Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #365
Difficulty: Medium
The original code for vi was written by Bill Joy in 1976.
True or False?
Linux & Unix Commands - Search Man Pages

strxfrm(3c) [opensolaris man page]

strxfrm(3C)						   Standard C Library Functions 					       strxfrm(3C)

NAME
strxfrm - string transformation SYNOPSIS
#include <string.h> size_t strxfrm(char *restrict s1, const char *restrict s2, size_t n); DESCRIPTION
The strxfrm() function transforms the string pointed to by s2 and places the resulting string into the array pointed to by s1. The trans- formation is such that if strcmp(3C) is applied to two transformed strings, it returns a value greater than, equal to or less than 0, cor- responding to the result of strcoll(3C) applied to the same two original strings. No more than n bytes are placed into the resulting array pointed to by s1, including the terminating null byte. If n is 0, s1 is permitted to be a null pointer. If copying takes place between objects that overlap, the behavior is undefined. The strxfrm() function does not change the setting of errno if successful. Since no return value is reserved to indicate an error, an application wishing to check for error situations should set errno to 0, then call strxfrm(), then check errno. RETURN VALUES
Upon successful completion, strxfrm() returns the length of the transformed string (not including the terminating null byte). If the value returned is n or more, the contents of the array pointed to by s1 are indeterminate. On error, strxfrm() may set errno but no return value is reserved to indicate the error. USAGE
The transformation function is such that two transformed strings can be ordered by strcmp(3C) as appropriate to collating sequence informa- tion in the program's locale (category LC_COLLATE). The fact that when n is 0, s1 is permitted to be a null pointer, is useful to determine the size of the s1 array prior to making the trans- formation. EXAMPLES
Example 1 A sample of using the strxfm() function. The value of the following expression is the size of the array needed to hold the transformation of the string pointed to by s. 1 + strxfrm(NULL, s, 0); FILES
/usr/lib/locale/locale/locale.so.* LC_COLLATE database for locale ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+ The strxfrm() function can be used safely in a multithreaded application, as long as setlocale(3C) is not being called to change the locale. SEE ALSO
localedef(1), setlocale(3C), strcmp(3C), strcoll(3C), wscoll(3C), attributes(5), environ(5), standards(5) SunOS 5.11 10 Dec 2003 strxfrm(3C)

Check Out this Related Man Page

STRXFRM(3P)						     POSIX Programmer's Manual						       STRXFRM(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
strxfrm, strxfrm_l -- string transformation SYNOPSIS
#include <string.h> size_t strxfrm(char *restrict s1, const char *restrict s2, size_t n); size_t strxfrm_l(char *restrict s1, const char *restrict s2, size_t n, locale_t locale); DESCRIPTION
For strxfrm(): The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard. The strxfrm() and strxfrm_l() functions shall transform the string pointed to by s2 and place the resulting string into the array pointed to by s1. The transformation is such that if strcmp() is applied to two transformed strings, it shall return a value greater than, equal to, or less than 0, corresponding to the result of strcoll() or strcoll_l(), respectively, applied to the same two original strings with the same locale. No more than n bytes are placed into the resulting array pointed to by s1, including the terminating NUL character. If n is 0, s1 is permitted to be a null pointer. If copying takes place between objects that overlap, the behavior is undefined. The strxfrm() and strxfrm_l() functions shall not change the setting of errno if successful. Since no return value is reserved to indicate an error, an application wishing to check for error situations should set errno to 0, then call strxfrm() or strxfrm_l(), then check errno. The behavior is undefined if the locale argument to strxfrm_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. RETURN VALUE
Upon successful completion, strxfrm() and strxfrm_l() shall return the length of the transformed string (not including the terminating NUL character). If the value returned is n or more, the contents of the array pointed to by s1 are unspecified. On error, strxfrm() and strxfrm_l() may set errno but no return value is reserved to indicate an error. ERRORS
These functions may fail if: EINVAL The string pointed to by the s2 argument contains characters outside the domain of the collating sequence. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
The transformation function is such that two transformed strings can be ordered by strcmp() as appropriate to collating sequence informa- tion in the current locale (category LC_COLLATE). The fact that when n is 0 s1 is permitted to be a null pointer is useful to determine the size of the s1 array prior to making the trans- formation. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
strcmp(), strcoll() The Base Definitions volume of POSIX.1-2008, <string.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . IEEE
/The Open Group 2013 STRXFRM(3P)

Featured Tech Videos