X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=libuci.c;h=5b5db54718a5bb6dc20fc52ade8404397aa6a9f3;hp=ccf29b7ca708f5d143bff88ca457acae90ed518a;hb=f1ae2ddc4ff16e541c46f595073bf277cd8f778a;hpb=a652efc7675db8b2c0571899609b42e539162141

diff --git a/libuci.c b/libuci.c
index ccf29b7..5b5db54 100644
--- a/libuci.c
+++ b/libuci.c
@@ -16,142 +16,242 @@
  * This file contains some common code for the uci library
  */
 
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <stdbool.h>
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include "uci.h"
 
-#include "libuci.h"
+static const char *uci_confdir = UCI_CONFDIR;
+static const char *uci_savedir = UCI_SAVEDIR;
 
-#define DEBUG
+static const char *uci_errstr[] = {
+	[UCI_OK] =            "Success",
+	[UCI_ERR_MEM] =       "Out of memory",
+	[UCI_ERR_INVAL] =     "Invalid argument",
+	[UCI_ERR_NOTFOUND] =  "Entry not found",
+	[UCI_ERR_IO] =        "I/O error",
+	[UCI_ERR_PARSE] =     "Parse error",
+	[UCI_ERR_DUPLICATE] = "Duplicate entry",
+	[UCI_ERR_UNKNOWN] =   "Unknown error",
+};
 
-#ifdef DEBUG
-#define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
-#else
-#define DPRINTF(...)
-#endif
-/* 
- * throw an uci exception and store the error number
- * in the context.
- */
-#define UCI_THROW(ctx, err) do { 	\
-	longjmp(ctx->trap, err); 	\
-} while (0)
+static void uci_cleanup(struct uci_context *ctx);
 
-/*
- * store the return address for handling exceptions
- * needs to be called in every externally visible library function
- *
- * NB: this does not handle recursion at all. Calling externally visible
- * functions from other uci functions is only allowed at the end of the
- * calling function.
- */
-#define UCI_HANDLE_ERR(ctx) do { 		\
-	int __val;			\
-	if (!ctx)			\
-		return UCI_ERR_INVAL;	\
-	__val = setjmp(ctx->trap);	\
-	if (__val) {			\
-		ctx->errno = __val;	\
-		return __val;		\
-	}				\
-} while (0)
+#include "uci_internal.h"
+#include "util.c"
+#include "list.c"
+#include "history.c"
+#include "file.c"
 
-/*
- * check the specified condition.
- * throw an invalid argument exception if it's false
- */
-#define UCI_ASSERT(ctx, expr) do {	\
-	if (!(expr)) {			\
-		DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
-		UCI_THROW(ctx, UCI_ERR_INVAL);	\
-	}				\
-} while (0)
-
-
-static char *uci_errstr[] = {
-	[UCI_OK] =           "Success",
-	[UCI_ERR_MEM] =      "Out of memory",
-	[UCI_ERR_INVAL] =    "Invalid argument",
-	[UCI_ERR_NOTFOUND] = "Entry not found",
-	[UCI_ERR_PARSE] =    "Parse error",
-	[UCI_ERR_UNKNOWN] =  "Unknown error",
-};
+/* exported functions */
+struct uci_context *uci_alloc_context(void)
+{
+	struct uci_context *ctx;
 
+	ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
+	memset(ctx, 0, sizeof(struct uci_context));
+	uci_list_init(&ctx->root);
+	uci_list_init(&ctx->history_path);
+	uci_list_init(&ctx->backends);
+	ctx->flags = UCI_FLAG_STRICT;
 
-/*
- * UCI wrapper for malloc, which uses exception handling
- */
-static void *uci_malloc(struct uci_context *ctx, size_t size)
-{
-	void *ptr;
-	
-	ptr = malloc(size);
-	if (!ptr)
-		UCI_THROW(ctx, UCI_ERR_MEM);
-	memset(ptr, 0, size);
-
-	return ptr;
-}
+	ctx->confdir = (char *) uci_confdir;
+	ctx->savedir = (char *) uci_savedir;
 
-/*
- * UCI wrapper for realloc, which uses exception handling
- */
-static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
-{
-	ptr = realloc(ptr, size);
-	if (!ptr)
-		UCI_THROW(ctx, UCI_ERR_MEM);
+	uci_list_add(&ctx->backends, &uci_file_backend.e.list);
+	ctx->backend = &uci_file_backend;
 
-	return ptr;
+	return ctx;
 }
 
-#include "hash.c"
-#include "parse.c"
+void uci_free_context(struct uci_context *ctx)
+{
+	struct uci_element *e, *tmp;
+
+	if (ctx->confdir != uci_confdir)
+		free(ctx->confdir);
+	if (ctx->savedir != uci_savedir)
+		free(ctx->savedir);
 
-/* externally visible functions */
+	uci_cleanup(ctx);
+	UCI_TRAP_SAVE(ctx, ignore);
+	uci_foreach_element_safe(&ctx->root, tmp, e) {
+		struct uci_package *p = uci_to_package(e);
+		uci_free_package(&p);
+	}
+	uci_foreach_element_safe(&ctx->history_path, tmp, e) {
+		uci_free_element(e);
+	}
+	free(ctx);
+	UCI_TRAP_RESTORE(ctx);
 
