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Diffstat (limited to 'libc/stdlib/strtol.c')
| -rw-r--r-- | libc/stdlib/strtol.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/libc/stdlib/strtol.c b/libc/stdlib/strtol.c deleted file mode 100644 index a3cdbcd..0000000 --- a/libc/stdlib/strtol.c +++ /dev/null @@ -1,140 +0,0 @@ -/* $OpenBSD: strtol.c,v 1.7 2005/08/08 08:05:37 espie Exp $ */ -/*- - * Copyright (c) 1990 The 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. 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 <ctype.h> -#include <errno.h> -#include <limits.h> -#include <stdlib.h> - - -/* - * Convert a string to a long integer. - * - * Ignores `locale' stuff. Assumes that the upper and lower case - * alphabets and digits are each contiguous. - */ -long -strtol(const char *nptr, char **endptr, int base) -{ - const char *s; - long acc, cutoff; - int c; - 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 = (unsigned char) *s++; - } while (isspace(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')) { - c = s[1]; - s += 2; - base = 16; - } - if (base == 0) - base = c == '0' ? 8 : 10; - - /* - * 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 longs is - * [-2147483648..2147483647] and the input base is 10, - * cutoff will be set to 214748364 and cutlim to either - * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated - * a value > 214748364, 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 ? LONG_MIN : LONG_MAX; - cutlim = cutoff % base; - cutoff /= base; - if (neg) { - if (cutlim > 0) { - cutlim -= base; - cutoff += 1; - } - cutlim = -cutlim; - } - for (acc = 0, any = 0;; c = (unsigned char) *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) - continue; - if (neg) { - if (acc < cutoff || (acc == cutoff && c > cutlim)) { - any = -1; - acc = LONG_MIN; - errno = ERANGE; - } else { - any = 1; - acc *= base; - acc -= c; - } - } else { - if (acc > cutoff || (acc == cutoff && c > cutlim)) { - any = -1; - acc = LONG_MAX; - errno = ERANGE; - } else { - any = 1; - acc *= base; - acc += c; - } - } - } - if (endptr != 0) - *endptr = (char *) (any ? s - 1 : nptr); - return (acc); -} |