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/*-------------------------------------------------------------------------*/
/**
@file strlib.c
@author N. Devillard
@date Jan 2001
@version $Revision: 1.9 $
@brief Various string handling routines to complement the C lib.
This modules adds a few complementary string routines usually missing
in the standard C library.
*/
/*--------------------------------------------------------------------------*/
/*
$Id: strlib.c,v 1.9 2006-09-27 11:04:11 ndevilla Exp $
$Author: ndevilla $
$Date: 2006-09-27 11:04:11 $
$Revision: 1.9 $
*/
/*---------------------------------------------------------------------------
Includes
---------------------------------------------------------------------------*/
#include <string.h>
#include <ctype.h>
#include "strlib.h"
/*---------------------------------------------------------------------------
Defines
---------------------------------------------------------------------------*/
#define ASCIILINESZ 1024
/*---------------------------------------------------------------------------
Function codes
---------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/**
@brief Convert a string to lowercase.
@param s String to convert.
@return ptr to statically allocated string.
This function returns a pointer to a statically allocated string
containing a lowercased version of the input string. Do not free
or modify the returned string! Since the returned string is statically
allocated, it will be modified at each function call (not re-entrant).
*/
/*--------------------------------------------------------------------------*/
char * strlwc(const char * s)
{
static char l[ASCIILINESZ+1];
int i ;
if (s==NULL) return NULL ;
memset(l, 0, ASCIILINESZ+1);
i=0 ;
while (s[i] && i<ASCIILINESZ) {
l[i] = (char)tolower((int)s[i]);
i++ ;
}
l[ASCIILINESZ]=(char)0;
return l ;
}
/*-------------------------------------------------------------------------*/
/**
@brief Convert a string to uppercase.
@param s String to convert.
@return ptr to statically allocated string.
This function returns a pointer to a statically allocated string
containing an uppercased version of the input string. Do not free
or modify the returned string! Since the returned string is statically
allocated, it will be modified at each function call (not re-entrant).
*/
/*--------------------------------------------------------------------------*/
char * strupc(char * s)
{
static char l[ASCIILINESZ+1];
int i ;
if (s==NULL) return NULL ;
memset(l, 0, ASCIILINESZ+1);
i=0 ;
while (s[i] && i<ASCIILINESZ) {
l[i] = (char)toupper((int)s[i]);
i++ ;
}
l[ASCIILINESZ]=(char)0;
return l ;
}
/*-------------------------------------------------------------------------*/
/**
@brief Skip blanks until the first non-blank character.
@param s String to parse.
@return Pointer to char inside given string.
This function returns a pointer to the first non-blank character in the
given string.
*/
/*--------------------------------------------------------------------------*/
char * strskp(char * s)
{
char * skip = s;
if (s==NULL) return NULL ;
while (isspace((int)*skip) && *skip) skip++;
return skip ;
}
/*-------------------------------------------------------------------------*/
/**
@brief Remove blanks at the end of a string.
@param s String to parse.
@return ptr to statically allocated string.
This function returns a pointer to a statically allocated string,
which is identical to the input string, except that all blank
characters at the end of the string have been removed.
Do not free or modify the returned string! Since the returned string
is statically allocated, it will be modified at each function call
(not re-entrant).
*/
/*--------------------------------------------------------------------------*/
char * strcrop(char * s)
{
static char l[ASCIILINESZ+1];
char * last ;
if (s==NULL) return NULL ;
memset(l, 0, ASCIILINESZ+1);
strcpy(l, s);
last = l + strlen(l);
while (last > l) {
if (!isspace((int)*(last-1)))
break ;
last -- ;
}
*last = (char)0;
return l ;
}
/*-------------------------------------------------------------------------*/
/**
@brief Remove blanks at the beginning and the end of a string.
@param s String to parse.
@return ptr to statically allocated string.
This function returns a pointer to a statically allocated string,
which is identical to the input string, except that all blank
characters at the end and the beg. of the string have been removed.
Do not free or modify the returned string! Since the returned string
is statically allocated, it will be modified at each function call
(not re-entrant).
*/
/*--------------------------------------------------------------------------*/
char * strstrip(char * s)
{
static char l[ASCIILINESZ+1];
char * last ;
if (s==NULL) return NULL ;
while (isspace((int)*s) && *s) s++;
memset(l, 0, ASCIILINESZ+1);
strcpy(l, s);
last = l + strlen(l);
while (last > l) {
if (!isspace((int)*(last-1)))
break ;
last -- ;
}
*last = (char)0;
return (char*)l ;
}
/* Test code */
#ifdef TEST
int main(int argc, char * argv[])
{
char * str ;
str = "\t\tI'm a lumberkack and I'm OK " ;
printf("lowercase: [%s]\n", strlwc(str));
printf("uppercase: [%s]\n", strupc(str));
printf("skipped : [%s]\n", strskp(str));
printf("cropped : [%s]\n", strcrop(str));
printf("stripped : [%s]\n", strstrip(str));
return 0 ;
}
#endif
/* vim: set ts=4 et sw=4 tw=75 */
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