Mercurial > octave
annotate liboctave/util/kpse.cc @ 21865:0469ae203a1d
more kpse.cc updates
* kpse.cc (KPATHSEA, stat, EXPAND_DEFAULT): Delete unused macros.
(kpse_db_search, kpse_hash, hash_lookup, elt_in_db): Delete unused functions.
(hash_element_type, hash_table_type, kpse_format_info_type):
Delete struct definitions.
(READABLE): Implement using octave::sys::file_stat. Eliminate struct
stat argument.
(dir_p, dir_links): Implement using octave::sys::file_stat.
(kpse_readable_file): Update.
(kpse_absolute_p): Implement using octave::sys::env::absolute_pathname
and octave::sys::env::rooted_relative_pathname.
(path_search, search, path_find_first_of): Always search disk.
(kpse_format_info, db, alias_db, db_dir_list): Delete unused static
variables.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 10 Jun 2016 22:27:22 -0400 |
| parents | f3487b21e879 |
| children | 0cdfd6d230e6 |
| rev | line source |
|---|---|
|
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1 // This file is not compiled to a separate object file. |
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2 // It is included in pathsearch.cc. |
| 4399 | 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 |
|
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29 // This file should not include config.h. It is only included in other |
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30 // C++ source files that should have included config.h before including |
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31 // this file. |
| 4378 | 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 extern "C" { | |
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47 #if defined (__MINGW32__) |
| 4399 | 48 #include <windows.h> |
| 49 #include <fcntl.h> | |
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50 #elif defined (WIN32) |
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51 #if ! defined (_MSC_VER) |
| 4399 | 52 #define __STDC__ 1 |
| 53 #include "win32lib.h" | |
| 6106 | 54 #endif |
| 4399 | 55 #endif /* not WIN32 */ |
| 56 } | |
| 57 | |
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58 /* System dependencies that are figured out by 'configure'. If we are |
| 4399 | 59 compiling standalone, we get our c-auto.h. Otherwise, the package |
| 60 containing us must provide this (unless it can somehow generate ours | |
| 61 from c-auto.in). We use <...> instead of "..." so that the current | |
| 62 cpp directory (i.e., kpathsea/) won't be searched. */ | |
| 63 | |
| 64 /* If you want to find subdirectories in a directory with non-Unix | |
| 65 semantics (specifically, if a directory with no subdirectories does | |
| 5622 | 66 not have exactly two links), define this. */ |
|
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67 #if ! defined (DOSISH) |
| 4399 | 68 #define ST_NLINK_TRICK |
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69 #endif /* not DOSISH */ |
| 4399 | 70 |
| 11236 | 71 /* Define the characters which separate components of |
| 72 filenames and environment variable paths. */ | |
| 73 | |
| 74 /* What separates filename components? */ | |
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75 #if ! defined (DIR_SEP) |
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76 #if defined (DOSISH) |
| 11236 | 77 /* Either \'s or 's work. Wayne Sullivan's web2pc prefers /, so we'll |
| 78 go with that. */ | |
| 79 #define DIR_SEP '/' | |
| 80 #define DIR_SEP_STRING "/" | |
| 81 #define IS_DEVICE_SEP(ch) ((ch) == ':') | |
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82 #define NAME_BEGINS_WITH_DEVICE(name) ((name.length ()>0) && IS_DEVICE_SEP((name)[1])) |
| 11236 | 83 /* On DOS, it's good to allow both \ and / between directories. */ |
| 84 #define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\') | |
| 85 #else | |
| 86 #define DIR_SEP '/' | |
| 87 #define DIR_SEP_STRING "/" | |
| 88 #endif /* not DOSISH */ | |
| 89 #endif /* not DIR_SEP */ | |
| 90 | |
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91 #if ! defined (IS_DIR_SEP) |
| 11236 | 92 #define IS_DIR_SEP(ch) ((ch) == DIR_SEP) |
| 93 #endif | |
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94 #if ! defined (IS_DEVICE_SEP) |
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95 /* No 'devices' on, e.g., Unix. */ |
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96 #define IS_DEVICE_SEP(ch) 0 |
| 11236 | 97 #endif |
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98 #if ! defined (NAME_BEGINS_WITH_DEVICE) |
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99 #define NAME_BEGINS_WITH_DEVICE(name) 0 |
| 11236 | 100 #endif |
| 4378 | 101 |
| 21865 | 102 #include "file-stat.h" |
| 4396 | 103 #include "lo-error.h" |
| 4391 | 104 #include "oct-env.h" |
| 105 #include "oct-passwd.h" | |
| 4399 | 106 #include "str-vec.h" |
| 4385 | 107 |
| 108 /* Header files that essentially all of our sources need, and | |
| 109 that all implementations have. We include these first, to help with | |
| 110 NULL being defined multiple times. */ | |
| 111 #include <cstdio> | |
| 112 #include <cstdarg> | |
| 113 #include <cstdlib> | |
| 114 #include <cerrno> | |
| 115 #include <cassert> | |
| 116 | |
| 117 #include <sys/types.h> | |
| 118 #include <unistd.h> | |
| 119 | |
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120 #include <dirent.h> |
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121 |
| 4385 | 122 /* define NAME_MAX, the maximum length of a single |
| 123 component in a filename. No such limit may exist, or may vary | |
| 124 depending on the filesystem. */ | |
| 125 | |
| 126 /* Most likely the system will truncate filenames if it is not POSIX, | |
| 127 and so we can use the BSD value here. */ | |
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128 #if ! defined (_POSIX_NAME_MAX) |
| 4385 | 129 #define _POSIX_NAME_MAX 255 |
| 130 #endif | |
| 131 | |
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132 #if ! defined (NAME_MAX) |
| 4385 | 133 #define NAME_MAX _POSIX_NAME_MAX |
| 134 #endif | |
| 135 | |
| 136 #include <cctype> | |
| 137 | |
| 138 /* What separates elements in environment variable path lists? */ | |
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139 #if ! defined (ENV_SEP) |
| 5451 | 140 #if defined (SEPCHAR) && defined (SEPCHAR_STR) |
| 141 #define ENV_SEP SEPCHAR | |
| 142 #define ENV_SEP_STRING SEPCHAR_STR | |
| 143 #elif defined (DOSISH) | |
| 4385 | 144 #define ENV_SEP ';' |
| 145 #define ENV_SEP_STRING ";" | |
| 146 #else | |
| 147 #define ENV_SEP ':' | |
| 148 #define ENV_SEP_STRING ":" | |
| 149 #endif /* not DOS */ | |
| 150 #endif /* not ENV_SEP */ | |
| 151 | |
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152 #if ! defined (IS_ENV_SEP) |
| 4385 | 153 #define IS_ENV_SEP(ch) ((ch) == ENV_SEP) |
| 154 #endif | |
| 155 | |
| 4399 | 156 /* define PATH_MAX, the maximum length of a filename. Since no such |
| 157 limit may exist, it's preferable to dynamically grow filenames as | |
| 158 needed. */ | |
| 4385 | 159 |
| 160 /* Cheat and define this as a manifest constant no matter what, instead | |
| 161 of using pathconf. I forget why we want to do this. */ | |
| 162 | |
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163 #if ! defined (_POSIX_PATH_MAX) |
| 4385 | 164 #define _POSIX_PATH_MAX 255 |
| 165 #endif | |
| 166 | |
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167 #if ! defined (PATH_MAX) |
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168 #if defined (MAXPATHLEN) |
| 4385 | 169 #define PATH_MAX MAXPATHLEN |
| 170 #else | |
| 171 #define PATH_MAX _POSIX_PATH_MAX | |
| 172 #endif | |
| 173 #endif /* not PATH_MAX */ | |
| 174 | |
| 175 /* If NO_DEBUG is defined (not recommended), skip all this. */ | |
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176 #if ! defined (NO_DEBUG) |
| 4385 | 177 |
| 178 /* OK, we'll have tracing support. */ | |
| 179 #define KPSE_DEBUG | |
| 180 | |
| 181 /* Test if a bit is on. */ | |
| 182 #define KPSE_DEBUG_P(bit) (kpathsea_debug & (1 << (bit))) | |
| 183 | |
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184 #define KPSE_DEBUG_STAT 0 /* stat calls */ |
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185 #define KPSE_DEBUG_HASH 1 /* hash lookups */ |
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186 #define KPSE_DEBUG_FOPEN 2 /* fopen/fclose calls */ |
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187 #define KPSE_DEBUG_PATHS 3 /* search path initializations */ |
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188 #define KPSE_DEBUG_EXPAND 4 /* path element expansion */ |
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189 #define KPSE_DEBUG_SEARCH 5 /* searches */ |
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190 #define KPSE_DEBUG_VARS 6 /* variable values */ |
| 4385 | 191 #define KPSE_LAST_DEBUG KPSE_DEBUG_VARS |
| 192 | |
| 193 /* A printf for the debugging. */ | |
| 10411 | 194 #define DEBUGF_START() do { gnulib::fputs ("kdebug:", stderr) |
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195 #define DEBUGF_END() gnulib::fflush (stderr); } while (0) |
| 4385 | 196 |
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197 #define DEBUGF(str) \ |
| 10411 | 198 DEBUGF_START (); gnulib::fputs (str, stderr); DEBUGF_END () |
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199 #define DEBUGF1(str, e1) \ |
| 10411 | 200 DEBUGF_START (); gnulib::fprintf (stderr, str, e1); DEBUGF_END () |
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201 #define DEBUGF2(str, e1, e2) \ |
| 10411 | 202 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2); DEBUGF_END () |
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203 #define DEBUGF3(str, e1, e2, e3) \ |
| 10411 | 204 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3); DEBUGF_END () |
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205 #define DEBUGF4(str, e1, e2, e3, e4) \ |
| 10411 | 206 DEBUGF_START (); gnulib::fprintf (stderr, str, e1, e2, e3, e4); DEBUGF_END () |
| 4385 | 207 |
| 208 #endif /* not NO_DEBUG */ | |
| 209 | |
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210 #if defined (KPSE_DEBUG) |
| 4399 | 211 static unsigned int kpathsea_debug = 0; |
| 212 #endif | |
| 213 | |
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214 #if defined (WIN32) && ! defined (__MINGW32__) |
| 4385 | 215 |
| 216 /* System description file for Windows NT. */ | |
| 217 | |
| 218 /* | |
| 219 * Define symbols to identify the version of Unix this is. | |
| 220 * Define all the symbols that apply correctly. | |
| 221 */ | |
| 222 | |
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223 #if ! defined (DOSISH) |
| 4385 | 224 #define DOSISH |
| 225 #endif | |
| 226 | |
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227 #if ! defined (MAXPATHLEN) |
| 4385 | 228 #define MAXPATHLEN _MAX_PATH |
| 4378 | 229 #endif |
| 230 | |
| 4385 | 231 /* These have to be defined because our compilers treat __STDC__ as being |
| 232 defined (most of them anyway). */ | |
| 233 | |
| 234 #define access _access | |
| 235 #define strdup _strdup | |
| 236 | |
| 237 #define S_IFMT _S_IFMT | |
| 238 #define S_IFDIR _S_IFDIR | |
| 239 | |
| 240 /* Define this so that winsock.h definitions don't get included when | |
| 241 windows.h is... For this to have proper effect, config.h must | |
| 4391 | 242 always be included before windows.h. */ |
| 4385 | 243 #define _WINSOCKAPI_ 1 |
| 244 | |
| 245 #include <windows.h> | |
| 246 | |
| 247 /* For proper declaration of environ. */ | |
| 248 #include <io.h> | |
| 249 #include <fcntl.h> | |
| 250 #include <process.h> | |
| 251 | |
| 252 /* ============================================================ */ | |
| 253 | |
| 254 #endif /* WIN32 */ | |
| 255 | |
| 256 /* Define common sorts of messages. */ | |
| 257 | |
| 258 /* This should be called only after a system call fails. Don't exit | |
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259 with status 'errno', because that might be 256, which would mean |
| 4385 | 260 success (exit statuses are truncated to eight bits). */ |
| 4396 | 261 #define FATAL_PERROR(str) \ |
| 262 do \ | |
| 263 { \ | |
| 10411 | 264 gnulib::fputs ("pathsearch: ", stderr); \ |
| 4396 | 265 perror (str); exit (EXIT_FAILURE); \ |
| 266 } \ | |
| 267 while (0) | |
| 268 | |
| 269 #define FATAL(str) \ | |
| 270 do \ | |
| 271 { \ | |
| 10411 | 272 gnulib::fputs ("pathsearch: fatal: ", stderr); \ |
| 273 gnulib::fputs (str, stderr); \ | |
| 274 gnulib::fputs (".\n", stderr); \ | |
| 4396 | 275 exit (1); \ |
| 276 } \ | |
| 277 while (0) | |
| 4385 | 278 |
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279 #if ! defined (WIN32) |
| 4385 | 280 static void xclosedir (DIR *d); |
| 4386 | 281 #endif |
| 4385 | 282 |
| 4399 | 283 /* It's a little bizarre to be using the same type for the list and the |
| 284 elements of the list, but no reason not to in this case, I think -- | |
| 285 we never need a NULL string in the middle of the list, and an extra | |
| 286 NULL/NULL element always at the end is inconsequential. */ | |
| 287 | |
| 288 struct str_llist_elt | |
| 289 { | |
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290 str_llist_elt (void) : str (), moved (0), next (0) { } |
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291 |
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292 ~str_llist_elt (void) { } |
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293 |
| 4399 | 294 std::string str; |
| 295 int moved; | |
| 296 struct str_llist_elt *next; | |
| 297 }; | |
| 298 | |
| 299 typedef str_llist_elt str_llist_elt_type; | |
| 300 typedef str_llist_elt *str_llist_type; | |
| 301 | |
| 302 #define STR_LLIST(sl) ((sl).str) | |
| 303 #define STR_LLIST_MOVED(sl) ((sl).moved) | |
| 304 #define STR_LLIST_NEXT(sl) ((sl).next) | |
| 305 | |
| 4390 | 306 static void str_llist_add (str_llist_type *l, const std::string& str); |
| 4385 | 307 |
| 308 static void str_llist_float (str_llist_type *l, str_llist_elt_type *mover); | |
| 309 | |
| 4389 | 310 static std::string kpse_var_expand (const std::string& src); |
| 4385 | 311 |
| 4399 | 312 static str_llist_type *kpse_element_dirs (const std::string& elt); |
| 313 | |
