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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. /* Versatile translation according to a dictionary */
  19.  
  20. /*************** Customization: change values hereafter ****************/
  21.  
  22. /* limit of dictionary entries */
  23. #define entrylim 32768
  24. /* limit of dictionary length */
  25. #define diclim 2*1024*1024
  26. /* limit of source length */
  27. #define sourcelim 16*1024*1024
  28.  
  29. /***************** Nothing should need change hereafter *****************/
  30. #include "../Lib/libwims.h"
  31. #include "suffix.h"
  32.  
  33. char *inpbuf, outbuf[2*(MAX_LINELEN+1)];
  34. char *dicbuf;
  35. struct entry {
  36.     unsigned char *original, *replace;
  37.     int olen,earlier;
  38. } entry[entrylim];
  39. int entrycount;
  40.  
  41. enum {
  42.     unk_delete, unk_leave, unk_replace
  43. };
  44.  
  45. int has_digits=0;
  46. int unknown_type=unk_delete;
  47. int nocase=0,leaveline=0,fromfile=0;
  48. char *unknown, unkbuf[1024];
  49.  
  50. /* Exit without translating anything */
  51. void escape(void)
  52. {
  53.     printf("%s",inpbuf); exit(0);
  54. }
  55.  
  56. /* strip trailing spaces; return string end. */
  57. char *strip_trailing_spaces2(char *p)
  58. {
  59.     char *pp;
  60.     if(*p==0) return p;
  61.     for(pp=p+strlen(p)-1; pp>=p && isspace(*pp); *(pp--)=0);
  62.     return pp;
  63. }
  64.  
  65. int compare(int i1, const char *s2)
  66. {
  67.     int k;
  68.     if(nocase) k=strncasecmp((char*)entry[i1].original,s2,entry[i1].olen);
  69.     else k=strncmp((char*)entry[i1].original,s2,entry[i1].olen);
  70.     if(k==0 && (isalnum(*(s2+entry[i1].olen)) || (*(s2+entry[i1].olen)&128)!=0)) return -1;
  71.     else return k;
  72. }
  73.  
  74. /* searches a list. Returns index if found, -1 if nomatch.
  75.  * Uses binary search, list must be sorted.
  76.  */
  77. int search_list2(struct entry *list, int items, size_t item_size, const char *str)
  78. {
  79.     int i1,i2,j,k,t,t1;
  80.     unsigned char c;
  81.  
  82.     if(items<=0) return -1;
  83.     j=0; c=str[0];
  84.     k=list[0].original[0]-c; if(k==0) k=compare(0,str);
  85.     if(k==0) goto more; if(k>0) return -1;
  86.     j=items-1; k=list[j].original[0]-c; if(k==0) k=compare(j,str);
  87.     if(k==0) return j;
  88.     if(k>0) for(i1=0,i2=j;i2>i1+1;) {
  89.       j=i1+(i2-i1)/2;
  90.       k=list[j].original[0]-c; if(k==0) k=compare(j,str);
  91.       if(k==0) goto more;
  92.       if(k>0) {i2=j; continue;}
  93.       if(k<0) {i1=j; continue;}
  94.     }
  95.     if(k>0) {j--;k=compare(j,str);}
  96.     more:
  97.     if((t=list[j].earlier)<0) {
  98.       if(k==0) return j; else return -1;
  99.     }
  100.     if(compare(t,str)!=0) return -1;
  101.     for(j=t1=t,k=0;j<items && list[j].earlier==t1 && (k=compare(j,str))<=0; j++) {
  102.       if(k==0) t=j;
  103.     }
  104.     return t;
  105. }
  106.  
  107. /* modify a string. Bufferlen must be at least MAX_LINELEN */
  108. void string_modify3(char *start, char *bad_beg, char *bad_end, char *good,...)
  109. {
  110.     char buf[MAX_LINELEN+1];
  111.     va_list vp;
  112.  
  113.     va_start(vp,good);
  114.     vsnprintf(buf,sizeof(buf),good,vp); va_end(vp);
  115.     if(strlen(start)-(bad_end-bad_beg)+strlen(buf)>=2*MAX_LINELEN)
  116.       return; /* this is an error situation. */
  117.     strcat(buf,bad_end);
  118.     ovlstrcpy(bad_beg,buf);
  119. }
  120.  
