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37 lines
2.4 KiB
ArmAsm
37 lines
2.4 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 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/macros.internal.h"
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// Repositions open file stream.
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//
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// This function flushes the buffer (unless it's currently in the EOF
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// state) and then calls lseek() on the underlying file. If the stream
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// is in the EOF state, this function can be used to restore it without
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// needing to reopen the file.
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//
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// @param rdi is stream handle
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// @param rsi is offset is the byte delta
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// @param rdx is whence and can be SEET_SET, SEEK_CUR, or SEEK_END
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// @return 0 on success or -1 w/ errno
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// @see fflush_unlocked()
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// @threadsafe
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fseeko: mov %rdi,%r11
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ezlea fseeko_unlocked,ax
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jmp stdio_unlock
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.endfn fseeko,globl
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