diff options
Diffstat (limited to 'help.c')
| -rw-r--r-- | help.c | 217 |
1 files changed, 217 insertions, 0 deletions
@@ -0,0 +1,217 @@ + /********************************************************************\ + * 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., 59 Temple Place, + Suite 330, Boston, MA 02111-1307 USA +*/ + +#define BITLBEE_CORE +#include "bitlbee.h" +#include "help.h" +#undef read +#undef write + +#define BUFSIZE 1100 + +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 +#ifdef _WIN32 + | O_BINARY +#endif + ); + + 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 != 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 ) + 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; +} |