用数字比较替换字符串比较

main.cpp

@@ -2,6 +2,7 @@
 #include <boost/filesystem.hpp>
 #include <vector>
 #include <string>
+#include <algorithm>
 
 #define   K_VISION_DIR   "/hard/k_vision"
 #define   AI_VISION_DIR  "/hard/ai_vision"
@@ -92,7 +93,7 @@ std::vector<std::string> get_search_paths(const std::string& strFileName, int nB
     return vs;
 }
 
-std::vector<std::string> cvt_filename_to_datetime(const std::string& strFileName, int nBeginTime, int nEndTime)
+std::vector<long long> get_file_timestamp_range(const std::string& strFileName, int nBeginTime, int nEndTime)
 {
     std::vector<std::string> vs;
     if (strFileName.empty() || nBeginTime > nEndTime)
@@ -115,18 +116,18 @@ std::vector<std::string> cvt_filename_to_datetime(const std::string& strFileName
     tt[2] = tt[0] + nEndTime;
     tm* tm_begin = localtime(&tt[1]);
     char szBegin[255];
-    snprintf(szBegin, sizeof(szBegin),"%d%02d%02d_%02d%02d%02d",
+    snprintf(szBegin, sizeof(szBegin),"%d%02d%02d%02d%02d%02d",
              tm_begin->tm_year + 1900, tm_begin->tm_mon + 1, tm_begin->tm_mday, tm_begin->tm_hour, tm_begin->tm_min, tm_begin->tm_sec);
     tm* tm_end = localtime(&tt[2]);
     char szEnd[255];
-    snprintf(szEnd, sizeof(szEnd),"%d%02d%02d_%02d%02d%02d",
+    snprintf(szEnd, sizeof(szEnd),"%d%02d%02d%02d%02d%02d",
              tm_end->tm_year + 1900, tm_end->tm_mon + 1, tm_end->tm_mday, tm_end->tm_hour, tm_end->tm_min, tm_end->tm_sec);
-    vs.push_back(szBegin);
+    vs.push_back(std::atoll(szBegin));
-    vs.push_back(szEnd);
+    vs.push_back(std::atoll(szEnd));
     return vs;
 }
 
-std::string get_file_timestamp_str(const std::string& strPath)
+long long get_file_timestamp(const std::string& strPath)
 {
     std::string str;
     if (strPath.empty())
@@ -135,7 +136,8 @@ std::string get_file_timestamp_str(const std::string& strPath)
     }    
     str = path.filename().string();
     auto strTime = str.substr(0, 15);
-    return strTime;
+    std::remove(strTime.begin(), strTime.end(), '_');
+    return std::atoll(strTime.c_str());
 }
 
 int main(int argc, char* argv[]) {
@@ -171,7 +173,7 @@ int main(int argc, char* argv[]) {
     for (auto it:vec_file_name)
     {
         ++j;
-        auto vec_datetime = cvt_filename_to_datetime(it, nParam[0], nParam[1]);
+        auto vec_datetime = get_file_timestamp_range(it, nParam[0], nParam[1]);
         if (vec_datetime.empty())
         {
             continue;
@@ -182,8 +184,8 @@ int main(int argc, char* argv[]) {
             auto vec_file_path = get_file_paths(dir);
             for (auto path:vec_file_path)
             {
-                auto strTime = get_file_timestamp_str(path);
+                auto timestamp = get_file_timestamp(path);
-                if (strTime >= vec_datetime.front() && strTime <= vec_datetime.back())
+                if (timestamp >= vec_datetime.front() && timestamp <= vec_datetime.back())
                 {
                     vec_matched_path.push_back(path);
                 }