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Commit | Line | Data |
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c86edd1d Q |
1 | /* channelindex.c */ |
2 | ||
3 | #include "channel.h" | |
4 | #include "../irc/irc_config.h" | |
5 | #include "../lib/irc_string.h" | |
6 | #include <stdio.h> | |
7 | ||
8 | #define channelhash(x) (crc32i(x)%CHANNELHASHSIZE) | |
9 | ||
10 | chanindex *chantable[CHANNELHASHSIZE]; | |
11 | sstring *extnames[MAXCHANNELEXTS]; | |
12 | ||
13 | unsigned int channelmarker; | |
14 | ||
15 | void initchannelindex() { | |
16 | memset(chantable,0,sizeof(chantable)); | |
17 | memset(extnames,0,sizeof(extnames)); | |
18 | channelmarker=0; | |
19 | } | |
20 | ||
21 | chanindex *findchanindex(const char *name) { | |
22 | chanindex *cip; | |
23 | int hash=channelhash(name); | |
24 | ||
25 | for (cip=chantable[hash];cip;cip=cip->next) { | |
26 | if (!ircd_strcmp(cip->name->content,name)) { | |
27 | return cip; | |
28 | } | |
29 | } | |
30 | ||
31 | return NULL; | |
32 | } | |
33 | ||
34 | chanindex *findorcreatechanindex(const char *name) { | |
35 | chanindex *cip; | |
36 | int hash=channelhash(name); | |
37 | int i; | |
38 | ||
39 | for (cip=chantable[hash];cip;cip=cip->next) { | |
40 | if (!ircd_strcmp(cip->name->content,name)) { | |
41 | return cip; | |
42 | } | |
43 | } | |
44 | ||
45 | cip=getchanindex(); | |
46 | ||
47 | cip->name=getsstring(name,CHANNELLEN); | |
48 | cip->channel=NULL; | |
49 | cip->marker=0; | |
50 | cip->next=chantable[hash]; | |
51 | chantable[hash]=cip; | |
52 | ||
53 | for(i=0;i<MAXCHANNELEXTS;i++) { | |
54 | cip->exts[i]=NULL; | |
55 | } | |
56 | ||
57 | return cip; | |
58 | } | |
59 | ||
60 | void releasechanindex(chanindex *cip) { | |
61 | int i; | |
62 | chanindex **cih; | |
63 | int hash; | |
64 | ||
65 | /* If any module is still using the channel, do nothing */ | |
66 | /* Same if the channel is still present on the network */ | |
67 | ||
68 | if (cip->channel!=NULL) { | |
69 | return; | |
70 | } | |
71 | ||
72 | for (i=0;i<MAXCHANNELEXTS;i++) { | |
73 | if (cip->exts[i]!=NULL) { | |
74 | return; | |
75 | } | |
76 | } | |
77 | ||
78 | /* Now remove the index record from the index. */ | |
79 | hash=channelhash(cip->name->content); | |
80 | ||
81 | for(cih=&(chantable[hash]);*cih;cih=&((*cih)->next)) { | |
82 | if (*cih==cip) { | |
83 | (*cih)=cip->next; | |
84 | freesstring(cip->name); | |
85 | freechanindex(cip); | |
86 | return; | |
87 | } | |
88 | } | |
89 | ||
90 | Error("channel",ERR_ERROR,"Tried to release chanindex record for %s not found in hash",cip->name->content); | |
91 | } | |
92 | ||
93 | int registerchanext(const char *name) { | |
94 | int i; | |
95 | ||
96 | if (findchanext(name)!=-1) { | |
97 | Error("channel",ERR_WARNING,"Tried to register duplicate extension %s",name); | |
98 | return -1; | |
99 | } | |
100 | ||
101 | for (i=0;i<MAXCHANNELEXTS;i++) { | |
102 | if (extnames[i]==NULL) { | |
103 | extnames[i]=getsstring(name,100); | |
104 | return i; | |
105 | } | |
106 | } | |
107 | ||
108 | Error("channel",ERR_WARNING,"Tried to register too many extensions: %s",name); | |
109 | return -1; | |
110 | } | |
111 | ||
112 | int findchanext(const char *name) { | |
113 | int i; | |
114 | ||
115 | for (i=0;i<MAXCHANNELEXTS;i++) { | |
116 | if (extnames[i]!=NULL && !ircd_strcmp(name,extnames[i]->content)) { | |
117 | return i; | |
118 | } | |
119 | } | |
120 | ||
121 | return -1; | |
122 | } | |
123 | ||
124 | void releasechanext(int index) { | |
125 | int i; | |
126 | chanindex *cip,*ncip; | |
127 | ||
128 | freesstring(extnames[index]); | |
129 | extnames[index]=NULL; | |
130 | ||
131 | for (i=0;i<CHANNELHASHSIZE;i++) { | |
132 | for (cip=chantable[i];cip;cip=ncip) { | |
133 | /* CAREFUL: deleting items from chains you're walking is bad */ | |
134 | ncip=cip->next; | |
135 | if (cip->exts[index]!=NULL) { | |
136 | cip->exts[index]=NULL; | |
137 | releasechanindex(cip); | |
138 | } | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
143 | unsigned int nextchanmarker() { | |
144 | int i; | |
145 | chanindex *cip; | |
146 | ||
147 | channelmarker++; | |
148 | if (!channelmarker) { | |
149 | /* If we wrapped to zero, zap the marker on all records */ | |
150 | for (i=0;i<CHANNELHASHSIZE;i++) | |
151 | for (cip=chantable[i];cip;cip=cip->next) | |
152 | cip->marker=0; | |
153 | channelmarker++; | |
154 | } | |
155 | ||
156 | return channelmarker; | |
157 | } |