X-Git-Url: http://git.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=uci.h;h=97bff7d337d620ddd130d307370764b8b69d57cc;hp=fe05bb3cc34138bd531e22461d1011bd1ceea110;hb=9080634cc6339051c5a9943be181888b0e994cd2;hpb=87e893157980abef163575ad7aedbcc96c41b0c6

diff --git a/uci.h b/uci.h
index fe05bb3..97bff7d 100644
--- a/uci.h
+++ b/uci.h
@@ -15,6 +15,10 @@
 #ifndef __LIBUCI_H
 #define __LIBUCI_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "uci_config.h"
 
 /*
@@ -56,11 +60,13 @@ struct uci_list
 };
 
 struct uci_ptr;
+struct uci_plugin;
+struct uci_hook_ops;
 struct uci_element;
 struct uci_package;
 struct uci_section;
 struct uci_option;
-struct uci_history;
+struct uci_delta;
 struct uci_context;
 struct uci_backend;
 struct uci_parse_context;
@@ -83,6 +89,16 @@ extern void uci_free_context(struct uci_context *ctx);
  */
 extern void uci_perror(struct uci_context *ctx, const char *str);
 
+/**
+ * uci_geterror: Get an error string for the last uci error
+ * @ctx: uci context
+ * @dest: target pointer for the string
+ * @str: prefix for the error message
+ *
+ * Note: string must be freed by the caller
+ */
+extern void uci_get_errorstr(struct uci_context *ctx, char **dest, const char *str);
+
 /**
  * uci_import: Import uci config data from a stream
  * @ctx: uci context
@@ -92,7 +108,7 @@ extern void uci_perror(struct uci_context *ctx, const char *str);
  * @single: ignore the 'package' keyword and parse everything into a single package
  *
  * the name parameter is for config files that don't explicitly use the 'package <...>' keyword
- * if 'package' points to a non-null struct pointer, enable history tracking and merge 
+ * if 'package' points to a non-null struct pointer, enable delta tracking and merge
  */
 extern int uci_import(struct uci_context *ctx, FILE *stream, const char *name, struct uci_package **package, bool single);
 
@@ -123,44 +139,23 @@ extern int uci_load(struct uci_context *ctx, const char *name, struct uci_packag
 extern int uci_unload(struct uci_context *ctx, struct uci_package *p);
 
 /**
- * uci_lookup: Look up an uci element
- *
- * @ctx: uci context
- * @res: where to store the result
- * @package: uci_package struct 
- * @section: config section (optional)
- * @option: option to search for (optional)
- *
- * If section is omitted, then a pointer to the config package is returned
- * If option is omitted, then a pointer to the config section is returned
- */
-extern int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_package *package, const char *section, const char *option);
-
-/**
- * uci_lookup_ptr: Split an uci tuple string and look up elements
+ * uci_lookup_ptr: Split an uci tuple string and look up an element tree
  * @ctx: uci context
  * @ptr: lookup result struct
  * @str: uci tuple string to look up
  * @extended: allow extended syntax lookup
- */
-extern int uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool extended);
-
-/**
- * uci_lookup_ext: Extended lookup for an uci element
  *
- * @ctx: uci context
- * @res: where to store the result
- * @ptr: uci pointer tuple
- *
- * Looks up an element using the extended syntax.
- * It can look up sections by an index with an optional type.
+ * if extended is set to true, uci_lookup_ptr supports the following
+ * extended syntax:
  *
  * Examples:
  *   network.@interface[0].ifname ('ifname' option of the first interface section)
  *   network.@interface[-1]       (last interface section)
- * Note: uci_lookup_ext will automatically load a config package if necessary
+ * Note: uci_lookup_ptr will automatically load a config package if necessary
+ * @str must not be constant, as it will be modified and used for the strings inside @ptr,
+ * thus it must also be available as long as @ptr is in use.
  */
-extern int uci_lookup_ext(struct uci_context *ctx, struct uci_element **res, char *ptr);
+extern int uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool extended);
 
