School Commit Init

Anul 1/Semestrul 2/OS/Labs/c-test-practice/matrix-from-binary.c

@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+int main(int argc, char** argv) {
+    int fd, rows, cols, i, j;
+    int** m;
+
+    if(argc <= 1) {
+        fprintf(stderr, "No input file specified");
+        exit(1);
+    }
+
+    fd = open(argv[1], O_RDONLY);
+    if(fd == -1) {
+        perror("Failed to open input file");
+        exit(1);
+    }
+
+    if(read(fd, &rows, sizeof(int)) <= 0) {
+        perror("Could not read the number of rows");
+        exit(1);
+    }
+
+    if(read(fd, &cols, sizeof(int)) <= 0) {
+        perror("Could not read the number of columns");
+        exit(1);
+    }
+
+    m = (int**)malloc(sizeof(int*)*rows);
+    for(i=0; i<rows; i++) {
+        m[i] = (int*)malloc(sizeof(int)*cols);
+        read(fd, m[i], sizeof(int)*cols);
+        for(j=0; j<cols; j++) {
+            printf("%2d" , m[i][j]);
+        }
+        printf("\n");
+    }
+    for(i=0;i<rows;i++){
+    	free(m[i]);
+    }
+
+    free(m);
+
+    close(fd);
+    return 0;
+}