Mercurial > hg > CbC > CbC_gcc
comparison libiberty/functions.texi @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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children | 77e2b8dfacca |
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1 @c Automatically generated from *.c and others (the comments before | |
2 @c each entry tell you which file and where in that file). DO NOT EDIT! | |
3 @c Edit the *.c files, configure with --enable-maintainer-mode, | |
4 @c and let gather-docs build you a new copy. | |
5 | |
6 @c safe-ctype.c:25 | |
7 @defvr Extension HOST_CHARSET | |
8 This macro indicates the basic character set and encoding used by the | |
9 host: more precisely, the encoding used for character constants in | |
10 preprocessor @samp{#if} statements (the C "execution character set"). | |
11 It is defined by @file{safe-ctype.h}, and will be an integer constant | |
12 with one of the following values: | |
13 | |
14 @ftable @code | |
15 @item HOST_CHARSET_UNKNOWN | |
16 The host character set is unknown - that is, not one of the next two | |
17 possibilities. | |
18 | |
19 @item HOST_CHARSET_ASCII | |
20 The host character set is ASCII. | |
21 | |
22 @item HOST_CHARSET_EBCDIC | |
23 The host character set is some variant of EBCDIC. (Only one of the | |
24 nineteen EBCDIC varying characters is tested; exercise caution.) | |
25 @end ftable | |
26 @end defvr | |
27 | |
28 @c alloca.c:26 | |
29 @deftypefn Replacement void* alloca (size_t @var{size}) | |
30 | |
31 This function allocates memory which will be automatically reclaimed | |
32 after the procedure exits. The @libib{} implementation does not free | |
33 the memory immediately but will do so eventually during subsequent | |
34 calls to this function. Memory is allocated using @code{xmalloc} under | |
35 normal circumstances. | |
36 | |
37 The header file @file{alloca-conf.h} can be used in conjunction with the | |
38 GNU Autoconf test @code{AC_FUNC_ALLOCA} to test for and properly make | |
39 available this function. The @code{AC_FUNC_ALLOCA} test requires that | |
40 client code use a block of preprocessor code to be safe (see the Autoconf | |
41 manual for more); this header incorporates that logic and more, including | |
42 the possibility of a GCC built-in function. | |
43 | |
44 @end deftypefn | |
45 | |
46 @c asprintf.c:32 | |
47 @deftypefn Extension int asprintf (char **@var{resptr}, const char *@var{format}, ...) | |
48 | |
49 Like @code{sprintf}, but instead of passing a pointer to a buffer, you | |
50 pass a pointer to a pointer. This function will compute the size of | |
51 the buffer needed, allocate memory with @code{malloc}, and store a | |
52 pointer to the allocated memory in @code{*@var{resptr}}. The value | |
53 returned is the same as @code{sprintf} would return. If memory could | |
54 not be allocated, minus one is returned and @code{NULL} is stored in | |
55 @code{*@var{resptr}}. | |
56 | |
57 @end deftypefn | |
58 | |
59 @c atexit.c:6 | |
60 @deftypefn Supplemental int atexit (void (*@var{f})()) | |
61 | |
62 Causes function @var{f} to be called at exit. Returns 0. | |
63 | |
64 @end deftypefn | |
65 | |
66 @c basename.c:6 | |
67 @deftypefn Supplemental char* basename (const char *@var{name}) | |
68 | |
69 Returns a pointer to the last component of pathname @var{name}. | |
70 Behavior is undefined if the pathname ends in a directory separator. | |
71 | |
72 @end deftypefn | |
73 | |
74 @c bcmp.c:6 | |
75 @deftypefn Supplemental int bcmp (char *@var{x}, char *@var{y}, int @var{count}) | |
76 | |
77 Compares the first @var{count} bytes of two areas of memory. Returns | |
78 zero if they are the same, nonzero otherwise. Returns zero if | |
79 @var{count} is zero. A nonzero result only indicates a difference, | |
80 it does not indicate any sorting order (say, by having a positive | |
81 result mean @var{x} sorts before @var{y}). | |
82 | |
83 @end deftypefn | |
84 | |
85 @c bcopy.c:3 | |
86 @deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length}) | |
87 | |
88 Copies @var{length} bytes from memory region @var{in} to region | |
89 @var{out}. The use of @code{bcopy} is deprecated in new programs. | |
90 | |
91 @end deftypefn | |
92 | |
93 @c bsearch.c:33 | |
94 @deftypefn Supplemental void* bsearch (const void *@var{key}, const void *@var{base}, size_t @var{nmemb}, size_t @var{size}, int (*@var{compar})(const void *, const void *)) | |
95 | |
96 Performs a search over an array of @var{nmemb} elements pointed to by | |
97 @var{base} for a member that matches the object pointed to by @var{key}. | |
98 The size of each member is specified by @var{size}. The array contents | |
99 should be sorted in ascending order according to the @var{compar} | |
100 comparison function. This routine should take two arguments pointing to | |
101 the @var{key} and to an array member, in that order, and should return an | |
102 integer less than, equal to, or greater than zero if the @var{key} object | |
103 is respectively less than, matching, or greater than the array member. | |
104 | |
105 @end deftypefn | |
106 | |
107 @c argv.c:124 | |
108 @deftypefn Extension char** buildargv (char *@var{sp}) | |
109 | |
110 Given a pointer to a string, parse the string extracting fields | |
111 separated by whitespace and optionally enclosed within either single | |
112 or double quotes (which are stripped off), and build a vector of | |
113 pointers to copies of the string for each field. The input string | |
114 remains unchanged. The last element of the vector is followed by a | |
115 @code{NULL} element. | |
116 | |
117 All of the memory for the pointer array and copies of the string | |
118 is obtained from @code{malloc}. All of the memory can be returned to the | |
119 system with the single function call @code{freeargv}, which takes the | |
120 returned result of @code{buildargv}, as it's argument. | |
121 | |
122 Returns a pointer to the argument vector if successful. Returns | |
123 @code{NULL} if @var{sp} is @code{NULL} or if there is insufficient | |
124 memory to complete building the argument vector. | |
125 | |
126 If the input is a null string (as opposed to a @code{NULL} pointer), | |
127 then buildarg returns an argument vector that has one arg, a null | |
128 string. | |
129 | |
130 @end deftypefn | |
131 | |
132 @c bzero.c:6 | |
133 @deftypefn Supplemental void bzero (char *@var{mem}, int @var{count}) | |
134 | |
135 Zeros @var{count} bytes starting at @var{mem}. Use of this function | |
136 is deprecated in favor of @code{memset}. | |
137 | |
138 @end deftypefn | |
139 | |
140 @c calloc.c:6 | |
141 @deftypefn Supplemental void* calloc (size_t @var{nelem}, size_t @var{elsize}) | |
142 | |
143 Uses @code{malloc} to allocate storage for @var{nelem} objects of | |
144 @var{elsize} bytes each, then zeros the memory. | |
145 | |
146 @end deftypefn | |
147 | |
148 @c choose-temp.c:42 | |
149 @deftypefn Extension char* choose_temp_base (void) | |
150 | |
151 Return a prefix for temporary file names or @code{NULL} if unable to | |
152 find one. The current directory is chosen if all else fails so the | |
153 program is exited if a temporary directory can't be found (@code{mktemp} | |
154 fails). The buffer for the result is obtained with @code{xmalloc}. | |
155 | |
156 This function is provided for backwards compatibility only. Its use is | |
157 not recommended. | |
158 | |
159 @end deftypefn | |
160 | |
161 @c make-temp-file.c:87 | |
162 @deftypefn Replacement char* choose_tmpdir () | |
163 | |
164 Returns a pointer to a directory path suitable for creating temporary | |
165 files in. | |
166 | |
167 @end deftypefn | |
168 | |
169 @c clock.c:27 | |
170 @deftypefn Supplemental long clock (void) | |
171 | |
172 Returns an approximation of the CPU time used by the process as a | |
173 @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the | |
174 number of seconds used. | |
175 | |
176 @end deftypefn | |
177 | |
178 @c concat.c:24 | |
179 @deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @dots{}, @code{NULL}) | |
180 | |
181 Concatenate zero or more of strings and return the result in freshly | |
182 @code{xmalloc}ed memory. Returns @code{NULL} if insufficient memory is | |
183 available. The argument list is terminated by the first @code{NULL} | |
184 pointer encountered. Pointers to empty strings are ignored. | |
185 | |
186 @end deftypefn | |
187 | |
188 @c argv.c:52 | |
189 @deftypefn Extension char** dupargv (char **@var{vector}) | |
190 | |
191 Duplicate an argument vector. Simply scans through @var{vector}, | |
192 duplicating each argument until the terminating @code{NULL} is found. | |
193 Returns a pointer to the argument vector if successful. Returns | |
194 @code{NULL} if there is insufficient memory to complete building the | |
195 argument vector. | |
196 | |
197 @end deftypefn | |
198 | |
199 @c strerror.c:567 | |
