Mercurial > octave-nkf
annotate liboctave/kpse.cc @ 10411:479cc8a0a846
use gnulib namespace
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 15 Mar 2010 15:57:23 -0400 |
| parents | 07ebe522dac2 |
| children | 6ccf1130f23c |
| rev | line source |
|---|---|
| 4399 | 1 // This file is not compiled to a separate object file. It is |
| 2 // included in pathsearch.cc. | |
| 3 | |
| 4 /* Look up a filename in a path. | |
| 4378 | 5 |
| 4385 | 6 Copyright (C) 1993, 94, 95, 96, 97, 98 Karl Berry. |
| 4378 | 7 Copyright (C) 1993, 94, 95, 96, 97 Karl Berry & O. Weber. |
| 4399 | 8 Copyright (C) 1992, 93, 94, 95, 96, 97 Free Software Foundation, Inc. |
| 4378 | 9 |
| 10 This library is free software; you can redistribute it and/or | |
| 11 modify it under the terms of the GNU Library General Public | |
| 12 License as published by the Free Software Foundation; either | |
| 7016 | 13 version 2 of the License, or (at your option) any later version. |
| 4378 | 14 |
| 15 This library is distributed in the hope that it will be useful, | |
| 16 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 Library General Public License for more details. | |
| 19 | |
| 20 You should have received a copy of the GNU Library General Public | |
| 21 License along with this library; if not, write to the Free Software | |
| 5307 | 22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 23 02110-1301, USA. */ | |
| 4378 | 24 |
| 25 #if defined (HAVE_CONFIG_H) | |
| 26 #include <config.h> | |
| 27 #endif | |
| 28 | |
| 4390 | 29 #include <map> |
| 4389 | 30 #include <string> |
| 31 | |
| 4399 | 32 /* System defines are for non-Unix systems only. (Testing for all Unix |
| 33 variations should be done in configure.) Presently the defines used | |
| 34 are: DOS OS2 WIN32. I do not use any of these systems | |
| 35 myself; if you do, I'd be grateful for any changes. --kb@mail.tug.org */ | |
| 36 | |
| 37 /* If we have either DOS or OS2, we are DOSISH. */ | |
| 38 #if defined (DOS) || defined (OS2) || defined (WIN32) || defined(__MSDOS__) | |
| 39 #define DOSISH | |
| 40 #endif | |
| 41 | |
| 42 #if defined (DOSISH) | |
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43 #define MONOCASE_FILENAMES /* case-insensitive filename comparisons */ |
| 4399 | 44 #endif |
| 45 | |
| 46 extern "C" { | |
| 47 #if defined(__MINGW32__) | |
| 48 #include <windows.h> | |
| 49 #include <fcntl.h> | |
| 50 #include <dirent.h> | |
| 51 #elif defined(WIN32) | |
| 52 #define __STDC__ 1 | |
| 6106 | 53 #ifndef _MSC_VER |
| 4399 | 54 #include "win32lib.h" |
| 6106 | 55 #endif |
| 4399 | 56 #endif /* not WIN32 */ |
| 57 | |
| 58 #ifdef __DJGPP__ | |
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59 #include <fcntl.h> /* for long filenames' stuff */ |
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60 #include <dir.h> /* for `getdisk' */ |
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61 #include <io.h> /* for `setmode' */ |
| 4399 | 62 #endif |
| 63 } | |
| 64 | |
| 65 /* Some drivers have partially integrated kpathsea changes. */ | |
| 66 #ifndef KPATHSEA | |
| 67 #define KPATHSEA 32 | |
| 68 #endif | |
| 69 | |
| 70 /* System dependencies that are figured out by `configure'. If we are | |
| 71 compiling standalone, we get our c-auto.h. Otherwise, the package | |
| 72 containing us must provide this (unless it can somehow generate ours | |
| 73 from c-auto.in). We use <...> instead of "..." so that the current | |
| 74 cpp directory (i.e., kpathsea/) won't be searched. */ | |
| 75 | |
| 76 /* If you want to find subdirectories in a directory with non-Unix | |
| 77 semantics (specifically, if a directory with no subdirectories does | |
| 5622 | 78 not have exactly two links), define this. */ |
| 79 #if defined(__DJGPP__) || ! defined (DOSISH) | |
| 4399 | 80 /* Surprise! DJGPP returns st_nlink exactly like on Unix. */ |
| 81 #define ST_NLINK_TRICK | |
| 82 #endif /* either not DOSISH or __DJGPP__ */ | |
| 83 | |
| 84 #ifdef OS2 | |
| 85 #define access ln_access | |
| 86 #define fopen ln_fopen | |
| 87 #define rename ln_rename | |
| 88 #define stat ln_stat | |
| 89 #endif /* OS2 */ | |
| 90 | |
| 4379 | 91 #include "kpse-xfns.h" |
| 4378 | 92 |
| 4396 | 93 #include "lo-error.h" |
| 4391 | 94 #include "oct-env.h" |
| 95 #include "oct-passwd.h" | |
| 4399 | 96 #include "str-vec.h" |
| 4385 | 97 |
| 98 /* Header files that essentially all of our sources need, and | |
| 99 that all implementations have. We include these first, to help with | |
| 100 NULL being defined multiple times. */ | |
| 101 #include <cstdio> | |
| 102 #include <cstdarg> | |
| 103 #include <cstdlib> | |
| 104 #include <climits> | |
| 105 #include <cerrno> | |
| 106 #include <cassert> | |
| 107 | |
| 108 #include <sys/types.h> | |
| 109 #include <unistd.h> | |
| 110 | |
| 111 #include "sysdir.h" | |
| 112 #include "statdefs.h" | |
| 113 | |
| 114 /* define NAME_MAX, the maximum length of a single | |
| 115 component in a filename. No such limit may exist, or may vary | |
| 116 depending on the filesystem. */ | |
| 117 | |
| 118 /* Most likely the system will truncate filenames if it is not POSIX, | |
| 119 and so we can use the BSD value here. */ | |
| 120 #ifndef _POSIX_NAME_MAX | |
| 121 #define _POSIX_NAME_MAX 255 | |
| 122 #endif | |
| 123 | |
| 124 #ifndef NAME_MAX | |
| 125 #define NAME_MAX _POSIX_NAME_MAX | |
| 126 #endif | |
| 127 | |
| 128 #include <cctype> | |
| 129 | |
| 130 /* What separates elements in environment variable path lists? */ | |
| 131 #ifndef ENV_SEP | |
| 5451 | 132 #if defined (SEPCHAR) && defined (SEPCHAR_STR) |
| 133 #define ENV_SEP SEPCHAR | |
| 134 #define ENV_SEP_STRING SEPCHAR_STR | |
| 135 #elif defined (DOSISH) | |
| 4385 | 136 #define ENV_SEP ';' |
| 137 #define ENV_SEP_STRING ";" | |
| 138 #else | |
| 139 #define ENV_SEP ':' | |
| 140 #define ENV_SEP_STRING ":" | |
| 141 #endif /* not DOS */ | |
| 142 #endif /* not ENV_SEP */ | |
| 143 | |
| 144 #ifndef IS_ENV_SEP | |
| 145 #define IS_ENV_SEP(ch) ((ch) == ENV_SEP) | |
| 146 #endif | |
| 147 | |
| 4399 | 148 /* define PATH_MAX, the maximum length of a filename. Since no such |
| 149 limit may exist, it's preferable to dynamically grow filenames as | |
| 150 needed. */ | |
| 4385 | 151 |
| 152 /* Cheat and define this as a manifest constant no matter what, instead | |
| 153 of using pathconf. I forget why we want to do this. */ | |
| 154 | |
| 155 #ifndef _POSIX_PATH_MAX | |
| 156 #define _POSIX_PATH_MAX 255 | |
| 157 #endif | |
| 158 | |
| 159 #ifndef PATH_MAX | |
| 160 #ifdef MAXPATHLEN | |
| 161 #define PATH_MAX MAXPATHLEN | |
| 162 #else | |
| 163 #define PATH_MAX _POSIX_PATH_MAX | |
| 164 #endif | |
| 165 #endif /* not PATH_MAX */ | |
| 166 | |
| 167 /* If NO_DEBUG is defined (not recommended), skip all this. */ | |
| 168 #ifndef NO_DEBUG | |
| 169 | |
| 170 /* OK, we'll have tracing support. */ | |
| 171 #define KPSE_DEBUG | |
| 172 | |
| 173 /* Test if a bit is on. */ | |
| 174 #define KPSE_DEBUG_P(bit) (kpathsea_debug & (1 << (bit))) | |
| 175 | |
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176 #define KPSE_DEBUG_STAT 0 /* stat calls */ |
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177 #define KPSE_DEBUG_HASH 1 /* hash lookups */ |
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178 #define KPSE_DEBUG_FOPEN 2 /* fopen/fclose calls */ |
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179 #define KPSE_DEBUG_PATHS 3 /* search path initializations */ |
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180 #define KPSE_DEBUG_EXPAND 4 /* path element expansion */ |
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181 #define KPSE_DEBUG_SEARCH 5 /* searches */ |
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182 #define KPSE_DEBUG_VARS 6 /* variable values */ |
| 4385 | 183 #define KPSE_LAST_DEBUG KPSE_DEBUG_VARS |
| 184 | |
| 185 /* A printf for the debugging. */ | |
| 10411 | 186 #define DEBUGF_START() do { gnulib::fputs ("kdebug:", stderr) |
| 4385 | 187 #define DEBUGF_END() fflush (stderr); } while (0) |
| 188 | |
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189 #define DEBUGF(str) \ |
| 10411 | 190 DEBUGF_START (); gnulib::fputs (str, stderr); DEBUGF_END () |
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191 #define DEBUGF1(str, e1) \ |
| 10411 | 192 DEBUGF_START (); gnulib::fprintf (stderr, str, e1); DEBUGF_END () |
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193 #define DEBUGF2(str, e1, e2) \ |
| 10411 | 194 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2); DEBUGF_END () |
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195 #define DEBUGF3(str, e1, e2, e3) \ |
| 10411 | 196 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3); DEBUGF_END () |
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197 #define DEBUGF4(str, e1, e2, e3, e4) \ |
| 10411 | 198 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3, e4); DEBUGF_END () |
| 4385 | 199 |
| 200 #undef fopen | |
| 201 #define fopen kpse_fopen_trace | |
| 4399 | 202 static FILE *fopen (const char *filename, const char *mode); |
| 4385 | 203 |
| 204 #endif /* not NO_DEBUG */ | |
| 205 | |
| 4399 | 206 #ifdef KPSE_DEBUG |
| 207 static unsigned int kpathsea_debug = 0; | |
| 208 #endif | |
| 209 | |
| 4385 | 210 #if defined (WIN32) && !defined (__MINGW32__) |
| 211 | |
| 212 /* System description file for Windows NT. */ | |
| 213 | |
| 214 /* | |
| 215 * Define symbols to identify the version of Unix this is. | |
| 216 * Define all the symbols that apply correctly. | |
| 217 */ | |
| 218 | |
| 219 #ifndef DOSISH | |
| 220 #define DOSISH | |
| 221 #endif | |
| 222 | |
| 223 #ifndef MAXPATHLEN | |
| 224 #define MAXPATHLEN _MAX_PATH | |
| 4378 | 225 #endif |
| 226 | |
| 4385 | 227 /* These have to be defined because our compilers treat __STDC__ as being |
| 228 defined (most of them anyway). */ | |
| 229 | |
| 230 #define access _access | |
| 231 #define stat _stat | |
| 232 #define strdup _strdup | |
| 233 | |
| 234 #define S_IFMT _S_IFMT | |
| 235 #define S_IFDIR _S_IFDIR | |
| 236 | |
| 237 /* Define this so that winsock.h definitions don't get included when | |
| 238 windows.h is... For this to have proper effect, config.h must | |
| 4391 | 239 always be included before windows.h. */ |
| 4385 | 240 #define _WINSOCKAPI_ 1 |
| 241 | |
| 242 #include <windows.h> | |
| 243 | |
| 244 /* For proper declaration of environ. */ | |
| 245 #include <io.h> | |
| 246 #include <fcntl.h> | |
| 247 #include <process.h> | |
| 248 | |
| 249 /* ============================================================ */ | |
| 250 | |
| 251 #endif /* WIN32 */ | |
| 252 | |
| 253 /* Define common sorts of messages. */ | |
| 254 | |
| 255 /* This should be called only after a system call fails. Don't exit | |
| 256 with status `errno', because that might be 256, which would mean | |
| 257 success (exit statuses are truncated to eight bits). */ | |
| 4396 | 258 #define FATAL_PERROR(str) \ |
| 259 do \ | |
| 260 { \ | |
| 10411 | 261 gnulib::fputs ("pathsearch: ", stderr); \ |
| 4396 | 262 perror (str); exit (EXIT_FAILURE); \ |
| 263 } \ | |
| 264 while (0) | |
| 265 | |
| 266 #define FATAL(str) \ | |
| 267 do \ | |
| 268 { \ | |
| 10411 | 269 gnulib::fputs ("pathsearch: fatal: ", stderr); \ |
| 270 gnulib::fputs (str, stderr); \ | |
| 271 gnulib::fputs (".\n", stderr); \ | |
| 4396 | 272 exit (1); \ |
| 273 } \ | |
| 274 while (0) | |
| 4385 | 275 |
| 4386 | 276 #ifndef WIN32 |
| 4385 | 277 static void xclosedir (DIR *d); |
| 4386 | 278 #endif |
| 4385 | 279 |
| 4399 | 280 /* It's a little bizarre to be using the same type for the list and the |
| 281 elements of the list, but no reason not to in this case, I think -- | |
| 282 we never need a NULL string in the middle of the list, and an extra | |
| 283 NULL/NULL element always at the end is inconsequential. */ | |
| 284 | |
| 285 struct str_llist_elt | |
| 286 { | |
| 287 std::string str; | |
| 288 int moved; | |
| 289 struct str_llist_elt *next; | |
| 290 }; | |
| 291 | |
| 292 typedef str_llist_elt str_llist_elt_type; | |
| 293 typedef str_llist_elt *str_llist_type; | |
| 294 | |
| 295 #define STR_LLIST(sl) ((sl).str) | |
| 296 #define STR_LLIST_MOVED(sl) ((sl).moved) | |
| 297 #define STR_LLIST_NEXT(sl) ((sl).next) | |
| 298 | |
| 4390 | 299 static void str_llist_add (str_llist_type *l, const std::string& str); |
| 4385 | 300 |
| 301 static void str_llist_float (str_llist_type *l, str_llist_elt_type *mover); | |
| 302 | |
| 4389 | 303 static std::string kpse_var_expand (const std::string& src); |
| 4385 | 304 |
| 4399 | 305 static str_llist_type *kpse_element_dirs (const std::string& elt); |
| 306 | |
| 307 static std::string kpse_expand (const std::string& s); | |
| 308 | |
| 309 static std::string kpse_expand_default (const std::string& path, | |
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310 const std::string& dflt); |
| 4399 | 311 |
| 312 static string_vector kpse_db_search (const std::string& name, | |
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313 const std::string& path_elt, bool all); |
| 4399 | 314 |
| 4385 | 315 #include <ctime> /* for `time' */ |
| 316 | |
| 4399 | 317 static bool |
| 4394 | 318 kpse_is_env_sep (char c) |
| 319 { | |
| 320 return IS_ENV_SEP (c); | |
| 321 } | |
| 322 | |
| 4392 | 323 /* These routines just check the return status from standard library |
| 324 routines and abort if an error happens. */ | |
| 325 | |
| 326 static FILE * | |
| 4393 | 327 xfopen (const std::string& filename, const char *mode) |
| 4392 | 328 { |
| 329 FILE *f; | |
| 330 | |
| 4393 | 331 assert (! filename.empty () && mode); |
| 332 | |
| 333 f = fopen (filename.c_str (), mode); | |
| 334 | |
| 335 if (! f) | |
| 336 FATAL_PERROR (filename.c_str ()); | |
| 4392 | 337 |
| 338 return f; | |
| 339 } | |
| 340 | |
| 341 /* A single (key,value) pair. */ | |
| 342 | |
| 343 struct hash_element_type | |
| 344 { | |
| 345 std::string key; | |
| 346 std::string value; | |
| 347 struct hash_element_type *next; | |
| 348 }; | |
| 349 | |
| 350 /* The usual arrangement of buckets initialized to null. */ | |
| 351 | |
| 352 struct hash_table_type | |
| 353 { | |
| 354 hash_element_type **buckets; | |
| 355 unsigned size; | |
| 356 }; | |
| 357 | |
| 358 static unsigned | |
| 5764 | 359 kpse_hash (hash_table_type table, const std::string& key) |
| 4392 | 360 { |
| 361 unsigned n = 0; | |
| 362 | |
| 363 /* Our keys aren't often anagrams of each other, so no point in | |
| 364 weighting the characters. */ | |
| 365 size_t len = key.length (); | |
| 366 for (size_t i = 0; i < len; i++) | |
| 4394 | 367 n = (n + n + key[i]) % table.size; |
| 4392 | 368 |
| 369 return n; | |
| 370 } | |
| 371 | |
| 372 /* Look up STR in MAP. Return a (dynamically-allocated) list of the | |
| 373 corresponding strings or NULL if no match. */ | |
| 374 | |
| 375 static string_vector | |
| 376 hash_lookup (hash_table_type table, const std::string& key) | |
| 377 { | |
| 378 hash_element_type *p; | |
| 379 string_vector ret; | |
| 5764 | 380 unsigned n = kpse_hash (table, key); |
| 4392 | 381 |
| 382 /* Look at everything in this bucket. */ | |
| 4398 | 383 for (p = table.buckets[n]; p; p = p->next) |
| 4394 | 384 if (key == p->key) |
| 4392 | 385 ret.append (p->value); |
| 386 | |
| 387 #ifdef KPSE_DEBUG | |
| 388 if (KPSE_DEBUG_P (KPSE_DEBUG_HASH)) | |
| 389 { | |
