1 /*
2 * Copyright (c) 2004, 2008, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <string.h>
27 #include <stdlib.h>
28
29 #include "jni.h"
30 #include "manifest_info.h"
31 #include "JarFacade.h"
32
33 typedef struct {
34 jarAttribute* head;
35 jarAttribute* tail;
36 } iterationContext;
37
38 static void
doAttribute(const char * name,const char * value,void * user_data)39 doAttribute(const char* name, const char* value, void* user_data) {
40 iterationContext* context = (iterationContext*) user_data;
41
42 jarAttribute* attribute = (jarAttribute*)malloc(sizeof(jarAttribute));
43 if (attribute != NULL) {
44 attribute->name = strdup(name);
45 if (attribute->name == NULL) {
46 free(attribute);
47 } else {
48 char *begin = (char *)value;
49 char *end;
50 size_t value_len;
51
52 /* skip any leading white space */
53 while (*begin == ' ') {
54 begin++;
55 }
56
57 /* skip any trailing white space */
58 end = &begin[strlen(begin)];
59 while (end > begin && end[-1] == ' ') {
60 end--;
61 }
62
63 if (begin == end) {
64 /* no value so skip this attribute */
65 free(attribute->name);
66 free(attribute);
67 return;
68 }
69
70 value_len = (size_t)(end - begin);
71 attribute->value = malloc(value_len + 1);
72 if (attribute->value == NULL) {
73 free(attribute->name);
74 free(attribute);
75 } else {
76 /* save the value without leading or trailing whitespace */
77 strncpy(attribute->value, begin, value_len);
78 attribute->value[value_len] = '\0';
79 attribute->next = NULL;
80 if (context->head == NULL) {
81 context->head = attribute;
82 } else {
83 context->tail->next = attribute;
84 }
85 context->tail = attribute;
86 }
87 }
88
89 }
90 }
91
92 /*
93 * Return a list of attributes from the main section of the given JAR
94 * file. Returns NULL if there is an error or there aren't any attributes.
95 */
96 jarAttribute*
readAttributes(const char * jarfile)97 readAttributes(const char* jarfile)
98 {
99 int rc;
100 iterationContext context = { NULL, NULL };
101
102 rc = JLI_ManifestIterate(jarfile, doAttribute, (void*)&context);
103
104 if (rc == 0) {
105 return context.head;
106 } else {
107 freeAttributes(context.head);
108 return NULL;
109 }
110 }
111
112
113 /*
114 * Free a list of attributes
115 */
116 void
freeAttributes(jarAttribute * head)117 freeAttributes(jarAttribute* head) {
118 while (head != NULL) {
119 jarAttribute* next = (jarAttribute*)head->next;
120 free(head->name);
121 free(head->value);
122 free(head);
123 head = next;
124 }
125 }
126
127 /*
128 * Get the value of an attribute in an attribute list. Returns NULL
129 * if attribute not found.
130 */
131 char*
getAttribute(const jarAttribute * attributes,const char * name)132 getAttribute(const jarAttribute* attributes, const char* name) {
133 while (attributes != NULL) {
134 if (strcasecmp(attributes->name, name) == 0) {
135 return attributes->value;
136 }
137 attributes = (jarAttribute*)attributes->next;
138 }
139 return NULL;
140 }
141