Adding upstream version 2.4.1.upstream/2.4.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1445 insertions, 0 deletions

diff --git a/src/lib/log/compiler/Makefile.am b/src/lib/log/compiler/Makefile.am
new file mode 100644
index 0000000..ff414b8
--- /dev/null
+++ b/src/lib/log/compiler/Makefile.am
@@ -0,0 +1,24 @@
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diff --git a/src/lib/log/compiler/Makefile.in b/src/lib/log/compiler/Makefile.in
new file mode 100644
index 0000000..38c37b0
--- /dev/null
+++ b/src/lib/log/compiler/Makefile.in
@@ -0,0 +1,878 @@
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+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lib/log/compiler/message.cc b/src/lib/log/compiler/message.cc
new file mode 100644
index 0000000..8f19c5a
--- /dev/null
+++ b/src/lib/log/compiler/message.cc
@@ -0,0 +1,543 @@
+// Copyright (C) 2011-2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <cctype>
+#include <cstddef>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <errno.h>
+#include <getopt.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <exceptions/exceptions.h>
+
+#include <util/filename.h>
+#include <util/strutil.h>
+
+#include <log/log_messages.h>
+#include <log/message_dictionary.h>
+#include <log/message_exception.h>
+#include <log/message_reader.h>
+
+#include <log/logger.h>
+
+#include <boost/foreach.hpp>
+
+using namespace std;
+using namespace isc::log;
+using namespace isc::util;
+
+/// \file log/compiler/message.cc
+/// \brief Message Compiler
+///
+/// \b Overview<BR>
+/// This is the program that takes as input a message file and produces:
+///
+/// \li A .h file containing message definition
+/// \li A .cc file containing code that adds the messages to the program's
+/// message dictionary at start-up time.
+///
+/// \b Invocation<BR>
+/// The program is invoked with the command:
+///
+/// <tt>kea-msg-compiler [-v | -h | -d &lt;dir&gt; | <message-file>]</tt>
+///
+/// It reads the message file and writes out two files of the same
+/// name in the current working directory (unless -d is used) but
+/// with extensions of .h and .cc.
+///
+/// -v causes it to print the version number and exit. -h prints a
+/// help message (and exits). -d &lt;dir&gt; will make it write the
+/// output file(s) to dir instead of current working directory
+
+/// \brief Print Version
+///
+/// Prints the program's version number.
+
+void
+version() {
+    cout << VERSION << "\n";
+}
+
+/// \brief Print Usage
+///
+/// Prints program usage to stdout.
+
+void
+usage() {
+    cout <<
+        "Usage: kea-msg-compiler [-h] [-v] [-d dir] <message-file>\n" <<
+        "\n" <<
+        "-h       Print this message and exit\n" <<
+        "-v       Print the program version and exit\n" <<
+        "-d <dir> Place output files in given directory\n" <<
+        "\n" <<
+        "<message-file> is the name of the input message file.\n";
+}
+
+/// \brief Create Header Sentinel
+///
+/// Given the name of a file, create an \#ifdef sentinel name.  The name is
+/// &lt;name&gt;_&lt;ext&gt;, where &lt;name&gt; is the name of the file, and &lt;ext&gt;
+/// is the extension less the leading period.  The sentinel will be upper-case.
+///
+/// \param file Filename object representing the file.
+///
+/// \return Sentinel name
+
+string
+sentinel(Filename& file) {
+
+    string name = file.name();
+    string ext = file.extension();
+    string sentinel_text = name + "_" + ext.substr(1);
+    isc::util::str::uppercase(sentinel_text);
+    return (sentinel_text);
+}
+
+/// \brief Quote String
+///
+/// Inserts an escape character (a backslash) prior to any double quote
+/// characters.  This is used to handle the fact that the input file does not
+/// contain quotes, yet the string will be included in a C++ literal string.
+
+string
+quoteString(const string& instring) {
+
+    // Create the output string and reserve the space needed to hold the input
+    // string. (Most input strings will not contain quotes, so this single
+    // reservation should be all that is needed.)
+    string outstring;
+    outstring.reserve(instring.size());
+
+    // Iterate through the input string, preceding quotes with a slash.
+    for (size_t i = 0; i < instring.size(); ++i) {
+        if (instring[i] == '"') {
+            outstring += '\\';
+        }
+        outstring += instring[i];
+    }
+
+    return (outstring);
+}
+
+/// \brief Sorted Identifiers
+///
+/// Given a dictionary, return a vector holding the message IDs in sorted
+/// order.
