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From: "raji at linux dot vnet.ibm.com" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug localedata/17596] New: mblen() does not return -1 for invalid input Date: Thu, 13 Nov 2014 09:49:00 -0000 [thread overview] Message-ID: <bug-17596-131@http.sourceware.org/bugzilla/> (raw) https://sourceware.org/bugzilla/show_bug.cgi?id=17596 Bug ID: 17596 Summary: mblen() does not return -1 for invalid input Product: glibc Version: 2.21 Status: NEW Severity: minor Priority: P2 Component: localedata Assignee: unassigned at sourceware dot org Reporter: raji at linux dot vnet.ibm.com CC: libc-locales at sourceware dot org The standard document for mblen() states: #include <stdlib.h> int mblen(const char *s, size_t n); The standard states: "If s is a null pointer, the mblen function returns a nonzero or zero value, if multibyte character encodings, respectively, do or do not have state-dependent encodings. If s is not a null pointer, the mblen function either returns 0 (if s points to the null character), or returns the number of bytes that are contained in the multibyte character (if the next n or fewer bytes form a valid multibyte character), or returns -1 (if they do not form a valid multibyte character). " The case n=0 is not explicitly mentioned in the standards document and is also not handled in the code(stdlib/mblen.c) When compiled on AIX (v6.1 and other releases) mblen() returns -1. $ cat mblen_t.c #include <stdio.h> #include <stdlib.h> #include <locale.h> main() { char sbcs_st[] = "12345"; if ( setlocale( LC_ALL, "" ) == NULL ) { printf( "setlocale() failed\n" ); } printf("RC is %d\n", mblen(sbcs_st, 0)); } $ gcc -o mblen_t mblen_t.c;./mblen_t RC is 0 https://sourceware.org/ml/libc-alpha/2014-11/msg00191.html -- You are receiving this mail because: You are on the CC list for the bug.
next reply other threads:[~2014-11-13 9:49 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-11-13 9:49 raji at linux dot vnet.ibm.com [this message] 2014-11-13 9:50 ` [Bug localedata/17596] " raji at linux dot vnet.ibm.com 2014-11-20 17:10 ` raji at linux dot vnet.ibm.com
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