diff options
Diffstat (limited to 'html/082persist.cc.html')
| -rw-r--r-- | html/082persist.cc.html | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/html/082persist.cc.html b/html/082persist.cc.html new file mode 100644 index 00000000..cf056dba --- /dev/null +++ b/html/082persist.cc.html @@ -0,0 +1,109 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.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"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; } +body { font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 1.05em; } +.cSpecial { color: #008000; } +.Constant { color: #00a0a0; } +.Comment { color: #9090ff; } +.Delimiter { color: #a04060; } +.Identifier { color: #804000; } +.PreProc { color: #c000c0; } +.CommentedCode { color: #6c6c6c; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment">//: Dead simple persistence.</span> +<span class="Comment">//: 'restore' - reads string from a file</span> +<span class="Comment">//: 'save' - writes string to a file</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +RESTORE<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +Recipe_ordinal[<span class="Constant">"restore"</span>] = RESTORE<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case RESTORE: <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> + raise << <span class="Constant">"restore: illegal operand "</span> << current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> + products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> + products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>new_string<span class="Delimiter">(</span>slurp<span class="Delimiter">(</span><span class="Constant">"lesson/"</span>+current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">)));</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</span> +string slurp<span class="Delimiter">(</span>const string& filename<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span class="CommentedCode">//? cerr << filename << '\n'; //? 1</span> + ostringstream result<span class="Delimiter">;</span> + ifstream fin<span class="Delimiter">(</span>filename<span class="Delimiter">.</span>c_str<span class="Delimiter">());</span> + fin<span class="Delimiter">.</span>peek<span class="Delimiter">();</span> + if <span class="Delimiter">(</span>!fin<span class="Delimiter">)</span> <span class="Identifier">return</span> result<span class="Delimiter">.</span>str<span class="Delimiter">();</span> <span class="Comment">// don't bother checking errno</span> + const int N = <span class="Constant">1024</span><span class="Delimiter">;</span> + char buf[N]<span class="Delimiter">;</span> + while <span class="Delimiter">(</span>!fin<span class="Delimiter">.</span>eof<span class="Delimiter">())</span> <span class="Delimiter">{</span> + bzero<span class="Delimiter">(</span>buf<span class="Delimiter">,</span> N<span class="Delimiter">);</span> + fin<span class="Delimiter">.</span>read<span class="Delimiter">(</span>buf<span class="Delimiter">,</span> N-<span class="Constant">1</span><span class="Delimiter">);</span> <span class="Comment">// leave at least one null</span> + result << buf<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + fin<span class="Delimiter">.</span>close<span class="Delimiter">();</span> +<span class="CommentedCode">//? cerr << "=> " << result.str(); //? 1</span> + <span class="Identifier">return</span> result<span class="Delimiter">.</span>str<span class="Delimiter">();</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +SAVE<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +Recipe_ordinal[<span class="Constant">"save"</span>] = SAVE<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case SAVE: <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> + raise << <span class="Constant">"save: illegal operand 0 "</span> << current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> + string filename = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">;</span> + if <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span> + ostringstream tmp<span class="Delimiter">;</span> + tmp << ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> + filename = tmp<span class="Delimiter">.</span>str<span class="Delimiter">();</span> + <span class="Delimiter">}</span> + ofstream fout<span class="Delimiter">((</span><span class="Constant">"lesson/"</span>+filename<span class="Delimiter">).</span>c_str<span class="Delimiter">());</span> + if <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)))</span> + raise << <span class="Constant">"save: illegal operand 1 "</span> << current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> + string contents = to_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span> + fout << contents<span class="Delimiter">;</span> + fout<span class="Delimiter">.</span>close<span class="Delimiter">();</span> + if <span class="Delimiter">(</span>!exists<span class="Delimiter">(</span><span class="Constant">"lesson/.git"</span><span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Comment">// bug in git: git diff -q messes up --exit-code</span> + int status = system<span class="Delimiter">(</span><span class="Constant">"cd lesson; git add .; git diff HEAD --exit-code >/dev/null || git commit -a -m . >/dev/null"</span><span class="Delimiter">);</span> + if <span class="Delimiter">(</span>status != <span class="Constant">0</span><span class="Delimiter">)</span> + raise << <span class="Constant">"error in commit: contents "</span> << contents << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</span> +bool exists<span class="Delimiter">(</span>const string& filename<span class="Delimiter">)</span> <span class="Delimiter">{</span> + struct stat dummy<span class="Delimiter">;</span> + <span class="Identifier">return</span> <span class="Constant">0</span> == stat<span class="Delimiter">(</span>filename<span class="Delimiter">.</span>c_str<span class="Delimiter">(),</span> &dummy<span class="Delimiter">);</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(before "End Includes")</span> +<span class="PreProc">#include</span><span class="Constant"><sys/stat.h></span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |