1 | /* |
---|
2 | * Copyright 1996, University Corporation for Atmospheric Research |
---|
3 | * See netcdf/COPYRIGHT file for copying and redistribution conditions. |
---|
4 | */ |
---|
5 | /* $Id: dim.c,v 1.83 2010/05/25 17:54:15 dmh Exp $ */ |
---|
6 | |
---|
7 | #include "nc.h" |
---|
8 | #include <stdlib.h> |
---|
9 | #include <string.h> |
---|
10 | #include <assert.h> |
---|
11 | #include "ncx.h" |
---|
12 | #include "fbits.h" |
---|
13 | #include "utf8proc.h" |
---|
14 | |
---|
15 | /* |
---|
16 | * Free dim |
---|
17 | * Formerly |
---|
18 | NC_free_dim(dim) |
---|
19 | */ |
---|
20 | void |
---|
21 | free_NC_dim(NC_dim *dimp) |
---|
22 | { |
---|
23 | if(dimp == NULL) |
---|
24 | return; |
---|
25 | free_NC_string(dimp->name); |
---|
26 | free(dimp); |
---|
27 | } |
---|
28 | |
---|
29 | |
---|
30 | NC_dim * |
---|
31 | new_x_NC_dim(NC_string *name) |
---|
32 | { |
---|
33 | NC_dim *dimp; |
---|
34 | |
---|
35 | dimp = (NC_dim *) malloc(sizeof(NC_dim)); |
---|
36 | if(dimp == NULL) |
---|
37 | return NULL; |
---|
38 | |
---|
39 | dimp->name = name; |
---|
40 | dimp->hash = hash_fast(name->cp, strlen(name->cp)); |
---|
41 | dimp->size = 0; |
---|
42 | |
---|
43 | return(dimp); |
---|
44 | } |
---|
45 | |
---|
46 | |
---|
47 | /* |
---|
48 | * Formerly |
---|
49 | NC_new_dim(const char *uname, long size) |
---|
50 | */ |
---|
51 | static NC_dim * |
---|
52 | new_NC_dim(const char *uname, size_t size) |
---|
53 | { |
---|
54 | NC_string *strp; |
---|
55 | NC_dim *dimp; |
---|
56 | |
---|
57 | char *name = (char *)utf8proc_NFC((const unsigned char *)uname); |
---|
58 | if(name == NULL) |
---|
59 | return NULL; |
---|
60 | strp = new_NC_string(strlen(name), name); |
---|
61 | free(name); |
---|
62 | if(strp == NULL) |
---|
63 | return NULL; |
---|
64 | |
---|
65 | dimp = new_x_NC_dim(strp); |
---|
66 | if(dimp == NULL) |
---|
67 | { |
---|
68 | free_NC_string(strp); |
---|
69 | return NULL; |
---|
70 | } |
---|
71 | |
---|
72 | dimp->size = size; |
---|
73 | |
---|
74 | return(dimp); |
---|
75 | } |
---|
76 | |
---|
77 | |
---|
78 | static NC_dim * |
---|
79 | dup_NC_dim(const NC_dim *dimp) |
---|
80 | { |
---|
81 | return new_NC_dim(dimp->name->cp, dimp->size); |
---|
82 | } |
---|
83 | |
---|
84 | /* |
---|
85 | * Step thru NC_DIMENSION array, seeking the UNLIMITED dimension. |
---|
86 | * Return dimid or -1 on not found. |
---|
87 | * *dimpp is set to the appropriate NC_dim. |
---|
88 | * The loop structure is odd. In order to parallelize, |
---|
89 | * we moved a clearer 'break' inside the loop body to the loop test. |
---|
90 | */ |
---|
91 | int |
---|
92 | find_NC_Udim(const NC_dimarray *ncap, NC_dim **dimpp) |
---|
93 | { |
---|
94 | assert(ncap != NULL); |
---|
95 | |
---|
96 | if(ncap->nelems == 0) |
---|
97 | return -1; |
---|
98 | |
---|
99 | { |
---|
100 | int dimid = 0; |
---|
101 | NC_dim **loc = ncap->value; |
---|
102 | |
---|
103 | for(; (size_t) dimid < ncap->nelems |
---|
104 | && (*loc)->size != NC_UNLIMITED; dimid++, loc++) |
---|
105 | { |
---|
106 | /*EMPTY*/ |
---|
107 | } |
---|
108 | if(dimid >= ncap->nelems) |
---|
109 | return(-1); /* not found */ |
---|
110 | /* else, normal return */ |
---|
111 | if(dimpp != NULL) |
---|
112 | *dimpp = *loc; |
---|
113 | return dimid; |
---|
114 | } |
---|
115 | } |
---|
116 | |
---|
117 | |
---|
118 | /* |
---|
119 | * Step thru NC_DIMENSION array, seeking match on uname. |
---|
120 | * Return dimid or -1 on not found. |
---|
121 | * *dimpp is set to the appropriate NC_dim. |
---|
122 | * The loop structure is odd. In order to parallelize, |
---|
123 | * we moved a clearer 'break' inside the loop body to the loop test. |
---|
124 | */ |
---|
125 | static int |
---|
126 | NC_finddim(const NC_dimarray *ncap, const char *uname, NC_dim **dimpp) |
---|
127 | { |
---|
128 | |
---|
129 | int dimid; |
---|
130 | uint32_t shash; |
---|
131 | NC_dim ** loc; |
---|
132 | char *name; |
---|
133 | |
---|
134 | assert(ncap != NULL); |
---|
135 | |
---|
136 | if(ncap->nelems == 0) |
---|
137 | return -1; |
---|
138 | |
---|
139 | { |
---|
140 | dimid = 0; |
---|
141 | loc = (NC_dim **) ncap->value; |
---|
142 | /* normalized version of uname */ |
---|
143 | name = (char *)utf8proc_NFC((const unsigned char *)uname); |
---|
144 | if(name == NULL) |
---|
145 | return NC_ENOMEM; |
---|
146 | shash = hash_fast(name, strlen(name)); |
---|
147 | |
---|
148 | for(; (size_t) dimid < ncap->nelems |
---|
149 | && ((*loc)->hash != shash |
---|
150 | || strncmp((*loc)->name->cp, name, strlen(name)) != 0); |
---|
151 | dimid++, loc++) |
---|
152 | { |
---|
153 | /*EMPTY*/ |
---|
154 | } |
---|
155 | free(name); |
---|
156 | if(dimid >= ncap->nelems) |
---|
157 | return(-1); /* not found */ |
---|
158 | /* else, normal return */ |
---|
159 | if(dimpp != NULL) |
---|
160 | *dimpp = *loc; |
---|
161 | return(dimid); |
---|
162 | } |
---|
163 | } |
---|
164 | |
---|
165 | |
---|
166 | /* dimarray */ |
---|
167 | |
---|
168 | |
---|
169 | /* |
---|
170 | * Free the stuff "in" (referred to by) an NC_dimarray. |
---|
171 | * Leaves the array itself allocated. |
---|
172 | */ |
---|
173 | void |
---|
174 | free_NC_dimarrayV0(NC_dimarray *ncap) |
---|
175 | { |
---|
176 | assert(ncap != NULL); |
---|
177 | |
---|
178 | if(ncap->nelems == 0) |
---|
179 | return; |
---|
180 | |
---|
181 | assert(ncap->value != NULL); |
---|
182 | |
---|
183 | { |
---|
184 | NC_dim **dpp = ncap->value; |
---|
185 | NC_dim *const *const end = &dpp[ncap->nelems]; |
---|
186 | for( /*NADA*/; dpp < end; dpp++) |
---|
187 | { |
---|
188 | free_NC_dim(*dpp); |
---|
189 | *dpp = NULL; |
---|
190 | } |
---|
191 | } |
---|
192 | ncap->nelems = 0; |
---|
193 | } |
---|
194 | |
---|
195 | |
---|
196 | /* |
---|
197 | * Free NC_dimarray values. |
---|
198 | * formerly |
---|
199 | NC_free_array() |
---|
200 | */ |
---|
201 | void |
---|
202 | free_NC_dimarrayV(NC_dimarray *ncap) |
