1 files changed, 46 insertions, 0 deletions

diff --git a/externals/nx_tzdb/NxTzdbCreateHeader.cmake b/externals/nx_tzdb/NxTzdbCreateHeader.cmake
new file mode 100644
index 000000000..69166aa5b
--- /dev/null
+++ b/externals/nx_tzdb/NxTzdbCreateHeader.cmake
@@ -0,0 +1,46 @@
+# SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set(ZONE_PATH ${CMAKE_ARGV3})
+set(HEADER_NAME ${CMAKE_ARGV4})
+set(NX_TZDB_INCLUDE_DIR ${CMAKE_ARGV5})
+set(NX_TZDB_SOURCE_DIR ${CMAKE_ARGV6})
+
+execute_process(
+    COMMAND ${CMAKE_COMMAND} -P ${NX_TZDB_SOURCE_DIR}/ListFilesInDirectory.cmake
+    WORKING_DIRECTORY ${ZONE_PATH}
+    OUTPUT_VARIABLE FILE_LIST)
+
+set(DIRECTORY_NAME ${HEADER_NAME})
+
+set(FILE_DATA "")
+foreach(ZONE_FILE ${FILE_LIST})
+    if ("${ZONE_FILE}" STREQUAL "\n")
+        continue()
+    endif()
+
+    string(APPEND FILE_DATA "{\"${ZONE_FILE}\",\n{")
+
+    file(READ ${ZONE_PATH}/${ZONE_FILE} ZONE_DATA HEX)
+    string(LENGTH "${ZONE_DATA}" ZONE_DATA_LEN)
+    foreach(I RANGE 0 ${ZONE_DATA_LEN} 2)
+        math(EXPR BREAK_LINE "(${I} + 2) % 38")
+
+        string(SUBSTRING "${ZONE_DATA}" "${I}" "2" HEX_DATA)
+        if ("${HEX_DATA}" STREQUAL "")
+            break()
+        endif()
+
+        string(APPEND FILE_DATA "0x${HEX_DATA},")
+        if ("${BREAK_LINE}" STREQUAL "0")
+            string(APPEND FILE_DATA "\n")
+        else()
+            string(APPEND FILE_DATA " ")
+        endif()
+    endforeach()
+
+    string(APPEND FILE_DATA "}},\n")
+endforeach()
+
+file(READ ${NX_TZDB_SOURCE_DIR}/tzdb_template.h.in NX_TZDB_TEMPLATE_H_IN)
+file(CONFIGURE OUTPUT ${NX_TZDB_INCLUDE_DIR}/nx_tzdb/${HEADER_NAME}.h CONTENT "${NX_TZDB_TEMPLATE_H_IN}")