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/* $Id: ncbi_ansi_ext.c,v 6.19 2006/03/07 18:15:14 lavr Exp $
* ===========================================================================
*
* PUBLIC DOMAIN NOTICE
* National Center for Biotechnology Information
*
* This software/database is a "United States Government Work" under the
* terms of the United States Copyright Act. It was written as part of
* the author's official duties as a United States Government employee and
* thus cannot be copyrighted. This software/database is freely available
* to the public for use. The National Library of Medicine and the U.S.
* Government have not placed any restriction on its use or reproduction.
*
* Although all reasonable efforts have been taken to ensure the accuracy
* and reliability of the software and data, the NLM and the U.S.
* Government do not and cannot warrant the performance or results that
* may be obtained by using this software or data. The NLM and the U.S.
* Government disclaim all warranties, express or implied, including
* warranties of performance, merchantability or fitness for any particular
* purpose.
*
* Please cite the author in any work or product based on this material.
*
* ===========================================================================
*
* Author: Anton Lavrentiev
*
* File Description:
* Non-ANSI, yet widely used functions
*
*/
#include "ncbi_ansi_ext.h"
#include <ctype.h>
#include <stdlib.h>
#ifndef HAVE_STRDUP
extern char* strdup(const char* str)
{
size_t size = strlen(str) + 1;
char* res = (char*) malloc(size);
if (res)
memcpy(res, str, size);
return res;
}
#endif /*HAVE_STRDUP*/
#ifndef HAVE_STRNDUP
extern char* strndup(const char* str, size_t n)
{
const char* end = n ? memchr(str, '\0', n) : 0;
size_t size = end ? (size_t)(end - str) : n;
char* res = (char*) malloc(size + 1);
if (res) {
memcpy(res, str, size);
res[size] = '\0';
}
return res;
}
#endif /*HAVE_STRNDUP*/
#ifndef HAVE_STRCASECMP
/* We assume that we're using ASCII-based charsets */
extern int strcasecmp(const char* s1, const char* s2)
{
const unsigned char* p1 = (const unsigned char*) s1;
const unsigned char* p2 = (const unsigned char*) s2;
unsigned char c1, c2;
if (p1 == p2)
return 0;
do {
c1 = *p1++;
c2 = *p2++;
c1 = c1 >= 'A' && c1 <= 'Z' ? c1 + ('a' - 'A') : tolower(c1);
c2 = c2 >= 'A' && c2 <= 'Z' ? c2 + ('a' - 'A') : tolower(c2);
} while (c1 && c1 == c2);
return c1 - c2;
}
extern int strncasecmp(const char* s1, const char* s2, size_t n)
{
const unsigned char* p1 = (const unsigned char*) s1;
const unsigned char* p2 = (const unsigned char*) s2;
unsigned char c1, c2;
if (p1 == p2 || n == 0)
return 0;
do {
c1 = *p1++;
c2 = *p2++;
c1 = c1 >= 'A' && c1 <= 'Z' ? c1 + ('a' - 'A') : tolower(c1);
c2 = c2 >= 'A' && c2 <= 'Z' ? c2 + ('a' - 'A') : tolower(c2);
} while (--n > 0 && c1 && c1 == c2);
return c1 - c2;
}
#endif /*HAVE_STRCASECMP*/
extern char* strupr(char* s)
{
unsigned char* t = (unsigned char*) s;
while ( *t ) {
*t = toupper(*t);
t++;
}
return s;
}
extern char* strlwr(char* s)
{
unsigned char* t = (unsigned char*) s;
while ( *t ) {
*t = tolower(*t);
t++;
}
return s;
}
extern char* strncpy0(char* s1, const char* s2, size_t n)
{
*s1 = '\0';
return strncat(s1, s2, n);
}
/*
* --------------------------------------------------------------------------
* $Log: ncbi_ansi_ext.c,v $
* Revision 6.19 2006/03/07 18:15:14 lavr
* Optimize strndup()
*
* Revision 6.18 2006/03/07 17:54:44 ivanov
* Fixed compilation error in strndup
*
* Revision 6.17 2006/03/07 17:18:51 lavr
* +strndup
*
* Revision 6.16 2004/10/08 16:16:24 ivanov
* Removed extra ")"
*
* Revision 6.15 2004/10/08 15:45:19 lavr
* Make lower-case comparisons in no-case functions
*
* Revision 6.14 2002/10/29 22:18:29 lavr
* Comply with man strdup(2) in the implementation of strdup() here
*
* Revision 6.13 2002/10/28 18:55:26 lavr
* Fix change log to remove duplicate log entry for R6.12
*
* Revision 6.12 2002/10/28 18:52:07 lavr
* Conditionalize definitions of strdup() and str[n]casecmp()
*
* Revision 6.11 2002/10/28 15:41:56 lavr
* Use "ncbi_ansi_ext.h" privately
*
* Revision 6.10 2002/09/24 15:05:45 lavr
* Log moved to end
*
* Revision 6.9 2002/03/19 22:12:28 lavr
* strcasecmp and strncasecmp are optimized (for ASCII range)
*
* Revision 6.8 2001/12/04 15:57:22 lavr
* Tiny style adjustement
*
* Revision 6.7 2000/12/28 21:27:52 lavr
* ANSI C++ compliant use of malloc (explicit casting of result)
*
* Revision 6.6 2000/11/07 21:45:16 lavr
* Removed isupper/islower checking in strlwr/strupr
*
* Revision 6.5 2000/11/07 21:19:38 vakatov
* Compilation warning fixed; plus, some code beautification...
*
* Revision 6.4 2000/10/18 21:15:53 lavr
* strupr and strlwr added
*
* Revision 6.3 2000/10/06 16:40:23 lavr
* <string.h> included now in <connect/ncbi_ansi_ext.h>
* conditional preprocessor statements removed
*
* Revision 6.2 2000/05/17 16:11:02 lavr
* Reorganized for use of HAVE_* defines
*
* Revision 6.1 2000/05/15 19:03:41 lavr
* Initial revision
*
* ==========================================================================
*/
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