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// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_BIN_OPTIONS_H_
#define RUNTIME_BIN_OPTIONS_H_
#include "bin/dartutils.h"
#include "platform/globals.h"
#include "platform/hashmap.h"
#include "platform/syslog.h"
namespace dart {
namespace bin {
typedef bool (*OptionProcessorCallback)(const char* arg,
CommandLineOptions* vm_options);
class OptionProcessor {
public:
OptionProcessor() : next_(first_) { first_ = this; }
virtual ~OptionProcessor() {}
// Returns true if name starts with "--".
static bool IsValidFlag(const char* name);
// Returns true if name starts with "-".
static bool IsValidShortFlag(const char* name);
virtual bool Process(const char* option, CommandLineOptions* options) = 0;
static bool TryProcess(const char* option, CommandLineOptions* options);
static const char* ProcessOption(const char* option, const char* name);
static bool ProcessEnvironmentOption(const char* arg,
CommandLineOptions* vm_options,
dart::SimpleHashMap** environment);
private:
static OptionProcessor* first_;
OptionProcessor* next_;
DISALLOW_ALLOCATION();
DISALLOW_COPY_AND_ASSIGN(OptionProcessor);
};
class CallbackOptionProcessor : public OptionProcessor {
public:
explicit CallbackOptionProcessor(OptionProcessorCallback cb) : cb_(cb) {}
virtual bool Process(const char* option, CommandLineOptions* vm_options) {
return cb_(option, vm_options);
}
private:
OptionProcessorCallback cb_;
};
#define DEFINE_CB_OPTION(callback) \
static CallbackOptionProcessor option_##callback(&callback);
#define DEFINE_STRING_OPTION_CB(name, callback) \
class OptionProcessor_##name : public OptionProcessor { \
public: \
virtual bool Process(const char* option, CommandLineOptions* vm_options) { \
const char* value = \
OptionProcessor::ProcessOption(option, "--" #name "="); \
if (value == nullptr) { \
return false; \
} \
if (*value == '\0') { \
Syslog::PrintErr("Empty value for option " #name "\n"); \
return false; \
} \
callback; \
return true; \
} \
}; \
static OptionProcessor_##name option_##name;
#define DEFINE_STRING_OPTION(name, variable) \
DEFINE_STRING_OPTION_CB(name, { variable = value; })
#define DEFINE_ENUM_OPTION(name, enum_name, variable) \
DEFINE_STRING_OPTION_CB(name, { \
const char* const* kNames = k##enum_name##Names; \
for (intptr_t i = 0; kNames[i] != nullptr; i++) { \
if (strcmp(value, kNames[i]) == 0) { \
variable = static_cast<enum_name>(i); \
return true; \
} \
} \
Syslog::PrintErr( \
"Unrecognized value for " #name ": '%s'\nValid values are: ", value); \
for (intptr_t i = 0; kNames[i] != nullptr; i++) { \
Syslog::PrintErr("%s%s", i > 0 ? ", " : "", kNames[i]); \
} \
Syslog::PrintErr("\n"); \
})
#define DEFINE_BOOL_OPTION_CB(name, callback) \
class OptionProcessor_##name : public OptionProcessor { \
public: \
virtual bool Process(const char* option, CommandLineOptions* vm_options) { \
const char* value = OptionProcessor::ProcessOption(option, "--" #name); \
if (value == nullptr) { \
return false; \
} \
if (*value == '=') { \
Syslog::PrintErr("Non-empty value for option " #name "\n"); \
return false; \
} \
if (*value != '\0') { \
return false; \
} \
callback(vm_options); \
return true; \
} \
}; \
static OptionProcessor_##name option_##name;
#define DEFINE_BOOL_OPTION(name, variable) \
class OptionProcessor_##name : public OptionProcessor { \
public: \
virtual bool Process(const char* option, CommandLineOptions* vm_options) { \
const char* value = OptionProcessor::ProcessOption(option, "--" #name); \
if (value == nullptr) { \
return false; \
} \
if (*value == '=') { \
Syslog::PrintErr("Non-empty value for option " #name "\n"); \
return false; \
} \
if (*value != '\0') { \
return false; \
} \
variable = true; \
return true; \
} \
}; \
static OptionProcessor_##name option_##name;
#define DEFINE_BOOL_OPTION_SHORT(short_name, long_name, variable) \
class OptionProcessor_##long_name : public OptionProcessor { \
public: \
virtual bool Process(const char* option, CommandLineOptions* vm_options) { \
const char* value = \
OptionProcessor::ProcessOption(option, "-" #short_name); \
if (value == nullptr) { \
value = OptionProcessor::ProcessOption(option, "--" #long_name); \
} \
if (value == nullptr) { \
return false; \
} \
if (*value == '=') { \
Syslog::PrintErr("Non-empty value for option " #long_name "\n"); \
return false; \
} \
if (*value != '\0') { \
return false; \
} \
variable = true; \
return true; \
} \
}; \
static OptionProcessor_##long_name option_##long_name;
} // namespace bin
} // namespace dart
#endif // RUNTIME_BIN_OPTIONS_H_