]>
Commit | Line | Data |
---|---|---|
1 | #include "newsearch.h" | |
2 | #include "../lib/sstring.h" | |
3 | #include "../lib/strlfunc.h" | |
4 | #include "../lib/stringbuf.h" | |
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 | /* comares either a string and a string or an expression and an expression */ | |
15 | static searchASTExpr *compareloc(searchASTExpr *expr, exprunion *loc) { | |
16 | if(expr->type == AST_NODE_LITERAL) { | |
17 | if(expr->u.literal == loc->literal) | |
18 | return expr; | |
19 | } else if(expr->type == AST_NODE_CHILD) { | |
20 | if(expr == loc->expr) | |
21 | return expr; | |
22 | } else { | |
23 | parseError = "static_parse_compare: bad node type"; | |
24 | return NULL; | |
25 | } | |
26 | return NULL; | |
27 | } | |
28 | ||
29 | /* searches the abstract syntax tree for the supplied expression/string */ | |
30 | static searchASTExpr *treesearch(searchASTExpr *expr, exprunion *loc) { | |
31 | searchASTExpr *ret = compareloc(expr, loc); | |
32 | if(ret) | |
33 | return ret; | |
34 | ||
35 | if(expr->type == AST_NODE_CHILD) { | |
36 | int i; | |
37 | for(i=0;i<expr->u.child.argc;i++) { | |
38 | searchASTExpr *d = treesearch(&expr->u.child.argv[i], loc); | |
39 | if(d) | |
40 | return d; | |
41 | } | |
42 | } | |
43 | return NULL; | |
44 | } | |
45 | ||
46 | /* | |
47 | * searches the AST cache, if this fails it goes and searches the tree. | |
48 | * the cache is hit most of the time and I guess makes it nearly O(1) amortised... | |
49 | */ | |
50 | searchASTExpr *cachesearch(searchASTCache *cache, exprunion *loc) { | |
51 | searchASTExpr *ret = compareloc(cache->tree, loc); | |
52 | int i; | |
53 | if(ret) | |
54 | return ret; | |
55 | ||
56 | for(i=0;i<AST_RECENT;i++) { | |
57 | if(!cache->cache[i]) | |
58 | continue; | |
59 | ret = compareloc(cache->cache[i], loc); | |
60 | if(ret) | |
61 | return ret; | |
62 | } | |
63 | ||
64 | return treesearch(cache->tree, loc); | |
65 | } | |
66 | ||
67 | /* pushes an item into the cache */ | |
68 | static void cachepush(searchASTCache *cache, searchASTExpr *expr) { | |
69 | cache->cache[cache->nextpos] = expr; | |
70 | cache->nextpos = (cache->nextpos + 1) % AST_RECENT; | |
71 | } | |
72 | ||
73 | /* ast parser, the way we pass context around is very very hacky... */ | |
74 | searchNode *search_astparse(searchCtx *ctx, char *loc) { | |
75 | searchASTCache *cache = ctx->arg; | |
76 | searchASTExpr *expr = cachesearch(cache, (exprunion *)&loc); | |
77 | searchNode *node; | |
78 | char **v; | |
79 | int i; | |
80 | ||
81 | if(!expr) { | |
82 | parseError = "WARNING: AST parsing failed"; | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | switch(expr->type) { | |
87 | case AST_NODE_LITERAL: | |
88 | if (!(node=(searchNode *)malloc(sizeof(searchNode)))) { | |
89 | parseError = "malloc: could not allocate memory for this search."; | |
90 | return NULL; | |
91 | } | |
92 | node->localdata = getsstring(expr->u.literal,512); | |
93 | node->returntype = RETURNTYPE_CONST | RETURNTYPE_STRING; | |
94 | node->exe = literal_exe; | |
95 | node->free = literal_free; | |
96 | return node; | |
97 | case AST_NODE_CHILD: | |
98 | v = (char **)malloc(expr->u.child.argc * sizeof(char *)); | |
99 | if(!v) { | |
100 | parseError = "malloc: could not allocate memory for this search."; | |
101 | return NULL; | |
102 | } | |
103 | for(i=0;i<expr->u.child.argc;i++) { | |
104 | searchASTExpr *child = &expr->u.child.argv[i]; | |
105 | ||
106 | cachepush(cache, child); | |
107 | switch(child->type) { | |
108 | case AST_NODE_LITERAL: | |
109 | v[i] = child->u.literal; | |
110 | break; | |
111 | case AST_NODE_CHILD: | |
112 | v[i] = (char *)child; | |
113 | break; | |
114 | default: | |
115 | parseError = "static_parse: bad child node type"; | |
116 | free(v); | |
117 | return NULL; | |
118 | } | |
119 | } | |
120 | ||
121 | node = expr->u.child.fn(ctx, expr->u.child.argc, v); | |
122 | free(v); | |
123 | return node; | |
124 | default: | |
125 | parseError = "static_parse: bad node type"; | |
126 | return NULL; | |
127 | } | |
128 | } | |
129 | ||
130 | int ast_nicksearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, NickDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { | |
131 | searchCtx ctx; | |
132 | searchASTCache cache; | |
133 | searchNode *search; | |
134 | char buf[1024]; | |
