sysrap/tests/dirent.cc

0001 // export OPTICKS_RANDOM_SEQPATH=/tmp/$USER/opticks/QSimTest/rng_sequence/rng_sequence_f_ni1000000_nj16_nk16_tranche100000
0002 // name=dirent ; gcc $name.cc -std=c++11 -lstdc++ -o /tmp/$name && /tmp/$name
0003
0004 #include <iostream>
0005 #include <sstream>
0006 #include <string>
0007 #include <vector>
0008 #include <cstdlib>
0009 #include <cstdio>
0010 #include "dirent.h"
0011
0012
0013 void ListDir(std::vector<std::string>& names, const char* path, const char* ext )
0014 {
0015     DIR* dir = opendir(path) ;
0016     if(!dir) return ;
0017     struct dirent* entry ;
0018     while ((entry = readdir(dir)) != nullptr)
0019     {
0020         const char* name = entry->d_name ;
0021         if(strlen(name) > strlen(ext) && strcmp(name + strlen(name) - strlen(ext), ext)==0)
0022         {
0023             //std::cout << name << std::endl;
0024             names.push_back(name);
0025         }
0026     }
0027     closedir (dir);
0028     std::sort( names.begin(), names.end() );
0029 }
0030
0031 std::string Desc(const std::vector<std::string>& names)
0032 {
0033     std::stringstream ss ;
0034     for(unsigned i=0 ; i < names.size() ; i++) ss << names[i] << std::endl ;
0035     std::string s = ss.str();
0036     return s ;
0037 }
0038
0039
0040
0041
0042 void test_0()
0043 {
0044     //const char* path = "c:\\src\\" ;
0045     const char* path = "/private/tmp" ;
0046
0047     DIR* dir = opendir(path) ;
0048     if( dir == NULL  )
0049     {
0050         perror ("");
0051         return ;
0052     }
0053
0054     struct dirent* ent;
0055     while ((ent = readdir(dir)) != NULL)
0056     {
0057         printf("%s\n", ent->d_name);
0058     }
0059
0060     closedir (dir);
0061 }
0062
0063 void test_1()
0064 {
0065     const char* path = getenv("OPTICKS_RANDOM_SEQPATH");
0066     const char* ext = ".npy";
0067     std::vector<std::string> names ;
0068     ListDir(names, path, ext);
0069     std::cout << Desc(names) << std::endl ;
0070
0071 }
0072
0073
0074
0075
0076 int main(int argc, char** argv)
0077 {
0078     //test_0();
0079     test_1();
0080
0081     return 0 ;
0082 }
0083