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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libc/] [stdlib/] [strtoull_r.c] - Rev 816
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/* This code is based on strtoul.c which has the following copyright. It is used to convert a string into an unsigned long long. long long _strtoull_r (struct _reent *rptr, const char *s, char **ptr, int base); */ /* * Copyright (c) 1990 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef __GNUC__ #define _GNU_SOURCE #include <_ansi.h> #include <limits.h> #include <ctype.h> #include <errno.h> #include <stdlib.h> #include <reent.h> /* * Convert a string to an unsigned long long integer. * * Ignores `locale' stuff. Assumes that the upper and lower case * alphabets and digits are each contiguous. */ unsigned long long _DEFUN (_strtoull_r, (rptr, nptr, endptr, base), struct _reent *rptr _AND _CONST char *nptr _AND char **endptr _AND int base) { register const char *s = nptr; register unsigned long long acc; register int c; register unsigned long long cutoff; register int neg = 0, any, cutlim; /* * See strtol for comments as to the logic used. */ do { c = *s++; } while (isspace(c)); if (c == '-') { neg = 1; c = *s++; } else if (c == '+') c = *s++; if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) { c = s[1]; s += 2; base = 16; } if (base == 0) base = c == '0' ? 8 : 10; cutoff = (unsigned long long)ULONG_LONG_MAX / (unsigned long long)base; cutlim = (unsigned long long)ULONG_LONG_MAX % (unsigned long long)base; for (acc = 0, any = 0;; c = *s++) { if (isdigit(c)) c -= '0'; else if (isalpha(c)) c -= isupper(c) ? 'A' - 10 : 'a' - 10; else break; if (c >= base) break; if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) any = -1; else { any = 1; acc *= base; acc += c; } } if (any < 0) { acc = ULONG_LONG_MAX; rptr->_errno = ERANGE; } else if (neg) acc = -acc; if (endptr != 0) *endptr = (char *) (any ? s - 1 : nptr); return (acc); } #endif /* __GNUC__ */