Mercurial > octave-nkf
annotate liboctave/util/kpse.cc @ 19898:17d647821d61
maint: More cleanup of C++ code to follow Octave coding conventions.
* gl-select.cc, betainc.cc, bitfcns.cc, bsxfun.cc, gl-render.cc,
graphics.cc, load-save.cc, ls-mat-ascii.cc, ls-mat5.cc, lu.cc,
oct-stream.cc, symtab.cc, variables.cc, __eigs__.cc,
__magick_read__.cc, chol.cc, ov-base-sparse.cc, ov-class.cc,
ov-classdef.cc, ov-fcn-inline.cc, ov-perm.cc, ov.cc, CMatrix.cc,
CSparse.cc, MSparse.cc, MatrixType.cc, MatrixType.h, dMatrix.cc,
dSparse.cc, fCMatrix.cc, fMatrix.cc, eigs-base.cc, lo-sysdep.cc,
kpse.cc: Break long lines before && and ||.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 26 Feb 2015 13:07:04 -0500 |
| parents | 4197fc428c7d |
| children | 4b7b7ac7af2c |
| 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 |
|
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6 Copyright (C) 2003-2015 John W. Eaton |
| 4385 | 7 Copyright (C) 1993, 94, 95, 96, 97, 98 Karl Berry. |
| 4378 | 8 Copyright (C) 1993, 94, 95, 96, 97 Karl Berry & O. Weber. |
| 4399 | 9 Copyright (C) 1992, 93, 94, 95, 96, 97 Free Software Foundation, Inc. |
| 4378 | 10 |
| 16768 | 11 This file is part of Octave. |
| 12 | |
| 13 Octave is free software; you can redistribute it and/or modify it | |
| 14 under the terms of the GNU General Public License as published by the | |
| 15 Free Software Foundation; either version 3 of the License, or (at your | |
| 16 option) any later version. | |
| 17 | |
| 18 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 19 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 20 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 21 for more details. | |
| 22 | |
| 23 You should have received a copy of the GNU General Public License | |
| 24 along with Octave; see the file COPYING. If not, see | |
| 25 <http://www.gnu.org/licenses/>. | |
| 26 | |
| 27 */ | |
| 4378 | 28 |
| 29 #if defined (HAVE_CONFIG_H) | |
| 30 #include <config.h> | |
| 31 #endif | |
| 32 | |
| 4390 | 33 #include <map> |
| 4389 | 34 #include <string> |
| 35 | |
| 4399 | 36 /* System defines are for non-Unix systems only. (Testing for all Unix |
| 37 variations should be done in configure.) Presently the defines used | |
| 38 are: DOS OS2 WIN32. I do not use any of these systems | |
| 39 myself; if you do, I'd be grateful for any changes. --kb@mail.tug.org */ | |
| 40 | |
| 41 /* If we have either DOS or OS2, we are DOSISH. */ | |
|
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42 #if defined (DOS) || defined (OS2) || defined (WIN32) || defined (__MSDOS__) |
| 4399 | 43 #define DOSISH |
| 44 #endif | |
| 45 | |
| 46 #if defined (DOSISH) | |
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47 #define MONOCASE_FILENAMES /* case-insensitive filename comparisons */ |
| 4399 | 48 #endif |
| 49 | |
| 50 extern "C" { | |
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51 #if defined (__MINGW32__) |
| 4399 | 52 #include <windows.h> |
| 53 #include <fcntl.h> | |
| 54 #include <dirent.h> | |
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55 #elif defined (WIN32) |
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56 #ifndef _MSC_VER |
| 4399 | 57 #define __STDC__ 1 |
| 58 #include "win32lib.h" | |
| 6106 | 59 #endif |
| 4399 | 60 #endif /* not WIN32 */ |
| 61 | |
| 62 #ifdef __DJGPP__ | |
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63 #include <fcntl.h> /* for long filenames' stuff */ |
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64 #include <dir.h> /* for 'getdisk' */ |
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65 #include <io.h> /* for 'setmode' */ |
| 4399 | 66 #endif |
| 67 } | |
| 68 | |
| 69 /* Some drivers have partially integrated kpathsea changes. */ | |
| 70 #ifndef KPATHSEA | |
| 71 #define KPATHSEA 32 | |
| 72 #endif | |
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73 |
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74 /* System dependencies that are figured out by 'configure'. If we are |
| 4399 | 75 compiling standalone, we get our c-auto.h. Otherwise, the package |
| 76 containing us must provide this (unless it can somehow generate ours | |
| 77 from c-auto.in). We use <...> instead of "..." so that the current | |
| 78 cpp directory (i.e., kpathsea/) won't be searched. */ | |
| 79 | |
| 80 /* If you want to find subdirectories in a directory with non-Unix | |
| 81 semantics (specifically, if a directory with no subdirectories does | |
| 5622 | 82 not have exactly two links), define this. */ |
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83 #if defined (__DJGPP__) || ! defined (DOSISH) |
| 4399 | 84 /* Surprise! DJGPP returns st_nlink exactly like on Unix. */ |
| 85 #define ST_NLINK_TRICK | |
| 86 #endif /* either not DOSISH or __DJGPP__ */ | |
| 87 | |
| 88 #ifdef OS2 | |
| 89 #define access ln_access | |
| 90 #define fopen ln_fopen | |
| 91 #define rename ln_rename | |
| 92 #define stat ln_stat | |
| 93 #endif /* OS2 */ | |
| 94 | |
| 11236 | 95 /* Define the characters which separate components of |
| 96 filenames and environment variable paths. */ | |
| 97 | |
| 98 /* What separates filename components? */ | |
| 99 #ifndef DIR_SEP | |
| 100 #ifdef DOSISH | |
| 101 /* Either \'s or 's work. Wayne Sullivan's web2pc prefers /, so we'll | |
| 102 go with that. */ | |
| 103 #define DIR_SEP '/' | |
| 104 #define DIR_SEP_STRING "/" | |
| 105 #define IS_DEVICE_SEP(ch) ((ch) == ':') | |
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106 #define NAME_BEGINS_WITH_DEVICE(name) ((name.length ()>0) && IS_DEVICE_SEP((name)[1])) |
| 11236 | 107 /* On DOS, it's good to allow both \ and / between directories. */ |
| 108 #define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\') | |
| 109 #else | |
| 110 #define DIR_SEP '/' | |
| 111 #define DIR_SEP_STRING "/" | |
| 112 #endif /* not DOSISH */ | |
| 113 #endif /* not DIR_SEP */ | |
| 114 | |
| 115 #ifndef IS_DIR_SEP | |
| 116 #define IS_DIR_SEP(ch) ((ch) == DIR_SEP) | |
| 117 #endif | |
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118 #ifndef IS_DEVICE_SEP /* No 'devices' on, e.g., Unix. */ |
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119 #define IS_DEVICE_SEP(ch) 0 |
| 11236 | 120 #endif |
| 121 #ifndef NAME_BEGINS_WITH_DEVICE | |
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122 #define NAME_BEGINS_WITH_DEVICE(name) 0 |
| 11236 | 123 #endif |
| 4378 | 124 |
| 4396 | 125 #include "lo-error.h" |
| 4391 | 126 #include "oct-env.h" |
| 127 #include "oct-passwd.h" | |
| 4399 | 128 #include "str-vec.h" |
| 4385 | 129 |
| 130 /* Header files that essentially all of our sources need, and | |
| 131 that all implementations have. We include these first, to help with | |
| 132 NULL being defined multiple times. */ | |
| 133 #include <cstdio> | |
| 134 #include <cstdarg> | |
| 135 #include <cstdlib> | |
| 136 #include <cerrno> | |
| 137 #include <cassert> | |
| 138 | |
| 139 #include <sys/types.h> | |
| 140 #include <unistd.h> | |
| 141 | |
| 142 #include "sysdir.h" | |
| 143 #include "statdefs.h" | |
| 144 | |
| 145 /* define NAME_MAX, the maximum length of a single | |
| 146 component in a filename. No such limit may exist, or may vary | |
| 147 depending on the filesystem. */ | |
| 148 | |
| 149 /* Most likely the system will truncate filenames if it is not POSIX, | |
| 150 and so we can use the BSD value here. */ | |
| 151 #ifndef _POSIX_NAME_MAX | |
| 152 #define _POSIX_NAME_MAX 255 | |
| 153 #endif | |
| 154 | |
| 155 #ifndef NAME_MAX | |
| 156 #define NAME_MAX _POSIX_NAME_MAX | |
| 157 #endif | |
| 158 | |
| 159 #include <cctype> | |
| 160 | |
| 161 /* What separates elements in environment variable path lists? */ | |
| 162 #ifndef ENV_SEP | |
| 5451 | 163 #if defined (SEPCHAR) && defined (SEPCHAR_STR) |
| 164 #define ENV_SEP SEPCHAR | |
| 165 #define ENV_SEP_STRING SEPCHAR_STR | |
| 166 #elif defined (DOSISH) | |
| 4385 | 167 #define ENV_SEP ';' |
| 168 #define ENV_SEP_STRING ";" | |
| 169 #else | |
| 170 #define ENV_SEP ':' | |
| 171 #define ENV_SEP_STRING ":" | |
| 172 #endif /* not DOS */ | |
| 173 #endif /* not ENV_SEP */ | |
| 174 | |
| 175 #ifndef IS_ENV_SEP | |
| 176 #define IS_ENV_SEP(ch) ((ch) == ENV_SEP) | |
| 177 #endif | |
| 178 | |
| 4399 | 179 /* define PATH_MAX, the maximum length of a filename. Since no such |
| 180 limit may exist, it's preferable to dynamically grow filenames as | |
| 181 needed. */ | |
| 4385 | 182 |
| 183 /* Cheat and define this as a manifest constant no matter what, instead | |
| 184 of using pathconf. I forget why we want to do this. */ | |
| 185 | |
| 186 #ifndef _POSIX_PATH_MAX | |
| 187 #define _POSIX_PATH_MAX 255 | |
| 188 #endif | |
| 189 | |
| 190 #ifndef PATH_MAX | |
| 191 #ifdef MAXPATHLEN | |
| 192 #define PATH_MAX MAXPATHLEN | |
| 193 #else | |
| 194 #define PATH_MAX _POSIX_PATH_MAX | |
| 195 #endif | |
| 196 #endif /* not PATH_MAX */ | |
| 197 | |
| 198 /* If NO_DEBUG is defined (not recommended), skip all this. */ | |
| 199 #ifndef NO_DEBUG | |
| 200 | |
| 201 /* OK, we'll have tracing support. */ | |
| 202 #define KPSE_DEBUG | |
| 203 | |
| 204 /* Test if a bit is on. */ | |
| 205 #define KPSE_DEBUG_P(bit) (kpathsea_debug & (1 << (bit))) | |
| 206 | |
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207 #define KPSE_DEBUG_STAT 0 /* stat calls */ |
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208 #define KPSE_DEBUG_HASH 1 /* hash lookups */ |
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209 #define KPSE_DEBUG_FOPEN 2 /* fopen/fclose calls */ |
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210 #define KPSE_DEBUG_PATHS 3 /* search path initializations */ |
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211 #define KPSE_DEBUG_EXPAND 4 /* path element expansion */ |
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212 #define KPSE_DEBUG_SEARCH 5 /* searches */ |
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213 #define KPSE_DEBUG_VARS 6 /* variable values */ |
| 4385 | 214 #define KPSE_LAST_DEBUG KPSE_DEBUG_VARS |
| 215 | |
| 216 /* A printf for the debugging. */ | |
| 10411 | 217 #define DEBUGF_START() do { gnulib::fputs ("kdebug:", stderr) |
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218 #define DEBUGF_END() gnulib::fflush (stderr); } while (0) |
| 4385 | 219 |
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220 #define DEBUGF(str) \ |
| 10411 | 221 DEBUGF_START (); gnulib::fputs (str, stderr); DEBUGF_END () |
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222 #define DEBUGF1(str, e1) \ |
| 10411 | 223 DEBUGF_START (); gnulib::fprintf (stderr, str, e1); DEBUGF_END () |
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224 #define DEBUGF2(str, e1, e2) \ |
| 10411 | 225 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2); DEBUGF_END () |
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226 #define DEBUGF3(str, e1, e2, e3) \ |
| 10411 | 227 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3); DEBUGF_END () |
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228 #define DEBUGF4(str, e1, e2, e3, e4) \ |
| 10411 | 229 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3, e4); DEBUGF_END () |
| 4385 | 230 |
| 231 #endif /* not NO_DEBUG */ | |
| 232 | |
| 4399 | 233 #ifdef KPSE_DEBUG |
| 234 static unsigned int kpathsea_debug = 0; | |
| 235 #endif | |
| 236 | |
| 4385 | 237 #if defined (WIN32) && !defined (__MINGW32__) |
| 238 | |
| 239 /* System description file for Windows NT. */ | |
| 240 | |
| 241 /* | |
| 242 * Define symbols to identify the version of Unix this is. | |
| 243 * Define all the symbols that apply correctly. | |
| 244 */ | |
| 245 | |
| 246 #ifndef DOSISH | |
| 247 #define DOSISH | |
| 248 #endif | |
| 249 | |
| 250 #ifndef MAXPATHLEN | |
| 251 #define MAXPATHLEN _MAX_PATH | |
| 4378 | 252 #endif |
| 253 | |
| 4385 | 254 /* These have to be defined because our compilers treat __STDC__ as being |
| 255 defined (most of them anyway). */ | |
| 256 | |
| 257 #define access _access | |
| 258 #define stat _stat | |
| 259 #define strdup _strdup | |
| 260 | |
| 261 #define S_IFMT _S_IFMT | |
| 262 #define S_IFDIR _S_IFDIR | |
| 263 | |
| 264 /* Define this so that winsock.h definitions don't get included when | |
| 265 windows.h is... For this to have proper effect, config.h must | |
| 4391 | 266 always be included before windows.h. */ |
| 4385 | 267 #define _WINSOCKAPI_ 1 |
| 268 | |
| 269 #include <windows.h> | |
| 270 | |
| 271 /* For proper declaration of environ. */ | |
| 272 #include <io.h> | |
| 273 #include <fcntl.h> | |
| 274 #include <process.h> | |
| 275 | |
| 276 /* ============================================================ */ | |
| 277 | |
| 278 #endif /* WIN32 */ | |
| 279 | |
| 280 /* Define common sorts of messages. */ | |
| 281 | |
| 282 /* This should be called only after a system call fails. Don't exit | |
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283 with status 'errno', because that might be 256, which would mean |
| 4385 | 284 success (exit statuses are truncated to eight bits). */ |
| 4396 | 285 #define FATAL_PERROR(str) \ |
| 286 do \ | |
| 287 { \ | |
| 10411 | 288 gnulib::fputs ("pathsearch: ", stderr); \ |
| 4396 | 289 perror (str); exit (EXIT_FAILURE); \ |
| 290 } \ | |
| 291 while (0) | |
| 292 | |
| 293 #define FATAL(str) \ | |
| 294 do \ | |
| 295 { \ | |
| 10411 | 296 gnulib::fputs ("pathsearch: fatal: ", stderr); \ |
| 297 gnulib::fputs (str, stderr); \ | |
| 298 gnulib::fputs (".\n", stderr); \ | |
| 4396 | 299 exit (1); \ |
| 300 } \ | |
| 301 while (0) | |
| 4385 | 302 |
| 4386 | 303 #ifndef WIN32 |
| 4385 | 304 static void xclosedir (DIR *d); |
| 4386 | 305 #endif |
| 4385 | 306 |
| 4399 | 307 /* It's a little bizarre to be using the same type for the list and the |
| 308 elements of the list, but no reason not to in this case, I think -- | |
| 309 we never need a NULL string in the middle of the list, and an extra | |
| 310 NULL/NULL element always at the end is inconsequential. */ | |
| 311 | |
| 312 struct str_llist_elt | |
| 313 { | |
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314 str_llist_elt (void) : str (), moved (0), next (0) { } |
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315 |
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316 ~str_llist_elt (void) { } |
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317 |
| 4399 | 318 std::string str; |
| 319 int moved; | |
| 320 struct str_llist_elt *next; | |
| 321 }; | |
| 322 | |
| 323 typedef str_llist_elt str_llist_elt_type; | |
| 324 typedef str_llist_elt *str_llist_type; | |
| 325 | |
| 326 #define STR_LLIST(sl) ((sl).str) | |
| 327 #define STR_LLIST_MOVED(sl) ((sl).moved) | |
| 328 #define STR_LLIST_NEXT(sl) ((sl).next) | |
| 329 | |
| 4390 | 330 static void str_llist_add (str_llist_type *l, const std::string& str); |
| 4385 | 331 |
| 332 static void str_llist_float (str_llist_type *l, str_llist_elt_type *mover); | |
| 333 | |
| 4389 | 334 static std::string kpse_var_expand (const std::string& src); |
| 4385 | 335 |
| 4399 | 336 static str_llist_type *kpse_element_dirs (const std::string& elt); |
| 337 | |
| 338 static std::string kpse_expand (const std::string& s); | |
| 339 | |
| 340 static std::string kpse_expand_default (const std::string& path, | |
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341 const std::string& dflt); |
| 4399 | 342 |
| 343 static string_vector kpse_db_search (const std::string& name, | |
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344 const std::string& path_elt, bool all); |
| 4399 | 345 |
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346 #include <ctime> /* for 'time' */ |
| 4385 | 347 |
| 4399 | 348 static bool |
| 4394 | 349 kpse_is_env_sep (char c) |
| 350 { | |
| 351 return IS_ENV_SEP (c); | |
| 352 } | |
| 353 | |
| 4392 | 354 /* These routines just check the return status from standard library |
| 355 routines and abort if an error happens. */ | |
| 356 | |
| 357 static FILE * | |
| 4393 | 358 xfopen (const std::string& filename, const char *mode) |
| 4392 | 359 { |
| 360 FILE *f; | |
| 361 | |
| 4393 | 362 assert (! filename.empty () && mode); |
| 363 | |
| 14153 | 364 f = gnulib::fopen (filename.c_str (), mode); |
| 4393 | 365 |
| 366 if (! f) | |
| 367 FATAL_PERROR (filename.c_str ()); | |
| 4392 | 368 |
| 14153 | 369 if (KPSE_DEBUG_P (KPSE_DEBUG_FOPEN)) |
| 370 DEBUGF3 ("fopen (%s, %s) => 0x%lx\n", filename.c_str (), mode, | |
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371 reinterpret_cast<intptr_t> (f)); |
| 14153 | 372 |
| 4392 | 373 return f; |
| 374 } | |
| 375 | |
| 376 /* A single (key,value) pair. */ | |
| 377 | |
| 378 struct hash_element_type | |
| 379 { | |
| 380 std::string key; | |
| 381 std::string value; | |
| 382 struct hash_element_type *next; | |
| 383 }; | |
| 384 | |
| 385 /* The usual arrangement of buckets initialized to null. */ | |
| 386 | |
| 387 struct hash_table_type | |
| 388 { | |
| 389 hash_element_type **buckets; | |
| 390 unsigned size; | |
| 391 }; | |
| 392 | |
| 393 static unsigned | |
| 5764 | 394 kpse_hash (hash_table_type table, const std::string& key) |
| 4392 | 395 { |
| 396 unsigned n = 0; | |
| 397 | |
| 398 /* Our keys aren't often anagrams of each other, so no point in | |
| 399 weighting the characters. */ | |
| 400 size_t len = key.length (); | |
| 401 for (size_t i = 0; i < len; i++) | |
| 4394 | 402 n = (n + n + key[i]) % table.size; |
| 4392 | 403 |
| 404 return n; | |
| 405 } | |
| 406 | |
| 407 /* Look up STR in MAP. Return a (dynamically-allocated) list of the | |
| 408 corresponding strings or NULL if no match. */ | |
| 409 | |
| 410 static string_vector | |
| 411 hash_lookup (hash_table_type table, const std::string& key) | |
| 412 { | |
| 413 hash_element_type *p; | |
| 414 string_vector ret; | |
| 5764 | 415 unsigned n = kpse_hash (table, key); |
| 4392 | 416 |
| 417 /* Look at everything in this bucket. */ | |
| 4398 | 418 for (p = table.buckets[n]; p; p = p->next) |
| 4394 | 419 if (key == p->key) |
| 4392 | 420 ret.append (p->value); |
| 421 | |
| 422 #ifdef KPSE_DEBUG | |
| 423 if (KPSE_DEBUG_P (KPSE_DEBUG_HASH)) | |
| 424 { | |
| 425 DEBUGF1 ("hash_lookup (%s) =>", key.c_str ()); | |
| 426 if (ret.empty ()) | |
| 10411 | 427 gnulib::fputs (" (nil)\n", stderr); |
| 4392 | 428 else |
| 429 { | |
|
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430 int len = ret.length (); |
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431 for (int i = 0; i < len; i++) |
| 4392 | 432 { |
| 10411 | 433 gnulib::putc (' ', stderr); |
| 434 gnulib::fputs (ret[i].c_str (), stderr); | |
| 4392 | 435 } |
| 10411 | 436 gnulib::putc ('\n', stderr); |
| 4392 | 437 } |
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438 gnulib::fflush (stderr); |
| 4392 | 439 } |
| 440 #endif | |
| 441 | |
| 442 return ret; | |
| 443 } | |
| 444 | |
| 4399 | 445 /* A way to step through a path, extracting one directory name at a |
| 446 time. */ | |
| 447 | |
| 448 class kpse_path_iterator | |
| 449 { | |
| 450 public: | |
| 451 | |
| 452 kpse_path_iterator (const std::string& p) | |
| 453 : path (p), b (0), e (0), len (path.length ()) { set_end (); } | |
| 454 | |
| 455 kpse_path_iterator (const kpse_path_iterator& pi) | |
| 456 : path (pi.path), b (pi.b), e (pi.e), len (pi.len) { } | |
| 457 | |
| 458 kpse_path_iterator operator ++ (int) | |
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459 { |
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460 kpse_path_iterator retval (*this); |
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461 next (); |
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462 return retval; |
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463 } |
| 4399 | 464 |
| 465 std::string operator * (void) { return path.substr (b, e-b); } | |
| 466 | |
| 467 bool operator != (const size_t sz) { return b != sz; } | |
| 468 | |
| 469 private: | |
| 470 | |
| 471 const std::string& path; | |
| 472 size_t b; | |
| 473 size_t e; | |
| 474 size_t len; | |
| 475 | |
| 476 void set_end (void) | |
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477 { |
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478 e = b + 1; |
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479 |
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480 if (e == len) |
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481 ; /* OK, we have found the last element. */ |
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482 else if (e > len) |
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483 b = e = std::string::npos; |
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484 else |
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485 { |
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486 /* Find the next colon not enclosed by braces (or the end of |
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487 the path). */ |
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488 |
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489 int brace_level = 0; |
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490 while (e < len && ! (brace_level == 0 && kpse_is_env_sep (path[e]))) |
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491 e++; |
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492 } |
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493 } |
| 4399 | 494 |
| 495 void next (void) | |
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496 { |
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497 b = e + 1; |
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498 |
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499 /* Skip any consecutive colons. */ |
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500 while (b < len && kpse_is_env_sep (path[b])) |
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501 b++; |
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502 |
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503 if (b >= len) |
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504 b = e = std::string::npos; |
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505 else |
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506 set_end (); |
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507 } |
| 5617 | 508 |
| 509 // No assignment. | |
| 510 kpse_path_iterator& operator = (const kpse_path_iterator&); | |
| 4399 | 511 }; |
| 512 | |
| 4391 | 513 /* Here's the simple one, when a program just wants a value. */ |
| 514 | |
| 515 static std::string | |
| 516 kpse_var_value (const std::string& var) | |
| 517 { | |
| 518 std::string ret; | |
| 519 | |
| 520 std::string tmp = octave_env::getenv (var); | |
| 521 | |
| 522 if (! tmp.empty ()) | |
| 523 ret = kpse_var_expand (tmp); | |
| 524 | |
| 525 #ifdef KPSE_DEBUG | |
| 526 if (KPSE_DEBUG_P (KPSE_DEBUG_VARS)) | |
| 527 DEBUGF2 ("variable: %s = %s\n", var.c_str (), | |
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528 tmp.empty () ? "(nil)" : tmp.c_str ()); |
| 4391 | 529 #endif |
| 530 | |
| 531 return ret; | |
| 532 } | |
| 533 | |
| 534 /* Truncate any too-long components in NAME, returning the result. It's | |
| 535 too bad this is necessary. See comments in readable.c for why. */ | |
| 536 | |
| 4393 | 537 static std::string |
| 538 kpse_truncate_filename (const std::string& name) | |
| 4391 | 539 { |
| 540 unsigned c_len = 0; /* Length of current component. */ | |
| 541 unsigned ret_len = 0; /* Length of constructed result. */ | |
| 542 | |
| 4393 | 543 std::string ret = name; |
| 544 | |
| 545 size_t len = name.length (); | |
| 546 | |
| 547 for (size_t i = 0; i < len; i++) | |
| 4391 | 548 { |
| 4393 | 549 if (IS_DIR_SEP (name[i]) || IS_DEVICE_SEP (name[i])) |
| 4391 | 550 { |
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551 /* At a directory delimiter, reset component length. */ |
| 4391 | 552 c_len = 0; |
| 553 } | |
| 554 else if (c_len > NAME_MAX) | |
| 555 { | |
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556 /* If past the max for a component, ignore this character. */ |
| 4391 | 557 continue; |
| 558 } | |
| 559 | |
| 560 /* Copy this character. */ | |
| 4393 | 561 ret[ret_len++] = name[i]; |
| 4391 | 562 c_len++; |
| 563 } | |
| 564 | |
| 4393 | 565 ret.resize (ret_len); |
| 4391 | 566 |
| 567 return ret; | |
| 568 } | |
| 569 | |
| 570 /* If access can read FN, run stat (assigning to stat buffer ST) and | |
| 571 check that fn is not a directory. Don't check for just being a | |
| 572 regular file, as it is potentially useful to read fifo's or some | |
| 573 kinds of devices. */ | |
| 574 | |
| 575 #ifdef WIN32 | |
| 576 static inline bool | |
| 4393 | 577 READABLE (const std::string& fn, struct stat&) |
| 4391 | 578 { |
| 4393 | 579 const char *t = fn.c_str (); |
| 580 return (GetFileAttributes (t) != 0xFFFFFFFF | |
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581 && ! (GetFileAttributes (t) & FILE_ATTRIBUTE_DIRECTORY)); |
| 4391 | 582 } |
| 583 #else | |
| 584 static inline bool | |
| 4393 | 585 READABLE (const std::string& fn, struct stat& st) |
| 4391 | 586 { |
| 4393 | 587 const char *t = fn.c_str (); |
| 588 return (access (t, R_OK) == 0 | |
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589 && stat (t, &(st)) == 0 && ! S_ISDIR (st.st_mode)); |
| 4391 | 590 } |
| 591 #endif | |
| 592 | |
| 593 /* POSIX invented the brain-damage of not necessarily truncating | |
| 594 filename components; the system's behavior is defined by the value of | |
| 595 the symbol _POSIX_NO_TRUNC, but you can't change it dynamically! | |
| 596 | |
| 597 Generic const return warning. See extend-fname.c. */ | |
| 598 | |
| 4393 | 599 static std::string |
| 600 kpse_readable_file (const std::string& name) | |
| 4391 | 601 { |
| 602 struct stat st; | |
| 4393 | 603 std::string ret; |
| 4391 | 604 |
| 605 if (READABLE (name, st)) | |
| 606 { | |
| 4393 | 607 ret = name; |
| 4391 | 608 |
| 609 #ifdef ENAMETOOLONG | |
| 610 } | |
| 611 else if (errno == ENAMETOOLONG) | |
| 612 { | |
| 613 ret = kpse_truncate_filename (name); | |
| 614 | |
| 615 /* Perhaps some other error will occur with the truncated name, | |
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616 so let's call access again. */ |
| 4391 | 617 |
| 618 if (! READABLE (ret, st)) | |
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619 { |
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620 /* Failed. */ |
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621 ret = std::string (); |
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622 } |
| 4391 | 623 #endif /* ENAMETOOLONG */ |
| 624 | |
| 625 } | |
| 626 else | |
| 627 { | |
| 628 /* Some other error. */ | |
| 629 if (errno == EACCES) | |
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630 { |
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631 /* Maybe warn them if permissions are bad. */ |
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632 perror (name.c_str ()); |
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633 } |
| 4393 | 634 |
| 635 ret = std::string (); | |
| 4391 | 636 } |
| 637 | |
| 638 return ret; | |
| 639 } | |
| 640 | |
| 641 /* Sorry this is such a system-dependent mess, but I can't see any way | |
| 642 to usefully generalize. */ | |
| 643 | |
| 644 static bool | |
| 645 kpse_absolute_p (const std::string& filename, int relative_ok) | |
| 646 { | |
| 647 size_t len = filename.length (); | |
| 648 | |
| 4409 | 649 int absolute = (len > 0 && IS_DIR_SEP (filename[0])) |
| 4391 | 650 #ifdef DOSISH |
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651 /* Novell allows non-alphanumeric drive letters. */ |
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652 || (len > 0 && IS_DEVICE_SEP (filename[1])) |
| 4391 | 653 #endif /* DOSISH */ |
| 654 #ifdef WIN32 | |
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655 /* UNC names */ |
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656 || (len > 1 && filename[0] == '\\' && filename[1] == '\\') |
| 4391 | 657 #endif |
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658 ; |
| 4409 | 659 |
| 4391 | 660 int explicit_relative |
| 661 = relative_ok | |
| 662 && (len > 1 | |
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663 && filename[0] == '.' |
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664 && (IS_DIR_SEP (filename[1]) |
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665 || (len > 2 && filename[1] == '.' && IS_DIR_SEP (filename[2])))); |
| 4391 | 666 |
| 667 return absolute || explicit_relative; | |
| 668 } | |
| 669 | |
| 4378 | 670 /* The very first search is for texmf.cnf, called when someone tries to |
| 671 initialize the TFM path or whatever. init_path calls kpse_cnf_get | |
| 672 which calls kpse_all_path_search to find all the texmf.cnf's. We | |
| 673 need to do various special things in this case, since we obviously | |
| 674 don't yet have the configuration files when we're searching for the | |
| 675 configuration files. */ | |
| 676 static bool first_search = true; | |
| 677 | |
| 678 /* This function is called after every search (except the first, since | |
| 679 we definitely want to allow enabling the logging in texmf.cnf) to | |
| 680 record the filename(s) found in $TEXMFLOG. */ | |
| 681 | |
| 682 static void | |
| 4391 | 683 log_search (const string_vector& filenames) |
| 4378 | 684 { |
| 4398 | 685 static FILE *log_file = 0; |
| 4378 | 686 static bool first_time = true; /* Need to open the log file? */ |
| 4391 | 687 |
| 688 if (first_time) | |
| 689 { | |
| 690 first_time = false; | |
| 691 | |
| 692 /* Get name from either envvar or config file. */ | |
| 693 std::string log_name = kpse_var_value ("TEXMFLOG"); | |
| 694 | |
| 695 if (! log_name.empty ()) | |
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696 { |
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697 log_file = xfopen (log_name.c_str (), "a"); |
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698 |
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699 if (! log_file) |
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700 perror (log_name.c_str ()); |
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701 } |
| 4378 | 702 } |
| 4391 | 703 |
| 704 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH) || log_file) | |
| 705 { | |
| 706 /* FILENAMES should never be null, but safety doesn't hurt. */ | |
| 707 for (int e = 0; e < filenames.length () && ! filenames[e].empty (); e++) | |
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708 { |
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709 std::string filename = filenames[e]; |
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710 |
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711 /* Only record absolute filenames, for privacy. */ |
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712 if (log_file && kpse_absolute_p (filename.c_str (), false)) |
| 10411 | 713 gnulib::fprintf (log_file, "%lu %s\n", |
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714 static_cast<unsigned long> (time (0)), |
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715 filename.c_str ()); |
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716 |
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717 /* And show them online, if debugging. We've already started |
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718 the debugging line in 'search', where this is called, so |
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719 just print the filename here, don't use DEBUGF. */ |
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720 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 10411 | 721 gnulib::fputs (filename.c_str (), stderr); |
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722 } |
| 4378 | 723 } |
| 724 } | |
| 4392 | 725 |
| 4378 | 726 /* Concatenate each element in DIRS with NAME (assume each ends with a |
| 727 /, to save time). If SEARCH_ALL is false, return the first readable | |
| 728 regular file. Else continue to search for more. In any case, if | |
| 729 none, return a list containing just NULL. | |
| 730 | |
| 731 We keep a single buffer for the potential filenames and reallocate | |
| 732 only when necessary. I'm not sure it's noticeably faster, but it | |
| 733 does seem cleaner. (We do waste a bit of space in the return | |