  121. /* change all spaces into ' ', and collapse multiple occurences */
  122. void singlespace2(char *p)
  123. {
  124.     char *pp, *p2;
  125.     for(pp=p;*pp;pp++) {
  126.       if(!isspace(*pp)) continue;
  127.       if(leaveline) {
  128.           if(*pp==13) ovlstrcpy(pp,pp+1);
  129.           if(*pp=='\n') {
  130.             pp++;
  131.             gopt: for(p2=pp; isspace(*p2) && *p2!='\n'; p2++);
  132.             if(p2>pp) ovlstrcpy(pp,p2); pp--;
  133.           }
  134.           else {
  135.             pp++; if(!isspace(*pp) || *pp=='\n') continue;
  136.             goto gopt;
  137.           }
  138.       }
  139.       else {
  140.           if(*pp!=' ') *pp=' ';
  141.           pp++; if(!isspace(*pp)) continue;
  142.           for(p2=pp;isspace(*p2);p2++);
  143.           ovlstrcpy(pp,p2); pp--;
  144.       }
  145.     }
  146. }
  147.  
  148. /* Prepare dictionary */
  149. void prepare_dic(void)
  150. {
  151.     int i,l;
  152.     FILE *dicf;
  153.     char *fname, *p1, *p2, *pp, buf[1024];
  154.     long int flen;
  155.     fname=getenv("w_dictionary");
  156.     if(fname==NULL || *fname==0 || *fname=='/' || strstr(fname,"..")) {
  157.       p1=getenv("w_module"); if(p1 && strncmp(p1,"classes/",strlen("classes/"))==0) {
  158.           p1=getenv("w_wims_class"); p2=getenv("w_wims_home");
  159.           if(p1 && p2) {
  160.             snprintf(buf,sizeof(buf),"%s/log/classes/%s/",p2,p1);
  161.             if(strncmp(fname,buf,strlen(buf))!=0) escape();
  162.           }
  163.           else escape();
  164.       }
  165.       else {
  166.           p1=getenv("untrust"); if(p1 && strstr(p1,"yes")) escape();
  167.       }
  168.     }
  169. /* replace escape() by return if there is some suffix dictionary, */
  170.  
  171.     dicf=fopen(fname,"r"); if(dicf==NULL) return;
  172.     fseek(dicf,0,SEEK_END);flen=ftell(dicf); fseek(dicf,0,SEEK_SET);
  173.     if(flen>diclim) escape();
  174.     dicbuf=xmalloc(flen+16);flen=fread(dicbuf,1,flen,dicf);
  175.     fclose(dicf);
  176.     if(flen>0 && flen<diclim) dicbuf[flen]=0;
  177.     else escape();
  178.     for(i=0,p1=dicbuf;p1!=NULL && *p1!=0 && i<entrylim;p1=p2) {
  179.       p2=strchr(p1+1,'\n'); if(p2>p1) *p2++=0;
  180.       pp=strchr(p1,':'); if(pp==NULL) continue;
  181.       *pp++=0;
  182.       strip_trailing_spaces2(p1); strip_trailing_spaces2(pp);
  183.       singlespace2(p1);
  184.       p1=find_word_start(p1); pp=find_word_start(pp);
  185.       if(*p1==0) continue;
  186.       if(has_digits==0) {
  187.           char *p;
  188.           for(p=p1;*p!=0 && p<pp && !isdigit(*p);p++);
  189.           if(isdigit(*p)) has_digits=1;
  190.       }
  191.       entry[i].original=(unsigned char*)p1;
  192.       entry[i].replace=(unsigned char*)pp;
  193.       entry[i].olen=l=strlen(p1); entry[i].earlier=-1;
  194.       if(i>0) {
  195.           int l1,l2;
  196.           l1=entry[i-1].earlier; if(l1>=0) l2=entry[l1].olen;
  197.           else {l2=entry[i-1].olen;l1=i-1;}
  198.           if(l>l2 && isspace(p1[l2])
  199.              && strncmp((char*)entry[l1].original,p1,l2)==0)
  200.             entry[i].earlier=entry[i-1].earlier=l1;
  201.       }
  202.       i++;
  203.     }
  204.     entrycount=i; if(entrycount<=0) escape();
  205. }
  206.  
  207. /* now make the translation. */
  208. void translate(void)
  209. {
  210.     char *p1, *p2, *pp;
  211.     int t;
  212.  
