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https://github.com/jart/cosmopolitan.git
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9849b4c7ba
This change also fixes the clock_nanosleep() api and polyfills futexes on Windows, Mac, and NetBSD using exponential backoff.
45 lines
2.3 KiB
C
45 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/fmt/fmt.h"
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#include "libc/mem/mem.h"
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#include "libc/str/str.h"
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#include "third_party/nsync/testing/smprintf.h"
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// clang-format off
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char *smprintf (const char *fmt, ...) {
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int m = strlen (fmt) * 2 + 1;
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char *buf = (char *) malloc (m);
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int didnt_fit;
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do {
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va_list ap;
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int x;
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va_start (ap, fmt);
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x = vsnprintf (buf, m, fmt, ap);
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va_end (ap);
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if (x >= m) {
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buf = (char *) realloc (buf, m = x+1);
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didnt_fit = 1;
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} else if (x < 0 || x == m-1) {
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buf = (char *) realloc (buf, m *= 2);
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didnt_fit = 1;
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} else {
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didnt_fit = 0;
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}
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} while (didnt_fit);
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return (buf);
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}
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