1 /*
2 Copyright 2021 Northern.tech AS
3
4 This file is part of CFEngine 3 - written and maintained by Northern.tech AS.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; version 3.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
18
19 To the extent this program is licensed as part of the Enterprise
20 versions of CFEngine, the applicable Commercial Open Source License
21 (COSL) may apply to this file if you as a licensee so wish it. See
22 included file COSL.txt.
23 */
24
25 #include <cf3.defs.h>
26
27 #include <files_names.h>
28 #include <vercmp_internal.h>
29 #include <rlist.h>
30
31 static void ParsePackageVersion(char *version, Rlist **num, Rlist **sep);
32
ComparePackageVersionsInternal(const char * v1,const char * v2,PackageVersionComparator cmp)33 VersionCmpResult ComparePackageVersionsInternal(const char *v1, const char *v2, PackageVersionComparator cmp)
34 {
35 Rlist *rp_pr, *rp_in;
36
37 int result = true;
38 int break_loop = false;
39 int cmp_result;
40 VersionCmpResult version_matched = VERCMP_NO_MATCH;
41
42 Rlist *numbers_pr = NULL, *separators_pr = NULL;
43 Rlist *numbers_in = NULL, *separators_in = NULL;
44
45 ParsePackageVersion(CanonifyChar(v1, ','), &numbers_pr, &separators_pr);
46 ParsePackageVersion(CanonifyChar(v2, ','), &numbers_in, &separators_in);
47
48 /* If the format of the version string doesn't match, we're already doomed */
49
50 Log(LOG_LEVEL_VERBOSE, "Check for compatible versioning model in (%s,%s)", v1, v2);
51
52 for (rp_pr = separators_pr, rp_in = separators_in; (rp_pr != NULL) && (rp_in != NULL);
53 rp_pr = rp_pr->next, rp_in = rp_in->next)
54 {
55 if (strcmp(RlistScalarValue(rp_pr), RlistScalarValue(rp_in)) != 0)
56 {
57 result = false;
58 break;
59 }
60
61 if ((rp_pr->next == NULL) && (rp_in->next == NULL))
62 {
63 result = true;
64 break;
65 }
66 }
67
68 if (result)
69 {
70 Log(LOG_LEVEL_VERBOSE, "Verified that versioning models are compatible");
71 }
72 else
73 {
74 Log(LOG_LEVEL_VERBOSE, "Versioning models for (%s,%s) were incompatible", v1, v2);
75 version_matched = VERCMP_ERROR;
76 }
77
78 int version_equal = (strcmp(v2, v1) == 0);
79
80 if (result)
81 {
82 for (rp_pr = numbers_pr, rp_in = numbers_in; (rp_pr != NULL) && (rp_in != NULL);
83 rp_pr = rp_pr->next, rp_in = rp_in->next)
84 {
85 cmp_result = strcmp(RlistScalarValue(rp_pr), RlistScalarValue(rp_in));
86
87 switch (cmp)
88 {
89 case PACKAGE_VERSION_COMPARATOR_EQ:
90 case PACKAGE_VERSION_COMPARATOR_NONE:
91 if (version_equal)
92 {
93 version_matched = VERCMP_MATCH;
94 }
95 break;
96 case PACKAGE_VERSION_COMPARATOR_NEQ:
97 if (!version_equal)
98 {
99 version_matched = VERCMP_MATCH;
100 }
101 break;
102 case PACKAGE_VERSION_COMPARATOR_GT:
103 if (cmp_result > 0)
104 {
105 version_matched = VERCMP_MATCH;
106 }
107 else if (cmp_result < 0)
108 {
109 break_loop = true;
110 }
111 break;
112 case PACKAGE_VERSION_COMPARATOR_LT:
113 if (cmp_result < 0)
114 {
115 version_matched = VERCMP_MATCH;
116 }
117 else if (cmp_result > 0)
118 {
119 break_loop = true;
120 }
121 break;
122 case PACKAGE_VERSION_COMPARATOR_GE:
123 if ((cmp_result > 0) || version_equal)
124 {
125 version_matched = VERCMP_MATCH;
126 }
127 else if (cmp_result < 0)
128 {
129 break_loop = true;
130 }
131 break;
132 case PACKAGE_VERSION_COMPARATOR_LE:
133 if ((cmp_result < 0) || version_equal)
134 {
135 version_matched = VERCMP_MATCH;
136 }
137 else if (cmp_result > 0)
138 {
139 break_loop = true;
140 }
141 break;
142 default:
143 break;
144 }
145
146 if ((version_matched == VERCMP_MATCH) || break_loop)
147 {
148 rp_pr = NULL;
149 rp_in = NULL;
150 break;
151 }
152 }
153
154 if (rp_pr != NULL)
155 {
156 if ((cmp == PACKAGE_VERSION_COMPARATOR_GT) || (cmp == PACKAGE_VERSION_COMPARATOR_GE))
157 {
158 version_matched = VERCMP_MATCH;
159 }
160 }
161 if (rp_in != NULL)
162 {
163 if ((cmp == PACKAGE_VERSION_COMPARATOR_LT) || (cmp == PACKAGE_VERSION_COMPARATOR_LE))
164 {
165 version_matched = VERCMP_MATCH;
166 }
167 }
168 }
169
170 RlistDestroy(numbers_pr);
171 RlistDestroy(numbers_in);
172 RlistDestroy(separators_pr);
173 RlistDestroy(separators_in);
174
175 return version_matched;
176 }
177
ParsePackageVersion(char * version,Rlist ** num,Rlist ** sep)178 static void ParsePackageVersion(char *version, Rlist **num, Rlist **sep)
179 {
180 char *sp, numeral[30], separator[2];
181
182 if (version == NULL)
183 {
184 return;
185 }
186
187 for (sp = version; *sp != '\0'; sp++)
188 {
189 memset(numeral, 0, 30);
190 memset(separator, 0, 2);
191
192 /* Split in 2's complement */
193
194 sscanf(sp, "%29[0-9a-zA-Z]", numeral);
195 sp += strlen(numeral);
196
197 /* Append to end up with left->right (major->minor) comparison */
198
199 RlistAppendScalar(num, numeral);
200
201 if (*sp == '\0')
202 {
203 return;
204 }
205
206 sscanf(sp, "%1[^0-9a-zA-Z]", separator);
207 RlistAppendScalar(sep, separator);
208 }
209 }
210