Mercurial > hg > CbC > CbC_gcc
annotate libiberty/argv.c @ 108:7ad14f446135
add CbC-example/rectypeTest/
| author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Thu, 14 Jun 2012 20:30:24 +0900 |
| parents | f6334be47118 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Create and destroy argument vectors (argv's) |
|
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2 Copyright (C) 1992, 2001, 2010 Free Software Foundation, Inc. |
| 0 | 3 Written by Fred Fish @ Cygnus Support |
| 4 | |
| 5 This file is part of the libiberty library. | |
| 6 Libiberty is free software; you can redistribute it and/or | |
| 7 modify it under the terms of the GNU Library General Public | |
| 8 License as published by the Free Software Foundation; either | |
| 9 version 2 of the License, or (at your option) any later version. | |
| 10 | |
| 11 Libiberty is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 Library General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU Library General Public | |
| 17 License along with libiberty; see the file COPYING.LIB. If | |
| 18 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, | |
| 19 Boston, MA 02110-1301, USA. */ | |
| 20 | |
| 21 | |
| 22 /* Create and destroy argument vectors. An argument vector is simply an | |
| 23 array of string pointers, terminated by a NULL pointer. */ | |
| 24 | |
| 25 #ifdef HAVE_CONFIG_H | |
| 26 #include "config.h" | |
| 27 #endif | |
| 28 #include "ansidecl.h" | |
| 29 #include "libiberty.h" | |
| 30 #include "safe-ctype.h" | |
| 31 | |
| 32 /* Routines imported from standard C runtime libraries. */ | |
| 33 | |
| 34 #include <stddef.h> | |
| 35 #include <string.h> | |
| 36 #include <stdlib.h> | |
| 37 #include <stdio.h> | |
| 38 | |
| 39 #ifndef NULL | |
| 40 #define NULL 0 | |
| 41 #endif | |
| 42 | |
| 43 #ifndef EOS | |
| 44 #define EOS '\0' | |
| 45 #endif | |
| 46 | |
| 47 #define INITIAL_MAXARGC 8 /* Number of args + NULL in initial argv */ | |
| 48 | |
| 49 | |
| 50 /* | |
| 51 | |
| 52 @deftypefn Extension char** dupargv (char **@var{vector}) | |
| 53 | |
| 54 Duplicate an argument vector. Simply scans through @var{vector}, | |
| 55 duplicating each argument until the terminating @code{NULL} is found. | |
| 56 Returns a pointer to the argument vector if successful. Returns | |
| 57 @code{NULL} if there is insufficient memory to complete building the | |
| 58 argument vector. | |
| 59 | |
| 60 @end deftypefn | |
| 61 | |
| 62 */ | |
| 63 | |
| 64 char ** | |
| 65 dupargv (char **argv) | |
| 66 { | |
| 67 int argc; | |
| 68 char **copy; | |
| 69 | |
| 70 if (argv == NULL) | |
| 71 return NULL; | |
| 72 | |
| 73 /* the vector */ | |
| 74 for (argc = 0; argv[argc] != NULL; argc++); | |
| 75 copy = (char **) malloc ((argc + 1) * sizeof (char *)); | |
| 76 if (copy == NULL) | |
| 77 return NULL; | |
| 78 | |
| 79 /* the strings */ | |
| 80 for (argc = 0; argv[argc] != NULL; argc++) | |
| 81 { | |
| 82 int len = strlen (argv[argc]); | |
| 83 copy[argc] = (char *) malloc (len + 1); | |
| 84 if (copy[argc] == NULL) | |
| 85 { | |
| 86 freeargv (copy); | |
| 87 return NULL; | |
| 88 } | |
| 89 strcpy (copy[argc], argv[argc]); | |
| 90 } | |
| 91 copy[argc] = NULL; | |
| 92 return copy; | |
| 93 } | |
| 94 | |
| 95 /* | |
| 96 | |
| 97 @deftypefn Extension void freeargv (char **@var{vector}) | |
| 98 | |
| 99 Free an argument vector that was built using @code{buildargv}. Simply | |
| 100 scans through @var{vector}, freeing the memory for each argument until | |
| 101 the terminating @code{NULL} is found, and then frees @var{vector} | |
| 102 itself. | |
| 103 | |
| 104 @end deftypefn | |
| 105 | |
| 106 */ | |
| 107 | |
| 108 void freeargv (char **vector) | |
| 109 { | |
| 110 register char **scan; | |
| 111 | |
| 112 if (vector != NULL) | |
| 113 { | |
| 114 for (scan = vector; *scan != NULL; scan++) | |
| 115 { | |
| 116 free (*scan); | |
| 117 } | |