-struct uci_context *uci_alloc(void)
-{
-	struct uci_context *ctx;
-	
-	ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
-	memset(ctx, 0, sizeof(struct uci_context));
-	
-	return ctx;
+ignore:
+	return;
 }
 
-int uci_cleanup(struct uci_context *ctx)
+int uci_set_confdir(struct uci_context *ctx, const char *dir)
 {
+	char *cdir;
+
 	UCI_HANDLE_ERR(ctx);
-	uci_parse_cleanup(ctx);
+	UCI_ASSERT(ctx, dir != NULL);
+
+	cdir = uci_strdup(ctx, dir);
+	if (ctx->confdir != uci_confdir)
+		free(ctx->confdir);
+	ctx->confdir = cdir;
 	return 0;
 }
 
-void uci_perror(struct uci_context *ctx, const char *str)
+static void uci_cleanup(struct uci_context *ctx)
+{
+	struct uci_parse_context *pctx;
+
+	if (ctx->buf) {
+		free(ctx->buf);
+		ctx->buf = NULL;
+		ctx->bufsz = 0;
+	}
+
+	pctx = ctx->pctx;
+	if (!pctx)
+		return;
+
+	ctx->pctx = NULL;
+	if (pctx->package)
+		uci_free_package(&pctx->package);
+
+	if (pctx->buf)
+		free(pctx->buf);
+
+	free(pctx);
+}
+
+void uci_perror(struct uci_context *ctx, const char *prefix)
 {
 	int err;
 
 	if (!ctx)
 		err = UCI_ERR_INVAL;
 	else
-		err = ctx->errno;
-	
+		err = ctx->err;
+
 	if ((err < 0) || (err >= UCI_ERR_LAST))
 		err = UCI_ERR_UNKNOWN;
 
+	if (prefix)
+		fprintf(stderr, "%s: ", prefix);
+	if (ctx->func)
+		fprintf(stderr, "%s: ", ctx->func);
+
 	switch (err) {
 	case UCI_ERR_PARSE:
 		if (ctx->pctx) {
-			fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
+			fprintf(stderr, "%s (%s) at line %d, byte %d\n", uci_errstr[err], (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
 			break;
 		}
 		/* fall through */
 	default:
-		fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
+		fprintf(stderr, "%s\n", uci_errstr[err]);
 		break;
 	}
 }
 
+int uci_list_configs(struct uci_context *ctx, char ***list)
+{
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, list != NULL);
+	UCI_ASSERT(ctx, ctx->backend && ctx->backend->list_configs);
+	*list = ctx->backend->list_configs(ctx);
+	return 0;
+}
+
+int uci_commit(struct uci_context *ctx, struct uci_package **package, bool overwrite)
+{
+	struct uci_package *p;
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, package != NULL);
+	p = *package;
+	UCI_ASSERT(ctx, p != NULL);
+	UCI_ASSERT(ctx, p->backend && p->backend->commit);
+	p->backend->commit(ctx, package, overwrite);
+	return 0;
+}
+
+int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
+{
+	struct uci_package *p;
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, ctx->backend && ctx->backend->load);
+	p = ctx->backend->load(ctx, name);
+	if (package)
+		*package = p;
+
+	return 0;
+}
+
+#ifdef UCI_PLUGIN_SUPPORT
+
+__plugin int uci_add_backend(struct uci_context *ctx, struct uci_backend *b)
+{
+	struct uci_element *e;
+	UCI_HANDLE_ERR(ctx);
+
+	e = uci_lookup_list(&ctx->backends, b->e.name);
+	if (e)
+		UCI_THROW(ctx, UCI_ERR_DUPLICATE);
+
+	e = uci_malloc(ctx, sizeof(struct uci_backend));
+	memcpy(e, b, sizeof(struct uci_backend));
+
+	uci_list_add(&ctx->backends, &e->list);
+	return 0;
+}
+
+__plugin int uci_del_backend(struct uci_context *ctx, struct uci_backend *b)
+{
+	struct uci_element *e, *tmp;
+
+	UCI_HANDLE_ERR(ctx);
+
+	e = uci_lookup_list(&ctx->backends, b->e.name);
+	if (!e || uci_to_backend(e)->ptr != b->ptr)
+		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+	b = uci_to_backend(e);
+
+	if (ctx->backend && ctx->backend->ptr == b->ptr)
+		ctx->backend = &uci_file_backend;
+
+	uci_foreach_element_safe(&ctx->root, tmp, e) {
+		struct uci_package *p = uci_to_package(e);
+
+		if (!p->backend)
+			continue;
+
+		if (p->backend->ptr == b->ptr)
+			UCI_INTERNAL(uci_unload, ctx, p);
+	}
+
+	uci_list_del(&b->e.list);
+	free(b);
+
+	return 0;
+}
+
+#endif
 
+int uci_set_backend(struct uci_context *ctx, const char *name)
+{
+	struct uci_element *e;
+
+	UCI_HANDLE_ERR(ctx);
+	UCI_ASSERT(ctx, name != NULL);
+	e = uci_lookup_list(&ctx->backends, name);
+	if (!e)
+		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+	ctx->backend = uci_to_backend(e);
+	return 0;
+}