mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

about summary refs log tree commit diff stats

diff options

Diffstat (limited to 'apps/hest-life.mu')

0 files changed, 0 insertions, 0 deletions

56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267

// Read a tabular cross-reference file generated by ctags, then read a list of
// html files generated by Vim's TOhtml command on C++ code. Link words
// in the html files to cross-references from ctags.

// Usage:
//    linkify [tags file] [html files]...

// Still plenty of holes:
// - unnecessarily linking definition location to itself
//   - except SubX definitions, which start at start of line
// - can't detect strings in spite of attempt to support them below, because
//   Vim's generated html turns quotes into html entities
// - distinguishing function and variable names
// - distinguishing Mu code in C++ files
// - distinguishing between function overloads
//   - if there's duplicate tags we aren't smart enough to distinguish between
//     them yet, so we simply don't add any link at all
//   - but even that's not perfect, because sometimes the tags file has a
//     single definition but there's still multiple overloads (say I defined
//     'clear()' on some type, and it's already defined on STL classes)
// - ctags misses some symbols in layered code

#include<assert.h>

#include<map>
using std::map;

#include<string>
using std::string;

#include<iostream>
using std::istream;
using std::cout;
using std::cerr;

#include<sstream>
using std::istringstream;
using std::ostringstream;

#include<fstream>
using std::ifstream;
using std::ofstream;

#include <locale>
using std::isspace;  // unicode-aware

struct syminfo {
  string filename;
  int line_num;
  syminfo() :line_num(0) {}
};

bool has_data(istream& in) {
  in.peek();
  if (in.eof()) return false;
  assert(in);
  return true;
}

bool starts_with(const string& s, const string& pat) {
  string::const_iterator a=s.begin(), b=pat.begin();
  for (/*nada*/;  a!=s.end() && b!=pat.end();  ++a, ++b)
    if (*a != *b) return false;
  return b == pat.end();
}

bool ends_with(const string& s, const string& pat) {
  string::const_reverse_iterator a=s.rbegin(), b=pat.rbegin();
  for (/*nada*/;  a!=s.rend() && b!=pat.rend();  ++a, ++b)
    if (*a != *b) return false;
  return b == pat.rend();
}

void encode_some_html_entities(string& s) {
  std::string::size_type pos = 0;
  while (true) {
    pos = s.find_first_of("<>", pos);
    if (pos == std::string::npos) break;
    std::string replacement;
    switch (s.at(pos)) {
      case '<': replacement = "&lt;"; break;
      case '>': replacement = "&gt;"; break;
    }
    s.replace(pos, 1, replacement);
    pos += replacement.size();
  };
}

void read_tags(const string& filename, map<string, syminfo>& info) {
  ifstream in(filename.c_str());
//?   cerr << "reading " << filename << '\n';
  string dummy;
  while (has_data(in)) {
    string symbol;  in >> symbol;
    if (symbol == "operator") {
      // unsupported
      getline(in, dummy);  // skip
      continue;
    }
    encode_some_html_entities(symbol);
//?     cerr << symbol << '\n';
    if (info.find(symbol) != info.end()) {
      info[symbol].line_num = -1;
      info[symbol].filename.clear();
    }
    else {
      in >> dummy;
      in >> info[symbol].line_num;
      in >> info[symbol].filename;
    }
    getline(in, dummy);  // skip rest of line
//?     cerr << symbol << ": " << info[symbol].filename << ':' << info[symbol].line_num << '\n';
  }
  in.close();
}

