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/** \file stringutils.c
* Some assorted string handling functions
*/
/* XTrackCAD - Model Railroad CAD
* Copyright (C) 2019 Martin Fischer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "shortentext.h"
#define WHITESPACES "\n\r\t "
#define ELLIPSIZE "..."
/**
* Replace all whitespace characters with blanks. Successive occurences are reduced to a single blank.
*
* \param source IN string to convert
* \param dest IN buffer for converted string, minimum size is the size of the source string
*/
void
RemoveFormatChars( char *source, char *dest )
{
int lastChar = '\0';
while (*source) {
if (strchr(WHITESPACES, *source)) {
if (lastChar != ' ') {
*dest++ = ' ';
lastChar = ' ';
}
} else {
lastChar = *source;
*dest++ = lastChar;
}
source++;
}
if (lastChar != ' ') {
*dest = '\0';
} else {
*(dest - 1) = '\0';
}
}
void
EllipsizeString(char *source, char *dest, size_t length)
{
size_t position;
char *resultString = (dest ? dest: source);
// trivial case: nothing to do if source is shorter and no inplace
if( strlen(source) <= length )
{
if( dest )
strcpy(dest, source);
return;
}
strncpy(resultString, source, length);
resultString[ length ] = '\0';
position = length - 1;
while (position) {
if (resultString[position] == ' ' && position <= (length - sizeof(ELLIPSIZE))) {
strcpy(resultString + position, ELLIPSIZE);
break;
} else {
position--;
}
}
// no blank in string, replace the last n chars
if (!position) {
strcpy(resultString + (strlen(resultString) - sizeof(ELLIPSIZE) + 1), ELLIPSIZE);
}
return;
}
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