68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
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/*
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(C) Copyright IBM Corp. 2007, 2008
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of IBM nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stddef.h>
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#include "ea_internal.h"
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#include <ea.h>
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#include <string.h>
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#include <spu_cache.h>
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COMPAT_EA_ALIAS (strlen_ea);
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size_ea_t
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strlen_ea (__ea const char *s)
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{
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__ea void *curr_s = (__ea void *) s;
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void *local_s;
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size_ea_t left_in_cacheline;
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void *where_null;
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size_ea_t length_of_string = 0;
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while (1)
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{
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left_in_cacheline =
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ROUND_UP_NEXT_128 ((size_ea_t) curr_s) - (size_ea_t) curr_s;
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local_s = __cache_fetch (curr_s);
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where_null = memchr (local_s, '\0', left_in_cacheline);
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if (where_null)
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{
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length_of_string += ((size_ea_t) (int) where_null - (size_ea_t)
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(int) local_s);
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return length_of_string;
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}
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/* update values to take into account what we copied */
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curr_s += left_in_cacheline;
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length_of_string += left_in_cacheline;
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}
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}
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