+///
+/// \param dictionary Dictionary to examine
+///
+/// \return Sorted list of message IDs
+
+vector<string>
+sortedIdentifiers(MessageDictionary& dictionary) {
+    vector<string> ident;
+
+    for (MessageDictionary::const_iterator i = dictionary.begin();
+         i != dictionary.end(); ++i) {
+        ident.push_back(i->first);
+    }
+    sort(ident.begin(), ident.end());
+
+    return (ident);
+}
+
+/// \brief Split Namespace
+///
+/// The $NAMESPACE directive may well specify a namespace in the form a::b.
+/// Unfortunately, the C++ "namespace" statement can only accept a single
+/// string - to set up the namespace of "a::b" requires two statements, one
+/// for "namespace a" and the other for "namespace b".
+///
+/// This function returns the set of namespace components as a vector of
+/// strings.  A vector of one element, containing the empty string, is returned
+/// if the anonymous namespace is specified.
+///
+/// \param ns Argument to $NAMESPACE (passed by value, as we will be modifying
+/// it.)
+
+vector<string>
+splitNamespace(string ns) {
+
+    // Namespaces components are separated by double colon characters -
+    // convert to single colons.
+    size_t dcolon;
+    while ((dcolon = ns.find("::")) != string::npos) {
+        ns.replace(dcolon, 2, ":");
+    }
+
+    // ... and return the vector of namespace components split on the single
+    // colon.
+    return (isc::util::str::tokens(ns, ":"));
+}
+
+/// \brief Write Opening Namespace(s)
+///
+/// Writes the lines listing the namespaces in use.
+void
+writeOpeningNamespace(ostream& output, const vector<string>& ns) {
+    if (!ns.empty()) {
+
+        // Output namespaces in correct order
+        for (vector<string>::size_type i = 0; i < ns.size(); ++i) {
+            output << "namespace " << ns[i] << " {\n";
+        }
+        output << "\n";
+    }
+}
+
+/// \brief Write Closing Namespace(s)
+///
+/// Writes the lines listing the namespaces in use.
+void
+writeClosingNamespace(ostream& output, const vector<string>& ns) {
+    if (!ns.empty()) {
+        for (int i = ns.size() - 1; i >= 0; --i) {
+            output << "} // namespace " << ns[i] << "\n";
+        }
+        output << "\n";
+    }
+}
+
+/// \brief Write Header File
+///
+/// Writes the C++ header file containing the symbol definitions.  These are
+/// "extern" references to definitions in the .cc file.  As such, they should
+/// take up no space in the module in which they are included, and redundant
+/// references should be removed by the compiler.
+///
+/// \param file Name of the message file.  The header file is written to a
+/// file of the same name but with a .h suffix.
+/// \param ns_components Namespace in which the definitions are to be placed.
+/// An empty string indicates no namespace.
+/// \param dictionary Dictionary holding the message definitions.
+/// \param output_directory if not null NULL, output files are written
+///     to the given directory. If NULL, they are written to the current
+///     working directory.
+void
+writeHeaderFile(const string& file,
+                const vector<string>& ns_components,
+                MessageDictionary& dictionary,
+                const char* output_directory) {
+    Filename message_file(file);
+    Filename header_file(Filename(message_file.name()).useAsDefault(".h"));
+    if (output_directory != NULL) {
+        header_file.setDirectory(output_directory);
+    }
+
+    // Text to use as the sentinels.
+    string sentinel_text = sentinel(header_file);
+
+    // zero out the errno to be safe
+    errno = 0;
+
+    // Open the output file for writing
+    ofstream hfile(header_file.fullName().c_str());
+
+    if (hfile.fail()) {
+        isc_throw_4(MessageException, "Failed to open output file",
+                    LOG_OPEN_OUTPUT_FAIL, header_file.fullName(),
+                    strerror(errno), 0);
+    }
+
+    // Write the header preamble.  If there is an error, we'll pick it up
+    // after the last write.
