Mercurial > hg > octave-kai > gnulib-hg
annotate tests/test-tsearch.c @ 17082:62741e75b7c5
poll/select: document portability problems not fixed by Gnulib.
* doc/posix-functions/poll.texi: poll does not work well on
pipes under Windows. It has the same limitations as select on
BeOS.
* doc/posix-functions/select.texi: select does not work well
on pipes under Windows.
| author | Paolo Bonzini <pbonzini@redhat.com> |
|---|---|
| date | Thu, 13 Sep 2012 08:51:16 +0200 |
| parents | a712776b11ce |
| children | e542fd46ad6f |
| rev | line source |
|---|---|
| 8534 | 1 /* Test program for tsearch et al. |
|
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2 Copyright (C) 1997, 2000-2001, 2007-2012 Free Software Foundation, Inc. |
| 8534 | 3 This file is part of the GNU C Library. |
| 4 | |
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5 The GNU C Library is free software: you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public License as |
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7 published by the Free Software Foundation; either version 3 of the |
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8 License, or (at your option) any later version. |
| 8534 | 9 |
| 10 The GNU C Library 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 GNU | |
| 13 Lesser General Public License for more details. | |
| 14 | |
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15 You should have received a copy of the GNU Lesser General Public License |
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 8534 | 17 |
| 18 #include <config.h> | |
| 19 | |
| 20 #include <search.h> | |
| 21 | |
| 12489 | 22 #include "signature.h" |
| 23 SIGNATURE_CHECK (tdelete, void *, (void const *, void **, | |
| 24 int (*) (void const *, void const *))); | |
| 25 SIGNATURE_CHECK (tfind, void *, (void const *, void * const *, | |
| 26 int (*) (void const *, void const *))); | |
| 27 SIGNATURE_CHECK (tsearch, void *, (void const *, void **, | |
| 28 int (*) (void const *, void const *))); | |
| 29 SIGNATURE_CHECK (twalk, void, (void const *, | |
| 30 void (*) (void const *, VISIT, int))); | |
| 31 | |
| 8534 | 32 #include <stdint.h> |
| 33 #include <stdio.h> | |
| 34 #include <stdlib.h> | |
| 35 #include <string.h> | |
| 36 | |
| 37 #define SEED 0 | |
| 38 #if HAVE_TSEARCH | |
| 39 /* The system's tsearch() is not expected to keep the tree balanced. */ | |
| 40 # define BALANCED 0 | |
| 41 #else | |
| 42 /* The gnulib replacement tsearch() should keep the tree balanced. */ | |
| 43 # define BALANCED 1 | |
| 44 #endif | |
| 45 #define PASSES 100 | |
| 46 | |
| 47 #if BALANCED | |
| 48 #include <math.h> | |
| 49 #define SIZE 1000 | |
| 50 #else | |
| 51 #define SIZE 100 | |
| 52 #endif | |
| 53 | |
| 54 #undef random | |
| 55 #define random() (int) ((unsigned int) rand () >> 3) | |
| 56 | |
| 57 enum order | |
| 58 { | |
| 59 ascending, | |
| 60 descending, | |
| 61 randomorder | |
| 62 }; | |
| 63 | |
| 64 enum action | |
| 65 { | |
| 66 build, | |
| 67 build_and_del, | |
| 68 delete, | |
| 69 find | |
| 70 }; | |
| 71 | |
| 72 /* Set to 1 if a test is flunked. */ | |
| 73 static int error = 0; | |
| 74 | |
| 75 /* The keys we add to the tree. */ | |
| 76 static int x[SIZE]; | |
| 77 | |
| 16358 | 78 /* Pointers into the key array, possibly permuted, to define an order |
| 8534 | 79 for insertion/removal. */ |
| 80 static int y[SIZE]; | |
| 81 | |
| 82 /* Flags set for each element visited during a tree walk. */ | |
| 83 static int z[SIZE]; | |
| 84 | |
| 85 /* Depths for all the elements, to check that the depth is constant for | |
| 86 all three visits. */ | |
| 87 static int depths[SIZE]; | |
| 88 | |
| 89 /* Maximum depth during a tree walk. */ | |
| 90 static int max_depth; | |
| 91 | |
| 92 /* Compare two keys. */ | |
| 93 static int | |
| 94 cmp_fn (const void *a, const void *b) | |
| 95 { | |
| 96 return *(const int *) a - *(const int *) b; | |
| 97 } | |
| 98 | |
| 99 /* Permute an array of integers. */ | |
| 100 static void | |
| 101 memfry (int *string) | |
| 102 { | |
| 103 int i; | |
| 104 | |
| 105 for (i = 0; i < SIZE; ++i) | |
| 106 { | |
| 107 int32_t j; | |
| 108 int c; | |
| 109 | |
| 110 j = random () % SIZE; | |
| 111 | |
| 112 c = string[i]; | |
| 113 string[i] = string[j]; | |
| 114 string[j] = c; | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 static void | |
| 119 walk_action (const void *nodep, const VISIT which, const int depth) | |
| 120 { | |
| 121 int key = **(int **) nodep; | |
| 122 | |
| 123 if (depth > max_depth) | |
| 124 max_depth = depth; | |
| 125 if (which == leaf || which == preorder) | |
| 126 { | |
| 127 ++z[key]; | |
| 128 depths[key] = depth; | |
| 129 } | |
| 130 else | |
| 131 { | |
| 132 if (depths[key] != depth) | |
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133 { |
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134 fputs ("Depth for one element is not constant during tree walk.\n", |
