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; see the file COPYING.LIB. If 15 * not, see <http://www.gnu.org/licenses/>. 16 */ 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 27 #ifndef _UINTMAXTOSTR_H 28 #define _UINTMAXTOSTR_H 1 29 30 #include <features.h> 31 #include <limits.h> 32 #include <stdint.h> 33 34 #if INTMAX_MAX <= 2147483647L 35 #define __UIM_BUFLEN 12 /* 10 digits + 1 nul + 1 sign */ 36 #elif INTMAX_MAX <= 9223372036854775807LL 37 #define __UIM_BUFLEN 22 /* 20 digits + 1 nul + 1 sign */ 38 #else 39 #error unknown number of digits for intmax_t! 40 #endif 41 42 #ifdef LLONG_MAX /* --------------- */ 43 #if LLONG_MAX <= 2147483647L 44 #define __UIM_BUFLEN_LLONG 12 /* 10 digits + 1 nul + 1 sign */ 45 #elif LLONG_MAX <= 9223372036854775807LL 46 #define __UIM_BUFLEN_LLONG 22 /* 20 digits + 1 nul + 1 sign */ 47 #else 48 #error unknown number of digits for long long! 49 #endif 50 #endif /* ULLONG_MAX ----------------------------- */ 51 52 #if LONG_MAX <= 2147483647L 53 #define __UIM_BUFLEN_LONG 12 /* 10 digits + 1 nul + 1 sign */ 54 #elif LONG_MAX <= 9223372036854775807LL 55 #define __UIM_BUFLEN_LONG 22 /* 20 digits + 1 nul + 1 sign */ 56 #else 57 #error unknown number of digits for long! 58 #endif 59 60 #if INT_MAX <= 32767 61 #define __UIM_BUFLEN_INT 7 /* 10 digits + 1 nul + 1 sign */ 62 #elif INT_MAX <= 2147483647L 63 #define __UIM_BUFLEN_INT 12 /* 10 digits + 1 nul + 1 sign */ 64 #else 65 #error unknown number of digits for int! 66 #endif 67 68 typedef enum { 69 __UIM_DECIMAL = 0, 70 __UIM_GROUP = ',', /* Base 10 locale-dependent grouping. */ 71 __UIM_LOWER = 'a' - 10, 72 __UIM_UPPER = 'A' - 10, 73 } __UIM_CASE; 74 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) attribute_hidden; 93 94 /* TODO -- make this either a (possibly inline) function? */ 95 #ifndef __BCC__ 96 #define _int10tostr(bufend, intval) \ 97 _uintmaxtostr((bufend), (intval), -10, __UIM_DECIMAL) 98 #else /* bcc doesn't do prototypes, we need to explicitly cast */ 99 #define _int10tostr(bufend, intval) \ 100 _uintmaxtostr((bufend), (uintmax_t)(intval), -10, __UIM_DECIMAL) 101 #endif 102 103 #define __BUFLEN_INT10TOSTR __UIM_BUFLEN_INT 104 105 #endif /* _UINTMAXTOSTR_H */ 106