slight code cleanup

CMakeLists.txt

@@ -2,5 +2,12 @@ cmake_minimum_required(VERSION 3.0)
 project(DumbSThreeMHeaderEditor)
 
 set(CMAKE_C_STANDARD 90)
+set(CMAKE_C_EXTENSIONS OFF)
 
-add_executable(DumbSThreeMHeaderEditor main.c)
+add_executable(DumbSThreeMHeaderEditor main.c)
+# https://stackoverflow.com/a/50882216
+if(MSVC)
+  target_compile_options(DumbSThreeMHeaderEditor PRIVATE /W4 /WX)
+else()
+  target_compile_options(DumbSThreeMHeaderEditor PRIVATE -Wall -Wextra -Wpedantic -Werror -march=native)
+endif()

main.c

@@ -12,7 +12,7 @@
 int
 main(int argc, char* argv[]) {
 
-    char* header;
+    unsigned char header[96] = {0};
     unsigned char flaggos, stereotoggle, i = 0;
     unsigned short trackerinfo = 0;
 
@@ -25,12 +25,6 @@ main(int argc, char* argv[]) {
             return 1;
         }
 
-        header = (char*)calloc(96, sizeof(char));
-        if (header == NULL) {
-            puts("Failed to allocate memory!");
-            return 2;
-        }
-
         fread(header, sizeof(char), 96, s3m);
 
         if (header[44] != 'S' || header[45] != 'C' || header[46] != 'R' || header[47] != 'M') {
@@ -120,11 +114,9 @@ main(int argc, char* argv[]) {
             scanf("%hhu", &header[64 + i]);
         }
 
-        fseek(s3m, 0, SEEK_SET);
+        rewind(s3m);
         fwrite(header, sizeof(char), 96, s3m);
 
-        free(header);
-
         fclose(s3m);
 
         puts("Done!");