add foreign key and list support for ucimap
authorFelix Fietkau <nbd@openwrt.org>
Fri, 28 Nov 2008 10:33:23 +0000 (11:33 +0100)
committerFelix Fietkau <nbd@openwrt.org>
Fri, 28 Nov 2008 10:33:23 +0000 (11:33 +0100)
ucimap-example.c
ucimap.c
ucimap.h

index 4309a76..3fd3765 100644 (file)
 #include <unistd.h>
 #include <ucimap.h>
 
+struct list_head ifs;
+
 struct uci_network {
        struct list_head list;
+       struct list_head alias;
 
        const char *name;
        const char *proto;
@@ -26,46 +29,96 @@ struct uci_network {
        const char *ipaddr;
        int test;
        bool enabled;
+       struct list_head aliases;
+};
+
+struct uci_alias {
+       struct list_head list;
+
+       const char *name;
+       struct uci_network *interface;
 };
 
 static int
-network_init_section(struct uci_map *map, void *section, struct uci_section *s)
+network_init_interface(struct uci_map *map, void *section, struct uci_section *s)
 {
        struct uci_network *net = section;
 
        INIT_LIST_HEAD(&net->list);
+       INIT_LIST_HEAD(&net->alias);
        net->name = s->e.name;
        net->test = -1;
        return 0;
 }
 
 static int
-network_add_section(struct uci_map *map, void *section)
+network_init_alias(struct uci_map *map, void *section, struct uci_section *s)
+{
+       struct uci_alias *alias = section;
+
+       INIT_LIST_HEAD(&alias->list);
+       alias->name = s->e.name;
+       return 0;
+}
+
+static int
+network_add_interface(struct uci_map *map, void *section)
 {
        struct uci_network *net = section;
-       struct uci_network **nptr = map->priv;
 
-       *nptr = net;
+       list_add(&net->list, &ifs);
+
        return 0;
 }
 
-struct uci_optmap network_smap_options[] = {
+static int
+network_add_alias(struct uci_map *map, void *section)
+{
+       struct uci_alias *a = section;
+
+       if (a->interface)
+               list_add(&a->list, &a->interface->alias);
+
+       return 0;
+}
+
+struct uci_sectmap network_interface;
+struct uci_sectmap network_alias;
+
+struct uci_optmap network_interface_options[] = {
        OPTMAP_OPTION(UCIMAP_STRING, struct uci_network, proto, .data.s.maxlen = 32),
        OPTMAP_OPTION(UCIMAP_STRING, struct uci_network, ifname),
        OPTMAP_OPTION(UCIMAP_STRING, struct uci_network, ipaddr),
        OPTMAP_OPTION(UCIMAP_BOOL, struct uci_network, enabled),
        OPTMAP_OPTION(UCIMAP_INT, struct uci_network, test),
+       OPTMAP_OPTION(UCIMAP_LIST | UCIMAP_SECTION, struct uci_network, aliases, .data.sm = &network_alias),
 };
 
-struct uci_sectmap network_smap[] = {
-       {
-               .type = "interface",
-               .options = network_smap_options,
-               .alloc_len = sizeof(struct uci_network),
-               .init_section = network_init_section,
-               .add_section = network_add_section,
-               .n_options = ARRAY_SIZE(network_smap_options),
-       }
+struct uci_sectmap network_interface = {
+       .type = "interface",
+       .options = network_interface_options,
+       .alloc_len = sizeof(struct uci_network),
+       .init_section = network_init_interface,
+       .add_section = network_add_interface,
+       .n_options = ARRAY_SIZE(network_interface_options),
+};
+
+struct uci_optmap network_alias_options[] = {
+       OPTMAP_OPTION(UCIMAP_SECTION, struct uci_alias, interface, .data.sm = &network_interface),
+};
+
+struct uci_sectmap network_alias = {
+       .type = "alias",
+       .options = network_alias_options,
+       .alloc_len = sizeof(struct uci_network),
+       .init_section = network_init_alias,
+       .add_section = network_add_alias,
+       .n_options = ARRAY_SIZE(network_alias_options),
+};
+
+struct uci_sectmap *network_smap[] = {
+       &network_interface,
+       &network_alias,
 };
 
 struct uci_map network_map = {
@@ -78,20 +131,21 @@ int main(int argc, char **argv)
 {
        struct uci_context *ctx;
        struct uci_package *pkg;
-       struct uci_network *net = NULL;
+       struct list_head *p, *p2;
+       struct uci_network *net;
+       struct uci_alias *alias;
 
