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/********************************************************************\
* BitlBee -- An IRC to other IM-networks gateway *
* *
* Copyright 2002-2010 Wilmer van der Gaast and others *
\********************************************************************/
/* Help file control */
/*
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 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 with
the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
Fifth Floor, Boston, MA 02110-1301 USA
*/
#define BITLBEE_CORE
#include "bitlbee.h"
#include "help.h"
#undef read
#undef write
#define BUFSIZE 2048
help_t *help_init(help_t **help, const char *helpfile)
{
int i, buflen = 0;
help_t *h;
char *s, *t;
time_t mtime;
struct stat stat[1];
*help = h = g_new0(help_t, 1);
h->fd = open(helpfile, O_RDONLY);
if (h->fd == -1) {
g_free(h);
return(*help = NULL);
}
if (fstat(h->fd, stat) != 0) {
g_free(h);
return(*help = NULL);
}
mtime = stat->st_mtime;
s = g_new(char, BUFSIZE + 1);
s[BUFSIZE] = 0;
while (((i = read(h->fd, s + buflen, BUFSIZE - buflen)) > 0) ||
(i == 0 && strstr(s, "\n%\n"))) {
buflen += i;
memset(s + buflen, 0, BUFSIZE - buflen);
if (!(t = strstr(s, "\n%\n")) || s[0] != '?') {
/* FIXME: Clean up */
help_free(help);
g_free(s);
return NULL;
}
i = strchr(s, '\n') - s;
if (h->title) {
h = h->next = g_new0(help_t, 1);
}
h->title = g_new(char, i);
strncpy(h->title, s + 1, i - 1);
h->title[i - 1] = 0;
h->fd = (*help)->fd;
h->offset.file_offset = lseek(h->fd, 0, SEEK_CUR) - buflen + i + 1;
h->length = t - s - i - 1;
h->mtime = mtime;
buflen -= (t + 3 - s);
t = g_strdup(t + 3);
g_free(s);
s = g_renew(char, t, BUFSIZE + 1);
s[BUFSIZE] = 0;
}
g_free(s);
return(*help);
}
void help_free(help_t **help)
{
help_t *h, *oh;
int last_fd = -1; /* Weak de-dupe */
if (help == NULL || *help == NULL) {
return;
}
h = *help;
while (h) {
if (h->fd == -1) {
g_free(h->offset.mem_offset);
} else if (h->fd != last_fd) {
close(h->fd);
last_fd = h->fd;
}
g_free(h->title);
h = (oh = h)->next;
g_free(oh);
}
*help = NULL;
}
char *help_get(help_t **help, char *title)
{
time_t mtime;
struct stat stat[1];
help_t *h;
for (h = *help; h; h = h->next) {
if (h->title != NULL && g_strcasecmp(h->title, title) == 0) {
break;
}
}
if (h && h->length > 0) {
char *s = g_new(char, h->length + 1);
s[h->length] = 0;
if (h->fd >= 0) {
if (fstat(h->fd, stat) != 0) {
g_free(s);
return NULL;
}
mtime = stat->st_mtime;
if (mtime > h->mtime) {
g_free(s);
return NULL;
}
if (lseek(h->fd, h->offset.file_offset, SEEK_SET) == -1 ||
read(h->fd, s, h->length) != h->length) {
g_free(s);
return NULL;
}
} else {
strncpy(s, h->offset.mem_offset, h->length);
}
return s;
}
return NULL;
}
int help_add_mem(help_t **help, const char *title, const char *content)
{
help_t *h, *l = NULL;
for (h = *help; h; h = h->next) {
if (g_strcasecmp(h->title, title) == 0) {
return 0;
}
l = h;
}
if (l) {
h = l->next = g_new0(struct help, 1);
} else {
*help = h = g_new0(struct help, 1);
}
h->fd = -1;
h->title = g_strdup(title);
h->length = strlen(content);
h->offset.mem_offset = g_strdup(content);
return 1;
}
char *help_get_whatsnew(help_t **help, int old)
{
GString *ret = NULL;
help_t *h;
int v;
for (h = *help; h; h = h->next) {
if (h->title != NULL && strncmp(h->title, "whatsnew", 8) == 0 &&
sscanf(h->title + 8, "%x", &v) == 1 && v > old) {
char *s = help_get(&h, h->title);
if (ret == NULL) {
ret = g_string_new(s);
} else {
g_string_append_printf(ret, "\n\n%s", s);
}
g_free(s);
}
}
return ret ? g_string_free(ret, FALSE) : NULL;
}
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