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#include <iostream>
#include <string>
#include <marisa.h>
#include "cmdopt.h"
namespace {
bool mmap_flag = true;
void print_help(const char *cmd) {
std::cerr << "Usage: " << cmd << " [OPTION]... DIC\n\n"
"Options:\n"
" -m, --mmap-dictionary use memory-mapped I/O to load a dictionary"
" (default)\n"
" -r, --read-dictionary read an entire dictionary into memory\n"
" -h, --help print this help\n"
<< std::endl;
}
int reverse_lookup(const char * const *args, std::size_t num_args) {
if (num_args == 0) {
std::cerr << "error: dictionary is not specified" << std::endl;
return 10;
} else if (num_args > 1) {
std::cerr << "error: more than one dictionaries are specified"
<< std::endl;
return 11;
}
marisa::Trie trie;
if (mmap_flag) {
try {
trie.mmap(args[0]);
} catch (const marisa::Exception &ex) {
std::cerr << ex.what() << ": failed to mmap a dictionary file: "
<< args[0] << std::endl;
return 20;
}
} else {
try {
trie.load(args[0]);
} catch (const marisa::Exception &ex) {
std::cerr << ex.what() << ": failed to load a dictionary file: "
<< args[0] << std::endl;
return 21;
}
}
marisa::Agent agent;
std::size_t key_id;
while (std::cin >> key_id) {
try {
agent.set_query(key_id);
trie.reverse_lookup(agent);
std::cout << agent.key().id() << '\t';
std::cout.write(agent.key().ptr(),
static_cast<std::streamsize>(agent.key().length())) << '\n';
} catch (const marisa::Exception &ex) {
std::cerr << ex.what() << ": reverse_lookup() failed: "
<< key_id << std::endl;
return 30;
}
if (!std::cout) {
std::cerr << "error: failed to write results to standard output"
<< std::endl;
return 30;
}
}
return 0;
}
} // namespace
int main(int argc, char *argv[]) {
std::ios::sync_with_stdio(false);
::cmdopt_option long_options[] = {
{ "mmap-dictionary", 0, NULL, 'm' },
{ "read-dictionary", 0, NULL, 'r' },
{ "help", 0, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
::cmdopt_t cmdopt;
::cmdopt_init(&cmdopt, argc, argv, "mrh", long_options);
int label;
while ((label = ::cmdopt_get(&cmdopt)) != -1) {
switch (label) {
case 'm': {
mmap_flag = true;
break;
}
case 'r': {
mmap_flag = false;
break;
}
case 'h': {
print_help(argv[0]);
return 0;
}
default: {
return 1;
}
}
}
return reverse_lookup(cmdopt.argv + cmdopt.optind,
static_cast<std::size_t>(cmdopt.argc - cmdopt.optind));
}
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