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utils.cc
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utils.cc
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/**
* Copyright 2019 The Gamma Authors.
*
* This source code is licensed under the Apache License, Version 2.0 license
* found in the LICENSE file in the root directory of this source tree.
*/
#include "utils.h"
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <algorithm>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include "util/log.h"
namespace utils {
long get_file_size(const char *path) {
long filesize = -1;
struct stat statbuff;
if (stat(path, &statbuff) < 0) {
return filesize;
} else {
filesize = statbuff.st_size;
}
return filesize;
}
long get_file_size(const std::string &path) {
return get_file_size(path.c_str());
}
std::vector<std::string> split(const std::string &p_str,
const std::string &p_separator) {
std::vector<std::string> ret;
std::size_t begin = p_str.find_first_not_of(p_separator);
while (std::string::npos != begin) {
std::size_t end = p_str.find_first_of(p_separator, begin);
if (std::string::npos == end) {
ret.emplace_back(p_str.substr(begin, p_str.size() - begin));
break;
} else {
ret.emplace_back(p_str.substr(begin, end - begin));
}
begin = p_str.find_first_not_of(p_separator, end);
}
return ret;
}
std::vector<std::string> split(const std::string &p_str,
const char *p_separator) {
const std::string p_separator_str = std::string(p_separator);
return split(p_str, p_separator_str);
}
int count_lines(const char *filename) {
std::ifstream read_file;
int n = 0;
std::string tmp;
read_file.open(filename, std::ios::in);
if (read_file.fail()) {
return 0;
} else {
while (getline(read_file, tmp, '\n')) {
n++;
}
read_file.close();
return n;
}
}
void GenRandom(std::mt19937 &rng, unsigned *addr, unsigned size, unsigned N) {
for (unsigned i = 0; i < size; ++i) {
if (size >= N) {
addr[i] = rng() % N;
} else {
addr[i] = rng() % (N - size);
}
}
std::sort(addr, addr + size);
for (unsigned i = 1; i < size; ++i) {
if (addr[i] <= addr[i - 1]) {
addr[i] = addr[i - 1] + 1;
}
}
unsigned off = rng() % N;
for (unsigned i = 0; i < size; ++i) {
addr[i] = (addr[i] + off) % N;
}
}
double elapsed() {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec + tv.tv_usec * 1e-6;
}
double getmillisecs() {
struct timeval tv;
gettimeofday(&tv, 0);
return tv.tv_sec * 1e3 + tv.tv_usec * 1e-3;
}
int isFolderExist(const char *path) {
DIR *dp;
if ((dp = opendir(path)) == NULL) {
return 0;
}
closedir(dp);
return -1;
}
bool file_exist(const std::string &path) {
if (access(path.c_str(), F_OK) != 0) {
return false; // not exist
}
return true;
}
int make_dir(const char *path) {
if (!utils::isFolderExist(path)) {
return mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
}
return 0;
}
int remove_dir(const char *path) {
DIR *d = opendir(path);
size_t path_len = strlen(path);
int r = -1;
if (d) {
struct dirent *p;
r = 0;
while (!r && (p = readdir(d))) {
int r2 = -1;
char *buf;
size_t len;
/* Skip the names "." and ".." as we don't want to recurse on them. */
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, "..")) {
continue;
}
len = path_len + strlen(p->d_name) + 2;
buf = static_cast<char *>(malloc(len));
if (buf) {
struct stat statbuf;
snprintf(buf, len, "%s/%s", path, p->d_name);
if (!stat(buf, &statbuf)) {
if (S_ISDIR(statbuf.st_mode)) {
r2 = remove_dir(buf);
} else {
r2 = unlink(buf);
}
}
free(buf);
}
r = r2;
}
closedir(d);
}
if (!r) {
r = rmdir(path);
}
return r;
}
int move_dir(const char *src, const char *dst, bool backup) {
std::string option = "";
if (backup) {
option += "--backup=t";
}
std::string cmd = std::string("/bin/mv ") + option + " " + src + " " + dst;
return system(cmd.c_str());
}
inline bool is_folder(const char *dir_name) {
auto dir = opendir(dir_name);
if (dir) {
closedir(dir);
return true;
}
return false;
}
inline bool is_folder(const std::string &dir_name) {
return is_folder(dir_name.data());
}
std::vector<std::string> for_each_file(const std::string &dir_name,
file_filter_type filter, bool sub) {
std::vector<std::string> v;
auto dir = opendir(dir_name.data());
struct dirent *ent;
if (dir) {
while ((ent = readdir(dir)) != NULL) {
auto p =
std::string(dir_name).append({file_sepator()}).append(ent->d_name);
if (sub) {
if (0 == strcmp(ent->d_name, "..") || 0 == strcmp(ent->d_name, ".")) {
continue;
} else if (is_folder(p)) {
auto r = for_each_file(p, filter, sub);
v.insert(v.end(), r.begin(), r.end());
continue;
}
}
if (sub || !is_folder(p))
if (filter(dir_name.data(), ent->d_name)) v.emplace_back(p);
}
closedir(dir);
}
return v;
}
std::vector<std::string> for_each_folder(const std::string &dir_name,
file_filter_type filter, bool sub) {
std::vector<std::string> v;
auto dir = opendir(dir_name.data());
struct dirent *ent;
if (dir) {
while ((ent = readdir(dir)) != NULL) {
auto p =
std::string(dir_name).append({file_sepator()}).append(ent->d_name);
if (sub) {
if (0 == strcmp(ent->d_name, "..") || 0 == strcmp(ent->d_name, ".")) {
continue;
} else if (is_folder(p)) {
auto r = for_each_folder(p, filter, sub);
v.insert(v.end(), r.begin(), r.end());
continue;
}
}
if (sub || is_folder(p))
if (filter(dir_name.data(), ent->d_name) &&
0 != strcmp(ent->d_name, "..") && 0 != strcmp(ent->d_name, "."))
v.emplace_back(ent->d_name);
}
closedir(dir);
}
return v;
}
file_filter_type default_ls_filter = [](const char *, const char *) {
return true;
};
std::vector<std::string> ls(const std::string &dir_name, bool sub) {
return for_each_file(dir_name, default_ls_filter, sub);
}
std::vector<std::string> ls_folder(const std::string &dir_name, bool sub) {
return for_each_folder(dir_name, default_ls_filter, sub);
}
ssize_t write_n(int fd, const char *buf, ssize_t n_bytes, int retry) {
ssize_t write_bytes = 0;
do {
ssize_t ret = write(fd, (void *)(buf + write_bytes), n_bytes - write_bytes);
if (ret < 0) {
return -1;
}
write_bytes += ret;
if (write_bytes >= n_bytes) {
return n_bytes;
}
} while (retry == -1 || retry-- > 0);
return write_bytes;
}
std::string join(const std::vector<std::string> &strs, char separator) {
std::stringstream ss;
ss << "[";
for (size_t i = 0; i < strs.size(); i++) {
if (i != 0) {
ss << separator;
}
ss << strs[i];
}
ss << "]";
return ss.str();
}
MEM_PACK *get_memoccupy() {
FILE *fd;
double mem_total, mem_used_rate;
char buff[256];
MEM_OCCUPY *m = (MEM_OCCUPY *)malloc(sizeof(MEM_OCCUPY));
MEM_PACK *p = (MEM_PACK *)malloc(sizeof(MEM_PACK));
fd = fopen("/proc/meminfo", "r");
fgets(buff, sizeof(buff), fd);
sscanf(buff, "%s %lu %s\n", m->name, &m->total, m->name2);
mem_total = m->total;
fgets(buff, sizeof(buff), fd);
fgets(buff, sizeof(buff), fd);
sscanf(buff, "%s %lu %s\n", m->name, &m->total, m->name2);
mem_used_rate = (1 - m->total / mem_total) * 100;
mem_total = mem_total / (1024 * 1024);
p->total = mem_total;
p->available = (double)m->total / (1024 * 1024);
p->used_rate = mem_used_rate;
fclose(fd);
free(m);
return p;
}
JsonParser::JsonParser() { content_ = cJSON_CreateObject(); }
JsonParser::~JsonParser() {
if (content_) {
cJSON_Delete(content_);
}
}
int JsonParser::Parse(const char *str) {
if (content_) {
cJSON_Delete(content_);
}
content_ = cJSON_Parse(str);
if (content_ == nullptr) {
return -1;
}
return 0;
}
int JsonParser::GetInt(const std::string &name, int &value) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr || !cJSON_IsNumber(jvalue)) return -1;
value = jvalue->valueint;
return 0;
}
int JsonParser::GetDouble(const std::string &name, double &value) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr || !cJSON_IsNumber(jvalue)) return -1;
value = jvalue->valuedouble;
return 0;
}
int JsonParser::GetString(const std::string &name, std::string &value) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr || !cJSON_IsString(jvalue)) return -1;
value.assign(jvalue->valuestring);
return 0;
}
int JsonParser::GetBool(const std::string &name, bool &value) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr || !cJSON_IsBool(jvalue)) return -1;
value = jvalue->type == cJSON_True;
return 0;
}
int JsonParser::GetObject(const std::string &name, JsonParser &value) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr || !cJSON_IsObject(jvalue)) return -1;
cJSON *dup = cJSON_Duplicate(jvalue, cJSON_True);
if (dup == NULL) return -1;
value.Reset(dup);
return 0;
}
bool JsonParser::Contains(const std::string &name) const {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr) return false;
return true;
}
int JsonParser::PutString(const std::string &name, const std::string &value) {
if (!cJSON_AddStringToObject(content_, name.c_str(), value.c_str())) {
return -1;
}
return 0;
}
int JsonParser::PutDouble(const std::string &name, double value) {
if (!cJSON_AddNumberToObject(content_, name.c_str(), value)) {
return -1;
}
return 0;
}
int JsonParser::PutInt(const std::string &name, int value) {
return PutDouble(name, static_cast<double>(value));
}
int JsonParser::PutObject(const std::string &name, JsonParser &&jp) {
int ret = PutObject(name, jp.content_);
if (ret) return ret;
jp.content_ = nullptr;
return 0;
}
int JsonParser::PutObject(const std::string &name, JsonParser &jp) {
cJSON *dup = cJSON_Duplicate(jp.content_, cJSON_True);
if (dup == NULL) return -1;
return PutObject(name, dup);
}
int JsonParser::PutObject(const std::string &name, cJSON *item) {
cJSON *jvalue = cJSON_GetObjectItemCaseSensitive(content_, name.c_str());
if (jvalue == nullptr) {
cJSON_AddItemToObject(content_, name.c_str(), item);
return 0;
}
if (cJSON_ReplaceItemViaPointer(content_, jvalue, item) == cJSON_False) {
return -1;
}
return 0;
}
void JsonParser::Reset(cJSON *content) {
if (content_) {
cJSON_Delete(content_);
}
content_ = content;
}
void CJsonMergeRight(cJSON *left, cJSON *right) {
cJSON *r_item = NULL;
cJSON_ArrayForEach(r_item, right) {
if (r_item->type == cJSON_Array || r_item->type == cJSON_Object) {
cJSON *l_item = cJSON_GetObjectItemCaseSensitive(left, r_item->string);
if (l_item) {
CJsonMergeRight(l_item, r_item);
} else {
cJSON_AddItemToObject(left, r_item->string, r_item);
}
} else {
cJSON_ReplaceItemInObject(left, r_item->string, r_item);
}
}
}
void JsonParser::MergeRight(JsonParser &other) {
CJsonMergeRight(content_, other.content_);
}
std::string JsonParser::ToStr(bool format) const {
std::string ret;
char *str = nullptr;
if (format) {
str = cJSON_Print(content_);
} else {
str = cJSON_PrintUnformatted(content_);
}
if (str) {
ret = str;
free(str);
}
return ret;
}
JsonParser &JsonParser::operator=(const JsonParser &other) {
cJSON *dup = cJSON_Duplicate(other.content_, cJSON_True);
if (dup == NULL) throw std::runtime_error("cjson duplicate error");
content_ = dup;
return *this;
}
FileIO::FileIO(std::string &file_path) : path(file_path), fp(nullptr) {}
FileIO::~FileIO() {
if (fp) {
fclose(fp);
fp = nullptr;
}
}
int FileIO::Open(const char *mode) {
fp = fopen(path.c_str(), mode);
if (fp == nullptr) {
return -1;
}
return 0;
}
size_t FileIO::Write(const void *data, size_t size, size_t m) {
return fwrite(data, size, m, fp);
}
size_t FileIO::Read(void *data, size_t size, size_t m) {
return fread(data, size, m, fp);
}
int64_t StringToInt64(const std::string &src) {
MD5_CTX ctx;
std::string md5_string;
unsigned char md[16] = {0};
MD5_Init(&ctx);
MD5_Update(&ctx, src.c_str(), src.size());
MD5_Final(md, &ctx);
int64_t a, b;
memcpy(&a, md, 8);
memcpy(&b, md + 8, 8);
return a ^ b;
}
} // namespace utils