| 390 DEBUGF1 ("hash_lookup (%s) =>", key.c_str ()); | |
| 391 if (ret.empty ()) | |
| 10411 | 392 gnulib::fputs (" (nil)\n", stderr); |
| 4392 | 393 else |
| 394 { | |
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395 int len = ret.length (); |
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396 for (int i = 0; i < len; i++) |
| 4392 | 397 { |
| 10411 | 398 gnulib::putc (' ', stderr); |
| 399 gnulib::fputs (ret[i].c_str (), stderr); | |
| 4392 | 400 } |
| 10411 | 401 gnulib::putc ('\n', stderr); |
| 4392 | 402 } |
| 403 fflush (stderr); | |
| 404 } | |
| 405 #endif | |
| 406 | |
| 407 return ret; | |
| 408 } | |
| 409 | |
| 4399 | 410 /* A way to step through a path, extracting one directory name at a |
| 411 time. */ | |
| 412 | |
| 413 class kpse_path_iterator | |
| 414 { | |
| 415 public: | |
| 416 | |
| 417 kpse_path_iterator (const std::string& p) | |
| 418 : path (p), b (0), e (0), len (path.length ()) { set_end (); } | |
| 419 | |
| 420 kpse_path_iterator (const kpse_path_iterator& pi) | |
| 421 : path (pi.path), b (pi.b), e (pi.e), len (pi.len) { } | |
| 422 | |
| 423 kpse_path_iterator operator ++ (int) | |
| 424 { | |
| 425 kpse_path_iterator retval (*this); | |
| 426 next (); | |
| 427 return retval; | |
| 428 } | |
| 429 | |
| 430 std::string operator * (void) { return path.substr (b, e-b); } | |
| 431 | |
| 432 bool operator != (const size_t sz) { return b != sz; } | |
| 433 | |
| 434 private: | |
| 435 | |
| 436 const std::string& path; | |
| 437 size_t b; | |
| 438 size_t e; | |
| 439 size_t len; | |
| 440 | |
| 441 void set_end (void) | |
| 442 { | |
| 443 e = b + 1; | |
| 444 | |
| 4412 | 445 if (e == len) |
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446 ; /* OK, we have found the last element. */ |
| 4412 | 447 else if (e > len) |
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448 b = e = std::string::npos; |
| 4399 | 449 else |
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450 { |
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451 /* Find the next colon not enclosed by braces (or the end of |
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452 the path). */ |
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453 |
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454 int brace_level = 0; |
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455 while (e < len && ! (brace_level == 0 && kpse_is_env_sep (path[e]))) |
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456 e++; |
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457 } |
| 4399 | 458 } |
| 459 | |
| 460 void next (void) | |
| 461 { | |
| 462 b = e + 1; | |
| 463 | |
| 4412 | 464 /* Skip any consecutive colons. */ |
| 5618 | 465 while (b < len && kpse_is_env_sep (path[b])) |
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466 b++; |
| 4412 | 467 |
| 4399 | 468 if (b >= len) |
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469 b = e = std::string::npos; |
| 4399 | 470 else |
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471 set_end (); |
| 4399 | 472 } |
| 5617 | 473 |
| 474 // No assignment. | |
| 475 kpse_path_iterator& operator = (const kpse_path_iterator&); | |
| 4399 | 476 }; |
| 477 | |
| 4391 | 478 /* Here's the simple one, when a program just wants a value. */ |
| 479 | |
| 480 static std::string | |
| 481 kpse_var_value (const std::string& var) | |
| 482 { | |
| 483 std::string ret; | |
| 484 | |
| 485 std::string tmp = octave_env::getenv (var); | |
| 486 | |
| 487 if (! tmp.empty ()) | |
| 488 ret = kpse_var_expand (tmp); | |
| 489 | |
| 490 #ifdef KPSE_DEBUG | |
| 491 if (KPSE_DEBUG_P (KPSE_DEBUG_VARS)) | |
| 492 DEBUGF2 ("variable: %s = %s\n", var.c_str (), | |
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493 tmp.empty () ? "(nil)" : tmp.c_str ()); |
| 4391 | 494 #endif |
| 495 | |
| 496 return ret; | |
| 497 } | |
| 498 | |
| 499 /* Truncate any too-long components in NAME, returning the result. It's | |
| 500 too bad this is necessary. See comments in readable.c for why. */ | |
| 501 | |
| 4393 | 502 static std::string |
| 503 kpse_truncate_filename (const std::string& name) | |
| 4391 | 504 { |
| 505 unsigned c_len = 0; /* Length of current component. */ | |
| 506 unsigned ret_len = 0; /* Length of constructed result. */ | |
| 507 | |
| 4393 | 508 std::string ret = name; |
| 509 | |
| 510 size_t len = name.length (); | |
| 511 | |
| 512 for (size_t i = 0; i < len; i++) | |
| 4391 | 513 { |
| 4393 | 514 if (IS_DIR_SEP (name[i]) || IS_DEVICE_SEP (name[i])) |
| 4391 | 515 { |
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516 /* At a directory delimiter, reset component length. */ |
| 4391 | 517 c_len = 0; |
| 518 } | |
| 519 else if (c_len > NAME_MAX) | |
| 520 { | |
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521 /* If past the max for a component, ignore this character. */ |
| 4391 | 522 continue; |
| 523 } | |
| 524 | |
| 525 /* Copy this character. */ | |
| 4393 | 526 ret[ret_len++] = name[i]; |
| 4391 | 527 c_len++; |
| 528 } | |
| 529 | |
| 4393 | 530 ret.resize (ret_len); |
| 4391 | 531 |
| 532 return ret; | |
| 533 } | |
| 534 | |
| 535 /* If access can read FN, run stat (assigning to stat buffer ST) and | |
| 536 check that fn is not a directory. Don't check for just being a | |
| 537 regular file, as it is potentially useful to read fifo's or some | |
| 538 kinds of devices. */ | |
| 539 | |
| 540 #ifdef WIN32 | |
| 541 static inline bool | |
| 4393 | 542 READABLE (const std::string& fn, struct stat&) |
| 4391 | 543 { |
| 4393 | 544 const char *t = fn.c_str (); |
| 545 return (GetFileAttributes (t) != 0xFFFFFFFF | |
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546 && ! (GetFileAttributes (t) & FILE_ATTRIBUTE_DIRECTORY)); |
| 4391 | 547 } |
| 548 #else | |
| 549 static inline bool | |
| 4393 | 550 READABLE (const std::string& fn, struct stat& st) |
| 4391 | 551 { |
| 4393 | 552 const char *t = fn.c_str (); |
| 553 return (access (t, R_OK) == 0 | |
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554 && stat (t, &(st)) == 0 && ! S_ISDIR (st.st_mode)); |
| 4391 | 555 } |
| 556 #endif | |
| 557 | |
| 558 /* POSIX invented the brain-damage of not necessarily truncating | |
| 559 filename components; the system's behavior is defined by the value of | |
| 560 the symbol _POSIX_NO_TRUNC, but you can't change it dynamically! | |
| 561 | |
| 562 Generic const return warning. See extend-fname.c. */ | |
| 563 | |
| 4393 | 564 static std::string |
| 565 kpse_readable_file (const std::string& name) | |
| 4391 | 566 { |
| 567 struct stat st; | |
| 4393 | 568 std::string ret; |
| 4391 | 569 |
| 570 if (READABLE (name, st)) | |
| 571 { | |
| 4393 | 572 ret = name; |
| 4391 | 573 |
| 574 #ifdef ENAMETOOLONG | |
| 575 } | |
| 576 else if (errno == ENAMETOOLONG) | |
| 577 { | |
| 578 ret = kpse_truncate_filename (name); | |
| 579 | |
| 580 /* Perhaps some other error will occur with the truncated name, | |
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581 so let's call access again. */ |
| 4391 | 582 |
| 583 if (! READABLE (ret, st)) | |
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584 { |
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585 /* Failed. */ |
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586 ret = std::string (); |
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587 } |
| 4391 | 588 #endif /* ENAMETOOLONG */ |
| 589 | |
| 590 } | |
| 591 else | |
| 592 { | |
| 593 /* Some other error. */ | |
| 594 if (errno == EACCES) | |
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595 { |
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596 /* Maybe warn them if permissions are bad. */ |
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597 perror (name.c_str ()); |
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598 } |
| 4393 | 599 |
| 600 ret = std::string (); | |
| 4391 | 601 } |
| 602 | |
| 603 return ret; | |
| 604 } | |
| 605 | |
| 606 /* Sorry this is such a system-dependent mess, but I can't see any way | |
| 607 to usefully generalize. */ | |
| 608 | |
| 609 static bool | |
| 610 kpse_absolute_p (const std::string& filename, int relative_ok) | |
| 611 { | |
| 612 size_t len = filename.length (); | |
| 613 | |
| 4409 | 614 int absolute = (len > 0 && IS_DIR_SEP (filename[0])) |
| 4391 | 615 #ifdef DOSISH |
| 616 /* Novell allows non-alphanumeric drive letters. */ | |
| 4409 | 617 || (len > 0 && IS_DEVICE_SEP (filename[1])) |
| 4391 | 618 #endif /* DOSISH */ |
| 619 #ifdef WIN32 | |
| 620 /* UNC names */ | |
| 4409 | 621 || (len > 1 && filename[0] == '\\' && filename[1] == '\\') |
| 4391 | 622 #endif |
| 4409 | 623 ; |
| 624 | |
| 4391 | 625 int explicit_relative |
| 626 = relative_ok | |
| 627 && (len > 1 | |
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628 && filename[0] == '.' |
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629 && (IS_DIR_SEP (filename[1]) |
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630 || (len > 2 && filename[1] == '.' && IS_DIR_SEP (filename[2])))); |
| 4391 | 631 |
| 632 return absolute || explicit_relative; | |
| 633 } | |
| 634 | |
| 4378 | 635 /* The very first search is for texmf.cnf, called when someone tries to |
| 636 initialize the TFM path or whatever. init_path calls kpse_cnf_get | |
| 637 which calls kpse_all_path_search to find all the texmf.cnf's. We | |
| 638 need to do various special things in this case, since we obviously | |
| 639 don't yet have the configuration files when we're searching for the | |
| 640 configuration files. */ | |
| 641 static bool first_search = true; | |
| 642 | |
| 643 /* This function is called after every search (except the first, since | |
| 644 we definitely want to allow enabling the logging in texmf.cnf) to | |
| 645 record the filename(s) found in $TEXMFLOG. */ | |
| 646 | |
| 647 static void | |
| 4391 | 648 log_search (const string_vector& filenames) |
| 4378 | 649 { |
| 4398 | 650 static FILE *log_file = 0; |
| 4378 | 651 static bool first_time = true; /* Need to open the log file? */ |
| 4391 | 652 |
| 653 if (first_time) | |
| 654 { | |
| 655 first_time = false; | |
| 656 | |
| 657 /* Get name from either envvar or config file. */ | |
| 658 std::string log_name = kpse_var_value ("TEXMFLOG"); | |
| 659 | |
| 660 if (! log_name.empty ()) | |
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661 { |
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662 log_file = xfopen (log_name.c_str (), "a"); |
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663 |
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664 if (! log_file) |
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665 perror (log_name.c_str ()); |
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666 } |
| 4378 | 667 } |
| 4391 | 668 |
| 669 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH) || log_file) | |
| 670 { | |
| 671 /* FILENAMES should never be null, but safety doesn't hurt. */ | |
| 672 for (int e = 0; e < filenames.length () && ! filenames[e].empty (); e++) | |
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673 { |
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674 std::string filename = filenames[e]; |
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675 |
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676 /* Only record absolute filenames, for privacy. */ |
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677 if (log_file && kpse_absolute_p (filename.c_str (), false)) |
| 10411 | 678 gnulib::fprintf (log_file, "%lu %s\n", |
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679 static_cast<unsigned long> (time (0)), |
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680 filename.c_str ()); |
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681 |
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682 /* And show them online, if debugging. We've already started |
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683 the debugging line in `search', where this is called, so |
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684 just print the filename here, don't use DEBUGF. */ |
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685 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 10411 | 686 gnulib::fputs (filename.c_str (), stderr); |
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687 } |
| 4378 | 688 } |
| 689 } | |
| 4392 | 690 |
| 4378 | 691 /* Concatenate each element in DIRS with NAME (assume each ends with a |
| 692 /, to save time). If SEARCH_ALL is false, return the first readable | |
| 693 regular file. Else continue to search for more. In any case, if | |
| 694 none, return a list containing just NULL. | |
| 695 | |
| 696 We keep a single buffer for the potential filenames and reallocate | |
| 697 only when necessary. I'm not sure it's noticeably faster, but it | |
| 698 does seem cleaner. (We do waste a bit of space in the return | |
| 699 value, though, since we don't shrink it to the final size returned.) */ | |
| 700 | |
| 4390 | 701 static string_vector |
| 702 dir_list_search (str_llist_type *dirs, const std::string& name, | |
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703 bool search_all) |
| 4378 | 704 { |
| 705 str_llist_elt_type *elt; | |
| 4390 | 706 string_vector ret; |
| 4378 | 707 |
| 708 for (elt = *dirs; elt; elt = STR_LLIST_NEXT (*elt)) | |
| 709 { | |
| 4390 | 710 const std::string dir = STR_LLIST (*elt); |
| 4393 | 711 |
| 712 std::string potential = dir + name; | |
| 713 | |
| 714 std::string tmp = kpse_readable_file (potential); | |
| 715 | |
| 716 if (! tmp.empty ()) | |
| 4378 | 717 { |
| 4393 | 718 ret.append (potential); |
| 4391 | 719 |
| 4378 | 720 /* Move this element towards the top of the list. */ |
| 721 str_llist_float (dirs, elt); | |
| 4391 | 722 |
| 723 if (! search_all) | |
| 4378 | 724 return ret; |
| 725 } | |
| 726 } | |
| 4391 | 727 |
| 4378 | 728 return ret; |
| 729 } | |
| 4392 | 730 |
| 4378 | 731 /* This is called when NAME is absolute or explicitly relative; if it's |
| 732 readable, return (a list containing) it; otherwise, return NULL. */ | |
| 733 | |
| 4390 | 734 static string_vector |
| 4393 | 735 absolute_search (const std::string& name) |
| 4378 | 736 { |
| 4390 | 737 string_vector ret_list; |
| 4393 | 738 std::string found = kpse_readable_file (name); |
| 4391 | 739 |
| 4378 | 740 /* Add `found' to the return list even if it's null; that tells |
| 741 the caller we didn't find anything. */ | |
| 4394 | 742 ret_list.append (found); |
| 4391 | 743 |
| 4378 | 744 return ret_list; |
| 745 } | |
| 4392 | 746 |
| 4378 | 747 /* This is the hard case -- look for NAME in PATH. If ALL is false, |
| 748 return the first file found. Otherwise, search all elements of PATH. */ | |
| 749 | |
| 4390 | 750 static string_vector |
| 4394 | 751 path_search (const std::string& path, const std::string& name, |
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752 bool /* must_exist */, bool all) |
| 4378 | 753 { |
| 4390 | 754 string_vector ret_list; |
| 4378 | 755 bool done = false; |
| 4390 | 756 |
| 8021 | 757 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4390 | 758 { |
| 4394 | 759 std::string elt = *pi; |
| 760 | |
| 4390 | 761 string_vector found; |
| 762 bool allow_disk_search = true; | |
| 763 | |
| 4394 | 764 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
