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unique.c
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/******************************************************************************
** This file is part of profile-qt
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
**
** Redistributions of source code must retain the above copyright notice,
** this list of conditions and the following disclaimer. Redistributions in
** binary form must reproduce the above copyright notice, this list of
** conditions and the following disclaimer in the documentation and/or
** other materials provided with the distribution.
**
** Neither the name of Nokia Corporation nor the names of its contributors
** may be used to endorse or promote products derived from this software
** without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
** THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
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#include "profiled_config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "unique.h"
/* ========================================================================= *
* unique_t -- methods
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* unique_ctor
* ------------------------------------------------------------------------- */
void
unique_ctor(unique_t *self)
{
self->un_count = 0;
self->un_alloc = 64;
self->un_string = malloc(self->un_alloc * sizeof *self->un_string);
*self->un_string = 0;
}
/* ------------------------------------------------------------------------- *
* unique_dtor
* ------------------------------------------------------------------------- */
void
unique_dtor(unique_t *self)
{
for( size_t i = 0; i < self->un_count; ++i )
{
free(self->un_string[i]);
}
free(self->un_string);
}
/* ------------------------------------------------------------------------- *
* unique_create
* ------------------------------------------------------------------------- */
unique_t *
unique_create(void)
{
unique_t *self = calloc(1, sizeof *self);
unique_ctor(self);
return self;
}
/* ------------------------------------------------------------------------- *
* unique_delete
* ------------------------------------------------------------------------- */
void
unique_delete(unique_t *self)
{
if( self != 0 )
{
unique_dtor(self);
free(self);
}
}
/* ------------------------------------------------------------------------- *
* unique_delete_cb
* ------------------------------------------------------------------------- */
void
unique_delete_cb(void *self)
{
unique_delete(self);
}
/* ------------------------------------------------------------------------- *
* unique_final
* ------------------------------------------------------------------------- */
char **
unique_final(unique_t *self, size_t *pcount)
{
auto int cmp(const void *a, const void *b);
auto int cmp(const void *a, const void *b)
{
return strcmp(*(const char **)a, *(const char **)b);
}
if( self->un_dirty != 0 )
{
qsort(self->un_string, self->un_count, sizeof *self->un_string, cmp);
size_t si = 0, di = 0;
char *prev = NULL;
while( si < self->un_count )
{
char *curr = self->un_string[si++];
if( prev == 0 || strcmp(prev, curr) )
{
self->un_string[di++] = prev = curr;
}
else
{
free(curr);
}
}
self->un_count = di;
self->un_dirty = 0;
self->un_string[self->un_count] = 0;
}
if( pcount != 0 )
{
*pcount = self->un_count;
}
return self->un_string;
}
/* ------------------------------------------------------------------------- *
* unique_steal
* ------------------------------------------------------------------------- */
char **
unique_steal(unique_t *self, size_t *pcount)
{
char **res = unique_final(self, pcount);
self->un_count = 0;
self->un_alloc = 0;
self->un_dirty = 0;
self->un_string = 0;
return res;
}
/* ------------------------------------------------------------------------- *
* unique_add
* ------------------------------------------------------------------------- */
void
unique_add(unique_t *self, const char *str)
{
if( self->un_count + 2 > self->un_alloc )
{
if( self->un_alloc == 0 )
{
self->un_alloc = 32;
}
else
{
self->un_alloc = self->un_alloc * 3 / 2;
}
self->un_string = realloc(self->un_string,
self->un_alloc * sizeof *self->un_string);
}
self->un_string[self->un_count++] = strdup(str ?: "");
self->un_string[self->un_count] = 0;
self->un_dirty = 1;
}