+       INIT_LIST_HEAD(&ifs);
        ctx = uci_alloc_context();
        ucimap_init(&network_map);
 
        uci_load(ctx, "network", &pkg);
 
-       network_map.priv = &net;
        ucimap_parse(&network_map, pkg);
 
-       if (!net)
-               goto done;
-
-       printf("New network section '%s'\n"
+       list_for_each(p, &ifs) {
+               net = list_entry(p, struct uci_network, list);
+               printf("New network section '%s'\n"
                        "       type: %s\n"
                        "       ifname: %s\n"
                        "       ipaddr: %s\n"
@@ -104,10 +158,19 @@ int main(int argc, char **argv)
                        net->test,
                        (net->enabled ? "on" : "off"));
 
-       net->ipaddr = "2.3.4.5";
-       ucimap_set_changed(net, &net->ipaddr);
-       ucimap_store_section(&network_map, pkg, net);
-       uci_save(ctx, pkg);
+               list_for_each(p2, &net->aliases) {
+                       struct uci_listmap *li = list_entry(p2, struct uci_listmap, list);
+                       alias = li->data.section;
+                       printf("New alias: %s\n", alias->name);
+               }
+#if 0
+               net->ipaddr = "2.3.4.5";
+               ucimap_set_changed(net, &net->ipaddr);
+               ucimap_store_section(&network_map, pkg, net);
+               uci_save(ctx, pkg);
+#endif
+       }
+
 
 done:
        ucimap_cleanup(&network_map);
index 3c5fb31..9306036 100644 (file)
--- a/ucimap.c
+++ b/ucimap.c
 #include <unistd.h>
 #include "ucimap.h"
 
+struct uci_alloc {
+       enum ucimap_type type;
+       union {
+               void **ptr;
+               struct list_head *list;
+       } data;
+};
+
+struct uci_fixup {
+       struct list_head list;
+       struct uci_sectmap *sm;
+       const char *name;
+       struct uci_alloc target;
+};
+
+struct uci_sectmap_data {
+       struct list_head list;
+       struct uci_map *map;
+       struct uci_sectmap *sm;
+       const char *section_name;
+
+       /* list of allocations done by ucimap */
+       struct uci_alloc *allocmap;
+       unsigned long allocmap_len;
+
+       /* map for changed fields */
+       unsigned char *cmap;
+       bool done;
+};
+
 
 int
 ucimap_init(struct uci_map *map)
 {
        INIT_LIST_HEAD(&map->sdata);
+       INIT_LIST_HEAD(&map->fixup);
        return 0;
 }
 
+static void
+ucimap_free_item(struct uci_alloc *a)
+{
+       struct list_head *p, *tmp;
+       switch(a->type & UCIMAP_TYPE) {
+       case UCIMAP_SIMPLE:
+               free(a->data.ptr);
+               break;
+       case UCIMAP_LIST:
+               list_for_each_safe(p, tmp, a->data.list) {
+                       struct uci_listmap *l = list_entry(p, struct uci_listmap, list);
+                       list_del(p);
+                       free(l);
+               }
+               break;
+       }
+}
+
+static inline void
+ucimap_add_alloc(struct uci_alloc *a, void *ptr)
+{
+       a->type = UCIMAP_SIMPLE;
+       a->data.ptr = ptr;
+}
+
 static void
 ucimap_free_section(struct uci_map *map, struct uci_sectmap_data *sd)
 {
@@ -39,7 +95,7 @@ ucimap_free_section(struct uci_map *map, struct uci_sectmap_data *sd)
                sd->sm->free_section(map, section);
 
        for (i = 0; i < sd->allocmap_len; i++) {
-               free(sd->allocmap[i]);
+               ucimap_free_item(&sd->allocmap[i]);
        }
 
        free(sd->allocmap);
@@ -57,16 +113,107 @@ ucimap_cleanup(struct uci_map *map)
        }
 }
 
