From 5e527213a2430bb3018e5eebd909aef294edf9b5 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Fri, 18 Dec 2020 18:48:46 +0300
Subject: Switch to build2

---
 xsd/xsd/type-map/lexer.cxx | 131 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 xsd/xsd/type-map/lexer.cxx

(limited to 'xsd/xsd/type-map/lexer.cxx')

diff --git a/xsd/xsd/type-map/lexer.cxx b/xsd/xsd/type-map/lexer.cxx
new file mode 100644
index 0000000..ae318d1
--- /dev/null
+++ b/xsd/xsd/type-map/lexer.cxx
@@ -0,0 +1,131 @@
+// file      : xsd/type-map/lexer.cxx
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#include <iostream>
+
+#include <xsd/type-map/lexer.hxx>
+
+using std::wcerr;
+using std::endl;
+
+namespace TypeMap
+{
+  Lexer::Lexer (std::istream& is, String const& path)
+      : locale_ ("C"), is_ (is), path_ (path), line_ (1), comment_ (false)
+  {
+    is_.exceptions (std::ios_base::badbit);
+  }
+
+  Lexer::Token Lexer::
+  next ()
+  {
+    if (held_lexeme_)
+    {
+      Token t (Token::punct, held_lexeme_, line_);
+      held_lexeme_.clear ();
+      return t;
+    }
+
+    typedef std::char_traits<char> Traits;
+    typedef Traits::char_type CharType;
+    typedef Traits::int_type IntType;
+
+    IntType i;
+    CharType c ('\0');
+    NarrowString lexeme;
+
+    // Skip all whitespaces including comments.
+    //
+    while (!is_.eof ())
+    {
+      i = is_.get ();
+
+      if (i == Traits::eof ())
+        break;
+
+      c = Traits::to_char_type (i);
+
+      if (comment_)
+      {
+        if (c == '\n')
+          comment_ = false;
+      }
+      else
+      {
+        if (!(std::isspace (c, locale_) || c == '#'))
+          break;
+
+        if (c == '#')
+          comment_ = true;
+      }
+
+      if (c == '\n')
+        ++line_;
+    }
+
+    if (is_.eof ())
+      return Token (Token::eos, L"<end-of-stream>", line_);
+
+    bool quote (c == '"');
+
+    if (!quote)
+      lexeme += c;
+
+    if (c != ';' && c != '{' && c != '}')
+    {
+      // Accumulate non-whitespace character sequence.
+      //
+
+      while (!is_.eof ())
+      {
+        i = is_.get ();
+
+        if (i == Traits::eof ())
+          break;
+
+        c = Traits::to_char_type (i);
+
+        if (!quote && c == '#')
+        {
+          comment_ = true;
+          break;
+        }
+
+        if (std::isspace (c, locale_))
+        {
+          if (c == '\n')
+            ++line_;
+
+          if (!quote)
+            break;
+        }
+
+        if (!quote && (c == ';' || c == '{' || c == '}'))
+        {
+          held_lexeme_ += c;
+          break;
+        }
+
+        if (quote && c == '"')
+          break;
+
+        lexeme += c;
+      }
+
+      if (quote && c != '"')
+      {
+        wcerr << path_ << ":" << line_ << ": error: closing '\"' expected"
+              << endl;
+
+        throw Failed ();
+      }
+    }
+
+    if (!quote && (lexeme == ";" || lexeme == "{" || lexeme == "}"))
+    {
+      return Token (Token::punct, lexeme, line_);
+    }
+    else
+      return Token (Token::token, lexeme, line_);
+  }
+}
-- 
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