+
+    hfile <<
+        "// File created from " << message_file.fullName() << "\n" <<
+         "\n" <<
+         "#ifndef " << sentinel_text << "\n" <<
+         "#define "  << sentinel_text << "\n" <<
+         "\n" <<
+         "#include <log/message_types.h>\n" <<
+         "\n";
+
+    // Write the message identifiers, bounded by a namespace declaration
+    writeOpeningNamespace(hfile, ns_components);
+
+    vector<string> idents = sortedIdentifiers(dictionary);
+    for (vector<string>::const_iterator j = idents.begin();
+        j != idents.end(); ++j) {
+        hfile << "extern const isc::log::MessageID " << *j << ";\n";
+    }
+    hfile << "\n";
+
+    writeClosingNamespace(hfile, ns_components);
+
+    // ... and finally the postamble
+    hfile << "#endif // " << sentinel_text << "\n";
+
+    // Report errors (if any) and exit
+    if (hfile.fail()) {
+        isc_throw_4(MessageException, "Error writing to output file",
+                    LOG_WRITE_ERROR, header_file.fullName(), strerror(errno),
+                    0);
+    }
+
+    hfile.close();
+}
+
+/// \brief Convert Non Alpha-Numeric Characters to Underscores
+///
+/// Simple function for use in a call to transform
+char
+replaceNonAlphaNum(char c) {
+    return (isalnum(c) ? c : '_');
+}
+
+/// \brief Write Program File
+///
+/// Writes the C++ source code file.  This defines the text of the message
+/// symbols, as well as the initializer object that sets the entries in the
+/// global dictionary.
+///
+/// The construction of the initializer object loads the dictionary with the
+/// message text.  However, nothing actually references it.  If the initializer
+/// were in a file by itself, the lack of things referencing it would cause the
+/// linker to ignore it when pulling modules out of the logging library in a
+/// static link.  By including it in the file with the symbol definitions, the
+/// module will get included in the link process to resolve the symbol
+/// definitions, and so the initializer object will be included in the final
+/// image. (Note that there are no such problems when the logging library is
+/// built as a dynamically-linked library: the whole library - including the
+/// initializer module - gets mapped into address space when the library is
+/// loaded, after which all the initializing code (including the constructors
+/// of objects declared outside functions) gets run.)
+///
+/// There _may_ be a problem when we come to port this to Windows.  Microsoft
+/// Visual Studio contains a "Whole Program Optimization" option, where the
+/// optimization is done at link-time, not compiler-time.  In this it _may_
+/// decide to remove the initializer object because of a lack of references
+/// to it.  But until BIND-10 is ported to Windows, we won't know.
+///
+/// \param file Name of the message file.  The header file is written to a
+/// file of the same name but with a .h suffix.
+/// \param ns_components Namespace in which the definitions are to be placed.
+/// An empty string indicates no namespace.
+/// \param dictionary Dictionary holding the message definitions.
+/// \param output_directory if not null NULL, output files are written
+///     to the given directory. If NULL, they are written to the current
+///     working directory.
+void
+writeProgramFile(const string& file,
+                 const vector<string>& ns_components,
+                 MessageDictionary& dictionary,
+                 const char* output_directory) {
+    Filename message_file(file);
+    Filename program_file(Filename(message_file.name()).useAsDefault(".cc"));
+    if (output_directory) {
+        program_file.setDirectory(output_directory);
+    }
+
+    // zero out the errno to be safe
+    errno = 0;
+
+    // Open the output file for writing
+    ofstream ccfile(program_file.fullName().c_str());
+
+    if (ccfile.fail()) {
+        isc_throw_4(MessageException, "Error opening output file",
+                    LOG_OPEN_OUTPUT_FAIL, program_file.fullName(),
+                    strerror(errno), 0);
+    }
+
+    // Write the preamble.  If there is an error, we'll pick it up after
+    // the last write.
+
+    ccfile <<
+        "// File created from " << message_file.fullName() << "\n" <<
+         "\n" <<
+         "#include <cstddef>\n" <<
+         "#include <log/message_types.h>\n" <<
+         "#include <log/message_initializer.h>\n" <<
+         "\n";
+
+    // Declare the message symbols themselves.
+
+    writeOpeningNamespace(ccfile, ns_components);
+
+    vector<string> idents = sortedIdentifiers(dictionary);
+    for (vector<string>::const_iterator j = idents.begin();
+        j != idents.end(); ++j) {
+        ccfile << "extern const isc::log::MessageID " << *j <<
+            " = \"" << *j << "\";\n";
+    }
+    ccfile << "\n";
+
+    writeClosingNamespace(ccfile, ns_components);
+
+    // Now the code for the message initialization.
+
+    ccfile <<
+         "namespace {\n" <<
+         "\n" <<
+         "const char* values[] = {\n";
+
+    // Output the identifiers and the associated text.
