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85 lines
2.9 KiB
C
85 lines
2.9 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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static __ea char *
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similie_ls_to_ea (char *l1, __ea char *ea1, char *l2)
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{
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return (__ea char *) ((size_ea_t) ea1 +
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((size_ea_t) (int) l2 - (size_ea_t) (int) l1));
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}
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COMPAT_EA_ALIAS (strrchr_ea);
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__ea char *
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strrchr_ea (__ea const char *s, int c)
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{
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size_ea_t string_length;
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char *curr_ptr;
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__ea char *string_start_local;
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__ea char *end_of_string_ea;
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__ea char *start_of_cacheline_ea;
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char *start_of_cachline_local;
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string_start_local = __cache_fetch ((__ea char *) s);
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string_length = strlen_ea (s);
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end_of_string_ea = (__ea char *) s + string_length;
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start_of_cacheline_ea = round_down_128_ea (end_of_string_ea - 1);
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start_of_cachline_local = __cache_fetch (start_of_cacheline_ea);
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/*this next line should be the same cacheline, just the end of the string */
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curr_ptr = __cache_fetch (end_of_string_ea - 1);
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while (1)
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{
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/*search backwards through this cachline */
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while (curr_ptr >= start_of_cachline_local)
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{
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if (*curr_ptr == (char) c)
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return similie_ls_to_ea (start_of_cachline_local,
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start_of_cacheline_ea, curr_ptr);
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curr_ptr--;
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if (curr_ptr < string_start_local)
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return NULL;
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}
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/* iterate cacheline backwards */
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start_of_cacheline_ea -= 128;
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start_of_cachline_local = __cache_fetch (start_of_cacheline_ea);
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curr_ptr = __cache_fetch (start_of_cacheline_ea + 128);
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}
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}
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