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1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
acfe7306 | 3 | // $Id: versionmatch.cc,v 1.9 2003/05/19 17:58:26 doogie Exp $ |
b2e465d6 AL |
4 | /* ###################################################################### |
5 | ||
6 | Version Matching | |
7 | ||
8 | This module takes a matching string and a type and locates the version | |
9 | record that satisfies the constraint described by the matching string. | |
10 | ||
11 | ##################################################################### */ | |
12 | /*}}}*/ | |
13 | // Include Files /*{{{*/ | |
14 | #ifdef __GNUG__ | |
15 | #pragma implementation "apt-pkg/versionmatch.h" | |
16 | #endif | |
17 | #include <apt-pkg/versionmatch.h> | |
18 | ||
19 | #include <apt-pkg/strutl.h> | |
20 | #include <apt-pkg/error.h> | |
21 | ||
22 | #include <stdio.h> | |
8d9850a1 | 23 | #include <ctype.h> |
b2e465d6 AL |
24 | /*}}}*/ |
25 | ||
26 | // VersionMatch::pkgVersionMatch - Constructor /*{{{*/ | |
27 | // --------------------------------------------------------------------- | |
28 | /* Break up the data string according to the selected type */ | |
29 | pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type) | |
30 | { | |
4e0680f9 AL |
31 | MatchAll = false; |
32 | VerPrefixMatch = false; | |
33 | RelVerPrefixMatch = false; | |
34 | ||
b2e465d6 AL |
35 | if (Type == None || Data.length() < 1) |
36 | return; | |
37 | ||
38 | // Cut up the version representation | |
39 | if (Type == Version) | |
40 | { | |
41 | if (Data.end()[-1] == '*') | |
42 | { | |
43 | VerPrefixMatch = true; | |
8d9850a1 | 44 | VerStr = string(Data,0,Data.length()-1); |
b2e465d6 AL |
45 | } |
46 | else | |
47 | VerStr = Data; | |
48 | return; | |
49 | } | |
50 | ||
51 | if (Type == Release) | |
52 | { | |
53 | // All empty = match all | |
54 | if (Data == "*") | |
0a5e4a03 AL |
55 | { |
56 | MatchAll = true; | |
b2e465d6 | 57 | return; |
0a5e4a03 AL |
58 | } |
59 | ||
b2e465d6 | 60 | // Are we a simple specification? |
8d9850a1 AL |
61 | string::const_iterator I = Data.begin(); |
62 | for (; I != Data.end() && *I != '='; I++); | |
b2e465d6 AL |
63 | if (I == Data.end()) |
64 | { | |
65 | // Temporary | |
66 | if (isdigit(Data[0])) | |
67 | RelVerStr = Data; | |
68 | else | |
69 | RelArchive = Data; | |
70 | ||
b8b7c37d | 71 | if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*') |
b2e465d6 AL |
72 | { |
73 | RelVerPrefixMatch = true; | |
74 | RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); | |
75 | } | |
76 | return; | |
77 | } | |
78 | ||
79 | char Spec[300]; | |
80 | char *Fragments[20]; | |
81 | snprintf(Spec,sizeof(Spec),"%s",Data.c_str()); | |
82 | if (TokSplitString(',',Spec,Fragments, | |
83 | sizeof(Fragments)/sizeof(Fragments[0])) == false) | |
84 | { | |
85 | Type = None; | |
86 | return; | |
87 | } | |
88 | ||
89 | for (unsigned J = 0; Fragments[J] != 0; J++) | |
90 | { | |
91 | if (strlen(Fragments[J]) < 3) | |
92 | continue; | |
93 | ||
94 | if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0) | |
95 | RelVerStr = Fragments[J]+2; | |
96 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0) | |
97 | RelOrigin = Fragments[J]+2; | |
98 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0) | |
99 | RelArchive = Fragments[J]+2; | |
100 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0) | |
101 | RelLabel = Fragments[J]+2; | |
102 | else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0) | |
103 | RelComponent = Fragments[J]+2; | |
104 | } | |
105 | ||
106 | if (RelVerStr.end()[-1] == '*') | |
107 | { | |
108 | RelVerPrefixMatch = true; | |
109 | RelVerStr = string(RelVerStr.begin(),RelVerStr.end()-1); | |
110 | } | |
111 | return; | |
112 | } | |
113 | ||
114 | if (Type == Origin) | |
115 | { | |
116 | OrSite = Data; | |
117 | return; | |
118 | } | |
119 | } | |
