Originální popis anglicky:
strcoll - string comparison using collating information
Návod, kniha: POSIX Programmer's Manual
#include <string.h>
int strcoll(const char *
s1, const char
*s2 );
The
strcoll() function shall compare the string pointed to by
s1
to the string pointed to by
s2, both interpreted as appropriate to the
LC_COLLATE category of the current locale.
The
strcoll() function 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
strcoll(), then check
errno.
Upon successful completion,
strcoll() shall return an integer greater
than, equal to, or less than 0, according to whether the string pointed to by
s1 is greater than, equal to, or less than the string pointed to by
s2 when both are interpreted as appropriate to the current locale.
On error,
strcoll() may set
errno, but no return value
is reserved to indicate an error.
The
strcoll() function may fail if:
- EINVAL
- The s1 or s2 arguments contain characters
outside the domain of the collating sequence.
The following sections are informative.
The following example uses an application-defined function,
node_compare(), to compare two nodes based on an alphabetical ordering
of the
string field.
#include <string.h>
...
struct node { /* These are stored in the table. */
char *string;
int length;
};
...
int node_compare(const void *node1, const void *node2)
{
return strcoll(((const struct node *)node1)->string,
((const struct node *)node2)->string);
}
...
The
strxfrm() and
strcmp() functions should be used for sorting
large lists.
None.
None.
strcmp() ,
strxfrm() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<string.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. 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 Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