| 314 static std::string kpse_expand (const std::string& s); | |
| 315 | |
| 316 static std::string kpse_expand_default (const std::string& path, | |
|
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317 const std::string& dflt); |
| 4399 | 318 |
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319 #include <ctime> /* for 'time' */ |
| 4385 | 320 |
| 4399 | 321 static bool |
| 4394 | 322 kpse_is_env_sep (char c) |
| 323 { | |
| 324 return IS_ENV_SEP (c); | |
| 325 } | |
| 326 | |
| 4392 | 327 /* These routines just check the return status from standard library |
| 328 routines and abort if an error happens. */ | |
| 329 | |
| 330 static FILE * | |
| 4393 | 331 xfopen (const std::string& filename, const char *mode) |
| 4392 | 332 { |
| 333 FILE *f; | |
| 334 | |
| 4393 | 335 assert (! filename.empty () && mode); |
| 336 | |
| 14153 | 337 f = gnulib::fopen (filename.c_str (), mode); |
| 4393 | 338 |
| 339 if (! f) | |
| 340 FATAL_PERROR (filename.c_str ()); | |
| 4392 | 341 |
| 14153 | 342 if (KPSE_DEBUG_P (KPSE_DEBUG_FOPEN)) |
| 343 DEBUGF3 ("fopen (%s, %s) => 0x%lx\n", filename.c_str (), mode, | |
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344 reinterpret_cast<intptr_t> (f)); |
| 14153 | 345 |
| 4392 | 346 return f; |
| 347 } | |
| 348 | |
| 4399 | 349 /* A way to step through a path, extracting one directory name at a |
| 350 time. */ | |
| 351 | |
| 352 class kpse_path_iterator | |
| 353 { | |
| 354 public: | |
| 355 | |
| 356 kpse_path_iterator (const std::string& p) | |
| 357 : path (p), b (0), e (0), len (path.length ()) { set_end (); } | |
| 358 | |
| 359 kpse_path_iterator (const kpse_path_iterator& pi) | |
| 360 : path (pi.path), b (pi.b), e (pi.e), len (pi.len) { } | |
| 361 | |
| 362 kpse_path_iterator operator ++ (int) | |
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363 { |
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364 kpse_path_iterator retval (*this); |
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365 next (); |
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366 return retval; |
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367 } |
| 4399 | 368 |
| 369 std::string operator * (void) { return path.substr (b, e-b); } | |
| 370 | |
| 371 bool operator != (const size_t sz) { return b != sz; } | |
| 372 | |
| 373 private: | |
| 374 | |
| 375 const std::string& path; | |
| 376 size_t b; | |
| 377 size_t e; | |
| 378 size_t len; | |
| 379 | |
| 380 void set_end (void) | |
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381 { |
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382 e = b + 1; |
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383 |
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384 if (e == len) |
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385 ; /* OK, we have found the last element. */ |
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386 else if (e > len) |
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387 b = e = std::string::npos; |
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388 else |
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389 { |
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390 /* Find the next colon not enclosed by braces (or the end of |
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391 the path). */ |
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392 while (e < len && ! kpse_is_env_sep (path[e])) |
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393 e++; |
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394 } |
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395 } |
| 4399 | 396 |
| 397 void next (void) | |
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398 { |
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399 b = e + 1; |
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400 |
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401 /* Skip any consecutive colons. */ |
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402 while (b < len && kpse_is_env_sep (path[b])) |
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403 b++; |
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404 |
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405 if (b >= len) |
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406 b = e = std::string::npos; |
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407 else |
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408 set_end (); |
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409 } |
| 5617 | 410 |
| 411 // No assignment. | |
| 412 kpse_path_iterator& operator = (const kpse_path_iterator&); | |
| 4399 | 413 }; |
| 414 | |
| 4391 | 415 /* Here's the simple one, when a program just wants a value. */ |
| 416 | |
| 417 static std::string | |
| 418 kpse_var_value (const std::string& var) | |
| 419 { | |
| 420 std::string ret; | |
| 421 | |
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422 std::string tmp = octave::sys::env::getenv (var); |
| 4391 | 423 |
| 424 if (! tmp.empty ()) | |
| 425 ret = kpse_var_expand (tmp); | |
| 426 | |
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427 #if defined (KPSE_DEBUG) |
| 4391 | 428 if (KPSE_DEBUG_P (KPSE_DEBUG_VARS)) |
| 429 DEBUGF2 ("variable: %s = %s\n", var.c_str (), | |
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430 tmp.empty () ? "(nil)" : tmp.c_str ()); |
| 4391 | 431 #endif |
| 432 | |
| 433 return ret; | |
| 434 } | |
| 435 | |
| 436 /* Truncate any too-long components in NAME, returning the result. It's | |
| 437 too bad this is necessary. See comments in readable.c for why. */ | |
| 438 | |
| 4393 | 439 static std::string |
| 440 kpse_truncate_filename (const std::string& name) | |
| 4391 | 441 { |
| 442 unsigned c_len = 0; /* Length of current component. */ | |
| 443 unsigned ret_len = 0; /* Length of constructed result. */ | |
| 444 | |
| 4393 | 445 std::string ret = name; |
| 446 | |
| 447 size_t len = name.length (); | |
| 448 | |
| 449 for (size_t i = 0; i < len; i++) | |
| 4391 | 450 { |
| 4393 | 451 if (IS_DIR_SEP (name[i]) || IS_DEVICE_SEP (name[i])) |
| 4391 | 452 { |
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453 /* At a directory delimiter, reset component length. */ |
| 4391 | 454 c_len = 0; |
| 455 } | |
| 456 else if (c_len > NAME_MAX) | |
| 457 { | |
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458 /* If past the max for a component, ignore this character. */ |
| 4391 | 459 continue; |
| 460 } | |
| 461 | |
| 462 /* Copy this character. */ | |
| 4393 | 463 ret[ret_len++] = name[i]; |
| 4391 | 464 c_len++; |
| 465 } | |
| 466 | |
| 4393 | 467 ret.resize (ret_len); |
| 4391 | 468 |
| 469 return ret; | |
| 470 } | |
| 471 | |
| 472 /* If access can read FN, run stat (assigning to stat buffer ST) and | |
| 473 check that fn is not a directory. Don't check for just being a | |
| 474 regular file, as it is potentially useful to read fifo's or some | |
| 475 kinds of devices. */ | |
| 476 | |
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477 #if defined (WIN32) |
| 4391 | 478 static inline bool |
| 21865 | 479 READABLE (const std::string& fn) |
| 4391 | 480 { |
| 4393 | 481 const char *t = fn.c_str (); |
| 482 return (GetFileAttributes (t) != 0xFFFFFFFF | |
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483 && ! (GetFileAttributes (t) & FILE_ATTRIBUTE_DIRECTORY)); |
| 4391 | 484 } |
| 485 #else | |
| 486 static inline bool | |
| 21865 | 487 READABLE (const std::string& fn) |
| 4391 | 488 { |
| 21865 | 489 bool retval = false; |
| 490 | |
| 4393 | 491 const char *t = fn.c_str (); |
| 21865 | 492 |
| 493 if (access (t, R_OK) == 0) | |
| 494 { | |
| 495 octave::sys::file_stat fs (fn); | |
| 496 | |
| 497 retval = fs && ! fs.is_dir (); | |
| 498 } | |
| 499 | |
| 500 return retval; | |
| 4391 | 501 } |
| 502 #endif | |
| 503 | |
| 504 /* POSIX invented the brain-damage of not necessarily truncating | |
| 505 filename components; the system's behavior is defined by the value of | |
| 506 the symbol _POSIX_NO_TRUNC, but you can't change it dynamically! | |
| 507 | |
| 508 Generic const return warning. See extend-fname.c. */ | |
| 509 | |
| 4393 | 510 static std::string |
| 511 kpse_readable_file (const std::string& name) | |
| 4391 | 512 { |
| 4393 | 513 std::string ret; |
| 4391 | 514 |
| 21865 | 515 if (READABLE (name)) |
| 4391 | 516 { |
| 4393 | 517 ret = name; |
| 4391 | 518 |
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519 #if defined (ENAMETOOLONG) |
| 4391 | 520 } |
| 521 else if (errno == ENAMETOOLONG) | |
| 522 { | |
| 523 ret = kpse_truncate_filename (name); | |
| 524 | |
| 525 /* Perhaps some other error will occur with the truncated name, | |
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526 so let's call access again. */ |
| 4391 | 527 |
| 21865 | 528 if (! READABLE (ret)) |
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529 { |
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530 /* Failed. */ |
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531 ret = ""; |
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532 } |
| 4391 | 533 #endif /* ENAMETOOLONG */ |
| 534 | |
| 535 } | |
| 536 else | |
| 537 { | |
| 538 /* Some other error. */ | |
| 539 if (errno == EACCES) | |
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540 { |
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541 /* Maybe warn them if permissions are bad. */ |
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542 perror (name.c_str ()); |
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543 } |
| 4393 | 544 |
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545 ret = ""; |
| 4391 | 546 } |
| 547 | |
| 548 return ret; | |
| 549 } | |
| 550 | |
| 551 static bool | |
| 552 kpse_absolute_p (const std::string& filename, int relative_ok) | |
| 553 { | |
| 21865 | 554 return (octave::sys::env::absolute_pathname (filename) |
| 555 || (relative_ok | |
| 556 && octave::sys::env::rooted_relative_pathname (filename))); | |
| 4391 | 557 } |
| 558 | |
| 4378 | 559 /* The very first search is for texmf.cnf, called when someone tries to |
| 560 initialize the TFM path or whatever. init_path calls kpse_cnf_get | |
| 561 which calls kpse_all_path_search to find all the texmf.cnf's. We | |
| 562 need to do various special things in this case, since we obviously | |
| 563 don't yet have the configuration files when we're searching for the | |
| 564 configuration files. */ | |
| 565 static bool first_search = true; | |
| 566 | |
| 567 /* This function is called after every search (except the first, since | |
| 568 we definitely want to allow enabling the logging in texmf.cnf) to | |
| 569 record the filename(s) found in $TEXMFLOG. */ | |
| 570 | |
| 571 static void | |
| 4391 | 572 log_search (const string_vector& filenames) |
| 4378 | 573 { |
| 4398 | 574 static FILE *log_file = 0; |
| 4378 | 575 static bool first_time = true; /* Need to open the log file? */ |
| 4391 | 576 |
| 577 if (first_time) | |
| 578 { | |
| 579 first_time = false; | |
| 580 | |
| 581 /* Get name from either envvar or config file. */ | |
| 582 std::string log_name = kpse_var_value ("TEXMFLOG"); | |
| 583 | |
| 584 if (! log_name.empty ()) | |
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585 { |
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586 log_file = xfopen (log_name.c_str (), "a"); |
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587 |
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588 if (! log_file) |
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589 perror (log_name.c_str ()); |
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590 } |
| 4378 | 591 } |
| 4391 | 592 |
| 593 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH) || log_file) | |
| 594 { | |
| 595 /* FILENAMES should never be null, but safety doesn't hurt. */ | |
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596 for (int e = 0; e < filenames.numel () && ! filenames[e].empty (); e++) |
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597 { |
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598 std::string filename = filenames[e]; |
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599 |
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600 /* Only record absolute filenames, for privacy. */ |
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601 if (log_file && kpse_absolute_p (filename.c_str (), false)) |
| 10411 | 602 gnulib::fprintf (log_file, "%lu %s\n", |
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603 static_cast<unsigned long> (time (0)), |
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604 filename.c_str ()); |
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605 |
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606 /* And show them online, if debugging. We've already started |
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607 the debugging line in 'search', where this is called, so |
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608 just print the filename here, don't use DEBUGF. */ |
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609 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 10411 | 610 gnulib::fputs (filename.c_str (), stderr); |
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611 } |
| 4378 | 612 } |
| 613 } | |
| 4392 | 614 |
| 4378 | 615 /* Concatenate each element in DIRS with NAME (assume each ends with a |
| 616 /, to save time). If SEARCH_ALL is false, return the first readable | |
| 617 regular file. Else continue to search for more. In any case, if | |
| 618 none, return a list containing just NULL. | |
| 619 | |
| 620 We keep a single buffer for the potential filenames and reallocate | |
| 621 only when necessary. I'm not sure it's noticeably faster, but it | |
| 622 does seem cleaner. (We do waste a bit of space in the return | |
| 623 value, though, since we don't shrink it to the final size returned.) */ | |
| 624 | |
| 4390 | 625 static string_vector |
| 626 dir_list_search (str_llist_type *dirs, const std::string& name, | |
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627 bool search_all) |
| 4378 | 628 { |
| 629 str_llist_elt_type *elt; | |
| 4390 | 630 string_vector ret; |
