diff options
Diffstat (limited to 'src/backend/port/sunos4/strtol.c')
| -rw-r--r-- | src/backend/port/sunos4/strtol.c | 96 |
1 files changed, 53 insertions, 43 deletions
diff --git a/src/backend/port/sunos4/strtol.c b/src/backend/port/sunos4/strtol.c index 5850848e66a..c788d94bd50 100644 --- a/src/backend/port/sunos4/strtol.c +++ b/src/backend/port/sunos4/strtol.c @@ -6,22 +6,22 @@ * 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. + * 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. + * 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. + * 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. + * 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 + * 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) @@ -32,8 +32,9 @@ */ #if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)strtol.c 5.4 (Berkeley) 2/23/91"; -#endif /* LIBC_SCCS and not lint */ +static char sccsid[] = "@(#)strtol.c 5.4 (Berkeley) 2/23/91"; + +#endif /* LIBC_SCCS and not lint */ #include <limits.h> #include <ctype.h> @@ -50,31 +51,37 @@ static char sccsid[] = "@(#)strtol.c 5.4 (Berkeley) 2/23/91"; */ long strtol(nptr, endptr, base) - const char *nptr; - char **endptr; - register int base; +const char *nptr; +char **endptr; +register int base; { register const char *s = nptr; register unsigned long acc; - register int c; + register int c; register unsigned long cutoff; - register int neg = 0, any, cutlim; + register int neg = 0, + 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. + * 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. */ - do { + do + { c = *s++; } while (isspace(c)); - if (c == '-') { + if (c == '-') + { neg = 1; c = *s++; - } else if (c == '+') + } + else if (c == '+') c = *s++; if ((base == 0 || base == 16) && - c == '0' && (*s == 'x' || *s == 'X')) { + c == '0' && (*s == 'x' || *s == 'X')) + { c = s[1]; s += 2; base = 16; @@ -83,26 +90,26 @@ strtol(nptr, endptr, base) 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. + * 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 ? -(unsigned long)LONG_MIN : LONG_MAX; - cutlim = cutoff % (unsigned long)base; - cutoff /= (unsigned long)base; - for (acc = 0, any = 0;; c = *s++) { + cutoff = neg ? -(unsigned long) LONG_MIN : LONG_MAX; + cutlim = cutoff % (unsigned long) base; + cutoff /= (unsigned long) base; + for (acc = 0, any = 0;; c = *s++) + { if (isdigit(c)) c -= '0'; else if (isalpha(c)) @@ -113,18 +120,21 @@ strtol(nptr, endptr, base) break; if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim) any = -1; - else { + else + { any = 1; acc *= base; acc += c; } } - if (any < 0) { + if (any < 0) + { acc = neg ? LONG_MIN : LONG_MAX; errno = ERANGE; - } else if (neg) + } + else if (neg) acc = -acc; if (endptr != 0) - *endptr = any ? s - 1 : (char *)nptr; + *endptr = any ? s - 1 : (char *) nptr; return (acc); } |