62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
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/* Copyright (C) 2007 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "mysys_priv.h"
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#include <m_string.h> /* strcmp() */
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/**
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Append str to array, or move to the end if it already exists
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@param str String to be appended
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@param array The array, terminated by a NULL element, all unused elements
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pre-initialized to NULL
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@param size Size of the array; array must be terminated by a NULL
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pointer, so can hold size - 1 elements
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@retval FALSE Success
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@retval TRUE Failure, array is full
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*/
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my_bool array_append_string_unique(const char *str,
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const char **array, size_t size)
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{
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const char **p;
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/* end points at the terminating NULL element */
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const char **end= array + size - 1;
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DBUG_ASSERT(*end == NULL);
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for (p= array; *p; ++p)
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{
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if (strcmp(*p, str) == 0)
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break;
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}
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if (p >= end)
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return TRUE; /* Array is full */
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DBUG_ASSERT(*p == NULL || strcmp(*p, str) == 0);
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while (*(p + 1))
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{
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*p= *(p + 1);
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++p;
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}
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DBUG_ASSERT(p < end);
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*p= str;
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return FALSE; /* Success */
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}
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