 /**
  * uci_add_section: Add an unnamed section
@@ -171,78 +166,49 @@ extern int uci_lookup_ext(struct uci_context *ctx, struct uci_element **res, cha
  */
 extern int uci_add_section(struct uci_context *ctx, struct uci_package *p, const char *type, struct uci_section **res);
 
-/**
- * uci_set_element_value: Replace an element's value with a new one
- * @ctx: uci context
- * @element: pointer to an uci_element struct pointer
- * @value: new value
- * 
- * Only valid for uci_option and uci_section. Will replace the type string
- * when used with an uci_section
- */
-extern int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, const char *value);
-
-/**
- * uci_add_element_list: Append a string to a list option
- * @ctx: uci context
- * @option: pointer to the uci option element
- * @value: string to append
- */
-extern int uci_add_element_list(struct uci_context *ctx, struct uci_option *o, const char *value);
-
 /**
  * uci_set: Set an element's value; create the element if necessary
  * @ctx: uci context
- * @package: package name
- * @section: section name
- * @option: option name
- * @value: value (option) or type (section)
- * @result: store the updated element in this variable (optional)
+ * @ptr: uci pointer
+ *
+ * The updated/created element is stored in ptr->last
  */
-extern int uci_set(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option, const char *value, struct uci_element **result);
+extern int uci_set(struct uci_context *ctx, struct uci_ptr *ptr);
 
 /**
  * uci_add_list: Append a string to an element list
  * @ctx: uci context
- * @package: package name
- * @section: section name
- * @option: option name
- * @value: string value
- * @result: store the updated element in this variable (optional)
+ * @ptr: uci pointer (with value)
  *
- * Note: if the given option already contains a string, convert it to an 1-element-list
- * before appending the next element
+ * Note: if the given option already contains a string value,
+ * it will be converted to an 1-element-list before appending the next element
  */
-extern int uci_add_list(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option, const char *value, struct uci_option **result);
+extern int uci_add_list(struct uci_context *ctx, struct uci_ptr *ptr);
 
 /**
- * uci_rename: Rename an element
+ * uci_reorder: Reposition a section
  * @ctx: uci context
- * @package: package name
- * @section: section name
- * @option: option name
- * @name: new name
+ * @s: uci section to reposition
+ * @pos: new position in the section list
  */
-extern int uci_rename(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *name);
+extern int uci_reorder_section(struct uci_context *ctx, struct uci_section *s, int pos);
 
 /**
- * uci_delete_element: Delete a section or option
+ * uci_rename: Rename an element
  * @ctx: uci context
- * @e: element (section or option)
+ * @ptr: uci pointer (with value)
  */
-extern int uci_delete_element(struct uci_context *ctx, struct uci_element *e);
+extern int uci_rename(struct uci_context *ctx, struct uci_ptr *ptr);
 
 /**
  * uci_delete: Delete a section or option
  * @ctx: uci context
- * @p: uci package
- * @section: section name
- * @option: option name (optional)
+ * @ptr: uci pointer
  */
-extern int uci_delete(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option);
+extern int uci_delete(struct uci_context *ctx, struct uci_ptr *ptr);
 
 /**
- * uci_save: save change history for a package
+ * uci_save: save change delta for a package
  * @ctx: uci context
  * @p: uci_package struct
  */
@@ -252,7 +218,7 @@ extern int uci_save(struct uci_context *ctx, struct uci_package *p);
  * uci_commit: commit changes to a package
  * @ctx: uci context
  * @p: uci_package struct pointer
- * @overwrite: overwrite existing config data and flush history
+ * @overwrite: overwrite existing config data and flush delta
  *
  * committing may reload the whole uci_package data,
  * the supplied pointer is updated accordingly
@@ -267,14 +233,14 @@ extern int uci_commit(struct uci_context *ctx, struct uci_package **p, bool over
  */
 extern int uci_list_configs(struct uci_context *ctx, char ***list);
 
