blob: bffb61f5db196163bb0a339583fbdeef3bdf0565 [file] [log] [blame]
// 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.
#include "bin/options.h"
namespace dart {
namespace bin {
OptionProcessor* OptionProcessor::first_ = nullptr;
bool OptionProcessor::IsValidFlag(const char* name) {
return name[0] == '-' && name[1] == '-' && name[2] != '\0';
}
bool OptionProcessor::IsValidShortFlag(const char* name) {
return name[0] == '-' && name[1] != '\0';
}
const char* OptionProcessor::ProcessOption(const char* option,
const char* name) {
const intptr_t length = strlen(name);
for (intptr_t i = 0; i < length; i++) {
if (option[i] != name[i]) {
if ((name[i] == '_') && (option[i] == '-')) {
continue;
}
return nullptr;
}
}
return option + length;
}
bool OptionProcessor::TryProcess(const char* option,
CommandLineOptions* vm_options) {
for (OptionProcessor* p = first_; p != nullptr; p = p->next_) {
if (p->Process(option, vm_options)) {
return true;
}
}
return false;
}
static bool IsPrefix(const char* prefix, size_t prefix_len, const char* str) {
ASSERT(prefix != nullptr);
ASSERT(str != nullptr);
const size_t str_len = strlen(str);
if (str_len < prefix_len) {
return false;
}
return strncmp(prefix, str, prefix_len) == 0;
}
bool OptionProcessor::ProcessEnvironmentOption(
const char* arg,
CommandLineOptions* vm_options,
dart::SimpleHashMap** environment) {
ASSERT(arg != nullptr);
ASSERT(environment != nullptr);
const char* kShortPrefix = "-D";
const char* kLongPrefix = "--define=";
const int kShortPrefixLen = strlen(kShortPrefix);
const int kLongPrefixLen = strlen(kLongPrefix);
const bool is_short_form = IsPrefix(kShortPrefix, kShortPrefixLen, arg);
const bool is_long_form = IsPrefix(kLongPrefix, kLongPrefixLen, arg);
if (is_short_form) {
arg = arg + kShortPrefixLen;
} else if (is_long_form) {
arg = arg + kLongPrefixLen;
} else {
return false;
}
if (*arg == '\0') {
return true;
}
if (*environment == nullptr) {
*environment = new SimpleHashMap(&SimpleHashMap::SameStringValue, 4);
}
// Split the name=value part of the -Dname=value argument.
char* name;
char* value = nullptr;
const char* equals_pos = strchr(arg, '=');
if (equals_pos == nullptr) {
// No equal sign (name without value) currently not supported.
if (is_short_form) {
Syslog::PrintErr("No value given to -D option\n");
} else {
Syslog::PrintErr("No value given to --define option\n");
}
return true;
}
int name_len = equals_pos - arg;
if (name_len == 0) {
if (is_short_form) {
Syslog::PrintErr("No name given to -D option\n");
} else {
Syslog::PrintErr("No name given to --define option\n");
}
return true;
}
// Split name=value into name and value.
name = reinterpret_cast<char*>(malloc(name_len + 1));
strncpy(name, arg, name_len);
name[name_len] = '\0';
value = Utils::StrDup(equals_pos + 1);
SimpleHashMap::Entry* entry =
(*environment)
->Lookup(GetHashmapKeyFromString(name),
SimpleHashMap::StringHash(name), true);
ASSERT(entry != nullptr); // Lookup adds an entry if key not found.
if (entry->value != nullptr) {
free(name);
free(entry->value);
}
entry->value = value;
return true;
}
} // namespace bin
} // namespace dart