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PRIV.C
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1994-01-30
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453 lines
/* Copyright (C) 1990, 1993 Free Software Foundation, Inc.
This file is part of GNU ISPELL.
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, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "ispell.h"
#include "hash.h"
static int p_nextsize = 53; /* first hash size, should be prime */
static char **p_hash, **p_end;
static int p_size, p_used, p_thresh;
static int p_modified;
int
p_lookup (word, alllower)
char *word;
int alllower;
{
int code;
char **pe;
char local[MAX_WORD_LEN], *p, *q;
if (p_size == 0)
return (0);
if (alllower)
{
p = word; /* already lower case */
}
else
{
downcase (local, word);
p = local;
}
code = hash (p) % p_size;
pe = p_hash + code;
while ((q = *pe))
{
if (*q == '!')
q++;
if (strcmp (q, p) == 0)
return (1);
pe++;
if (pe == p_end)
pe = p_hash;
}
return (0);
}
int
p_delete (word)
char *word;
{
int code;
char **pe;
char local[MAX_WORD_LEN], *p, *q;
if (p_size == 0)
return (-1);
downcase (local, word);
p = local;
code = hash (p) % p_size;
pe = p_hash + code;
while ((q = *pe))
{
if (*q == '!')
q++;
if (strcmp (q, p) == 0)
{
(*pe)[0] = '#';
(*pe)[1] = 0;
p_modified = 1;
return (0);
}
pe++;
if (pe == p_end)
pe = p_hash;
}
return (-1);
}
int
p_enter (word, copy, keep)
char *word;
int copy, keep;
{
int newsize;
char **oldp_hash, **pe, *p, *q;
int oldp_used, oldp_size;
int code, i;
if (*word == 0)
return (-1);
if (p_used + 1 >= p_thresh)
{
newsize = p_nextsize;
if (newsize < 0 || newsize < p_size)
return (-1);
oldp_hash = p_hash;
oldp_used = p_used;
oldp_size = p_size;
p_hash = (char **) xcalloc ((unsigned) newsize, sizeof (char *));
p_used = 0;
p_size = newsize;
p_thresh = p_size / 2;
p_end = p_hash + p_size;
for (i = 0, pe = oldp_hash; i < oldp_size; i++, pe++)
{
if (*pe)
{
if (p_enter (*pe, 0, 1) < 0)
{
p_hash = oldp_hash;
p_used = oldp_used;
p_size = oldp_size;
p_thresh = p_size / 2;
p_end = p_hash + p_size;
return (-1);
}
}
}
if (oldp_hash)
free ((char *) oldp_hash);
p_nextsize = nextprime ((unsigned short) (newsize * 2));
}
if (word[0] == '!')
{
p = word;
code = hash (p + 1);
}
else if (keep)
{
if (copy)
{
p = (char *) xmalloc ((unsigned) (strlen (word) + 1));
if (copy == 1)
downcase (p, word);
else
(void) strcpy (p, word);
}
else
{
p = word;
}
code = hash (p);
}
else
{
p = (char *) xmalloc ((unsigned) (strlen (word) + 2));
p[0] = '!';
downcase (p + 1, word);
code = hash (p + 1);
}
/* make sure it is not already there */
pe = p_hash + (code % p_size);
while ((q = *pe))
{
if (*q == '!')