| 734 value, though, since we don't shrink it to the final size returned.) */ | |
| 735 | |
| 4390 | 736 static string_vector |
| 737 dir_list_search (str_llist_type *dirs, const std::string& name, | |
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738 bool search_all) |
| 4378 | 739 { |
| 740 str_llist_elt_type *elt; | |
| 4390 | 741 string_vector ret; |
| 4378 | 742 |
| 743 for (elt = *dirs; elt; elt = STR_LLIST_NEXT (*elt)) | |
| 744 { | |
| 4390 | 745 const std::string dir = STR_LLIST (*elt); |
| 4393 | 746 |
| 747 std::string potential = dir + name; | |
| 748 | |
| 749 std::string tmp = kpse_readable_file (potential); | |
| 750 | |
| 751 if (! tmp.empty ()) | |
| 4378 | 752 { |
| 4393 | 753 ret.append (potential); |
| 4391 | 754 |
| 4378 | 755 /* Move this element towards the top of the list. */ |
| 756 str_llist_float (dirs, elt); | |
| 4391 | 757 |
| 758 if (! search_all) | |
| 4378 | 759 return ret; |
| 760 } | |
| 761 } | |
| 4391 | 762 |
| 4378 | 763 return ret; |
| 764 } | |
| 4392 | 765 |
| 4378 | 766 /* This is called when NAME is absolute or explicitly relative; if it's |
| 767 readable, return (a list containing) it; otherwise, return NULL. */ | |
| 768 | |
| 4390 | 769 static string_vector |
| 4393 | 770 absolute_search (const std::string& name) |
| 4378 | 771 { |
| 4390 | 772 string_vector ret_list; |
| 4393 | 773 std::string found = kpse_readable_file (name); |
| 4391 | 774 |
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775 /* Add 'found' to the return list even if it's null; that tells |
| 4378 | 776 the caller we didn't find anything. */ |
| 4394 | 777 ret_list.append (found); |
| 4391 | 778 |
| 4378 | 779 return ret_list; |
| 780 } | |
| 4392 | 781 |
| 4378 | 782 /* This is the hard case -- look for NAME in PATH. If ALL is false, |
| 783 return the first file found. Otherwise, search all elements of PATH. */ | |
| 784 | |
| 4390 | 785 static string_vector |
| 4394 | 786 path_search (const std::string& path, const std::string& name, |
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787 bool /* must_exist */, bool all) |
| 4378 | 788 { |
| 4390 | 789 string_vector ret_list; |
| 4378 | 790 bool done = false; |
| 4390 | 791 |
| 8021 | 792 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4390 | 793 { |
| 4394 | 794 std::string elt = *pi; |
| 795 | |
| 4390 | 796 string_vector found; |
| 797 bool allow_disk_search = true; | |
| 798 | |
| 4394 | 799 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
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800 { |
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801 /* Those magic leading chars in a path element means don't |
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802 search the disk for this elt. And move past the magic to |
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803 get to the name. */ |
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804 allow_disk_search = false; |
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805 elt = elt.substr (2); |
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806 } |
| 4390 | 807 |
| 808 /* Do not touch the device if present */ | |
| 809 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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810 { |
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811 while (elt.length () > 3 |
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812 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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813 { |
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814 elt[2] = elt[1]; |
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815 elt[1] = elt[0]; |
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816 elt = elt.substr (1); |
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817 } |
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818 } |
| 4390 | 819 else |
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820 { |
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821 /* We never want to search the whole disk. */ |
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822 while (elt.length () > 1 |
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823 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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824 elt = elt.substr (1); |
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825 } |
| 4391 | 826 |
| 4390 | 827 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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828 (search), also tests first_search, and does the resetting. */ |
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829 found = first_search ? string_vector () : kpse_db_search (name, elt, all); |
| 4390 | 830 |
| 831 /* Search the filesystem if (1) the path spec allows it, and either | |
| 4378 | 832 (2a) we are searching for texmf.cnf ; or |
| 4391 | 833 (2b) no db exists; or |
| 4378 | 834 (2c) no db's are relevant to this elt; or |
| 835 (3) MUST_EXIST && NAME was not in the db. | |
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836 In (2*), 'found' will be NULL. |
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837 In (3), 'found' will be an empty list. */ |
| 4390 | 838 |
| 839 if (allow_disk_search && found.empty ()) | |
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840 { |
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841 str_llist_type *dirs = kpse_element_dirs (elt); |
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842 |
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843 if (dirs && *dirs) |
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844 found = dir_list_search (dirs, name, all); |
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845 } |
| 4390 | 846 |
| 847 /* Did we find anything anywhere? */ | |
| 848 if (! found.empty ()) | |
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849 { |
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850 if (all) |
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851 ret_list.append (found); |
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852 else |
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853 { |
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854 ret_list.append (found[0]); |
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855 done = true; |
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856 } |
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857 } |
| 4378 | 858 } |
| 859 | |
| 860 return ret_list; | |
| 4390 | 861 } |
| 4392 | 862 |
| 4378 | 863 /* Search PATH for ORIGINAL_NAME. If ALL is false, or ORIGINAL_NAME is |
| 864 absolute_p, check ORIGINAL_NAME itself. Otherwise, look at each | |
| 865 element of PATH for the first readable ORIGINAL_NAME. | |
| 4391 | 866 |
| 4378 | 867 Always return a list; if no files are found, the list will |
| 868 contain just NULL. If ALL is true, the list will be | |
| 869 terminated with NULL. */ | |
| 870 | |
| 4390 | 871 static string_vector |
| 872 search (const std::string& path, const std::string& original_name, | |
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873 bool must_exist, bool all) |
| 4378 | 874 { |
| 4390 | 875 string_vector ret_list; |
| 4378 | 876 bool absolute_p; |
| 877 | |
| 878 /* Make a leading ~ count as an absolute filename, and expand $FOO's. */ | |
| 4390 | 879 std::string name = kpse_expand (original_name); |
| 4391 | 880 |
| 4378 | 881 /* If the first name is absolute or explicitly relative, no need to |
| 882 consider PATH at all. */ | |
| 883 absolute_p = kpse_absolute_p (name, true); | |
| 4391 | 884 |
| 4378 | 885 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 4391 | 886 DEBUGF4 ("start search (file=%s, must_exist=%d, find_all=%d, path=%s).\n", |
| 4390 | 887 name.c_str (), must_exist, all, path.c_str ()); |
| 4378 | 888 |
| 889 /* Find the file(s). */ | |
| 890 ret_list = absolute_p ? absolute_search (name) | |
| 891 : path_search (path, name, must_exist, all); | |
| 4391 | 892 |
| 4378 | 893 /* The very first search is for texmf.cnf. We can't log that, since |
| 894 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 895 if (first_search) |
| 896 { | |
| 897 first_search = false; | |
| 898 } | |
| 899 else | |
| 900 { | |
| 901 /* Record the filenames we found, if desired. And wrap them in a | |
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902 debugging line if we're doing that. */ |
| 4391 | 903 |
| 904 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
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905 DEBUGF1 ("search (%s) =>", original_name.c_str ()); |
| 4391 | 906 |
| 907 log_search (ret_list); | |
| 908 | |
| 909 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 910 gnulib::putc ('\n', stderr); |
| 4391 | 911 } |
| 4378 | 912 |
| 4390 | 913 return ret_list; |
| 4378 | 914 } |
| 4392 | 915 |
| 4378 | 916 /* Search PATH for the first NAME. */ |
| 917 | |
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918 /* Call 'kpse_expand' on NAME. If the result is an absolute or |
| 4399 | 919 explicitly relative filename, check whether it is a readable |
| 920 (regular) file. | |
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921 |
| 4399 | 922 Otherwise, look in each of the directories specified in PATH (also do |
| 923 tilde and variable expansion on elements in PATH), using a prebuilt | |
| 924 db (see db.h) if it's relevant for a given path element. | |
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925 |
| 4399 | 926 If the prebuilt db doesn't exist, or if MUST_EXIST is true and NAME |
| 927 isn't found in the prebuilt db, look on the filesystem. (I.e., if | |
| 928 MUST_EXIST is false, and NAME isn't found in the db, do *not* look on | |
| 929 the filesystem.) | |
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930 |
| 4399 | 931 The caller must expand PATH. This is because it makes more sense to |
| 932 do this once, in advance, instead of for every search using it. | |
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933 |
| 4399 | 934 In any case, return the complete filename if found, otherwise NULL. */ |
| 935 | |
| 936 static std::string | |
| 4390 | 937 kpse_path_search (const std::string& path, const std::string& name, |
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938 bool must_exist) |
| 4378 | 939 { |
| 4390 | 940 string_vector ret_list = search (path, name, must_exist, false); |
| 941 | |
| 942 return ret_list.empty () ? std::string () : ret_list[0]; | |
| 4378 | 943 } |
| 944 | |
| 945 /* Search all elements of PATH for files named NAME. Not sure if it's | |
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946 right to assert 'must_exist' here, but it suffices now. */ |
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947 |
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948 /* Like 'kpse_path_search' with MUST_EXIST true, but return a list of |
| 4399 | 949 all the filenames (or NULL if none), instead of taking the first. */ |
| 950 | |
| 951 static string_vector | |
| 4390 | 952 kpse_all_path_search (const std::string& path, const std::string& name) |
| 4378 | 953 { |
| 4390 | 954 return search (path, name, true, true); |
| 4378 | 955 } |
| 4392 | 956 |
| 4378 | 957 /* This is the hard case -- look in each element of PATH for each |
| 958 element of NAMES. If ALL is false, return the first file found. | |
| 959 Otherwise, search all elements of PATH. */ | |
| 960 | |
| 4390 | 961 static string_vector |
| 4394 | 962 path_find_first_of (const std::string& path, const string_vector& names, |
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963 bool /* must_exist */, bool all) |
| 4378 | 964 { |
| 4390 | 965 string_vector ret_list; |
| 4378 | 966 bool done = false; |
| 4390 | 967 |
| 8021 | 968 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4378 | 969 { |
| 4394 | 970 std::string elt = *pi; |
| 971 | |
| 4378 | 972 str_llist_type *dirs; |
| 973 str_llist_elt_type *dirs_elt; | |
| 4390 | 974 string_vector found; |
| 4378 | 975 bool allow_disk_search = true; |
| 976 | |
| 4394 | 977 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
|
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978 { |
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979 /* Those magic leading chars in a path element means don't |
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980 search the disk for this elt. And move past the magic to |
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981 get to the name. */ |
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982 |
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983 allow_disk_search = false; |
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984 elt = elt.substr (2); |
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985 } |
| 4378 | 986 |
| 987 /* Do not touch the device if present */ | |
| 988 | |
| 989 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
|
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990 { |
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991 while (elt.length () > 3 |
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992 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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993 { |
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994 elt[2] = elt[1]; |
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995 elt[1] = elt[0]; |
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996 elt = elt.substr (1); |
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997 } |
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998 } |
| 4378 | 999 else |
|
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1000 { |
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1001 /* We never want to search the whole disk. */ |
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1002 while (elt.length () > 1 |
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1003 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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1004 elt = elt.substr (1); |
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1005 } |
| 4378 | 1006 |
| 1007 /* We have to search one directory at a time. */ | |
| 1008 dirs = kpse_element_dirs (elt); | |
| 1009 for (dirs_elt = *dirs; dirs_elt; dirs_elt = STR_LLIST_NEXT (*dirs_elt)) | |
|
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1010 { |
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1011 const std::string dir = STR_LLIST (*dirs_elt); |
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1012 |
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1013 int len = names.length (); |
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1014 for (int i = 0; i < len && !done; i++) |
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1015 { |
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1016 std::string name = names[i]; |
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1017 |
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1018 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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1019 (find_first_of), also tests first_search, and does the |
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1020 resetting. */ |
|
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1021 found = first_search ? string_vector () |
|
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1022 : kpse_db_search (name, dir.c_str (), all); |
|
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1023 |
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1024 /* Search the filesystem if (1) the path spec allows it, |
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1025 and either |
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1026 |
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1027 (2a) we are searching for texmf.cnf ; or |
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1028 (2b) no db exists; or |
|
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1029 (2c) no db's are relevant to this elt; or |
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1030 (3) MUST_EXIST && NAME was not in the db. |
