From ecfa1730f5967c1ca991f62213353c161f1967a6 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Wed, 19 May 2010 16:14:04 -0400
Subject: [PATCH] created replacement system for templates ("{%word%}" syntax)

---
 Parser.cc      | 43 +++++++++++++++++++++++++++++++++++++++++--
 Parser.h       |  2 ++
 tmpl/parser.cc | 15 ++++++++++++++-
 3 files changed, 57 insertions(+), 3 deletions(-)

diff --git a/Parser.cc b/Parser.cc
index d15e0a4..e1063fe 100644
--- a/Parser.cc
+++ b/Parser.cc
@@ -50,18 +50,57 @@ bool Parser::write(const string & fname)
     refptr<string> tokenlist = buildTokenList();
     writeDefine(header, "I_TOKENLIST", *tokenlist);
     header << endl;
-    header.write((const char *) tmpl_parser_h, tmpl_parser_h_len);
+    writeTmpl(header, (char *) tmpl_parser_h, tmpl_parser_h_len);
 
     /* write the body */
     writeDefine(body, "I_HEADER_NAME", string("\"") + header_fname + "\"");
     body << endl;
-    body.write((const char *) tmpl_parser_cc, tmpl_parser_cc_len);
+    writeTmpl(body, (char *) tmpl_parser_cc, tmpl_parser_cc_len);
 
     header.close();
     body.close();
     return true;
 }
 
+bool Parser::writeTmpl(std::ostream & out, char * dat, int len)
+{
+    char * newline;
+    char * data = dat;
+    const char * errptr;
+    int erroffset;
+    data[len-1] = '\n';
+    const int ovec_size = 6;
+    int ovector[ovec_size];
+    pcre * replace = pcre_compile("{%(\\w+)%}", 0, &errptr, &erroffset, NULL);
+    while (data < (dat + len) && (newline = strstr(data, "\n")) != NULL)
+    {
+        if (pcre_exec(replace, NULL, data, newline - data,
+                    0, 0, ovector, ovec_size) >= 0)
+        {
+            if (ovector[0] > 0)
+            {
+                out.write(data, ovector[0]);
+            }
+            out << getTmplReplacement(string(data, ovector[2],
+                        ovector[3] - ovector[2]));
+            if (ovector[1] < newline - data)
+            {
+                out.write(data + ovector[1], newline - data - ovector[1]);
+            }
+        }
+        else
+        {
+            out.write(data, newline - data);
+        }
+        out << '\n';
+        data = newline + 1;
+    }
+}
+
+std::string Parser::getTmplReplacement(const std::string & name)
+{
+}
+
 refptr<string> Parser::buildTokenList()
 {
     refptr<string> tokenlist = new string();
diff --git a/Parser.h b/Parser.h
index 16bb0d4..f63025b 100644
--- a/Parser.h
+++ b/Parser.h
@@ -23,6 +23,8 @@ class Parser
             m_rules.push_back(rd);
         }
         bool write(const std::string & fname);
+        bool writeTmpl(std::ostream & out, char * dat, int len);
+        std::string getTmplReplacement(const std::string & name);
         bool parseInputFile(char * buff, int size);
 
         void setClassName(const std::string & cn) { m_classname = cn; }
diff --git a/tmpl/parser.cc b/tmpl/parser.cc
index dbdab6d..9579764 100644
--- a/tmpl/parser.cc
+++ b/tmpl/parser.cc
@@ -18,6 +18,16 @@ I_CLASSNAME::I_CLASSNAME()
 {
 }
 
+static TokenRef buildToken(int typeindex)
+{
+    TokenRef token;
+    switch (typeindex)
+    {
+//%buildToken%
+    }
+    return token;
+}
+
 static void read_istream(istream & i, vector<char> & buff, int & size)
 {
     size = 0;
@@ -111,12 +121,15 @@ bool I_CLASSNAME::parse(istream & i)
         }
         if (longest_match_index >= 0)
         {
-            cout << "Matched a " << tokens[longest_match_index].name << endl;
+            MatchesRef matches = new Matches(tokens[longest_match_index].re,
+                    &buff[0], ovector, ovector_size);
+            TokenRef token = buildToken(longest_match_index);
             buff_pos += longest_match_length;
         }
         else
         {
             /* no pattern matched the input at the current position */
+            cerr << "Parse error" << endl;
             return false;
         }
     }