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.
16 * This file contains some common code for the uci library
19 #include <sys/types.h>
28 #define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
33 * throw an uci exception and store the error number
36 #define UCI_THROW(ctx, err) do { \
37 longjmp(ctx->trap, err); \
41 * store the return address for handling exceptions
42 * needs to be called in every externally visible library function
44 * NB: this does not handle recursion at all. Calling externally visible
45 * functions from other uci functions is only allowed at the end of the
48 #define UCI_HANDLE_ERR(ctx) do { \
51 return UCI_ERR_INVAL; \
52 __val = setjmp(ctx->trap); \
60 * check the specified condition.
61 * throw an invalid argument exception if it's false
63 #define UCI_ASSERT(ctx, expr) do { \
65 DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
66 UCI_THROW(ctx, UCI_ERR_INVAL); \
71 static char *uci_errstr[] = {
73 [UCI_ERR_MEM] = "Out of memory",
74 [UCI_ERR_INVAL] = "Invalid argument",
75 [UCI_ERR_NOTFOUND] = "Entry not found",
76 [UCI_ERR_PARSE] = "Parse error",
77 [UCI_ERR_UNKNOWN] = "Unknown error",
82 * UCI wrapper for malloc, which uses exception handling
84 static void *uci_malloc(struct uci_context *ctx, size_t size)
90 UCI_THROW(ctx, UCI_ERR_MEM);
97 * UCI wrapper for realloc, which uses exception handling
99 static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
101 ptr = realloc(ptr, size);
103 UCI_THROW(ctx, UCI_ERR_MEM);
111 /* externally visible functions */
113 struct uci_context *uci_alloc(void)
115 struct uci_context *ctx;
117 ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
118 memset(ctx, 0, sizeof(struct uci_context));
123 int uci_cleanup(struct uci_context *ctx)
126 uci_parse_cleanup(ctx);
130 void uci_perror(struct uci_context *ctx, const char *str)
139 if ((err < 0) || (err >= UCI_ERR_LAST))
140 err = UCI_ERR_UNKNOWN;
145 fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
150 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);