e70152e44cc66cc599ff6b699eb8adc07f3e656a
kent
  Sat May 24 21:09:34 2014 -0700
Adding Copyright NNNN Regents of the University of California to all files I believe with reasonable certainty were developed under UCSC employ or as part of Genome Browser copyright assignment.
diff --git src/utils/nt4Frag/nt4Frag.c src/utils/nt4Frag/nt4Frag.c
index 3a78288..3e25453 100644
--- src/utils/nt4Frag/nt4Frag.c
+++ src/utils/nt4Frag/nt4Frag.c
@@ -1,53 +1,56 @@
 /* nt4Frag - Extract a piece of a .nt4 file to .fa format. */
+
+/* Copyright (C) 2011 The Regents of the University of California 
+ * See README in this or parent directory for licensing information. */
 #include "common.h"
 #include "nt4.h"
 #include "fa.h"
 
 
 
 void usage()
 /* Explain usage and exit. */
 {
 errAbort(
   "nt4Frag - Extract a piece of a .nt4 file to .fa format\n"
   "usage:\n"
   "   nt4Frag file.nib start end strand out.fa\n");
 }
 
 void nt4Frag(char *fileName, int start, int end, char strand, char *faFile)
 /* nt4Frag - Extract part of a .nt4 file as .fa. */
 {
 DNA *dna;
 int size;
 char seqName[512];
 
 if (strand != '+' && strand != '-')
    {
    usage();
    }
 if (start >= end)
    {
    usage();
    }
 size = end - start;
 dna = nt4LoadPart(fileName, start, size);
 if (strand == '-')
     reverseComplement(dna, size);
 sprintf(seqName, "%s:%d%c%d", fileName, start, strand, end);
 faWrite(faFile, seqName, dna, size);
 }
 
 int main(int argc, char *argv[])
 /* Process command line. */
 {
 if (argc != 6)
     {
     usage();
     }
 if (!isdigit(argv[2][0]) || !isdigit(argv[3][0]))
     {
     usage();
     }
 nt4Frag(argv[1], atoi(argv[2]), atoi(argv[3]), argv[4][0], argv[5]);
 return 0;
 }