---|
203 | { |
---|
204 | assert(ncap != NULL); |
---|
205 | |
---|
206 | if(ncap->nalloc == 0) |
---|
207 | return; |
---|
208 | |
---|
209 | assert(ncap->value != NULL); |
---|
210 | |
---|
211 | free_NC_dimarrayV0(ncap); |
---|
212 | |
---|
213 | free(ncap->value); |
---|
214 | ncap->value = NULL; |
---|
215 | ncap->nalloc = 0; |
---|
216 | } |
---|
217 | |
---|
218 | |
---|
219 | int |
---|
220 | dup_NC_dimarrayV(NC_dimarray *ncap, const NC_dimarray *ref) |
---|
221 | { |
---|
222 | int status = NC_NOERR; |
---|
223 | |
---|
224 | assert(ref != NULL); |
---|
225 | assert(ncap != NULL); |
---|
226 | |
---|
227 | if(ref->nelems != 0) |
---|
228 | { |
---|
229 | const size_t sz = ref->nelems * sizeof(NC_dim *); |
---|
230 | ncap->value = (NC_dim **) malloc(sz); |
---|
231 | if(ncap->value == NULL) |
---|
232 | return NC_ENOMEM; |
---|
233 | (void) memset(ncap->value, 0, sz); |
---|
234 | ncap->nalloc = ref->nelems; |
---|
235 | } |
---|
236 | |
---|
237 | ncap->nelems = 0; |
---|
238 | { |
---|
239 | NC_dim **dpp = ncap->value; |
---|
240 | const NC_dim **drpp = (const NC_dim **)ref->value; |
---|
241 | NC_dim *const *const end = &dpp[ref->nelems]; |
---|
242 | for( /*NADA*/; dpp < end; drpp++, dpp++, ncap->nelems++) |
---|
243 | { |
---|
244 | *dpp = dup_NC_dim(*drpp); |
---|
245 | if(*dpp == NULL) |
---|
246 | { |
---|
247 | status = NC_ENOMEM; |
---|
248 | break; |
---|
249 | } |
---|
250 | } |
---|
251 | } |
---|
252 | |
---|
253 | if(status != NC_NOERR) |
---|
254 | { |
---|
255 | free_NC_dimarrayV(ncap); |
---|
256 | return status; |
---|
257 | } |
---|
258 | |
---|
259 | assert(ncap->nelems == ref->nelems); |
---|
260 | |
---|
261 | return NC_NOERR; |
---|
262 | } |
---|
263 | |
---|
264 | |
---|
265 | /* |
---|
266 | * Add a new handle on the end of an array of handles |
---|
267 | * Formerly |
---|
268 | NC_incr_array(array, tail) |
---|
269 | */ |
---|
270 | static int |
---|
271 | incr_NC_dimarray(NC_dimarray *ncap, NC_dim *newelemp) |
---|
272 | { |
---|
273 | NC_dim **vp; |
---|
274 | |
---|
275 | assert(ncap != NULL); |
---|
276 | |
---|
277 | if(ncap->nalloc == 0) |
---|
278 | { |
---|
279 | assert(ncap->nelems == 0); |
---|
280 | vp = (NC_dim **) malloc(NC_ARRAY_GROWBY * sizeof(NC_dim *)); |
---|
281 | if(vp == NULL) |
---|
282 | return NC_ENOMEM; |
---|
283 | ncap->value = vp; |
---|
284 | ncap->nalloc = NC_ARRAY_GROWBY; |
---|
285 | } |
---|
286 | else if(ncap->nelems +1 > ncap->nalloc) |
---|
287 | { |
---|
288 | vp = (NC_dim **) realloc(ncap->value, |
---|
289 | (ncap->nalloc + NC_ARRAY_GROWBY) * sizeof(NC_dim *)); |
---|
290 | if(vp == NULL) |
---|
291 | return NC_ENOMEM; |
---|
292 | ncap->value = vp; |
---|
293 | ncap->nalloc += NC_ARRAY_GROWBY; |
---|
294 | } |
---|
295 | |
---|
296 | if(newelemp != NULL) |
---|
297 | { |
---|
298 | ncap->value[ncap->nelems] = newelemp; |
---|
299 | ncap->nelems++; |
---|
300 | } |
---|
301 | return NC_NOERR; |
---|
302 | } |
