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authorBen Longbons <b.r.longbons@gmail.com>2014-01-25 09:43:09 -0800
committerBen Longbons <b.r.longbons@gmail.com>2014-01-25 10:14:44 -0800
commit34f0540da418b01dd4d49f6ecf72569d3cfecfdf (patch)
treebf7c4623b0d794e4db8c72b0906bb40807d62ba8 /src/common/config_parse.cpp
parent9a4c3a44476f3306a8deed8a836e8fbc25ceb55f (diff)
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Implement unified config parsing (mostly)
Diffstat (limited to 'src/common/config_parse.cpp')
-rw-r--r--src/common/config_parse.cpp154
1 files changed, 154 insertions, 0 deletions
diff --git a/src/common/config_parse.cpp b/src/common/config_parse.cpp
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+++ b/src/common/config_parse.cpp
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+#include "config_parse.hpp"
+// config_parse.hpp - Framework for per-server config parsers.
+//
+// Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com>
+//
+// This file is part of The Mana World (Athena server)
+//
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+
+#include "../strings/xstring.hpp"
+#include "../strings/zstring.hpp"
+
+#include "../io/cxxstdio.hpp"
+#include "../io/line.hpp"
+
+#include "version.hpp"
+
+#include "../poison.hpp"
+
+bool is_comment(XString line)
+{
+ return not line or line.startswith("//");
+}
+
+template<class ZS>
+inline
+bool config_split_impl(ZS line, XString *key, ZS *value)
+{
+ // unconditionally fail if line contains control characters
+ if (std::find_if(line.begin(), line.end(),
+ [](unsigned char c) { return c < ' '; }
+ ) != line.end())
+ return false;
+ // try to find a colon, fail if not found
+ typename ZS::iterator colon = std::find(line.begin(), line.end(), ':');
+ if (colon == line.end())
+ return false;
+
+ *key = line.xislice_h(colon).strip();
+ // move past the colon and any spaces
+ ++colon;
+ *value = line.xislice_t(colon).lstrip();
+ return true;
+}
+
+// eventually this should go away
+bool config_split(ZString line, XString *key, ZString *value)
+{
+ return config_split_impl(line, key, value);
+}
+// and use this instead
+bool config_split(XString line, XString *key, XString *value)
+{
+ return config_split_impl(line, key, value);
+}
+
+/// Master config parser. This handles 'import' and 'version-ge' etc.
+/// Then it defers to the inferior parser for a line it does not understand.
+bool load_config_file(ZString filename, ConfigItemParser slave)
+{
+ io::LineReader in(filename);
+ if (!in.is_open())
+ {
+ PRINTF("Unable to open file: %s\n", filename);
+ return false;
+ }
+ io::Line line;
+ bool rv = true;
+ while (in.read_line(line))
+ {
+ if (is_comment(line.text))
+ continue;
+ XString key;
+ ZString value;
+ if (!config_split(line.text, &key, &value))
+ {
+ line.error("Bad config line");
+ rv = false;
+ continue;
+ }
+ if (key == "import")
+ {
+ rv &= load_config_file(value, slave);
+ continue;
+ }
+ else if (key == "version-lt")
+ {
+ Version vers;
+ if (!extract(value, &vers))
+ {
+ rv = false;
+ continue;
+ }
+ if (CURRENT_VERSION < vers)
+ continue;
+ break;
+ }
+ else if (key == "version-le")
+ {
+ Version vers;
+ if (!extract(value, &vers))
+ {
+ rv = false;
+ continue;
+ }
+ if (CURRENT_VERSION <= vers)
+ continue;
+ break;
+ }
+ else if (key == "version-gt")
+ {
+ Version vers;
+ if (!extract(value, &vers))
+ {
+ rv = false;
+ continue;
+ }
+ if (CURRENT_VERSION > vers)
+ continue;
+ break;
+ }
+ else if (key == "version-ge")
+ {
+ Version vers;
+ if (!extract(value, &vers))
+ {
+ rv = false;
+ continue;
+ }
+ if (CURRENT_VERSION >= vers)
+ continue;
+ break;
+ }
+ else if (!slave(key, value))
+ {
+ line.error("Bad config key or value");
+ rv = false;
+ continue;
+ }
+ // nothing to see here, move along
+ }
+ return rv;
+}