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w.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Mu - 082persist.cc</title> <meta name="Generator" content="Vim/7.4"> <meta name="plugin-version" content="vim7.4_v1"> <meta name="syntax" content="cpp"> <meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> <meta name="colorscheme" content="minimal"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body> <pre id='vimCodeElement'> //: Dead simple persistence. //: 'restore' - reads string from a file //: 'save' - writes string to a file :(before "End Primitive Recipe Declarations") RESTORE, :(before "End Primitive Recipe Numbers") Recipe_ordinal["restore"] = RESTORE; :(before "End Primitive Recipe Implementations") case RESTORE: { if (!scalar(ingredients.at(0))) raise << "restore: illegal operand " << current_instruction().ingredients.at(0).to_string() << '\n'; products.resize(1); products.at(0).push_back(new_string(slurp("lesson/"+current_instruction().ingredients.at(0).name))); break; } :(code) string slurp(const string& filename) { //? cerr << filename << '\n'; //? 1 ostringstream result; ifstream fin(filename.c_str()); fin.peek(); if (!fin) return result.str(); // don't bother checking errno const int N = 1024; char buf[N]; while (!fin.eof()) { bzero(buf, N); fin.read(buf, N-1); // leave at least one null result << buf; } fin.close(); //? cerr << "=> " << result.str(); //? 1 return result.str(); } :(before "End Primitive Recipe Declarations") SAVE, :(before "End Primitive Recipe Numbers") Recipe_ordinal["save"] = SAVE; :(before "End Primitive Recipe Implementations") case SAVE: { if (!scalar(ingredients.at(0))) raise << "save: illegal operand 0 " << current_instruction().ingredients.at(0).to_string() << '\n'; string filename = current_instruction().ingredients.at(0).name; if (!is_literal(current_instruction().ingredients.at(0))) { ostringstream tmp; tmp << ingredients.at(0).at(0); filename = tmp.str(); } ofstream fout(("lesson/"+filename).c_str()); if (!scalar(ingredients.at(1))) raise << "save: illegal operand 1 " << current_instruction().ingredients.at(1).to_string() << '\n'; string contents = to_string(ingredients.at(1).at(0)); fout << contents; fout.close(); if (!exists("lesson/.git")) break; // bug in git: git diff -q messes up --exit-code int status = system("cd lesson; git add .; git diff HEAD --exit-code >/dev/null || git commit -a -m . >/dev/null"); if (status != 0) raise << "error in commit: contents " << contents << '\n'; break; } :(code) bool exists(const string& filename) { struct stat dummy; return 0 == stat(filename.c_str(), &dummy); } :(before "End Includes") #include<sys/stat.h> </pre> </body> </html>