add history load/save

2 files changed, 71 insertions, 0 deletions

diff --git a/src/history.cc b/src/history.cc
index 3e976ce..4b3eba1 100644
--- a/src/history.cc
+++ b/src/history.cc
@@ -1,5 +1,15 @@
 #include "history.h"
 
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <print>
+#include <cstdio>
+#include <unistd.h>
+#include <fstream>
+#include <iostream>
+
+#include "util/io.h"
+
 using namespace std;
 
 namespace ov4
@@ -19,5 +29,54 @@ size_t get_last_index()
 {
     return history_vec.size() - 1;
 }
+
+string get_default_history_path()
+{
+    return get_home_dir() + '/' + ".ccshell_history";
+}
+
+void load_history(const string &path)
+{
+    history_vec.clear();
+    ifstream ifs(path);
+    if (!ifs.is_open())
+    {
+        loggerln("load_history: fail to open history");
+        return;
+    }
+    string tmp;
+    while (getline(ifs, tmp))
+    {
+        history_vec.push_back(tmp);
+    }
+    return;
+}
+
+void save_history(const string &path)
+{
+    int fd = open(path.c_str(), O_WRONLY | O_CREAT);
+    if (fd == -1) 
+    {
+        loggerln("save_history: fail to open() history");
+        return;
+    }
+    char f_mode = 'w';
+    FILE *f = fdopen(fd, &f_mode);
+    if (f == nullptr)
+    {
+        loggerln("save_history: fail to fdopen() history");
+        close(fd);
+        return;
+    }
+
+    for (auto &c : history_vec)
+    {
+        println(f, "{}", c);
+    }
+
+    fflush(f);
+    fsync(fd);
+    fclose(f);
+}
     
 }
diff --git a/src/path.cc b/src/path.cc
index 103e2c5..30e81cc 100644
--- a/src/path.cc
+++ b/src/path.cc
@@ -1,5 +1,12 @@
 #include "path.h"
 
+#include <pwd.h>
+#include <unistd.h>
+
+#include "global.h"
+#include "util/string.h"
+#include "util/io.h"
+
 namespace ov4
 {
 
@@ -67,5 +74,10 @@ string get_current_dir()
     return safe_str(getcwd(buf, MAXLINE));
 }
 
+string get_home_dir()
+{
+    return getpwuid(getuid())->pw_dir;
+}
+
 
 }