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#include <cstdlib>
#include <iostream>
#include <string>
#include <marisa.h>
#include "cmdopt.h"
namespace {
std::size_t max_num_results = 10;
bool mmap_flag = true;
void print_help(const char *cmd) {
std::cerr << "Usage: " << cmd << " [OPTION]... DIC\n\n"
"Options:\n"
" -n, --max-num-results=[N] limit the number of results to N"
" (default: 10)\n"
" 0: no limit\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 common_prefix_search(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;
marisa::Keyset keyset;
std::string str;
while (std::getline(std::cin, str)) {
try {
agent.set_query(str.c_str(), str.length());
while (trie.common_prefix_search(agent)) {
keyset.push_back(agent.key());
}
if (keyset.empty()) {
std::cout << "not found" << std::endl;
} else {
std::cout << keyset.size() << " found" << std::endl;
const std::size_t end = std::min(max_num_results, keyset.size());
for (std::size_t i = 0; i < end; ++i) {
std::cout << keyset[i].id() << '\t';
std::cout.write(keyset[i].ptr(),
static_cast<std::streamsize>(keyset[i].length())) << '\t';
std::cout << str << '\n';
}
}
keyset.reset();
} catch (const marisa::Exception &ex) {
std::cerr << ex.what() << ": common_prefix_search() failed: "
<< str << std::endl;
return 30;
}
if (!std::cout) {
std::cerr << "error: failed to write results to standard output"
<< std::endl;
return 31;
}
}
return 0;
}
} // namespace
int main(int argc, char *argv[]) {
std::ios::sync_with_stdio(false);
::cmdopt_option long_options[] = {
{ "max-num-results", 1, NULL, 'n' },
{ "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, "n:mrh", long_options);
int label;
while ((label = ::cmdopt_get(&cmdopt)) != -1) {
switch (label) {
case 'n': {
char *end_of_value;
const long value = std::strtol(cmdopt.optarg, &end_of_value, 10);
if ((*end_of_value != '\0') || (value < 0)) {
std::cerr << "error: option `-n' with an invalid argument: "
<< cmdopt.optarg << std::endl;
}
if ((value == 0) || ((unsigned long long)value > MARISA_SIZE_MAX)) {
max_num_results = MARISA_SIZE_MAX;
} else {
max_num_results = (std::size_t)value;
}
break;
}
case 'm': {
mmap_flag = true;
break;
}
case 'r': {
mmap_flag = false;
break;
}
case 'h': {
print_help(argv[0]);
return 0;
}
default: {
return 1;
}
}
}
return common_prefix_search(cmdopt.argv + cmdopt.optind,
static_cast<std::size_t>(cmdopt.argc - cmdopt.optind));
}
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