ucimap: add custom free() callbacks for options, only used on custom datatypes

diff --git a/ucimap-example.c b/ucimap-example.c
index bf70eb1..c59e72c 100644 (file)
--- a/ucimap-example.c
+++ b/ucimap-example.c
@@ -27,7 +27,7 @@ struct uci_network {
        const char *name;
        const char *proto;
        const char *ifname;
-       unsigned char ipaddr[4];
+       unsigned char *ipaddr;
        int test;
        bool enabled;
        struct ucimap_list *aliases;
@@ -44,13 +44,18 @@ struct uci_alias {
 static int
 network_parse_ip(void *section, struct uci_optmap *om, union ucimap_data *data, const char *str)
 {
-       unsigned char *target = (unsigned char *) data->s;
+       unsigned char *target;
        int tmp[4];
        int i;
 
        if (sscanf(str, "%d.%d.%d.%d", &tmp[0], &tmp[1], &tmp[2], &tmp[3]) != 4)
                return -1;
 
+       target = malloc(4);
+       if (!target)
+               return -1;
+
+       *data->data = target;
        for (i = 0; i < 4; i++)
                target[i] = (char) tmp[i];
 
@@ -61,7 +66,7 @@ static int
 network_format_ip(void *sction, struct uci_optmap *om, union ucimap_data *data, char **str)
 {
        static char buf[16];
-       unsigned char *ip = (unsigned char *) data->s;
+       unsigned char *ip = (unsigned char *) data->data[0];
 
        sprintf(buf, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
        *str = buf;
@@ -69,6 +74,12 @@ network_format_ip(void *sction, struct uci_optmap *om, union ucimap_data *data,
        return 0;
 }
 
+static void
+network_free_ip(void *section, struct uci_optmap *om, void *ptr)
+{
+       free(ptr);
+}
+
 static int
 network_init_interface(struct uci_map *map, void *section, struct uci_section *s)
 {
@@ -151,6 +162,7 @@ static struct my_optmap network_interface_options[] = {
                        .name = "ipaddr",
                        .parse = network_parse_ip,
                        .format = network_format_ip,
+                       .free = network_free_ip,
                }
        },
        {
@@ -234,7 +246,13 @@ int main(int argc, char **argv)
        ucimap_parse(&network_map, pkg);
 
        list_for_each(p, &ifs) {
+               const unsigned char *ipaddr;
+
                net = list_entry(p, struct uci_network, list);
+               ipaddr = net->ipaddr;
+               if (!ipaddr)
+                       ipaddr = (const unsigned char *) "\x00\x00\x00\x00";
+
                printf("New network section '%s'\n"
                        "       type: %s\n"
                        "       ifname: %s\n"
@@ -244,8 +262,7 @@ int main(int argc, char **argv)
                        net->name,
                        net->proto,
                        net->ifname,
-                       net->ipaddr[0], net->ipaddr[1],
-                       net->ipaddr[2], net->ipaddr[3],
+                       ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3],
                        net->test,
                        (net->enabled ? "on" : "off"));
 

diff --git a/ucimap.c b/ucimap.c
index 5751156..6d97b07 100644 (file)
--- a/ucimap.c
+++ b/ucimap.c
@@ -29,6 +29,12 @@ struct uci_alloc {
        } data;
 };
 
+struct uci_alloc_custom {
+       void *section;
+       struct uci_optmap *om;
+       void *ptr;
+};
+
 struct uci_fixup {
        struct list_head list;
        struct uci_sectionmap *sm;
@@ -153,6 +159,14 @@ ucimap_free_section(struct uci_map *map, struct ucimap_section_data *sd)
                ucimap_free_item(&sd->allocmap[i]);
        }
 
+       if (sd->alloc_custom) {
+               for (i = 0; i < sd->alloc_custom_len; i++) {
+                       struct uci_alloc_custom *a = &sd->alloc_custom[i];
+                       a->om->free(a->section, a->om, a->ptr);
+               }
+               free(sd->alloc_custom);
+       }
+
        free(sd->allocmap);
        free(sd);
 }
@@ -237,6 +251,16 @@ ucimap_add_fixup(struct ucimap_section_data *sd, union ucimap_data *data, struct
 }
 
 static void
+ucimap_add_custom_alloc(struct ucimap_section_data *sd, struct uci_optmap *om, void *ptr)
+{
+       struct uci_alloc_custom *a = &sd->alloc_custom[sd->alloc_custom_len++];
+
+       a->section = ucimap_section_ptr(sd);
+       a->om = om;
+       a->ptr = ptr;
+}
+
+static void
 ucimap_add_value(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 {
        union ucimap_data tdata = *data;
@@ -296,6 +320,10 @@ ucimap_add_value(union ucimap_data *data, struct uci_optmap *om, struct ucimap_s
        if (om->parse) {
                if (om->parse(ucimap_section_ptr(sd), om, &tdata, str) < 0)
                        return;
+               if (ucimap_is_custom(om->type) && om->free) {
+                       if (tdata.ptr != data->ptr)
+                               ucimap_add_custom_alloc(sd, om, data->ptr);
+               }
        }
        if (ucimap_is_custom(om->type))
                return;
@@ -448,6 +476,15 @@ failed:
        return false;
 }
 