135 | ||
136 | memset(&cache, 0, sizeof(cache)); | |
137 | cache.tree = tree; | |
138 | ||
139 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache, reg_nicksearch, sender, display, limit); | |
140 | ||
141 | buf[0] = '\0'; | |
142 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree, reg_nicksearch)); | |
143 | search = ctx.parser(&ctx, (char *)tree); | |
144 | if(!search) { | |
145 | reply(sender, "Parse error: %s", parseError); | |
146 | return CMD_ERROR; | |
147 | } | |
148 | ||
149 | reply(sender, "Executing..."); | |
150 | if(header) | |
151 | header(sender, headerarg); | |
152 | nicksearch_exe(search, &ctx); | |
153 | ||
154 | (search->free)(&ctx, search); | |
155 | ||
156 | return CMD_OK; | |
157 | } | |
158 | ||
159 | int ast_chansearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, ChanDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { | |
160 | searchCtx ctx; | |
161 | searchASTCache cache; | |
162 | searchNode *search; | |
163 | char buf[1024]; | |
164 | ||
165 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache, reg_chansearch, sender, display, limit); | |
166 | ||
167 | memset(&cache, 0, sizeof(cache)); | |
168 | cache.tree = tree; | |
169 | ||
170 | buf[0] = '\0'; | |
171 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree, reg_chansearch)); | |
172 | search = ctx.parser(&ctx, (char *)tree); | |
173 | if(!search) { | |
174 | reply(sender, "Parse error: %s", parseError); | |
175 | return CMD_ERROR; | |
176 | } | |
177 | ||
178 | reply(sender, "Executing..."); | |
179 | if(header) | |
180 | header(sender, headerarg); | |
181 | chansearch_exe(search, &ctx); | |
182 | ||
183 | (search->free)(&ctx, search); | |
184 | ||
185 | return CMD_OK; | |
186 | } | |
187 | ||
188 | int ast_usersearch(searchASTExpr *tree, replyFunc reply, void *sender, wallFunc wall, UserDisplayFunc display, HeaderFunc header, void *headerarg, int limit) { | |
189 | searchCtx ctx; | |
190 | searchASTCache cache; | |
191 | searchNode *search; | |
192 | char buf[1024]; | |
193 | ||
194 | memset(&cache, 0, sizeof(cache)); | |
195 | cache.tree = tree; | |
196 | ||
197 | newsearch_ctxinit(&ctx, search_astparse, reply, wall, &cache, reg_usersearch, sender, display, limit); | |
198 | ||
199 | buf[0] = '\0'; | |
200 | reply(sender, "Parsing: %s", ast_printtree(buf, sizeof(buf), tree, reg_usersearch)); | |
201 | search = ctx.parser(&ctx, (char *)tree); | |
202 | if(!search) { | |
203 | reply(sender, "Parse error: %s", parseError); | |
204 | return CMD_ERROR; | |
205 | } | |
206 | ||
207 | reply(sender, "Executing..."); | |
208 | if(header) | |
209 | header(sender, headerarg); | |
210 | usersearch_exe(search, &ctx); | |
211 | ||
212 | (search->free)(&ctx, search); | |
213 | ||
214 | return CMD_OK; | |
215 | } | |
216 | ||
217 | ||
218 | /* horribly inefficient -- don't call me very often! */ | |
219 | static char *ast_printtree_real(StringBuf *buf, searchASTExpr *expr, searchCmd *cmd) { | |
220 | char lbuf[256]; | |
221 | if(expr->type == AST_NODE_CHILD) { | |
222 | int i; | |
223 | sstring *command = getcommandname(cmd->searchtree, (void *)expr->u.child.fn); | |
224 | ||
225 | if(command) { | |
226 | snprintf(lbuf, sizeof(lbuf), "(%s", command->content); | |
227 | } else { | |
228 | snprintf(lbuf, sizeof(lbuf), "(%p", expr->u.child.fn); | |
229 | } | |
230 | sbaddstr(buf, lbuf); | |
231 | ||
232 | for(i=0;i<expr->u.child.argc;i++) { | |
233 | sbaddchar(buf, ' '); | |
234 | ast_printtree_real(buf, &expr->u.child.argv[i], cmd); | |
235 | } | |
236 | sbaddchar(buf, ')'); | |
237 | ||
238 | } else if(expr->type == AST_NODE_LITERAL) { | |
239 | char *p; | |
240 | ||
241 | sbaddchar(buf, '"'); | |
242 | ||
243 | for(p=expr->u.literal;*p;p++) { | |
244 | if(*p == '\\' || *p == '"') | |
245 | sbaddchar(buf, '\\'); | |
246 | sbaddchar(buf, *p); | |
247 | } | |
248 | ||
249 | sbaddchar(buf, '"'); | |
250 | } else { | |
251 | sbaddstr(buf, "???"); | |
252 | } | |
253 | ||
254 | return buf->buf; | |
255 | } | |
256 | ||
257 | char *ast_printtree(char *buf, size_t bufsize, searchASTExpr *expr, searchCmd *cmd) { | |
258 | StringBuf b; | |
259 | char *p; | |
260 | ||
261 | b.capacity = bufsize; | |
262 | b.len = 0; | |
263 | b.buf = buf; | |
264 | ||
265 | p = ast_printtree_real(&b, expr, cmd); | |
266 | ||
267 | sbterminate(&b); | |
268 | return p; | |
269 | } |