+static void
+ucimap_add_fixup(struct uci_map *map, void *data, struct uci_optmap *om, const char *str)
+{
+       struct uci_fixup *f;
+
+       f = malloc(sizeof(struct uci_fixup));
+       if (!f)
+               return;
+
+       INIT_LIST_HEAD(&f->list);
+       f->sm = om->data.sm;
+       f->name = str;
+       f->target.type = om->type;
+       f->target.data.ptr = data;
+       list_add(&f->list, &map->fixup);
+}
+
+static void
+ucimap_add_value(union uci_datamap *data, struct uci_optmap *om, struct uci_sectmap_data *sd, const char *str)
+{
+       union uci_datamap tdata;
+       struct list_head *list = NULL;
+       char *eptr = NULL;
+       char *s;
+       int val;
+
+       if ((om->type & UCIMAP_TYPE) == UCIMAP_LIST) {
+               if ((om->type & UCIMAP_SUBTYPE) == UCIMAP_SECTION) {
+                       ucimap_add_fixup(sd->map, data, om, str);
+                       return;
+               }
+               memset(&tdata, 0, sizeof(tdata));
+               list = &data->list;
+               data = &tdata;
+       }
+
+       switch(om->type & UCIMAP_SUBTYPE) {
+       case UCIMAP_STRING:
+               if ((om->data.s.maxlen > 0) &&
+                       (strlen(str) > om->data.s.maxlen))
+                       return;
+
+               s = strdup(str);
+               data->s = s;
+               ucimap_add_alloc(&sd->allocmap[sd->allocmap_len++], s);
+               break;
+       case UCIMAP_BOOL:
+               val = -1;
+               if (strcmp(str, "on"))
+                       val = true;
+               else if (strcmp(str, "1"))
+                       val = true;
+               else if (strcmp(str, "enabled"))
+                       val = true;
+               else if (strcmp(str, "off"))
+                       val = false;
+               else if (strcmp(str, "0"))
+                       val = false;
+               else if (strcmp(str, "disabled"))
+                       val = false;
+               if (val == -1)
+                       return;
+
+               data->b = val;
+               break;
+       case UCIMAP_INT:
+               val = strtol(str, &eptr, om->data.i.base);
+               if (!eptr || *eptr == '\0')
+                       data->i = val;
+               else
+                       return;
+               break;
+       case UCIMAP_SECTION:
+               ucimap_add_fixup(sd->map, data, om, str);
+               break;
+       }
+
+       if ((om->type & UCIMAP_TYPE) == UCIMAP_LIST) {
+               struct uci_listmap *item;
+
+               item = malloc(sizeof(struct uci_listmap));
+               if (!item)
+                       return;
+
+               INIT_LIST_HEAD(&item->list);
+               memcpy(&item->data, &tdata, sizeof(tdata));
+               list_add(&item->list, list);
+       }
+}
+
 
 static int
 ucimap_parse_options(struct uci_map *map, struct uci_sectmap *sm, struct uci_sectmap_data *sd, struct uci_section *s)
 {
-       struct uci_element *e;
+       struct uci_element *e, *l;
        struct uci_option *o;
-       void *section = sd;
+       unsigned long section;
+       union uci_datamap *data;
        int i;
 
-       section = (unsigned char *) section + sizeof(struct uci_sectmap_data);
+       section = (unsigned long) sd + sizeof(struct uci_sectmap_data);
        uci_foreach_element(&s->options, e) {
                struct uci_optmap *om = NULL;
 
@@ -77,46 +224,26 @@ ucimap_parse_options(struct uci_map *map, struct uci_sectmap *sm, struct uci_sec
                        }
                }
                if (!om)
-                       goto next_element;
+                       continue;
 