+static void
+ucimap_count_alloc(struct uci_optmap *om, int *n_alloc, int *n_custom)
+{
+       if (ucimap_is_alloc(om->type))
+               (*n_alloc)++;
+       else if (ucimap_is_custom(om->type) && om->free)
+               (*n_custom)++;
+}
+
 int
 ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 {
@@ -455,6 +492,7 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucim
        char *section_name;
        void *section;
        int n_alloc = 2;
+       int n_alloc_custom = 0;
        int err;
 
        INIT_LIST_HEAD(&sd->list);
@@ -469,6 +507,7 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucim
                        union ucimap_data *data;
                        struct uci_element *e;
                        int n_elements = 0;
+                       int n_elements_custom = 0;
                        int size;
 
                        data = ucimap_get_data(sd, om);
@@ -481,7 +520,7 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucim
 
                                if (o->type == UCI_TYPE_LIST) {
                                        uci_foreach_element(&o->v.list, tmp) {
-                                               n_elements++;
+                                               ucimap_count_alloc(om, &n_elements, &n_elements_custom);
                                        }
                                } else if ((o->type == UCI_TYPE_STRING) &&
                                           ucimap_is_list_auto(om->type)) {
@@ -494,43 +533,50 @@ ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucim
                                                        break;
 
                                                n_elements++;
+                                               ucimap_count_alloc(om, &n_elements, &n_elements_custom);
 
                                                while (*data && !isspace(*data))
                                                        data++;
                                        } while (*data);
 
                                        /* for the duplicated data string */
-                                       if (n_elements > 0)
+                                       if (n_elements)
                                                n_alloc++;
                                }
                                break;
                        }
                        /* add one more for the ucimap_list */
                        n_alloc += n_elements + 1;
+                       n_alloc_custom += n_elements_custom;
                        size = sizeof(struct ucimap_list) +
                                n_elements * sizeof(union ucimap_data);
                        data->list = malloc(size);
                        memset(data->list, 0, size);
-               } else if (ucimap_is_alloc(om->type)) {
-                       n_alloc++;
+               } else {
+                       ucimap_count_alloc(om, &n_alloc, &n_alloc_custom);
                }
        }
 
-       sd->allocmap = malloc(n_alloc * sizeof(struct uci_alloc));
+       sd->allocmap = calloc(n_alloc, sizeof(struct uci_alloc));
        if (!sd->allocmap)
                goto error_mem;
 
+       if (n_alloc_custom > 0) {
+               sd->alloc_custom = calloc(n_alloc_custom, sizeof(struct uci_alloc_custom));
+               if (!sd->alloc_custom)
+                       goto error_mem;
+       }
+
        section_name = strdup(s->e.name);
        if (!section_name)
                goto error_mem;
 
        sd->section_name = section_name;
 
-       sd->cmap = malloc(BITFIELD_SIZE(sm->n_options));
+       sd->cmap = calloc(1, BITFIELD_SIZE(sm->n_options));
        if (!sd->cmap)
                goto error_mem;
 
-       memset(sd->cmap, 0, BITFIELD_SIZE(sm->n_options));
        ucimap_add_alloc(sd, (void *)section_name);
        ucimap_add_alloc(sd, (void *)sd->cmap);
        ucimap_foreach_option(sm, om) {

diff --git a/ucimap.h b/ucimap.h
index fd40865..2195e78 100644 (file)
--- a/ucimap.h
+++ b/ucimap.h
@@ -84,6 +84,8 @@
 struct uci_sectionmap;
 struct uci_optmap;
 struct ucimap_list;
+struct uci_alloc;
+struct uci_alloc_custom;
 
 struct uci_map {
        struct uci_sectionmap **sections;
@@ -121,6 +123,7 @@ union ucimap_data {
        bool b;
        char *s;
        void *ptr;
+       void **data;
        struct ucimap_list *list;
 };
 
@@ -132,7 +135,9 @@ struct ucimap_section_data {
 
        /* list of allocations done by ucimap */
        struct uci_alloc *allocmap;
-       unsigned long allocmap_len;
+       struct uci_alloc_custom *alloc_custom;
+       unsigned int allocmap_len;
+       unsigned int alloc_custom_len;
 
        /* map for changed fields */
        unsigned char *cmap;
@@ -181,6 +186,7 @@ struct uci_optmap {
        int detected_type;
        int (*parse)(void *section, struct uci_optmap *om, union ucimap_data *data, const char *string);
        int (*format)(void *section, struct uci_optmap *om, union ucimap_data *data, char **string);
+       void (*free)(void *section, struct uci_optmap *om, void *ptr);
        union {
                struct {
                        int base;