Rev 4874 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* |
2 | This code is based on strtoul.c which has the following copyright. |
||
3 | It is used to convert a string into a signed long long. |
||
4 | |||
5 | long long _strtoll_r (struct _reent *rptr, const char *s, |
||
6 | char **ptr, int base); |
||
7 | */ |
||
8 | |||
9 | /*- |
||
10 | * Copyright (c) 1990 The Regents of the University of California. |
||
11 | * All rights reserved. |
||
12 | * |
||
13 | * Redistribution and use in source and binary forms, with or without |
||
14 | * modification, are permitted provided that the following conditions |
||
15 | * are met: |
||
16 | * 1. Redistributions of source code must retain the above copyright |
||
17 | * notice, this list of conditions and the following disclaimer. |
||
18 | * 2. Redistributions in binary form must reproduce the above copyright |
||
19 | * notice, this list of conditions and the following disclaimer in the |
||
20 | * documentation and/or other materials provided with the distribution. |
||
21 | * 3. All advertising materials mentioning features or use of this software |
||
22 | * must display the following acknowledgement: |
||
23 | * This product includes software developed by the University of |
||
24 | * California, Berkeley and its contributors. |
||
25 | * 4. Neither the name of the University nor the names of its contributors |
||
26 | * may be used to endorse or promote products derived from this software |
||
27 | * without specific prior written permission. |
||
28 | * |
||
29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
||
30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
||
33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
||
34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
||
35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
||
36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||
37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
||
38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
||
39 | * SUCH DAMAGE. |
||
40 | */ |
||
41 | |||
42 | #ifdef __GNUC__ |
||
43 | |||
44 | #define _GNU_SOURCE |
||
45 | #include <_ansi.h> |
||
46 | #include |
||
47 | #include |
||
48 | #include |
||
49 | #include |
||
50 | #include |
||
51 | |||
52 | /* |
||
53 | * Convert a string to a long long integer. |
||
54 | * |
||
55 | * Ignores `locale' stuff. Assumes that the upper and lower case |
||
56 | * alphabets and digits are each contiguous. |
||
57 | */ |
||
58 | long long |
||
59 | _DEFUN (_strtoll_r, (rptr, nptr, endptr, base), |
||
60 | struct _reent *rptr _AND |
||
4921 | Serge | 61 | _CONST char *__restrict nptr _AND |
62 | char **__restrict endptr _AND |
||
4349 | Serge | 63 | int base) |
64 | { |
||
65 | register const unsigned char *s = (const unsigned char *)nptr; |
||
66 | register unsigned long long acc; |
||
67 | register int c; |
||
68 | register unsigned long long cutoff; |
||
69 | register int neg = 0, any, cutlim; |
||
70 | |||
71 | /* |
||
72 | * Skip white space and pick up leading +/- sign if any. |
||
73 | * If base is 0, allow 0x for hex and 0 for octal, else |
||
74 | * assume decimal; if base is already 16, allow 0x. |
||
75 | */ |
||
76 | do { |
||
77 | c = *s++; |
||
78 | } while (isspace(c)); |
||
79 | if (c == '-') { |
||
80 | neg = 1; |
||
81 | c = *s++; |
||
82 | } else if (c == '+') |
||
83 | c = *s++; |
||
84 | if ((base == 0 || base == 16) && |
||
85 | c == '0' && (*s == 'x' || *s == 'X')) { |
||
86 | c = s[1]; |
||
87 | s += 2; |
||
88 | base = 16; |
||
89 | } |
||
90 | if (base == 0) |
||
91 | base = c == '0' ? 8 : 10; |
||
92 | |||
93 | /* |
||
94 | * Compute the cutoff value between legal numbers and illegal |
||
95 | * numbers. That is the largest legal value, divided by the |
||
96 | * base. An input number that is greater than this value, if |
||
97 | * followed by a legal input character, is too big. One that |
||
98 | * is equal to this value may be valid or not; the limit |
||
99 | * between valid and invalid numbers is then based on the last |
||
100 | * digit. For instance, if the range for longs is |
||
101 | * [-2147483648..2147483647] and the input base is 10, |
||
102 | * cutoff will be set to 214748364 and cutlim to either |
||
103 | * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated |
||
104 | * a value > 214748364, or equal but the next digit is > 7 (or 8), |
||
105 | * the number is too big, and we will return a range error. |
||
106 | * |
||
107 | * Set any if any `digits' consumed; make it negative to indicate |
||
108 | * overflow. |
||
109 | */ |
||
110 | cutoff = neg ? -(unsigned long long)LONG_LONG_MIN : LONG_LONG_MAX; |
||
111 | cutlim = cutoff % (unsigned long long)base; |
||
112 | cutoff /= (unsigned long long)base; |
||
113 | for (acc = 0, any = 0;; c = *s++) { |
||
114 | if (isdigit(c)) |
||
115 | c -= '0'; |
||
116 | else if (isalpha(c)) |
||
117 | c -= isupper(c) ? 'A' - 10 : 'a' - 10; |
||
118 | else |
||
119 | break; |
||
120 | if (c >= base) |
||
121 | break; |
||
122 | if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) |
||
123 | any = -1; |
||
124 | else { |
||
125 | any = 1; |
||
126 | acc *= base; |
||
127 | acc += c; |
||
128 | } |
||
129 | } |
||
130 | if (any < 0) { |
||
131 | acc = neg ? LONG_LONG_MIN : LONG_LONG_MAX; |
||
132 | rptr->_errno = ERANGE; |
||
133 | } else if (neg) |
||
134 | acc = -acc; |
||
135 | if (endptr != 0) |
||
136 | *endptr = (char *) (any ? (char *)s - 1 : nptr); |
||
137 | return (acc); |
||
138 | } |
||
139 | |||
140 | #endif /* __GNUC__ */>> |