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/*!
\file lib/db/dbmi_base/case.c
\brief DBMI Library (base) - case string conversion
(C) 1999-2009, 2011 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Joel Jones (CERL/UIUC), Radim Blazek
\author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
*/
#include <grass/dbmi.h>
/*!
\brief Convert character to lowercase
\param s character to be modified
*/
void db_char_to_lowercase(char *s)
{
if (*s >= 'A' && *s <= 'Z')
*s -= 'A' - 'a';
}
/*!
\brief Convert character to uppercase
\param s character to be modified
*/
void db_char_to_uppercase(char *s)
{
if (*s >= 'a' && *s <= 'z')
*s += 'A' - 'a';
}
/*!
\brief Convert string to lowercase
\param s string buffer to be modified
*/
void db_Cstring_to_lowercase(char *s)
{
while (*s)
db_char_to_lowercase(s++);
}
/*!
\brief Convert string to lowercase
\param s string buffer to be modified
*/
void db_Cstring_to_uppercase(char *s)
{
while (*s)
db_char_to_uppercase(s++);
}
/*!
\brief Compare strings case-insensitive
\param a,b string buffers to be compared
\return 0 strings equal
\return 1 otherwise
*/
int db_nocase_compare(const char *a, const char *b)
{
char s, t;
while (*a && *b) {
s = *a++;
t = *b++;
db_char_to_uppercase(&s);
db_char_to_uppercase(&t);
if (s != t)
return 0;
}
return (*a == 0 && *b == 0);
}
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