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Give Emacs another performance boost

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Justine Tunney 2023-08-18 09:34:14 -07:00
parent 5b42c810a5
commit 9c7b81ee0f
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GPG key ID: BE714B4575D6E328
30 changed files with 253 additions and 102 deletions
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libc/intrin/__getenv.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dce.h"
#include "libc/intrin/getenv.internal.h"
#define ToUpper(c) \
(IsWindows() && (c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
dontasan struct Env __getenv(char **p, const char *k) {
char *t;
int i, j;
for (i = 0; (t = p[i]); ++i) {
for (j = 0;; ++j) {
if (!k[j] || k[j] == '=') {
if (!t[j]) return (struct Env){t + j, i};
if (t[j] == '=') return (struct Env){t + j + 1, i};
break;
}
if (ToUpper(k[j] & 255) != ToUpper(t[j] & 255)) {
break;
}
}
}
return (struct Env){0, i};
}