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 <assert.h>
28 #include <errno.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.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) { yyin = fd; } /* void yyset_in */
43 static oconfig_item_t *oconfig_parse_fh(FILE *fh) {
44 int status;
45 oconfig_item_t *ret;
47 char file[10];
49 yyset_in(fh);
51 if (NULL == c_file) {
52 status = snprintf(file, sizeof(file), "<fd#%d>", fileno(fh));
54 if ((status < 0) || (((size_t)status) >= sizeof(file))) {
55 c_file = "<unknown>";
56 } else {
57 file[sizeof(file) - 1] = '\0';
58 c_file = file;
59 }
60 }
62 status = yyparse();
63 if (status != 0) {
64 fprintf(stderr, "yyparse returned error #%i\n", status);
65 return (NULL);
66 }
68 c_file = NULL;
70 ret = ci_root;
71 ci_root = NULL;
72 yyset_in((FILE *)0);
74 return (ret);
75 } /* oconfig_item_t *oconfig_parse_fh */
77 oconfig_item_t *oconfig_parse_file(const char *file) {
78 FILE *fh;
79 oconfig_item_t *ret;
81 c_file = file;
83 fh = fopen(file, "r");
84 if (fh == NULL) {
85 fprintf(stderr, "fopen (%s) failed: %s\n", file, strerror(errno));
86 return (NULL);
87 }
89 ret = oconfig_parse_fh(fh);
90 fclose(fh);
92 c_file = NULL;
94 return (ret);
95 } /* oconfig_item_t *oconfig_parse_file */
97 oconfig_item_t *oconfig_clone(const oconfig_item_t *ci_orig) {
98 oconfig_item_t *ci_copy;
100 ci_copy = calloc(1, sizeof(*ci_copy));
101 if (ci_copy == NULL) {
102 fprintf(stderr, "calloc failed.\n");
103 return (NULL);
104 }
105 ci_copy->values = NULL;
106 ci_copy->parent = NULL;
107 ci_copy->children = NULL;
109 ci_copy->key = strdup(ci_orig->key);
110 if (ci_copy->key == NULL) {
111 fprintf(stderr, "strdup failed.\n");
112 free(ci_copy);
113 return (NULL);
114 }
116 if (ci_orig->values_num > 0) /* {{{ */
117 {
118 ci_copy->values = (oconfig_value_t *)calloc((size_t)ci_orig->values_num,
119 sizeof(*ci_copy->values));
120 if (ci_copy->values == NULL) {
121 fprintf(stderr, "calloc failed.\n");
122 free(ci_copy->key);
123 free(ci_copy);
124 return (NULL);
125 }
126 ci_copy->values_num = ci_orig->values_num;
128 for (int i = 0; i < ci_copy->values_num; i++) {
129 ci_copy->values[i].type = ci_orig->values[i].type;
130 if (ci_copy->values[i].type == OCONFIG_TYPE_STRING) {
131 ci_copy->values[i].value.string =
132 strdup(ci_orig->values[i].value.string);
133 if (ci_copy->values[i].value.string == NULL) {
134 fprintf(stderr, "strdup failed.\n");
135 oconfig_free(ci_copy);
136 return (NULL);
137 }
138 } else /* ci_copy->values[i].type != OCONFIG_TYPE_STRING) */
139 {
140 ci_copy->values[i].value = ci_orig->values[i].value;
141 }
142 }
143 } /* }}} if (ci_orig->values_num > 0) */
145 if (ci_orig->children_num > 0) /* {{{ */
146 {
147 ci_copy->children = (oconfig_item_t *)calloc((size_t)ci_orig->children_num,
148 sizeof(*ci_copy->children));
149 if (ci_copy->children == NULL) {
150 fprintf(stderr, "calloc failed.\n");
151 oconfig_free(ci_copy);
152 return (NULL);
153 }
154 ci_copy->children_num = ci_orig->children_num;
156 for (int i = 0; i < ci_copy->children_num; i++) {
157 oconfig_item_t *child;
159 child = oconfig_clone(ci_orig->children + i);
160 if (child == NULL) {
161 oconfig_free(ci_copy);
162 return (NULL);
163 }
164 child->parent = ci_copy;
165 ci_copy->children[i] = *child;
166 free(child);
167 } /* for (i = 0; i < ci_copy->children_num; i++) */
168 } /* }}} if (ci_orig->children_num > 0) */
170 return (ci_copy);
171 } /* oconfig_item_t *oconfig_clone */
173 static void oconfig_free_all(oconfig_item_t *ci) {
174 if (ci == NULL)
175 return;
177 if (ci->key != NULL)
178 free(ci->key);
180 for (int i = 0; i < ci->values_num; i++)
181 if ((ci->values[i].type == OCONFIG_TYPE_STRING) &&
182 (NULL != ci->values[i].value.string))
183 free(ci->values[i].value.string);
185 if (ci->values != NULL)
186 free(ci->values);
188 for (int i = 0; i < ci->children_num; i++)
189 oconfig_free_all(ci->children + i);
191 if (ci->children != NULL)
192 free(ci->children);
193 }
195 void oconfig_free(oconfig_item_t *ci) {
196 oconfig_free_all(ci);
197 free(ci);
198 }