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1031 |
|
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1032 In (2*), 'found' will be NULL. |
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1033 In (3), 'found' will be an empty list. */ |
|
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1034 |
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1035 if (allow_disk_search && found.empty ()) |
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1036 { |
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1037 static str_llist_type *tmp = 0; |
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1038 |
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1039 if (! tmp) |
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1040 { |
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1041 tmp = new str_llist_type; |
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1042 *tmp = 0; |
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1043 str_llist_add (tmp, ""); |
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1044 } |
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1045 |
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1046 STR_LLIST (*(*tmp)) = dir; |
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1047 |
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1048 found = dir_list_search (tmp, name, all); |
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1049 } |
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1050 |
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1051 /* Did we find anything anywhere? */ |
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1052 if (! found.empty ()) |
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1053 { |
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1054 if (all) |
|
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1055 ret_list.append (found); |
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1056 else |
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1057 { |
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1058 ret_list.append (found[0]); |
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1059 done = true; |
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1060 } |
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1061 } |
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1062 } |
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1063 } |
| 4378 | 1064 } |
| 1065 | |
| 1066 return ret_list; | |
| 4391 | 1067 } |
| 4378 | 1068 |
| 4390 | 1069 static string_vector |
| 1070 find_first_of (const std::string& path, const string_vector& names, | |
|
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1071 bool must_exist, bool all) |
| 4378 | 1072 { |
| 4390 | 1073 string_vector ret_list; |
| 4378 | 1074 |
| 1075 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 1076 { | |
| 10411 | 1077 gnulib::fputs ("start find_first_of ((", stderr); |
| 4391 | 1078 |
| 4390 | 1079 int len = names.length (); |
| 4391 | 1080 |
| 4390 | 1081 for (int i = 0; i < len; i++) |
|
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1082 { |
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1083 if (i == 0) |
| 10411 | 1084 gnulib::fputs (names[i].c_str (), stderr); |
|
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1085 else |
| 10411 | 1086 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
|
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1087 } |
| 4391 | 1088 |
| 10411 | 1089 gnulib::fprintf (stderr, "), path=%s, must_exist=%d).\n", |
| 1090 path.c_str (), must_exist); | |
| 4378 | 1091 } |
| 1092 | |
| 4409 | 1093 for (int i = 0; i < names.length (); i++) |
| 1094 { | |
| 1095 std::string name = names[i]; | |
| 1096 | |
| 1097 if (kpse_absolute_p (name, true)) | |
|
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1098 { |
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1099 /* If the name is absolute or explicitly relative, no need |
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1100 to consider PATH at all. If we find something, then we |
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1101 are done. */ |
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1102 |
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1103 ret_list = absolute_search (name); |
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1104 |
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1105 if (! ret_list.empty ()) |
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1106 return ret_list; |
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1107 } |
| 4409 | 1108 } |
| 1109 | |
| 4378 | 1110 /* Find the file. */ |
| 1111 ret_list = path_find_first_of (path, names, must_exist, all); | |
| 1112 | |
| 1113 /* The very first search is for texmf.cnf. We can't log that, since | |
| 1114 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 1115 if (first_search) |
| 1116 { | |
| 1117 first_search = false; | |
| 1118 } | |
| 1119 else | |
| 1120 { | |
| 1121 /* Record the filenames we found, if desired. And wrap them in a | |
|
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1122 debugging line if we're doing that. */ |
| 4391 | 1123 |
| 1124 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
|
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1125 { |
| 10411 | 1126 gnulib::fputs ("find_first_of (", stderr); |
|
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1127 |
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1128 int len = names.length (); |
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1129 |
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1130 for (int i = 0; i < len; i++) |
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1131 { |
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1132 if (i == 0) |
| 10411 | 1133 gnulib::fputs (names[i].c_str (), stderr); |
|
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1134 else |
| 10411 | 1135 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
|
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1136 } |
| 10411 | 1137 |
| 1138 gnulib::fputs (") =>", stderr); | |
|
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1139 } |
| 4391 | 1140 |
| 1141 log_search (ret_list); | |
| 1142 | |
| 1143 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 1144 gnulib::putc ('\n', stderr); |
| 4391 | 1145 } |
| 4378 | 1146 |
| 4390 | 1147 return ret_list; |
| 4378 | 1148 } |
| 1149 | |
| 1150 /* Search each element of PATH for each element of NAMES. Return the | |
| 1151 first one found. */ | |
| 1152 | |
| 4399 | 1153 /* Search each element of PATH for each element in the list of NAMES. |
| 1154 Return the first one found. */ | |
| 1155 | |
| 1156 static std::string | |
| 4390 | 1157 kpse_path_find_first_of (const std::string& path, const string_vector& names, |
|
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1158 bool must_exist) |
| 4378 | 1159 { |
| 4390 | 1160 string_vector ret_list = find_first_of (path, names, must_exist, false); |
| 1161 | |
| 1162 return ret_list.empty () ? std::string () : ret_list[0]; | |
| 4378 | 1163 } |
| 1164 | |
| 1165 /* Search each element of PATH for each element of NAMES and return a | |
| 1166 list containing everything found, in the order found. */ | |
| 1167 | |
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1168 /* Like 'kpse_path_find_first_of' with MUST_EXIST true, but return a |
| 4399 | 1169 list of all the filenames (or NULL if none), instead of taking the |
| 1170 first. */ | |
| 1171 | |
| 1172 static string_vector | |
| 4390 | 1173 kpse_all_path_find_first_of (const std::string& path, |
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1174 const string_vector& names) |
| 4378 | 1175 { |
| 4390 | 1176 return find_first_of (path, names, true, true); |
| 4378 | 1177 } |
| 1178 | |
| 4399 | 1179 /* General expansion. Some of this file (the brace-expansion |
| 4378 | 1180 code from bash) is covered by the GPL; this is the only GPL-covered |
| 1181 code in kpathsea. The part of the file that I wrote (the first | |
| 1182 couple of functions) is covered by the LGPL. */ | |
| 1183 | |
| 1184 /* If NAME has a leading ~ or ~user, Unix-style, expand it to the user's | |
| 1185 home directory, and return a new malloced string. If no ~, or no | |
| 1186 <pwd.h>, just return NAME. */ | |
| 1187 | |
| 4389 | 1188 static std::string |
| 1189 kpse_tilde_expand (const std::string& name) | |
| 4378 | 1190 { |
| 4389 | 1191 std::string expansion; |
| 4391 | 1192 |
| 4378 | 1193 /* If no leading tilde, do nothing. */ |
| 5137 | 1194 if (name.empty () || name[0] != '~') |
| 4391 | 1195 { |
| 1196 expansion = name; | |
| 1197 | |
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1198 /* If a bare tilde, return the home directory or '.'. (Very |
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1199 unlikely that the directory name will do anyone any good, but |
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1200 ... */ |
| 4391 | 1201 } |
| 1202 else if (name.length () == 1) | |
| 1203 { | |
| 1204 expansion = octave_env::getenv ("HOME"); | |
| 1205 | |
| 1206 if (expansion.empty ()) | |
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1207 expansion = "."; |
| 4391 | 1208 |
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1209 /* If '~/', remove any trailing / or replace leading // in $HOME. |
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1210 Should really check for doubled intermediate slashes, too. */ |
| 4378 | 1211 } |
| 4391 | 1212 else if (IS_DIR_SEP (name[1])) |
| 1213 { | |
| 1214 unsigned c = 1; | |
| 1215 std::string home = octave_env::getenv ("HOME"); | |
| 1216 | |
| 1217 if (home.empty ()) | |
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1218 home = "."; |
| 4391 | 1219 |
| 1220 size_t home_len = home.length (); | |
| 1221 | |
| 1222 /* handle leading // */ | |
| 1223 if (home_len > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
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1224 home = home.substr (1); |
| 4391 | 1225 |
| 1226 /* omit / after ~ */ | |
| 1227 if (IS_DIR_SEP (home[home_len - 1])) | |
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1228 c++; |
| 4391 | 1229 |
| 1230 expansion = home + name.substr (c); | |
| 1231 | |
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1232 /* If '~user' or '~user/', look up user in the passwd database (but |
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1233 OS/2 doesn't have this concept. */ |
| 4378 | 1234 } |
| 4391 | 1235 else |
| 4378 | 1236 #ifdef HAVE_PWD_H |
| 1237 { | |
| 1238 unsigned c = 2; | |
| 4391 | 1239 |
| 1240 /* find user name */ | |
| 1241 while (name.length () > c && ! IS_DIR_SEP (name[c])) | |
| 4378 | 1242 c++; |
| 4391 | 1243 |
| 1244 std::string user = name.substr (1, c-1); | |
| 1245 | |
| 4378 | 1246 /* We only need the cast here for (deficient) systems |
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1247 which do not declare 'getpwnam' in <pwd.h>. */ |
| 4391 | 1248 octave_passwd p = octave_passwd::getpwnam (user); |
| 4378 | 1249 |
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1250 /* If no such user, just use '.'. */ |
| 4391 | 1251 std::string home = p ? p.dir () : std::string ("."); |
| 1252 | |
| 1253 if (home.empty ()) | |
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1254 home = "."; |
| 4391 | 1255 |
| 1256 /* handle leading // */ | |
| 1257 if (home.length () > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
| 1258 home = home.substr (1); | |
| 1259 | |
| 1260 /* If HOME ends in /, omit the / after ~user. */ | |
| 1261 if (name.length () > c && IS_DIR_SEP (home[home.length () - 1])) | |
| 1262 c++; | |
| 1263 | |
| 1264 expansion = name.length () > c ? home : home + name.substr (c); | |
| 4378 | 1265 } |
| 1266 #else /* not HAVE_PWD_H */ | |
| 4391 | 1267 expansion = name; |
| 4378 | 1268 #endif /* not HAVE_PWD_H */ |
| 1269 | |
| 4389 | 1270 return expansion; |
| 4378 | 1271 } |
| 1272 | |
| 1273 /* Do variable expansion first so ~${USER} works. (Besides, it's what the | |
| 1274 shells do.) */ | |
| 1275 | |
| 4399 | 1276 /* Call kpse_var_expand and kpse_tilde_expand (in that order). Result |
| 1277 is always in fresh memory, even if no expansions were done. */ | |
| 1278 | |
| 1279 static std::string | |
| 4389 | 1280 kpse_expand (const std::string& s) |
| 4378 | 1281 { |
| 4389 | 1282 std::string var_expansion = kpse_var_expand (s); |
| 1283 return kpse_tilde_expand (var_expansion); | |
| 4378 | 1284 } |
| 1285 | |
| 1286 /* Forward declarations of functions from the original expand.c */ | |
| 4397 | 1287 static string_vector brace_expand (const std::string&); |
| 4378 | 1288 |
| 1289 /* If $KPSE_DOT is defined in the environment, prepend it to any relative | |
| 1290 path components. */ | |
| 1291 | |
| 4389 | 1292 static std::string |
| 1293 kpse_expand_kpse_dot (const std::string& path) | |
| 4378 | 1294 { |
| 4389 | 1295 std::string ret; |
| 4391 | 1296 std::string kpse_dot = octave_env::getenv ("KPSE_DOT"); |
| 1297 | |
| 1298 if (kpse_dot.empty ()) | |
| 4378 | 1299 return path; |
| 1300 | |
| 8021 | 1301 for (kpse_path_iterator pi (path); pi != std::string::npos; pi++) |
| 4391 | 1302 { |
| 4394 | 1303 std::string elt = *pi; |
| 1304 | |
| 4391 | 1305 /* We assume that the !! magic is only used on absolute components. |
|
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1306 Single "." get special treatment, as does "./" or its equivalent. */ |
| 4391 | 1307 |
| 4394 | 1308 size_t elt_len = elt.length (); |
| 1309 | |
| 1310 if (kpse_absolute_p (elt, false) | |
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1311 || (elt_len > 1 && elt[0] == '!' && elt[1] == '!')) |
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1312 ret += elt + ENV_SEP_STRING; |
| 4394 | 1313 else if (elt_len == 1 && elt[0] == '.') |
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1314 ret += kpse_dot + ENV_SEP_STRING; |
| 4394 | 1315 else if (elt_len > 1 && elt[0] == '.' && IS_DIR_SEP (elt[1])) |
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1316 ret += kpse_dot + elt.substr (1) + ENV_SEP_STRING; |
| 4391 | 1317 else |
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1318 ret += kpse_dot + DIR_SEP_STRING + elt + ENV_SEP_STRING; |
| 4378 | 1319 } |
| 1320 | |
| 4389 | 1321 int len = ret.length (); |
| 1322 if (len > 0) | |
| 4395 | 1323 ret.resize (len-1); |
| 4389 | 1324 |
| 4378 | 1325 return ret; |
| 1326 } | |
| 1327 | |
| 1328 /* Do brace expansion on ELT; then do variable and ~ expansion on each | |
| 1329 element of the result; then do brace expansion again, in case a | |
| 1330 variable definition contained braces (e.g., $TEXMF). Return a | |
| 1331 string comprising all of the results separated by ENV_SEP_STRING. */ | |
| 1332 | |
| 4389 | 1333 static std::string |
| 4394 | 1334 kpse_brace_expand_element (const std::string& elt) |
| 4378 | 1335 { |
| 4389 | 1336 std::string ret; |
| 4378 | 1337 |
| 4397 | 1338 string_vector expansions = brace_expand (elt); |
| 1339 | |
| 1340 for (int i = 0; i < expansions.length (); i++) | |
| 4391 | 1341 { |
| 1342 /* Do $ and ~ expansion on each element. */ | |
| 1343 std::string x = kpse_expand (expansions[i]); | |
| 1344 | |
| 1345 if (x != expansions[i]) | |
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1346 { |
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1347 /* If we did any expansions, do brace expansion again. Since |
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1348 recursive variable definitions are not allowed, this recursion |
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1349 must terminate. (In practice, it's unlikely there will ever be |
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1350 more than one level of recursion.) */ |
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1351 x = kpse_brace_expand_element (x); |
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1352 } |
| 4391 | 1353 |
| 1354 ret += x + ENV_SEP_STRING; | |
| 4378 | 1355 } |
| 1356 | |
| 4389 | 1357 ret.resize (ret.length () - 1); |