200 @deftypefn Extension int errno_max (void) | |
201 | |
202 Returns the maximum @code{errno} value for which a corresponding | |
203 symbolic name or message is available. Note that in the case where we | |
204 use the @code{sys_errlist} supplied by the system, it is possible for | |
205 there to be more symbolic names than messages, or vice versa. In | |
206 fact, the manual page for @code{perror(3C)} explicitly warns that one | |
207 should check the size of the table (@code{sys_nerr}) before indexing | |
208 it, since new error codes may be added to the system before they are | |
209 added to the table. Thus @code{sys_nerr} might be smaller than value | |
210 implied by the largest @code{errno} value defined in @code{<errno.h>}. | |
211 | |
212 We return the maximum value that can be used to obtain a meaningful | |
213 symbolic name or message. | |
214 | |
215 @end deftypefn | |
216 | |
217 @c argv.c:348 | |
218 @deftypefn Extension void expandargv (int *@var{argcp}, char ***@var{argvp}) | |
219 | |
220 The @var{argcp} and @code{argvp} arguments are pointers to the usual | |
221 @code{argc} and @code{argv} arguments to @code{main}. This function | |
222 looks for arguments that begin with the character @samp{@@}. Any such | |
223 arguments are interpreted as ``response files''. The contents of the | |
224 response file are interpreted as additional command line options. In | |
225 particular, the file is separated into whitespace-separated strings; | |
226 each such string is taken as a command-line option. The new options | |
227 are inserted in place of the option naming the response file, and | |
228 @code{*argcp} and @code{*argvp} will be updated. If the value of | |
229 @code{*argvp} is modified by this function, then the new value has | |
230 been dynamically allocated and can be deallocated by the caller with | |
231 @code{freeargv}. However, most callers will simply call | |
232 @code{expandargv} near the beginning of @code{main} and allow the | |
233 operating system to free the memory when the program exits. | |
234 | |
235 @end deftypefn | |
236 | |
237 @c fdmatch.c:23 | |
238 @deftypefn Extension int fdmatch (int @var{fd1}, int @var{fd2}) | |
239 | |
240 Check to see if two open file descriptors refer to the same file. | |
241 This is useful, for example, when we have an open file descriptor for | |
242 an unnamed file, and the name of a file that we believe to correspond | |
243 to that fd. This can happen when we are exec'd with an already open | |
244 file (@code{stdout} for example) or from the SVR4 @file{/proc} calls | |
245 that return open file descriptors for mapped address spaces. All we | |
246 have to do is open the file by name and check the two file descriptors | |
247 for a match, which is done by comparing major and minor device numbers | |
248 and inode numbers. | |
249 | |
250 @end deftypefn | |
251 | |
252 @c fopen_unlocked.c:48 | |
253 @deftypefn Extension {FILE *} fdopen_unlocked (int @var{fildes}, const char * @var{mode}) | |
254 | |
255 Opens and returns a @code{FILE} pointer via @code{fdopen}. If the | |
256 operating system supports it, ensure that the stream is setup to avoid | |
257 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
258 unchanged. | |
259 | |
260 @end deftypefn | |
261 | |
262 @c ffs.c:3 | |
263 @deftypefn Supplemental int ffs (int @var{valu}) | |
264 | |
265 Find the first (least significant) bit set in @var{valu}. Bits are | |
266 numbered from right to left, starting with bit 1 (corresponding to the | |
267 value 1). If @var{valu} is zero, zero is returned. | |
268 | |
269 @end deftypefn | |
270 | |
271 @c filename_cmp.c:32 | |
272 @deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2}) | |
273 | |
274 Return zero if the two file names @var{s1} and @var{s2} are equivalent. | |
275 If not equivalent, the returned value is similar to what @code{strcmp} | |
276 would return. In other words, it returns a negative value if @var{s1} | |
277 is less than @var{s2}, or a positive value if @var{s2} is greater than | |
278 @var{s2}. | |
279 | |
280 This function does not normalize file names. As a result, this function | |
281 will treat filenames that are spelled differently as different even in | |
282 the case when the two filenames point to the same underlying file. | |
283 However, it does handle the fact that on DOS-like file systems, forward | |
284 and backward slashes are equal. | |
285 | |
286 @end deftypefn | |
287 | |
288 @c fnmatch.txh:1 | |
289 @deftypefn Replacement int fnmatch (const char *@var{pattern}, const char *@var{string}, int @var{flags}) | |
290 | |
291 Matches @var{string} against @var{pattern}, returning zero if it | |
292 matches, @code{FNM_NOMATCH} if not. @var{pattern} may contain the | |
293 wildcards @code{?} to match any one character, @code{*} to match any | |
294 zero or more characters, or a set of alternate characters in square | |
295 brackets, like @samp{[a-gt8]}, which match one character (@code{a} | |
296 through @code{g}, or @code{t}, or @code{8}, in this example) if that one | |
297 character is in the set. A set may be inverted (i.e., match anything | |
298 except what's in the set) by giving @code{^} or @code{!} as the first | |
299 character in the set. To include those characters in the set, list them | |
300 as anything other than the first character of the set. To include a | |
301 dash in the set, list it last in the set. A backslash character makes | |
302 the following character not special, so for example you could match | |
303 against a literal asterisk with @samp{\*}. To match a literal | |
304 backslash, use @samp{\\}. | |
305 | |
306 @code{flags} controls various aspects of the matching process, and is a | |
307 boolean OR of zero or more of the following values (defined in | |
308 @code{<fnmatch.h>}): | |
309 | |
310 @table @code | |
311 | |
312 @item FNM_PATHNAME | |
313 @itemx FNM_FILE_NAME | |
314 @var{string} is assumed to be a path name. No wildcard will ever match | |
315 @code{/}. | |
316 | |
317 @item FNM_NOESCAPE | |
318 Do not interpret backslashes as quoting the following special character. | |
319 | |
320 @item FNM_PERIOD | |
321 A leading period (at the beginning of @var{string}, or if | |
322 @code{FNM_PATHNAME} after a slash) is not matched by @code{*} or | |
323 @code{?} but must be matched explicitly. | |
324 | |
325 @item FNM_LEADING_DIR | |
326 Means that @var{string} also matches @var{pattern} if some initial part | |
327 of @var{string} matches, and is followed by @code{/} and zero or more | |
328 characters. For example, @samp{foo*} would match either @samp{foobar} | |
329 or @samp{foobar/grill}. | |
330 | |
331 @item FNM_CASEFOLD | |
332 Ignores case when performing the comparison. | |
333 | |
334 @end table | |
335 | |
336 @end deftypefn | |
337 | |
338 @c fopen_unlocked.c:39 | |
339 @deftypefn Extension {FILE *} fopen_unlocked (const char *@var{path}, const char * @var{mode}) | |
340 | |
341 Opens and returns a @code{FILE} pointer via @code{fopen}. If the | |
342 operating system supports it, ensure that the stream is setup to avoid | |
343 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
344 unchanged. | |
345 | |
346 @end deftypefn | |
347 | |
348 @c argv.c:97 | |
349 @deftypefn Extension void freeargv (char **@var{vector}) | |
350 | |
351 Free an argument vector that was built using @code{buildargv}. Simply | |
352 scans through @var{vector}, freeing the memory for each argument until | |
353 the terminating @code{NULL} is found, and then frees @var{vector} | |
354 itself. | |
355 | |
356 @end deftypefn | |
357 | |
358 @c fopen_unlocked.c:57 | |
359 @deftypefn Extension {FILE *} freopen_unlocked (const char * @var{path}, const char * @var{mode}, FILE * @var{stream}) | |
360 | |
361 Opens and returns a @code{FILE} pointer via @code{freopen}. If the | |
362 operating system supports it, ensure that the stream is setup to avoid | |
363 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
364 unchanged. | |
365 | |
366 @end deftypefn | |
367 | |
368 @c getruntime.c:82 | |
369 @deftypefn Replacement long get_run_time (void) | |
370 | |
371 Returns the time used so far, in microseconds. If possible, this is | |
372 the time used by this process, else it is the elapsed time since the | |
373 process started. | |
374 | |
375 @end deftypefn | |
376 | |
377 @c getcwd.c:6 | |
378 @deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len}) | |
379 | |
380 Copy the absolute pathname for the current working directory into | |
381 @var{pathname}, which is assumed to point to a buffer of at least | |
382 @var{len} bytes, and return a pointer to the buffer. If the current | |
383 directory's path doesn't fit in @var{len} characters, the result is | |
384 @code{NULL} and @code{errno} is set. If @var{pathname} is a null pointer, | |
385 @code{getcwd} will obtain @var{len} bytes of space using | |
386 @code{malloc}. | |
387 | |