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765 { |
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766 /* Those magic leading chars in a path element means don't |
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767 search the disk for this elt. And move past the magic to |
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768 get to the name. */ |
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769 allow_disk_search = false; |
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770 elt = elt.substr (2); |
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771 } |
| 4390 | 772 |
| 773 /* Do not touch the device if present */ | |
| 774 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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775 { |
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776 while (elt.length () > 3 |
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777 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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778 { |
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779 elt[2] = elt[1]; |
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780 elt[1] = elt[0]; |
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781 elt = elt.substr (1); |
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782 } |
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783 } |
| 4390 | 784 else |
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785 { |
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786 /* We never want to search the whole disk. */ |
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787 while (elt.length () > 1 |
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788 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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789 elt = elt.substr (1); |
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790 } |
| 4391 | 791 |
| 4390 | 792 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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793 (search), also tests first_search, and does the resetting. */ |
| 4390 | 794 found = first_search |
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795 ? string_vector () : kpse_db_search (name, elt, all); |
| 4390 | 796 |
| 797 /* Search the filesystem if (1) the path spec allows it, and either | |
| 4378 | 798 (2a) we are searching for texmf.cnf ; or |
| 4391 | 799 (2b) no db exists; or |
| 4378 | 800 (2c) no db's are relevant to this elt; or |
| 801 (3) MUST_EXIST && NAME was not in the db. | |
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802 In (2*), `found' will be NULL. |
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803 In (3), `found' will be an empty list. */ |
| 4390 | 804 |
| 805 if (allow_disk_search && found.empty ()) | |
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806 { |
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807 str_llist_type *dirs = kpse_element_dirs (elt); |
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808 |
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809 if (dirs && *dirs) |
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810 found = dir_list_search (dirs, name, all); |
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811 } |
| 4390 | 812 |
| 813 /* Did we find anything anywhere? */ | |
| 814 if (! found.empty ()) | |
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815 { |
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816 if (all) |
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817 ret_list.append (found); |
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818 else |
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819 { |
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820 ret_list.append (found[0]); |
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821 done = true; |
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822 } |
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823 } |
| 4378 | 824 } |
| 825 | |
| 826 return ret_list; | |
| 4390 | 827 } |
| 4392 | 828 |
| 4378 | 829 /* Search PATH for ORIGINAL_NAME. If ALL is false, or ORIGINAL_NAME is |
| 830 absolute_p, check ORIGINAL_NAME itself. Otherwise, look at each | |
| 831 element of PATH for the first readable ORIGINAL_NAME. | |
| 4391 | 832 |
| 4378 | 833 Always return a list; if no files are found, the list will |
| 834 contain just NULL. If ALL is true, the list will be | |
| 835 terminated with NULL. */ | |
| 836 | |
| 4390 | 837 static string_vector |
| 838 search (const std::string& path, const std::string& original_name, | |
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839 bool must_exist, bool all) |
| 4378 | 840 { |
| 4390 | 841 string_vector ret_list; |
| 4378 | 842 bool absolute_p; |
| 843 | |
| 844 /* Make a leading ~ count as an absolute filename, and expand $FOO's. */ | |
| 4390 | 845 std::string name = kpse_expand (original_name); |
| 4391 | 846 |
| 4378 | 847 /* If the first name is absolute or explicitly relative, no need to |
| 848 consider PATH at all. */ | |
| 849 absolute_p = kpse_absolute_p (name, true); | |
| 4391 | 850 |
| 4378 | 851 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 4391 | 852 DEBUGF4 ("start search (file=%s, must_exist=%d, find_all=%d, path=%s).\n", |
| 4390 | 853 name.c_str (), must_exist, all, path.c_str ()); |
| 4378 | 854 |
| 855 /* Find the file(s). */ | |
| 856 ret_list = absolute_p ? absolute_search (name) | |
| 857 : path_search (path, name, must_exist, all); | |
| 4391 | 858 |
| 4378 | 859 /* The very first search is for texmf.cnf. We can't log that, since |
| 860 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 861 if (first_search) |
| 862 { | |
| 863 first_search = false; | |
| 864 } | |
| 865 else | |
| 866 { | |
| 867 /* Record the filenames we found, if desired. And wrap them in a | |
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868 debugging line if we're doing that. */ |
| 4391 | 869 |
| 870 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
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871 DEBUGF1 ("search (%s) =>", original_name.c_str ()); |
| 4391 | 872 |
| 873 log_search (ret_list); | |
| 874 | |
| 875 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 876 gnulib::putc ('\n', stderr); |
| 4391 | 877 } |
| 4378 | 878 |
| 4390 | 879 return ret_list; |
| 4378 | 880 } |
| 4392 | 881 |
| 4378 | 882 /* Search PATH for the first NAME. */ |
| 883 | |
| 4399 | 884 /* Call `kpse_expand' on NAME. If the result is an absolute or |
| 885 explicitly relative filename, check whether it is a readable | |
| 886 (regular) file. | |
| 887 | |
| 888 Otherwise, look in each of the directories specified in PATH (also do | |
| 889 tilde and variable expansion on elements in PATH), using a prebuilt | |
| 890 db (see db.h) if it's relevant for a given path element. | |
| 891 | |
| 892 If the prebuilt db doesn't exist, or if MUST_EXIST is true and NAME | |
| 893 isn't found in the prebuilt db, look on the filesystem. (I.e., if | |
| 894 MUST_EXIST is false, and NAME isn't found in the db, do *not* look on | |
| 895 the filesystem.) | |
| 896 | |
| 897 The caller must expand PATH. This is because it makes more sense to | |
| 898 do this once, in advance, instead of for every search using it. | |
| 899 | |
| 900 In any case, return the complete filename if found, otherwise NULL. */ | |
| 901 | |
| 902 static std::string | |
| 4390 | 903 kpse_path_search (const std::string& path, const std::string& name, |
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904 bool must_exist) |
| 4378 | 905 { |
| 4390 | 906 string_vector ret_list = search (path, name, must_exist, false); |
| 907 | |
| 908 return ret_list.empty () ? std::string () : ret_list[0]; | |
| 4378 | 909 } |
| 910 | |
| 911 /* Search all elements of PATH for files named NAME. Not sure if it's | |
| 912 right to assert `must_exist' here, but it suffices now. */ | |
| 913 | |
| 4399 | 914 /* Like `kpse_path_search' with MUST_EXIST true, but return a list of |
| 915 all the filenames (or NULL if none), instead of taking the first. */ | |
| 916 | |
| 917 static string_vector | |
| 4390 | 918 kpse_all_path_search (const std::string& path, const std::string& name) |
| 4378 | 919 { |
| 4390 | 920 return search (path, name, true, true); |
| 4378 | 921 } |
| 4392 | 922 |
| 4378 | 923 /* This is the hard case -- look in each element of PATH for each |
| 924 element of NAMES. If ALL is false, return the first file found. | |
| 925 Otherwise, search all elements of PATH. */ | |
| 926 | |
| 4390 | 927 static string_vector |
| 4394 | 928 path_find_first_of (const std::string& path, const string_vector& names, |
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929 bool /* must_exist */, bool all) |
| 4378 | 930 { |
| 4390 | 931 string_vector ret_list; |
| 4378 | 932 bool done = false; |
| 4390 | 933 |
| 8021 | 934 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4378 | 935 { |
| 4394 | 936 std::string elt = *pi; |
| 937 | |
| 4378 | 938 str_llist_type *dirs; |
| 939 str_llist_elt_type *dirs_elt; | |
| 4390 | 940 string_vector found; |
| 4378 | 941 bool allow_disk_search = true; |
| 942 | |
| 4394 | 943 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
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944 { |
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945 /* Those magic leading chars in a path element means don't |
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946 search the disk for this elt. And move past the magic to |
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947 get to the name. */ |
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948 |
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949 allow_disk_search = false; |
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950 elt = elt.substr (2); |
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951 } |
| 4378 | 952 |
| 953 /* Do not touch the device if present */ | |
| 954 | |
| 955 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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956 { |
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957 while (elt.length () > 3 |
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958 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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959 { |
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960 elt[2] = elt[1]; |
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961 elt[1] = elt[0]; |
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962 elt = elt.substr (1); |
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963 } |
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964 } |
| 4378 | 965 else |
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966 { |
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967 /* We never want to search the whole disk. */ |
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968 while (elt.length () > 1 |
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969 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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970 elt = elt.substr (1); |
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971 } |
| 4378 | 972 |
| 973 /* We have to search one directory at a time. */ | |
| 974 dirs = kpse_element_dirs (elt); | |
| 975 for (dirs_elt = *dirs; dirs_elt; dirs_elt = STR_LLIST_NEXT (*dirs_elt)) | |
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976 { |
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977 const std::string dir = STR_LLIST (*dirs_elt); |
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978 |
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979 int len = names.length (); |
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980 for (int i = 0; i < len && !done; i++) |
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981 { |
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982 std::string name = names[i]; |
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983 |
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984 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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985 (find_first_of), also tests first_search, and does the |
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986 resetting. */ |
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987 found = first_search |
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988 ? string_vector () : kpse_db_search (name, dir.c_str (), all); |
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989 |
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990 /* Search the filesystem if (1) the path spec allows it, |
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991 and either |
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992 |
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993 (2a) we are searching for texmf.cnf ; or |
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994 (2b) no db exists; or |
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995 (2c) no db's are relevant to this elt; or |
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996 (3) MUST_EXIST && NAME was not in the db. |
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997 |
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998 In (2*), `found' will be NULL. |
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999 In (3), `found' will be an empty list. */ |
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1000 |
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1001 if (allow_disk_search && found.empty ()) |
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1002 { |
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1003 static str_llist_type *tmp = 0; |
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1004 |
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1005 if (! tmp) |
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1006 { |
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1007 tmp = new str_llist_type; |
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1008 *tmp = 0; |
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1009 str_llist_add (tmp, ""); |
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1010 } |
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1011 |
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1012 STR_LLIST (*(*tmp)) = dir; |
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1013 |
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1014 found = dir_list_search (tmp, name, all); |
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1015 } |
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1016 |
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1017 /* Did we find anything anywhere? */ |
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1018 if (! found.empty ()) |
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1019 { |
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1020 if (all) |
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1021 ret_list.append (found); |
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1022 else |
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1023 { |
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1024 ret_list.append (found[0]); |