{
if (strcmp (q + 1, p) == 0)
{
/* he did 'A', now 'I', skip the '!' */
(*pe)++;
return (0);
}
}
else if (strcmp (q, p) == 0)
{
return (0);
}
pe++;
if (pe == p_end)
pe = p_hash;
}
*pe = p;
p_used++;
if (keep)
p_modified = 1;
addchars (p);
return (0);
}
int
p_load (file, keep)
char *file;
int keep;
{
FILE *f;
int nwords;
int c;
char buf[MAX_WORD_LEN], *p, *start;
int omodified;
omodified = p_modified;
if ((f = fopen (file, "r")) == NULL)
return (-1);
nwords = 0;
while ((c = getc (f)) != EOF)
if (c == '\n')
nwords++;
p_nextsize += nextprime ((unsigned) ((nwords + 20) * 2));
rewind (f);
while (fgets (buf, sizeof buf, f) != NULL)
{
if (buf[0] == '#')
continue;
downcase (buf, buf);
start = buf;
while (isspace (*start))
start++;
for (p = start; *p && !isspace (*p); p++)
;
*p = 0;
if (*start == 0)
continue;
addchars (start);
if (p_enter (start, 1, keep) < 0)
{
(void) fclose (f);
return (-1);
}
}
(void) fclose (f);
p_modified = omodified;
return (0);
}
void
addchars (word)
char *word;
{
char *p;
int c;
for (p = word; *p; p++)
{
/* characters above 128 and certain ascii
* characters can be promoted to be LEXLETTERS
* if they appear in the ispell.words file
*/
c = *(unsigned char *) p;
if (c >= 128 || strchr ("$*+-/_~", c) != NULL)
{
(ctbl + 1)[c] |= LEXLETTER;
if (near_map[c] == 0)
{
near_map[c] = 1;
near_miss_letters[nnear_miss_letters++]
= c;
}
}
}
}
char *
make_backup_filename(p)
char *p;
{
char *bakname = (char *) xmalloc (strlen (p) + 2);
strcpy(bakname, p);
#if defined(MSDOS) || defined(OS2)
{
int len, extlen;
char *q;
if ((p = strrchr(bakname, '.')) == NULL)
p = bakname + strlen(bakname);
for (q = p; q != bakname; )
if (strchr(":/\\", *--q)) break;
extlen = strlen(p); len = p - q;
if (extlen <= 4 && len <= 8) { /* then assume FAT */
switch(extlen) {
case 0:
if (len == 8)
strcat(bakname, ".");
break;
case 4:
p[3] = '\0';
break;
}
}
}
#endif
return(strcat(bakname, "~"));
}
int
p_dump (file)
char *file;
{
FILE *f;
char **pe;
char *bakname;
if (p_size == 0 || p_modified == 0)
return (0);
bakname = make_backup_filename(file);
(void) unlink (bakname);
if (link (file, bakname) >= 0)
(void) unlink (file);
if ((f = fopen (file, "w")) == NULL)
{
free (bakname);
return (-1);
}
pe = p_hash;
while (pe != p_end)
{
if (*pe && **pe != '!' && **pe != '#')
{
fputs (*pe, f);
putc ('\n', f);
}
pe++;
}
if (ferror (f))
{
(void) fclose (f);
(void) unlink (file);
(void) link (bakname, file);
(void) unlink (bakname);
free (bakname);
return (-1);
}
(void) fclose (f);
p_modified = 0;
(void) unlink (bakname);
free (bakname);
return (0);
}
int
p_reload ()
{
char **pe;
extern char *privname;
if (privname == (char *) NULL)
return (-1);
if (p_size)
{
pe = p_hash;
while (pe != p_end)
{
if (*pe)
free (*pe);
pe++;
}
free ((char *) p_hash);
}
p_nextsize = 53;
p_hash = (char **) NULL;
p_end = (char **) NULL;
p_size = 0;
p_used = 0;
p_thresh = 0;
p_modified = 0;
return (p_load (privname, 1));
}
#if 0
main ()
{
char buf[100];
char *p;
if (p_load ("testpriv", 1) < 0)
(void) printf ("couldn't load testpriv\n");
while (gets (buf) != NULL)
{
switch (buf[0])
{
case 'l':
p = buf + 2;
if (p_lookup (p, 0))
(void) printf ("%s: ok\n", p);
else
(void) printf ("%s: not found\n", p);
break;
case 'i':
case 'a':
p = buf + 2;
while (*p)
{
if (isupper (*p))
*p = _tolower (*p);
p++;
}
p = buf + 2;
if (p_enter (p, 1, buf[0] == 'i' ? 1 : 0) < 0)
(void) printf ("enter failed\n");
else
(void) printf ("ok\n");
break;
default:
(void) printf ("unknown cmd %s\n", buf);
break;
}
}
if (p_dump ("testpriv") < 0)
(void) printf ("dump failed\n");
}
#endif