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/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 */
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        /* This special program selects words composed by
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         * selected characters, each selected character being used
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         * at most once in the word */
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        /* Selected characters are entered by the env var 'oncechar'.
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         * Words entered by stdin. Output to stdout. */
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#include "../wims.h"
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#include "../Lib/basicstr.c"
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#define MAX_WORDLEN 1023
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char wbuf[MAX_WORDLEN+1];
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char selbuf[256];
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int getword(void)
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{
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    int t,c;
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    do c=getchar(); while(isspace(c));
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    for(t=0; t<MAX_WORDLEN && isalnum(c); t++, c=getchar()) wbuf[t]=c;
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    wbuf[t]=0; return c;    
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}
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void checkword(void)
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{
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    char sbuf[256];
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    char *p, *pt;
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    memmove(sbuf,selbuf,sizeof(sbuf));
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    for(p=wbuf; *p; p++) {
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        pt=strchr(sbuf,*p); if(pt==NULL) return;
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        else *pt=' ';
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    }
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    printf("%s\n",wbuf);
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}
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int main(int argc, char *argv[])
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{
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    int c;
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    char *p;
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    p=getenv("oncechar"); if(p==NULL || *p==0) return 0;
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    snprintf(selbuf,sizeof(selbuf),"%s",p);
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    for(p=selbuf; *p; p++)
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      if(isspace(*p) || strchr("^?*.${}[]()\\",*p)!=NULL) ovlstrcpy(p,p+1);
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    do{
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        c=getword(); checkword();
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    }
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    while(c!=EOF);
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    return 0;
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}
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