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0a659cde CP |
1 | #include "newsearch.h" |
2 | #include "../lib/sstring.h" | |
3 | #include "../lib/strlfunc.h" | |
a3176c57 | 4 | #include "../lib/stringbuf.h" |
0a659cde CP |
5 | #include <stdarg.h> |
6 | #include <string.h> | |
7 | ||
8 | /* at least we have some type safety... */ | |
9 | typedef union exprunion { | |
10 | searchASTExpr *expr; | |
11 | char *literal; | |
12 | } exprunion; | |
13 | ||
14 | typedef struct searchASTCache { | |
15 | searchASTExpr *tree; | |
16 | searchASTExpr *cache[AST_RECENT]; | |
17 | int nextpos; | |
18 | } searchASTCache; | |
19 | ||
20 | /* comares either a string and a string or an expression and an expression */ | |
21 | static searchASTExpr *compareloc(searchASTExpr *expr, exprunion *loc) { | |
22 | if(expr->type == AST_NODE_LITERAL) { | |
23 | if(expr->u.literal == loc->literal) | |
24 | return expr; | |
25 | } else if(expr->type == AST_NODE_CHILD) { | |
26 | if(expr == loc->expr) | |
27 | return expr; | |
28 | } else { | |
29 | parseError = "static_parse_compare: bad node type"; | |
30 | return NULL; | |
31 | } | |
32 | return NULL; | |
33 | } | |
34 | ||
35 | /* searches the abstract syntax tree for the supplied expression/string */ | |
36 | static searchASTExpr *treesearch(searchASTExpr *expr, exprunion *loc) { | |
37 | searchASTExpr *ret = compareloc(expr, loc); | |
38 | if(ret) | |
39 | return ret; | |
40 | ||
41 | if(expr->type == AST_NODE_CHILD) { | |
42 | int i; | |
43 | for(i=0;i<expr->u.child->argc;i++) { | |
44 | searchASTExpr *d = treesearch(expr->u.child->argv[i], loc); | |
45 | if(d) | |
46 | return d; | |
47 | } | |
48 | } | |
49 | return NULL; | |
50 | } | |
51 | ||
52 | /* | |
53 | * searches the AST cache, if this fails it goes and searches the tree. | |
54 | * the cache is hit most of the time and I guess makes it nearly O(1) amortised... | |
55 | */ | |
56 | searchASTExpr *cachesearch(searchASTCache *cache, exprunion *loc) { | |
57 | searchASTExpr *ret = compareloc(cache->tree, loc); | |
58 | int i; | |
59 | if(ret) | |
60 | return ret; | |
61 | ||
62 | for(i=0;i<AST_RECENT;i++) { | |
63 | if(!cache->cache[i]) | |
64 | continue; | |
65 | ret = compareloc(cache->cache[i], loc); | |
66 | if(ret) | |
67 | return ret; | |
68 | } | |
69 | ||
70 | return treesearch(cache->tree, loc); | |
71 | } | |
72 | ||
73 | /* pushes an item into the cache */ | |
74 | static void cachepush(searchASTCache *cache, searchASTExpr *expr) { | |
75 | cache->cache[cache->nextpos] = expr; | |
76 | cache->nextpos = (cache->nextpos + 1) % AST_RECENT; | |
77 | } | |
78 | ||
79 | /* ast parser, the way we pass context around is very very hacky... */ | |
80 | searchNode *search_astparse(searchCtx *ctx, int type, char *loc) { | |
81 | searchASTCache *cache = ctx->arg; | |
82 | searchASTExpr *expr = cachesearch(cache, (exprunion *)&loc); | |
83 | searchNode *node; | |
84 | char **v; | |
85 | int i; | |
86 | ||
87 | if(!expr) { | |
88 | parseError = "WARNING: AST parsing failed"; | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | switch(expr->type) { | |
93 | case AST_NODE_LITERAL: | |
94 | if (!(node=(searchNode *)malloc(sizeof(searchNode)))) { | |
95 | parseError = "malloc: could not allocate memory for this search."; | |
96 | return NULL; | |
97 | } | |
98 | node->localdata = getsstring(expr->u.literal,512); | |
99 | node->returntype = RETURNTYPE_CONST | RETURNTYPE_STRING; | |
100 | node->exe = literal_exe; | |
101 | node->free = literal_free; | |
102 | return node; | |
103 | case AST_NODE_CHILD: | |
104 | v = (char **)malloc(expr->u.child->argc * sizeof(char *)); | |
105 | if(!v) { | |
106 | parseError = "malloc: could not allocate memory for this search."; | |
107 | return NULL; | |
108 | } | |
109 | for(i=0;i<expr->u.child->argc;i++) { | |
110 | searchASTExpr *child = expr->u.child->argv[i]; | |
111 | ||
112 | cachepush(cache, child); | |
113 | switch(child->type) { | |
114 | case AST_NODE_LITERAL: | |
115 | v[i] = child->u.literal; | |
116 | break; | |
117 | case AST_NODE_CHILD: | |
118 | v[i] = (char *)child; | |
119 | break; | |
120 | default: | |
121 | parseError = "static_parse: bad child node type"; | |
122 | free(v); | |
123 | return NULL; | |
124 | } | |
125 | } | |
126 | ||
127 | node = expr->u.child->fn(ctx, type, expr->u.child->argc, v); | |
128 | free(v); | |
129 | return node; | |
130 | default: | |
131 | parseError = "static_parse: bad node type"; | |
132 | return NULL; | |
133 | } | |
134 | } | |
135 | ||
