uClibc_uintmaxtostr.h 3.8 KB

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  1. /* Copyright (C) 2003 Manuel Novoa III
  2. *
  3. * This library is free software; you can redistribute it and/or
  4. * modify it under the terms of the GNU Lesser General Public
  5. * License as published by the Free Software Foundation; either
  6. * version 2.1 of the License, or (at your option) any later version.
  7. *
  8. * The GNU C Library is distributed in the hope that it will be useful,
  9. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. * Lesser General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU Lesser General Public
  14. * License along with the GNU C Library; if not, write to the Free
  15. * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. * 02111-1307 USA.
  17. */
  18. /* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION!
  19. *
  20. * This code is currently under development. Also, I plan to port
  21. * it to elks which is a 16-bit environment with a fairly limited
  22. * compiler. Therefore, please refrain from modifying this code
  23. * and, instead, pass any bug-fixes, etc. to me. Thanks. Manuel
  24. *
  25. * ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */
  26. #ifndef _UINTMAXTOSTR_H
  27. #define _UINTMAXTOSTR_H 1
  28. #include <features.h>
  29. #include <limits.h>
  30. #include <stdint.h>
  31. #if INTMAX_MAX <= 2147483647L
  32. #define __UIM_BUFLEN 12 /* 10 digits + 1 nul + 1 sign */
  33. #elif INTMAX_MAX <= 9223372036854775807LL
  34. #define __UIM_BUFLEN 22 /* 20 digits + 1 nul + 1 sign */
  35. #else
  36. #error unknown number of digits for intmax_t!
  37. #endif
  38. #ifdef LLONG_MAX /* --------------- */
  39. #if LLONG_MAX <= 2147483647L
  40. #define __UIM_BUFLEN_LLONG 12 /* 10 digits + 1 nul + 1 sign */
  41. #elif LLONG_MAX <= 9223372036854775807LL
  42. #define __UIM_BUFLEN_LLONG 22 /* 20 digits + 1 nul + 1 sign */
  43. #else
  44. #error unknown number of digits for long long!
  45. #endif
  46. #endif /* ULLONG_MAX ----------------------------- */
  47. #if LONG_MAX <= 2147483647L
  48. #define __UIM_BUFLEN_LONG 12 /* 10 digits + 1 nul + 1 sign */
  49. #elif LONG_MAX <= 9223372036854775807LL
  50. #define __UIM_BUFLEN_LONG 22 /* 20 digits + 1 nul + 1 sign */
  51. #else
  52. #error unknown number of digits for long!
  53. #endif
  54. #if INT_MAX <= 32767
  55. #define __UIM_BUFLEN_INT 7 /* 10 digits + 1 nul + 1 sign */
  56. #elif INT_MAX <= 2147483647L
  57. #define __UIM_BUFLEN_INT 12 /* 10 digits + 1 nul + 1 sign */
  58. #else
  59. #error unknown number of digits for int!
  60. #endif
  61. typedef enum {
  62. __UIM_DECIMAL = 0,
  63. __UIM_GROUP = ',', /* Base 10 locale-dependent grouping. */
  64. __UIM_LOWER = 'a' - 10,
  65. __UIM_UPPER = 'A' - 10,
  66. } __UIM_CASE;
  67. /* Convert the int val to a string in base abs(base). val is treated as
  68. * an unsigned ??? int type if base > 0, and signed if base < 0. This
  69. * is an internal function with _no_ error checking done unless assert()s
  70. * are enabled.
  71. *
  72. * Note: bufend is a pointer to the END of the buffer passed.
  73. * Call like this:
  74. * char buf[SIZE], *p;
  75. * p = _xltostr(buf + sizeof(buf) - 1, {unsigned int}, 10, __UIM_DECIMAL)
  76. * p = _xltostr(buf + sizeof(buf) - 1, {int}, -10, __UIM_DECIMAL)
  77. *
  78. * WARNING: If base > 10, case _must_be_ either __UIM_LOWER or __UIM_UPPER
  79. * for lower and upper case alphas respectively.
  80. * WARNING: If val is really a signed type, make sure base is negative!
  81. * Otherwise, you could overflow your buffer.
  82. */
  83. extern char *_uintmaxtostr(char * __restrict bufend, uintmax_t uval,
  84. int base, __UIM_CASE alphacase) attribute_hidden;
  85. /* TODO -- make this either a (possibly inline) function? */
  86. #ifndef __BCC__
  87. #define _int10tostr(bufend, intval) \
  88. _uintmaxtostr((bufend), (intval), -10, __UIM_DECIMAL)
  89. #else /* bcc doesn't do prototypes, we need to explicitly cast */
  90. #define _int10tostr(bufend, intval) \
  91. _uintmaxtostr((bufend), (uintmax_t)(intval), -10, __UIM_DECIMAL)
  92. #endif
  93. #define __BUFLEN_INT10TOSTR __UIM_BUFLEN_INT
  94. #endif /* _UINTMAXTOSTR_H */