misc.c 704 B

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  1. /*
  2. * This file is part of the UCB release of Plan 9. It is subject to the license
  3. * terms in the LICENSE file found in the top-level directory of this
  4. * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
  5. * part of the UCB release of Plan 9, including this file, may be copied,
  6. * modified, propagated, or distributed except according to the terms contained
  7. * in the LICENSE file.
  8. */
  9. #include <u.h>
  10. #include <libc.h>
  11. #include <ctype.h>
  12. char*
  13. strupr(char *s)
  14. {
  15. char *p;
  16. for(p = s; *p; p++)
  17. if(*p >= 0 && islower(*p))
  18. *p = toupper(*p);
  19. return s;
  20. }
  21. char*
  22. strlwr(char *s)
  23. {
  24. char *p;
  25. for(p = s; *p; p++)
  26. if(*p >= 0 && isupper(*p))
  27. *p = tolower(*p);
  28. return s;
  29. }