-/** 
- * uci_set_savedir: override the default history save directory
+/**
+ * uci_set_savedir: override the default delta save directory
  * @ctx: uci context
  * @dir: directory name
  */
 extern int uci_set_savedir(struct uci_context *ctx, const char *dir);
 
-/** 
+/**
  * uci_set_savedir: override the default config storage directory
  * @ctx: uci context
  * @dir: directory name
@@ -282,23 +248,21 @@ extern int uci_set_savedir(struct uci_context *ctx, const char *dir);
 extern int uci_set_confdir(struct uci_context *ctx, const char *dir);
 
 /**
- * uci_add_history_path: add a directory to the search path for change history files
+ * uci_add_delta_path: add a directory to the search path for change delta files
  * @ctx: uci context
  * @dir: directory name
  *
  * This function allows you to add directories, which contain 'overlays'
  * for the active config, that will never be committed.
  */
-extern int uci_add_history_path(struct uci_context *ctx, const char *dir);
+extern int uci_add_delta_path(struct uci_context *ctx, const char *dir);
 
 /**
  * uci_revert: revert all changes to a config item
  * @ctx: uci context
- * @p: pointer to a uci_package struct ptr (will be replaced by the revert)
- * @section: section name (optional)
- * @option option name (optional)
+ * @ptr: uci pointer
  */
-extern int uci_revert(struct uci_context *ctx, struct uci_package **p, const char *section, const char *option);
+extern int uci_revert(struct uci_context *ctx, struct uci_ptr *ptr);
 
 /**
  * uci_parse_argument: parse a shell-style argument, with an arbitrary quoting style
@@ -327,16 +291,76 @@ extern int uci_set_backend(struct uci_context *ctx, const char *name);
  */
 extern bool uci_validate_text(const char *str);
 
+
+/**
+ * uci_add_hook: add a uci hook
+ * @ctx: uci context
+ * @ops: uci hook ops
+ *
+ * NB: allocated and freed by the caller
+ */
+extern int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
+
+/**
+ * uci_remove_hook: remove a uci hook
+ * @ctx: uci context
+ * @ops: uci hook ops
+ */
+extern int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops);
+
+/**
+ * uci_load_plugin: load an uci plugin
+ * @ctx: uci context
+ * @filename: path to the uci plugin
+ *
+ * NB: plugin will be unloaded automatically when the context is freed
+ */
+int uci_load_plugin(struct uci_context *ctx, const char *filename);
+
+/**
+ * uci_load_plugins: load all uci plugins from a directory
+ * @ctx: uci context
+ * @pattern: pattern of uci plugin files (optional)
+ *
+ * if pattern is NULL, then uci_load_plugins will call uci_load_plugin
+ * for uci_*.so in <prefix>/lib/
+ */
+int uci_load_plugins(struct uci_context *ctx, const char *pattern);
+
+/**
+ * uci_parse_ptr: parse a uci string into a uci_ptr
+ * @ctx: uci context
+ * @ptr: target data structure
+ * @str: string to parse
+ *
+ * str is modified by this function
+ */
+int uci_parse_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str);
+
+/**
+ * uci_lookup_next: lookup a child element
+ * @ctx: uci context
+ * @e: target element pointer
+ * @list: list of elements
+ * @name: name of the child element
+ *
+ * if parent is NULL, the function looks up the package with the given name
+ */
+int uci_lookup_next(struct uci_context *ctx, struct uci_element **e, struct uci_list *list, const char *name);
+
+
 /* UCI data structures */
 enum uci_type {
 	UCI_TYPE_UNSPEC = 0,
-	UCI_TYPE_HISTORY = 1,
+	UCI_TYPE_DELTA = 1,
 	UCI_TYPE_PACKAGE = 2,
 	UCI_TYPE_SECTION = 3,
 	UCI_TYPE_OPTION = 4,
 	UCI_TYPE_PATH = 5,
 	UCI_TYPE_BACKEND = 6,
 	UCI_TYPE_ITEM = 7,
+	UCI_TYPE_HOOK = 8,
+	UCI_TYPE_PLUGIN = 9,
 };
 
