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-rw-r--r--libical/src/libicalss/icalcluster.c423
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diff --git a/libical/src/libicalss/icalcluster.c b/libical/src/libicalss/icalcluster.c
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+/* -*- Mode: C -*-
+ ======================================================================
+ FILE: icalcluster.c
+ CREATOR: eric 23 December 1999
+
+ $Id$
+ $Locker$
+
+ (C) COPYRIGHT 1999 Eric Busboom
+ http://www.softwarestudio.org
+
+ The contents of this file are subject to the Mozilla Public License
+ Version 1.0 (the "License"); you may not use this file except in
+ compliance with the License. You may obtain a copy of the License at
+ http://www.mozilla.org/MPL/
+
+ Software distributed under the License is distributed on an "AS IS"
+ basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ the License for the specific language governing rights and
+ limitations under the License.
+
+ The Original Code is eric. The Initial Developer of the Original
+ Code is Eric Busboom
+
+
+ ======================================================================*/
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#include "icalcluster.h"
+#include <errno.h>
+#include <limits.h> /* For PATH_MAX */
+#include <sys/stat.h> /* for stat */
+#include <unistd.h> /* for stat, getpid */
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h> /* for fcntl */
+#include <unistd.h> /* for fcntl */
+
+icalerrorenum icalcluster_create_cluster(char *path);
+
+struct icalcluster_impl {
+ char *path;
+ icalcomponent* cluster;
+ int changed;
+ FILE* stream;
+};
+
+icalcluster* icalcluster_new_impl()
+{
+ struct icalcluster_impl* comp;
+
+ if ( ( comp = (struct icalcluster_impl*)
+ malloc(sizeof(struct icalcluster_impl))) == 0) {
+ icalerror_set_errno(ICAL_NEWFAILED_ERROR);
+ errno = ENOMEM;
+ return 0;
+ }
+
+ return comp;
+}
+
+char* read_from_file(char *s, size_t size, void *d)
+{
+ char *c = fgets(s,size, (FILE*)d);
+ return c;
+}
+
+icalcluster* icalcluster_new(char* path)
+{
+ struct icalcluster_impl *impl = icalcluster_new_impl();
+ struct stat sbuf;
+ int createclusterfile = 0;
+ icalerrorenum error = ICAL_NO_ERROR;
+ icalparser *parser;
+ struct icaltimetype tt;
+ off_t cluster_file_size;
+
+ memset(&tt,0,sizeof(struct icaltimetype));
+
+ icalerror_clear_errno();
+ icalerror_check_arg_rz( (path!=0), "path");
+
+ if (impl == 0){
+ return 0;
+ }
+
+ /*impl->path = strdup(path); icalcluster_load does this */
+ impl->changed = 0;
+
+ impl->cluster = 0;
+
+ impl->path = 0;
+ impl->stream = 0;
+
+ /* Check if the path already exists and if it is a regular file*/
+ if (stat(path,&sbuf) != 0){
+
+ /* A file by the given name does not exist, or there was
+ another error */
+ cluster_file_size = 0;
+ if (errno == ENOENT) {
+ /* It was because the file does not exist */
+ createclusterfile = 1;
+ } else {
+ /* It was because of another error */
+ icalerror_set_errno(ICAL_FILE_ERROR);
+ return 0;
+ }
+ } else {
+ /* A file by the given name exists, but is it a regular file */
+
+ if (!S_ISREG(sbuf.st_mode)){
+ /* Nope, not a directory */
+ icalerror_set_errno(ICAL_FILE_ERROR);
+ return 0;
+ } else {
+ /* Lets assume that it is a file of the right type */