2181a10f | 136 | int ast_nicksearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, NickDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { |
0a659cde CP |
137 | searchCtx ctx; |
138 | searchASTCache cache; | |
139 | searchNode *search; | |
140 | char buf[1024]; | |
141 | ||
142 | memset(&cache, 0, sizeof(cache)); | |
143 | cache.tree = tree; | |
144 | ||
b697c21c | 145 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache); |
0a659cde CP |
146 | |
147 | buf[0] = '\0'; | |
148 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree)); | |
149 | search = ctx.parser(&ctx, SEARCHTYPE_NICK, (char *)tree); | |
150 | if(!search) { | |
151 | reply(sender, "Parse error: %s", parseError); | |
152 | return CMD_ERROR; | |
153 | } | |
154 | ||
155 | reply(sender, "Executing..."); | |
2181a10f CP |
156 | if(header) |
157 | header(sender, headerarg); | |
0a659cde CP |
158 | nicksearch_exe(search, &ctx, sender, display, limit); |
159 | ||
160 | (search->free)(&ctx, search); | |
161 | ||
162 | return CMD_OK; | |
163 | } | |
164 | ||
2181a10f | 165 | int ast_chansearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, ChanDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { |
0a659cde CP |
166 | searchCtx ctx; |
167 | searchASTCache cache; | |
168 | searchNode *search; | |
169 | char buf[1024]; | |
170 | ||
b697c21c | 171 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache); |
0a659cde CP |
172 | |
173 | buf[0] = '\0'; | |
174 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree)); | |
175 | search = ctx.parser(&ctx, SEARCHTYPE_CHANNEL, (char *)tree); | |
176 | if(!search) { | |
177 | reply(sender, "Parse error: %s", parseError); | |
178 | return CMD_ERROR; | |
179 | } | |
180 | ||
181 | reply(sender, "Executing..."); | |
2181a10f CP |
182 | if(header) |
183 | header(sender, headerarg); | |
0a659cde CP |
184 | chansearch_exe(search, &ctx, sender, display, limit); |
185 | ||
186 | (search->free)(&ctx, search); | |
187 | ||
188 | return CMD_OK; | |
189 | } | |
190 | ||
2181a10f | 191 | int ast_usersearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, UserDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { |
cef8cb48 CP |
192 | searchCtx ctx; |
193 | searchASTCache cache; | |
194 | searchNode *search; | |
195 | char buf[1024]; | |
196 | ||
197 | memset(&cache, 0, sizeof(cache)); | |
198 | cache.tree = tree; | |
199 | ||
b697c21c | 200 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache); |
cef8cb48 CP |
201 | |
202 | buf[0] = '\0'; | |
203 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree)); | |
204 | search = ctx.parser(&ctx, SEARCHTYPE_USER, (char *)tree); | |
205 | if(!search) { | |
206 | reply(sender, "Parse error: %s", parseError); | |
207 | return CMD_ERROR; | |
208 | } | |
209 | ||
210 | reply(sender, "Executing..."); | |
2181a10f CP |
211 | if(header) |
212 | header(sender, headerarg); | |
cef8cb48 CP |
213 | usersearch_exe(search, &ctx, sender, display, limit); |
214 | ||
215 | (search->free)(&ctx, search); | |
216 | ||
217 | return CMD_OK; | |
218 | } | |
219 | ||
a3176c57 CP |
220 | |
221 | /* horribly inefficient -- don't call me very often! */ | |
222 | static char *ast_printtree_real(StringBuf *buf, searchASTExpr *expr) { | |
0a659cde CP |
223 | char lbuf[256]; |
224 | if(expr->type == AST_NODE_CHILD) { | |
225 | int i; | |
226 | sstring *command = getcommandname(searchTree, (void *)expr->u.child->fn); | |
0a659cde CP |
227 | |
228 | if(command) { | |
a3176c57 | 229 | snprintf(lbuf, sizeof(lbuf), "(%s", command->content); |
0a659cde | 230 | } else { |
a3176c57 | 231 | snprintf(lbuf, sizeof(lbuf), "(%p", expr->u.child->fn); |
0a659cde | 232 | } |
a3176c57 | 233 | sbaddstr(buf, lbuf); |
0a659cde | 234 | |
a3176c57 CP |
235 | for(i=0;i<expr->u.child->argc;i++) { |
236 | sbaddchar(buf, ' '); | |
237 | ast_printtree_real(buf, expr->u.child->argv[i]); | |
238 | } | |
239 | sbaddchar(buf, ')'); | |
0a659cde | 240 | |
0a659cde | 241 | } else if(expr->type == AST_NODE_LITERAL) { |
a3176c57 | 242 | sbaddstr(buf, expr->u.literal); |
0a659cde | 243 | } else { |
a3176c57 | 244 | sbaddstr(buf, "???"); |
0a659cde CP |
245 | } |
246 | ||
a3176c57 CP |
247 | return buf->buf; |
248 | } | |
249 | ||
250 | char *ast_printtree(char *buf, size_t bufsize, searchASTExpr *expr) { | |
251 | StringBuf b; | |
252 | char *p; | |
253 | ||
254 | b.capacity = bufsize; | |
255 | b.len = 0; | |
256 | b.buf = buf; | |
257 | ||
258 | p = ast_printtree_real(&b, expr); | |
259 | ||
260 | sbterminate(&b); | |
261 | return p; | |
0a659cde | 262 | } |