| 4378 | 631 |
| 632 for (elt = *dirs; elt; elt = STR_LLIST_NEXT (*elt)) | |
| 633 { | |
| 4390 | 634 const std::string dir = STR_LLIST (*elt); |
| 4393 | 635 |
| 636 std::string potential = dir + name; | |
| 637 | |
| 638 std::string tmp = kpse_readable_file (potential); | |
| 639 | |
| 640 if (! tmp.empty ()) | |
| 4378 | 641 { |
| 4393 | 642 ret.append (potential); |
| 4391 | 643 |
| 4378 | 644 /* Move this element towards the top of the list. */ |
| 645 str_llist_float (dirs, elt); | |
| 4391 | 646 |
| 647 if (! search_all) | |
| 4378 | 648 return ret; |
| 649 } | |
| 650 } | |
| 4391 | 651 |
| 4378 | 652 return ret; |
| 653 } | |
| 4392 | 654 |
| 4378 | 655 /* This is called when NAME is absolute or explicitly relative; if it's |
| 656 readable, return (a list containing) it; otherwise, return NULL. */ | |
| 657 | |
| 4390 | 658 static string_vector |
| 4393 | 659 absolute_search (const std::string& name) |
| 4378 | 660 { |
| 4390 | 661 string_vector ret_list; |
| 4393 | 662 std::string found = kpse_readable_file (name); |
| 4391 | 663 |
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664 /* Add 'found' to the return list even if it's null; that tells |
| 4378 | 665 the caller we didn't find anything. */ |
| 4394 | 666 ret_list.append (found); |
| 4391 | 667 |
| 4378 | 668 return ret_list; |
| 669 } | |
| 4392 | 670 |
| 4378 | 671 /* This is the hard case -- look for NAME in PATH. If ALL is false, |
| 672 return the first file found. Otherwise, search all elements of PATH. */ | |
| 673 | |
| 4390 | 674 static string_vector |
| 4394 | 675 path_search (const std::string& path, const std::string& name, |
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676 bool /* must_exist */, bool all) |
| 4378 | 677 { |
| 4390 | 678 string_vector ret_list; |
| 4378 | 679 bool done = false; |
| 4390 | 680 |
| 8021 | 681 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4390 | 682 { |
| 4394 | 683 std::string elt = *pi; |
| 684 | |
| 4390 | 685 string_vector found; |
| 686 | |
| 687 /* Do not touch the device if present */ | |
| 688 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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689 { |
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690 while (elt.length () > 3 |
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691 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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692 { |
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693 elt[2] = elt[1]; |
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694 elt[1] = elt[0]; |
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695 elt = elt.substr (1); |
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696 } |
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697 } |
| 4390 | 698 else |
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699 { |
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700 /* We never want to search the whole disk. */ |
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701 while (elt.length () > 1 |
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702 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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703 elt = elt.substr (1); |
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704 } |
| 4391 | 705 |
| 4390 | 706 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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707 (search), also tests first_search, and does the resetting. */ |
| 21865 | 708 if (first_search) |
| 709 found = string_vector (); | |
| 710 | |
| 711 /* Search the filesystem. */ | |
| 712 | |
| 713 if (found.empty ()) | |
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714 { |
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715 str_llist_type *dirs = kpse_element_dirs (elt); |
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716 |
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717 if (dirs && *dirs) |
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718 found = dir_list_search (dirs, name, all); |
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719 } |
| 4390 | 720 |
| 721 /* Did we find anything anywhere? */ | |
| 722 if (! found.empty ()) | |
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723 { |
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724 if (all) |
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725 ret_list.append (found); |
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726 else |
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727 { |
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728 ret_list.append (found[0]); |
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729 done = true; |
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730 } |
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731 } |
| 4378 | 732 } |
| 733 | |
| 734 return ret_list; | |
| 4390 | 735 } |
| 4392 | 736 |
| 4378 | 737 /* Search PATH for ORIGINAL_NAME. If ALL is false, or ORIGINAL_NAME is |
| 738 absolute_p, check ORIGINAL_NAME itself. Otherwise, look at each | |
| 739 element of PATH for the first readable ORIGINAL_NAME. | |
| 4391 | 740 |
| 4378 | 741 Always return a list; if no files are found, the list will |
| 742 contain just NULL. If ALL is true, the list will be | |
| 743 terminated with NULL. */ | |
| 744 | |
| 4390 | 745 static string_vector |
| 746 search (const std::string& path, const std::string& original_name, | |
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747 bool must_exist, bool all) |
| 4378 | 748 { |
| 4390 | 749 string_vector ret_list; |
| 4378 | 750 bool absolute_p; |
| 751 | |
| 752 /* Make a leading ~ count as an absolute filename, and expand $FOO's. */ | |
| 4390 | 753 std::string name = kpse_expand (original_name); |
| 4391 | 754 |
| 4378 | 755 /* If the first name is absolute or explicitly relative, no need to |
| 756 consider PATH at all. */ | |
| 757 absolute_p = kpse_absolute_p (name, true); | |
| 4391 | 758 |
| 4378 | 759 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) |
| 4391 | 760 DEBUGF4 ("start search (file=%s, must_exist=%d, find_all=%d, path=%s).\n", |
| 4390 | 761 name.c_str (), must_exist, all, path.c_str ()); |
| 4378 | 762 |
| 763 /* Find the file(s). */ | |
| 764 ret_list = absolute_p ? absolute_search (name) | |
| 765 : path_search (path, name, must_exist, all); | |
| 4391 | 766 |
| 4378 | 767 /* The very first search is for texmf.cnf. We can't log that, since |
| 768 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 769 if (first_search) |
| 770 { | |
| 771 first_search = false; | |
| 772 } | |
| 773 else | |
| 774 { | |
| 775 /* Record the filenames we found, if desired. And wrap them in a | |
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776 debugging line if we're doing that. */ |
| 4391 | 777 |
| 778 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
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779 DEBUGF1 ("search (%s) =>", original_name.c_str ()); |
| 4391 | 780 |
| 781 log_search (ret_list); | |
| 782 | |
| 783 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 784 gnulib::putc ('\n', stderr); |
| 4391 | 785 } |
| 4378 | 786 |
| 4390 | 787 return ret_list; |
| 4378 | 788 } |
| 4392 | 789 |
| 4378 | 790 /* Search PATH for the first NAME. */ |
| 791 | |
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792 /* Call 'kpse_expand' on NAME. If the result is an absolute or |
| 4399 | 793 explicitly relative filename, check whether it is a readable |
| 794 (regular) file. | |
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795 |
| 4399 | 796 Otherwise, look in each of the directories specified in PATH (also do |
| 21865 | 797 tilde and variable expansion on elements in PATH). |
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798 |
|
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799 The caller must expand PATH. This is because it makes more sense to |
| 4399 | 800 do this once, in advance, instead of for every search using it. |
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801 |
| 4399 | 802 In any case, return the complete filename if found, otherwise NULL. */ |
| 803 | |
| 804 static std::string | |
| 4390 | 805 kpse_path_search (const std::string& path, const std::string& name, |
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806 bool must_exist) |
| 4378 | 807 { |
| 4390 | 808 string_vector ret_list = search (path, name, must_exist, false); |
| 809 | |
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810 return ret_list.empty () ? "" : ret_list[0]; |
| 4378 | 811 } |
| 812 | |
| 813 /* Search all elements of PATH for files named NAME. Not sure if it's | |
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814 right to assert 'must_exist' here, but it suffices now. */ |
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815 |
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816 /* Like 'kpse_path_search' with MUST_EXIST true, but return a list of |
| 4399 | 817 all the filenames (or NULL if none), instead of taking the first. */ |
| 818 | |
| 819 static string_vector | |
| 4390 | 820 kpse_all_path_search (const std::string& path, const std::string& name) |
| 4378 | 821 { |
| 4390 | 822 return search (path, name, true, true); |
| 4378 | 823 } |
| 4392 | 824 |
| 4378 | 825 /* This is the hard case -- look in each element of PATH for each |
| 826 element of NAMES. If ALL is false, return the first file found. | |
| 827 Otherwise, search all elements of PATH. */ | |
| 828 | |
| 4390 | 829 static string_vector |
| 4394 | 830 path_find_first_of (const std::string& path, const string_vector& names, |
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831 bool /* must_exist */, bool all) |
| 4378 | 832 { |
| 4390 | 833 string_vector ret_list; |
| 4378 | 834 bool done = false; |
| 4390 | 835 |
| 8021 | 836 for (kpse_path_iterator pi (path); ! done && pi != std::string::npos; pi++) |
| 4378 | 837 { |
| 4394 | 838 std::string elt = *pi; |
| 839 | |
| 4378 | 840 str_llist_type *dirs; |
| 841 str_llist_elt_type *dirs_elt; | |
| 4390 | 842 string_vector found; |
| 4378 | 843 |
| 844 /* Do not touch the device if present */ | |
| 845 | |
| 846 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
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847 { |
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848 while (elt.length () > 3 |
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849 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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850 { |
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851 elt[2] = elt[1]; |
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852 elt[1] = elt[0]; |
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853 elt = elt.substr (1); |
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854 } |
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855 } |
| 4378 | 856 else |
|
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857 { |
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858 /* We never want to search the whole disk. */ |
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859 while (elt.length () > 1 |
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860 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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861 elt = elt.substr (1); |
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862 } |
| 4378 | 863 |
| 864 /* We have to search one directory at a time. */ | |
| 865 dirs = kpse_element_dirs (elt); | |
| 866 for (dirs_elt = *dirs; dirs_elt; dirs_elt = STR_LLIST_NEXT (*dirs_elt)) | |
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867 { |
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868 const std::string dir = STR_LLIST (*dirs_elt); |
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869 |
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870 int len = names.numel (); |
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871 for (int i = 0; i < len && ! done; i++) |
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872 { |
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873 std::string name = names[i]; |
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874 |
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875 /* Try ls-R, unless we're searching for texmf.cnf. Our caller |
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876 (find_first_of), also tests first_search, and does the |
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877 resetting. */ |
| 21865 | 878 if (first_search) |
| 879 found = string_vector (); | |
| 880 | |
| 881 /* Search the filesystem. */ | |
| 882 | |
| 883 if (found.empty ()) | |
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884 { |
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885 static str_llist_type *tmp = 0; |
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886 |
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887 if (! tmp) |
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888 { |
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889 tmp = new str_llist_type; |
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890 *tmp = 0; |
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891 str_llist_add (tmp, ""); |
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892 } |
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893 |
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894 STR_LLIST (*(*tmp)) = dir; |
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895 |
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896 found = dir_list_search (tmp, name, all); |
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897 } |
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898 |
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899 /* Did we find anything anywhere? */ |
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900 if (! found.empty ()) |
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901 { |
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902 if (all) |
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903 ret_list.append (found); |