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1025 done = true; |
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1026 } |
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1027 } |
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1028 } |
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1029 } |
| 4378 | 1030 } |
| 1031 | |
| 1032 return ret_list; | |
| 4391 | 1033 } |
| 4378 | 1034 |
| 4390 | 1035 static string_vector |
| 1036 find_first_of (const std::string& path, const string_vector& names, | |
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1037 bool must_exist, bool all) |
| 4378 | 1038 { |
| 4390 | 1039 string_vector ret_list; |
| 4378 | 1040 |
| 1041 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 1042 { | |
| 10411 | 1043 gnulib::fputs ("start find_first_of ((", stderr); |
| 4391 | 1044 |
| 4390 | 1045 int len = names.length (); |
| 4391 | 1046 |
| 4390 | 1047 for (int i = 0; i < len; i++) |
|
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1048 { |
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1049 if (i == 0) |
| 10411 | 1050 gnulib::fputs (names[i].c_str (), stderr); |
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1051 else |
| 10411 | 1052 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
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1053 } |
| 4391 | 1054 |
| 10411 | 1055 gnulib::fprintf (stderr, "), path=%s, must_exist=%d).\n", |
| 1056 path.c_str (), must_exist); | |
| 4378 | 1057 } |
| 1058 | |
| 4409 | 1059 for (int i = 0; i < names.length (); i++) |
| 1060 { | |
| 1061 std::string name = names[i]; | |
| 1062 | |
| 1063 if (kpse_absolute_p (name, true)) | |
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1064 { |
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1065 /* If the name is absolute or explicitly relative, no need |
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1066 to consider PATH at all. If we find something, then we |
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1067 are done. */ |
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1068 |
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1069 ret_list = absolute_search (name); |
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1070 |
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1071 if (! ret_list.empty ()) |
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1072 return ret_list; |
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1073 } |
| 4409 | 1074 } |
| 1075 | |
| 4378 | 1076 /* Find the file. */ |
| 1077 ret_list = path_find_first_of (path, names, must_exist, all); | |
| 1078 | |
| 1079 /* The very first search is for texmf.cnf. We can't log that, since | |
| 1080 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 1081 if (first_search) |
| 1082 { | |
| 1083 first_search = false; | |
| 1084 } | |
| 1085 else | |
| 1086 { | |
| 1087 /* Record the filenames we found, if desired. And wrap them in a | |
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1088 debugging line if we're doing that. */ |
| 4391 | 1089 |
| 1090 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
|
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1091 { |
| 10411 | 1092 gnulib::fputs ("find_first_of (", stderr); |
|
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1093 |
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1094 int len = names.length (); |
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1095 |
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1096 for (int i = 0; i < len; i++) |
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1097 { |
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1098 if (i == 0) |
| 10411 | 1099 gnulib::fputs (names[i].c_str (), stderr); |
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1100 else |
| 10411 | 1101 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
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1102 } |
| 10411 | 1103 |
| 1104 gnulib::fputs (") =>", stderr); | |
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1105 } |
| 4391 | 1106 |
| 1107 log_search (ret_list); | |
| 1108 | |
| 1109 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 1110 gnulib::putc ('\n', stderr); |
| 4391 | 1111 } |
| 4378 | 1112 |
| 4390 | 1113 return ret_list; |
| 4378 | 1114 } |
| 1115 | |
| 1116 /* Search each element of PATH for each element of NAMES. Return the | |
| 1117 first one found. */ | |
| 1118 | |
| 4399 | 1119 /* Search each element of PATH for each element in the list of NAMES. |
| 1120 Return the first one found. */ | |
| 1121 | |
| 1122 static std::string | |
| 4390 | 1123 kpse_path_find_first_of (const std::string& path, const string_vector& names, |
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1124 bool must_exist) |
| 4378 | 1125 { |
| 4390 | 1126 string_vector ret_list = find_first_of (path, names, must_exist, false); |
| 1127 | |
| 1128 return ret_list.empty () ? std::string () : ret_list[0]; | |
| 4378 | 1129 } |
| 1130 | |
| 1131 /* Search each element of PATH for each element of NAMES and return a | |
| 1132 list containing everything found, in the order found. */ | |
| 1133 | |
| 4399 | 1134 /* Like `kpse_path_find_first_of' with MUST_EXIST true, but return a |
| 1135 list of all the filenames (or NULL if none), instead of taking the | |
| 1136 first. */ | |
| 1137 | |
| 1138 static string_vector | |
| 4390 | 1139 kpse_all_path_find_first_of (const std::string& path, |
|
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1140 const string_vector& names) |
| 4378 | 1141 { |
| 4390 | 1142 return find_first_of (path, names, true, true); |
| 4378 | 1143 } |
| 1144 | |
| 4399 | 1145 /* General expansion. Some of this file (the brace-expansion |
| 4378 | 1146 code from bash) is covered by the GPL; this is the only GPL-covered |
| 1147 code in kpathsea. The part of the file that I wrote (the first | |
| 1148 couple of functions) is covered by the LGPL. */ | |
| 1149 | |
| 1150 /* If NAME has a leading ~ or ~user, Unix-style, expand it to the user's | |
| 1151 home directory, and return a new malloced string. If no ~, or no | |
| 1152 <pwd.h>, just return NAME. */ | |
| 1153 | |
| 4389 | 1154 static std::string |
| 1155 kpse_tilde_expand (const std::string& name) | |
| 4378 | 1156 { |
| 4389 | 1157 std::string expansion; |
| 4391 | 1158 |
| 4378 | 1159 /* If no leading tilde, do nothing. */ |
| 5137 | 1160 if (name.empty () || name[0] != '~') |
| 4391 | 1161 { |
| 1162 expansion = name; | |
| 1163 | |
| 1164 /* If a bare tilde, return the home directory or `.'. (Very | |
|
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1165 unlikely that the directory name will do anyone any good, but |
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1166 ... */ |
| 4391 | 1167 } |
| 1168 else if (name.length () == 1) | |
| 1169 { | |
| 1170 expansion = octave_env::getenv ("HOME"); | |
| 1171 | |
| 1172 if (expansion.empty ()) | |
|
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1173 expansion = "."; |
| 4391 | 1174 |
| 1175 /* If `~/', remove any trailing / or replace leading // in $HOME. | |
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1176 Should really check for doubled intermediate slashes, too. */ |
| 4378 | 1177 } |
| 4391 | 1178 else if (IS_DIR_SEP (name[1])) |
| 1179 { | |
| 1180 unsigned c = 1; | |
| 1181 std::string home = octave_env::getenv ("HOME"); | |
| 1182 | |
| 1183 if (home.empty ()) | |
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1184 home = "."; |
| 4391 | 1185 |
| 1186 size_t home_len = home.length (); | |
| 1187 | |
| 1188 /* handle leading // */ | |
| 1189 if (home_len > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
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1190 home = home.substr (1); |
| 4391 | 1191 |
| 1192 /* omit / after ~ */ | |
| 1193 if (IS_DIR_SEP (home[home_len - 1])) | |
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1194 c++; |
| 4391 | 1195 |
| 1196 expansion = home + name.substr (c); | |
| 1197 | |
| 1198 /* If `~user' or `~user/', look up user in the passwd database (but | |
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1199 OS/2 doesn't have this concept. */ |
| 4378 | 1200 } |
| 4391 | 1201 else |
| 4378 | 1202 #ifdef HAVE_PWD_H |
| 1203 { | |
| 1204 unsigned c = 2; | |
| 4391 | 1205 |
| 1206 /* find user name */ | |
| 1207 while (name.length () > c && ! IS_DIR_SEP (name[c])) | |
| 4378 | 1208 c++; |
| 4391 | 1209 |
| 1210 std::string user = name.substr (1, c-1); | |
| 1211 | |
| 4378 | 1212 /* We only need the cast here for (deficient) systems |
| 1213 which do not declare `getpwnam' in <pwd.h>. */ | |
| 4391 | 1214 octave_passwd p = octave_passwd::getpwnam (user); |
| 4378 | 1215 |
| 1216 /* If no such user, just use `.'. */ | |
| 4391 | 1217 std::string home = p ? p.dir () : std::string ("."); |
| 1218 | |
| 1219 if (home.empty ()) | |
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1220 home = "."; |
| 4391 | 1221 |
| 1222 /* handle leading // */ | |
| 1223 if (home.length () > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
| 1224 home = home.substr (1); | |
| 1225 | |
| 1226 /* If HOME ends in /, omit the / after ~user. */ | |
| 1227 if (name.length () > c && IS_DIR_SEP (home[home.length () - 1])) | |
| 1228 c++; | |
| 1229 | |
| 1230 expansion = name.length () > c ? home : home + name.substr (c); | |
| 4378 | 1231 } |
| 1232 #else /* not HAVE_PWD_H */ | |
| 4391 | 1233 expansion = name; |
| 4378 | 1234 #endif /* not HAVE_PWD_H */ |
| 1235 | |
| 4389 | 1236 return expansion; |
| 4378 | 1237 } |
| 1238 | |
| 1239 /* Do variable expansion first so ~${USER} works. (Besides, it's what the | |
| 1240 shells do.) */ | |
| 1241 | |
| 4399 | 1242 /* Call kpse_var_expand and kpse_tilde_expand (in that order). Result |
| 1243 is always in fresh memory, even if no expansions were done. */ | |
| 1244 | |
| 1245 static std::string | |
| 4389 | 1246 kpse_expand (const std::string& s) |
| 4378 | 1247 { |
| 4389 | 1248 std::string var_expansion = kpse_var_expand (s); |
| 1249 return kpse_tilde_expand (var_expansion); | |
| 4378 | 1250 } |
| 1251 | |
| 1252 /* Forward declarations of functions from the original expand.c */ | |
| 4397 | 1253 static string_vector brace_expand (const std::string&); |
| 4378 | 1254 |
| 1255 /* If $KPSE_DOT is defined in the environment, prepend it to any relative | |
| 1256 path components. */ | |
| 1257 | |
| 4389 | 1258 static std::string |
| 1259 kpse_expand_kpse_dot (const std::string& path) | |
| 4378 | 1260 { |
| 4389 | 1261 std::string ret; |
| 4391 | 1262 std::string kpse_dot = octave_env::getenv ("KPSE_DOT"); |
| 1263 | |
| 1264 if (kpse_dot.empty ()) | |
| 4378 | 1265 return path; |
| 1266 | |
| 8021 | 1267 for (kpse_path_iterator pi (path); pi != std::string::npos; pi++) |
| 4391 | 1268 { |
| 4394 | 1269 std::string elt = *pi; |
| 1270 | |
| 4391 | 1271 /* We assume that the !! magic is only used on absolute components. |
|
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1272 Single "." get special treatment, as does "./" or its equivalent. */ |
| 4391 | 1273 |
| 4394 | 1274 size_t elt_len = elt.length (); |
| 1275 | |
| 1276 if (kpse_absolute_p (elt, false) | |
|
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1277 || (elt_len > 1 && elt[0] == '!' && elt[1] == '!')) |
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1278 ret += elt + ENV_SEP_STRING; |
| 4394 | 1279 else if (elt_len == 1 && elt[0] == '.') |
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1280 ret += kpse_dot + ENV_SEP_STRING; |
| 4394 | 1281 else if (elt_len > 1 && elt[0] == '.' && IS_DIR_SEP (elt[1])) |
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1282 ret += kpse_dot + elt.substr (1) + ENV_SEP_STRING; |
| 4391 | 1283 else |
|
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1284 ret += kpse_dot + DIR_SEP_STRING + elt + ENV_SEP_STRING; |
| 4378 | 1285 } |
| 1286 | |
| 4389 | 1287 int len = ret.length (); |
| 1288 if (len > 0) | |
| 4395 | 1289 ret.resize (len-1); |
| 4389 | 1290 |
| 4378 | 1291 return ret; |
| 1292 } | |
| 1293 | |
| 1294 /* Do brace expansion on ELT; then do variable and ~ expansion on each | |
| 1295 element of the result; then do brace expansion again, in case a | |
| 1296 variable definition contained braces (e.g., $TEXMF). Return a | |
| 1297 string comprising all of the results separated by ENV_SEP_STRING. */ | |
| 1298 | |
| 4389 | 1299 static std::string |
| 4394 | 1300 kpse_brace_expand_element (const std::string& elt) |
| 4378 | 1301 { |
| 4389 | 1302 std::string ret; |
| 4378 | 1303 |
| 4397 | 1304 string_vector expansions = brace_expand (elt); |
| 1305 | |
| 1306 for (int i = 0; i < expansions.length (); i++) | |
| 4391 | 1307 { |
| 1308 /* Do $ and ~ expansion on each element. */ | |
| 1309 std::string x = kpse_expand (expansions[i]); | |
| 1310 | |
| 1311 if (x != expansions[i]) | |
|
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1312 { |
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1313 /* If we did any expansions, do brace expansion again. Since |
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1314 recursive variable definitions are not allowed, this recursion |
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1315 must terminate. (In practice, it's unlikely there will ever be |
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1316 more than one level of recursion.) */ |
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1317 x = kpse_brace_expand_element (x); |
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1318 } |
| 4391 | 1319 |
| 1320 ret += x + ENV_SEP_STRING; | |
| 4378 | 1321 } |
| 1322 | |
| 4389 | 1323 ret.resize (ret.length () - 1); |
| 4391 | 1324 |
| 4378 | 1325 return ret; |
| 1326 } | |
| 1327 | |
| 4399 | 1328 /* Do brace expansion and call `kpse_expand' on each element of the |
| 1329 result; return the final expansion (always in fresh memory, even if | |
| 1330 no expansions were done). We don't call `kpse_expand_default' | |
| 1331 because there is a whole sequence of defaults to run through; see | |
| 1332 `kpse_init_format'. */ | |
| 1333 | |
| 1334 static std::string | |
| 4397 | 1335 kpse_brace_expand (const std::string& path) |
| 4378 | 1336 { |
| 1337 /* Must do variable expansion first because if we have | |
| 1338 foo = .:~ | |
| 1339 TEXINPUTS = $foo | |
| 1340 we want to end up with TEXINPUTS = .:/home/karl. | |
| 1341 Since kpse_path_element is not reentrant, we must get all | |
| 1342 the path elements before we start the loop. */ | |
| 4389 | 1343 std::string tmp = kpse_var_expand (path); |
| 4394 | 1344 |
| 4389 | 1345 std::string ret; |
| 4378 | 1346 |
| 8021 | 1347 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1348 { |
| 4394 | 1349 std::string elt = *pi; |
| 1350 | |
| 4391 | 1351 /* Do brace expansion first, so tilde expansion happens in {~ka,~kb}. */ |
| 1352 std::string expansion = kpse_brace_expand_element (elt); | |
| 1353 ret += expansion + ENV_SEP_STRING; | |
| 1354 } | |
| 4378 | 1355 |
| 4394 | 1356 size_t len = ret.length (); |
| 4389 | 1357 if (len > 0) |
| 4395 | 1358 ret.resize (len-1); |
| 4389 | 1359 |
| 1360 return kpse_expand_kpse_dot (ret); | |
| 4378 | 1361 } |
| 4392 | 1362 |
| 4378 | 1363 /* Expand all special constructs in a path, and include only the actually |
