xnu-6153.121.1.tar.gz

[apple/xnu.git] / iokit / Kernel / IOStringFuncs.c

diff --git a/iokit/Kernel/IOStringFuncs.c b/iokit/Kernel/IOStringFuncs.c
index 8fe5ddec5b808bc02e650913750340f7b30cc443..fc3a8f82542c170a9c1ef24d9652d2eefd836b3f 100644 (file)
--- a/iokit/Kernel/IOStringFuncs.c
+++ b/iokit/Kernel/IOStringFuncs.c
@@ -1,25 +1,33 @@
 /*
 /*

- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2016 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
  */

-/*      Copyright (c) 1995 NeXT Computer, Inc.  All rights reserved.
+
+/*
+ *      Copyright (c) 1995 NeXT Computer, Inc.  All rights reserved.

  *
  * strol.c - The functions strtol() & strtoul() are exported as public API
  *           via the header file ~driverkit/generalFuncs.h
  *
  * strol.c - The functions strtol() & strtoul() are exported as public API
  *           via the header file ~driverkit/generalFuncs.h


@@ -32,7 +40,7 @@
  *      Commented out references to errno.
  */
 
  *      Commented out references to errno.
  */
 

-/*-
+/*

  * Copyright (c) 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
  *
  * Copyright (c) 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
  *


@@ -66,38 +74,46 @@
  */
 
 /*
  */
 
 /*

-#include <string.h>
-#include <stdlib.h>
-#include <limits.h>
-*/
-#include <stddef.h>
+ #include <string.h>
+ #include <stdlib.h>
+ #include <limits.h>
+ */
+#include <sys/types.h>

 #include <machine/limits.h>
 
 #include <machine/limits.h>
 

+
+long strtol(const char *nptr, char **endptr, int base);
+unsigned long strtoul(const char *nptr, char **endptr, int base);
+quad_t strtoq(const char *nptr, char **endptr, int base);
+u_quad_t strtouq(const char *nptr, char **endptr, int base);
+char *strncat(char *s1, const char *s2, unsigned long n);
+
+

 typedef int BOOL;
 
 static inline BOOL
 isupper(char c)
 {
 typedef int BOOL;
 
 static inline BOOL
 isupper(char c)
 {

-    return (c >= 'A' && c <= 'Z');
+       return c >= 'A' && c <= 'Z';

 }
 
 static inline BOOL
 isalpha(char c)
 {
 }
 
 static inline BOOL
 isalpha(char c)
 {

-    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
+       return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');

 }
 
 
 static inline BOOL
 isspace(char c)
 {
 }
 
 
 static inline BOOL
 isspace(char c)
 {

-    return (c == ' ' || c == '\t' || c == '\n' || c == '\12');
+       return c == ' ' || c == '\t' || c == '\n' || c == '\12';

 }
 
 static inline BOOL
 isdigit(char c)
 {
 }
 
 static inline BOOL
 isdigit(char c)
 {

-    return (c >= '0' && c <= '9');
+       return c >= '0' && c <= '9';

 }
 
 /*
 }
 
 /*


@@ -107,16 +123,13 @@ isdigit(char c)
  * alphabets and digits are each contiguous.
  */
 long
  * alphabets and digits are each contiguous.
  */
 long

-strtol(nptr, endptr, base)
-       const char *nptr;
-       char **endptr;
-       register int base;
+strtol(const char *nptr, char **endptr, int base)

 {
 {

-       register const char *s = nptr;
-       register unsigned long acc;
-       register int c;
-       register unsigned long cutoff;
-       register int neg = 0, any, cutlim;
+       const char *s = nptr;
+       unsigned long acc;
+       char c;
+       unsigned long cutoff;
+       int neg = 0, any, cutlim;

 
        /*
         * Skip white space and pick up leading +/- sign if any.
 
        /*
         * Skip white space and pick up leading +/- sign if any.


