Many changes.

1 files changed, 222 insertions, 0 deletions

diff --git a/src/driver/option.cc b/src/driver/option.cc
new file mode 100644
index 00000000..0b7f7ef9
--- /dev/null
+++ b/src/driver/option.cc
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2003-2007, John Wiegley.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "option.h"
+
+namespace ledger {
+
+namespace {
+  typedef tuple<xml::xpath_t::ptr_op_t, bool> op_bool_tuple;
+
+  op_bool_tuple find_option(xml::xpath_t::scope_t& scope, const string& name)
+  {
+    char buf[128];
+    std::strcpy(buf, "option_");
+    char * p = &buf[7];
+    for (const char * q = name.c_str(); *q; q++) {
+      if (*q == '-')
+	*p++ = '_';
+      else
+	*p++ = *q;
+    }
+    *p = '\0';
+
+    xml::xpath_t::ptr_op_t op = scope.lookup(buf);
+    if (op)
+      return op_bool_tuple(op, false);
+
+    *p++ = '_';
+    *p = '\0';
+
+    return op_bool_tuple(scope.lookup(buf), true);
+  }
+
+  op_bool_tuple find_option(xml::xpath_t::scope_t& scope, const char letter)
+  {
+    char buf[10];
+    std::strcpy(buf, "option_");
+    buf[7] = letter;
+    buf[8] = '\0';
+
+    xml::xpath_t::ptr_op_t op = scope.lookup(buf);
+    if (op)
+      return op_bool_tuple(op, false);
+
+    buf[8] = '_';
+    buf[9] = '\0';
+
+    return op_bool_tuple(scope.lookup(buf), true);
+  }
+
+  void process_option(const xml::xpath_t::function_t& opt,
+		      xml::xpath_t::scope_t& scope, const char * arg)
+  {
+#if 0
+    try {
+#endif
+      xml::xpath_t::call_scope_t args(scope);
+      if (arg)
+	args.push_back(value_t(arg, true));
+
+      opt(args);
+#if 0
+    }
+    catch (error * err) {
+      err->context.push_back
+	(new error_context
+	 (string("While parsing option '--") + opt->long_opt +
+	  "'" + (opt->short_opt != '\0' ?
+		 (string(" (-") + opt->short_opt + "):") : ":")));
+      throw err;
+    }
+#endif
+  }
+}
+
+void process_option(const string& name, xml::xpath_t::scope_t& scope,
+		    const char * arg)
+{
+  op_bool_tuple opt(find_option(scope, name));
+  if (opt.get<0>())
+    process_option(opt.get<0>()->as_function(), scope, arg);
+}
+
+void process_environment(const char ** envp, const string& tag,
+			 xml::xpath_t::scope_t& scope)
+{
+  const char * tag_p   = tag.c_str();
+  unsigned int tag_len = tag.length();
+
+  for (const char ** p = envp; *p; p++)
+    if (! tag_p || std::strncmp(*p, tag_p, tag_len) == 0) {
+      char   buf[128];
+      char * r = buf;
+      const char * q;
+      for (q = *p + tag_len;
+	   *q && *q != '=' && r - buf < 128;
+	   q++)
+	if (*q == '_')
+	  *r++ = '-';
+	else
+	  *r++ = std::tolower(*q);
+      *r = '\0';
+
+      if (*q == '=') {
+#if 0
+	try {
+#endif
+	  process_option(string(buf), scope, q + 1);
+#if 0
+	}
+	catch (error * err) {
+	  err->context.push_back
+	    (new error_context
+	     (string("While parsing environment variable option '") +
+	      *p + "':"));
+	  throw err;
+	}
+#endif
+      }
+    }
+}
+
+void process_arguments(int argc, char ** argv, const bool anywhere,
+		       xml::xpath_t::scope_t& scope,
+		       std::list<string>& args)
+{
+  for (char ** i = argv; *i; i++) {
+    if ((*i)[0] != '-') {
+      if (anywhere) {
+	args.push_back(*i);
+	continue;
+      } else {
+	for (; *i; i++)
+	  args.push_back(*i);
+	break;
+      }
+    }
+
+    // --long-option or -s
+    if ((*i)[1] == '-') {
+      if ((*i)[2] == '\0')
+	break;
+
+      char * name  = *i + 2;
+      char * value = NULL;
+      if (char * p = std::strchr(name, '=')) {
+	*p++ = '\0';
+	value = p;
+      }
+
+      op_bool_tuple opt(find_option(scope, name));
+      if (! opt.get<0>())
+	throw_(option_error, "illegal option --" << name);
+
+      if (opt.get<1>() && value == NULL) {
+	value = *++i;
+	if (value == NULL)
+	  throw_(option_error, "missing option argument for --" << name);
+      }
+      process_option(opt.get<0>()->as_function(), scope, value);
+    }
+    else if ((*i)[1] == '\0') {
+      throw_(option_error, "illegal option -");
+    }
+    else {
+      typedef tuple<xml::xpath_t::ptr_op_t, bool, char> op_bool_char_tuple;
+
+      std::list<op_bool_char_tuple> option_queue;
+
+      int x = 1;
+      for (char c = (*i)[x]; c != '\0'; x++, c = (*i)[x]) {
+	op_bool_tuple opt(find_option(scope, c));
+	if (! opt.get<0>())
+	  throw_(option_error, "illegal option -" << c);
+
+	option_queue.push_back
+	  (op_bool_char_tuple(opt.get<0>(), opt.get<1>(), c));
+      }
+
+      foreach (op_bool_char_tuple& o, option_queue) {
+	char * value = NULL;
+	if (o.get<1>()) {
+	  value = *++i;
+	  if (value == NULL)
+	    throw_(option_error,
+		   "missing option argument for -" << o.get<2>());
+	}
+	process_option(o.get<0>()->as_function(), scope, value);
+      }
+    }
+  }
+}
+
+} // namespace ledger