+ cluster_file_size = sbuf.st_size;
+ createclusterfile = 0;
+ }
+ }
+
+ /* if cluster does not already exist, create it */
+
+ if (createclusterfile == 1) {
+ error = icalcluster_create_cluster(path);
+
+ if (error != ICAL_NO_ERROR){
+ icalerror_set_errno(error);
+ return 0;
+ }
+ }
+
+ impl->path = (char*)strdup(path);
+
+ errno = 0;
+ impl->stream = fopen(impl->path,"r");
+
+ if (impl->stream ==0 || errno != 0){
+ impl->cluster = 0;
+ icalerror_set_errno(ICAL_FILE_ERROR); /* Redundant, actually */
+ return 0;
+ }
+
+ icalcluster_lock(impl);
+
+ if(cluster_file_size > 0){
+ parser = icalparser_new();
+ icalparser_set_gen_data(parser,impl->stream);
+ impl->cluster = icalparser_parse(parser,read_from_file);
+ icalparser_free(parser);
+
+ if (icalcomponent_isa(impl->cluster) != ICAL_XROOT_COMPONENT){
+ /* The parser got a single component, so it did not put it in
+ an XROOT. */
+ icalcomponent *cl = impl->cluster;
+ impl->cluster = icalcomponent_new(ICAL_XROOT_COMPONENT);
+ icalcomponent_add_component(impl->cluster,cl);
+ }
+
+ } else {
+
+ impl->cluster = icalcomponent_new(ICAL_XROOT_COMPONENT);
+ }
+
+ if (impl->cluster == 0){
+ icalerror_set_errno(ICAL_PARSE_ERROR);
+ return 0;
+ }
+
+ if (error != ICAL_NO_ERROR){
+ return 0;
+ }
+
+ return impl;
+}
+
+void icalcluster_free(icalcluster* cluster)
+{
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rv((cluster!=0),"cluster");
+
+ if (impl->cluster != 0){
+ icalcluster_commit(cluster);
+ icalcomponent_free(impl->cluster);
+ impl->cluster=0;
+ }
+
+ if(impl->path != 0){
+ free(impl->path);
+ impl->path = 0;
+ }
+
+ if(impl->stream != 0){
+ icalcluster_unlock(impl);
+ fclose(impl->stream);
+ impl->stream = 0;
+ }
+
+ free(impl);
+}
+
+char* icalcluster_path(icalcluster* cluster)
+{
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+ icalerror_check_arg_rz((cluster!=0),"cluster");
+
+ return impl->path;
+}
+
+
+int icalcluster_lock(icalcluster *cluster)
+{
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+ struct flock lock;
+ int fd;
+
+ icalerror_check_arg_rz((impl->stream!=0),"impl->stream");
+
+ fd = fileno(impl->stream);
+
+ lock.l_type = F_WRLCK; /* F_RDLCK, F_WRLCK, F_UNLCK */
+ lock.l_start = 0; /* byte offset relative to l_whence */
+ lock.l_whence = SEEK_SET; /* SEEK_SET, SEEK_CUR, SEEK_END */
+ lock.l_len = 0; /* #bytes (0 means to EOF) */
+
+ return (fcntl(fd, F_SETLKW, &lock));
+}
+
+int icalcluster_unlock(icalcluster *cluster)
+{
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+ int fd;
+ struct flock lock;
+ icalerror_check_arg_rz((impl->stream!=0),"impl->stream");
+
+ fd = fileno(impl->stream);
+
+ lock.l_type = F_WRLCK; /* F_RDLCK, F_WRLCK, F_UNLCK */
+ lock.l_start = 0; /* byte offset relative to l_whence */
+ lock.l_whence = SEEK_SET; /* SEEK_SET, SEEK_CUR, SEEK_END */
+ lock.l_len = 0; /* #bytes (0 means to EOF) */
+
+ return (fcntl(fd, F_UNLCK, &lock));
+
+}
+
+icalerrorenum icalcluster_create_cluster(char *path)
+{
+
+ FILE* f;
+ int r;
+ icalcomponent *c;
+
+ icalerror_clear_errno();
+
+ f = fopen(path,"w");
+
+ if (f == 0){
+ icalerror_set_errno(ICAL_FILE_ERROR);
+ return ICAL_FILE_ERROR;
+ }
+
+
+ /* This used to write data to the file... */
+
+
+ fclose(f);
+
+ return ICAL_NO_ERROR;
+}
+