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135 stdout); |
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136 } |
| 8534 | 137 } |
| 138 } | |
| 139 | |
| 140 static void | |
| 141 walk_tree (void *root, int expected_count) | |
| 142 { | |
| 143 int i; | |
| 144 | |
| 145 memset (z, 0, sizeof z); | |
| 146 max_depth = 0; | |
| 147 | |
| 148 twalk (root, walk_action); | |
| 149 for (i = 0; i < expected_count; ++i) | |
| 150 if (z[i] != 1) | |
| 151 { | |
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152 fputs ("Node was not visited.\n", stdout); |
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153 error = 1; |
| 8534 | 154 } |
| 155 | |
| 156 #if BALANCED | |
| 157 if (max_depth > log (expected_count) * 2 + 2) | |
| 158 #else | |
| 159 if (max_depth > expected_count) | |
| 160 #endif | |
| 161 { | |
| 162 fputs ("Depth too large during tree walk.\n", stdout); | |
| 163 error = 1; | |
| 164 } | |
| 165 } | |
| 166 | |
| 167 /* Perform an operation on a tree. */ | |
| 168 static void | |
| 169 mangle_tree (enum order how, enum action what, void **root, int lag) | |
| 170 { | |
| 171 int i; | |
| 172 | |
| 173 if (how == randomorder) | |
| 174 { | |
| 175 for (i = 0; i < SIZE; ++i) | |
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176 y[i] = i; |
| 8534 | 177 memfry (y); |
| 178 } | |
| 179 | |
| 180 for (i = 0; i < SIZE + lag; ++i) | |
| 181 { | |
| 182 void *elem; | |
| 183 int j, k; | |
| 184 | |
| 185 switch (how) | |
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186 { |
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187 case randomorder: |
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188 if (i >= lag) |
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189 k = y[i - lag]; |
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190 else |
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191 /* Ensure that the array index is within bounds. */ |
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192 k = y[(SIZE - i - 1 + lag) % SIZE]; |
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193 j = y[i % SIZE]; |
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194 break; |
| 8534 | 195 |
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196 case ascending: |
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197 k = i - lag; |
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198 j = i; |
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199 break; |
| 8534 | 200 |
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201 case descending: |
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202 k = SIZE - i - 1 + lag; |
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203 j = SIZE - i - 1; |
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204 break; |
| 8534 | 205 |
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206 default: |
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207 /* This never should happen, but gcc isn't smart enough to |
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208 recognize it. */ |
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209 abort (); |
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210 } |
| 8534 | 211 |
| 212 switch (what) | |
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213 { |
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214 case build_and_del: |
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215 case build: |
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216 if (i < SIZE) |
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217 { |
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218 if (tfind (x + j, (void *const *) root, cmp_fn) != NULL) |
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219 { |
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220 fputs ("Found element which is not in tree yet.\n", stdout); |
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221 error = 1; |
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222 } |
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223 elem = tsearch (x + j, root, cmp_fn); |
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224 if (elem == 0 |
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225 || tfind (x + j, (void *const *) root, cmp_fn) == NULL) |
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226 { |
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227 fputs ("Couldn't find element after it was added.\n", |
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228 stdout); |
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229 error = 1; |
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230 } |
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231 } |
| 8534 | 232 |
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233 if (what == build || i < lag) |
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234 break; |
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236 j = k; |
