Libc-320.tar.gz

[apple/libc.git] / stdlib / FreeBSD / strtoull.c

diff --git a/stdlib/FreeBSD/strtoull.c b/stdlib/FreeBSD/strtoull.c
new file mode 100644 (file)
index 0000000..43f3138
--- /dev/null
+++ b/stdlib/FreeBSD/strtoull.c
@@ -0,0 +1,119 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *     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. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strtouq.c  8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/strtoull.c,v 1.18 2002/09/06 11:23:59 tjr Exp $");
+
+#include <limits.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+/*
+ * Convert a string to an unsigned long long integer.
+ *
+ * Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+unsigned long long
+strtoull(const char * __restrict nptr, char ** __restrict endptr, int base)
+{
+       const char *s;
+       unsigned long long acc;
+       char c;
+       unsigned long long cutoff;
+       int neg, any, cutlim;
+
+       /*
+        * See strtoq for comments as to the logic used.
+        */
+       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')) {
+               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;
+
+       cutoff = ULLONG_MAX / base;
+       cutlim = ULLONG_MAX % 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) {
+               acc = ULLONG_MAX;
+               errno = ERANGE;
+       } else if (!any) {
+noconv:
+               errno = EINVAL;
+       } else if (neg)
+               acc = -acc;
+       if (endptr != NULL)
+               *endptr = (char *)(any ? s - 1 : nptr);
+       return (acc);
+}