| 1364 existing directories in the result. */ | |
| 4399 | 1365 |
| 1366 /* Do brace expansion and call `kpse_expand' on each argument of the | |
| 1367 result, then expand any `//' constructs. The final expansion (always | |
| 1368 in fresh memory) is a path of all the existing directories that match | |
| 1369 the pattern. */ | |
| 1370 | |
| 1371 static std::string | |
| 4397 | 1372 kpse_path_expand (const std::string& path) |
| 4378 | 1373 { |
| 4392 | 1374 std::string ret; |
| 4378 | 1375 unsigned len; |
| 1376 | |
| 1377 len = 0; | |
| 4391 | 1378 |
| 4378 | 1379 /* Expand variables and braces first. */ |
| 4389 | 1380 std::string tmp = kpse_brace_expand (path); |
| 4392 | 1381 |
| 4378 | 1382 /* Now expand each of the path elements, printing the results */ |
| 8021 | 1383 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1384 { |
| 4394 | 1385 std::string elt = *pi; |
| 1386 | |
| 4391 | 1387 str_llist_type *dirs; |
| 1388 | |
| 1389 /* Skip and ignore magic leading chars. */ | |
| 4394 | 1390 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
|
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1391 elt = elt.substr (2); |
| 4391 | 1392 |
| 1393 /* Do not touch the device if present */ | |
| 1394 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
|
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1395 { |
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1396 while (elt.length () > 3 |
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1397 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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1398 { |
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1399 elt[2] = elt[1]; |
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1400 elt[1] = elt[0]; |
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1401 elt = elt.substr (1); |
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1402 } |
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1403 } |
| 4391 | 1404 else |
|
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1405 { |
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1406 /* We never want to search the whole disk. */ |
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1407 while (elt.length () > 1 |
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1408 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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1409 elt = elt.substr (1); |
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1410 } |
| 4378 | 1411 |
| 4394 | 1412 /* Search the disk for all dirs in the component specified. |
|
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1413 Be faster to check the database, but this is more reliable. */ |
| 4394 | 1414 dirs = kpse_element_dirs (elt); |
| 1415 | |
| 1416 if (dirs && *dirs) | |
|
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1417 { |
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1418 str_llist_elt_type *dir; |
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1419 |
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1420 for (dir = *dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1421 { |
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1422 const std::string thedir = STR_LLIST (*dir); |
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1423 unsigned dirlen = thedir.length (); |
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1424 |
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1425 ret += thedir; |
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1426 len += dirlen; |
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1427 |
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1428 /* Retain trailing slash if that's the root directory. */ |
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1429 if (dirlen == 1 |
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1430 || (dirlen == 3 && NAME_BEGINS_WITH_DEVICE (thedir) |
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1431 && IS_DIR_SEP (thedir[2]))) |
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1432 { |
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1433 ret += ENV_SEP_STRING; |
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1434 len++; |
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1435 } |
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1436 |
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1437 ret[len-1] = ENV_SEP; |
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1438 } |
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1439 } |
| 4378 | 1440 } |
| 4391 | 1441 |
| 4395 | 1442 if (len > 0) |
| 1443 ret.resize (len-1); | |
| 4391 | 1444 |
| 4378 | 1445 return ret; |
| 1446 } | |
| 4392 | 1447 |
| 4378 | 1448 /* braces.c -- code for doing word expansion in curly braces. Taken from |
| 1449 bash 1.14.5. [Ans subsequently modified for kpatshea.] | |
| 1450 | |
| 1451 Copyright (C) 1987,1991 Free Software Foundation, Inc. | |
| 1452 | |
| 1453 This program is free software; you can redistribute it and/or modify it | |
| 1454 under the terms of the GNU General Public License as published by | |
| 1455 the Free Software Foundation; either version 1, or (at your option) | |
| 1456 any later version. | |
| 1457 | |
| 1458 This program is distributed in the hope that it will be useful, but | |
| 1459 WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 1460 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 1461 General Public License for more details. | |
| 1462 | |
| 1463 You should have received a copy of the GNU General Public License | |
| 1464 along with this program; see the file COPYING. If not, write to the | |
| 5307 | 1465 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 1466 MA 02110-1301, USA. */ | |
| 4378 | 1467 |
| 4391 | 1468 #define brace_whitespace(c) (! (c) || (c) == ' ' || (c) == '\t' || (c) == '\n') |
| 4378 | 1469 |
| 1470 /* Basic idea: | |
| 1471 | |
| 1472 Segregate the text into 3 sections: preamble (stuff before an open brace), | |
| 1473 postamble (stuff after the matching close brace) and amble (stuff after | |
| 1474 preamble, and before postamble). Expand amble, and then tack on the | |
| 1475 expansions to preamble. Expand postamble, and tack on the expansions to | |
| 4391 | 1476 the result so far. */ |
| 4378 | 1477 |
| 4397 | 1478 /* Return a new array of strings which is the result of appending each |
| 1479 string in ARR2 to each string in ARR1. The resultant array is | |
| 1480 len (arr1) * len (arr2) long. For convenience, ARR1 (and its contents) | |
| 1481 are free ()'ed. ARR1 can be NULL, in that case, a new version of ARR2 | |
| 1482 is returned. */ | |
| 1483 | |
| 1484 static string_vector | |
| 1485 array_concat (const string_vector& arr1, const string_vector& arr2) | |
| 4378 | 1486 { |
| 4397 | 1487 string_vector result; |
| 1488 | |
| 1489 if (arr1.empty ()) | |
| 1490 result = arr2; | |
| 1491 else if (arr2.empty ()) | |
| 1492 result = arr1; | |
| 1493 else | |
| 1494 { | |
| 1495 int len1 = arr1.length (); | |
| 1496 int len2 = arr2.length (); | |
| 1497 | |
| 1498 result = string_vector (len1 * len2); | |
| 1499 | |
| 1500 int k = 0; | |
| 1501 for (int i = 0; i < len2; i++) | |
|
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1502 for (int j = 0; j < len1; j++) |
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1503 result[k++] = arr1[j] + arr2[i]; |
| 4397 | 1504 } |
| 1505 | |
| 1506 return result; | |
| 4378 | 1507 } |
| 1508 | |
| 4397 | 1509 static int brace_gobbler (const std::string&, int&, int); |
| 1510 static string_vector expand_amble (const std::string&); | |
| 4378 | 1511 |
| 1512 /* Return an array of strings; the brace expansion of TEXT. */ | |
| 4397 | 1513 static string_vector |
| 1514 brace_expand (const std::string& text) | |
| 4378 | 1515 { |
| 1516 /* Find the text of the preamble. */ | |
| 4397 | 1517 int i = 0; |
| 1518 int c = brace_gobbler (text, i, '{'); | |
| 1519 | |
| 1520 std::string preamble = text.substr (0, i); | |
| 1521 | |
| 1522 string_vector result = string_vector (preamble); | |
| 1523 | |
| 1524 if (c == '{') | |
| 4378 | 1525 { |
| 4397 | 1526 /* Find the amble. This is the stuff inside this set of braces. */ |
| 1527 int start = ++i; | |
| 1528 c = brace_gobbler (text, i, '}'); | |
| 1529 | |
| 1530 /* What if there isn't a matching close brace? */ | |
| 1531 if (! c) | |
|
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1532 { |
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1533 (*current_liboctave_warning_handler) |
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1534 ("%s: Unmatched {", text.c_str ()); |
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1535 |
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1536 result = string_vector (text); |
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1537 } |
| 4397 | 1538 else |
|
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1539 { |
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1540 std::string amble = text.substr (start, i-start); |
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1541 result = array_concat (result, expand_amble (amble)); |
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1542 |
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1543 std::string postamble = text.substr (i+1); |
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1544 result = array_concat (result, brace_expand (postamble)); |
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1545 } |
| 4378 | 1546 } |
| 1547 | |
| 4397 | 1548 return result; |
| 4378 | 1549 } |
| 1550 | |
| 4397 | 1551 /* The character which is used to separate arguments. */ |
| 1552 static int brace_arg_separator = ','; | |
| 1553 | |
| 4378 | 1554 /* Expand the text found inside of braces. We simply try to split the |
| 1555 text at BRACE_ARG_SEPARATORs into separate strings. We then brace | |
| 1556 expand each slot which needs it, until there are no more slots which | |
| 1557 need it. */ | |
| 4397 | 1558 static string_vector |
| 1559 expand_amble (const std::string& text) | |
| 4378 | 1560 { |
| 4397 | 1561 string_vector result; |
| 1562 | |
| 1563 size_t text_len = text.length (); | |
| 1564 size_t start; | |
| 1565 int i, c; | |
| 1566 | |
| 1567 for (start = 0, i = 0, c = 1; c && start < text_len; start = ++i) | |
| 4378 | 1568 { |
| 4397 | 1569 int i0 = i; |
| 1570 int c0 = brace_gobbler (text, i0, brace_arg_separator); | |
| 1571 int i1 = i; | |
| 1572 int c1 = brace_gobbler (text, i1, ENV_SEP); | |
| 4378 | 1573 c = c0 | c1; |
| 1574 i = (i0 < i1 ? i0 : i1); | |
| 1575 | |
| 4397 | 1576 std::string tem = text.substr (start, i-start); |
| 1577 | |
| 1578 string_vector partial = brace_expand (tem); | |
| 1579 | |
| 1580 if (result.empty ()) | |
|
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1581 result = partial; |
| 4378 | 1582 else |
|
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1583 result.append (partial); |
| 4378 | 1584 } |
| 4397 | 1585 |
| 1586 return result; | |
| 4378 | 1587 } |
| 1588 | |
| 1589 /* Start at INDEX, and skip characters in TEXT. Set INDEX to the | |
| 1590 index of the character matching SATISFY. This understands about | |
| 1591 quoting. Return the character that caused us to stop searching; | |
| 1592 this is either the same as SATISFY, or 0. */ | |
| 1593 static int | |
| 4397 | 1594 brace_gobbler (const std::string& text, int& indx, int satisfy) |
| 4378 | 1595 { |
| 4397 | 1596 int c = 0, level = 0, quoted = 0, pass_next = 0; |
| 1597 | |
| 1598 size_t text_len = text.length (); | |
| 1599 | |
| 1600 size_t i = indx; | |
| 1601 | |
| 1602 for (; i < text_len; i++) | |
| 4378 | 1603 { |
| 4397 | 1604 c = text[i]; |
| 1605 | |
| 4378 | 1606 if (pass_next) |
|
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1607 { |
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1608 pass_next = 0; |
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1609 continue; |
|
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1610 } |
| 4378 | 1611 |
| 1612 /* A backslash escapes the next character. This allows backslash to | |
|
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1613 escape the quote character in a double-quoted string. */ |
| 4378 | 1614 if (c == '\\' && (quoted == 0 || quoted == '"' || quoted == '`')) |
| 1615 { | |
| 1616 pass_next = 1; | |
| 1617 continue; | |
| 1618 } | |
| 1619 | |
| 1620 if (quoted) | |
|
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1621 { |
|
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|
1622 if (c == quoted) |
|
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1623 quoted = 0; |
|
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|
1624 continue; |
|
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|
1625 } |
| 4378 | 1626 |
| 1627 if (c == '"' || c == '\'' || c == '`') | |
|
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1628 { |
|
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1629 quoted = c; |
|
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1630 continue; |
|
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1631 } |
| 4391 | 1632 |
| 4378 | 1633 if (c == satisfy && !level && !quoted) |
|
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1634 { |
|
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1635 /* We ignore an open brace surrounded by whitespace, and also |
|
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1636 an open brace followed immediately by a close brace, that |
|
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1637 was preceded with whitespace. */ |
|
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1638 if (c == '{' && |
|
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1639 ((i == 0 || brace_whitespace (text[i-1])) && |
|
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1640 (i+1 < text_len && |
|
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1641 (brace_whitespace (text[i+1]) || text[i+1] == '}')))) |
|
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1642 continue; |
|
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1643 /* If this is being compiled as part of bash, ignore the `{' |
|
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1644 in a `${}' construct */ |
|
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1645 if ((c != '{') || i == 0 || (text[i-1] != '$')) |
|
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|
1646 break; |
|
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|
1647 } |
| 4378 | 1648 |
| 1649 if (c == '{') | |
|
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1650 level++; |
| 4378 | 1651 else if (c == '}' && level) |
|
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1652 level--; |
| 4378 | 1653 } |
| 1654 | |
| 4397 | 1655 indx = i; |
| 1656 return c; | |
| 4378 | 1657 } |
| 1658 | |
| 1659 /* For each file format, we record the following information. The main | |
| 1660 thing that is not part of this structure is the environment variable | |
| 1661 lists. They are used directly in tex-file.c. We could incorporate | |
| 1662 them here, but it would complicate the code a bit. We could also do | |
| 1663 it via variable expansion, but not now, maybe not ever: | |
| 1664 ${PKFONTS-${TEXFONTS-/usr/local/lib/texmf/fonts//}}. */ | |
| 1665 | |
| 4399 | 1666 struct kpse_format_info_type |
