2 * libuci - Library for the Unified Configuration Interface
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #ifndef __UCI_INTERNAL_H
16 #define __UCI_INTERNAL_H
18 struct uci_parse_context
26 struct uci_package *package;
27 struct uci_section *section;
35 int uci_add_backend(struct uci_context *ctx, struct uci_backend *b);
36 void uci_add_history(struct uci_context *ctx, struct uci_list *list, int cmd, char *section, char *option, char *value);
37 void uci_free_history(struct uci_history *h);
40 * functions for debug and error handling, for internal use only
44 #define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
50 * throw an uci exception and store the error number
53 #define UCI_THROW(ctx, err) do { \
54 DPRINTF("Exception: %s in %s, %s:%d\n", #err, __func__, __FILE__, __LINE__); \
55 longjmp(ctx->trap, err); \
59 * store the return address for handling exceptions
60 * needs to be called in every externally visible library function
62 * NB: this does not handle recursion at all. Calling externally visible
63 * functions from other uci functions is only allowed at the end of the
64 * calling function, or by wrapping the function call in UCI_TRAP_SAVE
65 * and UCI_TRAP_RESTORE.
67 #define UCI_HANDLE_ERR(ctx) do { \
68 DPRINTF("ENTER: %s\n", __func__); \
72 return UCI_ERR_INVAL; \
74 __val = setjmp(ctx->trap); \
75 ctx->internal = false; \
77 DPRINTF("LEAVE: %s, ret=%d\n", __func__, __val); \
84 * In a block enclosed by UCI_TRAP_SAVE and UCI_TRAP_RESTORE, all exceptions
85 * are intercepted and redirected to the label specified in 'handler'
86 * after UCI_TRAP_RESTORE, or when reaching the 'handler' label, the old
87 * exception handler is restored
89 #define UCI_TRAP_SAVE(ctx, handler) do { \
92 memcpy(__old_trap, ctx->trap, sizeof(ctx->trap)); \
93 __val = setjmp(ctx->trap); \
96 memcpy(ctx->trap, __old_trap, sizeof(ctx->trap)); \
99 #define UCI_TRAP_RESTORE(ctx) \
100 memcpy(ctx->trap, __old_trap, sizeof(ctx->trap)); \
104 * UCI_INTERNAL: Do an internal call of a public API function
106 * Sets Exception handling to passthrough mode.
107 * Allows API functions to change behavior compared to public use
109 #define UCI_INTERNAL(func, ctx, ...) do { \
110 ctx->internal = true; \
111 func(ctx, __VA_ARGS__); \
115 * check the specified condition.
116 * throw an invalid argument exception if it's false
118 #define UCI_ASSERT(ctx, expr) do { \
120 DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
121 UCI_THROW(ctx, UCI_ERR_INVAL); \