1 files changed, 145 insertions, 0 deletions
diff --git a/src/ParameterizedStringParser.cc b/src/ParameterizedStringParser.cc
new file mode 100644
index 00000000..4eef3574
--- /dev/null
+++ b/src/ParameterizedStringParser.cc
@@ -0,0 +1,145 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "ParameterizedStringParser.h"
+#include "FatalException.h"
+#include "Util.h"
+#include "PStringSegment.h"
+#include "PStringSelect.h"
+#include "PStringNumLoop.h"
+#include "NumberDecorator.h"
+#include "FixedWidthNumberDecorator.h"
+#include "AlphaNumberDecorator.h"
+
+PStringDatumHandle ParameterizedStringParser::parse(const string& src)
+{
+  int32_t offset = 0;
+  return diggPString(src, offset);
+}
+
+PStringDatumHandle ParameterizedStringParser::diggPString(const string& src,
+							  int32_t& offset)
+{
+  if(src.size() == (size_t)offset) {
+    return 0;
+  }
+  switch(src[offset]) {
+  case '[':
+    return createLoop(src, offset);
+  case '{':
+    return createSelect(src, offset);
+  default:
+    return createSegment(src, offset);
+  } 
+}
+
+PStringDatumHandle ParameterizedStringParser::createSegment(const string& src,
+							    int32_t& offset)
+{
+  string::size_type nextDelimiterIndex = src.find_first_of("[{", offset);
+  if(nextDelimiterIndex == string::npos) {
+    nextDelimiterIndex = src.size();
+  }
+  string value = src.substr(offset, nextDelimiterIndex-offset);
+  offset = nextDelimiterIndex;
+  PStringDatumHandle next = diggPString(src, offset);
+  return new PStringSegment(value, next);
+}
+
+PStringDatumHandle ParameterizedStringParser::createSelect(const string& src,
+							   int32_t& offset)
+{
+  ++offset;
+  string::size_type rightParenIndex = src.find("}", offset);
+  if(rightParenIndex == string::npos) {
+    throw new FatalException("Missing '}' in the parameterized string.");
+  }
+  Strings values;
+  Util::slice(values, src.substr(offset, rightParenIndex-offset), ',', true);
+  if(values.empty()) {
+    throw new FatalException("Empty {} is not allowed.");
+  }
+  offset = rightParenIndex+1;
+  PStringDatumHandle next = diggPString(src, offset);
+  return new PStringSelect(values, next);
+}
+
+PStringDatumHandle ParameterizedStringParser::createLoop(const string& src,
+							 int32_t& offset)
+{
+  ++offset;
+  string::size_type rightParenIndex = src.find("]", offset);
+  if(rightParenIndex == string::npos) {
+    throw new FatalException("Missing ']' in the parameterized string.");
+  }
+  string loopStr = src.substr(offset, rightParenIndex-offset);
+  offset = rightParenIndex+1;
+
+  int32_t step = 1;
+  string::size_type colonIndex = loopStr.find(":");
+  if(colonIndex != string::npos) {
+    string stepStr = loopStr.substr(colonIndex+1);
+    if(Util::isNumber(stepStr)) {
+      step = strtol(stepStr.c_str(), 0, 10);
+    } else {
+      throw new FatalException("A step count must be a number.");
+    }
+    loopStr.erase(colonIndex);
+  }
+  pair<string, string> range = Util::split(loopStr, "-");
+  if(range.first == "" || range.second == "") {
+    throw new FatalException("Loop range missing.");
+  }
+  NumberDecoratorHandle nd = 0;
+  int32_t start;
+  int32_t end;
+  if(Util::isNumber(range.first) && Util::isNumber(range.second)) {
+    nd = new FixedWidthNumberDecorator(range.first.size());
+    start = strtol(range.first.c_str(), 0, 10);
+    end = strtol(range.second.c_str(), 0, 10);
+  } else if(Util::isLowercase(range.first) && Util::isLowercase(range.second)) {
+    nd = new AlphaNumberDecorator(range.first.size());
+    start = Util::alphaToNum(range.first);
+    end = Util::alphaToNum(range.second);
+  } else if(Util::isUppercase(range.first) && Util::isUppercase(range.second)) {
+    nd = new AlphaNumberDecorator(range.first.size(), true);
+    start = Util::alphaToNum(range.first);
+    end = Util::alphaToNum(range.second);
+  } else {
+    throw new FatalException("Invalid loop range.");
+  }
+
+  PStringDatumHandle next = diggPString(src, offset);
+  return new PStringNumLoop(start, end, step, nd, next);
+}