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| Rev | Author | Line No. | Line |
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| 10 | reyssat | 1 | /* Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis |
| 2 | * |
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| 3 | * This program is free software; you can redistribute it and/or modify |
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| 4 | * it under the terms of the GNU General Public License as published by |
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| 5 | * the Free Software Foundation; either version 2 of the License, or |
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| 6 | * (at your option) any later version. |
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| 7 | * |
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| 8 | * This program is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * GNU General Public License for more details. |
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| 12 | * |
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| 13 | * You should have received a copy of the GNU General Public License |
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| 14 | * along with this program; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 16 | */ |
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| 17 | |||
| 7676 | bpr | 18 | /* Check type of a file */ |
| 10 | reyssat | 19 | |
| 20 | /*************** Customization: change values hereafter ****************/ |
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| 21 | |||
| 7676 | bpr | 22 | /* limit of data buffers */ |
| 10 | reyssat | 23 | #define buflim 1024*1024*16 |
| 24 | |||
| 25 | /***************** Nothing should need change hereafter *****************/ |
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| 8185 | bpr | 26 | |
| 8094 | bpr | 27 | #include "../Lib/libwims.h" |
| 10 | reyssat | 28 | |
| 8185 | bpr | 29 | #define hmsame "\\CC\\Delta\\Gamma\\Lambda\\NN\\Omega\\Phi\\Pi\\Psi\\QQ\\RR\\Sigma\\Xi\\ZZ\\alpha\\beta\\cap\\chi\\cup\\delta\\div\\eta\\exists\\forall\\gamma\\in\\infty\\iota\\kappa\\lambda\\mu\\nabla\\nu\\omega\\pi\\pm\\psi\\rho\\sigma\\subset\\subseteq\\tau\\theta\\times\\varepsilon\\varphi\\xi\\zeta\\" |
| 30 | |||
| 10 | reyssat | 31 | char fn1[1024]="", fn2[1024]=""; |
| 32 | char mathbuf[MAX_LINELEN+1]; |
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| 33 | char *filebuf; |
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| 34 | int filelen=0; |
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| 35 | int latex2html=0; |
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| 36 | FILE *outf; |
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| 37 | |||
| 38 | struct { |
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| 39 | char *name, *trans; |
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| 40 | } backtrans[]={ |
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| 7676 | bpr | 41 | {"\\ge\\", " >= "}, |
| 42 | {"\\geq\\", " >= "}, |
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| 43 | {"\\le\\", " <= "}, |
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| 44 | {"\\leq\\", " <= "}, |
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| 45 | {"\\to\\", " -> "}, |
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| 46 | {"\\rightarrow\\", " -> "}, |
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| 10 | reyssat | 47 | {"\\longrightarrow\\", " --> "}, |
| 7676 | bpr | 48 | {"\\Rightarrow\\", " => "}, |
| 10 | reyssat | 49 | {"\\Longrightarrow\\", " ==> "}, |
| 50 | {"\\Leftrightarrow\\", " <=> "}, |
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| 51 | {"\\Longleftrightarrow\\", " <==> "}, |
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| 52 | {"\\Longleftarrow\\", " <== "}, |
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| 53 | }; |
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| 54 | |||
| 55 | #define backtransno (sizeof(backtrans)/sizeof(backtrans[0])) |
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| 56 | |||
| 57 | char *find_tag_end(char *p) |
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| 58 | { |
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| 59 | char *pp, *old; |
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| 60 | pp=p; if(*pp=='<') pp++; |
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| 61 | for(; *pp && *pp!='>'; pp++) { |
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| 7676 | bpr | 62 | if(*pp=='"') { |
| 63 | pp=strchr(pp+1,'"'); |
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| 64 | if(pp==NULL) {pp=p+strlen(p); break;} else continue; |
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| 65 | } |
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| 10 | reyssat | 66 | } |
| 7676 | bpr | 67 | /* this is probably an syntax error of the page */ |
| 10 | reyssat | 68 | if(*pp==0 && pp>p+2048) { |
| 7676 | bpr | 69 | old=p; if(*old=='<') old++; |
| 70 | pp=strchr(old,'>'); |
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| 71 | if(pp==NULL) pp=strchr(old,'<'); |
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| 72 | if(pp==NULL) pp=find_word_end(find_word_start(old)); |
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| 10 | reyssat | 73 | } |
| 74 | if(*pp=='>') pp++; return pp; |
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| 75 | } |
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| 76 | |||
