mcmartin
a82bcf1338
git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2661 8092fc87-c524-0410-9efc-e669fe64eaf9
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
/* stringbank.c, Copyright (c) 2005 Michael C. Martin */
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/*
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope thta 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. Se the
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* GNU General Public License for more details.
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*
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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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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "stringbank.h"
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#define CHUNK_SIZE (1024 - sizeof (void *) - sizeof (int))
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typedef struct _stringbank_chunk {
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char data[CHUNK_SIZE];
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int len;
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struct _stringbank_chunk *next;
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} chunk;
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static chunk *bank = NULL;
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static void
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add_chunk (void)
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{
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chunk *n = malloc (sizeof (chunk));
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n->len = 0;
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n->next = bank;
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bank = n;
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}
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const char *
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StringBank_AddString (const char *str)
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{
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int len = strlen (str);
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chunk *x = bank;
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if (len > CHUNK_SIZE)
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return NULL;
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while (x) {
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int remaining = CHUNK_SIZE - x->len;
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if (len < remaining) {
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char *result = x->data + x->len;
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strcpy (result, str);
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x->len += len + 1;
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return result;
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}
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x = x->next;
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}
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/* No room in any currently existing chunk */
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add_chunk ();
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strcpy (bank->data, str);
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bank->len += len + 1;
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return bank->data;
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}
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const char *
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StringBank_AddOrFindString (const char *str)
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{
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int len = strlen (str);
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chunk *x = bank;
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if (len > CHUNK_SIZE)
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return NULL;
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while (x) {
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int i = 0;
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while (i < x->len) {
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if (!strcmp (x->data + i, str))
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return x->data + i;
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while (x->data[i]) i++;
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i++;
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}
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x = x->next;
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}
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/* We didn't find it, so add it */
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return StringBank_AddString (str);
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}
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#ifdef DEBUG
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void
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StringBank_Dump (FILE *s)
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{
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chunk *x = bank;
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while (x) {
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int i = 0;
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while (i < x->len) {
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fprintf (s, "\"%s\"\n", x->data + i);
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while (x->data[i]) i++;
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i++;
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}
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x = x->next;
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}
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}
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#endif
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