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/* stringbank.c, Copyright (c) 2005 Michael C. Martin */
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope thta it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Se the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "stringbank.h"
typedef stringbank chunk;
static stringbank *
add_chunk (stringbank *bank)
{
stringbank *n = malloc (sizeof (stringbank));
n->len = 0;
n->next = NULL;
if (bank)
{
while (bank->next)
bank = bank->next;
bank->next = n;
}
return n;
}
stringbank *
StringBank_Create (void)
{
return add_chunk (NULL);
}
void
StringBank_Free (stringbank *bank)
{
if (bank)
{
StringBank_Free (bank->next);
free (bank);
}
}
const char *
StringBank_AddString (stringbank *bank, const char *str)
{
unsigned int len = strlen (str) + 1;
stringbank *x = bank;
if (len > STRBANK_CHUNK_SIZE)
return NULL;
while (x) {
unsigned int remaining = STRBANK_CHUNK_SIZE - x->len;
if (len < remaining) {
char *result = x->data + x->len;
strcpy (result, str);
x->len += len;
return result;
}
x = x->next;
}
/* No room in any currently existing chunk */
x = add_chunk (bank);
strcpy (x->data, str);
x->len += len;
return x->data;
}
const char *
StringBank_AddOrFindString (stringbank *bank, const char *str)
{
unsigned int len = strlen (str) + 1;
stringbank *x = bank;
if (len > STRBANK_CHUNK_SIZE)
return NULL;
while (x) {
int i = 0;
while (i < x->len) {
if (!strcmp (x->data + i, str))
return x->data + i;
while (x->data[i]) i++;
i++;
}
x = x->next;
}
/* We didn't find it, so add it */
return StringBank_AddString (bank, str);
}
static char buffer[STRBANK_CHUNK_SIZE];
const char *
StringBank_AddSubstring (stringbank *bank, const char *str, unsigned int n)
{
unsigned int len = strlen (str);
if (n > len)
{
return StringBank_AddString (bank, str);
}
if (n >= STRBANK_CHUNK_SIZE)
{
return NULL;
}
strncpy (buffer, str, n);
buffer[n] = '\0';
return StringBank_AddString(bank, buffer);
}
const char *
StringBank_AddOrFindSubstring (stringbank *bank, const char *str, unsigned int n)
{
unsigned int len = strlen (str);
if (n > len)
{
return StringBank_AddOrFindString (bank, str);
}
if (n >= STRBANK_CHUNK_SIZE)
{
return NULL;
}
strncpy (buffer, str, n);
buffer[n] = '\0';
return StringBank_AddOrFindString(bank, buffer);
}
int
SplitString (const char *s, char splitchar, int n, const char **result, stringbank *bank)
{
int i;
const char *index = s;
for (i = 0; i < n-1; i++)
{
const char *next;
int len;
next = strchr (index, splitchar);
if (!next)
{
break;
}
len = next - index;
result[i] = StringBank_AddOrFindSubstring (bank, index, len);
index = next+1;
}
result[i] = StringBank_AddOrFindString (bank, index);
return i+1;
}
#ifdef SB_DEBUG
void
StringBank_Dump (stringbank *bank, FILE *s)
{
stringbank *x = bank;
while (x) {
int i = 0;
while (i < x->len) {
fprintf (s, "\"%s\"\n", x->data + i);
while (x->data[i]) i++;
i++;
}
x = x->next;
}
}
#endif
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