| 77 | char *find_tag(char *p, char *tag) |
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| 78 | { |
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| 79 | char *pp; |
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| 80 | int len; |
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| 81 | len=strlen(tag); |
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| 82 | for(pp=strchr(p,'<'); pp!=NULL && *pp; pp=strchr(pp+1,'<')) { |
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| 7676 | bpr | 83 | if(strncasecmp(pp+1,tag,len)==0 && !isalnum(*(pp+1+len))) return pp; |
| 10 | reyssat | 84 | } |
| 85 | return p+strlen(p); |
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| 86 | } |
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| 87 | |||
| 8100 | bpr | 88 | /* modify a string. Bufferlen must be at least MAX_LINELEN */ |
| 89 | void string_modify3(char *start, char *bad_beg, char *bad_end, char *good,...) |
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| 10 | reyssat | 90 | { |
| 91 | char buf[MAX_LINELEN+1]; |
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| 92 | va_list vp; |
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| 7676 | bpr | 93 | |
| 10 | reyssat | 94 | va_start(vp,good); |
| 95 | vsnprintf(buf,sizeof(buf),good,vp); va_end(vp); |
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| 96 | if(strlen(start)-(bad_end-bad_beg)+strlen(buf)>=MAX_LINELEN) { |
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| 7676 | bpr | 97 | return; |
| 10 | reyssat | 98 | } |
| 99 | strcat(buf,bad_end); |
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| 3718 | reyssat | 100 | ovlstrcpy(bad_beg,buf); |
| 10 | reyssat | 101 | } |
| 102 | |||
| 103 | void cutamp(char *p) |
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| 104 | { |
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| 105 | char *pp; |
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| 106 | for(pp=strchr(p,'&'); pp; pp=strchr(pp+1,'&')) { |
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| 7676 | bpr | 107 | if(strncmp(pp,"&",5)==0) { |
| 108 | ovlstrcpy(pp+1,pp+5); continue; |
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| 109 | } |
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| 110 | if(strncmp(pp,"<",4)==0) { |
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| 111 | *pp='<'; ovlstrcpy(pp+1,pp+4); continue; |
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| 112 | } |
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| 113 | if(strncmp(pp,">",4)==0) { |
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| 114 | *pp='>'; ovlstrcpy(pp+1,pp+4); continue; |
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| 115 | } |
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| 116 | |||
| 10 | reyssat | 117 | } |
| 118 | } |
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| 119 | |||
| 7676 | bpr | 120 | /* get the file */ |
| 10 | reyssat | 121 | void prepare_file(void) |
| 122 | { |
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| 123 | FILE *f; |
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| 124 | long int flen; |
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| 125 | |||
| 126 | filelen=0; |
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| 127 | f=fopen(fn1,"r"); if(f==NULL) return; |
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| 128 | fseek(f,0,SEEK_END);flen=ftell(f); fseek(f,0,SEEK_SET); |
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| 129 | if(flen>buflim) return; |
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| 130 | filebuf=xmalloc(2*flen+1024);flen=fread(filebuf,1,flen,f); |
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| 131 | fclose(f); |
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| 132 | if(flen<0 || flen>=buflim) flen=0; filebuf[flen]=0; |
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| 133 | filelen=flen; |
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| 134 | outf=fopen(fn2,"w"); if(outf==NULL) return; |
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| 135 | } |
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| 136 | |||
| 137 | void getmath(char *p) |
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| 138 | { |
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| 139 | char *pt, *pv; |
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| 140 | char *p1, *p2, buf[256]; |
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| 141 | |||
| 142 | mathbuf[0]=0; |
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| 143 | pt=find_word_start(p); |
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| 144 | if(strncmp(pt,"\\begin{displaymath}", |
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| 7676 | bpr | 145 | strlen("\\begin{displaymath}"))==0) { |
| 146 | pt=strchr(pt,'}')+1; |
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| 147 | pv=strstr(pt,"\\end{displaymath}"); |
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| 148 | if(pv==NULL) return; |
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| 149 | goto insmath; |
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| 10 | reyssat | 150 | } |
| 151 | if(*pt=='%') pt=strchr(pt,'$'); if(pt==NULL) return; |
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| 152 | if(*pt!='$') return; do pt++; while(*pt=='$'); |
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| 153 | pv=strchr(pt,'$'); if(pv==NULL) return; |
