diff options
Diffstat (limited to 'third_party/heimdal/lib/roken/strtoll.c')
| -rw-r--r-- | third_party/heimdal/lib/roken/strtoll.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/strtoll.c b/third_party/heimdal/lib/roken/strtoll.c new file mode 100644 index 0000000..96c1b25 --- /dev/null +++ b/third_party/heimdal/lib/roken/strtoll.c @@ -0,0 +1,155 @@ +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Copyright (c) 2011 The FreeBSD Foundation + * All rights reserved. + * Portions of this software were developed by David Chisnall + * under sponsorship from the FreeBSD Foundation. + * + * 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. + * 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. + */ + +#include <config.h> + +#include <string.h> + +#include "roken.h" + +#ifndef HAVE_STRTOLL + +/* #include <sys/cdefs.h> */ + +#include <limits.h> +#include <errno.h> +#include <ctype.h> +#include <stdlib.h> +#include <stdint.h> + +/* + * Convert a string to a long long integer. + * + * Assumes that the upper and lower case + * alphabets and digits are each contiguous. + */ +ROKEN_LIB_FUNCTION long long ROKEN_LIB_CALL +strtoll(const char * nptr, char ** endptr, int base) +{ + const char *s; + unsigned long long acc; + long long ret = 0; + char c; + unsigned long long cutoff; + int neg, any, cutlim; + + /* + * Skip white space and pick up leading +/- sign if any. + * If base is 0, allow 0x for hex and 0 for octal, else + * assume decimal; if base is already 16, allow 0x. + */ + s = nptr; + do { + c = *s++; + } while (isspace((unsigned char)c)); + if (c == '-') { + neg = 1; + c = *s++; + } else { + neg = 0; + if (c == '+') + c = *s++; + } + if ((base == 0 || base == 16) && + c == '0' && (*s == 'x' || *s == 'X') && + ((s[1] >= '0' && s[1] <= '9') || + (s[1] >= 'A' && s[1] <= 'F') || + (s[1] >= 'a' && s[1] <= 'f'))) { + c = s[1]; + s += 2; + base = 16; + } + if (base == 0) + base = c == '0' ? 8 : 10; + acc = any = 0; + if (base < 2 || base > 36) + goto noconv; + + /* + * Compute the cutoff value between legal numbers and illegal + * numbers. That is the largest legal value, divided by the + * base. An input number that is greater than this value, if + * followed by a legal input character, is too big. One that + * is equal to this value may be valid or not; the limit + * between valid and invalid numbers is then based on the last + * digit. For instance, if the range for quads is + * [-9223372036854775808..9223372036854775807] and the input base + * is 10, cutoff will be set to 922337203685477580 and cutlim to + * either 7 (neg==0) or 8 (neg==1), meaning that if we have + * accumulated a value > 922337203685477580, or equal but the + * next digit is > 7 (or 8), the number is too big, and we will + * return a range error. + * + * Set 'any' if any `digits' consumed; make it negative to indicate + * overflow. + */ + cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX + : LLONG_MAX; + cutlim = cutoff % base; + cutoff /= base; + for ( ; ; c = *s++) { + if (c >= '0' && c <= '9') + c -= '0'; + else if (c >= 'A' && c <= 'Z') + c -= 'A' - 10; + else if (c >= 'a' && c <= 'z') + c -= '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) { + ret = neg ? LLONG_MIN : LLONG_MAX; + errno = ERANGE; + } else if (!any) { +noconv: + errno = EINVAL; + } else if (neg) { + ret = -(long long)acc; + } else { + ret = acc; + } + if (endptr != NULL) + *endptr = (char *)(any ? s - 1 : nptr); + return ret; +} +#endif /* !HAVE_STRTOLL */ |