/contrib/bind9/lib/isc/parseint.c

https://bitbucket.org/freebsd/freebsd-head/ · C · 72 lines · 46 code · 8 blank · 18 comment · 13 complexity · aaf971c0c7dfab0c2f8fb5d4a2de7163 MD5 · raw file

  1. /*
  2. * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
  3. * Copyright (C) 2001-2003 Internet Software Consortium.
  4. *
  5. * Permission to use, copy, modify, and/or distribute this software for any
  6. * purpose with or without fee is hereby granted, provided that the above
  7. * copyright notice and this permission notice appear in all copies.
  8. *
  9. * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10. * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11. * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12. * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13. * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14. * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15. * PERFORMANCE OF THIS SOFTWARE.
  16. */
  17. /* $Id: parseint.c,v 1.8 2007/06/19 23:47:17 tbox Exp $ */
  18. /*! \file */
  19. #include <config.h>
  20. #include <ctype.h>
  21. #include <errno.h>
  22. #include <limits.h>
  23. #include <isc/parseint.h>
  24. #include <isc/result.h>
  25. #include <isc/stdlib.h>
  26. isc_result_t
  27. isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) {
  28. unsigned long n;
  29. char *e;
  30. if (! isalnum((unsigned char)(string[0])))
  31. return (ISC_R_BADNUMBER);
  32. errno = 0;
  33. n = strtoul(string, &e, base);
  34. if (*e != '\0')
  35. return (ISC_R_BADNUMBER);
  36. if (n == ULONG_MAX && errno == ERANGE)
  37. return (ISC_R_RANGE);
  38. *uip = n;
  39. return (ISC_R_SUCCESS);
  40. }
  41. isc_result_t
  42. isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) {
  43. isc_uint32_t val;
  44. isc_result_t result;
  45. result = isc_parse_uint32(&val, string, base);
  46. if (result != ISC_R_SUCCESS)
  47. return (result);
  48. if (val > 0xFFFF)
  49. return (ISC_R_RANGE);
  50. *uip = (isc_uint16_t) val;
  51. return (ISC_R_SUCCESS);
  52. }
  53. isc_result_t
  54. isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) {
  55. isc_uint32_t val;
  56. isc_result_t result;
  57. result = isc_parse_uint32(&val, string, base);
  58. if (result != ISC_R_SUCCESS)
  59. return (result);
  60. if (val > 0xFF)
  61. return (ISC_R_RANGE);
  62. *uip = (isc_uint8_t) val;
  63. return (ISC_R_SUCCESS);
  64. }