@@ -129,8 +142,9 @@ strtol(nptr, endptr, base)
        if (c == '-') {
                neg = 1;
                c = *s++;
        if (c == '-') {
                neg = 1;
                c = *s++;

-       } else if (c == '+')
+       } else if (c == '+') {

                c = *s++;
                c = *s++;

+       }

        if ((base == 0 || base == 16) &&
            c == '0' && (*s == 'x' || *s == 'X')) {
                c = s[1];
        if ((base == 0 || base == 16) &&
            c == '0' && (*s == 'x' || *s == 'X')) {
                c = s[1];


@@ -142,8 +156,9 @@ strtol(nptr, endptr, base)
                s += 2;
                base = 2;
        }
                s += 2;
                base = 2;
        }

-       if (base == 0)
+       if (base == 0) {

                base = c == '0' ? 8 : 10;
                base = c == '0' ? 8 : 10;

+       }

 
        /*
         * Compute the cutoff value between legal numbers and illegal
 
        /*
         * Compute the cutoff value between legal numbers and illegal


@@ -166,17 +181,19 @@ strtol(nptr, endptr, base)
        cutlim = cutoff % (unsigned long)base;
        cutoff /= (unsigned long)base;
        for (acc = 0, any = 0;; c = *s++) {
        cutlim = cutoff % (unsigned long)base;
        cutoff /= (unsigned long)base;
        for (acc = 0, any = 0;; c = *s++) {

-               if (isdigit(c))
+               if (isdigit(c)) {

                        c -= '0';
                        c -= '0';

-               else if (isalpha(c))
+               } else if (isalpha(c)) {

                        c -= isupper(c) ? 'A' - 10 : 'a' - 10;
                        c -= isupper(c) ? 'A' - 10 : 'a' - 10;

-               else
+               } else {

                        break;
                        break;

-               if (c >= base)
+               }
+               if (c >= base) {

                        break;
                        break;

-               if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim) )
+               }
+               if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) {

                        any = -1;
                        any = -1;

-               else {
+               } else {

                        any = 1;
                        acc *= base;
                        acc += c;
                        any = 1;
                        acc *= base;
                        acc += c;


@@ -185,24 +202,27 @@ strtol(nptr, endptr, base)
        if (any < 0) {
                acc = neg ? LONG_MIN : LONG_MAX;
 //             errno = ERANGE;
        if (any < 0) {
                acc = neg ? LONG_MIN : LONG_MAX;
 //             errno = ERANGE;

-       } else if (neg)
+       } else if (neg) {

                acc = -acc;
                acc = -acc;

-       if (endptr != 0)
-               *endptr = (char *)(any ? s - 1 : nptr);
-       return (acc);
+       }
+       if (endptr != 0) {
+               if (any) {
+                       *endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
+               } else {
+                       *endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
+               }
+       }
+       return acc;

 }
 
 unsigned long
 }
 
 unsigned long

-strtoul(nptr, endptr, base)
-       const char *nptr;
-       char **endptr;
-       register int base;
+strtoul(const char *nptr, char **endptr, int base)

 {
 {

-       register const char *s = nptr;
-       register unsigned long acc;
-       register int c;
-       register unsigned long cutoff;
-       register int neg = 0, any, cutlim;
+       const char *s = nptr;
+       unsigned long acc;
+       char c;
+       unsigned long cutoff;
+       int neg = 0, any, cutlim;

 
        /*
         * See strtol for comments as to the logic used.
 
        /*
         * See strtol for comments as to the logic used.


@@ -213,8 +233,9 @@ strtoul(nptr, endptr, base)
        if (c == '-') {
                neg = 1;
                c = *s++;
        if (c == '-') {
                neg = 1;
                c = *s++;

-       } else if (c == '+')
+       } else if (c == '+') {

                c = *s++;
                c = *s++;

+       }

        if ((base == 0 || base == 16) &&
            c == '0' && (*s == 'x' || *s == 'X')) {
                c = s[1];
        if ((base == 0 || base == 16) &&
            c == '0' && (*s == 'x' || *s == 'X')) {
                c = s[1];


@@ -226,22 +247,25 @@ strtoul(nptr, endptr, base)
                s += 2;
                base = 2;
        }
                s += 2;
                base = 2;
        }

-       if (base == 0)
+       if (base == 0) {

                base = c == '0' ? 8 : 10;
                base = c == '0' ? 8 : 10;

+       }

        cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
        cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
        for (acc = 0, any = 0;; c = *s++) {
        cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
        cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
        for (acc = 0, any = 0;; c = *s++) {

-               if (isdigit(c))
+               if (isdigit(c)) {

                        c -= '0';
                        c -= '0';

-               else if (isalpha(c))
+               } else if (isalpha(c)) {

                        c -= isupper(c) ? 'A' - 10 : 'a' - 10;
                        c -= isupper(c) ? 'A' - 10 : 'a' - 10;

-               else
+               } else {

                        break;
                        break;

-               if (c >= base)
+               }
+               if (c >= base) {

                        break;
                        break;

-               if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim) )
+               }
+               if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) {

                        any = -1;
                        any = -1;

-               else {
+               } else {

                        any = 1;
                        acc *= base;
                        acc += c;
                        any = 1;
                        acc *= base;
                        acc += c;


@@ -250,26 +274,204 @@ strtoul(nptr, endptr, base)
        if (any < 0) {
                acc = ULONG_MAX;
 //             errno = ERANGE;
        if (any < 0) {
                acc = ULONG_MAX;
 //             errno = ERANGE;

-       } else if (neg)
+       } else if (neg) {

                acc = -acc;
                acc = -acc;

-       if (endptr != 0)
-               *endptr = (char *)(any ? s - 1 : nptr);
-       return (acc);
+       }
+       if (endptr != 0) {
+               if (any) {
+                       *endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
+               } else {
+                       *endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
+               }
+       }
+
+       return acc;

 }
 
 /*
 }
 
 /*

+ * Convert a string to a quad integer.

  *
  *

+ * Ignores `locale' stuff.  Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.

  */
  */

+quad_t
+strtoq(const char *nptr, char **endptr, int base)
+{
+       const char *s;
+       u_quad_t acc;
+       char c;
+       u_quad_t qbase, 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(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 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.
+        */
+       qbase = (unsigned)base;
+       cutoff = neg ? -(u_quad_t)QUAD_MIN : QUAD_MAX;
+       cutlim = cutoff % qbase;
+       cutoff /= qbase;
+       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 *= qbase;
+                       acc += c;
+               }
+       }
+       if (any < 0) {
+               acc = neg ? QUAD_MIN : QUAD_MAX;
+//             errno = ERANGE;
+       } else if (neg) {
+               acc = -acc;
+       }
+       if (endptr != 0) {
+               if (any) {
+                       *endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
+               } else {
+                       *endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
+               }
+       }

 
 

-char *strchr(const char *str, int ch)
+       return acc;
+}
+
+
+/*
+ * Convert a string to an unsigned quad integer.
+ *
+ * Ignores `locale' stuff.  Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+u_quad_t
+strtouq(const char *nptr,
+    char **endptr,
+    int base)

 {
 {

-    do {
-       if (*str == ch)
-           return((char *)str);
-    } while (*str++);
-    return ((char *) 0);
+       const char *s = nptr;
+       u_quad_t acc;
+       char c;
+       u_quad_t qbase, cutoff;
+       int neg, any, cutlim;
+
+       /*
+        * See strtoq for comments as to the logic used.
+        */
+       s = nptr;
+       do {
+               c = *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;
+       }
+       qbase = (unsigned)base;
+       cutoff = (u_quad_t)UQUAD_MAX / qbase;
+       cutlim = (u_quad_t)UQUAD_MAX % qbase;
+       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 *= qbase;
+                       acc += c;
+               }
+       }
+       if (any < 0) {
+               acc = UQUAD_MAX;
+//             errno = ERANGE;
+       } else if (neg) {
+               acc = -acc;
+       }
+       if (endptr != 0) {
+               if (any) {
+                       *endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
+               } else {
+                       *endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
+               }
+       }
+
+       return acc;

 }
 
 }
 

+

 /*
  *
  */
 /*
  *
  */


@@ -277,17 +479,20 @@ char *strchr(const char *str, int ch)
 char *
 strncat(char *s1, const char *s2, unsigned long n)
 {
 char *
 strncat(char *s1, const char *s2, unsigned long n)
 {

-       char *os1;
-       int i = n;
+       if (n != 0) {
+               char *d = s1;
+               const char *s = s2;

 
 

-       os1 = s1;
-       while (*s1++)
-               ;
-       --s1;
-       while ((*s1++ = *s2++))
-               if (--i < 0) {
-                       *--s1 = '\0';
-                       break;
+               while (*d != 0) {
+                       d++;

                }
                }

-       return(os1);
+               do {
+                       if ((*d = *s++) == '\0') {
+                               break;
+                       }
+                       d++;
+               } while (--n != 0);
+               *d = '\0';
+       }
+       return s1;

 }
 }