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904 else |
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905 { |
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906 ret_list.append (found[0]); |
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907 done = true; |
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908 } |
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909 } |
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910 } |
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911 } |
| 4378 | 912 } |
| 913 | |
| 914 return ret_list; | |
| 4391 | 915 } |
| 4378 | 916 |
| 4390 | 917 static string_vector |
| 918 find_first_of (const std::string& path, const string_vector& names, | |
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919 bool must_exist, bool all) |
| 4378 | 920 { |
| 4390 | 921 string_vector ret_list; |
| 4378 | 922 |
| 923 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 924 { | |
| 10411 | 925 gnulib::fputs ("start find_first_of ((", stderr); |
| 4391 | 926 |
|
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927 int len = names.numel (); |
| 4391 | 928 |
| 4390 | 929 for (int i = 0; i < len; i++) |
|
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930 { |
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931 if (i == 0) |
| 10411 | 932 gnulib::fputs (names[i].c_str (), stderr); |
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933 else |
| 10411 | 934 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
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935 } |
| 4391 | 936 |
| 10411 | 937 gnulib::fprintf (stderr, "), path=%s, must_exist=%d).\n", |
| 938 path.c_str (), must_exist); | |
| 4378 | 939 } |
| 940 | |
|
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941 for (int i = 0; i < names.numel (); i++) |
| 4409 | 942 { |
| 943 std::string name = names[i]; | |
| 944 | |
| 945 if (kpse_absolute_p (name, true)) | |
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946 { |
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947 /* If the name is absolute or explicitly relative, no need |
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948 to consider PATH at all. If we find something, then we |
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949 are done. */ |
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950 |
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951 ret_list = absolute_search (name); |
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952 |
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953 if (! ret_list.empty ()) |
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954 return ret_list; |
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955 } |
| 4409 | 956 } |
| 957 | |
| 4378 | 958 /* Find the file. */ |
| 959 ret_list = path_find_first_of (path, names, must_exist, all); | |
| 960 | |
| 961 /* The very first search is for texmf.cnf. We can't log that, since | |
| 962 we want to allow setting TEXMFLOG in texmf.cnf. */ | |
| 4391 | 963 if (first_search) |
| 964 { | |
| 965 first_search = false; | |
| 966 } | |
| 967 else | |
| 968 { | |
| 969 /* Record the filenames we found, if desired. And wrap them in a | |
|
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970 debugging line if we're doing that. */ |
| 4391 | 971 |
| 972 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
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973 { |
| 10411 | 974 gnulib::fputs ("find_first_of (", stderr); |
|
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975 |
|
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976 int len = names.numel (); |
|
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977 |
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978 for (int i = 0; i < len; i++) |
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979 { |
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980 if (i == 0) |
| 10411 | 981 gnulib::fputs (names[i].c_str (), stderr); |
|
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982 else |
| 10411 | 983 gnulib::fprintf (stderr, ", %s", names[i].c_str ()); |
|
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984 } |
| 10411 | 985 |
| 986 gnulib::fputs (") =>", stderr); | |
|
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987 } |
| 4391 | 988 |
| 989 log_search (ret_list); | |
| 990 | |
| 991 if (KPSE_DEBUG_P (KPSE_DEBUG_SEARCH)) | |
| 10411 | 992 gnulib::putc ('\n', stderr); |
| 4391 | 993 } |
| 4378 | 994 |
| 4390 | 995 return ret_list; |
| 4378 | 996 } |
| 997 | |
| 998 /* Search each element of PATH for each element of NAMES. Return the | |
| 999 first one found. */ | |
| 1000 | |
| 4399 | 1001 /* Search each element of PATH for each element in the list of NAMES. |
| 1002 Return the first one found. */ | |
| 1003 | |
| 1004 static std::string | |
| 4390 | 1005 kpse_path_find_first_of (const std::string& path, const string_vector& names, |
|
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1006 bool must_exist) |
| 4378 | 1007 { |
| 4390 | 1008 string_vector ret_list = find_first_of (path, names, must_exist, false); |
| 1009 | |
|
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1010 return ret_list.empty () ? "" : ret_list[0]; |
| 4378 | 1011 } |
| 1012 | |
| 1013 /* Search each element of PATH for each element of NAMES and return a | |
| 1014 list containing everything found, in the order found. */ | |
| 1015 | |
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1016 /* Like 'kpse_path_find_first_of' with MUST_EXIST true, but return a |
| 4399 | 1017 list of all the filenames (or NULL if none), instead of taking the |
| 1018 first. */ | |
| 1019 | |
| 1020 static string_vector | |
| 4390 | 1021 kpse_all_path_find_first_of (const std::string& path, |
|
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1022 const string_vector& names) |
| 4378 | 1023 { |
| 4390 | 1024 return find_first_of (path, names, true, true); |
| 4378 | 1025 } |
| 1026 | |
| 4399 | 1027 /* General expansion. Some of this file (the brace-expansion |
| 4378 | 1028 code from bash) is covered by the GPL; this is the only GPL-covered |
| 1029 code in kpathsea. The part of the file that I wrote (the first | |
| 1030 couple of functions) is covered by the LGPL. */ | |
| 1031 | |
| 1032 /* If NAME has a leading ~ or ~user, Unix-style, expand it to the user's | |
| 1033 home directory, and return a new malloced string. If no ~, or no | |
| 1034 <pwd.h>, just return NAME. */ | |
| 1035 | |
| 4389 | 1036 static std::string |
| 1037 kpse_tilde_expand (const std::string& name) | |
| 4378 | 1038 { |
| 4389 | 1039 std::string expansion; |
| 4391 | 1040 |
| 4378 | 1041 /* If no leading tilde, do nothing. */ |
| 5137 | 1042 if (name.empty () || name[0] != '~') |
| 4391 | 1043 { |
| 1044 expansion = name; | |
| 1045 | |
|
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1046 /* If a bare tilde, return the home directory or '.'. (Very |
|
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1047 unlikely that the directory name will do anyone any good, but |
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1048 ... */ |
| 4391 | 1049 } |
| 1050 else if (name.length () == 1) | |
| 1051 { | |
|
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1052 expansion = octave::sys::env::get_home_directory (); |
| 4391 | 1053 |
| 1054 if (expansion.empty ()) | |
|
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1055 expansion = "."; |
| 4391 | 1056 |
|
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1057 /* If '~/', remove any trailing / or replace leading // in $HOME. |
|
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1058 Should really check for doubled intermediate slashes, too. */ |
| 4378 | 1059 } |
| 4391 | 1060 else if (IS_DIR_SEP (name[1])) |
| 1061 { | |
| 1062 unsigned c = 1; | |
|
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1063 std::string home = octave::sys::env::get_home_directory (); |
| 4391 | 1064 |
| 1065 if (home.empty ()) | |
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1066 home = "."; |
| 4391 | 1067 |
| 1068 size_t home_len = home.length (); | |
| 1069 | |
| 1070 /* handle leading // */ | |
| 1071 if (home_len > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
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1072 home = home.substr (1); |
| 4391 | 1073 |
| 1074 /* omit / after ~ */ | |
| 1075 if (IS_DIR_SEP (home[home_len - 1])) | |
|
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1076 c++; |
| 4391 | 1077 |
| 1078 expansion = home + name.substr (c); | |
| 1079 | |
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1080 /* If '~user' or '~user/', look up user in the passwd database (but |
|
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1081 OS/2 doesn't have this concept. */ |
| 4378 | 1082 } |
| 4391 | 1083 else |
|
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1084 #if defined (HAVE_PWD_H) |
| 4378 | 1085 { |
| 1086 unsigned c = 2; | |
| 4391 | 1087 |
| 1088 /* find user name */ | |
| 1089 while (name.length () > c && ! IS_DIR_SEP (name[c])) | |
| 4378 | 1090 c++; |
| 4391 | 1091 |
| 1092 std::string user = name.substr (1, c-1); | |
| 1093 | |
| 4378 | 1094 /* We only need the cast here for (deficient) systems |
|
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1095 which do not declare 'getpwnam' in <pwd.h>. */ |
|
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1096 octave::sys::password p = octave::sys::password::getpwnam (user); |
| 4378 | 1097 |
|
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1098 /* If no such user, just use '.'. */ |
| 4391 | 1099 std::string home = p ? p.dir () : std::string ("."); |
| 1100 | |
| 1101 if (home.empty ()) | |
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1102 home = "."; |
| 4391 | 1103 |
| 1104 /* handle leading // */ | |
| 1105 if (home.length () > 1 && IS_DIR_SEP (home[0]) && IS_DIR_SEP (home[1])) | |
| 1106 home = home.substr (1); | |
| 1107 | |
| 1108 /* If HOME ends in /, omit the / after ~user. */ | |
| 1109 if (name.length () > c && IS_DIR_SEP (home[home.length () - 1])) | |
| 1110 c++; | |
| 1111 | |
| 1112 expansion = name.length () > c ? home : home + name.substr (c); | |
| 4378 | 1113 } |
| 1114 #else /* not HAVE_PWD_H */ | |
| 4391 | 1115 expansion = name; |
| 4378 | 1116 #endif /* not HAVE_PWD_H */ |
| 1117 | |
| 4389 | 1118 return expansion; |
| 4378 | 1119 } |
| 1120 | |
| 1121 /* Do variable expansion first so ~${USER} works. (Besides, it's what the | |
| 1122 shells do.) */ | |
| 1123 | |
| 4399 | 1124 /* Call kpse_var_expand and kpse_tilde_expand (in that order). Result |
| 1125 is always in fresh memory, even if no expansions were done. */ | |
| 1126 | |
| 1127 static std::string | |
| 4389 | 1128 kpse_expand (const std::string& s) |
| 4378 | 1129 { |
| 4389 | 1130 std::string var_expansion = kpse_var_expand (s); |
| 1131 return kpse_tilde_expand (var_expansion); | |
| 4378 | 1132 } |
| 1133 | |
| 1134 /* Forward declarations of functions from the original expand.c */ | |
| 4397 | 1135 static string_vector brace_expand (const std::string&); |
| 4378 | 1136 |
| 1137 /* If $KPSE_DOT is defined in the environment, prepend it to any relative | |
| 1138 path components. */ | |
| 1139 | |
| 4389 | 1140 static std::string |
| 1141 kpse_expand_kpse_dot (const std::string& path) | |
| 4378 | 1142 { |
| 4389 | 1143 std::string ret; |
|
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1144 std::string kpse_dot = octave::sys::env::getenv ("KPSE_DOT"); |
| 4391 | 1145 |
| 1146 if (kpse_dot.empty ()) | |
| 4378 | 1147 return path; |
| 1148 | |
| 8021 | 1149 for (kpse_path_iterator pi (path); pi != std::string::npos; pi++) |
| 4391 | 1150 { |
| 4394 | 1151 std::string elt = *pi; |
| 1152 | |
| 4391 | 1153 /* We assume that the !! magic is only used on absolute components. |
|
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1154 Single "." get special treatment, as does "./" or its equivalent. */ |
| 4391 | 1155 |
| 4394 | 1156 size_t elt_len = elt.length (); |
| 1157 | |
| 1158 if (kpse_absolute_p (elt, false) | |
|
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1159 || (elt_len > 1 && elt[0] == '!' && elt[1] == '!')) |
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1160 ret += elt + ENV_SEP_STRING; |
| 4394 | 1161 else if (elt_len == 1 && elt[0] == '.') |
|
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1162 ret += kpse_dot + ENV_SEP_STRING; |
| 4394 | 1163 else if (elt_len > 1 && elt[0] == '.' && IS_DIR_SEP (elt[1])) |
|
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1164 ret += kpse_dot + elt.substr (1) + ENV_SEP_STRING; |
| 4391 | 1165 else |
|
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1166 ret += kpse_dot + DIR_SEP_STRING + elt + ENV_SEP_STRING; |
| 4378 | 1167 } |
| 1168 | |
| 4389 | 1169 int len = ret.length (); |
| 1170 if (len > 0) | |
| 4395 | 1171 ret.resize (len-1); |
| 4389 | 1172 |
| 4378 | 1173 return ret; |
| 1174 } | |
| 1175 | |
| 1176 /* Do brace expansion on ELT; then do variable and ~ expansion on each | |
| 1177 element of the result; then do brace expansion again, in case a | |
| 1178 variable definition contained braces (e.g., $TEXMF). Return a | |
| 1179 string comprising all of the results separated by ENV_SEP_STRING. */ | |
| 1180 | |
| 4389 | 1181 static std::string |
| 4394 | 1182 kpse_brace_expand_element (const std::string& elt) |
| 4378 | 1183 { |
| 4389 | 1184 std::string ret; |
| 4378 | 1185 |
| 4397 | 1186 string_vector expansions = brace_expand (elt); |
| 1187 | |
|
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|
1188 for (int i = 0; i < expansions.numel (); i++) |
| 4391 | 1189 { |
| 1190 /* Do $ and ~ expansion on each element. */ | |
| 1191 std::string x = kpse_expand (expansions[i]); | |
| 1192 | |
| 1193 if (x != expansions[i]) | |
|
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1194 { |
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1195 /* If we did any expansions, do brace expansion again. Since |
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1196 recursive variable definitions are not allowed, this recursion |
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1197 must terminate. (In practice, it's unlikely there will ever be |
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1198 more than one level of recursion.) */ |
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1199 x = kpse_brace_expand_element (x); |
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1200 } |
| 4391 | 1201 |
| 1202 ret += x + ENV_SEP_STRING; | |
| 4378 | 1203 } |
| 1204 | |
| 4389 | 1205 ret.resize (ret.length () - 1); |
| 4391 | 1206 |
| 4378 | 1207 return ret; |
| 1208 } | |
| 1209 | |
|
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1210 /* Do brace expansion and call 'kpse_expand' on each element of the |
| 4399 | 1211 result; return the final expansion (always in fresh memory, even if |
|
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1212 no expansions were done). We don't call 'kpse_expand_default' |
| 4399 | 1213 because there is a whole sequence of defaults to run through; see |
|
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|
1214 'kpse_init_format'. */ |
| 4399 | 1215 |
| 1216 static std::string | |
| 4397 | 1217 kpse_brace_expand (const std::string& path) |
| 4378 | 1218 { |
| 1219 /* Must do variable expansion first because if we have | |
| 1220 foo = .:~ | |
| 1221 TEXINPUTS = $foo | |
| 1222 we want to end up with TEXINPUTS = .:/home/karl. | |
| 1223 Since kpse_path_element is not reentrant, we must get all | |
| 1224 the path elements before we start the loop. */ | |
| 4389 | 1225 std::string tmp = kpse_var_expand (path); |
| 4394 | 1226 |
| 4389 | 1227 std::string ret; |
| 4378 | 1228 |
| 8021 | 1229 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1230 { |
| 4394 | 1231 std::string elt = *pi; |
| 1232 | |
| 4391 | 1233 /* Do brace expansion first, so tilde expansion happens in {~ka,~kb}. */ |
| 1234 std::string expansion = kpse_brace_expand_element (elt); | |
| 1235 ret += expansion + ENV_SEP_STRING; | |
| 1236 } | |
| 4378 | 1237 |
| 4394 | 1238 size_t len = ret.length (); |
| 4389 | 1239 if (len > 0) |
| 4395 | 1240 ret.resize (len-1); |
| 4389 | 1241 |
| 1242 return kpse_expand_kpse_dot (ret); | |
| 4378 | 1243 } |
| 4392 | 1244 |
| 4378 | 1245 /* Expand all special constructs in a path, and include only the actually |
| 1246 existing directories in the result. */ | |
| 4399 | 1247 |
|
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1248 /* Do brace expansion and call 'kpse_expand' on each argument of the |
|
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1249 result, then expand any '//' constructs. The final expansion (always |
| 4399 | 1250 in fresh memory) is a path of all the existing directories that match |
| 1251 the pattern. */ | |
| 1252 | |
| 1253 static std::string | |
| 4397 | 1254 kpse_path_expand (const std::string& path) |
| 4378 | 1255 { |
| 4392 | 1256 std::string ret; |
| 4378 | 1257 unsigned len; |
| 1258 | |
| 1259 len = 0; | |
| 4391 | 1260 |
| 4378 | 1261 /* Expand variables and braces first. */ |
| 4389 | 1262 std::string tmp = kpse_brace_expand (path); |
| 4392 | 1263 |
| 4378 | 1264 /* Now expand each of the path elements, printing the results */ |
| 8021 | 1265 for (kpse_path_iterator pi (tmp); pi != std::string::npos; pi++) |
| 4391 | 1266 { |
| 4394 | 1267 std::string elt = *pi; |
| 1268 | |
| 4391 | 1269 str_llist_type *dirs; |
| 1270 | |
| 1271 /* Skip and ignore magic leading chars. */ | |
| 4394 | 1272 if (elt.length () > 1 && elt[0] == '!' && elt[1] == '!') |
|
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1273 elt = elt.substr (2); |
| 4391 | 1274 |
| 1275 /* Do not touch the device if present */ | |
| 1276 if (NAME_BEGINS_WITH_DEVICE (elt)) | |
|
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1277 { |
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1278 while (elt.length () > 3 |
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1279 && IS_DIR_SEP (elt[2]) && IS_DIR_SEP (elt[3])) |
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1280 { |
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1281 elt[2] = elt[1]; |
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1282 elt[1] = elt[0]; |
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1283 elt = elt.substr (1); |
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1284 } |
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1285 } |
| 4391 | 1286 else |
|
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1287 { |
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1288 /* We never want to search the whole disk. */ |
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1289 while (elt.length () > 1 |
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1290 && IS_DIR_SEP (elt[0]) && IS_DIR_SEP (elt[1])) |
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1291 elt = elt.substr (1); |
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1292 } |
| 4378 | 1293 |
| 4394 | 1294 /* Search the disk for all dirs in the component specified. |
|
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1295 Be faster to check the database, but this is more reliable. */ |
| 4394 | 1296 dirs = kpse_element_dirs (elt); |
| 1297 | |
| 1298 if (dirs && *dirs) | |
|
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1299 { |
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1300 str_llist_elt_type *dir; |
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1301 |
|
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1302 for (dir = *dirs; dir; dir = STR_LLIST_NEXT (*dir)) |
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1303 { |
|
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1304 const std::string thedir = STR_LLIST (*dir); |
|
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1305 unsigned dirlen = thedir.length (); |
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1306 |
|
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1307 ret += thedir; |
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1308 len += dirlen; |
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1309 |
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1310 /* Retain trailing slash if that's the root directory. */ |
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1311 if (dirlen == 1 |
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1312 || (dirlen == 3 && NAME_BEGINS_WITH_DEVICE (thedir) |
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1313 && IS_DIR_SEP (thedir[2]))) |
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1314 { |
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1315 ret += ENV_SEP_STRING; |
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1316 len++; |
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1317 } |
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1318 |
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1319 ret[len-1] = ENV_SEP; |
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1320 } |
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1321 } |
| 4378 | 1322 } |
| 4391 | 1323 |
| 4395 | 1324 if (len > 0) |
| 1325 ret.resize (len-1); | |
| 4391 | 1326 |
| 4378 | 1327 return ret; |
| 1328 } | |
| 4392 | 1329 |
|
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1330 /* braces.c -- code for doing word expansion in curly braces. Taken from |
| 16768 | 1331 bash 1.14.5. [And subsequently modified for kpatshea.] |
| 1332 | |
| 1333 Copyright (C) 1987,1991 Free Software Foundation, Inc. */ | |
| 4378 | 1334 |
| 4391 | 1335 #define brace_whitespace(c) (! (c) || (c) == ' ' || (c) == '\t' || (c) == '\n') |
| 4378 | 1336 |
| 1337 /* Basic idea: | |
| 1338 | |
| 1339 Segregate the text into 3 sections: preamble (stuff before an open brace), | |
| 1340 postamble (stuff after the matching close brace) and amble (stuff after | |
| 1341 preamble, and before postamble). Expand amble, and then tack on the | |
| 1342 expansions to preamble. Expand postamble, and tack on the expansions to | |
| 4391 | 1343 the result so far. */ |
| 4378 | 1344 |
| 4397 | 1345 /* Return a new array of strings which is the result of appending each |
| 1346 string in ARR2 to each string in ARR1. The resultant array is | |
| 1347 len (arr1) * len (arr2) long. For convenience, ARR1 (and its contents) | |
| 1348 are free ()'ed. ARR1 can be NULL, in that case, a new version of ARR2 | |
| 1349 is returned. */ | |
| 1350 | |
| 1351 static string_vector | |
| 1352 array_concat (const string_vector& arr1, const string_vector& arr2) | |
| 4378 | 1353 { |
| 4397 | 1354 string_vector result; |
| 1355 | |
| 1356 if (arr1.empty ()) | |
| 1357 result = arr2; | |
| 1358 else if (arr2.empty ()) | |
| 1359 result = arr1; | |
| 1360 else | |
| 1361 { | |
|
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1362 int len1 = arr1.numel (); |
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|
1363 int len2 = arr2.numel (); |
| 4397 | 1364 |
| 1365 result = string_vector (len1 * len2); | |
| 1366 | |
| 1367 int k = 0; | |
| 1368 for (int i = 0; i < len2; i++) | |
|
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1369 for (int j = 0; j < len1; j++) |
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1370 result[k++] = arr1[j] + arr2[i]; |
| 4397 | 1371 } |
| 1372 | |
| 1373 return result; | |
| 4378 | 1374 } |
| 1375 | |
| 4397 | 1376 static int brace_gobbler (const std::string&, int&, int); |
| 1377 static string_vector expand_amble (const std::string&); | |
| 4378 | 1378 |
| 1379 /* Return an array of strings; the brace expansion of TEXT. */ | |
| 4397 | 1380 static string_vector |
| 1381 brace_expand (const std::string& text) | |
| 4378 | 1382 { |
| 1383 /* Find the text of the preamble. */ | |
| 4397 | 1384 int i = 0; |
| 1385 int c = brace_gobbler (text, i, '{'); | |
| 1386 | |
| 1387 std::string preamble = text.substr (0, i); | |
| 1388 | |
| 1389 string_vector result = string_vector (preamble); | |
| 1390 | |
| 1391 if (c == '{') | |
| 4378 | 1392 { |
| 4397 | 1393 /* Find the amble. This is the stuff inside this set of braces. */ |
| 1394 int start = ++i; | |
| 1395 c = brace_gobbler (text, i, '}'); | |
| 1396 | |
| 1397 /* What if there isn't a matching close brace? */ | |
| 1398 if (! c) | |
|
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|
1399 { |
|
19410
95c533ed464b
use warning IDs for all warnings in liboctave
John W. Eaton <jwe@octave.org>
parents:
18084
diff
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|
1400 (*current_liboctave_warning_with_id_handler) |
|
95c533ed464b
use warning IDs for all warnings in liboctave
John W. Eaton <jwe@octave.org>
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diff
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|
1401 ("Octave:pathsearch-syntax", |
|
95c533ed464b
use warning IDs for all warnings in liboctave
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1402 "%s: Unmatched {", text.c_str ()); |
|
10314
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|
1403 |
|
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|
1404 result = string_vector (text); |
|
07ebe522dac2
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|
1405 } |
| 4397 | 1406 else |
|
10314
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|
1407 { |
|
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|
1408 std::string amble = text.substr (start, i-start); |
|
07ebe522dac2
untabify liboctave C++ sources
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|
1409 result = array_concat (result, expand_amble (amble)); |
|
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|
1410 |
|
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|
1411 std::string postamble = text.substr (i+1); |
|
07ebe522dac2
untabify liboctave C++ sources
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|
1412 result = array_concat (result, brace_expand (postamble)); |
|
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|
1413 } |
| 4378 | 1414 } |
| 1415 | |
| 4397 | 1416 return result; |
| 4378 | 1417 } |
| 1418 | |
| 4397 | 1419 /* The character which is used to separate arguments. */ |
| 1420 static int brace_arg_separator = ','; | |
| 1421 | |
| 4378 | 1422 /* Expand the text found inside of braces. We simply try to split the |
| 1423 text at BRACE_ARG_SEPARATORs into separate strings. We then brace | |
| 1424 expand each slot which needs it, until there are no more slots which | |
| 1425 need it. */ | |
| 4397 | 1426 static string_vector |
| 1427 expand_amble (const std::string& text) | |
| 4378 | 1428 { |
| 4397 | 1429 string_vector result; |
| 1430 | |
| 1431 size_t text_len = text.length (); | |
| 1432 size_t start; | |
| 1433 int i, c; | |
| 1434 | |
| 1435 for (start = 0, i = 0, c = 1; c && start < text_len; start = ++i) | |
| 4378 | 1436 { |
| 4397 | 1437 int i0 = i; |
| 1438 int c0 = brace_gobbler (text, i0, brace_arg_separator); | |
| 1439 int i1 = i; | |
| 1440 int c1 = brace_gobbler (text, i1, ENV_SEP); | |
| 4378 | 1441 c = c0 | c1; |
| 1442 i = (i0 < i1 ? i0 : i1); | |
| 1443 | |
| 4397 | 1444 std::string tem = text.substr (start, i-start); |
| 1445 | |
| 1446 string_vector partial = brace_expand (tem); | |
| 1447 | |
| 1448 if (result.empty ()) | |
|
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|
1449 result = partial; |
| 4378 | 1450 else |
|
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|
1451 result.append (partial); |
| 4378 | 1452 } |
| 4397 | 1453 |
| 1454 return result; | |
| 4378 | 1455 } |
| 1456 | |
|
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21732
diff
changeset
|
1457 /* Start at INDEX, and skip characters in TEXT. Set INDEX to the |
| 4378 | 1458 index of the character matching SATISFY. This understands about |
| 1459 quoting. Return the character that caused us to stop searching; | |
| 1460 this is either the same as SATISFY, or 0. */ | |
| 1461 static int | |
| 4397 | 1462 brace_gobbler (const std::string& text, int& indx, int satisfy) |
| 4378 | 1463 { |
|
18084
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
1464 int c = 0; |
|
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
1465 int level = 0; |
|
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
1466 int quoted = 0; |
|
8e056300994b
Follow coding convention of defining and initializing only 1 variable per line in liboctave.