+icalerrorenum icalcluster_commit(icalcluster* cluster)
+{
+ FILE *f;
+ char tmp[PATH_MAX]; /* HACK Buffer overflow potential */
+ char *str;
+ icalparser *parser;
+ icalcomponent *c;
+
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_re((impl!=0),"cluster",ICAL_BADARG_ERROR);
+
+ if (impl->changed == 0 ){
+ return ICAL_NO_ERROR;
+ }
+
+#ifdef ICAL_SAFESAVES
+ snprintf(tmp,PATH_MAX,"%s-tmp",impl->path);
+#else
+ strcpy(tmp,impl->path);
+#endif
+
+ if ( (f = fopen(tmp,"w")) < 0 ){
+ icalerror_set_errno(ICAL_FILE_ERROR);
+ return ICAL_FILE_ERROR;
+ }
+
+ for(c = icalcomponent_get_first_component(impl->cluster,ICAL_ANY_COMPONENT);
+ c != 0;
+ c = icalcomponent_get_next_component(impl->cluster,ICAL_ANY_COMPONENT)){
+
+ str = icalcomponent_as_ical_string(c);
+
+ if ( fwrite(str,sizeof(char),strlen(str),f) < strlen(str)){
+ fclose(f);
+ return ICAL_FILE_ERROR;
+ }
+ }
+
+ fclose(f);
+ impl->changed = 0;
+
+#ifdef ICAL_SAFESAVES
+ rename(tmp,impl->path); /* HACK, should check for error here */
+#endif
+
+ return ICAL_NO_ERROR;
+
+}
+
+void icalcluster_mark(icalcluster* cluster){
+
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rv((impl!=0),"cluster");
+
+ impl->changed = 1;
+
+}
+
+icalcomponent* icalcluster_get_component(icalcluster* cluster){
+ struct icalcluster_impl *impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_re((impl!=0),"cluster",ICAL_BADARG_ERROR);
+
+ return impl->cluster;
+}
+
+
+/* manipulate the components in the cluster */
+
+icalerrorenum icalcluster_add_component(icalcluster *cluster,
+ icalcomponent* child)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rv((cluster!=0),"cluster");
+ icalerror_check_arg_rv((child!=0),"child");
+
+ icalcomponent_add_component(impl->cluster,child);
+
+ icalcluster_mark(cluster);
+
+ return ICAL_NO_ERROR;
+
+}
+
+icalerrorenum icalcluster_remove_component(icalcluster *cluster,
+ icalcomponent* child)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rv((cluster!=0),"cluster");
+ icalerror_check_arg_rv((child!=0),"child");
+
+ icalcomponent_remove_component(impl->cluster,child);
+
+ icalcluster_mark(cluster);
+
+ return ICAL_NO_ERROR;
+}
+
+int icalcluster_count_components(icalcluster *cluster,
+ icalcomponent_kind kind)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ if(cluster == 0){
+ icalerror_set_errno(ICAL_BADARG_ERROR);
+ return -1;
+ }
+
+ return icalcomponent_count_components(impl->cluster,kind);
+}
+
+/* Iterate through components */
+icalcomponent* icalcluster_get_current_component (icalcluster* cluster)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rz((cluster!=0),"cluster");
+
+ return icalcomponent_get_current_component(impl->cluster);
+}
+
+icalcomponent* icalcluster_get_first_component(icalcluster* cluster,
+ icalcomponent_kind kind)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rz((cluster!=0),"cluster");
+
+ return icalcomponent_get_first_component(impl->cluster,kind);
+}
+
+icalcomponent* icalcluster_get_next_component(icalcluster* cluster,
+ icalcomponent_kind kind)
+{
+ struct icalcluster_impl* impl = (struct icalcluster_impl*)cluster;
+
+ icalerror_check_arg_rz((cluster!=0),"cluster");
+
+ return icalcomponent_get_next_component(impl->cluster,kind);
+}
+
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