void replace_tags_in_file(const string& filename, const map<string, syminfo>& info) {
//?   cerr << info.size() << " symbols\n";
  ifstream in(filename.c_str());
  ofstream out((filename+".out").c_str());
  while (has_data(in)) {
    // send lines that don't start with '<span' straight through
    string line;
    getline(in, line);
    if (!starts_with(line, "<span ")) {
      out << line << '\n';
    }
    else {
      static int span_size = string("</span>").size();
      int skip_first_span = line.find("</span>") + span_size;
      out << line.substr(0, skip_first_span);
      istringstream in2(line.substr(skip_first_span));
      in2 >> std::noskipws;
      // only in .subx files, refuse to linkify the first word on a line
      bool at_start_of_line = ends_with(filename, ".subx.html");
//?       cerr << filename << ": " << at_start_of_line << '\n';
      while (has_data(in2)) {
        if (isspace(in2.peek())) {
//?           cerr << "space\n";
          char c;  in2 >> c;
          out << c;
          at_start_of_line = false;
        }
        // within a line, send straight through all characters inside '<..>'
        else if (in2.peek() == '<') {
//?           cerr << "tag\n";
          char c = '\0';
          while (in2 >> c) {
//?             cerr << "span: " << c << '\n';
            out << c;
            if (c == '>') break;
          }
          // don't include initial tag when computing 'at_start_of_line'
//?           cerr << "end tag\n";
        }
        else {
          // send straight through all characters inside strings (handling escapes)
          char c = in2.get();
          if (c == '"') {
//?             cerr << "string\n";
            out << c;
            while (in2 >> c) {
              out << c;
              if (c == '\\') {
                in2 >> c;  out << c;
              }
              else if (c == '"') {
                break;
              }
            }
            at_start_of_line = false;
          }
          else if (c == '\'') {
//?             cerr << "character\n";
            out << c;
            while (in2 >> c) {
              out << c;
              if (c == '\\') {
                in2 >> c;  out << c;
              }
              else if (c == '\'') {
                break;
              }
            }
            at_start_of_line = false;
          }
          // send straight through any characters after '#' (comments)
          else if (c == '#') {
//?             cerr << "comment\n";
            out << c;
            while (in2 >> c) out << c;
            at_start_of_line = false;
          }
          // send straight through any characters after '//' (comments)
          else if (c == '/' && in2.peek() == '/') {
//?             cerr << "comment\n";
            out << c;
            while (in2 >> c) out << c;
            at_start_of_line = false;
          }
          // send through open parens at start of line
          else if (c == '(') {
            out << c;
            at_start_of_line = false;
          }
          else if (c == ')') {
            out << c;
            at_start_of_line = false;
          }
          else {
//?             cerr << "rest\n";
            if (c == ',' || c == ':') {
              out << c;
              at_start_of_line = false;
              continue;
            }
            ostringstream out2;
            out2 << c;
            while (in2 >> c) {
              if (isspace(c) || c == '<' || c == '"' || c == '\'' || c == '/' || c == ',' || c == ':' || c == '(' || c == ')') {  // keep sync'd with other clauses above
                in2.putback(c);
                break;
              }
              out2 << c;
            }
            string symbol = out2.str();
            if (symbol == "equal" || symbol == "index" || symbol == "put-index" || symbol == "length") {
//?               cerr << "  blacklisted\n";
              out << symbol;
            }
            else if (info.find(symbol) == info.end()) {
//?               cerr << "  no info\n";
              out << symbol;
            }
            else {
              const syminfo& s = info.find(symbol)->second;
              if (s.filename.empty()) {
//?                 cerr << "  empty info\n";
                out << symbol;
              }
              else {
                if (at_start_of_line) {
//?                   cerr << "  at start of line; refusing to linkify " << symbol << "\n";
                  out << symbol;
                }
                else {
//?                   cerr << "  link\n";
                  out << "<a href='" << s.filename << ".html#L" << s.line_num << "'>" << symbol << "</a>";
                }
              }
            }
          }  // end rest
        }
      }  // done parsing line
      out << '\n';
    }
  }
  in.close();  out.close();
}

int main(int argc, const char* argv[]) {
  map<string, syminfo> info;
  read_tags(argv[1], info);
  for (int i = 2;  i < argc;  ++i)
    replace_tags_in_file(argv[i], info);
  return 0;
}


context:
space:
mode: