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Modernize db.hpp

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This commit is contained in:
topjohnwu 2021-08-27 01:06:03 -07:00
parent 4771c2810b
commit 5d162f81c4
2 changed files with 50 additions and 68 deletions
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47
native/jni/core/db.cpp
View File

@ -97,11 +97,12 @@ static bool dload_sqlite() {
return true;
}
int db_strings::getKeyIdx(string_view key) const {
int idx = DB_STRING_NUM;
for (int i = 0; i < DB_STRING_NUM; ++i) {
if (key == DB_STRING_KEYS[i])
idx = i;
int db_strings::get_idx(string_view key) const {
int idx = 0;
for (const char *k : DB_STRING_KEYS) {
if (key == k)
break;
++idx;
}
return idx;
}
@ -114,11 +115,12 @@ db_settings::db_settings() {
data[HIDE_CONFIG] = false;
}
int db_settings::getKeyIdx(string_view key) const {
int idx = DB_SETTINGS_NUM;
for (int i = 0; i < DB_SETTINGS_NUM; ++i) {
if (key == DB_SETTING_KEYS[i])
idx = i;
int db_settings::get_idx(string_view key) const {
int idx = 0;
for (const char *k : DB_SETTING_KEYS) {
if (key == k)
break;
++idx;
}
return idx;
}
@ -256,6 +258,14 @@ char *db_exec(const char *sql) {
return nullptr;
}
static int sqlite_db_row_callback(void *cb, int col_num, char **data, char **col_name) {
auto &func = *static_cast<const db_row_cb*>(cb);
db_row row;
for (int i = 0; i < col_num; ++i)
row[col_name[i]] = data[i];
return func(row) ? 0 : 1;
}
char *db_exec(const char *sql, const db_row_cb &fn) {
char *err;
if (mDB == nullptr) {
@ -268,13 +278,7 @@ char *db_exec(const char *sql, const db_row_cb &fn) {
);
}
if (mDB) {
sqlite3_exec(mDB, sql, [](void *cb, int col_num, char **data, char **col_name) -> int {
auto &func = *reinterpret_cast<const db_row_cb*>(cb);
db_row row;
for (int i = 0; i < col_num; ++i)
row[col_name[i]] = data[i];
return func(row) ? 0 : 1;
}, (void *) &fn, &err);
sqlite3_exec(mDB, sql, sqlite_db_row_callback, (void *) &fn, &err);
return err;
}
return nullptr;
@ -289,10 +293,10 @@ int get_db_settings(db_settings &cfg, int key) {
};
if (key >= 0) {
char query[128];
sprintf(query, "SELECT key, value FROM settings WHERE key='%s'", DB_SETTING_KEYS[key]);
snprintf(query, sizeof(query), "SELECT * FROM settings WHERE key='%s'", DB_SETTING_KEYS[key]);
err = db_exec(query, settings_cb);
} else {
err = db_exec("SELECT key, value FROM settings", settings_cb);
err = db_exec("SELECT * FROM settings", settings_cb);
}
db_err_cmd(err, return 1);
return 0;
@ -302,14 +306,15 @@ int get_db_strings(db_strings &str, int key) {
char *err;
auto string_cb = [&](db_row &row) -> bool {
str[row["key"]] = row["value"];
LOGD("magiskdb: query %s=[%s]\n", row["key"].data(), row["value"].data());
return true;
};
if (key >= 0) {
char query[128];
sprintf(query, "SELECT key, value FROM strings WHERE key='%s'", DB_STRING_KEYS[key]);
snprintf(query, sizeof(query), "SELECT * FROM strings WHERE key='%s'", DB_STRING_KEYS[key]);
err = db_exec(query, string_cb);
} else {
err = db_exec("SELECT key, value FROM strings", string_cb);
err = db_exec("SELECT * FROM strings", string_cb);
}
db_err_cmd(err, return 1);
return 0;

71
native/jni/include/db.hpp
View File

@ -6,15 +6,15 @@
#include <string_view>
#include <functional>
template <class T, size_t num>
class db_data_base {
template <class T, size_t N>
class db_dict {
public:
T& operator [](std::string_view key) {
return data[getKeyIdx(key)];
return data[get_idx(key)];
}
const T& operator [](std::string_view key) const {
return data[getKeyIdx(key)];
return data[get_idx(key)];
}
T& operator [](int key) {
@ -26,25 +26,22 @@ public:
}
protected:
T data[num + 1];
virtual int getKeyIdx(std::string_view key) const = 0;
T data[N + 1];
virtual int get_idx(std::string_view key) const = 0;
};
/***************
* DB Settings *
***************/
#define DB_SETTING_KEYS \
((const char *[]) { \
"root_access", \
"multiuser_mode", \
"mnt_ns", \
"magiskhide", \
})
constexpr const char *DB_SETTING_KEYS[] = {
"root_access",
"multiuser_mode",
"mnt_ns",
"magiskhide"
};
#define DB_SETTINGS_NUM 4
// Settings keys
// Settings key indices
enum {
ROOT_ACCESS = 0,
SU_MULTIUSER_MODE,
@ -74,33 +71,27 @@ enum {
NAMESPACE_MODE_ISOLATE
};
class db_settings : public db_data_base<int, DB_SETTINGS_NUM> {
class db_settings : public db_dict<int, std::size(DB_SETTING_KEYS)> {
public:
db_settings();
protected:
int getKeyIdx(std::string_view key) const override;
int get_idx(std::string_view key) const override;
};
/**************
* DB Strings *
**************/
#define DB_STRING_KEYS \
((const char *[]) { \
"requester", \
})
constexpr const char *DB_STRING_KEYS[] = { "requester" };
#define DB_STRING_NUM 1
// Strings keys
// Strings keys indices
enum {
SU_MANAGER = 0
};
class db_strings : public db_data_base<std::string, DB_STRING_NUM> {
class db_strings : public db_dict<std::string, std::size(DB_STRING_KEYS)> {
protected:
int getKeyIdx(std::string_view key) const override;
int get_idx(std::string_view key) const override;
};
/*************
@ -119,30 +110,16 @@ struct su_access {
int notify;
};
#define DEFAULT_SU_ACCESS (su_access) { \
.policy = QUERY, \
.log = 1, \
.notify = 1 \
}
#define SILENT_SU_ACCESS (su_access) { \
.policy = ALLOW, \
.log = 0, \
.notify = 0 \
}
#define NO_SU_ACCESS (su_access) { \
.policy = DENY, \
.log = 0, \
.notify = 0 \
}
#define DEFAULT_SU_ACCESS { QUERY, 1, 1 }
#define SILENT_SU_ACCESS { ALLOW, 0, 0 }
#define NO_SU_ACCESS { DENY, 0, 0 }
/********************
* Public Functions *
********************/
typedef std::map<std::string_view, std::string_view> db_row;
typedef std::function<bool(db_row&)> db_row_cb;
using db_row = std::map<std::string_view, std::string_view>;
using db_row_cb = std::function<bool(db_row&)>;
int get_db_settings(db_settings &cfg, int key = -1);
int get_db_strings(db_strings &str, int key = -1);