 enum uci_option_type {
@@ -348,7 +372,7 @@ enum uci_flags {
 	UCI_FLAG_STRICT =        (1 << 0), /* strict mode for the parser */
 	UCI_FLAG_PERROR =        (1 << 1), /* print parser error messages */
 	UCI_FLAG_EXPORT_NAME =   (1 << 2), /* when exporting, name unnamed sections */
-	UCI_FLAG_SAVED_HISTORY = (1 << 3), /* store the saved history in memory as well */
+	UCI_FLAG_SAVED_DELTA = (1 << 3), /* store the saved delta in memory as well */
 };
 
 struct uci_element
@@ -388,16 +412,19 @@ struct uci_context
 	char *confdir;
 	char *savedir;
 
-	/* search path for history files */
-	struct uci_list history_path;
+	/* search path for delta files */
+	struct uci_list delta_path;
 
 	/* private: */
 	int err;
 	const char *func;
 	jmp_buf trap;
-	bool internal;
+	bool internal, nested;
 	char *buf;
 	int bufsz;
+
+	struct uci_list hooks;
+	struct uci_list plugins;
 };
 
 struct uci_package
@@ -405,15 +432,15 @@ struct uci_package
 	struct uci_element e;
 	struct uci_list sections;
 	struct uci_context *ctx;
-	bool has_history;
+	bool has_delta;
 	char *path;
 
 	/* private: */
 	struct uci_backend *backend;
 	void *priv;
 	int n_section;
-	struct uci_list history;
-	struct uci_list saved_history;
+	struct uci_list delta;
+	struct uci_list saved_delta;
 };
 
 struct uci_section
@@ -441,10 +468,11 @@ enum uci_command {
 	UCI_CMD_REMOVE,
 	UCI_CMD_CHANGE,
 	UCI_CMD_RENAME,
+	UCI_CMD_REORDER,
 	UCI_CMD_LIST_ADD,
 };
 
-struct uci_history
+struct uci_delta
 {
 	struct uci_element e;
 	enum uci_command cmd;
@@ -464,11 +492,37 @@ struct uci_ptr
 	struct uci_package *p;
 	struct uci_section *s;
 	struct uci_option *o;
+	struct uci_element *last;
 
-	char *package;
-	char *section;
-	char *option;
-	char *value;
+	const char *package;
+	const char *section;
+	const char *option;
+	const char *value;
+};
+
+struct uci_hook_ops
+{
+	void (*load)(const struct uci_hook_ops *ops, struct uci_package *p);
+	void (*set)(const struct uci_hook_ops *ops, struct uci_package *p, struct uci_delta *e);
+};
+
+struct uci_hook
+{
+	struct uci_element e;
+	const struct uci_hook_ops *ops;
+};
+
+struct uci_plugin_ops
+{
+	int (*attach)(struct uci_context *ctx);
+	void (*detach)(struct uci_context *ctx);
+};
+
+struct uci_plugin
+{
+	struct uci_element e;
+	const struct uci_plugin_ops *ops;
+	void *dlh;
 };
 
 
@@ -483,8 +537,10 @@ struct uci_ptr
  * @type:   the type of the container struct this is embedded in.
  * @member: the name of the member within the struct.
  */
+#ifndef container_of
 #define container_of(ptr, type, member) \
 	((type *) ((char *)ptr - offsetof(type,member)))
+#endif
 