| 4391 | 1358 |
| 4378 | 1359 return ret; |
| 1360 } | |
| 1361 | |
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1362 /* Do brace expansion and call 'kpse_expand' on each element of the |
| 4399 | 1363 result; return the final expansion (always in fresh memory, even if |
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1364 no expansions were done). We don't call 'kpse_expand_default' |
| 4399 | 1365 because there is a whole sequence of defaults to run through; see |
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1366 'kpse_init_format'. */ |
| 4399 | 1367 |
| 1368 static std::string | |
| 4397 | 1369 kpse_brace_expand (const std::string& path) |
| 4378 | 1370 { |
| 1371 /* Must do variable expansion first because if we have | |
| 1372 foo = .:~ | |
| 1373 TEXINPUTS = $foo | |
| 1374 we want to end up with TEXINPUTS = .:/home/karl. | |
| 1375 Since kpse_path_element is not reentrant, we must get all | |
| 1376 the path elements before we start the loop. */ | |
| 4389 | 1377 std::string tmp = kpse_var_expand (path); |
| 4394 | 1378 |
| 4389 | 1379 std::string ret; |
| 4378 | 1380 |
| 8021 | 1381 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1382 { |
| 4394 | 1383 std::string elt = *pi; |
| 1384 | |
| 4391 | 1385 /* Do brace expansion first, so tilde expansion happens in {~ka,~kb}. */ |
| 1386 std::string expansion = kpse_brace_expand_element (elt); | |
| 1387 ret += expansion + ENV_SEP_STRING; | |
| 1388 } | |
| 4378 | 1389 |
| 4394 | 1390 size_t len = ret.length (); |
| 4389 | 1391 if (len > 0) |
| 4395 | 1392 ret.resize (len-1); |
| 4389 | 1393 |
| 1394 return kpse_expand_kpse_dot (ret); | |
| 4378 | 1395 } |
| 4392 | 1396 |
| 4378 | 1397 /* Expand all special constructs in a path, and include only the actually |
| 1398 existing directories in the result. */ | |
| 4399 | 1399 |
|
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1400 /* Do brace expansion and call 'kpse_expand' on each argument of the |
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1401 result, then expand any '//' constructs. The final expansion (always |
| 4399 | 1402 in fresh memory) is a path of all the existing directories that match |
| 1403 the pattern. */ | |
| 1404 | |
| 1405 static std::string | |
| 4397 | 1406 kpse_path_expand (const std::string& path) |
| 4378 | 1407 { |
| 4392 | 1408 std::string ret; |
| 4378 | 1409 unsigned len; |
| 1410 | |
| 1411 len = 0; | |
| 4391 | 1412 |
| 4378 | 1413 /* Expand variables and braces first. */ |
| 4389 | 1414 std::string tmp = kpse_brace_expand (path); |
| 4392 | 1415 |
| 4378 | 1416 /* Now expand each of the path elements, printing the results */ |
| 8021 | 1417 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1418 { |
| 4394 | 1419 std::string elt = *pi; |
| 1420 | |
| 4391 | 1421 str_llist_type *dirs; |
| 1422 | |
| 1423 /* Skip and ignore magic leading chars. */ | |
| 4394 | 1424 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
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1425 elt = elt.substr (2); |
| 4391 | 1426 |
| 1427 /* Do not touch the device if present */ | |
| 1428 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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1429 { |
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1430 while (elt.length () > 3 |
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1431 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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1432 { |
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1433 elt[2] = elt[1]; |
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1434 elt[1] = elt[0]; |
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1435 elt = elt.substr (1); |
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1436 } |
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1437 } |
| 4391 | 1438 else |
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1439 { |
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1440 /* We never want to search the whole disk. */ |
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1441 while (elt.length () > 1 |
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1442 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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1443 elt = elt.substr (1); |
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1444 } |
| 4378 | 1445 |
| 4394 | 1446 /* Search the disk for all dirs in the component specified. |
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1447 Be faster to check the database, but this is more reliable. */ |
| 4394 | 1448 dirs = kpse_element_dirs (elt); |
| 1449 | |
| 1450 if (dirs && *dirs) | |
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1451 { |
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1452 str_llist_elt_type *dir; |
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1453 |
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1454 for (dir = *dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1455 { |
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1456 const std::string thedir = STR_LLIST (*dir); |
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1457 unsigned dirlen = thedir.length (); |
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1458 |
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1459 ret += thedir; |
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1460 len += dirlen; |
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1461 |
|
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1462 /* Retain trailing slash if that's the root directory. */ |
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1463 if (dirlen == 1 |
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1464 || (dirlen == 3 && NAME_BEGINS_WITH_DEVICE (thedir) |
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1465 && IS_DIR_SEP (thedir[2]))) |
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1466 { |
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1467 ret += ENV_SEP_STRING; |
|
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1468 len++; |
|
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1469 } |
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|
1470 |
|
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1471 ret[len-1] = ENV_SEP; |
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1472 } |
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1473 } |
| 4378 | 1474 } |
| 4391 | 1475 |
| 4395 | 1476 if (len > 0) |
| 1477 ret.resize (len-1); | |
| 4391 | 1478 |
| 4378 | 1479 return ret; |
| 1480 } | |
| 4392 | 1481 |
| 4378 | 1482 /* braces.c -- code for doing word expansion in curly braces. Taken from |
| 16768 | 1483 bash 1.14.5. [And subsequently modified for kpatshea.] |
| 1484 | |
| 1485 Copyright (C) 1987,1991 Free Software Foundation, Inc. */ | |
| 4378 | 1486 |
| 4391 | 1487 #define brace_whitespace(c) (! (c) || (c) == ' ' || (c) == '\t' || (c) == '\n') |
| 4378 | 1488 |
| 1489 /* Basic idea: | |
| 1490 | |
| 1491 Segregate the text into 3 sections: preamble (stuff before an open brace), | |
| 1492 postamble (stuff after the matching close brace) and amble (stuff after | |
| 1493 preamble, and before postamble). Expand amble, and then tack on the | |
| 1494 expansions to preamble. Expand postamble, and tack on the expansions to | |
| 4391 | 1495 the result so far. */ |
| 4378 | 1496 |
| 4397 | 1497 /* Return a new array of strings which is the result of appending each |
| 1498 string in ARR2 to each string in ARR1. The resultant array is | |
| 1499 len (arr1) * len (arr2) long. For convenience, ARR1 (and its contents) | |
| 1500 are free ()'ed. ARR1 can be NULL, in that case, a new version of ARR2 | |
| 1501 is returned. */ | |
| 1502 | |
| 1503 static string_vector | |
| 1504 array_concat (const string_vector& arr1, const string_vector& arr2) | |
| 4378 | 1505 { |
| 4397 | 1506 string_vector result; |
| 1507 | |
| 1508 if (arr1.empty ()) | |
| 1509 result = arr2; | |
| 1510 else if (arr2.empty ()) | |
| 1511 result = arr1; | |
| 1512 else | |
| 1513 { | |
| 1514 int len1 = arr1.length (); | |
| 1515 int len2 = arr2.length (); | |
| 1516 | |
| 1517 result = string_vector (len1 * len2); | |
| 1518 | |
| 1519 int k = 0; | |
| 1520 for (int i = 0; i < len2; i++) | |
|
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1521 for (int j = 0; j < len1; j++) |
|
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1522 result[k++] = arr1[j] + arr2[i]; |
| 4397 | 1523 } |
| 1524 | |
| 1525 return result; | |
| 4378 | 1526 } |
| 1527 | |
| 4397 | 1528 static int brace_gobbler (const std::string&, int&, int); |
| 1529 static string_vector expand_amble (const std::string&); | |
| 4378 | 1530 |
| 1531 /* Return an array of strings; the brace expansion of TEXT. */ | |
| 4397 | 1532 static string_vector |
| 1533 brace_expand (const std::string& text) | |
| 4378 | 1534 { |
| 1535 /* Find the text of the preamble. */ | |
| 4397 | 1536 int i = 0; |
| 1537 int c = brace_gobbler (text, i, '{'); | |
| 1538 | |
| 1539 std::string preamble = text.substr (0, i); | |
| 1540 | |
| 1541 string_vector result = string_vector (preamble); | |
| 1542 | |
| 1543 if (c == '{') | |
| 4378 | 1544 { |
| 4397 | 1545 /* Find the amble. This is the stuff inside this set of braces. */ |
| 1546 int start = ++i; | |
| 1547 c = brace_gobbler (text, i, '}'); | |
| 1548 | |
| 1549 /* What if there isn't a matching close brace? */ | |
| 1550 if (! c) | |
|
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1551 { |
|
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1552 (*current_liboctave_warning_with_id_handler) |
|
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1553 ("Octave:pathsearch-syntax", |
|
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1554 "%s: Unmatched {", text.c_str ()); |
|
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1555 |
|
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1556 result = string_vector (text); |
|
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1557 } |
| 4397 | 1558 else |
|
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1559 { |
|
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1560 std::string amble = text.substr (start, i-start); |
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1561 result = array_concat (result, expand_amble (amble)); |
|
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1562 |
|
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1563 std::string postamble = text.substr (i+1); |
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1564 result = array_concat (result, brace_expand (postamble)); |
|
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|
1565 } |
| 4378 | 1566 } |
| 1567 | |
| 4397 | 1568 return result; |
| 4378 | 1569 } |
| 1570 | |
| 4397 | 1571 /* The character which is used to separate arguments. */ |
| 1572 static int brace_arg_separator = ','; | |
| 1573 | |
| 4378 | 1574 /* Expand the text found inside of braces. We simply try to split the |
| 1575 text at BRACE_ARG_SEPARATORs into separate strings. We then brace | |
| 1576 expand each slot which needs it, until there are no more slots which | |
| 1577 need it. */ | |
| 4397 | 1578 static string_vector |
| 1579 expand_amble (const std::string& text) | |
| 4378 | 1580 { |
| 4397 | 1581 string_vector result; |
| 1582 | |
| 1583 size_t text_len = text.length (); | |
| 1584 size_t start; | |
| 1585 int i, c; | |
| 1586 | |
| 1587 for (start = 0, i = 0, c = 1; c && start < text_len; start = ++i) | |
| 4378 | 1588 { |
| 4397 | 1589 int i0 = i; |
| 1590 int c0 = brace_gobbler (text, i0, brace_arg_separator); | |
| 1591 int i1 = i; | |
| 1592 int c1 = brace_gobbler (text, i1, ENV_SEP); | |
| 4378 | 1593 c = c0 | c1; |
| 1594 i = (i0 < i1 ? i0 : i1); | |
| 1595 | |
| 4397 | 1596 std::string tem = text.substr (start, i-start); |
| 1597 | |
| 1598 string_vector partial = brace_expand (tem); | |
| 1599 | |
| 1600 if (result.empty ()) | |
|
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1601 result = partial; |
| 4378 | 1602 else |
|
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1603 result.append (partial); |
| 4378 | 1604 } |
| 4397 | 1605 |
| 1606 return result; | |
| 4378 | 1607 } |
| 1608 | |
| 1609 /* Start at INDEX, and skip characters in TEXT. Set INDEX to the | |
| 1610 index of the character matching SATISFY. This understands about | |
| 1611 quoting. Return the character that caused us to stop searching; | |
| 1612 this is either the same as SATISFY, or 0. */ | |
| 1613 static int | |
| 4397 | 1614 brace_gobbler (const std::string& text, int& indx, int satisfy) |
| 4378 | 1615 { |
|
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1616 int c = 0; |
|
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1617 int level = 0; |
|
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1618 int quoted = 0; |
|
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1619 int pass_next = 0; |
| 4397 | 1620 |
| 1621 size_t text_len = text.length (); | |
| 1622 | |
| 1623 size_t i = indx; | |
| 1624 | |
| 1625 for (; i < text_len; i++) | |
| 4378 | 1626 { |
| 4397 | 1627 c = text[i]; |
| 1628 | |
| 4378 | 1629 if (pass_next) |
|
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1630 { |
|
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1631 pass_next = 0; |
|
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1632 continue; |
|
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1633 } |
| 4378 | 1634 |
| 1635 /* A backslash escapes the next character. This allows backslash to | |
|
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1636 escape the quote character in a double-quoted string. */ |
| 4378 | 1637 if (c == '\\' && (quoted == 0 || quoted == '"' || quoted == '`')) |
| 1638 { | |
| 1639 pass_next = 1; | |
| 1640 continue; | |
| 1641 } | |
| 1642 | |
| 1643 if (quoted) | |
|
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1644 { |
|
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1645 if (c == quoted) |
|
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1646 quoted = 0; |
|
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1647 continue; |
|
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1648 } |
| 4378 | 1649 |
| 1650 if (c == '"' || c == '\'' || c == '`') | |
|
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1651 { |
|
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1652 quoted = c; |
|
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1653 continue; |
|
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1654 } |
| 4391 | 1655 |
| 4378 | 1656 if (c == satisfy && !level && !quoted) |
|
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1657 { |
|
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1658 /* We ignore an open brace surrounded by whitespace, and also |
|
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1659 an open brace followed immediately by a close brace, that |
|
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1660 was preceded with whitespace. */ |
|
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1661 if (c == '{' |
|
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1662 && ((i == 0 || brace_whitespace (text[i-1])) |
|
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1663 && (i+1 < text_len |
|
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1664 && (brace_whitespace (text[i+1]) || text[i+1] == '}')))) |
|
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1665 continue; |
|
15466
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1666 /* If this is being compiled as part of bash, ignore the '{' |
|
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1667 in a '${ }' construct */ |
|
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1668 if ((c != '{') || i == 0 || (text[i-1] != '$')) |
|
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|
1669 break; |
|
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1670 } |
| 4378 | 1671 |
| 1672 if (c == '{') | |
|
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1673 level++; |
| 4378 | 1674 else if (c == '}' && level) |
|
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1675 level--; |
| 4378 | 1676 } |
| 1677 | |
| 4397 | 1678 indx = i; |
| 1679 return c; | |
| 4378 | 1680 } |
| 1681 | |
| 1682 /* For each file format, we record the following information. The main | |
| 1683 thing that is not part of this structure is the environment variable | |
| 1684 lists. They are used directly in tex-file.c. We could incorporate | |
| 1685 them here, but it would complicate the code a bit. We could also do | |
| 1686 it via variable expansion, but not now, maybe not ever: | |
| 1687 ${PKFONTS-${TEXFONTS-/usr/local/lib/texmf/fonts//}}. */ | |
| 1688 | |
| 4399 | 1689 struct kpse_format_info_type |
| 4378 | 1690 { |
|
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1691 kpse_format_info_type (void) |
|
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1692 : type (), path (), raw_path (), path_source (), override_path (), |
|
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1693 client_path (), cnf_path (), default_path (), suffix () |
|
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1694 { } |
|
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1695 |
|
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1696 ~kpse_format_info_type (void) { } |
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1697 |
|
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1698 std::string type; /* Human-readable description. */ |
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1699 std::string path; /* The search path to use. */ |
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1700 std::string raw_path; /* Pre-$~ (but post-default) expansion. */ |
| 4390 | 1701 std::string path_source; /* Where the path started from. */ |
| 1702 std::string override_path; /* From client environment variable. */ | |
| 1703 std::string client_path; /* E.g., from dvips's config.ps. */ | |
|
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1704 std::string cnf_path; /* From texmf.cnf. */ |
| 4390 | 1705 std::string default_path; /* If all else fails. */ |
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1706 string_vector suffix; /* For kpse_find_file to check for/append. */ |
| 4399 | 1707 }; |
| 4378 | 1708 |
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1709 /* The sole variable of that type, indexed by 'kpse_file_format_type'. |
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1710 Initialized by calls to 'kpse_find_file' for 'kpse_init_format'. */ |
| 4378 | 1711 static kpse_format_info_type kpse_format_info; |
| 1712 | |
| 1713 /* And EXPAND_DEFAULT calls kpse_expand_default on try_path and the | |
| 1714 present info->path. */ | |
| 4396 | 1715 #define EXPAND_DEFAULT(try_path, source_string) \ |
| 1716 do \ | |
| 1717 { \ | |
| 1718 if (! try_path.empty ()) \ | |
| 1719 { \ | |
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1720 info.raw_path = try_path; \ |
| 4396 | 1721 info.path = kpse_expand_default (try_path, info.path); \ |
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1722 info.path_source = source_string; \ |
| 4396 | 1723 } \ |
| 1724 } \ | |
| 1725 while (0) | |
| 4378 | 1726 |
| 1727 static hash_table_type db; /* The hash table for all the ls-R's. */ | |
| 4928 | 1728 |
| 4378 | 1729 static hash_table_type alias_db; |
| 1730 | |
| 4390 | 1731 static string_vector db_dir_list; |
| 4392 | 1732 |
| 4378 | 1733 /* Return true if FILENAME could be in PATH_ELT, i.e., if the directory |
| 1734 part of FILENAME matches PATH_ELT. Have to consider // wildcards, but | |
| 1735 $ and ~ expansion have already been done. */ | |
| 4391 | 1736 |
| 4378 | 1737 static bool |
| 4390 | 1738 match (const std::string& filename_arg, const std::string& path_elt_arg) |
| 4378 | 1739 { |
| 4390 | 1740 const char *filename = filename_arg.c_str (); |
| 1741 const char *path_elt = path_elt_arg.c_str (); | |
| 1742 | |
| 4378 | 1743 const char *original_filename = filename; |
| 1744 bool matched = false; | |
| 4391 | 1745 |
| 1746 for (; *filename && *path_elt; filename++, path_elt++) | |
| 1747 { | |
| 4394 | 1748 if (*filename == *path_elt) /* normal character match */ |
|
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1749 ; |
| 4391 | 1750 |
| 1751 else if (IS_DIR_SEP (*path_elt) /* at // */ | |
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1752 && original_filename < filename && IS_DIR_SEP (path_elt[-1])) |
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1753 { |
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1754 while (IS_DIR_SEP (*path_elt)) |
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1755 path_elt++; /* get past second and any subsequent /'s */ |
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1756 |
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1757 if (*path_elt == 0) |
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1758 { |
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1759 /* Trailing //, matches anything. We could make this |
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1760 part of the other case, but it seems pointless to do |
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1761 the extra work. */ |
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1762 matched = true; |
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1763 break; |
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1764 } |
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1765 else |
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1766 { |
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1767 /* Intermediate //, have to match rest of PATH_ELT. */ |
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1768 for (; !matched && *filename; filename++) |
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1769 { |
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1770 /* Try matching at each possible character. */ |
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1771 if (IS_DIR_SEP (filename[-1]) && *filename == *path_elt) |
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1772 matched = match (filename, path_elt); |
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1773 } |
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1774 |
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1775 /* Prevent filename++ when *filename='\0'. */ |
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1776 break; |
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1777 } |
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1778 } |
| 4391 | 1779 else |
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1780 /* normal character nonmatch, quit */ |
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1781 break; |
| 4378 | 1782 } |
| 1783 | |
| 1784 /* If we've reached the end of PATH_ELT, check that we're at the last | |
| 1785 component of FILENAME, we've matched. */ | |
| 4391 | 1786 if (! matched && *path_elt == 0) |
| 1787 { | |
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1788 /* Probably PATH_ELT ended with 'vf' or some such, and FILENAME |
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1789 ends with 'vf/ptmr.vf'. In that case, we'll be at a |
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1790 directory separator. On the other hand, if PATH_ELT ended |
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1791 with a / (as in 'vf/'), FILENAME being the same 'vf/ptmr.vf', |
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1792 we'll be at the 'p'. Upshot: if we're at a dir separator in |
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1793 FILENAME, skip it. But if not, that's ok, as long as there |
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1794 are no more dir separators. */ |
| 4391 | 1795 |
| 1796 if (IS_DIR_SEP (*filename)) | |
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1797 filename++; |
| 4391 | 1798 |
| 1799 while (*filename && !IS_DIR_SEP (*filename)) | |
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1800 filename++; |
| 4391 | 1801 |
| 1802 matched = *filename == 0; | |
| 1803 } | |
| 1804 | |
| 4378 | 1805 return matched; |
| 1806 } | |
| 1807 | |
| 1808 /* If DB_DIR is a prefix of PATH_ELT, return true; otherwise false. | |
| 1809 That is, the question is whether to try the db for a file looked up | |
| 1810 in PATH_ELT. If PATH_ELT == ".", for example, the answer is no. If | |
| 1811 PATH_ELT == "/usr/local/lib/texmf/fonts//tfm", the answer is yes. | |
| 4391 | 1812 |
| 4378 | 1813 In practice, ls-R is only needed for lengthy subdirectory |
| 1814 comparisons, but there's no gain to checking PATH_ELT to see if it is | |
| 1815 a subdir match, since the only way to do that is to do a string | |
| 1816 search in it, which is all we do anyway. */ | |
| 4391 | 1817 |
| 4378 | 1818 static bool |
| 4390 | 1819 elt_in_db (const std::string& db_dir, const std::string& path_elt) |
| 4378 | 1820 { |
| 1821 bool found = false; | |
| 1822 | |
| 4390 | 1823 size_t db_dir_len = db_dir.length (); |
| 1824 size_t path_elt_len = path_elt.length (); | |
| 1825 | |
| 1826 size_t i = 0; | |
| 1827 | |
| 4394 | 1828 while (! found && db_dir[i] == path_elt[i]) |
| 4391 | 1829 { |
| 1830 i++; | |
| 1831 /* If we've matched the entire db directory, it's good. */ | |
| 1832 if (i == db_dir_len) | |
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1833 found = true; |
| 4391 | 1834 |
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1835 /* If we've reached the end of PATH_ELT, but not the end of the db |
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1836 directory, it's no good. */ |
| 4391 | 1837 else if (i == path_elt_len) |
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1838 break; |
| 4391 | 1839 } |
| 4378 | 1840 |
| 1841 return found; | |
| 1842 } | |
| 4392 | 1843 |
| 4378 | 1844 /* Avoid doing anything if this PATH_ELT is irrelevant to the databases. */ |
| 1845 | |
| 4399 | 1846 /* Return list of matches for NAME in the ls-R file matching PATH_ELT. If |
| 1847 ALL is set, return (null-terminated list) of all matches, else just | |
| 1848 the first. If no matches, return a pointer to an empty list. If no | |
| 1849 databases can be read, or PATH_ELT is not in any of the databases, | |
| 1850 return NULL. */ | |
| 1851 | |
| 1852 static string_vector | |
| 4390 | 1853 kpse_db_search (const std::string& name_arg, |
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1854 const std::string& orig_path_elt, bool all) |
| 4378 | 1855 { |
| 1856 bool done; | |
| 4390 | 1857 string_vector ret; |
| 1858 string_vector aliases; | |
| 4378 | 1859 bool relevant = false; |
| 4390 | 1860 |
| 4394 | 1861 std::string name = name_arg; |
| 4391 | 1862 |
| 4378 | 1863 /* If we failed to build the database (or if this is the recursive |
| 1864 call to build the db path), quit. */ | |
| 4398 | 1865 if (! db.buckets) |
| 4390 | 1866 return ret; |
| 4391 | 1867 |
| 4378 | 1868 /* When tex-glyph.c calls us looking for, e.g., dpi600/cmr10.pk, we |
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1869 won't find it unless we change NAME to just 'cmr10.pk' and append |
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1870 '/dpi600' to PATH_ELT. We are justified in using a literal '/' |
| 4378 | 1871 here, since that's what tex-glyph.c unconditionally uses in |
| 1872 DPI_BITMAP_SPEC. But don't do anything if the / begins NAME; that | |
| 1873 should never happen. */ | |
| 4394 | 1874 std::string path_elt; |
| 1875 size_t last_slash = name.rfind ('/'); | |
| 8021 | 1876 if (last_slash != std::string::npos && last_slash != 0) |
| 4390 | 1877 { |
| 4394 | 1878 std::string dir_part = name.substr (0, last_slash); |
| 1879 name = name.substr (last_slash + 1); | |
| 4390 | 1880 } |
| 1881 else | |
| 4394 | 1882 path_elt = orig_path_elt; |
| 4378 | 1883 |
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1884 /* Don't bother doing any lookups if this 'path_elt' isn't covered by |
| 4378 | 1885 any of database directories. We do this not so much because the |
| 1886 extra couple of hash lookups matter -- they don't -- but rather | |
| 1887 because we want to return NULL in this case, so path_search can | |
| 1888 know to do a disk search. */ | |
| 4394 | 1889 for (int e = 0; ! relevant && e < db_dir_list.length (); e++) |
| 4390 | 1890 relevant = elt_in_db (db_dir_list[e], path_elt); |
| 1891 | |
| 4391 | 1892 if (! relevant) |
| 4390 | 1893 return ret; |
| 4378 | 1894 |
| 1895 /* If we have aliases for this name, use them. */ | |
| 1896 if (alias_db.buckets) | |
| 1897 aliases = hash_lookup (alias_db, name); | |
| 1898 | |
| 4390 | 1899 /* Push aliases up by one and insert the original name at the front. */ |
| 1900 int len = aliases.length (); | |
| 1901 aliases.resize (len+1); | |
| 1902 for (int i = len; i > 0; i--) | |
| 1903 aliases[i] = aliases[i - 1]; | |
| 1904 aliases[0] = name; | |
| 4378 | 1905 |
| 1906 done = false; | |
| 4390 | 1907 len = aliases.length (); |
| 1908 for (int i = 0; i < len && !done; i++) | |
| 1909 { | |
| 1910 std::string atry = aliases[i]; | |
| 1911 | |
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1912 /* We have an ls-R db. Look up 'atry'. */ |
| 4390 | 1913 string_vector db_dirs = hash_lookup (db, atry); |
| 1914 | |
| 1915 /* For each filename found, see if it matches the path element. For | |
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1916 example, if we have .../cx/cmr10.300pk and .../ricoh/cmr10.300pk, |
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1917 and the path looks like .../cx, we don't want the ricoh file. */ |
| 4390 | 1918 |
| 1919 int db_dirs_len = db_dirs.length (); | |
| 1920 for (int j = 0; j < db_dirs_len && !done; j++) | |
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1921 { |
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1922 std::string db_file = db_dirs[j] + atry; |
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1923 bool matched = match (db_file, path_elt); |
| 4378 | 1924 |
| 1925 #ifdef KPSE_DEBUG | |
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1926 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
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1927 DEBUGF3 ("db:match (%s,%s) = %d\n", |
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1928 db_file.c_str (), path_elt.c_str (), matched); |
| 4378 | 1929 #endif |
| 1930 | |
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1931 /* We got a hit in the database. Now see if the file actually |
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1932 exists, possibly under an alias. */ |
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1933 if (matched) |
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1934 { |
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1935 std::string found; |
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1936 std::string tmp = kpse_readable_file (db_file); |
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1937 if (! tmp.empty ()) |
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1938 found = db_file; |
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1939 else |
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1940 { |
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1941 /* The hit in the DB doesn't exist in disk. Now try |
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1942 all its aliases. For example, suppose we have a |
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1943 hierarchy on CD, thus 'mf.bas', but ls-R contains |
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1944 'mf.base'. Find it anyway. Could probably work |
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1945 around this with aliases, but this is pretty easy |
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1946 and shouldn't hurt. The upshot is that if one of |
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1947 the aliases actually exists, we use that. */ |
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1948 |
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1949 int aliases_len = aliases.length (); |
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1950 |
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1951 for (int k = 1; k < aliases_len && found.empty (); k++) |
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1952 { |
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1953 std::string aatry = db_dirs[j] + aliases[k]; |
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1954 tmp = kpse_readable_file (aatry); |
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1955 if (! tmp.empty ()) |
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1956 found = aatry; |
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1957 } |
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1958 } |
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1959 |
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1960 /* If we have a real file, add it to the list, maybe done. */ |
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1961 if (! found.empty ()) |
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1962 { |
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1963 ret.append (found); |
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1964 |
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1965 if (! (all || found.empty ())) |
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1966 done = true; |
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1967 } |
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1968 } |
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1969 } |
| 4378 | 1970 } |
| 4391 | 1971 |
| 4378 | 1972 return ret; |
| 1973 } | |
| 1974 | |
| 4399 | 1975 /* Expand extra colons. */ |
| 4378 | 1976 |
| 1977 /* Check for leading colon first, then trailing, then doubled, since | |
| 1978 that is fastest. Usually it will be leading or trailing. */ | |
| 1979 | |
| 4399 | 1980 /* Replace a leading or trailing or doubled : in PATH with DFLT. If |
| 1981 no extra colons, return PATH. Only one extra colon is replaced. | |
| 1982 DFLT may not be NULL. */ | |
| 1983 | |
| 1984 static std::string | |
| 4394 | 1985 kpse_expand_default (const std::string& path, const std::string& fallback) |
| 4378 | 1986 { |
| 4394 | 1987 std::string expansion; |
| 1988 | |
| 1989 size_t path_len = path.length (); | |
| 1990 | |
| 1991 if (path_len == 0) | |
| 1992 expansion = fallback; | |
| 4378 | 1993 |
| 1994 /* Solitary or leading :? */ | |
| 4394 | 1995 else if (IS_ENV_SEP (path[0])) |
| 4378 | 1996 { |
| 4394 | 1997 expansion = path_len == 1 ? fallback : fallback + path; |
| 4378 | 1998 } |
| 1999 | |
| 2000 /* Sorry about the assignment in the middle of the expression, but | |
| 2001 conventions were made to be flouted and all that. I don't see the | |
| 2002 point of calling strlen twice or complicating the logic just to | |
| 2003 avoid the assignment (especially now that I've pointed it out at | |
| 2004 such great length). */ | |
| 4394 | 2005 else if (IS_ENV_SEP (path[path_len-1])) |
| 2006 expansion = path + fallback; | |
| 4378 | 2007 |
| 2008 /* OK, not leading or trailing. Check for doubled. */ | |
| 2009 else | |
| 2010 { | |
| 2011 /* What we'll return if we find none. */ | |
| 4394 | 2012 expansion = path; |
| 2013 | |
| 2014 for (size_t i = 0; i < path_len; i++) | |
| 4378 | 2015 { |
| 4394 | 2016 if (i + 1 < path_len |
|
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2017 && IS_ENV_SEP (path[i]) && IS_ENV_SEP (path[i+1])) |
| 4394 | 2018 { |
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2019 /* We have a doubled colon. */ |
| 4391 | 2020 |
| 4378 | 2021 /* Copy stuff up to and including the first colon. */ |
| 2022 /* Copy in FALLBACK, and then the rest of PATH. */ | |
|
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2023 expansion = path.substr (0, i+1) + fallback + path.substr (i+1); |
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2024 |
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2025 break; |
| 4378 | 2026 } |
| 2027 } | |
| 2028 } | |
| 4391 | 2029 |
| 4378 | 2030 return expansion; |
| 2031 } | |
| 2032 | |
| 4399 | 2033 /* Translate a path element to its corresponding director{y,ies}. */ |
| 4378 | 2034 |
| 2035 /* To avoid giving prototypes for all the routines and then their real | |
| 2036 definitions, we give all the subroutines first. The entry point is | |
| 2037 the last routine in the file. */ | |
| 4392 | 2038 |
| 4378 | 2039 /* Make a copy of DIR (unless it's null) and save it in L. Ensure that |
| 2040 DIR ends with a DIR_SEP for the benefit of later searches. */ | |
| 2041 | |
| 2042 static void | |
| 4390 | 2043 dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 2044 { |
| 4390 | 2045 char last_char = dir[dir.length () - 1]; |
| 4407 | 2046 |
| 4390 | 2047 std::string saved_dir = dir; |
| 4407 | 2048 |
| 2049 if (! (IS_DIR_SEP (last_char) || IS_DEVICE_SEP (last_char))) | |
| 4390 | 2050 saved_dir += DIR_SEP_STRING; |
| 4391 | 2051 |
| 4378 | 2052 str_llist_add (l, saved_dir); |
| 2053 } | |
| 2054 | |
| 4390 | 2055 /* Return true if FN is a directory or a symlink to a directory, |
| 2056 false if not. */ | |
| 2057 | |
| 2058 static bool | |
| 2059 dir_p (const std::string& fn) | |
| 2060 { | |
| 2061 #ifdef WIN32 | |
| 4391 | 2062 unsigned int fa = GetFileAttributes (fn.c_str ()); |
| 4390 | 2063 return (fa != 0xFFFFFFFF && (fa & FILE_ATTRIBUTE_DIRECTORY)); |
| 2064 #else | |
| 2065 struct stat stats; | |
| 2066 return stat (fn.c_str (), &stats) == 0 && S_ISDIR (stats.st_mode); | |
| 2067 #endif | |
| 2068 } | |
| 4391 | 2069 |
| 4378 | 2070 /* If DIR is a directory, add it to the list L. */ |
| 2071 | |
| 2072 static void | |
| 4390 | 2073 checked_dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 2074 { |
| 2075 if (dir_p (dir)) | |
| 2076 dir_list_add (l, dir); | |
| 2077 } | |
| 4392 | 2078 |
| 4378 | 2079 /* The cache. Typically, several paths have the same element; for |
| 2080 example, /usr/local/lib/texmf/fonts//. We don't want to compute the | |
| 2081 expansion of such a thing more than once. Even though we also cache | |
| 2082 the dir_links call, that's not enough -- without this path element | |
| 2083 caching as well, the execution time doubles. */ | |
| 2084 | |
| 4398 | 2085 struct cache_entry |
| 4378 | 2086 { |
|
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2087 cache_entry (void) : key (), value (0) { } |
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2088 |
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2089 ~cache_entry (void) { } |
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2090 |
| 4398 | 2091 std::string key; |
| 4378 | 2092 str_llist_type *value; |
| 4398 | 2093 }; |
| 2094 | |
| 2095 static cache_entry *the_cache = 0; | |
| 4378 | 2096 static unsigned cache_length = 0; |
| 2097 | |
| 2098 /* Associate KEY with VALUE. We implement the cache as a simple linear | |
| 2099 list, since it's unlikely to ever be more than a dozen or so elements | |
| 2100 long. We don't bother to check here if PATH has already been saved; | |
| 2101 we always add it to our list. We copy KEY but not VALUE; not sure | |
| 2102 that's right, but it seems to be all that's needed. */ | |
| 2103 | |
| 2104 static void | |
| 4398 | 2105 cache (const std::string key, str_llist_type *value) |
| 4378 | 2106 { |
| 4398 | 2107 cache_entry *new_cache = new cache_entry [cache_length+1]; |
| 2108 | |
| 4399 | 2109 for (unsigned i = 0; i < cache_length; i++) |
| 4398 | 2110 { |
| 2111 new_cache[i].key = the_cache[i].key; | |
| 2112 new_cache[i].value = the_cache[i].value; | |
| 2113 } | |
| 2114 | |
| 2115 delete [] the_cache; | |
| 2116 | |
| 2117 the_cache = new_cache; | |
| 2118 | |
| 2119 the_cache[cache_length].key = key; | |
| 2120 the_cache[cache_length].value = value; | |
| 2121 | |
| 4378 | 2122 cache_length++; |
| 2123 } | |
| 2124 | |
| 2125 /* To retrieve, just check the list in order. */ | |
| 2126 | |
| 2127 static str_llist_type * | |
| 4398 | 2128 cached (const std::string& key) |
| 4378 | 2129 { |
| 2130 unsigned p; | |
| 4391 | 2131 |
| 4378 | 2132 for (p = 0; p < cache_length; p++) |
| 2133 { | |
| 4398 | 2134 if (key == the_cache[p].key) |
| 4378 | 2135 return the_cache[p].value; |
| 2136 } | |
| 4391 | 2137 |
| 4398 | 2138 return 0; |
| 4378 | 2139 } |
| 4392 | 2140 |
| 4378 | 2141 /* Handle the magic path constructs. */ |
| 2142 | |
| 2143 /* Declare recursively called routine. */ | |
| 4398 | 2144 static void expand_elt (str_llist_type *, const std::string&, unsigned); |
| 4378 | 2145 |
| 2146 /* POST is a pointer into the original element (which may no longer be | |
| 2147 ELT) to just after the doubled DIR_SEP, perhaps to the null. Append | |
| 2148 subdirectories of ELT (up to ELT_LENGTH, which must be a /) to | |
| 2149 STR_LIST_PTR. */ | |
| 2150 | |
| 2151 #ifdef WIN32 | |
| 4398 | 2152 |
| 4378 | 2153 /* Shared across recursive calls, it acts like a stack. */ |
| 4398 | 2154 static std::string dirname; |
| 2155 | |
| 2156 #else /* WIN32 */ | |
| 2157 | |
| 2158 /* Return -1 if FN isn't a directory, else its number of links. | |
| 2159 Duplicate the call to stat; no need to incur overhead of a function | |
| 2160 call for that little bit of cleanliness. */ | |
| 2161 | |
| 2162 static int | |
| 2163 dir_links (const std::string& fn) | |
| 2164 { | |
| 2165 std::map<std::string, long> link_table; | |
| 2166 | |
| 2167 long ret; | |
| 2168 | |
| 2169 if (link_table.find (fn) != link_table.end ()) | |
| 2170 ret = link_table[fn]; | |
| 2171 else | |
| 2172 { | |
| 2173 struct stat stats; | |
| 2174 | |
| 2175 ret = stat (fn.c_str (), &stats) == 0 && S_ISDIR (stats.st_mode) | |
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2176 ? stats.st_nlink : static_cast<unsigned> (-1); |
| 4398 | 2177 |
| 2178 link_table[fn] = ret; | |
| 2179 | |
| 2180 #ifdef KPSE_DEBUG | |
| 2181 if (KPSE_DEBUG_P (KPSE_DEBUG_STAT)) | |
| 2182 DEBUGF2 ("dir_links (%s) => %ld\n", fn.c_str (), ret); | |
| 4378 | 2183 #endif |
| 4398 | 2184 } |
| 2185 | |
| 2186 return ret; | |
| 2187 } | |
| 2188 | |
| 2189 #endif /* WIN32 */ | |
| 4378 | 2190 |
| 2191 static void | |
| 4398 | 2192 do_subdir (str_llist_type *str_list_ptr, const std::string& elt, |
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2193 unsigned elt_length, const std::string& post) |
| 4378 | 2194 { |
| 2195 #ifdef WIN32 | |
| 2196 WIN32_FIND_DATA find_file_data; | |
| 2197 HANDLE hnd; | |
| 2198 int proceed; | |
| 2199 #else | |
| 2200 DIR *dir; | |
| 2201 struct dirent *e; | |
| 2202 #endif /* not WIN32 */ | |
| 4389 | 2203 |
| 4398 | 2204 std::string name = elt.substr (0, elt_length); |
| 4389 | 2205 |
| 4378 | 2206 assert (IS_DIR_SEP (elt[elt_length - 1]) |
| 2207 || IS_DEVICE_SEP (elt[elt_length - 1])); | |
| 4391 | 2208 |
| 4378 | 2209 #if defined (WIN32) |
| 4398 | 2210 |
| 2211 dirname = name + "/*.*"; /* "*.*" or "*" -- seems equivalent. */ | |
| 2212 | |
| 2213 hnd = FindFirstFile (dirname.c_str (), &find_file_data); | |
| 4378 | 2214 |
| 4389 | 2215 if (hnd == INVALID_HANDLE_VALUE) |
| 4378 | 2216 return; |
| 2217 | |
| 2218 /* Include top level before subdirectories, if nothing to match. */ | |
| 4398 | 2219 if (post.empty ()) |
| 4390 | 2220 dir_list_add (str_list_ptr, name); |
| 4398 | 2221 else |
| 2222 { | |
| 2223 /* If we do have something to match, see if it exists. For | |
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2224 example, POST might be 'pk/ljfour', and they might have a |
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2225 directory '$TEXMF/fonts/pk/ljfour' that we should find. */ |
| 4398 | 2226 name += post; |
| 2227 expand_elt (str_list_ptr, name, elt_length); | |
| 2228 name.resize (elt_length); | |
| 2229 } | |
| 2230 | |
| 4378 | 2231 proceed = 1; |
| 4398 | 2232 |
| 4391 | 2233 while (proceed) |
| 2234 { | |
| 2235 if (find_file_data.cFileName[0] != '.') | |
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2236 { |
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2237 /* Construct the potential subdirectory name. */ |
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2238 name += find_file_data.cFileName; |
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2239 |
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2240 if (find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
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2241 { |
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2242 /* It's a directory, so append the separator. */ |
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2243 name += DIR_SEP_STRING; |
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2244 unsigned potential_len = name.length (); |
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2245 |
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2246 do_subdir (str_list_ptr, name, potential_len, post); |
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2247 } |
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2248 name.resize (elt_length); |
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2249 } |
| 4398 | 2250 |
| 4391 | 2251 proceed = FindNextFile (hnd, &find_file_data); |
| 4378 | 2252 } |
| 4398 | 2253 |
| 4391 | 2254 FindClose (hnd); |
| 4378 | 2255 |
| 2256 #else /* not WIN32 */ | |
| 2257 | |
| 2258 /* If we can't open it, quit. */ | |
| 10411 | 2259 dir = gnulib::opendir (name.c_str ()); |
| 4398 | 2260 |
| 2261 if (! dir) | |
| 4389 | 2262 return; |
| 4391 | 2263 |
| 4378 | 2264 /* Include top level before subdirectories, if nothing to match. */ |
| 4398 | 2265 if (post.empty ()) |
| 4390 | 2266 dir_list_add (str_list_ptr, name); |
| 4378 | 2267 else |
| 4398 | 2268 { |
| 2269 /* If we do have something to match, see if it exists. For | |
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2270 example, POST might be 'pk/ljfour', and they might have a |
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2271 directory '$TEXMF/fonts/pk/ljfour' that we should find. */ |
| 4389 | 2272 name += post; |
| 4398 | 2273 expand_elt (str_list_ptr, name, elt_length); |
| 4389 | 2274 name.resize (elt_length); |
| 4378 | 2275 } |
| 2276 | |
| 14155 | 2277 while ((e = gnulib::readdir (dir))) |
| 4398 | 2278 { |
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2279 /* If it begins with a '.', never mind. (This allows "hidden" |
| 4378 | 2280 directories that the algorithm won't find.) */ |
| 4398 | 2281 |
| 4378 | 2282 if (e->d_name[0] != '.') |
| 2283 { | |
| 2284 int links; | |
| 4391 | 2285 |
| 4378 | 2286 /* Construct the potential subdirectory name. */ |
| 4389 | 2287 name += e->d_name; |
| 4391 | 2288 |
| 4378 | 2289 /* If we can't stat it, or if it isn't a directory, continue. */ |
| 4398 | 2290 links = dir_links (name); |
| 4378 | 2291 |
| 2292 if (links >= 0) | |
| 4391 | 2293 { |
| 4378 | 2294 /* It's a directory, so append the separator. */ |
| 4389 | 2295 name += DIR_SEP_STRING; |
| 2296 unsigned potential_len = name.length (); | |
| 4391 | 2297 |
| 4378 | 2298 /* Should we recurse? To see if the subdirectory is a |
| 2299 leaf, check if it has two links (one for . and one for | |
| 2300 ..). This means that symbolic links to directories do | |
| 2301 not affect the leaf-ness. This is arguably wrong, but | |
| 2302 the only alternative I know of is to stat every entry | |
| 2303 in the directory, and that is unacceptably slow. | |
| 4391 | 2304 |
| 4378 | 2305 The #ifdef here makes all this configurable at |
| 2306 compile-time, so that if we're using VMS directories or | |
| 2307 some such, we can still find subdirectories, even if it | |
| 2308 is much slower. */ | |
| 2309 #ifdef ST_NLINK_TRICK | |
| 5622 | 2310 if (links != 2) |
| 4378 | 2311 #endif /* not ST_NLINK_TRICK */ |
| 2312 /* All criteria are met; find subdirectories. */ | |
| 4398 | 2313 do_subdir (str_list_ptr, name, potential_len, post); |
| 4378 | 2314 #ifdef ST_NLINK_TRICK |
| 4398 | 2315 else if (post.empty ()) |
| 4378 | 2316 /* Nothing to match, no recursive subdirectories to |
| 2317 look for: we're done with this branch. Add it. */ | |
| 4390 | 2318 dir_list_add (str_list_ptr, name); |
| 4378 | 2319 #endif |
| 2320 } | |
| 2321 | |
|
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2322 /* Remove the directory entry we just checked from 'name'. */ |