+               data = (union uci_datamap *) (section + om->offset);
                o = uci_to_option(e);
-               if(o->type != UCI_TYPE_STRING)
-                       goto next_element;
-
-               switch(om->type) {
-               case UCIMAP_STRING: {
-                       char **ptr;
-                       if ((om->data.s.maxlen > 0) &&
-                               (strlen(o->v.string) > om->data.s.maxlen))
-                               goto next_element;
-
-                       ptr = (char **) ((char *) section + om->offset);
-                       *ptr = strdup(o->v.string);
-                       sd->allocmap[sd->allocmap_len++] = *ptr;
-                       } break;
-               case UCIMAP_BOOL: {
-                       bool *ptr = (bool *)((char *)section + om->offset);
-                       if (strcmp(o->v.string, "on"))
-                               *ptr = true;
-                       else if (strcmp(o->v.string, "1"))
-                               *ptr = true;
-                       else if (strcmp(o->v.string, "enabled"))
-                               *ptr = true;
-                       else
-                               *ptr = false;
-                       } break;
-               case UCIMAP_INT: {
-                       int *ptr = (int *)((char *)section + om->offset);
-                       char *eptr = NULL;
-                       int val;
-
-                       val = strtol(o->v.string, &eptr, om->data.i.base);
-                       if (!eptr || *eptr == '\0')
-                               *ptr = val;
-                       } break;
+               if ((o->type == UCI_TYPE_STRING) && ((om->type & UCIMAP_TYPE) == UCIMAP_SIMPLE)) {
+                       ucimap_add_value(data, om, sd, o->v.string);
+                       continue;
+               }
+               if ((o->type == UCI_TYPE_LIST) && ((om->type & UCIMAP_TYPE) == UCIMAP_LIST)) {
+                       struct list_head *list;
+
+                       list = (struct list_head *) (section + om->offset);
+                       INIT_LIST_HEAD(list);
+                       sd->allocmap[sd->allocmap_len].type = UCIMAP_LIST;
+                       sd->allocmap[sd->allocmap_len++].data.list = list;
+                       uci_foreach_element(&o->v.list, l) {
+                               ucimap_add_value(data, om, sd, l->name);
+                       }
+                       continue;
                }
-next_element:
-               continue;
        }
 
        return 0;
@@ -137,8 +264,9 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectmap *sm, struct uci_sec
        memset(sd, 0, sm->alloc_len + sizeof(struct uci_sectmap_data));
        INIT_LIST_HEAD(&sd->list);
 
+       sd->map = map;
        sd->sm = sm;
-       sd->allocmap = malloc(sm->n_options * sizeof(void *));
+       sd->allocmap = malloc(sm->n_options * sizeof(struct uci_alloc));
        if (!sd->allocmap)
                goto error_mem;
 
@@ -151,8 +279,8 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectmap *sm, struct uci_sec
                goto error_mem;
 
        memset(sd->cmap, 0, BITFIELD_SIZE(sm->n_options));
-       sd->allocmap[sd->allocmap_len++] = (void *)sd->section_name;
-       sd->allocmap[sd->allocmap_len++] = (void *)sd->cmap;
+       ucimap_add_alloc(&sd->allocmap[sd->allocmap_len++], (void *)sd->section_name);
+       ucimap_add_alloc(&sd->allocmap[sd->allocmap_len++], (void *)sd->cmap);
 
        section = (char *)sd + sizeof(struct uci_sectmap_data);
 
@@ -165,10 +293,6 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectmap *sm, struct uci_sec
        if (err)
                goto error;
 
-       err = sm->add_section(map, section);
-       if (err)
-               goto error;
-
        return 0;
 
 error_mem:
@@ -246,7 +370,7 @@ ucimap_store_section(struct uci_map *map, struct uci_package *p, void *section)
                        continue;
 
                ucimap_fill_ptr(&ptr, s, om->name);
-               switch(om->type) {
+               switch(om->type & UCIMAP_SUBTYPE) {
                case UCIMAP_STRING:
                        str = *((char **) p);
                        break;
@@ -271,20 +395,72 @@ ucimap_store_section(struct uci_map *map, struct uci_package *p, void *section)
        return 0;
 }
 
