diff options
Diffstat (limited to 'libc/sysdeps/linux/common/bits/uClibc_uintmaxtostr.h')
| -rw-r--r-- | libc/sysdeps/linux/common/bits/uClibc_uintmaxtostr.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/bits/uClibc_uintmaxtostr.h b/libc/sysdeps/linux/common/bits/uClibc_uintmaxtostr.h new file mode 100644 index 000000000..9b98054a6 --- /dev/null +++ b/libc/sysdeps/linux/common/bits/uClibc_uintmaxtostr.h @@ -0,0 +1,115 @@ +/* Copyright (C) 2003 Manuel Novoa III + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! + * + * This code is currently under development. Also, I plan to port + * it to elks which is a 16-bit environment with a fairly limited + * compiler. Therefore, please refrain from modifying this code + * and, instead, pass any bug-fixes, etc. to me. Thanks. Manuel + * + * ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */ + +#ifndef _UINTMAXTOSTR_H +#define _UINTMAXTOSTR_H 1 + +#ifdef _FEATURES_H +# ifndef __USE_ISOC99 +# error features was included without defining _ISOC99_SOURCE! +# endif +#else +# ifndef _ISOC99_SOURCE +# define _ISOC99_SOURCE +# endif +#endif + +#include <features.h> +#include <limits.h> +#include <stdint.h> + +#if INTMAX_MAX <= 2147483647L +#define __UIM_BUFLEN 12 /* 10 digits + 1 nul + 1 sign */ +#elif INTMAX_MAX <= 9223372036854775807LL +#define __UIM_BUFLEN 22 /* 20 digits + 1 nul + 1 sign */ +#else +#error unknown number of digits for intmax_t! +#endif + +#ifdef LLONG_MAX /* --------------- */ +#if LLONG_MAX <= 2147483647L +#define __UIM_BUFLEN_LLONG 12 /* 10 digits + 1 nul + 1 sign */ +#elif LLONG_MAX <= 9223372036854775807LL +#define __UIM_BUFLEN_LLONG 22 /* 20 digits + 1 nul + 1 sign */ +#else +#error unknown number of digits for long long! +#endif +#endif /* ULLONG_MAX ----------------------------- */ + +#if LONG_MAX <= 2147483647L +#define __UIM_BUFLEN_LONG 12 /* 10 digits + 1 nul + 1 sign */ +#elif LONG_MAX <= 9223372036854775807LL +#define __UIM_BUFLEN_LONG 22 /* 20 digits + 1 nul + 1 sign */ +#else +#error unknown number of digits for long! +#endif + +#if INT_MAX <= 32767 +#define __UIM_BUFLEN_INT 7 /* 10 digits + 1 nul + 1 sign */ +#elif INT_MAX <= 2147483647L +#define __UIM_BUFLEN_INT 12 /* 10 digits + 1 nul + 1 sign */ +#else +#error unknown number of digits for int! +#endif + +typedef enum { + __UIM_DECIMAL = 0, + __UIM_GROUP = ',', /* Base 10 locale-dependent grouping. */ + __UIM_LOWER = 'a' - 10, + __UIM_UPPER = 'A' - 10, +} __UIM_CASE; + +/* Convert the int val to a string in base abs(base). val is treated as + * an unsigned ??? int type if base > 0, and signed if base < 0. This + * is an internal function with _no_ error checking done unless assert()s + * are enabled. + * + * Note: bufend is a pointer to the END of the buffer passed. + * Call like this: + * char buf[SIZE], *p; + * p = _xltostr(buf + sizeof(buf) - 1, {unsigned int}, 10, __UIM_DECIMAL) + * p = _xltostr(buf + sizeof(buf) - 1, {int}, -10, __UIM_DECIMAL) + * + * WARNING: If base > 10, case _must_be_ either __UIM_LOWER or __UIM_UPPER + * for lower and upper case alphas respectively. + * WARNING: If val is really a signed type, make sure base is negative! + * Otherwise, you could overflow your buffer. + */ +extern char *_uintmaxtostr(char * __restrict bufend, uintmax_t uval, + int base, __UIM_CASE alphacase); + +/* TODO -- make this either a (possibly inline) function? */ +#ifndef __BCC__ +#define _int10tostr(bufend, intval) \ + _uintmaxtostr((bufend), (intval), -10, __UIM_DECIMAL) +#else /* bcc doesn't do prototypes, we need to explicitly cast */ +#define _int10tostr(bufend, intval) \ + _uintmaxtostr((bufend), (uintmax_t)(intval), -10, __UIM_DECIMAL) +#endif + +#define __BUFLEN_INT10TOSTR __UIM_BUFLEN_INT + +#endif /* _UINTMAXTOSTR_H */ |