Subversion Repositories wimsdev

/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis

 *

 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

        /* This special program selects words composed by

         * selected characters, each selected character being used

         * at most once in the word */

        /* Selected characters are entered by the env var 'oncechar'.

         * Words entered by stdin. Output to stdout. */

#include "../wims.h"

#define MAX_WORDLEN 1023

char wbuf[MAX_WORDLEN+1];

char selbuf[256];

int getword(void)

{

    int t,c;

    do c=getchar(); while(isspace(c));

    for(t=0; t<MAX_WORDLEN && isalnum(c); t++, c=getchar()) wbuf[t]=c;

    wbuf[t]=0; return c;    

}

void checkword(void)

{

    char sbuf[256];

    char *p, *pt;

    memmove(sbuf,selbuf,sizeof(sbuf));

    for(p=wbuf; *p; p++) {

        pt=strchr(sbuf,*p); if(pt==NULL) return;

        else *pt=' ';

    }

    printf("%s\n",wbuf);

}

int main(int argc, char *argv[])

{

    int c;

    char *p;

    p=getenv("oncechar"); if(p==NULL || *p==0) return 0;

    snprintf(selbuf,sizeof(selbuf),"%s",p);

    for(p=selbuf; *p; p++)

      if(isspace(*p) || strchr("^?*.${}[]()\\",*p)!=NULL) strcpy(p,p+1);

    do{

        c=getword(); checkword();

    }

    while(c!=EOF);

    return 0;

}