120 | /*}}}*/ | |
121 | // VersionMatch::MatchVer - Match a version string with prefixing /*{{{*/ | |
122 | // --------------------------------------------------------------------- | |
123 | /* */ | |
124 | bool pkgVersionMatch::MatchVer(const char *A,string B,bool Prefix) | |
125 | { | |
126 | const char *Ab = A; | |
127 | const char *Ae = Ab + strlen(A); | |
128 | ||
129 | // Strings are not a compatible size. | |
130 | if ((unsigned)(Ae - Ab) != B.length() && Prefix == false || | |
131 | (unsigned)(Ae - Ab) < B.length()) | |
132 | return false; | |
133 | ||
134 | // Match (leading?) | |
8d9850a1 | 135 | if (stringcasecmp(B,Ab,Ab + B.length()) == 0) |
b2e465d6 AL |
136 | return true; |
137 | ||
138 | return false; | |
139 | } | |
140 | /*}}}*/ | |
141 | // VersionMatch::Find - Locate the best match for the select type /*{{{*/ | |
142 | // --------------------------------------------------------------------- | |
143 | /* */ | |
144 | pkgCache::VerIterator pkgVersionMatch::Find(pkgCache::PkgIterator Pkg) | |
145 | { | |
146 | pkgCache::VerIterator Ver = Pkg.VersionList(); | |
147 | for (; Ver.end() == false; Ver++) | |
148 | { | |
149 | if (Type == Version) | |
150 | { | |
151 | if (MatchVer(Ver.VerStr(),VerStr,VerPrefixMatch) == true) | |
152 | return Ver; | |
153 | continue; | |
154 | } | |
155 | ||
156 | for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++) | |
157 | if (FileMatch(VF.File()) == true) | |
158 | return Ver; | |
159 | } | |
160 | ||
161 | // This will be Ended by now. | |
162 | return Ver; | |
163 | } | |
164 | /*}}}*/ | |
165 | // VersionMatch::FileMatch - Match against an index file /*{{{*/ | |
166 | // --------------------------------------------------------------------- | |
167 | /* This matcher checks against the release file and the origin location | |
168 | to see if the constraints are met. */ | |
169 | bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File) | |
170 | { | |
171 | if (Type == Release) | |
172 | { | |
0a5e4a03 AL |
173 | if (MatchAll == true) |
174 | return true; | |
175 | ||
b2e465d6 | 176 | /* cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl; |
af87ab54 AL |
177 | cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/ |
178 | ||
b2e465d6 AL |
179 | if (RelVerStr.empty() == true && RelOrigin.empty() == true && |
180 | RelArchive.empty() == true && RelLabel.empty() == true && | |
181 | RelComponent.empty() == true) | |
182 | return false; | |
183 | ||
184 | if (RelVerStr.empty() == false) | |
185 | if (File->Version == 0 || | |
186 | MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false) | |
187 | return false; | |
188 | if (RelOrigin.empty() == false) | |
189 | if (File->Origin == 0 || | |
190 | stringcasecmp(RelOrigin,File.Origin()) != 0) | |
191 | return false; | |
192 | if (RelArchive.empty() == false) | |
193 | { | |
194 | if (File->Archive == 0 || | |
195 | stringcasecmp(RelArchive,File.Archive()) != 0) | |
196 | return false; | |
197 | } | |
198 | if (RelLabel.empty() == false) | |
199 | if (File->Label == 0 || | |
200 | stringcasecmp(RelLabel,File.Label()) != 0) | |
201 | return false; | |
202 | if (RelComponent.empty() == false) | |
203 | if (File->Component == 0 || | |
af87ab54 | 204 | stringcasecmp(RelComponent,File.Component()) != 0) |
b2e465d6 AL |
205 | return false; |
206 | return true; | |
207 | } | |
208 | ||
209 | if (Type == Origin) | |
210 | { | |
acfe7306 AL |
211 | if (OrSite.empty() == false) { |
212 | if (File->Site == 0 || OrSite != File.Site()) | |
213 | return false; | |
214 | } else // so we are talking about file:// or status file | |
215 | if (strcmp(File.Site(),"") == 0 && File->Archive != 0) // skip the status file | |
216 | return false; | |
5955efd4 | 217 | return (OrSite == File.Site()); /* both strings match */ |
b2e465d6 AL |
218 | } |
219 | ||
220 | return false; | |
221 | } | |
222 | /*}}}*/ |