---|
303 | |
---|
304 | |
---|
305 | NC_dim * |
---|
306 | elem_NC_dimarray(const NC_dimarray *ncap, size_t elem) |
---|
307 | { |
---|
308 | assert(ncap != NULL); |
---|
309 | /* cast needed for braindead systems with signed size_t */ |
---|
310 | if(ncap->nelems == 0 || (unsigned long) elem >= ncap->nelems) |
---|
311 | return NULL; |
---|
312 | |
---|
313 | assert(ncap->value != NULL); |
---|
314 | |
---|
315 | return ncap->value[elem]; |
---|
316 | } |
---|
317 | |
---|
318 | |
---|
319 | /* Public */ |
---|
320 | |
---|
321 | int |
---|
322 | NC3_def_dim(int ncid, const char *name, size_t size, int *dimidp) |
---|
323 | { |
---|
324 | int status; |
---|
325 | NC *ncp; |
---|
326 | int dimid; |
---|
327 | NC_dim *dimp; |
---|
328 | |
---|
329 | status = NC_check_id(ncid, &ncp); |
---|
330 | if(status != NC_NOERR) |
---|
331 | return status; |
---|
332 | |
---|
333 | if(!NC_indef(ncp)) |
---|
334 | return NC_ENOTINDEFINE; |
---|
335 | |
---|
336 | status = NC_check_name(name); |
---|
337 | if(status != NC_NOERR) |
---|
338 | return status; |
---|
339 | |
---|
340 | if ((ncp->flags & NC_64BIT_OFFSET) && sizeof(off_t) > 4) { |
---|
341 | /* CDF2 format and LFS */ |
---|
342 | if(size > X_UINT_MAX - 3) /* "- 3" handles rounded-up size */ |
---|
343 | return NC_EDIMSIZE; |
---|
344 | } else { |
---|
345 | /* CDF1 format */ |
---|
346 | if(size > X_INT_MAX - 3) |
---|
347 | return NC_EDIMSIZE; |
---|
348 | } |
---|
349 | |
---|
350 | if(size == NC_UNLIMITED) |
---|
351 | { |
---|
352 | dimid = find_NC_Udim(&ncp->dims, &dimp); |
---|
353 | if(dimid != -1) |
---|
354 | { |
---|
355 | assert(dimid != -1); |
---|
356 | return NC_EUNLIMIT; |
---|
357 | } |
---|
358 | } |
---|
359 | |
---|
360 | if(ncp->dims.nelems >= NC_MAX_DIMS) |
---|
361 | return NC_EMAXDIMS; |
---|
362 | |
---|
363 | dimid = NC_finddim(&ncp->dims, name, &dimp); |
---|
364 | if(dimid != -1) |
---|
365 | return NC_ENAMEINUSE; |
---|
366 | |
---|
367 | dimp = new_NC_dim(name, size); |
---|
368 | if(dimp == NULL) |
---|
369 | return NC_ENOMEM; |
---|
370 | status = incr_NC_dimarray(&ncp->dims, dimp); |
---|
371 | if(status != NC_NOERR) |
---|
372 | { |
---|
373 | free_NC_dim(dimp); |
---|
374 | return status; |
---|
375 | } |
---|
376 | |
---|
377 | if(dimidp != NULL) |
---|
378 | *dimidp = (int)ncp->dims.nelems -1; |
---|
379 | return NC_NOERR; |
---|
380 | } |
---|
381 | |
---|
382 | |
---|
383 | int |
---|
384 | NC3_inq_dimid(int ncid, const char *name, int *dimid_ptr) |
---|
385 | { |
---|
386 | int status; |
---|
387 | NC *ncp; |
---|
388 | int dimid; |
---|
389 | |
---|
390 | status = NC_check_id(ncid, &ncp); |
---|
391 | if(status != NC_NOERR) |
---|
392 | return status; |
---|
393 | |
---|
394 | dimid = NC_finddim(&ncp->dims, name, NULL); |
---|
395 | |
---|
396 | if(dimid == -1) |
---|
397 | return NC_EBADDIM; |
---|
398 | |
---|
399 | if (dimid_ptr) |
---|
400 | *dimid_ptr = dimid; |
---|
401 | return NC_NOERR; |