| 4378 | 1667 { |
|
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1668 std::string type; /* Human-readable description. */ |
|
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1669 std::string path; /* The search path to use. */ |
|
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1670 std::string raw_path; /* Pre-$~ (but post-default) expansion. */ |
| 4390 | 1671 std::string path_source; /* Where the path started from. */ |
| 1672 std::string override_path; /* From client environment variable. */ | |
| 1673 std::string client_path; /* E.g., from dvips's config.ps. */ | |
|
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1674 std::string cnf_path; /* From texmf.cnf. */ |
| 4390 | 1675 std::string default_path; /* If all else fails. */ |
|
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1676 string_vector suffix; /* For kpse_find_file to check for/append. */ |
| 4399 | 1677 }; |
| 4378 | 1678 |
| 1679 /* The sole variable of that type, indexed by `kpse_file_format_type'. | |
| 1680 Initialized by calls to `kpse_find_file' for `kpse_init_format'. */ | |
| 1681 static kpse_format_info_type kpse_format_info; | |
| 1682 | |
| 1683 /* And EXPAND_DEFAULT calls kpse_expand_default on try_path and the | |
| 1684 present info->path. */ | |
| 4396 | 1685 #define EXPAND_DEFAULT(try_path, source_string) \ |
| 1686 do \ | |
| 1687 { \ | |
| 1688 if (! try_path.empty ()) \ | |
| 1689 { \ | |
|
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1690 info.raw_path = try_path; \ |
| 4396 | 1691 info.path = kpse_expand_default (try_path, info.path); \ |
|
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|
1692 info.path_source = source_string; \ |
| 4396 | 1693 } \ |
| 1694 } \ | |
| 1695 while (0) | |
| 4378 | 1696 |
| 1697 static hash_table_type db; /* The hash table for all the ls-R's. */ | |
| 4928 | 1698 |
| 4378 | 1699 static hash_table_type alias_db; |
| 1700 | |
| 4390 | 1701 static string_vector db_dir_list; |
| 4392 | 1702 |
| 4378 | 1703 /* Return true if FILENAME could be in PATH_ELT, i.e., if the directory |
| 1704 part of FILENAME matches PATH_ELT. Have to consider // wildcards, but | |
| 1705 $ and ~ expansion have already been done. */ | |
| 4391 | 1706 |
| 4378 | 1707 static bool |
| 4390 | 1708 match (const std::string& filename_arg, const std::string& path_elt_arg) |
| 4378 | 1709 { |
| 4390 | 1710 const char *filename = filename_arg.c_str (); |
| 1711 const char *path_elt = path_elt_arg.c_str (); | |
| 1712 | |
| 4378 | 1713 const char *original_filename = filename; |
| 1714 bool matched = false; | |
| 4391 | 1715 |
| 1716 for (; *filename && *path_elt; filename++, path_elt++) | |
| 1717 { | |
| 4394 | 1718 if (*filename == *path_elt) /* normal character match */ |
|
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|
1719 ; |
| 4391 | 1720 |
| 1721 else if (IS_DIR_SEP (*path_elt) /* at // */ | |
|
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1722 && original_filename < filename && IS_DIR_SEP (path_elt[-1])) |
|
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1723 { |
|
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|
1724 while (IS_DIR_SEP (*path_elt)) |
|
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1725 path_elt++; /* get past second and any subsequent /'s */ |
|
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1726 |
|
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1727 if (*path_elt == 0) |
|
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|
1728 { |
|
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1729 /* Trailing //, matches anything. We could make this |
|
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1730 part of the other case, but it seems pointless to do |
|
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1731 the extra work. */ |
|
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1732 matched = true; |
|
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|
1733 break; |
|
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|
1734 } |
|
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1735 else |
|
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1736 { |
|
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1737 /* Intermediate //, have to match rest of PATH_ELT. */ |
|
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1738 for (; !matched && *filename; filename++) |
|
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1739 { |
|
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1740 /* Try matching at each possible character. */ |
|
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1741 if (IS_DIR_SEP (filename[-1]) && *filename == *path_elt) |
|
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1742 matched = match (filename, path_elt); |
|
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1743 } |
|
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|
1744 |
|
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1745 /* Prevent filename++ when *filename='\0'. */ |
|
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|
1746 break; |
|
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|
1747 } |
|
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1748 } |
| 4391 | 1749 else |
|
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1750 /* normal character nonmatch, quit */ |
|
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1751 break; |
| 4378 | 1752 } |
| 1753 | |
| 1754 /* If we've reached the end of PATH_ELT, check that we're at the last | |
| 1755 component of FILENAME, we've matched. */ | |
| 4391 | 1756 if (! matched && *path_elt == 0) |
| 1757 { | |
| 1758 /* Probably PATH_ELT ended with `vf' or some such, and FILENAME | |
|
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1759 ends with `vf/ptmr.vf'. In that case, we'll be at a |
|
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|
1760 directory separator. On the other hand, if PATH_ELT ended |
|
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1761 with a / (as in `vf/'), FILENAME being the same `vf/ptmr.vf', |
|
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1762 we'll be at the `p'. Upshot: if we're at a dir separator in |
|
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1763 FILENAME, skip it. But if not, that's ok, as long as there |
|
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1764 are no more dir separators. */ |
| 4391 | 1765 |
| 1766 if (IS_DIR_SEP (*filename)) | |
|
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1767 filename++; |
| 4391 | 1768 |
| 1769 while (*filename && !IS_DIR_SEP (*filename)) | |
|
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1770 filename++; |
| 4391 | 1771 |
| 1772 matched = *filename == 0; | |
| 1773 } | |
| 1774 | |
| 4378 | 1775 return matched; |
| 1776 } | |
| 1777 | |
| 1778 /* If DB_DIR is a prefix of PATH_ELT, return true; otherwise false. | |
| 1779 That is, the question is whether to try the db for a file looked up | |
| 1780 in PATH_ELT. If PATH_ELT == ".", for example, the answer is no. If | |
| 1781 PATH_ELT == "/usr/local/lib/texmf/fonts//tfm", the answer is yes. | |
| 4391 | 1782 |
| 4378 | 1783 In practice, ls-R is only needed for lengthy subdirectory |
| 1784 comparisons, but there's no gain to checking PATH_ELT to see if it is | |
| 1785 a subdir match, since the only way to do that is to do a string | |
| 1786 search in it, which is all we do anyway. */ | |
| 4391 | 1787 |
| 4378 | 1788 static bool |
| 4390 | 1789 elt_in_db (const std::string& db_dir, const std::string& path_elt) |
| 4378 | 1790 { |
| 1791 bool found = false; | |
| 1792 | |
| 4390 | 1793 size_t db_dir_len = db_dir.length (); |
| 1794 size_t path_elt_len = path_elt.length (); | |
| 1795 | |
| 1796 size_t i = 0; | |
| 1797 | |
| 4394 | 1798 while (! found && db_dir[i] == path_elt[i]) |
| 4391 | 1799 { |
| 1800 i++; | |
| 1801 /* If we've matched the entire db directory, it's good. */ | |
| 1802 if (i == db_dir_len) | |
|
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1803 found = true; |
| 4391 | 1804 |
| 4378 | 1805 /* If we've reached the end of PATH_ELT, but not the end of the db |
| 1806 directory, it's no good. */ | |
| 4391 | 1807 else if (i == path_elt_len) |
|
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1808 break; |
| 4391 | 1809 } |
| 4378 | 1810 |
| 1811 return found; | |
| 1812 } | |
| 4392 | 1813 |
| 4378 | 1814 /* Avoid doing anything if this PATH_ELT is irrelevant to the databases. */ |
| 1815 | |
| 4399 | 1816 /* Return list of matches for NAME in the ls-R file matching PATH_ELT. If |
| 1817 ALL is set, return (null-terminated list) of all matches, else just | |
| 1818 the first. If no matches, return a pointer to an empty list. If no | |
| 1819 databases can be read, or PATH_ELT is not in any of the databases, | |
| 1820 return NULL. */ | |
| 1821 | |
| 1822 static string_vector | |
| 4390 | 1823 kpse_db_search (const std::string& name_arg, |
|
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1824 const std::string& orig_path_elt, bool all) |
| 4378 | 1825 { |
| 1826 bool done; | |
| 4390 | 1827 string_vector ret; |
| 1828 string_vector aliases; | |
| 4378 | 1829 bool relevant = false; |
| 4390 | 1830 |
| 4394 | 1831 std::string name = name_arg; |
| 4391 | 1832 |
| 4378 | 1833 /* If we failed to build the database (or if this is the recursive |
| 1834 call to build the db path), quit. */ | |
| 4398 | 1835 if (! db.buckets) |
| 4390 | 1836 return ret; |
| 4391 | 1837 |
| 4378 | 1838 /* When tex-glyph.c calls us looking for, e.g., dpi600/cmr10.pk, we |
| 1839 won't find it unless we change NAME to just `cmr10.pk' and append | |
| 1840 `/dpi600' to PATH_ELT. We are justified in using a literal `/' | |
| 1841 here, since that's what tex-glyph.c unconditionally uses in | |
| 1842 DPI_BITMAP_SPEC. But don't do anything if the / begins NAME; that | |
| 1843 should never happen. */ | |
| 4394 | 1844 std::string path_elt; |
| 1845 size_t last_slash = name.rfind ('/'); | |
| 8021 | 1846 if (last_slash != std::string::npos && last_slash != 0) |
| 4390 | 1847 { |
| 4394 | 1848 std::string dir_part = name.substr (0, last_slash); |
| 1849 name = name.substr (last_slash + 1); | |
| 4390 | 1850 } |
| 1851 else | |
| 4394 | 1852 path_elt = orig_path_elt; |
| 4378 | 1853 |
| 1854 /* Don't bother doing any lookups if this `path_elt' isn't covered by | |
| 1855 any of database directories. We do this not so much because the | |
| 1856 extra couple of hash lookups matter -- they don't -- but rather | |
| 1857 because we want to return NULL in this case, so path_search can | |
| 1858 know to do a disk search. */ | |
| 4394 | 1859 for (int e = 0; ! relevant && e < db_dir_list.length (); e++) |
| 4390 | 1860 relevant = elt_in_db (db_dir_list[e], path_elt); |
| 1861 | |
| 4391 | 1862 if (! relevant) |
| 4390 | 1863 return ret; |
| 4378 | 1864 |
| 1865 /* If we have aliases for this name, use them. */ | |
| 1866 if (alias_db.buckets) | |
| 1867 aliases = hash_lookup (alias_db, name); | |
| 1868 | |
| 4390 | 1869 /* Push aliases up by one and insert the original name at the front. */ |
| 1870 int len = aliases.length (); | |
| 1871 aliases.resize (len+1); | |
| 1872 for (int i = len; i > 0; i--) | |
| 1873 aliases[i] = aliases[i - 1]; | |
| 1874 aliases[0] = name; | |
| 4378 | 1875 |
| 1876 done = false; | |
| 4390 | 1877 len = aliases.length (); |
| 1878 for (int i = 0; i < len && !done; i++) | |
| 1879 { | |
| 1880 std::string atry = aliases[i]; | |
| 1881 | |
| 1882 /* We have an ls-R db. Look up `atry'. */ | |
| 1883 string_vector db_dirs = hash_lookup (db, atry); | |
| 1884 | |
| 1885 /* For each filename found, see if it matches the path element. For | |
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1886 example, if we have .../cx/cmr10.300pk and .../ricoh/cmr10.300pk, |
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1887 and the path looks like .../cx, we don't want the ricoh file. */ |
| 4390 | 1888 |
| 1889 int db_dirs_len = db_dirs.length (); | |
| 1890 for (int j = 0; j < db_dirs_len && !done; j++) | |
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1891 { |
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1892 std::string db_file = db_dirs[j] + atry; |
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1893 bool matched = match (db_file, path_elt); |
| 4378 | 1894 |
| 1895 #ifdef KPSE_DEBUG | |
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1896 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
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1897 DEBUGF3 ("db:match (%s,%s) = %d\n", db_file.c_str (), path_elt.c_str (), matched); |
| 4378 | 1898 #endif |
| 1899 | |
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1900 /* We got a hit in the database. Now see if the file actually |
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1901 exists, possibly under an alias. */ |
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1902 if (matched) |
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1903 { |
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1904 std::string found; |
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1905 std::string tmp = kpse_readable_file (db_file); |
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1906 if (! tmp.empty ()) |
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1907 found = db_file; |
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1908 else |
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1909 { |
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1910 /* The hit in the DB doesn't exist in disk. Now try |
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1911 all its aliases. For example, suppose we have a |
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1912 hierarchy on CD, thus `mf.bas', but ls-R contains |
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1913 `mf.base'. Find it anyway. Could probably work |
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1914 around this with aliases, but this is pretty easy |
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1915 and shouldn't hurt. The upshot is that if one of |
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1916 the aliases actually exists, we use that. */ |
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1917 |
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1918 int aliases_len = aliases.length (); |
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1919 |
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1920 for (int k = 1; k < aliases_len && found.empty (); k++) |
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1921 { |
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1922 std::string aatry = db_dirs[j] + aliases[k]; |
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1923 tmp = kpse_readable_file (aatry); |
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1924 if (! tmp.empty ()) |
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1925 found = aatry; |
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1926 } |
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1927 } |
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1928 |
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1929 /* If we have a real file, add it to the list, maybe done. */ |
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1930 if (! found.empty ()) |