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| 154 | insmath: if(pv-pt>=MAX_LINELEN-256) return; |
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| 155 | memmove(mathbuf,pt,pv-pt); mathbuf[pv-pt]=0; |
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| 156 | if(strstr(mathbuf,"...\n...")!=NULL) { |
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| 7676 | bpr | 157 | ovlstrcpy(mathbuf,"......"); return; |
| 10 | reyssat | 158 | } |
| 159 | cutamp(mathbuf); latex2html=1; |
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| 160 | for(p1=strstr(mathbuf,"\\mathbb");p1;p1=strstr(p1+1,"\\mathbb")) { |
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| 7676 | bpr | 161 | char c,*d; |
| 162 | p2=find_word_start(p1+strlen("\\mathbb")); c=0; |
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| 163 | if(strchr("NZQRC",*p2)!=NULL) c=*p2; |
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| 164 | else if(*p2=='{' && *(p2+2)=='}' && strchr("NZQRC",*(p2+1))!=NULL) { |
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| 165 | c=*(p2+1); p2+=2; |
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| 166 | } |
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| 167 | if(c) { |
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| 168 | p2=find_word_start(++p2); |
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| 169 | if(isalnum(*p2)) d=" "; else d=""; |
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| 170 | string_modify(mathbuf,p1,p2,"\\%c%c%s",c,c,d); |
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| 171 | } |
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| 10 | reyssat | 172 | } |
| 173 | for(p1=strstr(mathbuf,"{\\"); p1; p1=strstr(p1+1,"{\\")) { |
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| 7676 | bpr | 174 | if(p1>mathbuf && isalpha(*(p1-1))) continue; |
| 175 | for(p2=p1+2; p2<p1+24 && isalpha(*p2); p2++); |
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| 176 | if(*p2!='}' || isalnum(*(p2+1))) continue; |
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| 177 | memmove(buf,p1+1,p2-p1-1); buf[p2-p1-1]='\\'; buf[p2-p1]=0; |
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| 178 | if(strstr(hmsame,buf)==NULL) continue; |
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| 179 | ovlstrcpy(p2,p2+1); ovlstrcpy(p1,p1+1); |
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| 10 | reyssat | 180 | } |
| 181 | if(strstr(mathbuf,"\\begin{")!=NULL) return; |
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| 182 | for(p1=strchr(mathbuf,'{'); p1; p1=strchr(p1+1,'{')) { |
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| 7676 | bpr | 183 | if((p1>mathbuf && isalpha(*(p1-1))) || |
| 184 | !isalnum(*(p1+1)) || *(p1+2)!='}') continue; |
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| 185 | *p1=*(p1+1); ovlstrcpy(p1+1,p1+3); |
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| 10 | reyssat | 186 | } |
| 187 | if(strchr(mathbuf,'[')!=NULL) { |
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| 188 | char mbuf[MAX_LINELEN+1]; |
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| 7676 | bpr | 189 | snprintf(mbuf,sizeof(mbuf),"{%s}",mathbuf); |
| 190 | ovlstrcpy(mathbuf,mbuf); |
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| 10 | reyssat | 191 | } |
| 7676 | bpr | 192 | /* try to simplify */ |
| 10 | reyssat | 193 | if(strchr(mathbuf,'{')==NULL && strchr(mathbuf,'\\')!=NULL) { |
| 7676 | bpr | 194 | int i, tt; |
| 195 | tt=0; |
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| 196 | for(p1=strchr(mathbuf,'\\'); p1; p1=strchr(p1+1,'\\')) { |
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| 197 | for(p2=p1+1;isalpha(*p2);p2++); |
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| 198 | if(p2==p1+1 || p2>p1+24) {tt=1; break;} |
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| 199 | memmove(buf,p1,p2-p1);buf[p2-p1]='\\';buf[p2-p1+1]=0; |
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| 200 | for(i=0;i<backtransno && strcmp(buf,backtrans[i].name)!=0;i++); |
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| 201 | if(i>=backtransno && strstr(hmsame,buf)==NULL) { |
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| 202 | tt=1; break; |
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| 203 | } |
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| 204 | } |
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| 205 | if(tt==0) { |
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| 206 | for(p1=strchr(mathbuf,'\\'); p1; p1=strchr(p1+1,'\\')) { |
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| 207 | for(p2=p1+1;isalpha(*p2);p2++); |
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| 208 | if(p2==p1+1 || p2>p1+24) break; |
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| 209 | memmove(buf,p1,p2-p1);buf[p2-p1]='\\';buf[p2-p1+1]=0; |
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| 210 | for(i=0;i<backtransno && strcmp(buf,backtrans[i].name)!=0;i++); |
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| 211 | if(i<backtransno) |
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| 212 | string_modify(buf,p1,p2,backtrans[i].trans); |
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| 213 | else *p1=' '; |
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| 214 | } |
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| 215 | } |
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| 10 | reyssat | 216 | } |
| 217 | } |
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| 218 | |||