+void *
+ucimap_find_section(struct uci_map *map, struct uci_fixup *f)
+{
+       struct uci_sectmap_data *sd;
+       struct list_head *p;
+       void *ret;
+
+       list_for_each(p, &map->sdata) {
+               sd = list_entry(p, struct uci_sectmap_data, list);
+               if (sd->sm != f->sm)
+                       continue;
+               if (strcmp(f->name, sd->section_name) != 0)
+                       continue;
+               ret = (char *)sd + sizeof(struct uci_sectmap_data);
+               return ret;
+       }
+       return NULL;
+}
 
 void
 ucimap_parse(struct uci_map *map, struct uci_package *pkg)
 {
        struct uci_element *e;
+       struct list_head *p, *tmp;
        int i;
 
+       INIT_LIST_HEAD(&map->fixup);
        uci_foreach_element(&pkg->sections, e) {
                struct uci_section *s = uci_to_section(e);
 
                for (i = 0; i < map->n_sections; i++) {
-                       if (strcmp(s->type, map->sections[i].type) != 0)
+                       if (strcmp(s->type, map->sections[i]->type) != 0)
                                continue;
-                       ucimap_parse_section(map, &map->sections[i], s);
+                       ucimap_parse_section(map, map->sections[i], s);
                }
        }
+       list_for_each_safe(p, tmp, &map->fixup) {
+               struct uci_fixup *f = list_entry(p, struct uci_fixup, list);
+               void *ptr = ucimap_find_section(map, f);
+               struct uci_listmap *li;
+
+               if (!ptr)
+                       continue;
+
+               switch(f->target.type & UCIMAP_TYPE) {
+               case UCIMAP_SIMPLE:
+                       *f->target.data.ptr = ptr;
+                       break;
+               case UCIMAP_LIST:
+                       li = malloc(sizeof(struct uci_listmap));
+                       memset(li, 0, sizeof(struct uci_listmap));
+                       INIT_LIST_HEAD(&li->list);
+                       li->data.section = ptr;
+                       list_add(&li->list, f->target.data.list);
+                       break;
+               }
+       }
+       list_for_each_safe(p, tmp, &map->sdata) {
+               struct uci_sectmap_data *sd = list_entry(p, struct uci_sectmap_data, list);
+               void *section;
+
+               if (sd->done)
+                       continue;
+
+               section = (char *) sd + sizeof(struct uci_sectmap_data);
+               if (sd->sm->add_section(map, section) != 0)
+                       ucimap_free_section(map, sd);
+       }
 }
index 0237fb1..43f54e0 100644 (file)
--- a/ucimap.h
+++ b/ucimap.h
@@ -44,31 +44,39 @@ struct uci_sectmap;
 struct uci_optmap;
 
 struct uci_map {
-       struct uci_sectmap *sections;
+       struct uci_sectmap **sections;
        unsigned int n_sections;
        struct list_head sdata;
+       struct list_head fixup;
 
        void *priv; /* user data */
 };
 
 enum ucimap_type {
-       UCIMAP_STRING,
-       UCIMAP_BOOL,
-       UCIMAP_INT,
+       /* types */
+       UCIMAP_SIMPLE   = 0x00,
+       UCIMAP_LIST     = 0x10,
+       UCIMAP_TYPE     = 0xf0, /* type mask */
+
+       /* subtypes */
+       UCIMAP_STRING   = 0x0,
+       UCIMAP_BOOL     = 0x1,
+       UCIMAP_INT      = 0x2,
+       UCIMAP_SECTION  = 0x3,
+       UCIMAP_SUBTYPE  = 0xf, /* subtype mask */
 };
 
-/* ucimap internal */
-struct uci_sectmap_data {
+union uci_datamap {
+       int i;
+       bool b;
+       const char *s;
+       void *section;
        struct list_head list;
-       struct uci_sectmap *sm;
-       const char *section_name;
-       unsigned long allocmap_len;
-
-       /* list of allocations done by ucimap */
-       void **allocmap;
+};
 
-       /* map for changed fields */
-       unsigned char *cmap;
+struct uci_listmap {
+       struct list_head list;
+       union uci_datamap data;
 };
 
 struct uci_sectmap {
@@ -105,6 +113,7 @@ struct uci_optmap {
                struct {
                        int maxlen;
                } s;
+               struct uci_sectmap *sm;
        } data;
 };