388 @end deftypefn | |
389 | |
390 @c getpagesize.c:5 | |
391 @deftypefn Supplemental int getpagesize (void) | |
392 | |
393 Returns the number of bytes in a page of memory. This is the | |
394 granularity of many of the system memory management routines. No | |
395 guarantee is made as to whether or not it is the same as the basic | |
396 memory management hardware page size. | |
397 | |
398 @end deftypefn | |
399 | |
400 @c getpwd.c:5 | |
401 @deftypefn Supplemental char* getpwd (void) | |
402 | |
403 Returns the current working directory. This implementation caches the | |
404 result on the assumption that the process will not call @code{chdir} | |
405 between calls to @code{getpwd}. | |
406 | |
407 @end deftypefn | |
408 | |
409 @c gettimeofday.c:12 | |
410 @deftypefn Supplemental int gettimeofday (struct timeval *@var{tp}, void *@var{tz}) | |
411 | |
412 Writes the current time to @var{tp}. This implementation requires | |
413 that @var{tz} be NULL. Returns 0 on success, -1 on failure. | |
414 | |
415 @end deftypefn | |
416 | |
417 @c hex.c:33 | |
418 @deftypefn Extension void hex_init (void) | |
419 | |
420 Initializes the array mapping the current character set to | |
421 corresponding hex values. This function must be called before any | |
422 call to @code{hex_p} or @code{hex_value}. If you fail to call it, a | |
423 default ASCII-based table will normally be used on ASCII systems. | |
424 | |
425 @end deftypefn | |
426 | |
427 @c hex.c:42 | |
428 @deftypefn Extension int hex_p (int @var{c}) | |
429 | |
430 Evaluates to non-zero if the given character is a valid hex character, | |
431 or zero if it is not. Note that the value you pass will be cast to | |
432 @code{unsigned char} within the macro. | |
433 | |
434 @end deftypefn | |
435 | |
436 @c hex.c:50 | |
437 @deftypefn Extension {unsigned int} hex_value (int @var{c}) | |
438 | |
439 Returns the numeric equivalent of the given character when interpreted | |
440 as a hexadecimal digit. The result is undefined if you pass an | |
441 invalid hex digit. Note that the value you pass will be cast to | |
442 @code{unsigned char} within the macro. | |
443 | |
444 The @code{hex_value} macro returns @code{unsigned int}, rather than | |
445 signed @code{int}, to make it easier to use in parsing addresses from | |
446 hex dump files: a signed @code{int} would be sign-extended when | |
447 converted to a wider unsigned type --- like @code{bfd_vma}, on some | |
448 systems. | |
449 | |
450 @end deftypefn | |
451 | |
452 @c index.c:5 | |
453 @deftypefn Supplemental char* index (char *@var{s}, int @var{c}) | |
454 | |
455 Returns a pointer to the first occurrence of the character @var{c} in | |
456 the string @var{s}, or @code{NULL} if not found. The use of @code{index} is | |
457 deprecated in new programs in favor of @code{strchr}. | |
458 | |
459 @end deftypefn | |
460 | |
461 @c insque.c:6 | |
462 @deftypefn Supplemental void insque (struct qelem *@var{elem}, struct qelem *@var{pred}) | |
463 @deftypefnx Supplemental void remque (struct qelem *@var{elem}) | |
464 | |
465 Routines to manipulate queues built from doubly linked lists. The | |
466 @code{insque} routine inserts @var{elem} in the queue immediately | |
467 after @var{pred}. The @code{remque} routine removes @var{elem} from | |
468 its containing queue. These routines expect to be passed pointers to | |
469 structures which have as their first members a forward pointer and a | |
470 back pointer, like this prototype (although no prototype is provided): | |
471 | |
472 @example | |
473 struct qelem @{ | |
474 struct qelem *q_forw; | |
475 struct qelem *q_back; | |
476 char q_data[]; | |
477 @}; | |
478 @end example | |
479 | |
480 @end deftypefn | |
481 | |
482 @c safe-ctype.c:46 | |
483 @deffn Extension ISALPHA (@var{c}) | |
484 @deffnx Extension ISALNUM (@var{c}) | |
485 @deffnx Extension ISBLANK (@var{c}) | |
486 @deffnx Extension ISCNTRL (@var{c}) | |
487 @deffnx Extension ISDIGIT (@var{c}) | |
488 @deffnx Extension ISGRAPH (@var{c}) | |
489 @deffnx Extension ISLOWER (@var{c}) | |
490 @deffnx Extension ISPRINT (@var{c}) | |
491 @deffnx Extension ISPUNCT (@var{c}) | |
492 @deffnx Extension ISSPACE (@var{c}) | |
493 @deffnx Extension ISUPPER (@var{c}) | |
494 @deffnx Extension ISXDIGIT (@var{c}) | |
495 | |
496 These twelve macros are defined by @file{safe-ctype.h}. Each has the | |
497 same meaning as the corresponding macro (with name in lowercase) | |
498 defined by the standard header @file{ctype.h}. For example, | |
499 @code{ISALPHA} returns true for alphabetic characters and false for | |
500 others. However, there are two differences between these macros and | |
501 those provided by @file{ctype.h}: | |
502 | |
503 @itemize @bullet | |
504 @item These macros are guaranteed to have well-defined behavior for all | |
505 values representable by @code{signed char} and @code{unsigned char}, and | |
506 for @code{EOF}. | |
507 | |
508 @item These macros ignore the current locale; they are true for these | |
509 fixed sets of characters: | |
510 @multitable {@code{XDIGIT}} {yada yada yada yada yada yada yada yada} | |
511 @item @code{ALPHA} @tab @kbd{A-Za-z} | |
512 @item @code{ALNUM} @tab @kbd{A-Za-z0-9} | |
513 @item @code{BLANK} @tab @kbd{space tab} | |
514 @item @code{CNTRL} @tab @code{!PRINT} | |
515 @item @code{DIGIT} @tab @kbd{0-9} | |
516 @item @code{GRAPH} @tab @code{ALNUM || PUNCT} | |
517 @item @code{LOWER} @tab @kbd{a-z} | |
518 @item @code{PRINT} @tab @code{GRAPH ||} @kbd{space} | |
519 @item @code{PUNCT} @tab @kbd{`~!@@#$%^&*()_-=+[@{]@}\|;:'",<.>/?} | |
520 @item @code{SPACE} @tab @kbd{space tab \n \r \f \v} | |
521 @item @code{UPPER} @tab @kbd{A-Z} | |
522 @item @code{XDIGIT} @tab @kbd{0-9A-Fa-f} | |
523 @end multitable | |
524 | |
525 Note that, if the host character set is ASCII or a superset thereof, | |
526 all these macros will return false for all values of @code{char} outside | |
527 the range of 7-bit ASCII. In particular, both ISPRINT and ISCNTRL return | |
528 false for characters with numeric values from 128 to 255. | |
529 @end itemize | |
530 @end deffn | |
531 | |
532 @c safe-ctype.c:95 | |
533 @deffn Extension ISIDNUM (@var{c}) | |
534 @deffnx Extension ISIDST (@var{c}) | |
535 @deffnx Extension IS_VSPACE (@var{c}) | |
536 @deffnx Extension IS_NVSPACE (@var{c}) | |
537 @deffnx Extension IS_SPACE_OR_NUL (@var{c}) | |
538 @deffnx Extension IS_ISOBASIC (@var{c}) | |
539 These six macros are defined by @file{safe-ctype.h} and provide | |
540 additional character classes which are useful when doing lexical | |
541 analysis of C or similar languages. They are true for the following | |
542 sets of characters: | |
543 | |
544 @multitable {@code{SPACE_OR_NUL}} {yada yada yada yada yada yada yada yada} | |
545 @item @code{IDNUM} @tab @kbd{A-Za-z0-9_} | |
546 @item @code{IDST} @tab @kbd{A-Za-z_} | |
547 @item @code{VSPACE} @tab @kbd{\r \n} | |
548 @item @code{NVSPACE} @tab @kbd{space tab \f \v \0} | |
549 @item @code{SPACE_OR_NUL} @tab @code{VSPACE || NVSPACE} | |
550 @item @code{ISOBASIC} @tab @code{VSPACE || NVSPACE || PRINT} | |
551 @end multitable | |
552 @end deffn | |
553 | |
554 @c lbasename.c:23 | |
555 @deftypefn Replacement {const char*} lbasename (const char *@var{name}) | |
556 | |
557 Given a pointer to a string containing a typical pathname | |
558 (@samp{/usr/src/cmd/ls/ls.c} for example), returns a pointer to the | |
559 last component of the pathname (@samp{ls.c} in this case). The | |
560 returned pointer is guaranteed to lie within the original | |
561 string. This latter fact is not true of many vendor C | |
562 libraries, which return special strings or modify the passed | |
563 strings for particular input. | |
564 | |
565 In particular, the empty string returns the same empty string, | |
566 and a path ending in @code{/} returns the empty string after it. | |
567 | |
568 @end deftypefn | |
569 | |
570 @c lrealpath.c:25 | |
571 @deftypefn Replacement {const char*} lrealpath (const char *@var{name}) | |
572 | |
573 Given a pointer to a string containing a pathname, returns a canonical | |
574 version of the filename. Symlinks will be resolved, and ``.'' and ``..'' | |
575 components will be simplified. The returned value will be allocated using | |
576 @code{malloc}, or @code{NULL} will be returned on a memory allocation error. | |
577 | |
578 @end deftypefn | |
579 | |
580 @c make-relative-prefix.c:24 | |
581 @deftypefn Extension {const char*} make_relative_prefix (const char *@var{progname}, const char *@var{bin_prefix}, const char *@var{prefix}) | |
582 | |
583 Given three paths @var{progname}, @var{bin_prefix}, @var{prefix}, | |
584 return the path that is in the same position relative to | |
585 @var{progname}'s directory as @var{prefix} is relative to | |
586 @var{bin_prefix}. That is, a string starting with the directory | |
587 portion of @var{progname}, followed by a relative pathname of the | |
588 difference between @var{bin_prefix} and @var{prefix}. | |
589 | |
590 If @var{progname} does not contain any directory separators, | |
591 @code{make_relative_prefix} will search @env{PATH} to find a program | |
592 named @var{progname}. Also, if @var{progname} is a symbolic link, | |
593 the symbolic link will be resolved. | |
594 | |
595 For example, if @var{bin_prefix} is @code{/alpha/beta/gamma/gcc/delta}, | |
596 @var{prefix} is @code{/alpha/beta/gamma/omega/}, and @var{progname} is | |
597 @code{/red/green/blue/gcc}, then this function will return | |
598 @code{/red/green/blue/../../omega/}. | |
599 | |
600 The return value is normally allocated via @code{malloc}. If no | |
601 relative prefix can be found, return @code{NULL}. | |
602 | |
603 @end deftypefn | |
604 | |
605 @c make-temp-file.c:137 | |
606 @deftypefn Replacement char* make_temp_file (const char *@var{suffix}) | |
607 | |
608 Return a temporary file name (as a string) or @code{NULL} if unable to | |
609 create one. @var{suffix} is a suffix to append to the file name. The | |
610 string is @code{malloc}ed, and the temporary file has been created. | |
611 | |
612 @end deftypefn | |
613 | |
614 @c memchr.c:3 | |
615 @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n}) | |
616 | |
617 This function searches memory starting at @code{*@var{s}} for the | |
618 character @var{c}. The search only ends with the first occurrence of | |
619 @var{c}, or after @var{length} characters; in particular, a null | |
620 character does not terminate the search. If the character @var{c} is | |
621 found within @var{length} characters of @code{*@var{s}}, a pointer | |
622 to the character is returned. If @var{c} is not found, then @code{NULL} is | |
623 returned. | |
624 | |
625 @end deftypefn | |
626 | |
627 @c memcmp.c:6 | |
628 @deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count}) | |
629 | |
630 Compares the first @var{count} bytes of two areas of memory. Returns | |
631 zero if they are the same, a value less than zero if @var{x} is | |
632 lexically less than @var{y}, or a value greater than zero if @var{x} | |
633 is lexically greater than @var{y}. Note that lexical order is determined | |
634 as if comparing unsigned char arrays. | |
635 | |
636 @end deftypefn | |
637 | |
638 @c memcpy.c:6 | |
639 @deftypefn Supplemental void* memcpy (void *@var{out}, const void *@var{in}, size_t @var{length}) | |
640 | |
641 Copies @var{length} bytes from memory region @var{in} to region | |
642 @var{out}. Returns a pointer to @var{out}. | |
643 | |
644 @end deftypefn | |
645 | |
646 @c memmove.c:6 | |
647 @deftypefn Supplemental void* memmove (void *@var{from}, const void *@var{to}, size_t @var{count}) | |
648 | |
649 Copies @var{count} bytes from memory area @var{from} to memory area | |
650 @var{to}, returning a pointer to @var{to}. | |
651 | |
652 @end deftypefn | |
653 | |
654 @c mempcpy.c:23 | |
655 @deftypefn Supplemental void* mempcpy (void *@var{out}, const void *@var{in}, size_t @var{length}) | |
656 | |
657 Copies @var{length} bytes from memory region @var{in} to region | |
658 @var{out}. Returns a pointer to @var{out} + @var{length}. | |
659 | |
660 @end deftypefn | |
661 | |
662 @c memset.c:6 | |
663 @deftypefn Supplemental void* memset (void *@var{s}, int @var{c}, size_t @var{count}) | |
664 | |
665 Sets the first @var{count} bytes of @var{s} to the constant byte | |
666 @var{c}, returning a pointer to @var{s}. | |
667 | |
668 @end deftypefn | |
669 | |
670 @c mkstemps.c:58 | |
671 @deftypefn Replacement int mkstemps (char *@var{pattern}, int @var{suffix_len}) | |
672 | |
673 Generate a unique temporary file name from @var{pattern}. | |
674 @var{pattern} has the form: | |
675 | |
676 @example | |
677 @var{path}/ccXXXXXX@var{suffix} | |
678 @end example | |
679 | |
680 @var{suffix_len} tells us how long @var{suffix} is (it can be zero | |
681 length). The last six characters of @var{pattern} before @var{suffix} | |
682 must be @samp{XXXXXX}; they are replaced with a string that makes the | |
683 filename unique. Returns a file descriptor open on the file for | |
684 reading and writing. | |
685 | |
686 @end deftypefn | |
687 | |
688 @c pexecute.txh:266 | |
689 @deftypefn Extension void pex_free (struct pex_obj @var{obj}) | |
690 | |
691 Clean up and free all data associated with @var{obj}. If you have not | |
692 yet called @code{pex_get_times} or @code{pex_get_status}, this will | |
693 try to kill the subprocesses. | |
694 | |
695 @end deftypefn | |
696 | |
697 @c pexecute.txh:241 | |
698 @deftypefn Extension int pex_get_status (struct pex_obj *@var{obj}, int @var{count}, int *@var{vector}) | |
699 | |
700 Returns the exit status of all programs run using @var{obj}. | |
701 @var{count} is the number of results expected. The results will be | |
702 placed into @var{vector}. The results are in the order of the calls | |
703 to @code{pex_run}. Returns 0 on error, 1 on success. | |
704 | |
705 @end deftypefn | |
706 | |
707 @c pexecute.txh:250 | |
708 @deftypefn Extension int pex_get_times (struct pex_obj *@var{obj}, int @var{count}, struct pex_time *@var{vector}) | |
709 | |
710 Returns the process execution times of all programs run using | |
711 @var{obj}. @var{count} is the number of results expected. The | |
712 results will be placed into @var{vector}. The results are in the | |
713 order of the calls to @code{pex_run}. Returns 0 on error, 1 on | |
714 success. | |
715 | |
716 @code{struct pex_time} has the following fields of the type | |
717 @code{unsigned long}: @code{user_seconds}, | |
718 @code{user_microseconds}, @code{system_seconds}, | |
719 @code{system_microseconds}. On systems which do not support reporting | |
720 process times, all the fields will be set to @code{0}. | |
721 | |
722 @end deftypefn | |
723 | |
724 @c pexecute.txh:2 | |
725 @deftypefn Extension {struct pex_obj *} pex_init (int @var{flags}, const char *@var{pname}, const char *@var{tempbase}) | |
726 | |
727 Prepare to execute one or more programs, with standard output of each | |
728 program fed to standard input of the next. This is a system | |
729 independent interface to execute a pipeline. | |
730 | |
731 @var{flags} is a bitwise combination of the following: | |
732 | |
733 @table @code | |
734 | |
735 @vindex PEX_RECORD_TIMES | |
736 @item PEX_RECORD_TIMES | |
737 Record subprocess times if possible. | |
738 | |
739 @vindex PEX_USE_PIPES | |
740 @item PEX_USE_PIPES | |
741 Use pipes for communication between processes, if possible. | |
742 | |
743 @vindex PEX_SAVE_TEMPS | |
744 @item PEX_SAVE_TEMPS | |
745 Don't delete temporary files used for communication between | |
746 processes. | |
747 | |
748 @end table | |
749 | |
750 @var{pname} is the name of program to be executed, used in error | |
751 messages. @var{tempbase} is a base name to use for any required | |
752 temporary files; it may be @code{NULL} to use a randomly chosen name. | |
753 | |
754 @end deftypefn | |
755 | |
756 @c pexecute.txh:155 | |
757 @deftypefn Extension {FILE *} pex_input_file (struct pex_obj *@var{obj}, int @var{flags}, const char *@var{in_name}) | |
758 | |
759 Return a stream for a temporary file to pass to the first program in | |
760 the pipeline as input. | |
761 | |
762 The name of the input file is chosen according to the same rules | |
763 @code{pex_run} uses to choose output file names, based on | |
764 @var{in_name}, @var{obj} and the @code{PEX_SUFFIX} bit in @var{flags}. | |
765 | |
766 Don't call @code{fclose} on the returned stream; the first call to | |
767 @code{pex_run} closes it automatically. | |
768 | |
769 If @var{flags} includes @code{PEX_BINARY_OUTPUT}, open the stream in | |
770 binary mode; otherwise, open it in the default mode. Including | |
771 @code{PEX_BINARY_OUTPUT} in @var{flags} has no effect on Unix. | |
772 @end deftypefn | |
773 | |
774 @c pexecute.txh:172 | |
775 @deftypefn Extension {FILE *} pex_input_pipe (struct pex_obj *@var{obj}, int @var{binary}) | |
776 | |
777 Return a stream @var{fp} for a pipe connected to the standard input of | |
778 the first program in the pipeline; @var{fp} is opened for writing. | |
779 You must have passed @code{PEX_USE_PIPES} to the @code{pex_init} call | |
780 that returned @var{obj}. | |
781 | |
782 You must close @var{fp} using @code{fclose} yourself when you have | |
783 finished writing data to the pipeline. | |
784 | |
785 The file descriptor underlying @var{fp} is marked not to be inherited | |
786 by child processes. | |
787 | |
788 On systems that do not support pipes, this function returns | |
789 @code{NULL}, and sets @code{errno} to @code{EINVAL}. If you would | |
790 like to write code that is portable to all systems the @code{pex} | |
791 functions support, consider using @code{pex_input_file} instead. | |
792 | |
793 There are two opportunities for deadlock using | |
794 @code{pex_input_pipe}: | |
795 | |
796 @itemize @bullet | |
797 @item | |
798 Most systems' pipes can buffer only a fixed amount of data; a process | |
799 that writes to a full pipe blocks. Thus, if you write to @file{fp} | |
800 before starting the first process, you run the risk of blocking when | |
801 there is no child process yet to read the data and allow you to | |
802 continue. @code{pex_input_pipe} makes no promises about the | |
803 size of the pipe's buffer, so if you need to write any data at all | |
804 before starting the first process in the pipeline, consider using | |
805 @code{pex_input_file} instead. | |
806 | |
807 @item | |
808 Using @code{pex_input_pipe} and @code{pex_read_output} together | |
809 may also cause deadlock. If the output pipe fills up, so that each | |
810 program in the pipeline is waiting for the next to read more data, and | |
811 you fill the input pipe by writing more data to @var{fp}, then there | |
812 is no way to make progress: the only process that could read data from | |
813 the output pipe is you, but you are blocked on the input pipe. | |
814 | |
815 @end itemize | |
816 | |
817 @end deftypefn | |
818 | |
819 @c pexecute.txh:274 | |
820 @deftypefn Extension {const char *} pex_one (int @var{flags}, const char *@var{executable}, char * const *@var{argv}, const char *@var{pname}, const char *@var{outname}, const char *@var{errname}, int *@var{status}, int *@var{err}) | |
821 | |
822 An interface to permit the easy execution of a | |
823 single program. The return value and most of the parameters are as | |
824 for a call to @code{pex_run}. @var{flags} is restricted to a | |
825 combination of @code{PEX_SEARCH}, @code{PEX_STDERR_TO_STDOUT}, and | |
826 @code{PEX_BINARY_OUTPUT}. @var{outname} is interpreted as if | |
827 @code{PEX_LAST} were set. On a successful return, @code{*@var{status}} will | |
828 be set to the exit status of the program. | |
829 | |
830 @end deftypefn | |
831 | |
832 @c pexecute.txh:228 | |
833 @deftypefn Extension {FILE *} pex_read_err (struct pex_obj *@var{obj}, int @var{binary}) | |
834 | |
835 Returns a @code{FILE} pointer which may be used to read the standard | |
836 error of the last program in the pipeline. When this is used, | |
837 @code{PEX_LAST} should not be used in a call to @code{pex_run}. After | |
838 this is called, @code{pex_run} may no longer be called with the same | |
839 @var{obj}. @var{binary} should be non-zero if the file should be | |
840 opened in binary mode. Don't call @code{fclose} on the returned file; | |
841 it will be closed by @code{pex_free}. | |
842 | |
843 @end deftypefn | |
844 | |
845 @c pexecute.txh:216 | |
846 @deftypefn Extension {FILE *} pex_read_output (struct pex_obj *@var{obj}, int @var{binary}) | |
847 | |
848 Returns a @code{FILE} pointer which may be used to read the standard | |
849 output of the last program in the pipeline. When this is used, | |
850 @code{PEX_LAST} should not be used in a call to @code{pex_run}. After | |
851 this is called, @code{pex_run} may no longer be called with the same | |
852 @var{obj}. @var{binary} should be non-zero if the file should be | |
853 opened in binary mode. Don't call @code{fclose} on the returned file; | |
854 it will be closed by @code{pex_free}. | |
855 | |
856 @end deftypefn | |
857 | |
858 @c pexecute.txh:33 | |
859 @deftypefn Extension {const char *} pex_run (struct pex_obj *@var{obj}, int @var{flags}, const char *@var{executable}, char * const *@var{argv}, const char *@var{outname}, const char *@var{errname}, int *@var{err}) | |
860 | |
861 Execute one program in a pipeline. On success this returns | |
862 @code{NULL}. On failure it returns an error message, a statically | |
863 allocated string. | |
864 | |
865 @var{obj} is returned by a previous call to @code{pex_init}. | |
866 | |
867 @var{flags} is a bitwise combination of the following: | |
868 | |
869 @table @code | |
870 | |
871 @vindex PEX_LAST | |
872 @item PEX_LAST | |
873 This must be set on the last program in the pipeline. In particular, | |
874 it should be set when executing a single program. The standard output | |
875 of the program will be sent to @var{outname}, or, if @var{outname} is | |
876 @code{NULL}, to the standard output of the calling program. Do @emph{not} | |
877 set this bit if you want to call @code{pex_read_output} | |
878 (described below). After a call to @code{pex_run} with this bit set, | |
879 @var{pex_run} may no longer be called with the same @var{obj}. | |
880 | |
881 @vindex PEX_SEARCH | |
882 @item PEX_SEARCH | |
883 Search for the program using the user's executable search path. | |
884 | |
885 @vindex PEX_SUFFIX | |
886 @item PEX_SUFFIX | |
887 @var{outname} is a suffix. See the description of @var{outname}, | |
888 below. | |
889 | |
890 @vindex PEX_STDERR_TO_STDOUT | |
891 @item PEX_STDERR_TO_STDOUT | |
892 Send the program's standard error to standard output, if possible. | |
893 | |
894 @vindex PEX_BINARY_INPUT | |
895 @vindex PEX_BINARY_OUTPUT | |
896 @vindex PEX_BINARY_ERROR | |
897 @item PEX_BINARY_INPUT | |
898 @itemx PEX_BINARY_OUTPUT | |
899 @itemx PEX_BINARY_ERROR | |
900 The standard input (output or error) of the program should be read (written) in | |
901 binary mode rather than text mode. These flags are ignored on systems | |
902 which do not distinguish binary mode and text mode, such as Unix. For | |
903 proper behavior these flags should match appropriately---a call to | |
904 @code{pex_run} using @code{PEX_BINARY_OUTPUT} should be followed by a | |
905 call using @code{PEX_BINARY_INPUT}. | |
906 | |
907 @vindex PEX_STDERR_TO_PIPE | |
908 @item PEX_STDERR_TO_PIPE | |
909 Send the program's standard error to a pipe, if possible. This flag | |
910 cannot be specified together with @code{PEX_STDERR_TO_STDOUT}. This | |
911 flag can be specified only on the last program in pipeline. | |
912 | |
913 @end table | |
914 | |
915 @var{executable} is the program to execute. @var{argv} is the set of | |
916 arguments to pass to the program; normally @code{@var{argv}[0]} will | |
917 be a copy of @var{executable}. | |
918 | |
919 @var{outname} is used to set the name of the file to use for standard | |
920 output. There are two cases in which no output file will be used: | |
921 | |
922 @enumerate | |
923 @item | |
924 if @code{PEX_LAST} is not set in @var{flags}, and @code{PEX_USE_PIPES} | |
925 was set in the call to @code{pex_init}, and the system supports pipes | |
926 | |
927 @item | |
928 if @code{PEX_LAST} is set in @var{flags}, and @var{outname} is | |
929 @code{NULL} | |
930 @end enumerate | |
931 | |
932 @noindent | |
933 Otherwise the code will use a file to hold standard | |
934 output. If @code{PEX_LAST} is not set, this file is considered to be | |
935 a temporary file, and it will be removed when no longer needed, unless | |
936 @code{PEX_SAVE_TEMPS} was set in the call to @code{pex_init}. | |
937 | |
938 There are two cases to consider when setting the name of the file to | |
939 hold standard output. | |
940 | |
941 @enumerate | |
942 @item | |
943 @code{PEX_SUFFIX} is set in @var{flags}. In this case | |
944 @var{outname} may not be @code{NULL}. If the @var{tempbase} parameter | |
945 to @code{pex_init} was not @code{NULL}, then the output file name is | |
946 the concatenation of @var{tempbase} and @var{outname}. If | |
947 @var{tempbase} was @code{NULL}, then the output file name is a random | |
948 file name ending in @var{outname}. | |
949 | |
950 @item | |
951 @code{PEX_SUFFIX} was not set in @var{flags}. In this | |
952 case, if @var{outname} is not @code{NULL}, it is used as the output | |
953 file name. If @var{outname} is @code{NULL}, and @var{tempbase} was | |
954 not NULL, the output file name is randomly chosen using | |
955 @var{tempbase}. Otherwise the output file name is chosen completely | |
956 at random. | |
957 @end enumerate | |
958 | |
959 @var{errname} is the file name to use for standard error output. If | |
960 it is @code{NULL}, standard error is the same as the caller's. | |
961 Otherwise, standard error is written to the named file. | |
962 | |
963 On an error return, the code sets @code{*@var{err}} to an @code{errno} | |
964 value, or to 0 if there is no relevant @code{errno}. | |
965 | |
966 @end deftypefn | |
967 | |
968 @c pexecute.txh:142 | |
969 @deftypefn Extension {const char *} pex_run_in_environment (struct pex_obj *@var{obj}, int @var{flags}, const char *@var{executable}, char * const *@var{argv}, char * const *@var{env}, int @var{env_size}, const char *@var{outname}, const char *@var{errname}, int *@var{err}) | |
970 | |
971 Execute one program in a pipeline, permitting the environment for the | |
972 program to be specified. Behaviour and parameters not listed below are | |
973 as for @code{pex_run}. | |
974 | |
975 @var{env} is the environment for the child process, specified as an array of | |
976 character pointers. Each element of the array should point to a string of the | |
977 form @code{VAR=VALUE}, with the exception of the last element that must be | |
978 @code{NULL}. | |
979 | |
980 @end deftypefn | |
981 | |
982 @c pexecute.txh:286 | |
983 @deftypefn Extension int pexecute (const char *@var{program}, char * const *@var{argv}, const char *@var{this_pname}, const char *@var{temp_base}, char **@var{errmsg_fmt}, char **@var{errmsg_arg}, int @var{flags}) | |
984 | |
985 This is the old interface to execute one or more programs. It is | |
986 still supported for compatibility purposes, but is no longer | |
987 documented. | |
988 | |
989 @end deftypefn | |
990 | |
991 @c strsignal.c:541 | |
992 @deftypefn Supplemental void psignal (int @var{signo}, char *@var{message}) | |
993 | |
994 Print @var{message} to the standard error, followed by a colon, | |
995 followed by the description of the signal specified by @var{signo}, | |
996 followed by a newline. | |
997 | |
998 @end deftypefn | |
999 | |
1000 @c putenv.c:21 | |
1001 @deftypefn Supplemental int putenv (const char *@var{string}) | |
1002 | |
1003 Uses @code{setenv} or @code{unsetenv} to put @var{string} into | |
1004 the environment or remove it. If @var{string} is of the form | |
1005 @samp{name=value} the string is added; if no @samp{=} is present the | |
1006 name is unset/removed. | |
1007 | |
1008 @end deftypefn | |
1009 | |
1010 @c pexecute.txh:294 | |
1011 @deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags}) | |
1012 | |
1013 Another part of the old execution interface. | |
1014 | |
1015 @end deftypefn | |
1016 | |
1017 @c random.c:39 | |
1018 @deftypefn Supplement {long int} random (void) | |
1019 @deftypefnx Supplement void srandom (unsigned int @var{seed}) | |
1020 @deftypefnx Supplement void* initstate (unsigned int @var{seed}, void *@var{arg_state}, unsigned long @var{n}) | |
1021 @deftypefnx Supplement void* setstate (void *@var{arg_state}) | |
1022 | |
1023 Random number functions. @code{random} returns a random number in the | |
1024 range 0 to @code{LONG_MAX}. @code{srandom} initializes the random | |
1025 number generator to some starting point determined by @var{seed} | |
1026 (else, the values returned by @code{random} are always the same for each | |
1027 run of the program). @code{initstate} and @code{setstate} allow fine-grained | |
1028 control over the state of the random number generator. | |
1029 | |
1030 @end deftypefn | |
1031 | |
1032 @c concat.c:173 | |
1033 @deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @dots{}, @code{NULL}) | |
1034 | |
1035 Same as @code{concat}, except that if @var{optr} is not @code{NULL} it | |
1036 is freed after the string is created. This is intended to be useful | |
1037 when you're extending an existing string or building up a string in a | |
1038 loop: | |
1039 | |
1040 @example | |
1041 str = reconcat (str, "pre-", str, NULL); | |
1042 @end example | |
1043 | |
1044 @end deftypefn | |
1045 | |
1046 @c rename.c:6 | |
1047 @deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new}) | |
1048 | |
1049 Renames a file from @var{old} to @var{new}. If @var{new} already | |
1050 exists, it is removed. | |
1051 | |
1052 @end deftypefn | |
1053 | |
1054 @c rindex.c:5 | |
1055 @deftypefn Supplemental char* rindex (const char *@var{s}, int @var{c}) | |
1056 | |
1057 Returns a pointer to the last occurrence of the character @var{c} in | |
1058 the string @var{s}, or @code{NULL} if not found. The use of @code{rindex} is | |
1059 deprecated in new programs in favor of @code{strrchr}. | |
1060 | |
1061 @end deftypefn | |
1062 | |
1063 @c setenv.c:22 | |
1064 @deftypefn Supplemental int setenv (const char *@var{name}, const char *@var{value}, int @var{overwrite}) | |
1065 @deftypefnx Supplemental void unsetenv (const char *@var{name}) | |
1066 | |
1067 @code{setenv} adds @var{name} to the environment with value | |
1068 @var{value}. If the name was already present in the environment, | |
1069 the new value will be stored only if @var{overwrite} is nonzero. | |
1070 The companion @code{unsetenv} function removes @var{name} from the | |
1071 environment. This implementation is not safe for multithreaded code. | |
1072 | |
1073 @end deftypefn | |
1074 | |
1075 @c strsignal.c:348 | |
1076 @deftypefn Extension int signo_max (void) | |
1077 | |
1078 Returns the maximum signal value for which a corresponding symbolic | |
1079 name or message is available. Note that in the case where we use the | |
1080 @code{sys_siglist} supplied by the system, it is possible for there to | |
1081 be more symbolic names than messages, or vice versa. In fact, the | |
1082 manual page for @code{psignal(3b)} explicitly warns that one should | |
1083 check the size of the table (@code{NSIG}) before indexing it, since | |
1084 new signal codes may be added to the system before they are added to | |
1085 the table. Thus @code{NSIG} might be smaller than value implied by | |
1086 the largest signo value defined in @code{<signal.h>}. | |
1087 | |
1088 We return the maximum value that can be used to obtain a meaningful | |
1089 symbolic name or message. | |
1090 | |
1091 @end deftypefn | |
1092 | |
1093 @c sigsetmask.c:8 | |
1094 @deftypefn Supplemental int sigsetmask (int @var{set}) | |
1095 | |
1096 Sets the signal mask to the one provided in @var{set} and returns | |
1097 the old mask (which, for libiberty's implementation, will always | |
1098 be the value @code{1}). | |
1099 | |
1100 @end deftypefn | |
1101 | |
1102 @c snprintf.c:28 | |
1103 @deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, ...) | |
1104 | |
1105 This function is similar to sprintf, but it will print at most @var{n} | |
1106 characters. On error the return value is -1, otherwise it returns the | |
1107 number of characters that would have been printed had @var{n} been | |
1108 sufficiently large, regardless of the actual value of @var{n}. Note | |
1109 some pre-C99 system libraries do not implement this correctly so users | |
1110 cannot generally rely on the return value if the system version of | |
1111 this function is used. | |
1112 | |
1113 @end deftypefn | |
1114 | |
1115 @c spaces.c:22 | |
1116 @deftypefn Extension char* spaces (int @var{count}) | |
1117 | |
1118 Returns a pointer to a memory region filled with the specified | |
1119 number of spaces and null terminated. The returned pointer is | |
1120 valid until at least the next call. | |
1121 | |
1122 @end deftypefn | |
1123 | |
1124 @c stpcpy.c:23 | |
1125 @deftypefn Supplemental char* stpcpy (char *@var{dst}, const char *@var{src}) | |
1126 | |
1127 Copies the string @var{src} into @var{dst}. Returns a pointer to | |
1128 @var{dst} + strlen(@var{src}). | |
1129 | |
1130 @end deftypefn | |
1131 | |
1132 @c stpncpy.c:23 | |
1133 @deftypefn Supplemental char* stpncpy (char *@var{dst}, const char *@var{src}, size_t @var{len}) | |
1134 | |
1135 Copies the string @var{src} into @var{dst}, copying exactly @var{len} | |
1136 and padding with zeros if necessary. If @var{len} < strlen(@var{src}) | |
1137 then return @var{dst} + @var{len}, otherwise returns @var{dst} + | |
1138 strlen(@var{src}). | |
1139 | |
1140 @end deftypefn | |
1141 | |
1142 @c strcasecmp.c:15 | |
1143 @deftypefn Supplemental int strcasecmp (const char *@var{s1}, const char *@var{s2}) | |
1144 | |
1145 A case-insensitive @code{strcmp}. | |
1146 | |
1147 @end deftypefn | |
1148 | |
1149 @c strchr.c:6 | |
1150 @deftypefn Supplemental char* strchr (const char *@var{s}, int @var{c}) | |
1151 | |
1152 Returns a pointer to the first occurrence of the character @var{c} in | |
1153 the string @var{s}, or @code{NULL} if not found. If @var{c} is itself the | |
1154 null character, the results are undefined. | |
1155 | |
1156 @end deftypefn | |
1157 | |
1158 @c strdup.c:3 | |
1159 @deftypefn Supplemental char* strdup (const char *@var{s}) | |
1160 | |
1161 Returns a pointer to a copy of @var{s} in memory obtained from | |
1162 @code{malloc}, or @code{NULL} if insufficient memory was available. | |
1163 | |
1164 @end deftypefn | |
1165 | |
1166 @c strerror.c:670 | |
1167 @deftypefn Replacement {const char*} strerrno (int @var{errnum}) | |
1168 | |
1169 Given an error number returned from a system call (typically returned | |
1170 in @code{errno}), returns a pointer to a string containing the | |
1171 symbolic name of that error number, as found in @code{<errno.h>}. | |
1172 | |
1173 If the supplied error number is within the valid range of indices for | |
1174 symbolic names, but no name is available for the particular error | |
1175 number, then returns the string @samp{Error @var{num}}, where @var{num} | |
1176 is the error number. | |
1177 | |
1178 If the supplied error number is not within the range of valid | |
1179 indices, then returns @code{NULL}. | |
1180 | |
1181 The contents of the location pointed to are only guaranteed to be | |
1182 valid until the next call to @code{strerrno}. | |
1183 | |
1184 @end deftypefn | |
1185 | |
1186 @c strerror.c:603 | |
1187 @deftypefn Supplemental char* strerror (int @var{errnoval}) | |
1188 | |
1189 Maps an @code{errno} number to an error message string, the contents | |
1190 of which are implementation defined. On systems which have the | |
1191 external variables @code{sys_nerr} and @code{sys_errlist}, these | |
1192 strings will be the same as the ones used by @code{perror}. | |
1193 | |
1194 If the supplied error number is within the valid range of indices for | |
1195 the @code{sys_errlist}, but no message is available for the particular | |
1196 error number, then returns the string @samp{Error @var{num}}, where | |
1197 @var{num} is the error number. | |
1198 | |
1199 If the supplied error number is not a valid index into | |
1200 @code{sys_errlist}, returns @code{NULL}. | |
1201 | |
1202 The returned string is only guaranteed to be valid only until the | |
1203 next call to @code{strerror}. | |
1204 | |
1205 @end deftypefn | |
1206 | |
1207 @c strncasecmp.c:15 | |
1208 @deftypefn Supplemental int strncasecmp (const char *@var{s1}, const char *@var{s2}) | |
1209 | |
1210 A case-insensitive @code{strncmp}. | |
1211 | |
1212 @end deftypefn | |
1213 | |
1214 @c strncmp.c:6 | |
1215 @deftypefn Supplemental int strncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n}) | |
1216 | |
1217 Compares the first @var{n} bytes of two strings, returning a value as | |
1218 @code{strcmp}. | |
1219 | |
1220 @end deftypefn | |
1221 | |
1222 @c strndup.c:23 | |
1223 @deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n}) | |
1224 | |
1225 Returns a pointer to a copy of @var{s} with at most @var{n} characters | |
1226 in memory obtained from @code{malloc}, or @code{NULL} if insufficient | |
1227 memory was available. The result is always NUL terminated. | |
1228 | |
1229 @end deftypefn | |
1230 | |
1231 @c strrchr.c:6 | |
1232 @deftypefn Supplemental char* strrchr (const char *@var{s}, int @var{c}) | |
1233 | |
1234 Returns a pointer to the last occurrence of the character @var{c} in | |
1235 the string @var{s}, or @code{NULL} if not found. If @var{c} is itself the | |
1236 null character, the results are undefined. | |
1237 | |
1238 @end deftypefn | |
1239 | |
1240 @c strsignal.c:383 | |
1241 @deftypefn Supplemental {const char *} strsignal (int @var{signo}) | |
1242 | |
1243 Maps an signal number to an signal message string, the contents of | |
1244 which are implementation defined. On systems which have the external | |
1245 variable @code{sys_siglist}, these strings will be the same as the | |
1246 ones used by @code{psignal()}. | |
1247 | |
1248 If the supplied signal number is within the valid range of indices for | |
1249 the @code{sys_siglist}, but no message is available for the particular | |
1250 signal number, then returns the string @samp{Signal @var{num}}, where | |
1251 @var{num} is the signal number. | |
1252 | |
1253 If the supplied signal number is not a valid index into | |
1254 @code{sys_siglist}, returns @code{NULL}. | |
1255 | |
1256 The returned string is only guaranteed to be valid only until the next | |
1257 call to @code{strsignal}. | |
1258 | |
1259 @end deftypefn | |
1260 | |
1261 @c strsignal.c:448 | |
1262 @deftypefn Extension {const char*} strsigno (int @var{signo}) | |
1263 | |
1264 Given an signal number, returns a pointer to a string containing the | |
1265 symbolic name of that signal number, as found in @code{<signal.h>}. | |
1266 | |
1267 If the supplied signal number is within the valid range of indices for | |
1268 symbolic names, but no name is available for the particular signal | |
1269 number, then returns the string @samp{Signal @var{num}}, where | |
1270 @var{num} is the signal number. | |
1271 | |
1272 If the supplied signal number is not within the range of valid | |
1273 indices, then returns @code{NULL}. | |
1274 | |
1275 The contents of the location pointed to are only guaranteed to be | |
1276 valid until the next call to @code{strsigno}. | |
1277 | |
1278 @end deftypefn | |
1279 | |
1280 @c strstr.c:6 | |
1281 @deftypefn Supplemental char* strstr (const char *@var{string}, const char *@var{sub}) | |
1282 | |
1283 This function searches for the substring @var{sub} in the string | |
1284 @var{string}, not including the terminating null characters. A pointer | |
1285 to the first occurrence of @var{sub} is returned, or @code{NULL} if the | |
1286 substring is absent. If @var{sub} points to a string with zero | |
1287 length, the function returns @var{string}. | |
1288 | |
1289 @end deftypefn | |
1290 | |
1291 @c strtod.c:27 | |
1292 @deftypefn Supplemental double strtod (const char *@var{string}, char **@var{endptr}) | |
1293 | |
1294 This ISO C function converts the initial portion of @var{string} to a | |
1295 @code{double}. If @var{endptr} is not @code{NULL}, a pointer to the | |
1296 character after the last character used in the conversion is stored in | |
1297 the location referenced by @var{endptr}. If no conversion is | |
1298 performed, zero is returned and the value of @var{string} is stored in | |
1299 the location referenced by @var{endptr}. | |
1300 | |
1301 @end deftypefn | |
1302 | |
1303 @c strerror.c:729 | |
1304 @deftypefn Extension int strtoerrno (const char *@var{name}) | |
1305 | |
1306 Given the symbolic name of a error number (e.g., @code{EACCES}), map it | |
1307 to an errno value. If no translation is found, returns 0. | |
1308 | |
1309 @end deftypefn | |
1310 | |
1311 @c strtol.c:33 | |
1312 @deftypefn Supplemental {long int} strtol (const char *@var{string}, char **@var{endptr}, int @var{base}) | |
1313 @deftypefnx Supplemental {unsigned long int} strtoul (const char *@var{string}, char **@var{endptr}, int @var{base}) | |
1314 | |
1315 The @code{strtol} function converts the string in @var{string} to a | |
1316 long integer value according to the given @var{base}, which must be | |
1317 between 2 and 36 inclusive, or be the special value 0. If @var{base} | |
1318 is 0, @code{strtol} will look for the prefixes @code{0} and @code{0x} | |
1319 to indicate bases 8 and 16, respectively, else default to base 10. | |
1320 When the base is 16 (either explicitly or implicitly), a prefix of | |
1321 @code{0x} is allowed. The handling of @var{endptr} is as that of | |
1322 @code{strtod} above. The @code{strtoul} function is the same, except | |
1323 that the converted value is unsigned. | |
1324 | |
1325 @end deftypefn | |
1326 | |
1327 @c strsignal.c:502 | |
1328 @deftypefn Extension int strtosigno (const char *@var{name}) | |
1329 | |
1330 Given the symbolic name of a signal, map it to a signal number. If no | |
1331 translation is found, returns 0. | |
1332 | |
1333 @end deftypefn | |
1334 | |
1335 @c strverscmp.c:25 | |
1336 @deftypefun int strverscmp (const char *@var{s1}, const char *@var{s2}) | |
1337 The @code{strverscmp} function compares the string @var{s1} against | |
1338 @var{s2}, considering them as holding indices/version numbers. Return | |
1339 value follows the same conventions as found in the @code{strverscmp} | |
1340 function. In fact, if @var{s1} and @var{s2} contain no digits, | |
1341 @code{strverscmp} behaves like @code{strcmp}. | |
1342 | |
1343 Basically, we compare strings normally (character by character), until | |
1344 we find a digit in each string - then we enter a special comparison | |
1345 mode, where each sequence of digits is taken as a whole. If we reach the | |
1346 end of these two parts without noticing a difference, we return to the | |
1347 standard comparison mode. There are two types of numeric parts: | |
1348 "integral" and "fractional" (those begin with a '0'). The types | |
1349 of the numeric parts affect the way we sort them: | |
1350 | |
1351 @itemize @bullet | |
1352 @item | |
1353 integral/integral: we compare values as you would expect. | |
1354 | |
1355 @item | |
1356 fractional/integral: the fractional part is less than the integral one. | |
1357 Again, no surprise. | |
1358 | |
1359 @item | |
1360 fractional/fractional: the things become a bit more complex. | |
1361 If the common prefix contains only leading zeroes, the longest part is less | |
1362 than the other one; else the comparison behaves normally. | |
1363 @end itemize | |
1364 | |
1365 @smallexample | |
1366 strverscmp ("no digit", "no digit") | |
1367 @result{} 0 // @r{same behavior as strcmp.} | |
1368 strverscmp ("item#99", "item#100") | |
1369 @result{} <0 // @r{same prefix, but 99 < 100.} | |
1370 strverscmp ("alpha1", "alpha001") | |
1371 @result{} >0 // @r{fractional part inferior to integral one.} | |
1372 strverscmp ("part1_f012", "part1_f01") | |
1373 @result{} >0 // @r{two fractional parts.} | |
1374 strverscmp ("foo.009", "foo.0") | |
1375 @result{} <0 // @r{idem, but with leading zeroes only.} | |
1376 @end smallexample | |
1377 | |
1378 This function is especially useful when dealing with filename sorting, | |
1379 because filenames frequently hold indices/version numbers. | |
1380 @end deftypefun | |
1381 | |
1382 @c tmpnam.c:3 | |
1383 @deftypefn Supplemental char* tmpnam (char *@var{s}) | |
1384 | |
1385 This function attempts to create a name for a temporary file, which | |
1386 will be a valid file name yet not exist when @code{tmpnam} checks for | |
1387 it. @var{s} must point to a buffer of at least @code{L_tmpnam} bytes, | |
1388 or be @code{NULL}. Use of this function creates a security risk, and it must | |
1389 not be used in new projects. Use @code{mkstemp} instead. | |
1390 | |
1391 @end deftypefn | |
1392 | |
1393 @c unlink-if-ordinary.c:27 | |
1394 @deftypefn Supplemental int unlink_if_ordinary (const char*) | |
1395 | |
1396 Unlinks the named file, unless it is special (e.g. a device file). | |
1397 Returns 0 when the file was unlinked, a negative value (and errno set) when | |
1398 there was an error deleting the file, and a positive value if no attempt | |
1399 was made to unlink the file because it is special. | |
1400 | |
1401 @end deftypefn | |
1402 | |
1403 @c fopen_unlocked.c:31 | |
1404 @deftypefn Extension void unlock_std_streams (void) | |
1405 | |
1406 If the OS supports it, ensure that the standard I/O streams, | |
1407 @code{stdin}, @code{stdout} and @code{stderr} are setup to avoid any | |
1408 multi-threaded locking. Otherwise do nothing. | |
1409 | |
1410 @end deftypefn | |
1411 | |
1412 @c fopen_unlocked.c:23 | |
1413 @deftypefn Extension void unlock_stream (FILE * @var{stream}) | |
1414 | |
1415 If the OS supports it, ensure that the supplied stream is setup to | |
1416 avoid any multi-threaded locking. Otherwise leave the @code{FILE} | |
1417 pointer unchanged. If the @var{stream} is @code{NULL} do nothing. | |
1418 | |
1419 @end deftypefn | |
1420 | |
1421 @c vasprintf.c:47 | |
1422 @deftypefn Extension int vasprintf (char **@var{resptr}, const char *@var{format}, va_list @var{args}) | |
1423 | |
1424 Like @code{vsprintf}, but instead of passing a pointer to a buffer, | |
1425 you pass a pointer to a pointer. This function will compute the size | |
1426 of the buffer needed, allocate memory with @code{malloc}, and store a | |
1427 pointer to the allocated memory in @code{*@var{resptr}}. The value | |
1428 returned is the same as @code{vsprintf} would return. If memory could | |
1429 not be allocated, minus one is returned and @code{NULL} is stored in | |
1430 @code{*@var{resptr}}. | |
1431 | |
1432 @end deftypefn | |
1433 | |
1434 @c vfork.c:6 | |
1435 @deftypefn Supplemental int vfork (void) | |
1436 | |
1437 Emulates @code{vfork} by calling @code{fork} and returning its value. | |
1438 | |
1439 @end deftypefn | |
1440 | |
1441 @c vprintf.c:3 | |
1442 @deftypefn Supplemental int vprintf (const char *@var{format}, va_list @var{ap}) | |
1443 @deftypefnx Supplemental int vfprintf (FILE *@var{stream}, const char *@var{format}, va_list @var{ap}) | |
1444 @deftypefnx Supplemental int vsprintf (char *@var{str}, const char *@var{format}, va_list @var{ap}) | |
1445 | |
1446 These functions are the same as @code{printf}, @code{fprintf}, and | |
1447 @code{sprintf}, respectively, except that they are called with a | |
1448 @code{va_list} instead of a variable number of arguments. Note that | |
1449 they do not call @code{va_end}; this is the application's | |
1450 responsibility. In @libib{} they are implemented in terms of the | |
1451 nonstandard but common function @code{_doprnt}. | |
1452 | |
1453 @end deftypefn | |
1454 | |
1455 @c vsnprintf.c:28 | |
1456 @deftypefn Supplemental int vsnprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, va_list @var{ap}) | |
1457 | |
1458 This function is similar to vsprintf, but it will print at most | |
1459 @var{n} characters. On error the return value is -1, otherwise it | |
1460 returns the number of characters that would have been printed had | |
1461 @var{n} been sufficiently large, regardless of the actual value of | |
1462 @var{n}. Note some pre-C99 system libraries do not implement this | |
1463 correctly so users cannot generally rely on the return value if the | |
1464 system version of this function is used. | |
1465 | |
1466 @end deftypefn | |
1467 | |
1468 @c waitpid.c:3 | |
1469 @deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int) | |
1470 | |
1471 This is a wrapper around the @code{wait} function. Any ``special'' | |
1472 values of @var{pid} depend on your implementation of @code{wait}, as | |
1473 does the return value. The third argument is unused in @libib{}. | |
1474 | |
1475 @end deftypefn | |
1476 | |
1477 @c argv.c:293 | |
1478 @deftypefn Extension int writeargv (const char **@var{argv}, FILE *@var{file}) | |
1479 | |
1480 Write each member of ARGV, handling all necessary quoting, to the file | |
1481 named by FILE, separated by whitespace. Return 0 on success, non-zero | |
1482 if an error occurred while writing to FILE. | |
1483 | |
1484 @end deftypefn | |
1485 | |
1486 @c xatexit.c:11 | |
1487 @deftypefun int xatexit (void (*@var{fn}) (void)) | |
1488 | |
1489 Behaves as the standard @code{atexit} function, but with no limit on | |
1490 the number of registered functions. Returns 0 on success, or @minus{}1 on | |
1491 failure. If you use @code{xatexit} to register functions, you must use | |
1492 @code{xexit} to terminate your program. | |
1493 | |
1494 @end deftypefun | |
1495 | |
1496 @c xmalloc.c:38 | |
1497 @deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize}) | |
1498 | |
1499 Allocate memory without fail, and set it to zero. This routine functions | |
1500 like @code{calloc}, but will behave the same as @code{xmalloc} if memory | |
1501 cannot be found. | |
1502 | |
1503 @end deftypefn | |
1504 | |
1505 @c xexit.c:22 | |
1506 @deftypefn Replacement void xexit (int @var{code}) | |
1507 | |
1508 Terminates the program. If any functions have been registered with | |
1509 the @code{xatexit} replacement function, they will be called first. | |
1510 Termination is handled via the system's normal @code{exit} call. | |
1511 | |
1512 @end deftypefn | |
1513 | |
1514 @c xmalloc.c:22 | |
1515 @deftypefn Replacement void* xmalloc (size_t) | |
1516 | |
1517 Allocate memory without fail. If @code{malloc} fails, this will print | |
1518 a message to @code{stderr} (using the name set by | |
1519 @code{xmalloc_set_program_name}, | |
1520 if any) and then call @code{xexit}. Note that it is therefore safe for | |
1521 a program to contain @code{#define malloc xmalloc} in its source. | |
1522 | |
1523 @end deftypefn | |
1524 | |
1525 @c xmalloc.c:53 | |
1526 @deftypefn Replacement void xmalloc_failed (size_t) | |
1527 | |
1528 This function is not meant to be called by client code, and is listed | |
1529 here for completeness only. If any of the allocation routines fail, this | |
1530 function will be called to print an error message and terminate execution. | |
1531 | |
1532 @end deftypefn | |
1533 | |
1534 @c xmalloc.c:46 | |
1535 @deftypefn Replacement void xmalloc_set_program_name (const char *@var{name}) | |
1536 | |
1537 You can use this to set the name of the program used by | |
1538 @code{xmalloc_failed} when printing a failure message. | |
1539 | |
1540 @end deftypefn | |
1541 | |
1542 @c xmemdup.c:7 | |
1543 @deftypefn Replacement void* xmemdup (void *@var{input}, size_t @var{copy_size}, size_t @var{alloc_size}) | |
1544 | |
1545 Duplicates a region of memory without fail. First, @var{alloc_size} bytes | |
1546 are allocated, then @var{copy_size} bytes from @var{input} are copied into | |
1547 it, and the new memory is returned. If fewer bytes are copied than were | |
1548 allocated, the remaining memory is zeroed. | |
1549 | |
1550 @end deftypefn | |
1551 | |
1552 @c xmalloc.c:32 | |
1553 @deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size}) | |
1554 Reallocate memory without fail. This routine functions like @code{realloc}, | |
1555 but will behave the same as @code{xmalloc} if memory cannot be found. | |
1556 | |
1557 @end deftypefn | |
1558 | |
1559 @c xstrdup.c:7 | |
1560 @deftypefn Replacement char* xstrdup (const char *@var{s}) | |
1561 | |
1562 Duplicates a character string without fail, using @code{xmalloc} to | |
1563 obtain memory. | |
1564 | |
1565 @end deftypefn | |
1566 | |
1567 @c xstrerror.c:7 | |
1568 @deftypefn Replacement char* xstrerror (int @var{errnum}) | |
1569 | |
1570 Behaves exactly like the standard @code{strerror} function, but | |
1571 will never return a @code{NULL} pointer. | |
1572 | |
1573 @end deftypefn | |
1574 | |
1575 @c xstrndup.c:23 | |
1576 @deftypefn Replacement char* xstrndup (const char *@var{s}, size_t @var{n}) | |
1577 | |
1578 Returns a pointer to a copy of @var{s} with at most @var{n} characters | |
1579 without fail, using @code{xmalloc} to obtain memory. The result is | |
1580 always NUL terminated. | |
1581 | |
1582 @end deftypefn | |
1583 | |
1584 |