| 219 | void output(void) |
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| 220 | { |
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| 221 | char *p, *pp, *p2, *pt; |
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| 222 | char buf[MAX_LINELEN+1]; |
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| 223 | p=filebuf; |
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| 224 | restart: |
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| 225 | pp=find_tag(p,"body"); if(*pp!=0) { |
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| 7676 | bpr | 226 | p=find_tag_end(pp); goto restart; |
| 10 | reyssat | 227 | } |
| 228 | pp=find_tag(p,"html"); if(*pp!=0) { |
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| 7676 | bpr | 229 | p=find_tag_end(pp); goto restart; |
| 10 | reyssat | 230 | } |
| 231 | *find_tag(p,"/body")=0; *find_tag(p,"/html")=0; |
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| 232 | for(pp=strstr(p,"\n\n"); pp; pp=strstr(pp+1,"\n\n")) *pp=' '; |
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| 233 | for(pp=strchr(p,'<');pp!=NULL;pp=strchr(find_tag_end(pp),'<')) { |
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| 7676 | bpr | 234 | if(pp>p) {fwrite(p,1,pp-p,outf); p=pp;} |
| 235 | if(latex2html && strncasecmp(pp,"<br><hr>",8)==0 && |
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| 236 | *find_word_start(pp+8)==0) break; |
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| 237 | if(strncasecmp(pp+1,"!-- MATH",8)==0) { |
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| 238 | p2=strstr(pp+8,"-->"); if(p2==NULL) continue; |
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| 239 | *p2=0; getmath(pp+9); *p2='-'; |
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| 240 | p=p2+3; pt=find_word_start(p); |
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| 241 | if(mathbuf[0] && strncasecmp(pt,"<IMG",4)==0 && isspace(*(pt+4))) { |
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| 242 | p=find_tag_end(pt); pp=pt; |
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| 243 | fprintf(outf,"\\(%s\\)",mathbuf); |
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| 244 | } |
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| 245 | continue; |
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| 246 | } |
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| 247 | if(strncasecmp(pp+1,"a",1)==0 && isspace(*(pp+2))) { |
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| 10 | reyssat | 248 | |
| 7676 | bpr | 249 | |
| 250 | |||
| 251 | continue; |
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| 252 | } |
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| 253 | if(strncasecmp(pp+1,"img",3)==0 && isspace(*(pp+4))) { |
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| 254 | p2=find_tag_end(pp); |
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| 255 | if(p2-pp>=MAX_LINELEN-256) continue; |
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| 256 | memmove(buf,pp+1,p2-pp-2); buf[p2-pp-2]=0; |
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| 257 | pt=strstr(buf,"ALT=\""); if(pt==NULL) pt=strstr(buf,"alt=\""); |
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| 258 | if(pt!=NULL) { |
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| 259 | pt+=strlen("ALT=\""); |
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| 260 | getmath(pt); if(mathbuf[0]) { |
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| 261 | fprintf(outf,"\\(%s\\)",mathbuf); p=p2; |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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| 10 | reyssat | 265 | } |
| 266 | if(pp==NULL) fprintf(outf,"%s",p); |
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| 267 | } |
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| 268 | |||
| 269 | int main(int argc, char *argv[]) |
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| 270 | { |
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| 271 | char *p, *pp; |
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| 272 | char *mod; |
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| 273 | |||
| 274 | mod=getenv("w_module"); |
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| 275 | if(mod!=NULL && strncmp(mod,"adm/",4)!=0 && strcmp(mod,"home")!=0) return 1; |
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| 276 | if(mod==NULL) p=argv[1]; else p=getenv("wims_exec_parm"); |
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| 277 | if(p==NULL || *p==0) return 1; |
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| 278 | p=find_word_start(p); pp=find_word_end(p); |
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| 279 | if(pp<=p || pp-p>sizeof(fn1)-1) return 1; |
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| 280 | memmove(fn1,p,pp-p); fn1[pp-p]=0; |
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| 281 | p=find_word_start(pp); pp=find_word_end(p); |
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| 7676 | bpr | 282 | if(pp<=p || pp-p>sizeof(fn2)-1) ovlstrcpy(fn2,fn1); |
| 10 | reyssat | 283 | else {memmove(fn2,p,pp-p); fn2[pp-p]=0;} |
| 284 | prepare_file(); |
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| 285 | output(); |
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| 286 | fclose(outf); |
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| 287 | return 0; |
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| 288 | } |