major code refactoring for more code reuse and smaller code size
[project/uci.git] / libuci.c
1 /*
2 * libuci - Library for the Unified Configuration Interface
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
4 *
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
8 *
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.
13 */
14
15 /*
16 * This file contains some common code for the uci library
17 */
18
19 #include <sys/types.h>
20 #include <stdbool.h>
21 #include <string.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include "uci.h"
25
26 #define DEBUG
27 #include "err.h"
28
29 static const char *uci_errstr[] = {
30 [UCI_OK] = "Success",
31 [UCI_ERR_MEM] = "Out of memory",
32 [UCI_ERR_INVAL] = "Invalid argument",
33 [UCI_ERR_NOTFOUND] = "Entry not found",
34 [UCI_ERR_IO] = "I/O error",
35 [UCI_ERR_PARSE] = "Parse error",
36 [UCI_ERR_UNKNOWN] = "Unknown error",
37 };
38
39
40 /*
41 * UCI wrapper for malloc, which uses exception handling
42 */
43 static void *uci_malloc(struct uci_context *ctx, size_t size)
44 {
45 void *ptr;
46
47 ptr = malloc(size);
48 if (!ptr)
49 UCI_THROW(ctx, UCI_ERR_MEM);
50 memset(ptr, 0, size);
51
52 return ptr;
53 }
54
55 /*
56 * UCI wrapper for realloc, which uses exception handling
57 */
58 static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
59 {
60 ptr = realloc(ptr, size);
61 if (!ptr)
62 UCI_THROW(ctx, UCI_ERR_MEM);
63
64 return ptr;
65 }
66
67 /*
68 * UCI wrapper for strdup, which uses exception handling
69 */
70 static char *uci_strdup(struct uci_context *ctx, const char *str)
71 {
72 char *ptr;
73
74 ptr = strdup(str);
75 if (!ptr)
76 UCI_THROW(ctx, UCI_ERR_MEM);
77
78 return ptr;
79 }
80
81 #include "list.c"
82 #include "file.c"
83
84 /* externally visible functions */
85
86 struct uci_context *uci_alloc(void)
87 {
88 struct uci_context *ctx;
89
90 ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
91 memset(ctx, 0, sizeof(struct uci_context));
92 uci_list_init(&ctx->root);
93
94 return ctx;
95 }
96
97 void uci_free(struct uci_context *ctx)
98 {
99 struct uci_element *e, *tmp;
100
101 uci_cleanup(ctx);
102 uci_foreach_element_safe(&ctx->root, tmp, e) {
103 uci_free_package(uci_to_package(e));
104 }
105 free(ctx);
106 return;
107 }
108
109 int uci_cleanup(struct uci_context *ctx)
110 {
111 UCI_HANDLE_ERR(ctx);
112 uci_file_cleanup(ctx);
113 return 0;
114 }
115
116 void uci_perror(struct uci_context *ctx, const char *str)
117 {
118 int err;
119
120 if (!ctx)
121 err = UCI_ERR_INVAL;
122 else
123 err = ctx->errno;
124
125 if ((err < 0) || (err >= UCI_ERR_LAST))
126 err = UCI_ERR_UNKNOWN;
127
128 switch (err) {
129 case UCI_ERR_PARSE:
130 if (ctx->pctx) {
131 fprintf(stderr, "%s: %s (%s) at line %d, byte %d\n", str, uci_errstr[err], (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
132 break;
133 }
134 /* fall through */
135 default:
136 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
137 break;
138 }
139 }
140
141