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  1. /*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
  2.  *
  3.  *  This program is free software; you can redistribute it and/or modify
  4.  *  it under the terms of the GNU General Public License as published by
  5.  *  the Free Software Foundation; either version 2 of the License, or
  6.  *  (at your option) any later version.
  7.  *
  8.  *  This program is distributed in the hope that it will be useful,
  9.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11.  *  GNU General Public License for more details.
  12.  *
  13.  *  You should have received a copy of the GNU General Public License
  14.  *  along with this program; if not, write to the Free Software
  15.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16.  */
  17.  
  18. /* This special program selects words composed by
  19.  * selected characters, each selected character being used
  20.  * at most once in the word
  21.  */
  22.  
  23. /* Selected characters are entered by the env var 'oncechar'.
  24.  * Words entered by stdin. Output to stdout.
  25.  */
  26.  
  27. #include "../Lib/libwims.h"
  28.  
  29. #define MAX_WORDLEN 1023
  30. char wbuf[MAX_WORDLEN+1];
  31. char selbuf[256];
  32.  
  33. int getword(void)
  34. {
  35.   int t,c;
  36.  
  37.   do c=getchar(); while(isspace(c));
  38.   for(t=0; t<MAX_WORDLEN && isalnum(c); t++, c=getchar()) wbuf[t]=c;
  39.   wbuf[t]=0; return c;
  40. }
  41.  
  42. void checkword(void)
  43. {
  44.   char sbuf[256];
  45.   char *p, *pt;
  46.   memmove(sbuf,selbuf,sizeof(sbuf));
  47.   for(p=wbuf; *p; p++) {
  48.     pt=strchr(sbuf,*p); if(pt==NULL) return;
  49.     else *pt=' ';
  50.   }
  51.   printf("%s\n",wbuf);
  52. }
  53.  
  54. int main(int argc, char *argv[])
  55. {
  56.   int c;
  57.   char *p;
  58.  
  59.   p=getenv("oncechar"); if(p==NULL || *p==0) return 0;
  60.   snprintf(selbuf,sizeof(selbuf),"%s",p);
  61.   for(p=selbuf; *p; p++)
  62.     if(isspace(*p) || strchr("^?*.${}[]()\\",*p)!=NULL) ovlstrcpy(p,p+1);
  63.   do{
  64.     c=getword(); checkword();
  65.   }
  66.   while(c!=EOF);
  67.   return 0;
  68. }
  69.  
  70.