uClibc_uintmaxtostr.h 4.0 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 Library General Public
  5. * License as published by the Free Software Foundation; either
  6. * version 2 of the License, or (at your option) any later version.
  7. *
  8. * This 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. * Library General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU Library General Public
  14. * License along with this library; if not, write to the Free
  15. * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16. */
  17. /* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION!
  18. *
  19. * This code is currently under development. Also, I plan to port
  20. * it to elks which is a 16-bit environment with a fairly limited
  21. * compiler. Therefore, please refrain from modifying this code
  22. * and, instead, pass any bug-fixes, etc. to me. Thanks. Manuel
  23. *
  24. * ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */
  25. #ifndef _UINTMAXTOSTR_H
  26. #define _UINTMAXTOSTR_H 1
  27. #ifdef _FEATURES_H
  28. # ifndef __USE_ISOC99
  29. # error features was included without defining _ISOC99_SOURCE!
  30. # endif
  31. #else
  32. # ifndef _ISOC99_SOURCE
  33. # define _ISOC99_SOURCE
  34. # endif
  35. #endif
  36. #include <features.h>
  37. #include <limits.h>
  38. #include <stdint.h>
  39. #if INTMAX_MAX <= 2147483647L
  40. #define __UIM_BUFLEN 12 /* 10 digits + 1 nul + 1 sign */
  41. #elif INTMAX_MAX <= 9223372036854775807LL
  42. #define __UIM_BUFLEN 22 /* 20 digits + 1 nul + 1 sign */
  43. #else
  44. #error unknown number of digits for intmax_t!
  45. #endif
  46. #ifdef LLONG_MAX /* --------------- */
  47. #if LLONG_MAX <= 2147483647L
  48. #define __UIM_BUFLEN_LLONG 12 /* 10 digits + 1 nul + 1 sign */
  49. #elif LLONG_MAX <= 9223372036854775807LL
  50. #define __UIM_BUFLEN_LLONG 22 /* 20 digits + 1 nul + 1 sign */
  51. #else
  52. #error unknown number of digits for long long!
  53. #endif
  54. #endif /* ULLONG_MAX ----------------------------- */
  55. #if LONG_MAX <= 2147483647L
  56. #define __UIM_BUFLEN_LONG 12 /* 10 digits + 1 nul + 1 sign */
  57. #elif LONG_MAX <= 9223372036854775807LL
  58. #define __UIM_BUFLEN_LONG 22 /* 20 digits + 1 nul + 1 sign */
  59. #else
  60. #error unknown number of digits for long!
  61. #endif
  62. #if INT_MAX <= 32767
  63. #define __UIM_BUFLEN_INT 7 /* 10 digits + 1 nul + 1 sign */
  64. #elif INT_MAX <= 2147483647L
  65. #define __UIM_BUFLEN_INT 12 /* 10 digits + 1 nul + 1 sign */
  66. #else
  67. #error unknown number of digits for int!
  68. #endif
  69. typedef enum {
  70. __UIM_DECIMAL = 0,
  71. __UIM_GROUP = ',', /* Base 10 locale-dependent grouping. */
  72. __UIM_LOWER = 'a' - 10,
  73. __UIM_UPPER = 'A' - 10,
  74. } __UIM_CASE;
  75. /* Convert the int val to a string in base abs(base). val is treated as
  76. * an unsigned ??? int type if base > 0, and signed if base < 0. This
  77. * is an internal function with _no_ error checking done unless assert()s
  78. * are enabled.
  79. *
  80. * Note: bufend is a pointer to the END of the buffer passed.
  81. * Call like this:
  82. * char buf[SIZE], *p;
  83. * p = _xltostr(buf + sizeof(buf) - 1, {unsigned int}, 10, __UIM_DECIMAL)
  84. * p = _xltostr(buf + sizeof(buf) - 1, {int}, -10, __UIM_DECIMAL)
  85. *
  86. * WARNING: If base > 10, case _must_be_ either __UIM_LOWER or __UIM_UPPER
  87. * for lower and upper case alphas respectively.
  88. * WARNING: If val is really a signed type, make sure base is negative!
  89. * Otherwise, you could overflow your buffer.
  90. */
  91. extern char *_uintmaxtostr(char * __restrict bufend, uintmax_t uval,
  92. int base, __UIM_CASE alphacase);
  93. /* TODO -- make this either a (possibly inline) function? */
  94. #ifndef __BCC__
  95. #define _int10tostr(bufend, intval) \
  96. _uintmaxtostr((bufend), (intval), -10, __UIM_DECIMAL)
  97. #else /* bcc doesn't do prototypes, we need to explicitly cast */
  98. #define _int10tostr(bufend, intval) \
  99. _uintmaxtostr((bufend), (uintmax_t)(intval), -10, __UIM_DECIMAL)
  100. #endif
  101. #define __BUFLEN_INT10TOSTR __UIM_BUFLEN_INT
  102. #endif /* _UINTMAXTOSTR_H */