Offset sanity checks

demo/common.h

@@ -45,6 +45,7 @@ void write(const char *filename,
         fclose(out);
         if (written == 0) {
             perror("write error");
+            exit(4);
         }
     }
 }
@@ -61,6 +62,7 @@ void append(const char *filename, const char *t, unsigned size) {
         fclose(out);
         if (written == 0) {
             perror("write error");
+            exit(4);
         }
     }
 }

demo/extractmesh.c

@@ -57,8 +57,8 @@ void writemesh(const struct MeshHeader *mh,
 }
 
 void extractmeshes(const char *filedata,
-                   unsigned int filesize,
-                   const char *filename) {
+                   const char *filename,
+                   unsigned int filesize) {
     if (filedata == NULL || filesize <= 0) {
         return;
     }
@@ -83,7 +83,7 @@ int main(int argc, char ** argv) {
     char *f = argv[1];
     unsigned int bufsize = 0;
     char *buffer         = loadfile(f, &bufsize);
-    extractmeshes(buffer, bufsize, f);
+    extractmeshes(buffer, f, bufsize);
     free(buffer);
     return 0;
 }