add reading file

kpack_c.c

@@ -9,6 +9,11 @@
 
 static const char* str_usage = "Usage: %s [--nologo / -n] [--kernel / -k] [--unpack / -u] <infile> [<outfile>]\n";
 
+static void error_load_infile() {
+    printf("Error: cannot load input file\n");
+    exit(1);
+}
+
 int main(int argc, char *argv[])
 {
     bool flag_nologo = false;
@@ -75,8 +80,7 @@ int main(int argc, char *argv[])
     struct stat64 statbuf;
     int res_stat = stat64(infile_name, &statbuf);
     if (res_stat == -1) {
-        printf("Error: cannot load input file\n");
-        return 1;
+        error_load_infile();
     }
     // printf("statbuf.st_size = %lld\n", statbuf.st_size);
 
@@ -89,9 +93,23 @@ int main(int argc, char *argv[])
 
     FILE *infile_handle = fopen(infile_name, "rb");
     if (!infile_handle) {
-        printf("Error: cannot load input file\n");
+        error_load_infile();
+    }
+
+    unsigned char *infile_buf = malloc(infile_size);
+    if (infile_buf == NULL) {
+        printf("Error: memory allocation failed\n");
         return 1;
     }
+    size_t bytes_read = fread(infile_buf, 1, infile_size, infile_handle);
+    if (bytes_read != infile_size) {
+        error_load_infile();
+    }
+    fclose(infile_handle);
+
+    // printf("file contents = %s\n", infile_buf);
+
+    // TODO ...
 
     return 0;
 }