {
-	case LIBUSB_SUCCESS:
-		return ("Success");
-	case LIBUSB_ERROR_IO:
-		return ("I/O error");
-	case LIBUSB_ERROR_INVALID_PARAM:
-		return ("Invalid parameter");
-	case LIBUSB_ERROR_ACCESS:
-		return ("Permissions error");
-	case LIBUSB_ERROR_NO_DEVICE:
-		return ("No device");
-	case LIBUSB_ERROR_NOT_FOUND:
-		return ("Not found");
-	case LIBUSB_ERROR_BUSY:
-		return ("Device busy");
-	case LIBUSB_ERROR_TIMEOUT:
-		return ("Timeout");
-	case LIBUSB_ERROR_OVERFLOW:
-		return ("Overflow");
-	case LIBUSB_ERROR_PIPE:
-		return ("Pipe error");
-	case LIBUSB_ERROR_INTERRUPTED:
-		return ("Interrupted");
-	case LIBUSB_ERROR_NO_MEM:
-		return ("Out of memory");
-	case LIBUSB_ERROR_NOT_SUPPORTED:
-		return ("Not supported");
-	case LIBUSB_ERROR_OTHER:
-		return ("Other error");
-	default:
-		return ("Unknown error");
-	}
+	int entry = -code;
+
+	if (code == LIBUSB_ERROR_OTHER)
+		entry = LIBUSB_ERROR_COUNT - 1;
+	/*
+	 * The libusb upstream considers all code out of range a
+	 * LIBUSB_ERROR_OTHER. In FreeBSD, it is a special unknown error. We
+	 * preserve the FreeBSD implementation as I think it make sense.
+	 */
+	if (entry < 0 || entry >= LIBUSB_ERROR_COUNT)
+		entry = LIBUSB_ERROR_COUNT;
+
+	/*
+	 * Fall back to English one as the translation may be unimplemented
+	 * when adding new error code.
+	 */
+	if (default_language_context->err_strs[entry] == NULL)
+		return (libusb_language_ctx[0].err_strs[entry]);
+
+	return (default_language_context->err_strs[entry]);
 }
 
 const char *
@@ -1842,3 +1878,29 @@ libusb_log_va_args(struct libusb_context *ctx, enum libusb_log_level level,
 
 	va_end(args);
 }
+
+/*
+ * Upstream code actually recognizes the first two characters to identify a
+ * language. We do so to provide API compatibility with setlocale.
+ */
+int
+libusb_setlocale(const char *locale)
+{
+	size_t idx;
+	const char *lang;
+
+	if (locale == NULL || strlen(locale) < 2 ||
+	    (locale[2] != '\0' && strchr("-_.", locale[2]) == NULL))
+		return (LIBUSB_ERROR_INVALID_PARAM);
+
+	for (idx = 0; idx < nitems(libusb_language_ctx); ++idx) {
+		lang = libusb_language_ctx[idx].lang_name;
+		if (tolower(locale[0]) == lang[0] &&
+		    tolower(locale[1]) == lang[1]) {
+			default_language_context = &libusb_language_ctx[idx];
+			return (LIBUSB_SUCCESS);
+		}
+	}
+
+	return (LIBUSB_ERROR_INVALID_PARAM);
+}