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1931 { |
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1932 ret.append (found); |
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1933 |
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1934 if (! (all || found.empty ())) |
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1935 done = true; |
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1936 } |
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1937 } |
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1938 } |
| 4378 | 1939 } |
| 4391 | 1940 |
| 4378 | 1941 return ret; |
| 1942 } | |
| 1943 | |
| 4399 | 1944 /* Expand extra colons. */ |
| 4378 | 1945 |
| 1946 /* Check for leading colon first, then trailing, then doubled, since | |
| 1947 that is fastest. Usually it will be leading or trailing. */ | |
| 1948 | |
| 4399 | 1949 /* Replace a leading or trailing or doubled : in PATH with DFLT. If |
| 1950 no extra colons, return PATH. Only one extra colon is replaced. | |
| 1951 DFLT may not be NULL. */ | |
| 1952 | |
| 1953 static std::string | |
| 4394 | 1954 kpse_expand_default (const std::string& path, const std::string& fallback) |
| 4378 | 1955 { |
| 4394 | 1956 std::string expansion; |
| 1957 | |
| 1958 size_t path_len = path.length (); | |
| 1959 | |
| 1960 if (path_len == 0) | |
| 1961 expansion = fallback; | |
| 4378 | 1962 |
| 1963 /* Solitary or leading :? */ | |
| 4394 | 1964 else if (IS_ENV_SEP (path[0])) |
| 4378 | 1965 { |
| 4394 | 1966 expansion = path_len == 1 ? fallback : fallback + path; |
| 4378 | 1967 } |
| 1968 | |
| 1969 /* Sorry about the assignment in the middle of the expression, but | |
| 1970 conventions were made to be flouted and all that. I don't see the | |
| 1971 point of calling strlen twice or complicating the logic just to | |
| 1972 avoid the assignment (especially now that I've pointed it out at | |
| 1973 such great length). */ | |
| 4394 | 1974 else if (IS_ENV_SEP (path[path_len-1])) |
| 1975 expansion = path + fallback; | |
| 4378 | 1976 |
| 1977 /* OK, not leading or trailing. Check for doubled. */ | |
| 1978 else | |
| 1979 { | |
| 1980 /* What we'll return if we find none. */ | |
| 4394 | 1981 expansion = path; |
| 1982 | |
| 1983 for (size_t i = 0; i < path_len; i++) | |
| 4378 | 1984 { |
| 4394 | 1985 if (i + 1 < path_len |
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1986 && IS_ENV_SEP (path[i]) && IS_ENV_SEP (path[i+1])) |
| 4394 | 1987 { |
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1988 /* We have a doubled colon. */ |
| 4391 | 1989 |
| 4378 | 1990 /* Copy stuff up to and including the first colon. */ |
| 1991 /* Copy in FALLBACK, and then the rest of PATH. */ | |
|
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1992 expansion = path.substr (0, i+1) + fallback + path.substr (i+1); |
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1993 |
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1994 break; |
| 4378 | 1995 } |
| 1996 } | |
| 1997 } | |
| 4391 | 1998 |
| 4378 | 1999 return expansion; |
| 2000 } | |
| 2001 | |
| 4399 | 2002 /* Translate a path element to its corresponding director{y,ies}. */ |
| 4378 | 2003 |
| 2004 /* To avoid giving prototypes for all the routines and then their real | |
| 2005 definitions, we give all the subroutines first. The entry point is | |
| 2006 the last routine in the file. */ | |
| 4392 | 2007 |
| 4378 | 2008 /* Make a copy of DIR (unless it's null) and save it in L. Ensure that |
| 2009 DIR ends with a DIR_SEP for the benefit of later searches. */ | |
| 2010 | |
| 2011 static void | |
| 4390 | 2012 dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 2013 { |
| 4390 | 2014 char last_char = dir[dir.length () - 1]; |
| 4407 | 2015 |
| 4390 | 2016 std::string saved_dir = dir; |
| 4407 | 2017 |
| 2018 if (! (IS_DIR_SEP (last_char) || IS_DEVICE_SEP (last_char))) | |
| 4390 | 2019 saved_dir += DIR_SEP_STRING; |
| 4391 | 2020 |
| 4378 | 2021 str_llist_add (l, saved_dir); |
| 2022 } | |
| 2023 | |
| 4390 | 2024 /* Return true if FN is a directory or a symlink to a directory, |
| 2025 false if not. */ | |
| 2026 | |
| 2027 static bool | |
| 2028 dir_p (const std::string& fn) | |
| 2029 { | |
| 2030 #ifdef WIN32 | |
| 4391 | 2031 unsigned int fa = GetFileAttributes (fn.c_str ()); |
| 4390 | 2032 return (fa != 0xFFFFFFFF && (fa & FILE_ATTRIBUTE_DIRECTORY)); |
| 2033 #else | |
| 2034 struct stat stats; | |
| 2035 return stat (fn.c_str (), &stats) == 0 && S_ISDIR (stats.st_mode); | |
| 2036 #endif | |
| 2037 } | |
| 4391 | 2038 |
| 4378 | 2039 /* If DIR is a directory, add it to the list L. */ |
| 2040 | |
| 2041 static void | |
| 4390 | 2042 checked_dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 2043 { |
| 2044 if (dir_p (dir)) | |
| 2045 dir_list_add (l, dir); | |
| 2046 } | |
| 4392 | 2047 |
| 4378 | 2048 /* The cache. Typically, several paths have the same element; for |
| 2049 example, /usr/local/lib/texmf/fonts//. We don't want to compute the | |
| 2050 expansion of such a thing more than once. Even though we also cache | |
| 2051 the dir_links call, that's not enough -- without this path element | |
| 2052 caching as well, the execution time doubles. */ | |
| 2053 | |
| 4398 | 2054 struct cache_entry |
| 4378 | 2055 { |
| 4398 | 2056 std::string key; |
| 4378 | 2057 str_llist_type *value; |
| 4398 | 2058 }; |
| 2059 | |
| 2060 static cache_entry *the_cache = 0; | |
| 4378 | 2061 static unsigned cache_length = 0; |
| 2062 | |
| 2063 /* Associate KEY with VALUE. We implement the cache as a simple linear | |
| 2064 list, since it's unlikely to ever be more than a dozen or so elements | |
| 2065 long. We don't bother to check here if PATH has already been saved; | |
| 2066 we always add it to our list. We copy KEY but not VALUE; not sure | |
| 2067 that's right, but it seems to be all that's needed. */ | |
| 2068 | |
| 2069 static void | |
| 4398 | 2070 cache (const std::string key, str_llist_type *value) |
| 4378 | 2071 { |
| 4398 | 2072 cache_entry *new_cache = new cache_entry [cache_length+1]; |
| 2073 | |
| 4399 | 2074 for (unsigned i = 0; i < cache_length; i++) |
| 4398 | 2075 { |
| 2076 new_cache[i].key = the_cache[i].key; | |
| 2077 new_cache[i].value = the_cache[i].value; | |
| 2078 } | |
| 2079 | |
| 2080 delete [] the_cache; | |
| 2081 | |
| 2082 the_cache = new_cache; | |
| 2083 | |
| 2084 the_cache[cache_length].key = key; | |
| 2085 the_cache[cache_length].value = value; | |
| 2086 | |
| 4378 | 2087 cache_length++; |
| 2088 } | |
| 2089 | |
| 2090 /* To retrieve, just check the list in order. */ | |
| 2091 | |
| 2092 static str_llist_type * | |
| 4398 | 2093 cached (const std::string& key) |
| 4378 | 2094 { |
| 2095 unsigned p; | |
| 4391 | 2096 |
| 4378 | 2097 for (p = 0; p < cache_length; p++) |
| 2098 { | |
| 4398 | 2099 if (key == the_cache[p].key) |
| 4378 | 2100 return the_cache[p].value; |
| 2101 } | |
| 4391 | 2102 |
| 4398 | 2103 return 0; |
| 4378 | 2104 } |
| 4392 | 2105 |
| 4378 | 2106 /* Handle the magic path constructs. */ |
| 2107 | |
| 2108 /* Declare recursively called routine. */ | |
| 4398 | 2109 static void expand_elt (str_llist_type *, const std::string&, unsigned); |
| 4378 | 2110 |
| 2111 /* POST is a pointer into the original element (which may no longer be | |
| 2112 ELT) to just after the doubled DIR_SEP, perhaps to the null. Append | |
| 2113 subdirectories of ELT (up to ELT_LENGTH, which must be a /) to | |
| 2114 STR_LIST_PTR. */ | |
| 2115 | |
| 2116 #ifdef WIN32 | |
| 4398 | 2117 |
| 4378 | 2118 /* Shared across recursive calls, it acts like a stack. */ |
| 4398 | 2119 static std::string dirname; |
| 2120 | |
| 2121 #else /* WIN32 */ | |
| 2122 | |
| 2123 /* Return -1 if FN isn't a directory, else its number of links. | |
| 2124 Duplicate the call to stat; no need to incur overhead of a function | |
| 2125 call for that little bit of cleanliness. */ | |
| 2126 | |
| 2127 static int | |
| 2128 dir_links (const std::string& fn) | |
| 2129 { | |
| 2130 std::map<std::string, long> link_table; | |
| 2131 | |
| 2132 long ret; | |
| 2133 | |
| 2134 if (link_table.find (fn) != link_table.end ()) | |
| 2135 ret = link_table[fn]; | |
| 2136 else | |
| 2137 { | |
| 2138 struct stat stats; | |
| 2139 | |
| 2140 ret = stat (fn.c_str (), &stats) == 0 && S_ISDIR (stats.st_mode) | |
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2141 ? stats.st_nlink : static_cast<unsigned> (-1); |
| 4398 | 2142 |
| 2143 link_table[fn] = ret; | |
| 2144 | |
| 2145 #ifdef KPSE_DEBUG | |
| 2146 if (KPSE_DEBUG_P (KPSE_DEBUG_STAT)) | |
| 2147 DEBUGF2 ("dir_links (%s) => %ld\n", fn.c_str (), ret); | |
| 4378 | 2148 #endif |
| 4398 | 2149 } |
| 2150 | |
| 2151 return ret; | |
| 2152 } | |
| 2153 | |
| 2154 #endif /* WIN32 */ | |
| 4378 | 2155 |
| 2156 static void | |
| 4398 | 2157 do_subdir (str_llist_type *str_list_ptr, const std::string& elt, |
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2158 unsigned elt_length, const std::string& post) |
| 4378 | 2159 { |
| 2160 #ifdef WIN32 | |
| 2161 WIN32_FIND_DATA find_file_data; | |
| 2162 HANDLE hnd; | |
| 2163 int proceed; | |
| 2164 #else | |
| 2165 DIR *dir; | |
| 2166 struct dirent *e; | |
| 2167 #endif /* not WIN32 */ | |
| 4389 | 2168 |
| 4398 | 2169 std::string name = elt.substr (0, elt_length); |
| 4389 | 2170 |
| 4378 | 2171 assert (IS_DIR_SEP (elt[elt_length - 1]) |
| 2172 || IS_DEVICE_SEP (elt[elt_length - 1])); | |
| 4391 | 2173 |
| 4378 | 2174 #if defined (WIN32) |
| 4398 | 2175 |
| 2176 dirname = name + "/*.*"; /* "*.*" or "*" -- seems equivalent. */ | |
| 2177 | |
| 2178 hnd = FindFirstFile (dirname.c_str (), &find_file_data); | |
| 4378 | 2179 |
| 4389 | 2180 if (hnd == INVALID_HANDLE_VALUE) |
| 4378 | 2181 return; |
| 2182 | |
| 2183 /* Include top level before subdirectories, if nothing to match. */ | |
| 4398 | 2184 if (post.empty ()) |
| 4390 | 2185 dir_list_add (str_list_ptr, name); |
| 4398 | 2186 else |
| 2187 { | |
| 2188 /* If we do have something to match, see if it exists. For | |
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2189 example, POST might be `pk/ljfour', and they might have a |
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2190 directory `$TEXMF/fonts/pk/ljfour' that we should find. */ |
| 4398 | 2191 name += post; |
| 2192 expand_elt (str_list_ptr, name, elt_length); | |
| 2193 name.resize (elt_length); | |
| 2194 } | |
| 2195 | |
| 4378 | 2196 proceed = 1; |
| 4398 | 2197 |
| 4391 | 2198 while (proceed) |
| 2199 { | |
| 2200 if (find_file_data.cFileName[0] != '.') | |
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2201 { |
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2202 /* Construct the potential subdirectory name. */ |
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2203 name += find_file_data.cFileName; |
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2204 |
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2205 if (find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
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2206 { |
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2207 /* It's a directory, so append the separator. */ |
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2208 name += DIR_SEP_STRING; |
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2209 unsigned potential_len = name.length (); |
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2210 |
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2211 do_subdir (str_list_ptr, name, potential_len, post); |
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2212 } |
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2213 name.resize (elt_length); |
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2214 } |
| 4398 | 2215 |
| 4391 | 2216 proceed = FindNextFile (hnd, &find_file_data); |
| 4378 | 2217 } |
| 4398 | 2218 |
| 4391 | 2219 FindClose (hnd); |
| 4378 | 2220 |
| 2221 #else /* not WIN32 */ | |
| 2222 | |
| 2223 /* If we can't open it, quit. */ | |
| 10411 | 2224 dir = gnulib::opendir (name.c_str ()); |
| 4398 | 2225 |
| 2226 if (! dir) | |
| 4389 | 2227 return; |
| 4391 | 2228 |
| 4378 | 2229 /* Include top level before subdirectories, if nothing to match. */ |
| 4398 | 2230 if (post.empty ()) |
| 4390 | 2231 dir_list_add (str_list_ptr, name); |
| 4378 | 2232 else |
| 4398 | 2233 { |
| 2234 /* If we do have something to match, see if it exists. For | |
| 4378 | 2235 example, POST might be `pk/ljfour', and they might have a |
| 2236 directory `$TEXMF/fonts/pk/ljfour' that we should find. */ | |
| 4389 | 2237 name += post; |
| 4398 | 2238 expand_elt (str_list_ptr, name, elt_length); |
| 4389 | 2239 name.resize (elt_length); |
| 4378 | 2240 } |
| 2241 | |
| 4398 | 2242 while ((e = readdir (dir))) |
| 2243 { | |
| 2244 /* If it begins with a `.', never mind. (This allows ``hidden'' | |
| 4378 | 2245 directories that the algorithm won't find.) */ |
| 4398 | 2246 |
| 4378 | 2247 if (e->d_name[0] != '.') |
| 2248 { | |
| 2249 int links; | |
| 4391 | 2250 |
| 4378 | 2251 /* Construct the potential subdirectory name. */ |
| 4389 | 2252 name += e->d_name; |
| 4391 | 2253 |
| 4378 | 2254 /* If we can't stat it, or if it isn't a directory, continue. */ |
| 4398 | 2255 links = dir_links (name); |
| 4378 | 2256 |
| 2257 if (links >= 0) | |
| 4391 | 2258 { |
| 4378 | 2259 /* It's a directory, so append the separator. */ |
| 4389 | 2260 name += DIR_SEP_STRING; |
| 2261 unsigned potential_len = name.length (); | |
| 4391 | 2262 |
| 4378 | 2263 /* Should we recurse? To see if the subdirectory is a |
| 2264 leaf, check if it has two links (one for . and one for | |
| 2265 ..). This means that symbolic links to directories do | |
| 2266 not affect the leaf-ness. This is arguably wrong, but | |
| 2267 the only alternative I know of is to stat every entry | |
| 2268 in the directory, and that is unacceptably slow. | |
| 4391 | 2269 |
| 4378 | 2270 The #ifdef here makes all this configurable at |
| 2271 compile-time, so that if we're using VMS directories or | |
| 2272 some such, we can still find subdirectories, even if it | |
| 2273 is much slower. */ | |
| 2274 #ifdef ST_NLINK_TRICK | |
| 5622 | 2275 if (links != 2) |
| 4378 | 2276 #endif /* not ST_NLINK_TRICK */ |
| 2277 /* All criteria are met; find subdirectories. */ | |
| 4398 | 2278 do_subdir (str_list_ptr, name, potential_len, post); |
| 4378 | 2279 #ifdef ST_NLINK_TRICK |
| 4398 | 2280 else if (post.empty ()) |
| 4378 | 2281 /* Nothing to match, no recursive subdirectories to |
| 2282 look for: we're done with this branch. Add it. */ | |
| 4390 | 2283 dir_list_add (str_list_ptr, name); |
| 4378 | 2284 #endif |
| 2285 } | |
| 2286 | |
| 2287 /* Remove the directory entry we just checked from `name'. */ | |
| 4389 | 2288 name.resize (elt_length); |
| 4378 | 2289 } |
| 2290 } | |
| 4391 | 2291 |
| 4378 | 2292 xclosedir (dir); |
| 2293 #endif /* not WIN32 */ | |
| 2294 } | |
| 2295 | |
| 2296 /* Assume ELT is non-empty and non-NULL. Return list of corresponding | |
| 2297 directories (with no terminating NULL entry) in STR_LIST_PTR. Start | |
| 2298 looking for magic constructs at START. */ | |
| 2299 | |
| 2300 static void | |
| 4398 | 2301 expand_elt (str_llist_type *str_list_ptr, const std::string& elt, |
|
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2302 unsigned /* start */) |
| 4378 | 2303 { |
| 6306 | 2304 #if 0 |
| 2305 // We don't want magic constructs. | |
| 2306 | |
| 4398 | 2307 size_t elt_len = elt.length (); |
| 2308 | |
| 2309 size_t dir = start; | |
| 2310 | |
| 2311 | |
| 2312 while (dir < elt_len) | |
| 4378 | 2313 { |
| 4398 | 2314 if (IS_DIR_SEP (elt[dir])) |
| 4378 | 2315 { |
| 2316 /* If two or more consecutive /'s, find subdirectories. */ | |
| 4398 | 2317 if (++dir < elt_len && IS_DIR_SEP (elt[dir])) |
| 4378 | 2318 { |
|
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2319 size_t i = dir; |
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2320 while (i < elt_len && IS_DIR_SEP (elt[i])) |
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2321 i++; |
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2322 |
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2323 std::string post = elt.substr (i); |
| 4398 | 2324 |
| 2325 do_subdir (str_list_ptr, elt, dir, post); | |
| 2326 | |
|
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2327 return; |
| 4378 | 2328 } |
| 2329 | |
| 2330 /* No special stuff at this slash. Keep going. */ | |
| 2331 } | |
| 4398 | 2332 else |
|
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2333 dir++; |
| 4378 | 2334 } |
| 6306 | 2335 #endif |
| 4391 | 2336 |
| 4378 | 2337 /* When we reach the end of ELT, it will be a normal filename. */ |
| 2338 checked_dir_list_add (str_list_ptr, elt); | |
| 2339 } | |
| 4392 | 2340 |
| 4378 | 2341 /* Here is the entry point. Returns directory list for ELT. */ |
| 2342 | |
| 4399 | 2343 /* Given a path element ELT, return a pointer to a NULL-terminated list |
| 2344 of the corresponding (existing) directory or directories, with | |
| 2345 trailing slashes, or NULL. If ELT is the empty string, check the | |
| 2346 current working directory. | |
| 2347 | |
| 2348 It's up to the caller to expand ELT. This is because this routine is | |
| 2349 most likely only useful to be called from `kpse_path_search', which | |
| 2350 has already assumed expansion has been done. */ | |
| 2351 | |
| 2352 static str_llist_type * | |
| 4398 | 2353 kpse_element_dirs (const std::string& elt) |
| 4378 | 2354 { |
| 2355 str_llist_type *ret; | |
| 2356 | |
| 2357 /* If given nothing, return nothing. */ | |
| 4398 | 2358 if (elt.empty ()) |
| 2359 return 0; | |
| 4378 | 2360 |
| 2361 /* If we've already cached the answer for ELT, return it. */ | |
| 2362 ret = cached (elt); | |
| 2363 if (ret) | |
| 2364 return ret; | |
| 2365 | |
| 2366 /* We're going to have a real directory list to return. */ | |
| 4390 | 2367 ret = new str_llist_type; |
| 4398 | 2368 *ret = 0; |
| 4378 | 2369 |
| 2370 /* We handle the hard case in a subroutine. */ | |
| 2371 expand_elt (ret, elt, 0); | |
| 2372 | |
| 2373 /* Remember the directory list we just found, in case future calls are | |
| 2374 made with the same ELT. */ | |
| 2375 cache (elt, ret); | |
| 2376 | |
| 2377 #ifdef KPSE_DEBUG | |
| 2378 if (KPSE_DEBUG_P (KPSE_DEBUG_EXPAND)) | |
| 2379 { | |
| 4398 | 2380 DEBUGF1 ("path element %s =>", elt.c_str ()); |
| 4378 | 2381 if (ret) |
| 2382 { | |
| 2383 str_llist_elt_type *e; | |
| 2384 for (e = *ret; e; e = STR_LLIST_NEXT (*e)) | |
| 10411 | 2385 gnulib::fprintf (stderr, " %s", (STR_LLIST (*e)).c_str ()); |
| 4378 | 2386 } |
| 10411 | 2387 gnulib::putc ('\n', stderr); |
| 4378 | 2388 fflush (stderr); |
| 2389 } | |
| 2390 #endif /* KPSE_DEBUG */ | |
| 2391 | |
| 2392 return ret; | |
| 2393 } | |
| 2394 | |
| 4386 | 2395 #ifndef WIN32 |
| 4385 | 2396 void |
| 2397 xclosedir (DIR *d) | |
| 2398 { | |
| 10411 | 2399 int ret = gnulib::closedir (d); |
| 4391 | 2400 |
| 4385 | 2401 if (ret != 0) |
| 2402 FATAL ("closedir failed"); | |
| 2403 } | |
| 4386 | 2404 #endif |
| 4385 | 2405 |
| 4399 | 2406 /* Help the user discover what's going on. */ |
| 4385 | 2407 |
| 2408 #ifdef KPSE_DEBUG | |
| 2409 | |
| 2410 /* If the real definitions of fopen or fclose are macros, we lose -- the | |
| 2411 #undef won't restore them. */ | |
| 2412 | |
| 4399 | 2413 static FILE * |
| 4385 | 2414 fopen (const char *filename, const char *mode) |
| 2415 { | |
| 2416 #undef fopen | |
| 2417 FILE *ret = fopen (filename, mode); | |
| 2418 | |
| 2419 if (KPSE_DEBUG_P (KPSE_DEBUG_FOPEN)) | |
| 5760 | 2420 DEBUGF3 ("fopen (%s, %s) => 0x%lx\n", filename, mode, |
|
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2421 reinterpret_cast<unsigned long> (ret)); |
| 4385 | 2422 |
| 2423 return ret; | |
| 2424 } | |
| 2425 | |
| 2426 #endif | |
| 2427 | |
| 4399 | 2428 /* Implementation of a linked list of strings. */ |
| 4385 | 2429 |
| 2430 /* Add the new string STR to the end of the list L. */ | |
| 2431 | |
| 5085 | 2432 static void |
| 4390 | 2433 str_llist_add (str_llist_type *l, const std::string& str) |
| 4385 | 2434 { |
| 2435 str_llist_elt_type *e; | |
| 4390 | 2436 str_llist_elt_type *new_elt = new str_llist_elt_type; |
| 4391 | 2437 |
| 4385 | 2438 /* The new element will be at the end of the list. */ |
| 2439 STR_LLIST (*new_elt) = str; | |
| 2440 STR_LLIST_MOVED (*new_elt) = 0; | |
| 4398 | 2441 STR_LLIST_NEXT (*new_elt) = 0; |
| 4391 | 2442 |
| 4385 | 2443 /* Find the current end of the list. */ |
| 2444 for (e = *l; e && STR_LLIST_NEXT (*e); e = STR_LLIST_NEXT (*e)) | |
| 2445 ; | |
| 4391 | 2446 |
| 2447 if (! e) | |
| 4385 | 2448 *l = new_elt; |
| 2449 else | |
| 2450 STR_LLIST_NEXT (*e) = new_elt; | |
| 2451 } | |
| 4392 | 2452 |
| 4385 | 2453 /* Move an element towards the top. The idea is that when a file is |
| 2454 found in a given directory, later files will likely be in that same | |
| 2455 directory, and looking for the file in all the directories in between | |
| 2456 is thus a waste. */ | |
| 2457 | |
| 5085 | 2458 static void |
| 4385 | 2459 str_llist_float (str_llist_type *l, str_llist_elt_type *mover) |
| 2460 { | |
| 2461 str_llist_elt_type *last_moved, *unmoved; | |
| 4391 | 2462 |
| 4385 | 2463 /* If we've already moved this element, never mind. */ |
| 2464 if (STR_LLIST_MOVED (*mover)) | |
| 2465 return; | |
| 4391 | 2466 |
| 4385 | 2467 /* Find the first unmoved element (to insert before). We're |
| 2468 guaranteed this will terminate, since MOVER itself is currently | |
| 2469 unmoved, and it must be in L (by hypothesis). */ | |
| 4398 | 2470 for (last_moved = 0, unmoved = *l; STR_LLIST_MOVED (*unmoved); |
| 4385 | 2471 last_moved = unmoved, unmoved = STR_LLIST_NEXT (*unmoved)) |
| 2472 ; | |
| 2473 | |
| 2474 /* If we are the first unmoved element, nothing to relink. */ | |
| 2475 if (unmoved != mover) | |
| 2476 { /* Remember `mover's current successor, so we can relink `mover's | |
| 2477 predecessor to it. */ | |
| 2478 str_llist_elt_type *before_mover; | |
| 2479 str_llist_elt_type *after_mover = STR_LLIST_NEXT (*mover); | |
| 4391 | 2480 |
| 4385 | 2481 /* Find `mover's predecessor. */ |
| 2482 for (before_mover = unmoved; STR_LLIST_NEXT (*before_mover) != mover; | |
| 2483 before_mover = STR_LLIST_NEXT (*before_mover)) | |
| 2484 ; | |
| 4391 | 2485 |
| 4385 | 2486 /* `before_mover' now links to `after_mover'. */ |
| 2487 STR_LLIST_NEXT (*before_mover) = after_mover; | |
| 2488 | |
| 2489 /* Insert `mover' before `unmoved' and after `last_moved' (or at | |
| 2490 the head of the list). */ | |
| 2491 STR_LLIST_NEXT (*mover) = unmoved; | |
| 4391 | 2492 if (! last_moved) |
| 4385 | 2493 *l = mover; |
| 2494 else | |
| 2495 STR_LLIST_NEXT (*last_moved) = mover; | |
| 2496 } | |
| 2497 | |
| 2498 /* We've moved it. */ | |
| 2499 STR_LLIST_MOVED (*mover) = 1; | |
| 2500 } | |
| 2501 | |
| 4399 | 2502 /* Variable expansion. */ |
| 4385 | 2503 |
| 2504 /* We have to keep track of variables being expanded, otherwise | |
| 2505 constructs like TEXINPUTS = $TEXINPUTS result in an infinite loop. | |
| 2506 (Or indirectly recursive variables, etc.) Our simple solution is to | |
| 2507 add to a list each time an expansion is started, and check the list | |
| 2508 before expanding. */ | |
| 2509 | |
| 4391 | 2510 static std::map <std::string, bool> expansions; |
| 4385 | 2511 |
| 2512 static void | |
| 4391 | 2513 expanding (const std::string& var, bool xp) |
| 4385 | 2514 { |
| 4391 | 2515 expansions[var] = xp; |
| 4385 | 2516 } |
| 2517 | |
| 2518 /* Return whether VAR is currently being expanding. */ | |
| 2519 | |
| 4391 | 2520 static bool |
| 2521 expanding_p (const std::string& var) | |
| 4385 | 2522 { |
| 4391 | 2523 return (expansions.find (var) != expansions.end ()) |
| 2524 ? expansions[var] : false; | |
| 4385 | 2525 } |
| 4392 | 2526 |
| 4385 | 2527 /* Append the result of value of `var' to EXPANSION, where `var' begins |
| 2528 at START and ends at END. If `var' is not set, do not complain. | |
| 2529 This is a subroutine for the more complicated expansion function. */ | |
| 2530 | |
| 2531 static void | |
| 4391 | 2532 expand (std::string &expansion, const std::string& var) |
| 4385 | 2533 { |
| 4391 | 2534 if (expanding_p (var)) |
| 2535 { | |
| 4396 | 2536 (*current_liboctave_warning_handler) |
|
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2537 ("kpathsea: variable `%s' references itself (eventually)", |
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2538 var.c_str ()); |
| 4385 | 2539 } |
| 4391 | 2540 else |
| 2541 { | |
| 2542 /* Check for an environment variable. */ | |
| 2543 std::string value = octave_env::getenv (var); | |
| 2544 | |
| 2545 if (! value.empty ()) | |
|
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2546 { |
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2547 expanding (var, true); |
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2548 std::string tmp = kpse_var_expand (value); |
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2549 expanding (var, false); |
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2550 expansion += tmp; |
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2551 } |
| 4391 | 2552 } |
| 4385 | 2553 } |
| 4392 | 2554 |
| 4385 | 2555 /* Can't think of when it would be useful to change these (and the |
| 2556 diagnostic messages assume them), but ... */ | |
| 2557 #ifndef IS_VAR_START /* starts all variable references */ | |
| 2558 #define IS_VAR_START(c) ((c) == '$') | |
| 2559 #endif | |
| 2560 #ifndef IS_VAR_CHAR /* variable name constituent */ | |
| 2561 #define IS_VAR_CHAR(c) (isalnum (c) || (c) == '_') | |
| 2562 #endif | |
| 2563 #ifndef IS_VAR_BEGIN_DELIMITER /* start delimited variable name (after $) */ | |
| 2564 #define IS_VAR_BEGIN_DELIMITER(c) ((c) == '{') | |
| 2565 #endif | |
| 2566 #ifndef IS_VAR_END_DELIMITER | |
| 2567 #define IS_VAR_END_DELIMITER(c) ((c) == '}') | |
| 2568 #endif | |
| 2569 | |
| 2570 /* Maybe we should support some or all of the various shell ${...} | |
| 2571 constructs, especially ${var-value}. */ | |
| 2572 | |
| 5085 | 2573 static std::string |
| 4391 | 2574 kpse_var_expand (const std::string& src) |
| 4385 | 2575 { |
| 4389 | 2576 std::string expansion; |
| 4391 | 2577 |
| 2578 size_t src_len = src.length (); | |
| 2579 | |
| 4385 | 2580 /* Copy everything but variable constructs. */ |
| 4391 | 2581 for (size_t i = 0; i < src_len; i++) |
| 2582 { | |
| 2583 if (IS_VAR_START (src[i])) | |
|
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2584 { |
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2585 i++; |
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2586 |
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2587 /* Three cases: `$VAR', `${VAR}', `$<anything-else>'. */ |
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2588 if (IS_VAR_CHAR (src[i])) |
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2589 { |
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2590 /* $V: collect name constituents, then expand. */ |
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2591 size_t var_end = i; |
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2592 |
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2593 do |
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2594 { |
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2595 var_end++; |
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2596 } |
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2597 while (IS_VAR_CHAR (src[var_end])); |
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2598 |
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2599 var_end--; /* had to go one past */ |
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2600 expand (expansion, src.substr (i, var_end - i + 1)); |
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2601 i = var_end; |
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2602 |
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2603 } |
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2604 else if (IS_VAR_BEGIN_DELIMITER (src[i])) |
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2605 { |
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2606 /* ${: scan ahead for matching delimiter, then expand. */ |
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2607 size_t var_end = ++i; |
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2608 |
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2609 while (var_end < src_len && !IS_VAR_END_DELIMITER (src[var_end])) |
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2610 var_end++; |
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2611 |
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2612 if (var_end == src_len) |
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2613 { |
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2614 (*current_liboctave_warning_handler) |
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2615 ("%s: No matching } for ${", src.c_str ()); |
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2616 i = var_end - 1; /* will incr to eos at top of loop */ |
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2617 } |
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2618 else |
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2619 { |
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2620 expand (expansion, src.substr (i, var_end - i)); |
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2621 i = var_end; /* will incr past } at top of loop*/ |
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2622 } |
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2623 } |
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2624 else |
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2625 { |
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2626 /* $<something-else>: error. */ |
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2627 (*current_liboctave_warning_handler) |
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2628 ("%s: Unrecognized variable construct `$%c'", |
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2629 src.c_str (), src[i]); |
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2630 |
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2631 /* Just ignore those chars and keep going. */ |
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2632 } |
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2633 } |
| 4391 | 2634 else |
|
10314
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2635 expansion += src[i]; |
| 4391 | 2636 } |
| 4389 | 2637 |
| 2638 return expansion; | |
| 4385 | 2639 } |