1 /**
2 * collectd - src/liboconfig/oconfig.c
3 * Copyright (C) 2006,2007 Florian Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian Forster <octo at collectd.org>
25 **/
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <string.h>
30 #include <assert.h>
31 #include <errno.h>
33 #include "oconfig.h"
35 extern FILE *yyin;
36 extern int yyparse (void);
38 oconfig_item_t *ci_root;
39 const char *c_file;
41 static void yyset_in (FILE *fd)
42 {
43 yyin = fd;
44 } /* void yyset_in */
46 oconfig_item_t *oconfig_parse_fh (FILE *fh)
47 {
48 int status;
49 oconfig_item_t *ret;
51 char file[10];
53 yyset_in (fh);
55 if (NULL == c_file) {
56 status = snprintf (file, sizeof (file), "<fd#%d>", fileno (fh));
58 if ((status < 0) || (((size_t) status) >= sizeof (file))) {
59 c_file = "<unknown>";
60 }
61 else {
62 file[sizeof (file) - 1] = '\0';
63 c_file = file;
64 }
65 }
67 status = yyparse ();
68 if (status != 0)
69 {
70 fprintf (stderr, "yyparse returned error #%i\n", status);
71 return (NULL);
72 }
74 c_file = NULL;
76 ret = ci_root;
77 ci_root = NULL;
78 yyset_in ((FILE *) 0);
80 return (ret);
81 } /* oconfig_item_t *oconfig_parse_fh */
83 oconfig_item_t *oconfig_parse_file (const char *file)
84 {
85 FILE *fh;
86 oconfig_item_t *ret;
88 c_file = file;
90 fh = fopen (file, "r");
91 if (fh == NULL)
92 {
93 fprintf (stderr, "fopen (%s) failed: %s\n", file, strerror (errno));
94 return (NULL);
95 }
97 ret = oconfig_parse_fh (fh);
98 fclose (fh);
100 c_file = NULL;
102 return (ret);
103 } /* oconfig_item_t *oconfig_parse_file */
105 oconfig_item_t *oconfig_clone (const oconfig_item_t *ci_orig)
106 {
107 oconfig_item_t *ci_copy;
109 ci_copy = calloc (1, sizeof (*ci_copy));
110 if (ci_copy == NULL)
111 {
112 fprintf (stderr, "calloc failed.\n");
113 return (NULL);
114 }
115 ci_copy->values = NULL;
116 ci_copy->parent = NULL;
117 ci_copy->children = NULL;
119 ci_copy->key = strdup (ci_orig->key);
120 if (ci_copy->key == NULL)
121 {
122 fprintf (stderr, "strdup failed.\n");
123 free (ci_copy);
124 return (NULL);
125 }
127 if (ci_orig->values_num > 0) /* {{{ */
128 {
129 int i;
131 ci_copy->values = (oconfig_value_t *) calloc ((size_t) ci_orig->values_num,
132 sizeof (*ci_copy->values));
133 if (ci_copy->values == NULL)
134 {
135 fprintf (stderr, "calloc failed.\n");
136 free (ci_copy->key);
137 free (ci_copy);
138 return (NULL);
139 }
140 ci_copy->values_num = ci_orig->values_num;
142 for (i = 0; i < ci_copy->values_num; i++)
143 {
144 ci_copy->values[i].type = ci_orig->values[i].type;
145 if (ci_copy->values[i].type == OCONFIG_TYPE_STRING)
146 {
147 ci_copy->values[i].value.string = strdup (ci_orig->values[i].value.string);
148 if (ci_copy->values[i].value.string == NULL)
149 {
150 fprintf (stderr, "strdup failed.\n");
151 oconfig_free (ci_copy);
152 return (NULL);
153 }
154 }
155 else /* ci_copy->values[i].type != OCONFIG_TYPE_STRING) */
156 {
157 ci_copy->values[i].value = ci_orig->values[i].value;
158 }
159 }
160 } /* }}} if (ci_orig->values_num > 0) */
162 if (ci_orig->children_num > 0) /* {{{ */
163 {
164 int i;
166 ci_copy->children = (oconfig_item_t *) calloc ((size_t) ci_orig->children_num,
167 sizeof (*ci_copy->children));
168 if (ci_copy->children == NULL)
169 {
170 fprintf (stderr, "calloc failed.\n");
171 oconfig_free (ci_copy);
172 return (NULL);
173 }
174 ci_copy->children_num = ci_orig->children_num;
176 for (i = 0; i < ci_copy->children_num; i++)
177 {
178 oconfig_item_t *child;
180 child = oconfig_clone (ci_orig->children + i);
181 if (child == NULL)
182 {
183 oconfig_free (ci_copy);
184 return (NULL);
185 }
186 child->parent = ci_copy;
187 ci_copy->children[i] = *child;
188 free (child);
189 } /* for (i = 0; i < ci_copy->children_num; i++) */
190 } /* }}} if (ci_orig->children_num > 0) */
192 return (ci_copy);
193 } /* oconfig_item_t *oconfig_clone */
195 static void oconfig_free_all (oconfig_item_t *ci)
196 {
197 int i;
199 if (ci == NULL)
200 return;
202 if (ci->key != NULL)
203 free (ci->key);
205 for (i = 0; i < ci->values_num; i++)
206 if ((ci->values[i].type == OCONFIG_TYPE_STRING)
207 && (NULL != ci->values[i].value.string))
208 free (ci->values[i].value.string);
210 if (ci->values != NULL)
211 free (ci->values);
213 for (i = 0; i < ci->children_num; i++)
214 oconfig_free_all (ci->children + i);
216 if (ci->children != NULL)
217 free (ci->children);
218 }
220 void oconfig_free (oconfig_item_t *ci)
221 {
222 oconfig_free_all (ci);
223 free (ci);
224 }
226 /*
227 * vim:shiftwidth=2:tabstop=8:softtabstop=2:fdm=marker
228 */