Fix trailing whitespace

tools/trailing_whitespace.c

@@ -0,0 +1,32 @@
+#define STB_DEFINE
+#include "stb.h"
+
+int main(int argc, char **argv)
+{
+   int i;
+   for (i=1; i < argc; ++i) {
+      int len;
+      FILE *f;
+      char *s = stb_file(argv[i], &len);
+      char *end, *src, *dest;
+      if (s == NULL) {
+         printf("Couldn't read file '%s'.\n", argv[i]);
+         continue; 
+      }
+      end = s + len;
+      src = dest = s;
+      while (src < end) {
+         char *start=0;
+         while (src < end && *src != '\n' && *src != '\r')
+            *dest++ = *src++;
+         while (dest-1 > s && (dest[-1] == ' ' || dest[-1] == '\t'))
+            --dest;
+         while (src < end && (*src == '\n' || *src == '\r'))
+            *dest++ = *src++;
+      }
+      f = fopen(argv[i], "wb");
+      fwrite(s, 1, dest-s, f);
+      fclose(f);
+   }
+    return 0;
+}