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237 /* fall through */ |
| 8534 | 238 |
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239 case delete: |
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240 elem = tfind (x + j, (void *const *) root, cmp_fn); |
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241 if (elem == NULL || tdelete (x + j, root, cmp_fn) == NULL) |
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242 { |
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243 fputs ("Error deleting element.\n", stdout); |
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244 error = 1; |
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245 } |
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246 break; |
| 8534 | 247 |
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248 case find: |
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249 if (tfind (x + j, (void *const *) root, cmp_fn) == NULL) |
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250 { |
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251 fputs ("Couldn't find element after it was added.\n", stdout); |
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252 error = 1; |
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253 } |
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254 break; |
| 8534 | 255 |
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256 } |
| 8534 | 257 } |
| 258 } | |
| 259 | |
| 260 | |
| 261 int | |
| 262 main (int argc, char **argv) | |
| 263 { | |
| 264 int total_error = 0; | |
| 265 static char state[8] = { 1, 2, 3, 4, 5, 6, 7, 8 }; | |
| 266 void *root = NULL; | |
| 267 int i, j; | |
| 268 | |
| 9943 | 269 #if HAVE_INITSTATE |
| 8534 | 270 initstate (SEED, state, 8); |
| 9943 | 271 #endif |
| 8534 | 272 |
| 273 for (i = 0; i < SIZE; ++i) | |
| 274 x[i] = i; | |
| 275 | |
| 276 /* Do this loop several times to get different permutations for the | |
| 277 random case. */ | |
| 278 fputs ("Series I\n", stdout); | |
| 279 for (i = 0; i < PASSES; ++i) | |
| 280 { | |
| 281 fprintf (stdout, "Pass %d... ", i + 1); | |
| 282 fflush (stdout); | |
| 283 error = 0; | |
| 284 | |
| 285 mangle_tree (ascending, build, &root, 0); | |
| 286 mangle_tree (ascending, find, &root, 0); | |
| 287 mangle_tree (descending, find, &root, 0); | |
| 288 mangle_tree (randomorder, find, &root, 0); | |
| 289 walk_tree (root, SIZE); | |
| 290 mangle_tree (ascending, delete, &root, 0); | |
| 291 | |
| 292 mangle_tree (ascending, build, &root, 0); | |
| 293 walk_tree (root, SIZE); | |
| 294 mangle_tree (descending, delete, &root, 0); | |
| 295 | |
| 296 mangle_tree (ascending, build, &root, 0); | |
| 297 walk_tree (root, SIZE); | |
| 298 mangle_tree (randomorder, delete, &root, 0); | |
| 299 | |
| 300 mangle_tree (descending, build, &root, 0); | |
| 301 mangle_tree (ascending, find, &root, 0); | |
| 302 mangle_tree (descending, find, &root, 0); | |
| 303 mangle_tree (randomorder, find, &root, 0); | |
| 304 walk_tree (root, SIZE); | |
| 305 mangle_tree (descending, delete, &root, 0); | |
| 306 | |
| 307 mangle_tree (descending, build, &root, 0); | |
| 308 walk_tree (root, SIZE); | |
| 309 mangle_tree (descending, delete, &root, 0); | |
| 310 | |
| 311 mangle_tree (descending, build, &root, 0); | |
| 312 walk_tree (root, SIZE); | |
| 313 mangle_tree (randomorder, delete, &root, 0); | |
| 314 | |
| 315 mangle_tree (randomorder, build, &root, 0); | |
| 316 mangle_tree (ascending, find, &root, 0); | |
| 317 mangle_tree (descending, find, &root, 0); | |
| 318 mangle_tree (randomorder, find, &root, 0); | |
| 319 walk_tree (root, SIZE); | |
| 320 mangle_tree (randomorder, delete, &root, 0); | |
| 321 | |
| 322 for (j = 1; j < SIZE; j *= 2) | |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
9943
diff
changeset
|
323 { |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
9943
diff
changeset
|
324 mangle_tree (randomorder, build_and_del, &root, j); |
|
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
9943
diff
changeset
|
325 } |
| 8534 | 326 |
| 327 fputs (error ? " failed!\n" : " ok.\n", stdout); | |
| 328 total_error |= error; | |
| 329 } | |
| 330 | |
| 331 fputs ("Series II\n", stdout); | |
| 332 for (i = 1; i < SIZE; i *= 2) | |
| 333 { | |
| 334 fprintf (stdout, "For size %d... ", i); | |
| 335 fflush (stdout); | |
| 336 error = 0; | |
| 337 | |
| 338 mangle_tree (ascending, build_and_del, &root, i); | |
| 339 mangle_tree (descending, build_and_del, &root, i); | |
| 340 mangle_tree (ascending, build_and_del, &root, i); | |
| 341 mangle_tree (descending, build_and_del, &root, i); | |
| 342 mangle_tree (ascending, build_and_del, &root, i); | |
| 343 mangle_tree (descending, build_and_del, &root, i); | |
| 344 mangle_tree (ascending, build_and_del, &root, i); | |
| 345 mangle_tree (descending, build_and_del, &root, i); | |
| 346 | |
| 347 fputs (error ? " failed!\n" : " ok.\n", stdout); | |
| 348 total_error |= error; | |
| 349 } | |
| 350 | |
| 351 return total_error; | |
| 352 } |