Rik <rik@octave.org>
parents:
17769
diff
changeset
|
1467 int pass_next = 0; |
| 4397 | 1468 |
| 1469 size_t text_len = text.length (); | |
| 1470 | |
| 1471 size_t i = indx; | |
| 1472 | |
| 1473 for (; i < text_len; i++) | |
| 4378 | 1474 { |
| 4397 | 1475 c = text[i]; |
| 1476 | |
| 4378 | 1477 if (pass_next) |
|
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|
1478 { |
|
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|
1479 pass_next = 0; |
|
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|
1480 continue; |
|
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|
1481 } |
| 4378 | 1482 |
| 1483 /* A backslash escapes the next character. This allows backslash to | |
|
10314
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|
1484 escape the quote character in a double-quoted string. */ |
| 4378 | 1485 if (c == '\\' && (quoted == 0 || quoted == '"' || quoted == '`')) |
| 1486 { | |
| 1487 pass_next = 1; | |
| 1488 continue; | |
| 1489 } | |
| 1490 | |
| 1491 if (quoted) | |
|
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|
1492 { |
|
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|
1493 if (c == quoted) |
|
07ebe522dac2
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|
1494 quoted = 0; |
|
07ebe522dac2
untabify liboctave C++ sources
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|
1495 continue; |
|
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|
1496 } |
| 4378 | 1497 |
| 1498 if (c == '"' || c == '\'' || c == '`') | |
|
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|
1499 { |
|
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|
1500 quoted = c; |
|
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|
1501 continue; |
|
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diff
changeset
|
1502 } |
| 4391 | 1503 |
|
20955
77f5591878bf
maint: Use '! expr' rather than '!expr' to conform to coding guidelines.
Rik <rik@octave.org>
parents:
20791
diff
changeset
|
1504 if (c == satisfy && ! level && ! quoted) |
|
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|
1505 { |
|
07ebe522dac2
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|
1506 /* We ignore an open brace surrounded by whitespace, and also |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1507 an open brace followed immediately by a close brace, that |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1508 was preceded with whitespace. */ |
|
19864
17d647821d61
maint: More cleanup of C++ code to follow Octave coding conventions.
John W. Eaton <jwe@octave.org>
parents:
19697
diff
changeset
|
1509 if (c == '{' |
|
17d647821d61
maint: More cleanup of C++ code to follow Octave coding conventions.
John W. Eaton <jwe@octave.org>
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diff
changeset
|
1510 && ((i == 0 || brace_whitespace (text[i-1])) |
|
17d647821d61
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John W. Eaton <jwe@octave.org>
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19697
diff
changeset
|
1511 && (i+1 < text_len |
|
17d647821d61
maint: More cleanup of C++ code to follow Octave coding conventions.
John W. Eaton <jwe@octave.org>
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19697
diff
changeset
|
1512 && (brace_whitespace (text[i+1]) || text[i+1] == '}')))) |
|
10314
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changeset
|
1513 continue; |
|
15466
d174210ce1ec
use ' instead of ` in error messages, warnings and most comments
John W. Eaton <jwe@octave.org>
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14155
diff
changeset
|
1514 /* If this is being compiled as part of bash, ignore the '{' |
|
17769
49a5a4be04a1
maint: Use GNU style coding conventions for code in liboctave/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
1515 in a '${ }' construct */ |
|
10314
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|
1516 if ((c != '{') || i == 0 || (text[i-1] != '$')) |
|
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|
1517 break; |
|
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diff
changeset
|
1518 } |
| 4378 | 1519 |
| 1520 if (c == '{') | |
|
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|
1521 level++; |
| 4378 | 1522 else if (c == '}' && level) |
|
10314
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diff
changeset
|
1523 level--; |
| 4378 | 1524 } |
| 1525 | |
| 4397 | 1526 indx = i; |
| 1527 return c; | |
| 4378 | 1528 } |
| 1529 | |
| 1530 /* Return true if FILENAME could be in PATH_ELT, i.e., if the directory | |
| 1531 part of FILENAME matches PATH_ELT. Have to consider // wildcards, but | |
| 1532 $ and ~ expansion have already been done. */ | |
| 4391 | 1533 |
| 4378 | 1534 static bool |
| 4390 | 1535 match (const std::string& filename_arg, const std::string& path_elt_arg) |
| 4378 | 1536 { |
| 4390 | 1537 const char *filename = filename_arg.c_str (); |
| 1538 const char *path_elt = path_elt_arg.c_str (); | |
| 1539 | |
| 4378 | 1540 const char *original_filename = filename; |
| 1541 bool matched = false; | |
| 4391 | 1542 |
| 1543 for (; *filename && *path_elt; filename++, path_elt++) | |
| 1544 { | |
| 4394 | 1545 if (*filename == *path_elt) /* normal character match */ |
|
10314
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changeset
|
1546 ; |
| 4391 | 1547 |
| 1548 else if (IS_DIR_SEP (*path_elt) /* at // */ | |
|
10314
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changeset
|
1549 && original_filename < filename && IS_DIR_SEP (path_elt[-1])) |
|
07ebe522dac2
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|
1550 { |
|
07ebe522dac2
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changeset
|
1551 while (IS_DIR_SEP (*path_elt)) |
|
07ebe522dac2
untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
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changeset
|
1552 path_elt++; /* get past second and any subsequent /'s */ |
|
07ebe522dac2
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|
1553 |
|
07ebe522dac2
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changeset
|
1554 if (*path_elt == 0) |
|
07ebe522dac2
untabify liboctave C++ sources
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diff
changeset
|
1555 { |
|
21751
b571fc85953f
maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents:
21732
diff
changeset
|
1556 /* Trailing //, matches anything. We could make this |
|
10314
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changeset
|
1557 part of the other case, but it seems pointless to do |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1558 the extra work. */ |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1559 matched = true; |
|
07ebe522dac2
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changeset
|
1560 break; |
|
07ebe522dac2
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changeset
|
1561 } |
|
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changeset
|
1562 else |
|
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changeset
|
1563 { |
|
07ebe522dac2
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changeset
|
1564 /* Intermediate //, have to match rest of PATH_ELT. */ |
|
20955
77f5591878bf
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Rik <rik@octave.org>
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20791
diff
changeset
|
1565 for (; ! matched && *filename; filename++) |
|
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|
1566 { |
|
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|
1567 /* Try matching at each possible character. */ |
|
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untabify liboctave C++ sources
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|
1568 if (IS_DIR_SEP (filename[-1]) && *filename == *path_elt) |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1569 matched = match (filename, path_elt); |
|
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changeset
|
1570 } |
|
07ebe522dac2
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changeset
|
1571 |
|
07ebe522dac2
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changeset
|
1572 /* Prevent filename++ when *filename='\0'. */ |
|
07ebe522dac2
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changeset
|
1573 break; |
|
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changeset
|
1574 } |
|
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changeset
|
1575 } |
| 4391 | 1576 else |
|
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|
1577 /* normal character nonmatch, quit */ |
|
07ebe522dac2
untabify liboctave C++ sources
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changeset
|
1578 break; |
| 4378 | 1579 } |
| 1580 | |
| 1581 /* If we've reached the end of PATH_ELT, check that we're at the last | |
| 1582 component of FILENAME, we've matched. */ | |
| 4391 | 1583 if (! matched && *path_elt == 0) |
| 1584 { | |
|
15466
d174210ce1ec
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|
1585 /* Probably PATH_ELT ended with 'vf' or some such, and FILENAME |
|
d174210ce1ec
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|
1586 ends with 'vf/ptmr.vf'. In that case, we'll be at a |
|
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|
1587 directory separator. On the other hand, if PATH_ELT ended |
|
15466
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changeset
|
1588 with a / (as in 'vf/'), FILENAME being the same 'vf/ptmr.vf', |
|
d174210ce1ec
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changeset
|
1589 we'll be at the 'p'. Upshot: if we're at a dir separator in |
|
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|
1590 FILENAME, skip it. But if not, that's ok, as long as there |
|
07ebe522dac2
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|
1591 are no more dir separators. */ |
| 4391 | 1592 |
| 1593 if (IS_DIR_SEP (*filename)) | |
|
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|
1594 filename++; |
| 4391 | 1595 |
|
20955
77f5591878bf
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1596 while (*filename && ! IS_DIR_SEP (*filename)) |
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1597 filename++; |
| 4391 | 1598 |
| 1599 matched = *filename == 0; | |
| 1600 } | |
| 1601 | |
| 4378 | 1602 return matched; |
| 1603 } | |
| 1604 | |
| 4399 | 1605 /* Expand extra colons. */ |
| 4378 | 1606 |
| 1607 /* Check for leading colon first, then trailing, then doubled, since | |
| 1608 that is fastest. Usually it will be leading or trailing. */ | |
| 1609 | |
| 4399 | 1610 /* Replace a leading or trailing or doubled : in PATH with DFLT. If |
| 1611 no extra colons, return PATH. Only one extra colon is replaced. | |
| 1612 DFLT may not be NULL. */ | |
| 1613 | |
| 1614 static std::string | |
| 4394 | 1615 kpse_expand_default (const std::string& path, const std::string& fallback) |
| 4378 | 1616 { |
| 4394 | 1617 std::string expansion; |
| 1618 | |
| 1619 size_t path_len = path.length (); | |
| 1620 | |
| 1621 if (path_len == 0) | |
| 1622 expansion = fallback; | |
| 4378 | 1623 |
| 1624 /* Solitary or leading :? */ | |
| 4394 | 1625 else if (IS_ENV_SEP (path[0])) |
| 4378 | 1626 { |
| 4394 | 1627 expansion = path_len == 1 ? fallback : fallback + path; |
| 4378 | 1628 } |
| 1629 | |
| 1630 /* Sorry about the assignment in the middle of the expression, but | |
| 1631 conventions were made to be flouted and all that. I don't see the | |
| 1632 point of calling strlen twice or complicating the logic just to | |
| 1633 avoid the assignment (especially now that I've pointed it out at | |
| 1634 such great length). */ | |
| 4394 | 1635 else if (IS_ENV_SEP (path[path_len-1])) |
| 1636 expansion = path + fallback; | |
| 4378 | 1637 |
| 1638 /* OK, not leading or trailing. Check for doubled. */ | |
| 1639 else | |
| 1640 { | |
| 1641 /* What we'll return if we find none. */ | |
| 4394 | 1642 expansion = path; |
| 1643 | |
| 1644 for (size_t i = 0; i < path_len; i++) | |
| 4378 | 1645 { |
| 4394 | 1646 if (i + 1 < path_len |
|
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1647 && IS_ENV_SEP (path[i]) && IS_ENV_SEP (path[i+1])) |
| 4394 | 1648 { |
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1649 /* We have a doubled colon. */ |
| 4391 | 1650 |
| 4378 | 1651 /* Copy stuff up to and including the first colon. */ |
| 1652 /* Copy in FALLBACK, and then the rest of PATH. */ | |
|
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1653 expansion = path.substr (0, i+1) + fallback + path.substr (i+1); |
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1654 |
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1655 break; |
| 4378 | 1656 } |
| 1657 } | |
| 1658 } | |
| 4391 | 1659 |
| 4378 | 1660 return expansion; |
| 1661 } | |
| 1662 | |
| 4399 | 1663 /* Translate a path element to its corresponding director{y,ies}. */ |
| 4378 | 1664 |
| 1665 /* To avoid giving prototypes for all the routines and then their real | |
| 1666 definitions, we give all the subroutines first. The entry point is | |
| 1667 the last routine in the file. */ | |
| 4392 | 1668 |
| 4378 | 1669 /* Make a copy of DIR (unless it's null) and save it in L. Ensure that |
| 1670 DIR ends with a DIR_SEP for the benefit of later searches. */ | |
| 1671 | |
