src/stringref.c

Fri, 05 Dec 2003 16:56:03 +0000

author
Ethan Blanton <elb@pidgin.im>
date
Fri, 05 Dec 2003 16:56:03 +0000
changeset 7763
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child 7767
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permissions
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[gaim-migrate @ 8408]
This is an implementation of immutable, reference-counted strings. It
is exceedingly trivial, I have no idea why I didn't do this long
ago... PLEASE use these anywhere you pass around strings that may be
stuck in multiple places; I'm not sure that it will save us too much
heap holistically, but it should prevent having to make a hojillion
twenty-byte allocations and free them immediately.

7763
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1 /**
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2 * @file stringref.c Reference-counted strings
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3 * @ingroup core
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4 *
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5 * gaim
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6 *
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7 * Copyright (C) 2003 Ethan Blanton <elb@elitists.net>
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License as published by
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11 * the Free Software Foundation; either version 2 of the License, or
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12 * (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 * GNU General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU General Public License
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20 * along with this program; if not, write to the Free Software
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21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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22 *
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23 */
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24
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25 #include "internal.h"
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26
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27 #include <string.h>
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28
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29 #include "stringref.h"
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30
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31 GaimStringref *gaim_stringref_new(const char *value)
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32 {
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33 GaimStringref *newref;
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34
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35 newref = g_malloc(sizeof(GaimStringref) + strlen(value) + 1);
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36 strcpy(newref->value, value);
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37 newref->ref = 1;
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38
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39 return newref;
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40 }
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41
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42 GaimStringref *gaim_stringref_ref(GaimStringref *stringref)
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43 {
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44 if (stringref == NULL)
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45 return NULL;
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46 stringref->ref++;
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47 return stringref;
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48 }
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49
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50 void gaim_stringref_unref(GaimStringref *stringref)
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51 {
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52 g_return_if_fail(stringref != NULL);
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53 if (--stringref->ref == 0)
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54 g_free(stringref);
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55 }
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56
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57 const char *gaim_stringref_value(GaimStringref *stringref)
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58 {
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59 return (stringref == NULL ? NULL : stringref->value);
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60 }

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