Manish Goregaokar
28558fa215
Until now, we have been using temporal_rs' built in timezone data (via the jiff-tzdb crate). However, v8 already contains timezone data in the form of ICU4C's zoneinfo64.res file; we should not duplicate it. In enable-i18n mode, this loads the file using the ICU4C API for it (which, in most cases, returns a pointer to static memory). In non-i18n mode, I wrote a build script that generates a cpp file containing binary data. This needs temporal_rs >= 0.0.15, which is being worked on separately. Bug: 401065166 Change-Id: I6a6a696482b3969545899be5a50c0825ca4d4234 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6933690 Reviewed-by: Michael Achenbach <machenbach@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Manish Goregaokar <manishearth@google.com> Cr-Commit-Position: refs/heads/main@{#102427}
59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
#!/usr/bin/env python3
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# Copyright 2025 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""This program takes a file and produces another file that contains its binary
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bytes stored as uint32_ts.
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The first argument is the source path, the second argument is the destination
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path, the third is the name of the produced static.
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This program could be extended in the future to make uint8_t/etc arrays.
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This is based on ICU4C's make_data_cpp.py, but it doesn't require the file to
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have any special headers.
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"""
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import mmap
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import os
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import struct
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import sys
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HEADER = """#include <cstdint>
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#include <cstddef>
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extern "C" uint32_t {0}[] = {{"""
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FOOTER = """
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}};
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extern "C" size_t {0}_len = {1};
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"""
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def writeFile(src_path, dst_path, name):
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assert os.path.exists(src_path)
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with open(dst_path, 'w') as dst:
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dst.write(HEADER.format(name))
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with open(src_path, 'rb') as src:
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# We wish to read unsigned ints
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s = struct.Struct('@I')
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assert s.size == 4
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mm = mmap.mmap(src.fileno(), 0, access=mmap.ACCESS_READ)
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assert len(mm) % s.size == 0
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# We want to have 16 values per line
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for offset in range(0, len(mm), s.size):
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u32 = s.unpack_from(mm, offset)[0]
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if offset % 16 == 0:
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dst.write("\n ")
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dst.write(" 0x{:08x},".format(u32))
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dst.write(FOOTER.format(name, int(len(mm) / s.size)))
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mm.close()
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if __name__ == '__main__':
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writeFile(sys.argv[1], sys.argv[2], sys.argv[3])
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