---|
402 | } |
---|
403 | |
---|
404 | int |
---|
405 | NC3_inq_dim(int ncid, int dimid, char *name, size_t *sizep) |
---|
406 | { |
---|
407 | int status; |
---|
408 | NC *ncp; |
---|
409 | NC_dim *dimp; |
---|
410 | |
---|
411 | status = NC_check_id(ncid, &ncp); |
---|
412 | if(status != NC_NOERR) |
---|
413 | return status; |
---|
414 | |
---|
415 | dimp = elem_NC_dimarray(&ncp->dims, (size_t)dimid); |
---|
416 | if(dimp == NULL) |
---|
417 | return NC_EBADDIM; |
---|
418 | |
---|
419 | if(name != NULL) |
---|
420 | { |
---|
421 | (void)strncpy(name, dimp->name->cp, |
---|
422 | dimp->name->nchars); |
---|
423 | name[dimp->name->nchars] = 0; |
---|
424 | } |
---|
425 | if(sizep != NULL) |
---|
426 | { |
---|
427 | if(dimp->size == NC_UNLIMITED) |
---|
428 | *sizep = NC_get_numrecs(ncp); |
---|
429 | else |
---|
430 | *sizep = dimp->size; |
---|
431 | } |
---|
432 | return NC_NOERR; |
---|
433 | } |
---|
434 | |
---|
435 | int |
---|
436 | NC3_rename_dim( int ncid, int dimid, const char *unewname) |
---|
437 | { |
---|
438 | int status; |
---|
439 | NC *ncp; |
---|
440 | int existid; |
---|
441 | NC_dim *dimp; |
---|
442 | char *newname; /* normalized */ |
---|
443 | |
---|
444 | status = NC_check_id(ncid, &ncp); |
---|
445 | if(status != NC_NOERR) |
---|
446 | return status; |
---|
447 | |
---|
448 | if(NC_readonly(ncp)) |
---|
449 | return NC_EPERM; |
---|
450 | |
---|
451 | status = NC_check_name(unewname); |
---|
452 | if(status != NC_NOERR) |
---|
453 | return status; |
---|
454 | |
---|
455 | existid = NC_finddim(&ncp->dims, unewname, &dimp); |
---|
456 | if(existid != -1) |
---|
457 | return NC_ENAMEINUSE; |
---|
458 | |
---|
459 | dimp = elem_NC_dimarray(&ncp->dims, (size_t)dimid); |
---|
460 | if(dimp == NULL) |
---|
461 | return NC_EBADDIM; |
---|
462 | |
---|
463 | newname = (char *)utf8proc_NFC((const unsigned char *)unewname); |
---|
464 | if(newname == NULL) |
---|
465 | return NC_ENOMEM; |
---|
466 | if(NC_indef(ncp)) |
---|
467 | { |
---|
468 | NC_string *old = dimp->name; |
---|
469 | NC_string *newStr = new_NC_string(strlen(newname), newname); |
---|
470 | free(newname); |
---|
471 | if(newStr == NULL) |
---|
472 | return NC_ENOMEM; |
---|
473 | dimp->name = newStr; |
---|
474 | dimp->hash = hash_fast(newStr->cp, strlen(newStr->cp)); |
---|
475 | free_NC_string(old); |
---|
476 | return NC_NOERR; |
---|
477 | } |
---|
478 | |
---|
479 | /* else, not in define mode */ |
---|
480 | |
---|
481 | status = set_NC_string(dimp->name, newname); |
---|
482 | dimp->hash = hash_fast(newname, strlen(newname)); |
---|
483 | free(newname); |
---|
484 | if(status != NC_NOERR) |
---|
485 | return status; |
---|
486 | |
---|
487 | set_NC_hdirty(ncp); |
---|
488 | |
---|
489 | if(NC_doHsync(ncp)) |
---|
490 | { |
---|
491 | status = NC_sync(ncp); |
---|
492 | if(status != NC_NOERR) |
---|
493 | return status; |
---|
494 | } |
---|
495 | |
---|
496 | return NC_NOERR; |
---|
497 | } |
---|