+    idents = sortedIdentifiers(dictionary);
+    for (vector<string>::const_iterator i = idents.begin();
+        i != idents.end(); ++i) {
+            ccfile << "    \"" << *i << "\", \"" <<
+                quoteString(dictionary.getText(*i)) << "\",\n";
+    }
+
+    // ... and the postamble
+    ccfile <<
+        "    NULL\n" <<
+        "};\n" <<
+        "\n" <<
+        "const isc::log::MessageInitializer initializer(values);\n" <<
+        "\n" <<
+        "} // Anonymous namespace\n" <<
+        "\n";
+
+    // Report errors (if any) and exit
+    if (ccfile.fail()) {
+        isc_throw_4(MessageException, "Error writing to output file",
+                    LOG_WRITE_ERROR, program_file.fullName(), strerror(errno),
+                    0);
+    }
+
+    ccfile.close();
+}
+
+/// \brief Error and exit if there are duplicate entries
+///
+/// If the input file contained duplicate message IDs, we print an
+/// error for each of them, then exit the program with a non-0 value.
+///
+/// \param reader Message Reader used to read the file
+void
+errorDuplicates(MessageReader& reader) {
+
+    // Get the duplicates (the overflow) and, if present, sort them into some
+    // order and remove those which occur more than once (which mean that they
+    // occur more than twice in the input file).
+    MessageReader::MessageIDCollection duplicates = reader.getNotAdded();
+    if (!duplicates.empty()) {
+        cout << "Error: the following duplicate IDs were found:\n";
+
+        sort(duplicates.begin(), duplicates.end());
+        MessageReader::MessageIDCollection::iterator new_end =
+            unique(duplicates.begin(), duplicates.end());
+        for (MessageReader::MessageIDCollection::iterator i = duplicates.begin();
+            i != new_end; ++i) {
+            cout << "    " << *i << "\n";
+        }
+        exit(1);
+    }
+}
+
+/// \brief Main Program
+///
+/// Parses the options then dispatches to the appropriate function.  See the
+/// main file header for the invocation.
+int
+main(int argc, char* argv[]) {
+
+    const char* soptions = "hvpd:";               // Short options
+
+    optind = 1;             // Ensure we start a new scan
+    int  opt;               // Value of the option
+
+    const char *output_directory = NULL;
+
+    while ((opt = getopt(argc, argv, soptions)) != -1) {
+        switch (opt) {
+            case 'd':
+                output_directory = optarg;
+                break;
+
+            case 'h':
+                usage();
+                return (0);
+
+            case 'v':
+                version();
+                return (0);
+
+            default:
+                // A message will have already been output about the error.
+                return (1);
+        }
+    }
+
+    // Do we have the message file?
+    if (optind < (argc - 1)) {
+        cout << "Error: excess arguments in command line\n";
+        usage();
+        return (1);
+    } else if (optind >= argc) {
+        cout << "Error: missing message file\n";
+        usage();
+        return (1);
+    }
+    string message_file = argv[optind];
+
+    try {
+        // Have identified the file, so process it.  First create a local
+        // dictionary into which the data will be put.
+        MessageDictionary dictionary;
+
+        // Read the data into it.
+        MessageReader reader(&dictionary);
+        reader.readFile(message_file);
+
+        // Error (and quit) if there are of any duplicates encountered.
+        errorDuplicates(reader);
+
+        // Get the namespace into which the message definitions will be put and
+        // split it into components.
+        vector<string> ns_components =
+            splitNamespace(reader.getNamespace());
+
+        // Write the header file.
+        writeHeaderFile(message_file, ns_components, dictionary,
+                        output_directory);
+
+        // Write the file that defines the message symbols and text
+        writeProgramFile(message_file, ns_components, dictionary,
+                         output_directory);
+
+    } catch (const MessageException& e) {
+        // Create an error message from the ID and the text
+        const MessageDictionaryPtr& global = MessageDictionary::globalDictionary();
+        string text = e.id();
+        text += ", ";
+        text += global->getText(e.id());
+        // Format with arguments
+        vector<string> args(e.arguments());
+        for (size_t i(0); i < args.size(); ++ i) {
+            try {
+                replacePlaceholder(text, args[i], i + 1);
+            } catch (...) {
+                // Error in error handling: nothing right to do...
+            }
+        }
+
+        cerr << text << "\n";
+
+        return (1);
+    } catch (const std::exception& ex) {
+        cerr << "Fatal error: " << ex.what() << "\n";
+
+        return (1);
+    } catch (...) {
+        cerr << "Fatal error\n";
+
+        return (1);
+    }
+
+    return (0);
+}