  213.     for(p1=find_word_start(outbuf);
  214.       p1!=NULL && p1-outbuf<MAX_LINELEN && *p1!=0;
  215.       p1=p2) {
  216.       p2=find_word_end(p1);
  217.       for(pp=p1;pp<p2 &&
  218.           ((!has_digits && isalpha(*pp)) ||
  219.            (has_digits && isalnum(*pp)) || (*pp&128)!=0 ||
  220.            strchr("_",*pp)!=NULL);pp++);
  221.       p2=find_word_start(p2);
  222.       if(pp==p1 ||
  223.          (has_digits==0 && isdigit(*pp)) ||
  224.          (*pp!=0 && !isspace(*pp) && strchr(",.?!/;",*pp)==NULL)) continue;
  225.       t=search_list2(entry,entrycount,sizeof(entry[0]),p1);
  226.       if(t<0) {
  227.           switch(unknown_type) {
  228.             case unk_leave: break;
  229.             case unk_delete: {
  230.                 ovlstrcpy(p1,find_word_start(pp)); p2=p1;
  231.                 break;
  232.             }
  233.             case unk_replace: {
  234.                 string_modify3(outbuf,p1,pp,unkbuf);
  235.                 p2=find_word_start(p1+strlen(unkbuf));
  236.             }
  237.           }
  238.           continue;
  239.       }
  240.       string_modify3(outbuf,p1,p1+strlen((char*)entry[t].original),
  241.                   (char*)entry[t].replace);
  242.       p2=find_word_start(p1+strlen((char*)entry[t].replace));
  243.     }
  244.     outbuf[MAX_LINELEN]=0; printf("%s",outbuf);
  245. }
  246.  
  247. void switches(void)
  248. {
  249.     char *sw;
  250.     unknown=getenv("w_translator_unknown");
  251.     if(unknown==NULL) unknown="";
  252.     snprintf(unkbuf,sizeof(unkbuf),"%s",find_word_start(unknown));
  253.     *find_word_end(unkbuf)=0;
  254.     if(strcasecmp(unkbuf,"leave")==0) unknown_type=unk_leave;
  255.     else if(unkbuf[0]!=0) unknown_type=unk_replace;
  256.     sw=getenv("w_translator_switch");
  257.     if(sw==NULL) return;
  258.     if(strstr(sw,"leaveline")) leaveline=1;
  259.     if(strstr(sw,"nocase")) nocase=1;
  260.     if(strstr(sw,"file")) fromfile=1;
  261. }
  262.  
  263. int main()
  264. {
  265.     char c, *p1, *p2, *s;
  266.     unsigned int l;
  267.  
  268.     switches();
  269.     if(!fromfile) {
  270.       s=getenv("wims_exec_parm");
  271.       if(s==NULL || *s==0) return 0; /* Nothing to translate */
  272.       l=strlen(s); if(l<=0 || l>sourcelim) return 0; /* too long */
  273.       inpbuf=xmalloc(l+16); memmove(inpbuf,s,l+1);
  274.     }
  275.     else {
  276.       FILE *f;
  277.       s=getenv("translator_input"); if(s==NULL || *s==0) return 0;
  278.       f=fopen(s,"r"); if(f==NULL) return 0; /* no file */
  279.       fseek(f,0,SEEK_END); l=ftell(f); fseek(f,0,SEEK_SET);
  280.       if(l<=0 || l>sourcelim) return 0; /* too long */
  281.       inpbuf=xmalloc(l+16); (void)fread(inpbuf,1,l,f); fclose(f); inpbuf[l]=0;
  282.     }
  283.     p1=inpbuf; prepare_dic();
  284.     if(leaveline) c='\n'; else c=' ';
  285.     do {
  286.       l=strlen(p1);
  287.       if(l>MAX_LINELEN-1024) l=MAX_LINELEN-1024; p2=p1+l;
  288.       if(*p2) {
  289.           while(p2>p1 && *p2!=c) p2--;
  290.       }
  291.       if(p2<=p1) return 0;
  292.       memmove(outbuf,p1,p2-p1); outbuf[p2-p1]=0;
  293.       singlespace2(outbuf);
  294.       s=getenv("w_suffix_dictionary");
  295.       if(s!=NULL && *s!=0) suffix(outbuf,s);
  296.       translate();
  297.       if(*p2==c) {printf("%c",c); p1=++p2;}
  298.     }
  299.     while(*p2);
  300.     return 0;
  301. }
  302.