| 4389 | 2323 name.resize (elt_length); |
| 4378 | 2324 } |
| 2325 } | |
| 4391 | 2326 |
| 4378 | 2327 xclosedir (dir); |
| 2328 #endif /* not WIN32 */ | |
| 2329 } | |
| 2330 | |
| 2331 /* Assume ELT is non-empty and non-NULL. Return list of corresponding | |
| 2332 directories (with no terminating NULL entry) in STR_LIST_PTR. Start | |
| 2333 looking for magic constructs at START. */ | |
| 2334 | |
| 2335 static void | |
| 4398 | 2336 expand_elt (str_llist_type *str_list_ptr, const std::string& elt, |
|
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2337 unsigned /* start */) |
| 4378 | 2338 { |
| 6306 | 2339 #if 0 |
| 2340 // We don't want magic constructs. | |
| 2341 | |
| 4398 | 2342 size_t elt_len = elt.length (); |
| 2343 | |
| 2344 size_t dir = start; | |
| 2345 | |
| 2346 | |
| 2347 while (dir < elt_len) | |
| 4378 | 2348 { |
| 4398 | 2349 if (IS_DIR_SEP (elt[dir])) |
| 4378 | 2350 { |
| 2351 /* If two or more consecutive /'s, find subdirectories. */ | |
| 4398 | 2352 if (++dir < elt_len && IS_DIR_SEP (elt[dir])) |
| 4378 | 2353 { |
|
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2354 size_t i = dir; |
|
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2355 while (i < elt_len && IS_DIR_SEP (elt[i])) |
|
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2356 i++; |
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2357 |
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2358 std::string post = elt.substr (i); |
| 4398 | 2359 |
| 2360 do_subdir (str_list_ptr, elt, dir, post); | |
| 2361 | |
|
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2362 return; |
| 4378 | 2363 } |
| 2364 | |
| 2365 /* No special stuff at this slash. Keep going. */ | |
| 2366 } | |
| 4398 | 2367 else |
|
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2368 dir++; |
| 4378 | 2369 } |
| 6306 | 2370 #endif |
| 4391 | 2371 |
| 4378 | 2372 /* When we reach the end of ELT, it will be a normal filename. */ |
| 2373 checked_dir_list_add (str_list_ptr, elt); | |
| 2374 } | |
| 4392 | 2375 |
| 4378 | 2376 /* Here is the entry point. Returns directory list for ELT. */ |
| 2377 | |
| 4399 | 2378 /* Given a path element ELT, return a pointer to a NULL-terminated list |
| 2379 of the corresponding (existing) directory or directories, with | |
| 2380 trailing slashes, or NULL. If ELT is the empty string, check the | |
| 2381 current working directory. | |
|
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2382 |
| 4399 | 2383 It's up to the caller to expand ELT. This is because this routine is |
|
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|
2384 most likely only useful to be called from 'kpse_path_search', which |
| 4399 | 2385 has already assumed expansion has been done. */ |
| 2386 | |
| 2387 static str_llist_type * | |
| 4398 | 2388 kpse_element_dirs (const std::string& elt) |
| 4378 | 2389 { |
| 2390 str_llist_type *ret; | |
| 2391 | |
| 2392 /* If given nothing, return nothing. */ | |
| 4398 | 2393 if (elt.empty ()) |
| 2394 return 0; | |
| 4378 | 2395 |
| 2396 /* If we've already cached the answer for ELT, return it. */ | |
| 2397 ret = cached (elt); | |
| 2398 if (ret) | |
| 2399 return ret; | |
| 2400 | |
| 2401 /* We're going to have a real directory list to return. */ | |
| 4390 | 2402 ret = new str_llist_type; |
| 4398 | 2403 *ret = 0; |
| 4378 | 2404 |
| 2405 /* We handle the hard case in a subroutine. */ | |
| 2406 expand_elt (ret, elt, 0); | |
| 2407 | |
| 2408 /* Remember the directory list we just found, in case future calls are | |
| 2409 made with the same ELT. */ | |
| 2410 cache (elt, ret); | |
| 2411 | |
| 2412 #ifdef KPSE_DEBUG | |
| 2413 if (KPSE_DEBUG_P (KPSE_DEBUG_EXPAND)) | |
| 2414 { | |
| 4398 | 2415 DEBUGF1 ("path element %s =>", elt.c_str ()); |
| 4378 | 2416 if (ret) |
| 2417 { | |
| 2418 str_llist_elt_type *e; | |
| 2419 for (e = *ret; e; e = STR_LLIST_NEXT (*e)) | |
| 10411 | 2420 gnulib::fprintf (stderr, " %s", (STR_LLIST (*e)).c_str ()); |
| 4378 | 2421 } |
| 10411 | 2422 gnulib::putc ('\n', stderr); |
|
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2423 gnulib::fflush (stderr); |
| 4378 | 2424 } |
| 2425 #endif /* KPSE_DEBUG */ | |
| 2426 | |
| 2427 return ret; | |
| 2428 } | |
| 2429 | |
| 4386 | 2430 #ifndef WIN32 |
| 4385 | 2431 void |
| 2432 xclosedir (DIR *d) | |
| 2433 { | |
| 10411 | 2434 int ret = gnulib::closedir (d); |
| 4391 | 2435 |
| 4385 | 2436 if (ret != 0) |
| 2437 FATAL ("closedir failed"); | |
| 2438 } | |
| 4386 | 2439 #endif |
| 4385 | 2440 |
| 4399 | 2441 /* Implementation of a linked list of strings. */ |
| 4385 | 2442 |
| 2443 /* Add the new string STR to the end of the list L. */ | |
| 2444 | |
| 5085 | 2445 static void |
| 4390 | 2446 str_llist_add (str_llist_type *l, const std::string& str) |
| 4385 | 2447 { |
| 2448 str_llist_elt_type *e; | |
| 4390 | 2449 str_llist_elt_type *new_elt = new str_llist_elt_type; |
| 4391 | 2450 |
| 4385 | 2451 /* The new element will be at the end of the list. */ |
| 2452 STR_LLIST (*new_elt) = str; | |
| 2453 STR_LLIST_MOVED (*new_elt) = 0; | |
| 4398 | 2454 STR_LLIST_NEXT (*new_elt) = 0; |
| 4391 | 2455 |
| 4385 | 2456 /* Find the current end of the list. */ |
| 2457 for (e = *l; e && STR_LLIST_NEXT (*e); e = STR_LLIST_NEXT (*e)) | |
| 2458 ; | |
| 4391 | 2459 |
| 2460 if (! e) | |
| 4385 | 2461 *l = new_elt; |
| 2462 else | |
| 2463 STR_LLIST_NEXT (*e) = new_elt; | |
| 2464 } | |
| 4392 | 2465 |
| 4385 | 2466 /* Move an element towards the top. The idea is that when a file is |
| 2467 found in a given directory, later files will likely be in that same | |
| 2468 directory, and looking for the file in all the directories in between | |
| 2469 is thus a waste. */ | |
| 2470 | |
| 5085 | 2471 static void |
| 4385 | 2472 str_llist_float (str_llist_type *l, str_llist_elt_type *mover) |
| 2473 { | |
| 2474 str_llist_elt_type *last_moved, *unmoved; | |
| 4391 | 2475 |
| 4385 | 2476 /* If we've already moved this element, never mind. */ |
| 2477 if (STR_LLIST_MOVED (*mover)) | |
| 2478 return; | |
| 4391 | 2479 |
| 4385 | 2480 /* Find the first unmoved element (to insert before). We're |
| 2481 guaranteed this will terminate, since MOVER itself is currently | |
| 2482 unmoved, and it must be in L (by hypothesis). */ | |
| 4398 | 2483 for (last_moved = 0, unmoved = *l; STR_LLIST_MOVED (*unmoved); |
| 4385 | 2484 last_moved = unmoved, unmoved = STR_LLIST_NEXT (*unmoved)) |
| 2485 ; | |
| 2486 | |
| 2487 /* If we are the first unmoved element, nothing to relink. */ | |
| 2488 if (unmoved != mover) | |
|
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2489 { |
|
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|
2490 /* Remember 'mover's current successor, so we can relink 'mover's |
| 4385 | 2491 predecessor to it. */ |
| 2492 str_llist_elt_type *before_mover; | |
| 2493 str_llist_elt_type *after_mover = STR_LLIST_NEXT (*mover); | |
| 4391 | 2494 |
|
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2495 /* Find 'mover's predecessor. */ |
| 4385 | 2496 for (before_mover = unmoved; STR_LLIST_NEXT (*before_mover) != mover; |
| 2497 before_mover = STR_LLIST_NEXT (*before_mover)) | |
| 2498 ; | |
| 4391 | 2499 |
|
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2500 /* 'before_mover' now links to 'after_mover'. */ |
| 4385 | 2501 STR_LLIST_NEXT (*before_mover) = after_mover; |
| 2502 | |
|
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2503 /* Insert 'mover' before 'unmoved' and after 'last_moved' (or at |
| 4385 | 2504 the head of the list). */ |
| 2505 STR_LLIST_NEXT (*mover) = unmoved; | |
| 4391 | 2506 if (! last_moved) |
| 4385 | 2507 *l = mover; |
| 2508 else | |
| 2509 STR_LLIST_NEXT (*last_moved) = mover; | |
| 2510 } | |
| 2511 | |
| 2512 /* We've moved it. */ | |
| 2513 STR_LLIST_MOVED (*mover) = 1; | |
| 2514 } | |
| 2515 | |
| 4399 | 2516 /* Variable expansion. */ |
| 4385 | 2517 |
| 2518 /* We have to keep track of variables being expanded, otherwise | |
| 2519 constructs like TEXINPUTS = $TEXINPUTS result in an infinite loop. | |
| 2520 (Or indirectly recursive variables, etc.) Our simple solution is to | |
| 2521 add to a list each time an expansion is started, and check the list | |
| 2522 before expanding. */ | |
| 2523 | |
| 4391 | 2524 static std::map <std::string, bool> expansions; |
| 4385 | 2525 |
| 2526 static void | |
| 4391 | 2527 expanding (const std::string& var, bool xp) |
| 4385 | 2528 { |
| 4391 | 2529 expansions[var] = xp; |
| 4385 | 2530 } |
| 2531 | |
| 2532 /* Return whether VAR is currently being expanding. */ | |
| 2533 | |
| 4391 | 2534 static bool |
| 2535 expanding_p (const std::string& var) | |
| 4385 | 2536 { |
|
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|
2537 return (expansions.find (var) != expansions.end ()) ? expansions[var] : false; |
| 4385 | 2538 } |
| 4392 | 2539 |
|
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2540 /* Append the result of value of 'var' to EXPANSION, where 'var' begins |
|
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|
2541 at START and ends at END. If 'var' is not set, do not complain. |
| 4385 | 2542 This is a subroutine for the more complicated expansion function. */ |
| 2543 | |
| 2544 static void | |
| 4391 | 2545 expand (std::string &expansion, const std::string& var) |
| 4385 | 2546 { |
| 4391 | 2547 if (expanding_p (var)) |
| 2548 { | |
|
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|
2549 (*current_liboctave_warning_with_id_handler) |
|
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2550 ("Octave:pathsearch-syntax", |
|
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2551 "kpathsea: variable '%s' references itself (eventually)", |
|
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|
2552 var.c_str ()); |
| 4385 | 2553 } |
| 4391 | 2554 else |
| 2555 { | |
| 2556 /* Check for an environment variable. */ | |
| 2557 std::string value = octave_env::getenv (var); | |
| 2558 | |
| 2559 if (! value.empty ()) | |
|
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2560 { |
|
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|
2561 expanding (var, true); |
|
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|
2562 std::string tmp = kpse_var_expand (value); |
|
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2563 expanding (var, false); |
|
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2564 expansion += tmp; |
|
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|
2565 } |
| 4391 | 2566 } |
| 4385 | 2567 } |
| 4392 | 2568 |
| 4385 | 2569 /* Can't think of when it would be useful to change these (and the |
| 2570 diagnostic messages assume them), but ... */ | |
| 2571 #ifndef IS_VAR_START /* starts all variable references */ | |
| 2572 #define IS_VAR_START(c) ((c) == '$') | |
| 2573 #endif | |
| 2574 #ifndef IS_VAR_CHAR /* variable name constituent */ | |
| 2575 #define IS_VAR_CHAR(c) (isalnum (c) || (c) == '_') | |
| 2576 #endif | |
| 2577 #ifndef IS_VAR_BEGIN_DELIMITER /* start delimited variable name (after $) */ | |
| 2578 #define IS_VAR_BEGIN_DELIMITER(c) ((c) == '{') | |
| 2579 #endif | |
| 2580 #ifndef IS_VAR_END_DELIMITER | |
| 2581 #define IS_VAR_END_DELIMITER(c) ((c) == '}') | |
| 2582 #endif | |
| 2583 | |
| 2584 /* Maybe we should support some or all of the various shell ${...} | |
| 2585 constructs, especially ${var-value}. */ | |
| 2586 | |
| 5085 | 2587 static std::string |
| 4391 | 2588 kpse_var_expand (const std::string& src) |
| 4385 | 2589 { |
| 4389 | 2590 std::string expansion; |
| 4391 | 2591 |
| 2592 size_t src_len = src.length (); | |
| 2593 | |
| 4385 | 2594 /* Copy everything but variable constructs. */ |
| 4391 | 2595 for (size_t i = 0; i < src_len; i++) |
| 2596 { | |
| 2597 if (IS_VAR_START (src[i])) | |
|
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2598 { |
|
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2599 i++; |
|
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2600 |
|
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2601 /* Three cases: '$VAR', '${VAR}', '$<anything-else>'. */ |
|
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2602 if (IS_VAR_CHAR (src[i])) |
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2603 { |
|
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2604 /* $V: collect name constituents, then expand. */ |
|
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2605 size_t var_end = i; |
|
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2606 |
|
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2607 do |
|
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2608 { |
|
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2609 var_end++; |
|
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2610 } |
|
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2611 while (IS_VAR_CHAR (src[var_end])); |
|
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2612 |
|
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2613 var_end--; /* had to go one past */ |
|
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2614 expand (expansion, src.substr (i, var_end - i + 1)); |
|
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2615 i = var_end; |
|
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2616 |
|
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2617 } |
|
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2618 else if (IS_VAR_BEGIN_DELIMITER (src[i])) |
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2619 { |
|
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2620 /* ${: scan ahead for matching delimiter, then expand. */ |
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2621 size_t var_end = ++i; |
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2622 |
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2623 while (var_end < src_len && !IS_VAR_END_DELIMITER (src[var_end])) |
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2624 var_end++; |
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2625 |
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2626 if (var_end == src_len) |
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2627 { |
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2628 (*current_liboctave_warning_with_id_handler) |
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2629 ("Octave:pathsearch-syntax", |
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2630 "%s: No matching } for ${", src.c_str ()); |
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2631 i = var_end - 1; /* will incr to eos at top of loop */ |
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2632 } |
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2633 else |
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2634 { |
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2635 expand (expansion, src.substr (i, var_end - i)); |
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2636 i = var_end; /* will incr past } at top of loop*/ |
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2637 } |
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2638 } |
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2639 else |
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2640 { |
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2641 /* $<something-else>: error. */ |
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2642 (*current_liboctave_warning_with_id_handler) |
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2643 ("Octave:pathsearch-syntax", |
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2644 "%s: Unrecognized variable construct '$%c'", |
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2645 src.c_str (), src[i]); |
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2646 |
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2647 /* Just ignore those chars and keep going. */ |
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2648 } |
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2649 } |
| 4391 | 2650 else |
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2651 expansion += src[i]; |
| 4391 | 2652 } |
| 4389 | 2653 |
| 2654 return expansion; | |
| 4385 | 2655 } |