Fossil

  rid = db_int(0, "SELECT rid FROM vcache"
                  " WHERE vid=%d AND fname=%Q", vid, zName);
  if( rid && content_get(rid, pContent)==0 ){
    rid = 0;
  }
  return rid;
}

/*
** Check to verify that z[i] is contained within HTML markup.
**
** This works by looking backwards in the string for the most recent
** '<' or '>' character.  If a '<' is found first, then we assume that
** z[i] is within markup.  If a '>' is seen or neither character is seen,
** then z[i] is not within markup.
*/
static int isWithinHtmlMarkup(const char *z, int i){
  while( i>=0 && z[i]!='>' && z[i]!='<' ){ i--; }
  return z[i]=='<';
}

/*
** Check to see if z[i] is contained within an href='...' of markup.
*/
static int isWithinHref(const char *z, int i){
  while( i>5
     && !fossil_isspace(z[i])
     && z[i]!='\'' && z[i]!='"'
     && z[i]!='>'
  ){ i--; }
  if( i<=6 ) return 0;
  if( z[i]!='\'' && z[i]!='\"' ) return 0;
  if( strncmp(&z[i-5],"href=",5)!=0 ) return 0;
  if( !fossil_isspace(z[i-6]) ) return 0;
  return 1;
}

/*
** Transfer content to the output.  During the transfer, when text of
** the following form is seen:
**
**       href="$ROOT/
**       action="$ROOT/

  for(base=0, i=7; i<n; i++){
    if( z[i]=='$'
     && strncmp(&z[i],"$ROOT/", 6)==0
     && (z[i-1]=='\'' || z[i-1]=='"')
     && i-base>=9
     && ((fossil_strnicmp(&z[i-6],"href=",5)==0 && fossil_isspace(z[i-7])) ||
         (fossil_strnicmp(&z[i-8],"action=",7)==0 && fossil_isspace(z[i-9])) )
     && isWithinHtmlMarkup(z, i-6)
    ){
      blob_append(cgi_output_blob(), &z[base], i-base);
      blob_appendf(cgi_output_blob(), "%R");
      base = i+5;
    }else
    if( z[i]=='$'
     && strncmp(&z[i-5],"/doc/$SELF/", 11)==0
     && isWithinHref(z,i-5)
     && isWithinHtmlMarkup(z, i-5)
     && strncmp(g.zPath, "doc/",4)==0
    ){
      int j;
      for(j=4; g.zPath[j] && g.zPath[j]!='/'; j++){}
      blob_append(cgi_output_blob(), &z[base], i-base);
      blob_appendf(cgi_output_blob(), "%.*s", j-4, g.zPath+4);
      base = i+5;
    }
  }
  blob_append(cgi_output_blob(), &z[base], i-base);
}

/*
** Render a document as the reply to the HTTP request.  The body