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https://github.com/jart/cosmopolitan.git
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b01282e23e
This reduces the virtual memory usage of Emacs for me by 30%. We now have a simpler implementation that uses read(), rather mmap()ing the whole executable.
46 lines
2.8 KiB
C
46 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/safemacros.internal.h"
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#include "libc/runtime/zipos.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/s.h"
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#include "libc/zip.internal.h"
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int __zipos_stat_impl(struct Zipos *zipos, int cf, struct stat *st) {
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bzero(st, sizeof(*st));
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st->st_nlink = 1;
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st->st_dev = zipos->dev;
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st->st_blksize = FRAMESIZE;
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if (cf == ZIPOS_SYNTHETIC_DIRECTORY) {
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st->st_mode = S_IFDIR | (0555 & ~atomic_load_explicit(
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&__umask, memory_order_acquire));
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} else {
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st->st_mode = GetZipCfileMode(zipos->cdir + cf);
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st->st_size = GetZipCfileUncompressedSize(zipos->cdir + cf);
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st->st_blocks =
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roundup(GetZipCfileCompressedSize(zipos->cdir + cf), 512) / 512;
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GetZipCfileTimestamps(zipos->cdir + cf, &st->st_mtim, &st->st_atim,
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&st->st_ctim, 0);
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st->st_birthtim = st->st_ctim;
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}
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return 0;
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}
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