| 118 free (vector); | |
| 119 } | |
| 120 } | |
| 121 | |
|
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122 static void |
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123 consume_whitespace (const char **input) |
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124 { |
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125 while (ISSPACE (**input)) |
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126 { |
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127 (*input)++; |
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128 } |
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129 } |
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130 |
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131 static int |
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132 only_whitespace (const char* input) |
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133 { |
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134 while (*input != EOS && ISSPACE (*input)) |
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135 input++; |
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136 |
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137 return (*input == EOS); |
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138 } |
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139 |
| 0 | 140 /* |
| 141 | |
| 142 @deftypefn Extension char** buildargv (char *@var{sp}) | |
| 143 | |
| 144 Given a pointer to a string, parse the string extracting fields | |
| 145 separated by whitespace and optionally enclosed within either single | |
| 146 or double quotes (which are stripped off), and build a vector of | |
| 147 pointers to copies of the string for each field. The input string | |
| 148 remains unchanged. The last element of the vector is followed by a | |
| 149 @code{NULL} element. | |
| 150 | |
| 151 All of the memory for the pointer array and copies of the string | |
| 152 is obtained from @code{malloc}. All of the memory can be returned to the | |
| 153 system with the single function call @code{freeargv}, which takes the | |
| 154 returned result of @code{buildargv}, as it's argument. | |
| 155 | |
| 156 Returns a pointer to the argument vector if successful. Returns | |
| 157 @code{NULL} if @var{sp} is @code{NULL} or if there is insufficient | |
| 158 memory to complete building the argument vector. | |
| 159 | |
| 160 If the input is a null string (as opposed to a @code{NULL} pointer), | |
| 161 then buildarg returns an argument vector that has one arg, a null | |
| 162 string. | |
| 163 | |
| 164 @end deftypefn | |
| 165 | |
| 166 The memory for the argv array is dynamically expanded as necessary. | |
| 167 | |
| 168 In order to provide a working buffer for extracting arguments into, | |
| 169 with appropriate stripping of quotes and translation of backslash | |
| 170 sequences, we allocate a working buffer at least as long as the input | |
| 171 string. This ensures that we always have enough space in which to | |
| 172 work, since the extracted arg is never larger than the input string. | |
| 173 | |
| 174 The argument vector is always kept terminated with a @code{NULL} arg | |
| 175 pointer, so it can be passed to @code{freeargv} at any time, or | |
| 176 returned, as appropriate. | |
| 177 | |
| 178 */ | |
| 179 | |
| 180 char **buildargv (const char *input) | |
| 181 { | |
| 182 char *arg; | |
| 183 char *copybuf; | |
| 184 int squote = 0; | |
| 185 int dquote = 0; | |
| 186 int bsquote = 0; | |
| 187 int argc = 0; | |
| 188 int maxargc = 0; | |
| 189 char **argv = NULL; | |
| 190 char **nargv; | |
| 191 | |
| 192 if (input != NULL) | |
| 193 { | |
| 194 copybuf = (char *) alloca (strlen (input) + 1); | |
| 195 /* Is a do{}while to always execute the loop once. Always return an | |
| 196 argv, even for null strings. See NOTES above, test case below. */ | |
| 197 do | |
| 198 { | |
| 199 /* Pick off argv[argc] */ | |
|
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200 consume_whitespace (&input); |
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201 |
| 0 | 202 if ((maxargc == 0) || (argc >= (maxargc - 1))) |
| 203 { | |
| 204 /* argv needs initialization, or expansion */ | |
| 205 if (argv == NULL) | |
| 206 { | |
| 207 maxargc = INITIAL_MAXARGC; | |
| 208 nargv = (char **) malloc (maxargc * sizeof (char *)); | |
| 209 } | |
| 210 else | |
| 211 { | |
| 212 maxargc *= 2; | |
| 213 nargv = (char **) realloc (argv, maxargc * sizeof (char *)); | |
| 214 } | |
| 215 if (nargv == NULL) | |
| 216 { | |
| 217 if (argv != NULL) | |
| 218 { | |
| 219 freeargv (argv); | |
| 220 argv = NULL; | |
| 221 } | |
| 222 break; | |
| 223 } | |
| 224 argv = nargv; | |
| 225 argv[argc] = NULL; | |
| 226 } | |
| 227 /* Begin scanning arg */ | |
| 228 arg = copybuf; | |
| 229 while (*input != EOS) | |
| 230 { | |
| 231 if (ISSPACE (*input) && !squote && !dquote && !bsquote) | |
| 232 { | |
| 233 break; | |
| 234 } | |
| 235 else | |
| 236 { | |
| 237 if (bsquote) | |
| 238 { | |
| 239 bsquote = 0; | |
| 240 *arg++ = *input; | |
| 241 } | |
| 242 else if (*input == '\\') | |
| 243 { | |
| 244 bsquote = 1; | |
| 245 } | |
| 246 else if (squote) | |
| 247 { | |
| 248 if (*input == '\'') | |
| 249 { | |
| 250 squote = 0; | |
| 251 } | |
| 252 else | |
| 253 { | |
| 254 *arg++ = *input; | |
| 255 } | |
| 256 } | |
| 257 else if (dquote) | |
| 258 { | |
| 259 if (*input == '"') | |
| 260 { | |
| 261 dquote = 0; | |
| 262 } | |
| 263 else | |
| 264 { | |
| 265 *arg++ = *input; | |
| 266 } | |
| 267 } | |
| 268 else | |
| 269 { | |
| 270 if (*input == '\'') | |
| 271 { | |
| 272 squote = 1; | |
| 273 } | |
| 274 else if (*input == '"') | |
| 275 { | |
| 276 dquote = 1; | |
| 277 } | |
| 278 else | |
| 279 { | |
| 280 *arg++ = *input; | |
| 281 } | |
| 282 } | |
| 283 input++; | |
| 284 } | |
| 285 } | |
| 286 *arg = EOS; | |
| 287 argv[argc] = strdup (copybuf); | |
| 288 if (argv[argc] == NULL) | |
| 289 { | |
| 290 freeargv (argv); | |
| 291 argv = NULL; | |
| 292 break; | |
| 293 } | |
| 294 argc++; | |
| 295 argv[argc] = NULL; | |
| 296 | |
|
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297 consume_whitespace (&input); |
| 0 | 298 } |
| 299 while (*input != EOS); | |
| 300 } | |
| 301 return (argv); | |
| 302 } | |
| 303 | |
| 304 /* | |
| 305 | |
| 306 @deftypefn Extension int writeargv (const char **@var{argv}, FILE *@var{file}) | |
| 307 | |
| 308 Write each member of ARGV, handling all necessary quoting, to the file | |
| 309 named by FILE, separated by whitespace. Return 0 on success, non-zero | |
| 310 if an error occurred while writing to FILE. | |
| 311 | |
| 312 @end deftypefn | |
| 313 | |
| 314 */ | |
| 315 | |
| 316 int | |
| 317 writeargv (char **argv, FILE *f) | |
| 318 { | |
| 319 int status = 0; | |
| 320 | |
| 321 if (f == NULL) | |
| 322 return 1; | |
| 323 | |
| 324 while (*argv != NULL) | |
| 325 { | |
| 326 const char *arg = *argv; | |
| 327 | |
| 328 while (*arg != EOS) | |
| 329 { | |
| 330 char c = *arg; | |
| 331 | |
| 332 if (ISSPACE(c) || c == '\\' || c == '\'' || c == '"') | |
| 333 if (EOF == fputc ('\\', f)) | |
| 334 { | |
| 335 status = 1; | |
| 336 goto done; | |
| 337 } | |
| 338 | |
| 339 if (EOF == fputc (c, f)) | |
| 340 { | |
| 341 status = 1; | |
| 342 goto done; | |
| 343 } | |
| 344 arg++; | |
| 345 } | |
| 346 | |
| 347 if (EOF == fputc ('\n', f)) | |
| 348 { | |
| 349 status = 1; | |
| 350 goto done; | |
| 351 } | |
| 352 argv++; | |
| 353 } | |
| 354 | |
| 355 done: | |
| 356 return status; | |
| 357 } | |
| 358 | |
| 359 /* | |
| 360 | |
| 361 @deftypefn Extension void expandargv (int *@var{argcp}, char ***@var{argvp}) | |
| 362 | |
| 363 The @var{argcp} and @code{argvp} arguments are pointers to the usual | |
| 364 @code{argc} and @code{argv} arguments to @code{main}. This function | |
| 365 looks for arguments that begin with the character @samp{@@}. Any such | |
| 366 arguments are interpreted as ``response files''. The contents of the | |
| 367 response file are interpreted as additional command line options. In | |
| 368 particular, the file is separated into whitespace-separated strings; | |
| 369 each such string is taken as a command-line option. The new options | |
| 370 are inserted in place of the option naming the response file, and | |
| 371 @code{*argcp} and @code{*argvp} will be updated. If the value of | |
| 372 @code{*argvp} is modified by this function, then the new value has | |
| 373 been dynamically allocated and can be deallocated by the caller with | |
| 374 @code{freeargv}. However, most callers will simply call | |
| 375 @code{expandargv} near the beginning of @code{main} and allow the | |
| 376 operating system to free the memory when the program exits. | |
| 377 | |
| 378 @end deftypefn | |
| 379 | |
| 380 */ | |
| 381 | |
| 382 void | |
| 383 expandargv (int *argcp, char ***argvp) | |
| 384 { | |
| 385 /* The argument we are currently processing. */ | |
| 386 int i = 0; | |
| 387 /* Non-zero if ***argvp has been dynamically allocated. */ | |
| 388 int argv_dynamic = 0; | |
|
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389 /* Limit the number of response files that we parse in order |
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390 to prevent infinite recursion. */ |
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391 unsigned int iteration_limit = 2000; |
| 0 | 392 /* Loop over the arguments, handling response files. We always skip |
| 393 ARGVP[0], as that is the name of the program being run. */ | |
| 394 while (++i < *argcp) | |
| 395 { | |
| 396 /* The name of the response file. */ | |
| 397 const char *filename; | |
| 398 /* The response file. */ | |
| 399 FILE *f; | |
| 400 /* An upper bound on the number of characters in the response | |
| 401 file. */ | |
| 402 long pos; | |
| 403 /* The number of characters in the response file, when actually | |
| 404 read. */ | |
| 405 size_t len; | |
| 406 /* A dynamically allocated buffer used to hold options read from a | |
| 407 response file. */ | |
| 408 char *buffer; | |
| 409 /* Dynamically allocated storage for the options read from the | |
| 410 response file. */ | |
| 411 char **file_argv; | |
| 412 /* The number of options read from the response file, if any. */ | |
| 413 size_t file_argc; | |
| 414 /* We are only interested in options of the form "@file". */ | |
| 415 filename = (*argvp)[i]; | |
| 416 if (filename[0] != '@') | |
| 417 continue; | |
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418 /* If we have iterated too many times then stop. */ |
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419 if (-- iteration_limit == 0) |
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420 { |
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421 fprintf (stderr, "%s: error: too many @-files encountered\n", (*argvp)[0]); |
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422 xexit (1); |
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423 } |
| 0 | 424 /* Read the contents of the file. */ |
| 425 f = fopen (++filename, "r"); | |
| 426 if (!f) | |
| 427 continue; | |
| 428 if (fseek (f, 0L, SEEK_END) == -1) | |
| 429 goto error; | |
| 430 pos = ftell (f); | |
| 431 if (pos == -1) | |
| 432 goto error; | |
| 433 if (fseek (f, 0L, SEEK_SET) == -1) | |
| 434 goto error; | |
| 435 buffer = (char *) xmalloc (pos * sizeof (char) + 1); | |
| 436 len = fread (buffer, sizeof (char), pos, f); | |
| 437 if (len != (size_t) pos | |
| 438 /* On Windows, fread may return a value smaller than POS, | |
| 439 due to CR/LF->CR translation when reading text files. | |
| 440 That does not in-and-of itself indicate failure. */ | |
| 441 && ferror (f)) | |
| 442 goto error; | |
| 443 /* Add a NUL terminator. */ | |
| 444 buffer[len] = '\0'; | |
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445 /* If the file is empty or contains only whitespace, buildargv would |
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446 return a single empty argument. In this context we want no arguments, |
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447 instead. */ |
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448 if (only_whitespace (buffer)) |
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449 { |
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450 file_argv = (char **) xmalloc (sizeof (char *)); |
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451 file_argv[0] = NULL; |
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452 } |
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453 else |
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454 /* Parse the string. */ |
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455 file_argv = buildargv (buffer); |
| 0 | 456 /* If *ARGVP is not already dynamically allocated, copy it. */ |
| 457 if (!argv_dynamic) | |
| 458 { | |
| 459 *argvp = dupargv (*argvp); | |
| 460 if (!*argvp) | |
| 461 { | |
| 462 fputs ("\nout of memory\n", stderr); | |
| 463 xexit (1); | |
| 464 } | |
| 465 } | |
| 466 /* Count the number of arguments. */ | |
| 467 file_argc = 0; | |
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468 while (file_argv[file_argc]) |
| 0 | 469 ++file_argc; |
| 470 /* Now, insert FILE_ARGV into ARGV. The "+1" below handles the | |
| 471 NULL terminator at the end of ARGV. */ | |
| 472 *argvp = ((char **) | |
| 473 xrealloc (*argvp, | |
| 474 (*argcp + file_argc + 1) * sizeof (char *))); | |
| 475 memmove (*argvp + i + file_argc, *argvp + i + 1, | |
| 476 (*argcp - i) * sizeof (char *)); | |
| 477 memcpy (*argvp + i, file_argv, file_argc * sizeof (char *)); | |
| 478 /* The original option has been replaced by all the new | |
| 479 options. */ | |
| 480 *argcp += file_argc - 1; | |
| 481 /* Free up memory allocated to process the response file. We do | |
| 482 not use freeargv because the individual options in FILE_ARGV | |
| 483 are now in the main ARGV. */ | |
| 484 free (file_argv); | |
| 485 free (buffer); | |
| 486 /* Rescan all of the arguments just read to support response | |
| 487 files that include other response files. */ | |
| 488 --i; | |
| 489 error: | |
| 490 /* We're all done with the file now. */ | |
| 491 fclose (f); | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 #ifdef MAIN | |
| 496 | |
| 497 /* Simple little test driver. */ | |
| 498 | |
| 499 static const char *const tests[] = | |
| 500 { | |
| 501 "a simple command line", | |
| 502 "arg 'foo' is single quoted", | |
| 503 "arg \"bar\" is double quoted", | |
| 504 "arg \"foo bar\" has embedded whitespace", | |
| 505 "arg 'Jack said \\'hi\\'' has single quotes", | |
| 506 "arg 'Jack said \\\"hi\\\"' has double quotes", | |
| 507 "a b c d e f g h i j k l m n o p q r s t u v w x y z 1 2 3 4 5 6 7 8 9", | |
| 508 | |
| 509 /* This should be expanded into only one argument. */ | |
| 510 "trailing-whitespace ", | |
| 511 | |
| 512 "", | |
| 513 NULL | |
| 514 }; | |
| 515 | |
| 516 int | |
| 517 main (void) | |
| 518 { | |
| 519 char **argv; | |
| 520 const char *const *test; | |
| 521 char **targs; | |
| 522 | |
| 523 for (test = tests; *test != NULL; test++) | |
| 524 { | |
| 525 printf ("buildargv(\"%s\")\n", *test); | |
| 526 if ((argv = buildargv (*test)) == NULL) | |
| 527 { | |
| 528 printf ("failed!\n\n"); | |
| 529 } | |
| 530 else | |
| 531 { | |
| 532 for (targs = argv; *targs != NULL; targs++) | |
| 533 { | |
| 534 printf ("\t\"%s\"\n", *targs); | |
| 535 } | |
| 536 printf ("\n"); | |
| 537 } | |
| 538 freeargv (argv); | |
| 539 } | |
| 540 | |
| 541 return 0; | |
| 542 } | |
| 543 | |
| 544 #endif /* MAIN */ |