| 1672 static void | |
| 4390 | 1673 dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 1674 { |
| 4390 | 1675 char last_char = dir[dir.length () - 1]; |
| 4407 | 1676 |
| 4390 | 1677 std::string saved_dir = dir; |
| 4407 | 1678 |
| 1679 if (! (IS_DIR_SEP (last_char) || IS_DEVICE_SEP (last_char))) | |
| 4390 | 1680 saved_dir += DIR_SEP_STRING; |
| 4391 | 1681 |
| 4378 | 1682 str_llist_add (l, saved_dir); |
| 1683 } | |
| 1684 | |
| 4390 | 1685 /* Return true if FN is a directory or a symlink to a directory, |
| 1686 false if not. */ | |
| 1687 | |
| 1688 static bool | |
| 1689 dir_p (const std::string& fn) | |
| 1690 { | |
| 21865 | 1691 octave::sys::file_stat fs (fn); |
| 1692 | |
| 1693 return (fs && fs.is_dir ()); | |
| 4390 | 1694 } |
| 4391 | 1695 |
| 4378 | 1696 /* If DIR is a directory, add it to the list L. */ |
| 1697 | |
| 1698 static void | |
| 4390 | 1699 checked_dir_list_add (str_llist_type *l, const std::string& dir) |
| 4378 | 1700 { |
| 1701 if (dir_p (dir)) | |
| 1702 dir_list_add (l, dir); | |
| 1703 } | |
| 4392 | 1704 |
| 4378 | 1705 /* The cache. Typically, several paths have the same element; for |
| 1706 example, /usr/local/lib/texmf/fonts//. We don't want to compute the | |
| 1707 expansion of such a thing more than once. Even though we also cache | |
| 1708 the dir_links call, that's not enough -- without this path element | |
| 1709 caching as well, the execution time doubles. */ | |
| 1710 | |
| 4398 | 1711 struct cache_entry |
| 4378 | 1712 { |
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1713 cache_entry (void) : key (), value (0) { } |
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1714 |
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1715 ~cache_entry (void) { } |
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1716 |
| 4398 | 1717 std::string key; |
| 4378 | 1718 str_llist_type *value; |
| 4398 | 1719 }; |
| 1720 | |
| 1721 static cache_entry *the_cache = 0; | |
| 4378 | 1722 static unsigned cache_length = 0; |
| 1723 | |
| 1724 /* Associate KEY with VALUE. We implement the cache as a simple linear | |
| 1725 list, since it's unlikely to ever be more than a dozen or so elements | |
| 1726 long. We don't bother to check here if PATH has already been saved; | |
| 1727 we always add it to our list. We copy KEY but not VALUE; not sure | |
| 1728 that's right, but it seems to be all that's needed. */ | |
| 1729 | |
| 1730 static void | |
| 4398 | 1731 cache (const std::string key, str_llist_type *value) |
| 4378 | 1732 { |
| 4398 | 1733 cache_entry *new_cache = new cache_entry [cache_length+1]; |
| 1734 | |
| 4399 | 1735 for (unsigned i = 0; i < cache_length; i++) |
| 4398 | 1736 { |
| 1737 new_cache[i].key = the_cache[i].key; | |
| 1738 new_cache[i].value = the_cache[i].value; | |
| 1739 } | |
| 1740 | |
| 1741 delete [] the_cache; | |
| 1742 | |
| 1743 the_cache = new_cache; | |
| 1744 | |
| 1745 the_cache[cache_length].key = key; | |
| 1746 the_cache[cache_length].value = value; | |
| 1747 | |
| 4378 | 1748 cache_length++; |
| 1749 } | |
| 1750 | |
| 1751 /* To retrieve, just check the list in order. */ | |
| 1752 | |
| 1753 static str_llist_type * | |
| 4398 | 1754 cached (const std::string& key) |
| 4378 | 1755 { |
| 1756 unsigned p; | |
| 4391 | 1757 |
| 4378 | 1758 for (p = 0; p < cache_length; p++) |
| 1759 { | |
| 4398 | 1760 if (key == the_cache[p].key) |
| 4378 | 1761 return the_cache[p].value; |
| 1762 } | |
| 4391 | 1763 |
| 4398 | 1764 return 0; |
| 4378 | 1765 } |
| 4392 | 1766 |
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1767 #if defined (WIN32) |
| 4398 | 1768 |
| 4378 | 1769 /* Shared across recursive calls, it acts like a stack. */ |
| 4398 | 1770 static std::string dirname; |
| 1771 | |
| 1772 #else /* WIN32 */ | |
| 1773 | |
| 1774 /* Return -1 if FN isn't a directory, else its number of links. | |
| 1775 Duplicate the call to stat; no need to incur overhead of a function | |
| 1776 call for that little bit of cleanliness. */ | |
| 1777 | |
| 1778 static int | |
| 1779 dir_links (const std::string& fn) | |
| 1780 { | |
| 21865 | 1781 int retval; |
| 1782 | |
| 1783 octave::sys::file_stat fs (fn); | |
| 1784 | |
| 1785 retval = fs && (fs.is_dir () ? fs.nlink () : -1); | |
| 4398 | 1786 |
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1787 #if defined (KPSE_DEBUG) |
| 21865 | 1788 if (KPSE_DEBUG_P (KPSE_DEBUG_STAT)) |
| 1789 DEBUGF2 ("dir_links (%s) => %ld\n", fn.c_str (), retval); | |
| 4378 | 1790 #endif |
| 21865 | 1791 |
| 1792 return retval; | |
| 4398 | 1793 } |
| 1794 | |
| 1795 #endif /* WIN32 */ | |
| 4378 | 1796 |
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1797 static inline void |
| 4398 | 1798 do_subdir (str_llist_type *str_list_ptr, const std::string& elt, |
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1799 unsigned elt_length, const std::string& post) |
| 4378 | 1800 { |
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1801 #if defined (WIN32) |
| 4378 | 1802 WIN32_FIND_DATA find_file_data; |
| 1803 HANDLE hnd; | |
| 1804 int proceed; | |
| 1805 #else | |
| 1806 DIR *dir; | |
| 1807 struct dirent *e; | |
| 1808 #endif /* not WIN32 */ | |
| 4389 | 1809 |
| 4398 | 1810 std::string name = elt.substr (0, elt_length); |
| 4389 | 1811 |
| 4378 | 1812 assert (IS_DIR_SEP (elt[elt_length - 1]) |
| 1813 || IS_DEVICE_SEP (elt[elt_length - 1])); | |
| 4391 | 1814 |
| 4378 | 1815 #if defined (WIN32) |
| 4398 | 1816 |
| 1817 dirname = name + "/*.*"; /* "*.*" or "*" -- seems equivalent. */ | |
| 1818 | |
| 1819 hnd = FindFirstFile (dirname.c_str (), &find_file_data); | |
| 4378 | 1820 |
| 4389 | 1821 if (hnd == INVALID_HANDLE_VALUE) |
| 4378 | 1822 return; |
| 1823 | |
| 1824 /* Include top level before subdirectories, if nothing to match. */ | |
| 4398 | 1825 if (post.empty ()) |
| 4390 | 1826 dir_list_add (str_list_ptr, name); |
| 4398 | 1827 else |
| 1828 { | |
| 1829 /* If we do have something to match, see if it exists. For | |
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1830 example, POST might be 'pk/ljfour', and they might have a |
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1831 directory '$TEXMF/fonts/pk/ljfour' that we should find. */ |
| 4398 | 1832 name += post; |
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1833 checked_dir_list_add (str_list_ptr, name); |
| 4398 | 1834 name.resize (elt_length); |
| 1835 } | |
| 1836 | |
| 4378 | 1837 proceed = 1; |
| 4398 | 1838 |
| 4391 | 1839 while (proceed) |
| 1840 { | |
| 1841 if (find_file_data.cFileName[0] != '.') | |
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1842 { |
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1843 /* Construct the potential subdirectory name. */ |
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1844 name += find_file_data.cFileName; |
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1845 |
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1846 if (find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
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1847 { |
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1848 /* It's a directory, so append the separator. */ |
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1849 name += DIR_SEP_STRING; |
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1850 unsigned potential_len = name.length (); |
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1851 |
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1852 do_subdir (str_list_ptr, name, potential_len, post); |
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1853 } |
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1854 name.resize (elt_length); |
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1855 } |
| 4398 | 1856 |
| 4391 | 1857 proceed = FindNextFile (hnd, &find_file_data); |
| 4378 | 1858 } |
| 4398 | 1859 |
| 4391 | 1860 FindClose (hnd); |
| 4378 | 1861 |
| 1862 #else /* not WIN32 */ | |
| 1863 | |
| 1864 /* If we can't open it, quit. */ | |
| 10411 | 1865 dir = gnulib::opendir (name.c_str ()); |
| 4398 | 1866 |
| 1867 if (! dir) | |
| 4389 | 1868 return; |
| 4391 | 1869 |
| 4378 | 1870 /* Include top level before subdirectories, if nothing to match. */ |
| 4398 | 1871 if (post.empty ()) |
| 4390 | 1872 dir_list_add (str_list_ptr, name); |
| 4378 | 1873 else |
| 4398 | 1874 { |
| 1875 /* If we do have something to match, see if it exists. For | |
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1876 example, POST might be 'pk/ljfour', and they might have a |
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1877 directory '$TEXMF/fonts/pk/ljfour' that we should find. */ |
| 4389 | 1878 name += post; |
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1879 checked_dir_list_add (str_list_ptr, name); |
| 4389 | 1880 name.resize (elt_length); |
| 4378 | 1881 } |
| 1882 | |
| 14155 | 1883 while ((e = gnulib::readdir (dir))) |
| 4398 | 1884 { |
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1885 /* If it begins with a '.', never mind. (This allows "hidden" |
| 4378 | 1886 directories that the algorithm won't find.) */ |
| 4398 | 1887 |
| 4378 | 1888 if (e->d_name[0] != '.') |
| 1889 { | |
| 1890 /* Construct the potential subdirectory name. */ | |
| 4389 | 1891 name += e->d_name; |
| 4391 | 1892 |
| 4378 | 1893 /* If we can't stat it, or if it isn't a directory, continue. */ |
| 21865 | 1894 int links = dir_links (name); |
| 4378 | 1895 |
| 1896 if (links >= 0) | |
| 4391 | 1897 { |
| 4378 | 1898 /* It's a directory, so append the separator. */ |
| 4389 | 1899 name += DIR_SEP_STRING; |
| 1900 unsigned potential_len = name.length (); | |
| 4391 | 1901 |
| 4378 | 1902 /* Should we recurse? To see if the subdirectory is a |
| 1903 leaf, check if it has two links (one for . and one for | |
| 1904 ..). This means that symbolic links to directories do | |
| 1905 not affect the leaf-ness. This is arguably wrong, but | |
| 1906 the only alternative I know of is to stat every entry | |
| 1907 in the directory, and that is unacceptably slow. | |
| 4391 | 1908 |
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1909 The #if here makes all this configurable at |
| 4378 | 1910 compile-time, so that if we're using VMS directories or |
| 1911 some such, we can still find subdirectories, even if it | |
| 1912 is much slower. */ | |
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1913 #if defined (ST_NLINK_TRICK) |
| 5622 | 1914 if (links != 2) |
| 4378 | 1915 #endif /* not ST_NLINK_TRICK */ |
| 1916 /* All criteria are met; find subdirectories. */ | |
| 4398 | 1917 do_subdir (str_list_ptr, name, potential_len, post); |
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1918 #if defined (ST_NLINK_TRICK) |
| 4398 | 1919 else if (post.empty ()) |
| 4378 | 1920 /* Nothing to match, no recursive subdirectories to |
| 1921 look for: we're done with this branch. Add it. */ | |
| 4390 | 1922 dir_list_add (str_list_ptr, name); |
| 4378 | 1923 #endif |
| 1924 } | |
| 1925 | |
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1926 /* Remove the directory entry we just checked from 'name'. */ |
| 4389 | 1927 name.resize (elt_length); |
| 4378 | 1928 } |
| 1929 } | |
| 4391 | 1930 |
| 4378 | 1931 xclosedir (dir); |
| 1932 #endif /* not WIN32 */ | |
| 1933 } | |
| 1934 | |
| 1935 /* Here is the entry point. Returns directory list for ELT. */ | |
| 1936 | |
| 4399 | 1937 /* Given a path element ELT, return a pointer to a NULL-terminated list |
| 1938 of the corresponding (existing) directory or directories, with | |
| 1939 trailing slashes, or NULL. If ELT is the empty string, check the | |
| 1940 current working directory. | |
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1941 |
| 4399 | 1942 It's up to the caller to expand ELT. This is because this routine is |
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1943 most likely only useful to be called from 'kpse_path_search', which |
| 4399 | 1944 has already assumed expansion has been done. */ |
| 1945 | |
| 1946 static str_llist_type * | |
| 4398 | 1947 kpse_element_dirs (const std::string& elt) |
| 4378 | 1948 { |
| 1949 str_llist_type *ret; | |
| 1950 | |
| 1951 /* If given nothing, return nothing. */ | |
| 4398 | 1952 if (elt.empty ()) |
| 1953 return 0; | |
| 4378 | 1954 |
| 1955 /* If we've already cached the answer for ELT, return it. */ | |
| 1956 ret = cached (elt); | |
| 1957 if (ret) | |
| 1958 return ret; | |
| 1959 | |
| 1960 /* We're going to have a real directory list to return. */ | |
| 4390 | 1961 ret = new str_llist_type; |
| 4398 | 1962 *ret = 0; |
| 4378 | 1963 |
| 1964 /* We handle the hard case in a subroutine. */ | |
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1965 checked_dir_list_add (ret, elt); |
| 4378 | 1966 |
| 1967 /* Remember the directory list we just found, in case future calls are | |
| 1968 made with the same ELT. */ | |
| 1969 cache (elt, ret); | |
| 1970 | |
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1971 #if defined (KPSE_DEBUG) |
| 4378 | 1972 if (KPSE_DEBUG_P (KPSE_DEBUG_EXPAND)) |
| 1973 { | |
| 4398 | 1974 DEBUGF1 ("path element %s =>", elt.c_str ()); |
| 4378 | 1975 if (ret) |
| 1976 { | |
| 1977 str_llist_elt_type *e; | |
| 1978 for (e = *ret; e; e = STR_LLIST_NEXT (*e)) | |
| 10411 | 1979 gnulib::fprintf (stderr, " %s", (STR_LLIST (*e)).c_str ()); |
| 4378 | 1980 } |
| 10411 | 1981 gnulib::putc ('\n', stderr); |
|
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1982 gnulib::fflush (stderr); |
| 4378 | 1983 } |
| 1984 #endif /* KPSE_DEBUG */ | |
| 1985 | |
| 1986 return ret; | |
| 1987 } | |
| 1988 | |
|
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|
1989 #if ! defined (WIN32) |
| 4385 | 1990 void |
| 1991 xclosedir (DIR *d) | |
| 1992 { | |
| 10411 | 1993 int ret = gnulib::closedir (d); |
| 4391 | 1994 |
| 4385 | 1995 if (ret != 0) |
| 1996 FATAL ("closedir failed"); | |
| 1997 } | |
| 4386 | 1998 #endif |
| 4385 | 1999 |
| 4399 | 2000 /* Implementation of a linked list of strings. */ |
| 4385 | 2001 |
| 2002 /* Add the new string STR to the end of the list L. */ | |
| 2003 | |
| 5085 | 2004 static void |
| 4390 | 2005 str_llist_add (str_llist_type *l, const std::string& str) |
| 4385 | 2006 { |
| 2007 str_llist_elt_type *e; | |
| 4390 | 2008 str_llist_elt_type *new_elt = new str_llist_elt_type; |
| 4391 | 2009 |
| 4385 | 2010 /* The new element will be at the end of the list. */ |
| 2011 STR_LLIST (*new_elt) = str; | |
| 2012 STR_LLIST_MOVED (*new_elt) = 0; | |
| 4398 | 2013 STR_LLIST_NEXT (*new_elt) = 0; |
| 4391 | 2014 |
| 4385 | 2015 /* Find the current end of the list. */ |
| 2016 for (e = *l; e && STR_LLIST_NEXT (*e); e = STR_LLIST_NEXT (*e)) | |
| 2017 ; | |
| 4391 | 2018 |
| 2019 if (! e) | |
| 4385 | 2020 *l = new_elt; |
| 2021 else | |
| 2022 STR_LLIST_NEXT (*e) = new_elt; | |
| 2023 } | |
| 4392 | 2024 |
|
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2025 /* Move an element towards the top. The idea is that when a file is |
| 4385 | 2026 found in a given directory, later files will likely be in that same |
| 2027 directory, and looking for the file in all the directories in between | |
| 2028 is thus a waste. */ | |
| 2029 | |
| 5085 | 2030 static void |
| 4385 | 2031 str_llist_float (str_llist_type *l, str_llist_elt_type *mover) |
| 2032 { | |
| 2033 str_llist_elt_type *last_moved, *unmoved; | |
| 4391 | 2034 |
| 4385 | 2035 /* If we've already moved this element, never mind. */ |
| 2036 if (STR_LLIST_MOVED (*mover)) | |
| 2037 return; | |
| 4391 | 2038 |
| 4385 | 2039 /* Find the first unmoved element (to insert before). We're |
| 2040 guaranteed this will terminate, since MOVER itself is currently | |
| 2041 unmoved, and it must be in L (by hypothesis). */ | |
| 4398 | 2042 for (last_moved = 0, unmoved = *l; STR_LLIST_MOVED (*unmoved); |
| 4385 | 2043 last_moved = unmoved, unmoved = STR_LLIST_NEXT (*unmoved)) |
| 2044 ; | |
| 2045 | |
| 2046 /* If we are the first unmoved element, nothing to relink. */ | |
| 2047 if (unmoved != mover) | |
|
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2048 { |
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2049 /* Remember 'mover's current successor, so we can relink 'mover's |
| 4385 | 2050 predecessor to it. */ |
| 2051 str_llist_elt_type *before_mover; | |
| 2052 str_llist_elt_type *after_mover = STR_LLIST_NEXT (*mover); | |
| 4391 | 2053 |
|
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2054 /* Find 'mover's predecessor. */ |
| 4385 | 2055 for (before_mover = unmoved; STR_LLIST_NEXT (*before_mover) != mover; |
| 2056 before_mover = STR_LLIST_NEXT (*before_mover)) | |
| 2057 ; | |
| 4391 | 2058 |
|
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2059 /* 'before_mover' now links to 'after_mover'. */ |
| 4385 | 2060 STR_LLIST_NEXT (*before_mover) = after_mover; |
| 2061 | |
|
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2062 /* Insert 'mover' before 'unmoved' and after 'last_moved' (or at |
| 4385 | 2063 the head of the list). */ |
| 2064 STR_LLIST_NEXT (*mover) = unmoved; | |
| 4391 | 2065 if (! last_moved) |
| 4385 | 2066 *l = mover; |
| 2067 else | |
| 2068 STR_LLIST_NEXT (*last_moved) = mover; | |
| 2069 } | |
| 2070 | |
| 2071 /* We've moved it. */ | |
| 2072 STR_LLIST_MOVED (*mover) = 1; | |
| 2073 } | |
| 2074 | |
| 4399 | 2075 /* Variable expansion. */ |
| 4385 | 2076 |
| 2077 /* We have to keep track of variables being expanded, otherwise | |
| 2078 constructs like TEXINPUTS = $TEXINPUTS result in an infinite loop. | |
| 2079 (Or indirectly recursive variables, etc.) Our simple solution is to | |
| 2080 add to a list each time an expansion is started, and check the list | |
| 2081 before expanding. */ | |
| 2082 | |
| 4391 | 2083 static std::map <std::string, bool> expansions; |
| 4385 | 2084 |
| 2085 static void | |
| 4391 | 2086 expanding (const std::string& var, bool xp) |
| 4385 | 2087 { |
| 4391 | 2088 expansions[var] = xp; |
| 4385 | 2089 } |
| 2090 | |
| 2091 /* Return whether VAR is currently being expanding. */ | |
| 2092 | |
| 4391 | 2093 static bool |
| 2094 expanding_p (const std::string& var) | |
| 4385 | 2095 { |
|
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2096 return (expansions.find (var) != expansions.end ()) ? expansions[var] : false; |
| 4385 | 2097 } |
| 4392 | 2098 |
|
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2099 /* Append the result of value of 'var' to EXPANSION, where 'var' begins |
|
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|
2100 at START and ends at END. If 'var' is not set, do not complain. |
| 4385 | 2101 This is a subroutine for the more complicated expansion function. */ |
| 2102 | |
| 2103 static void | |
| 4391 | 2104 expand (std::string &expansion, const std::string& var) |
| 4385 | 2105 { |
| 4391 | 2106 if (expanding_p (var)) |
| 2107 { | |
|
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|
2108 (*current_liboctave_warning_with_id_handler) |
|
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2109 ("Octave:pathsearch-syntax", |
|
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2110 "kpathsea: variable '%s' references itself (eventually)", |
|
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|
2111 var.c_str ()); |
| 4385 | 2112 } |
| 4391 | 2113 else |
| 2114 { | |
| 2115 /* Check for an environment variable. */ | |
|
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|
2116 std::string value = octave::sys::env::getenv (var); |
| 4391 | 2117 |
| 2118 if (! value.empty ()) | |
|
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2119 { |
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2120 expanding (var, true); |
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2121 std::string tmp = kpse_var_expand (value); |
|
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2122 expanding (var, false); |
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2123 expansion += tmp; |
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|
2124 } |
| 4391 | 2125 } |
| 4385 | 2126 } |
| 4392 | 2127 |
| 4385 | 2128 /* Can't think of when it would be useful to change these (and the |
| 2129 diagnostic messages assume them), but ... */ | |
|
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2130 #if ! defined (IS_VAR_START) |
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|
2131 /* starts all variable references */ |
| 4385 | 2132 #define IS_VAR_START(c) ((c) == '$') |
| 2133 #endif | |
|
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2134 #if ! defined (IS_VAR_CHAR) |
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|
2135 /* variable name constituent */ |
| 4385 | 2136 #define IS_VAR_CHAR(c) (isalnum (c) || (c) == '_') |
| 2137 #endif | |
|
21724
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2138 #if ! defined (IS_VAR_BEGIN_DELIMITER) |
|
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|
2139 /* start delimited variable name (after $) */ |
| 4385 | 2140 #define IS_VAR_BEGIN_DELIMITER(c) ((c) == '{') |
| 2141 #endif | |
|
21724
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|
2142 #if ! defined (IS_VAR_END_DELIMITER) |
| 4385 | 2143 #define IS_VAR_END_DELIMITER(c) ((c) == '}') |
| 2144 #endif | |
| 2145 | |
| 2146 /* Maybe we should support some or all of the various shell ${...} | |
| 2147 constructs, especially ${var-value}. */ | |
| 2148 | |
| 5085 | 2149 static std::string |
| 4391 | 2150 kpse_var_expand (const std::string& src) |
| 4385 | 2151 { |
| 4389 | 2152 std::string expansion; |
| 4391 | 2153 |
| 2154 size_t src_len = src.length (); | |
| 2155 | |
| 4385 | 2156 /* Copy everything but variable constructs. */ |
| 4391 | 2157 for (size_t i = 0; i < src_len; i++) |
| 2158 { | |
| 2159 if (IS_VAR_START (src[i])) | |
|
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|
2160 { |
|
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|
2161 i++; |
|
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|
2162 |
|
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|
2163 /* Three cases: '$VAR', '${VAR}', '$<anything-else>'. */ |
|
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|
2164 if (IS_VAR_CHAR (src[i])) |
|
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|
2165 { |
|
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|
2166 /* $V: collect name constituents, then expand. */ |
|
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|
2167 size_t var_end = i; |
|
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|
2168 |
|
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|
2169 do |
|
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|
2170 { |
|
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|
2171 var_end++; |
|
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|
2172 } |
|
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|
2173 while (IS_VAR_CHAR (src[var_end])); |
|
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|
2174 |
|
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|
2175 var_end--; /* had to go one past */ |
|
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2176 expand (expansion, src.substr (i, var_end - i + 1)); |
|
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2177 i = var_end; |
|
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2178 |
|
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|
2179 } |
|
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|
2180 else if (IS_VAR_BEGIN_DELIMITER (src[i])) |
|
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2181 { |
|
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|
2182 /* ${: scan ahead for matching delimiter, then expand. */ |
|
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2183 size_t var_end = ++i; |
|
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2184 |
|
20955
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|
2185 while (var_end < src_len && ! IS_VAR_END_DELIMITER (src[var_end])) |
|
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2186 var_end++; |
|
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|
2187 |
|
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|
2188 if (var_end == src_len) |
|
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2189 { |
|
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2190 (*current_liboctave_warning_with_id_handler) |
|
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2191 ("Octave:pathsearch-syntax", |
|
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2192 "%s: No matching } for ${", src.c_str ()); |
|
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2193 i = var_end - 1; /* will incr to eos at top of loop */ |
|
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2194 } |
|
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2195 else |
|
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2196 { |
|
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|
2197 expand (expansion, src.substr (i, var_end - i)); |
|
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2198 i = var_end; /* will incr past } at top of loop*/ |
|
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2199 } |
|
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2200 } |
|
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2201 else |
|
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2202 { |
|
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2203 /* $<something-else>: error. */ |
|
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2204 (*current_liboctave_warning_with_id_handler) |
|
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2205 ("Octave:pathsearch-syntax", |
|
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2206 "%s: Unrecognized variable construct '$%c'", |
|
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2207 src.c_str (), src[i]); |
|
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2208 |
|
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2209 /* Just ignore those chars and keep going. */ |
|
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John W. Eaton <jwe@octave.org>
parents:
10182
diff
changeset
|
2210 } |
|
07ebe522dac2
untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents:
10182
diff
changeset
|
2211 } |
| 4391 | 2212 else |
|
10314
07ebe522dac2
untabify liboctave C++ sources
John W. Eaton <jwe@octave.org>
parents:
10182
diff
changeset
|
2213 expansion += src[i]; |
| 4391 | 2214 } |
| 4389 | 2215 |
| 2216 return expansion; | |
| 4385 | 2217 } |