example2: rewrite without splitpath_s

Author: slipher

example2/example2.cpp

@@ -99,22 +99,6 @@ int main(int argc, char* argv[]) {
       return error("Invalid option: %s\n", argv[i]);
   }
 
-  // Split the source filename into its various components.
-#if defined(_WIN32)
-  char drive_buf[_MAX_DRIVE], dir_buf[_MAX_DIR], fname_buf[_MAX_FNAME], ext_buf[_MAX_EXT];
-  if (_splitpath_s(pSrc_filename, drive_buf, _MAX_DRIVE, dir_buf, _MAX_DIR, fname_buf, _MAX_FNAME, ext_buf, _MAX_EXT))
-    return error("Invalid source filename!\n");
-#else
-  char in_filename[FILENAME_MAX];
-  strncpy(in_filename, pSrc_filename, FILENAME_MAX); 
-  const char drive_buf[] = "";
-  char *dir_buf = dirname(in_filename);
-  char *fname_buf = basename(in_filename);
-  char *dot = strrchr(fname_buf, '.');
-  if (dot && dot != fname_buf)
-    *dot = '\0';
-#endif
-
   // Load the source file into memory.
   printf("Loading source file: %s\n", pSrc_filename);
   crn_uint32 src_file_size;
@@ -152,9 +136,22 @@ int main(int argc, char* argv[]) {
 
   // Now create the DDS file.
   char dst_filename[FILENAME_MAX];
-  crnlib_snprintf(dst_filename, sizeof(dst_filename), "%s%s%s.dds", drive_buf, dir_buf, fname_buf);
-  if (out_filename[0])
+  if (out_filename[0]) {
     strcpy(dst_filename, out_filename);
+  } else {
+    unsigned int stripped_length = UINT32_MAX;
+    const char* ext_begin = strrchr(pSrc_filename, '.');
+    if (ext_begin) {
+#ifdef _WIN32
+      const char* sep = strpbrk(ext_begin, "/\\");
+#else
+      const char* sep = strpbrk(ext_begin, "/");
+#endif
+      if (!sep)
+        stripped_length = ext_begin - pSrc_filename;
+    }
+    crnlib_snprintf(dst_filename, sizeof(dst_filename), "%-*s.dds", stripped_length, pSrc_filename);
+  }
 
   printf("Writing DDS file: %s\n", dst_filename);