 
 /**
@@ -535,19 +591,23 @@ struct uci_ptr
 
 /* wrappers for dynamic type handling */
 #define uci_type_backend UCI_TYPE_BACKEND
-#define uci_type_history UCI_TYPE_HISTORY
+#define uci_type_delta UCI_TYPE_DELTA
 #define uci_type_package UCI_TYPE_PACKAGE
 #define uci_type_section UCI_TYPE_SECTION
 #define uci_type_option UCI_TYPE_OPTION
+#define uci_type_hook UCI_TYPE_HOOK
+#define uci_type_plugin UCI_TYPE_PLUGIN
 
 /* element typecasting */
 #ifdef UCI_DEBUG_TYPECAST
 static const char *uci_typestr[] = {
 	[uci_type_backend] = "backend",
-	[uci_type_history] = "history",
+	[uci_type_delta] = "delta",
 	[uci_type_package] = "package",
 	[uci_type_section] = "section",
 	[uci_type_option] = "option",
+	[uci_type_hook] = "hook",
+	[uci_type_plugin] = "plugin",
 };
 
 static void uci_typecast_error(int from, int to)
@@ -565,17 +625,21 @@ static void uci_typecast_error(int from, int to)
 	}
 
 BUILD_CAST(backend)
-BUILD_CAST(history)
+BUILD_CAST(delta)
 BUILD_CAST(package)
 BUILD_CAST(section)
 BUILD_CAST(option)
+BUILD_CAST(hook)
+BUILD_CAST(plugin)
 
 #else
 #define uci_to_backend(ptr) container_of(ptr, struct uci_backend, e)
-#define uci_to_history(ptr) container_of(ptr, struct uci_history, e)
+#define uci_to_delta(ptr) container_of(ptr, struct uci_delta, e)
 #define uci_to_package(ptr) container_of(ptr, struct uci_package, e)
 #define uci_to_section(ptr) container_of(ptr, struct uci_section, e)
 #define uci_to_option(ptr)  container_of(ptr, struct uci_option, e)
+#define uci_to_hook(ptr)    container_of(ptr, struct uci_hook, e)
+#define uci_to_plugin(ptr)  container_of(ptr, struct uci_plugin, e)
 #endif
 
 /**
@@ -591,4 +655,67 @@ BUILD_CAST(option)
 #define uci_dataptr(ptr) \
 	(((char *) ptr) + sizeof(*ptr))
 
+/**
+ * uci_lookup_package: look up a package
+ * @ctx: uci context
+ * @name: name of the package
+ */
+static inline struct uci_package *
+uci_lookup_package(struct uci_context *ctx, const char *name)
+{
+	struct uci_element *e = NULL;
+	if (uci_lookup_next(ctx, &e, &ctx->root, name) == 0)
+		return uci_to_package(e);
+	else
+		return NULL;
+}
+
+/**
+ * uci_lookup_section: look up a section
+ * @ctx: uci context
+ * @p: package that the section belongs to
+ * @name: name of the section
+ */
+static inline struct uci_section *
+uci_lookup_section(struct uci_context *ctx, struct uci_package *p, const char *name)
+{
+	struct uci_element *e = NULL;
+	if (uci_lookup_next(ctx, &e, &p->sections, name) == 0)
+		return uci_to_section(e);
+	else
+		return NULL;
+}
+
+/**
+ * uci_lookup_option: look up an option
+ * @ctx: uci context
+ * @section: section that the option belongs to
+ * @name: name of the option
+ */
+static inline struct uci_option *
+uci_lookup_option(struct uci_context *ctx, struct uci_section *s, const char *name)
+{
+	struct uci_element *e = NULL;
+	if (uci_lookup_next(ctx, &e, &s->options, name) == 0)
+		return uci_to_option(e);
+	else
+		return NULL;
+}
+
+static inline const char *
+uci_lookup_option_string(struct uci_context *ctx, struct uci_section *s, const char *name)
+{
+	struct uci_option *o;
+
+	o = uci_lookup_option(ctx, s, name);
+	if (!o || o->type != UCI_TYPE_STRING)
+		return NULL;
+
+	return o->v.string;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif