summaryrefslogtreecommitdiff
path: root/lib/libc/stdio/snprintf.c
Commit message (Collapse)AuthorAgeFilesLines
* Renumber clauses to reduce diffs to other versionsEd Maste2013-04-231-1/+1
| | | | | | | | | | NetBSD, OpenBSD, and Android's Bionic all number the clauses 1 through 3, so follow suit to make comparison easier. Acked-by: imp@ Notes: svn path=/head/; revision=249808
* If the size passed to {,v}s{w,n}printf is larger than INT_MAX+1David Schultz2012-04-211-4/+11
| | | | | | | | | | | | | | | | | | | | (i.e., the return value would overflow), set errno to EOVERFLOW and return an error. This improves the chances that buggy applications -- for instance, ones that pass in a negative integer as the size due to a bogus calculation -- will fail in safe ways. Returning an error in these situations is specified by POSIX, but POSIX appears to have an off-by-one error that isn't duplicated in this change. Previously, some of these functions would silently cap the size at INT_MAX+1, and others would exit with an error after writing more than INT_MAX characters. PR: 39256 MFC after: 2 weeks Notes: svn path=/head/; revision=234531
* Implement xlocale APIs from Darwin, mainly for use by libc++. This adds aDavid Chisnall2011-11-201-1/+32
| | | | | | | | | | | | | | | load of _l suffixed versions of various standard library functions that use the global locale, making them take an explicit locale parameter. Also adds support for per-thread locales. This work was funded by the FreeBSD Foundation. Please test any code you have that uses the C standard locale functions! Reviewed by: das (gdtoa changes) Approved by: dim (mentor) Notes: svn path=/head/; revision=227753
* - Use an initializer macro to initialize fields in 'fake' FILE objects usedJohn Baldwin2010-03-111-4/+1
| | | | | | | | | | | | | | | by *sprintf(), etc. - Explicitly initialize _fl_mutex to PTHREAD_MUTEX_INITIALIZER for all FILE objects. This is currently a nop on FreeBSD, but is import for other platforms (or in the future) where PTHREAD_MUTEX_INITIALIZER is not simply zero. PR: threads/141198 Reported by: Jeremy Huddleston @ Apple MFC after: 2 weeks Notes: svn path=/head/; revision=205021
* Next stage of stdio cleanup: Retire __sFILEX and merge the fields back intoJohn Baldwin2008-04-171-3/+2
| | | | | | | | | | | | | | | | | | | | | | __sFILE. This was supposed to be done in 6.0. Some notes: - Where possible I restored the various lines to their pre-__sFILEX state. - Retire INITEXTRA() and just initialize the wchar bits (orientation and mbstate) explicitly instead. The various places that used INITEXTRA didn't need the locking fields or _up initialized. (Some places needed _up to exist and not be off the end of a NULL or garbage pointer, but they didn't require it to be initialized to a specific value.) - For now, stdio.h "knows" that pthread_t is a 'struct pthread *' to avoid namespace pollution of including all the pthread types in stdio.h. Once we remove all the inlines and make __sFILE private it can go back to using pthread_t, etc. - This does not remove any of the inlines currently and does not change any of the public ABI of 'FILE'. MFC after: 1 month Reviewed by: peter Notes: svn path=/head/; revision=178287
* Per Regents of the University of Calfornia letter, remove advertisingWarner Losh2007-01-091-4/+0
| | | | | | | | | clause. # If I've done so improperly on a file, please let me know. Notes: svn path=/head/; revision=165903
* Style: One space between "restrict" qualifier and "*".Tim J. Robbins2002-09-061-1/+1
| | | | Notes: svn path=/head/; revision=103012
* - Introduce the 'restrict' qualifier to function prototypes andRobert Drehmel2002-08-151-1/+1
| | | | | | | | definitions to comply with IEEE Std 1003.1-2001. - Update the manual pages. Notes: svn path=/head/; revision=101913
* Basic support for wide character I/O: getwc(), fgetwc(), getwchar(),Tim J. Robbins2002-08-131-0/+3
| | | | | | | putwc(), fputwc(), putwchar(), ungetwc(), fwide(). Notes: svn path=/head/; revision=101776
* Assume __STDC__, remove non-__STDC__ code.Alfred Perlstein2002-05-281-17/+0
| | | | | | | Submitted by: keramida Notes: svn path=/head/; revision=97407
* Fix the style of the SCM ID's.David E. O'Brien2002-03-221-4/+2
| | | | | | | I believe have made all of libc .c's as consistent as possible. Notes: svn path=/head/; revision=92986
* revert freeing of memory that gets allocated when str == NULLAssar Westerlund2001-06-181-2/+0
| | | | | | | | | (this will be fixed in a better way) PR: misc/26044 Notes: svn path=/head/; revision=78399
* free memory that gets allocated by vfprintf when str == NULLAssar Westerlund2001-06-161-0/+2
| | | | | | | | | PR: misc/26044 MFC after: 1 week Notes: svn path=/head/; revision=78325
* libc MT-safety, part 2.Daniel Eischen2001-02-111-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a lock to FILE. flockfile and friends are now implemented (for the most part) in libc. flockfile_debug is implemented in libc_r; I suppose it's about time to kill it but will do it in a future commit. Fix a potential deadlock in _fwalk in a threaded environment. A file flag (__SIGN) was added to stdio.h that, when set, tells _fwalk to ignore it in its walk. This seemed to be needed in refill.c because each file needs to be locked when flushing. Add a stub for pthread_self in libc. This is needed by flockfile which is allowed by POSIX to be recursive. Make fgetpos() error return value (-1) match man page. Remove recursive calls to locked functions (stdio); I think I've got them all, but I may have missed a couple. A few K&R -> ANSI conversions along with removal of a few instances of "register". $Id$ -> $FreeBSD$ in libc/stdio/rget.c Not objected to: -arch, a few months ago Notes: svn path=/head/; revision=72373
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50476
* 1. EOF was returned when the buffer size was larger than INT_MAX. ThisAndrey A. Chernov1998-01-011-5/+5
| | | | | | | | | | | | | case has very little to do with the output size being larger than INT_MAX. 2. The new #include of <limits.h> was disordered. 3. The new declaration of `on' was disordered (integer types go together). 4. Testing an unsigned value for > 0 was fishy. Submitted by: bde Notes: svn path=/head/; revision=32168
* Correct type of stored argument place (from previous fix)Andrey A. Chernov1997-12-241-2/+2
| | | | Notes: svn path=/head/; revision=31982
* Return back to BSD snprintf semantics which recent C9x standard adoptsAndrey A. Chernov1997-12-241-6/+9
| | | | | | | | | | | | | instead of Singe Unix, thanx Bruce for explaining, I am not realize standards war was there. But now, fix n == 0 case to not return error and fix check for too big n. Things left to do: check for overflow in arguments. Notes: svn path=/head/; revision=31980
* 1) Oops! Insert again if (n == 0) return 0.Andrey A. Chernov1997-12-241-5/+5
| | | | | | | | | | | | | | | | | | | | | | Final word is Bruce's quote: C9x specifies the BSD4.4-Lite behaviour: [#3] ... Thus, the null-terminated output has been completely written if and only if the returned value is less than n. It means that if we not have any null-terminated output as for n == 0 we can't return value less than n, so we forced to return value equal to n i.e. 0 The next good thing is glibc compatibility, of course. 2) Do check for too big n in machine-independent way. 3) Minor optimization assuming EOF is < 0 Notes: svn path=/head/; revision=31979
* Back out part related to "return 0 if n == 0" and return EOF as before.Andrey A. Chernov1997-12-241-3/+1
| | | | | | | | | | | | | | The main argument is that it is impossible to determine if %n evaluated or not when snprintf return 0, because it can happens for both n == 0 and n == 1. Although EOF here is good indication of the end of process, if n is decreased in the loop... Since it is already supposed in many places that EOF *is* negative, f.e. from Single Unix specs for snprintf "return ... a negative value if an output error was encountered" this not makes situation worse. Notes: svn path=/head/; revision=31969
* snprintf return value fixes to conform Single Unix specs:Andrey A. Chernov1997-12-241-3/+8
| | | | | | | | | | | | | | | | | | | | | | | 1) if buffer size is smaller than arguments size, return buffer size, not arguments size as before. 2) if buffer size is 0, return 0, not EOF as before. (now it is compatible with Linux and Apache implementations too). NOTE: Single Unix specs says: If the value of n {buffer size} is zero on a call to snprintf(), an unspecified value less than 1 is returned. It means we can't return EOF since EOF can take *any* value in general not especially < 1. Better variant will be return -1 (it is less then 1 and different with n == 1 case) but -1 value is already occuped by EOF in our implementation, so we can't distinguish true IO error in that case. So 0 here is only possible case still conforming to Single Unix specs. Notes: svn path=/head/; revision=31966
* Revert $FreeBSD$ to $Id$Peter Wemm1997-02-221-1/+1
| | | | Notes: svn path=/head/; revision=22993
* Make the long-awaited change from $Id$ to $FreeBSD$Jordan K. Hubbard1997-01-141-1/+1
| | | | | | | | | | | This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise. Notes: svn path=/head/; revision=21673
* Suggested by: Bruce Evans, Jeffrey Hsu, Gary PalmerJames Raynard1996-06-221-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | Added $Id$'s to files that were lacking them (gpalmer), made some cosmetic changes to conform to style guidelines (bde) and checked against NetBSD and Lite2 to remove unnecessary divergences (hsu, bde) One last code cleanup:- Removed spurious casts in fseek.c and stdio.c. Added missing function argument in fwalk.c. Added missing header include in flags.c and rget.c. Put in casts where int's were being passed as size_t's. Put in missing prototypes for static functions. Changed second args of __sflags() inflags.c and writehook() in vasprintf.c from char * to const char * to conform to prototypes. This directory now compiles with no warnings with -Wall under gcc-2.6.3 and with considerably less warnings than before with the ultra-pedantic script I used for testing. (Most of the remaining ones are due to const poisoning). Notes: svn path=/head/; revision=16586
* Reviewed by: julian and (hsu?)Julian Elischer1996-01-221-0/+3
| | | | | | | | | Submitted by: John Birrel(L?) changes for threadsafe operations Notes: svn path=/head/; revision=13545
* BSD 4.4 Lite Lib SourcesRodney W. Grimes1994-05-271-0/+76
Notes: svn path=/cvs2svn/branches/unlabeled-1.1.1/; revision=1573
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 01:14:10 +0000