Update prime_divs.c (commented for better readability)

prime_divs.c

@@ -11,50 +11,39 @@
 #include <string.h>
 #include "fileFeatures.h"
 
-
-// int max value: 2 147 483 647
-// long max value: 9223372 036 854 775 807
-
-
-// char *filepath = "/home/jtwite/Desktop/test";
-
-// Remplacez-le contenu par le chemin relatif du fichier que vous souhaitez tester.
-
-
-
 int main(int argc, char *argv[])
 {
     struct timeval stop, start;
     gettimeofday(&start, NULL);
 
-    printf("argv[1]: %s\n", argv[1]);
-    printf("argv[2]: %s\n", argv[2]);
+    printf("argv[1]: %s\n", argv[1]); // argv[1] = input file path
+    printf("argv[2]: %s\n", argv[2]); // argv[2] = output file path
 
-    //open the file
+    //open the fileInput
     int fileInput = open(argv[1], O_RDONLY);
     if (fileInput <= 0)
         exit(1);
 
-    // get the fileInput size
+    // get the fileInput size, map it in the virtual &dress space and close fileInput directory
     struct stat sb;
     fstat(fileInput, &sb);
     char *file_in_memory = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fileInput, 0);
     close(fileInput);
-    // Create a new file struct in which the output is writen
-    FILE *fileOutput = fopen(argv[2], "w");
+    
+    FILE *fileOutput = fopen(argv[2], "w"); // Create the file output
     if(fileOutput == NULL)
         exit(-2);
-    //go through the mapped file to get numbers and write them in fileOutput
-
+    
+    //go through the mapped file, read numbers and write them in fileOutput
     factorize(file_in_memory, fileOutput);
 
-    //close everything
+    // unmap fileInput and close fileOutput
     munmap(file_in_memory, sb.st_size);
-
     fclose(fileOutput);
 
+    // print out the computation performance
     gettimeofday(&stop, NULL);
-    printf("took %lu µs\n", (stop.tv_sec - start.tv_sec) * 1000000 + stop.tv_usec - start.tv_usec);
+    printf("%s factorized into %s.\ntook %lu µs\n", argv[1], argv[2], (stop.tv_sec - start.tv_sec) * 1000000 + stop.tv_usec - start.tv_usec);
 
     return 0;
 }