2 files changed, 156 insertions, 0 deletions
diff --git a/src/util/common.cc b/src/util/common.cc
new file mode 100644
index 0000000..7a6275d
--- /dev/null
+++ b/src/util/common.cc
@@ -0,0 +1,123 @@
+#include "util/common.h"
+
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <map>
+#include <cstdio>
+
+std::string gen_random()
+{
+    std::string::size_type length = 20;
+    static auto& chrs = "0123456789"
+        "abcdefghijklmnopqrstuvwxyz"
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+    thread_local static std::mt19937 rg{std::random_device{}()};
+    thread_local static std::uniform_int_distribution<std::string::size_type> pick(0, sizeof(chrs) - 2);
+
+    std::string s;
+
+    s.reserve(length);
+
+    while(length--)
+        s += chrs[pick(rg)];
+
+    return s;
+}
+
+void hexchar(unsigned char c, unsigned char &hex1, unsigned char &hex2)
+{
+    hex1 = c / 16;
+    hex2 = c % 16;
+    hex1 += hex1 <= 9 ? '0' : 'a' - 10;
+    hex2 += hex2 <= 9 ? '0' : 'a' - 10;
+}
+
+std::string url_encode(const std::string &s) {
+    const char *str = s.c_str();
+    std::vector<char> v(s.size());
+    v.clear();
+    for (size_t i = 0, l = s.size(); i < l; i++)
+    {
+        char c = str[i];
+        if ((c >= '0' && c <= '9') ||
+            (c >= 'a' && c <= 'z') ||
+            (c >= 'A' && c <= 'Z') ||
+            c == '-' || c == '_' || c == '.' || c == '!' || c == '~' ||
+            c == '*' || c == '\'' || c == '(' || c == ')')
+        {
+            v.push_back(c);
+        }
+        else
+        {
+            v.push_back('%');
+            unsigned char d1, d2;
+            hexchar(c, d1, d2);
+            v.push_back(d1);
+            v.push_back(d2);
+        }
+    }
+    return std::string(v.cbegin(), v.cend());
+}
+
+std::string url_decode(const std::string &SRC) {
+    std::string ret;
+    char ch;
+    int ii;
+    for (size_t i = 0; i < SRC.length(); i++) {
+        if (int(SRC[i])==37) {
+            std::sscanf(SRC.substr(i+1,2).c_str(), "%x", &ii);
+            ch=static_cast<char>(ii);
+            ret+=ch;
+            i=i+2;
+        } else {
+            ret+=SRC[i];
+        }
+    }
+    return (ret);
+}
+
+std::string html_encode(const std::string& data) {
+    std::string buffer;
+    buffer.reserve(data.size());
+    for(size_t pos = 0; pos != data.size(); ++pos) {
+        switch(data[pos]) {
+            case '&':  buffer.append("&amp;");       break;
+            case '\"': buffer.append("&quot;");      break;
+            case '\'': buffer.append("&apos;");      break;
+            case '<':  buffer.append("&lt;");        break;
+            case '>':  buffer.append("&gt;");        break;
+            default:   buffer.append(&data[pos], 1); break;
+        }
+    }
+    return buffer;
+}
+
+static std::map<std::string, std::string> text_resource;
+static std::string empty{};
+
+void load_text_resource(std::string filename, std::string key) {
+    std::ifstream t(filename);
+    std::stringstream buffer;
+    buffer << t.rdbuf();
+    text_resource[key] = buffer.str();
+}
+
+const std::string &get_text_resource(std::string key) {
+    if (text_resource.find(key) == text_resource.end()) {
+        return empty;
+    }
+    return text_resource[key];
+}
+
+void str_replace(std::string& str, const std::string& from, const std::string& to) {
+    while (true) {
+        size_t start_pos = str.find(from);
+        if(start_pos == std::string::npos) {
+            return;
+        }
+        str.replace(start_pos, from.length(), to);
+    }
+}
diff --git a/src/util/common.h b/src/util/common.h
new file mode 100644
index 0000000..4ec4c4a
--- /dev/null
+++ b/src/util/common.h
@@ -0,0 +1,33 @@
+#ifndef HIVE_MIND_UTIL_COMMON_H_
+#define HIVE_MIND_UTIL_COMMON_H_
+
+#include <exception>
+#include <memory>
+#include <variant>
+#include <vector>
+#include <random>
+#include <string>
+#include <mutex>
+
+template<typename T>
+using Arc = std::shared_ptr<T>;
+
+template<typename T>
+using Box = std::unique_ptr<T>;
+
+using ulock = std::unique_lock<std::mutex>;
+using std::make_shared;
+using std::make_unique;
+
+struct Void{};
+
+std::string gen_random();
+std::string url_encode(const std::string &s);
+std::string url_decode(const std::string &s);
+std::string html_encode(const std::string& data);
+
+void load_text_resource(std::string filename, std::string key);
+const std::string &get_text_resource(std::string key);
+void str_replace(std::string& str, const std::string& from, const std::string& to);
+
+#endif