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>
30 #define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
35 * throw an uci exception and store the error number
38 #define UCI_THROW(ctx, err) do { \
39 longjmp(ctx->trap, err); \
43 * store the return address for handling exceptions
44 * needs to be called in every externally visible library function
46 * NB: this does not handle recursion at all. Calling externally visible
47 * functions from other uci functions is only allowed at the end of the
50 #define UCI_HANDLE_ERR(ctx) do { \
53 return UCI_ERR_INVAL; \
54 __val = setjmp(ctx->trap); \
62 * check the specified condition.
63 * throw an invalid argument exception if it's false
65 #define UCI_ASSERT(ctx, expr) do { \
67 DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
68 UCI_THROW(ctx, UCI_ERR_INVAL); \
73 static char *uci_errstr[] = {
75 [UCI_ERR_MEM] = "Out of memory",
76 [UCI_ERR_INVAL] = "Invalid argument",
77 [UCI_ERR_NOTFOUND] = "Entry not found",
78 [UCI_ERR_PARSE] = "Parse error",
79 [UCI_ERR_UNKNOWN] = "Unknown error",
84 * UCI wrapper for malloc, which uses exception handling
86 static void *uci_malloc(struct uci_context *ctx, size_t size)
92 UCI_THROW(ctx, UCI_ERR_MEM);
99 * UCI wrapper for realloc, which uses exception handling
101 static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
103 ptr = realloc(ptr, size);
105 UCI_THROW(ctx, UCI_ERR_MEM);
113 /* externally visible functions */
115 struct uci_context *uci_alloc(void)
117 struct uci_context *ctx;
119 ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
120 memset(ctx, 0, sizeof(struct uci_context));
125 int uci_cleanup(struct uci_context *ctx)
128 uci_parse_cleanup(ctx);
132 void uci_perror(struct uci_context *ctx, const char *str)
141 if ((err < 0) || (err >= UCI_ERR_LAST))
142 err = UCI_ERR_UNKNOWN;
147 fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
152 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);